WO2018202942A1 - Procédé de retour d'informations csi - Google Patents

Procédé de retour d'informations csi Download PDF

Info

Publication number
WO2018202942A1
WO2018202942A1 PCT/FI2018/050291 FI2018050291W WO2018202942A1 WO 2018202942 A1 WO2018202942 A1 WO 2018202942A1 FI 2018050291 W FI2018050291 W FI 2018050291W WO 2018202942 A1 WO2018202942 A1 WO 2018202942A1
Authority
WO
WIPO (PCT)
Prior art keywords
csi
csi component
user device
pool
component
Prior art date
Application number
PCT/FI2018/050291
Other languages
English (en)
Inventor
De Shan MIAO
Mihai Enescu
Yi Zhang
Original Assignee
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Technologies Oy filed Critical Nokia Technologies Oy
Publication of WO2018202942A1 publication Critical patent/WO2018202942A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478—Special codebook structures directed to feedback optimisation

Definitions

  • NR new radio
  • MIMO multiple input, multiple output
  • gNB 5G Enhanced Node B Base station
  • FIG. 1 is a block diagram of one possible and non-limiting example system in which the example embodiments may be practiced;
  • FIG. 2 shows an example illustration of gNB indication signaling
  • FIG. 3 shows a method in accordance with example embodiments which may be performed by an apparatus.
  • a user equipment (UE) 110 is in wireless communication with a wireless network 100.
  • a UE is a wireless, typically mobile device that can access a wireless network.
  • the UE 110 includes one or more processors 120, one or more memories 125, and one or more transceivers 130 interconnected through one or more buses 127.
  • Each of the one or more transceivers 130 includes a receiver, Rx, 132 and a transmitter, Tx, 133.
  • the one or more buses 127 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, and the like.
  • the one or more transceivers 130 are connected to one or more antennas 128.
  • the one or more memories 125 include computer program code 123.
  • the UE 110 includes a signaling module 140, comprising one of or both parts 140-1 and/or 140-2, which may be implemented in a number of ways.
  • the signaling module 140 may be implemented in hardware as signaling module 140-1, such as being implemented as part of the one or more processors 120.
  • the signaling module 140-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array.
  • the signaling module 140 may be implemented as signaling module 140-2, which is implemented as computer program code 123 and is executed by the one or more processors 120.
  • the one or more memories 125 and the computer program code 123 may be configured to, with the one or more processors 120, cause the user equipment 110 to perform one or more of the operations as described herein.
  • the UE 110 communicates with eNB 170 via a wireless link 111.
  • the gNB (NR/5G Node B but possibly an evolved NodeB) 170 is a base station
  • the gNB 170 includes one or more processors 152, one or more memories 155, one or more network interfaces (N/W I/F(s)) 161, and one or more transceivers 160 interconnected through one or more buses 157.
  • Each of the one or more transceivers 160 includes a receiver, Rx, 162 and a transmitter, Tx, 163.
  • the one or more transceivers 160 are connected to one or more antennas 158.
  • the one or more memories 155 include computer program code 153.
  • the gNB 170 includes a report module 150, comprising one of or both parts 150-1 and/or 150-2, which may be implemented in a number of ways.
  • the report module 150 may be implemented in hardware as report module 150-1, such as being implemented as part of the one or more processors 152.
  • the report module 150-1 may be implemented also as an integrated circuit or through other hardware such as a programmable gate array.
  • the report module 150 may be implemented as report module 150-2, which is implemented as computer program code 153 and is executed by the one or more processors 152.
  • the one or more memories 155 and the computer program code 153 are configured to, with the one or more processors 152, cause the gNB 170 to perform one or more of the operations as described herein.
  • the one or more network interfaces 161 communicate over a network such as via the links 176 and 131.
  • Two or more gNBs 170 communicate using, e.g., link 176.
  • the link 176 may be wired or wireless or both and may implement, e.g., an X2 interface.
  • the one or more buses 157 may be address, data, or control buses, and may include any interconnection mechanism, such as a series of lines on a motherboard or integrated circuit, fiber optics or other optical communication equipment, wireless channels, and the like.
  • the one or more transceivers 160 may be implemented as a remote radio head (RRH) 195, with the other elements of the gNB 170 being physically in a different location from the RRH, and the one or more buses 157 could be implemented in part as fiber optic cable to connect the other elements of the gNB 170 to the RRH 195.
  • RRH remote radio head
  • the wireless network 100 may include a network control element (NCE) 190 that may include MME (Mobility Management Entity)/SGW (Serving Gateway) functionality, and which provides connectivity with a further network, such as a telephone network and/or a data communications network (e.g., the Internet).
  • NCE network control element
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • the gNB 170 is coupled via a link 131 to the NCE 190.
  • the link 131 may be implemented as, e.g., an SI interface.
  • the NCE 190 includes one or more processors 175, one or more memories 171, and one or more network interfaces (N/W I/F(s)) 180, interconnected through one or more buses 185.
  • the one or more memories 171 include computer program code 173.
  • the one or more memories 171 and the computer program code 173 are configured to , with the one or more processors 175 , cause the NCE 190 to perform one or more operations.
  • the wireless network 100 may implement network virtualization, which is the process of combining hardware and software network resources and network functionality into a single, software-based administrative entity, a virtual network. Network virtualization involves platform virtualization, often combined with resource virtualization.
  • Network virtualization is categorized as either external, combining many networks, or parts of networks, into a virtual unit, or internal, providing network- like functionality to software containers on a single system. Note that the virtualized entities that result from the network virtualization are still implemented, at some level, using hardware such as processors 152 or 175 and memories 155 and 171, and also such virtualized entities create technical effects.
  • the computer readable memories 125, 155, and 171 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, flash memory, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the computer readable memories 125, 155, and 171 may be means for performing storage functions.
  • the processors 120, 152, and 175 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture, as non- limiting examples.
  • the processors 120, 152, and 175 may be means for performing functions, such as controlling the UE 110, gNB 170, and other functions as described herein.
  • the various embodiments of the user equipment 110 can include, but are not limited to, cellular telephones such as smart phones, tablets, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, tablets with wireless communication capabilities, as well as portable units or terminals that incorporate combinations of such functions.
  • cellular telephones such as smart phones, tablets, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, tablets with wireless communication capabilities, as well as portable units or terminals that incorporate combinations of such functions.
  • PDAs personal digital assistants
  • portable computers having wireless communication capabilities
  • image capture devices such as digital cameras having wireless communication capabilities
  • gaming devices having wireless communication capabilities
  • music storage and playback appliances having wireless communication capabilities
  • Embodiments herein may be implemented in software (executed by one or more processors), hardware (e.g., an application specific integrated circuit), or a combination of software and hardware.
  • the software e.g., application logic, an instruction set
  • a "computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer, with one example of a computer described and depicted, e.g., in FIG. 1.
  • a computer-readable medium may comprise a computer-readable storage medium or other device that may be any media or means that can contain or store the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer.
  • the current architecture in LTE networks is fully distributed in the radio and fully centralized in the core network. The low latency requires bringing the content close to the radio which leads to local break out and multi-access edge computing (MEC).
  • MEC multi-access edge computing
  • 5G may use edge cloud and local cloud architecture.
  • Edge computing covers a wide range of technologies such as wireless sensor networks, mobile data acquisition, mobile signature analysis, cooperative distributed peer-to-peer ad hoc networking and processing also classifiable as local cloud/fog computing and grid/mesh computing, dew computing, mobile edge computing, cloudlet, distributed data storage and retrieval, autonomic self-healing networks, remote cloud services and augmented reality.
  • using edge cloud may mean node operations to be carried out, at least partly, in a server, host or node operationally coupled to a remote radio head or base station comprising radio parts. It is also possible that node operations will be distributed among a plurality of servers, nodes or hosts.
  • 5G NR MIMO may have different transmission schemes that include different reporting configurations. These may include close-loop scheme and open-loop scheme.
  • close-loop scheme may include close-loop scheme and open-loop scheme.
  • open-loop scheme may include close-loop scheme and open-loop scheme.
  • the processes described herein provides a CSI feedback solution that is decoupled from one fixed transmission scheme, and also determines feedback accuracy usage.
  • a single flexible CSI feedback solution provides maximum compatibility for various application scenarios.
  • a dual-codebook structure may be used, in which one long term precoding vector Wl and one short term precoding vector W2 may be reported to gNB 170 respectively.
  • the data precoding may be determined as
  • CQI feedback is based on selected Wl and W2.
  • one CQI is calculated based on one complete codebook W1 *W2 combination.
  • the CQI feedback may be different, where CQI calculation is implemented either including a large code division duplex (CDD) based precoding cycling or including transmission diversity.
  • CDD code division duplex
  • the CSI feedback may be different and independent. Consequently, multiple transmission scheme and multiple CQI hypotheses may coexist.
  • RE resource element
  • the data precoding may be determined as:
  • PMI reporting may reuse Wl feedback, which is similar with close-loop transmission, but W2 reporting may not be required/used (or needed).
  • Wl feedback For CQI calculation, one fixed Wl and predefined cycled W2 may be used.
  • this scheme still provides independent CSI feedback with close-loop feedback.
  • two separate CSI feedback modes may be required to support close-loop and open-loop transmission.
  • open-loop and close-loop transmission may apply a two-stage principle, in which one stage is based on Wl reporting, and another stage is transmitted based on W2 reporting.
  • codebook design for type 1 codebook
  • precoding cycling may be an option, which may require precoding cycling in physical resource block (PRB) or RE level.
  • PRB physical resource block
  • the example embodiments provide a single flexible and unified CSI feedback arrangement to support multiple transmission scheme and multiple feedback accuracy requirement.
  • the single flexible and unified CSI feedback arrangement may be used for close- loop and open-loop, in which the CSI feedback is self-contained and independent.
  • the single flexible and unified CSI feedback arrangement may allow systems to add one CSI feedback component without significant change to CSI feedback framework in instances in which improved CSI feedback accuracy is to be implemented.
  • Referring to Fig. 2 an example embodiment 200 is shown of gNB indication signaling.
  • each feedback configuration may include Wl reporting 210 (long term beam information), W2 reporting 220 (short term information) and/or high resolution CSI 230.
  • Check marks in each row indicate whether Wl 210, W2 220 and/or high resolution CSI 230 are included in each bits indication.
  • additional configuration parameters may be added, for example indicating how many beam or how many codebook, while preserving the framework.
  • the example embodiments provide one flexible feedback configuration with multiple CSI components from one predefined CSI pool to fit for different transmission schemes.
  • the CSI feedback framework may (firstly) include creating/generating one CSI component pool and dynamically indicating UE 110 to report CSI set from this CSI pool.
  • the CSI feedback framework may (secondly) further include the UE 110 autonomously triggering new CSI component feedback request through uplink scheduling request (UL SR) or PRACH signal.
  • the gNB 170 (or other network device) may generate a single (for example, one) CSI component pool and dynamically indicate UE 110 to report CSI set from this CSI pool.
  • the CSI component pool may be formed by multiple level CSI accuracy and configured by RRC signaling, at least including: 1. one long term codebook set to represent beam direction, 2.
  • the UE 110 may be indicated to report required CSI component combination from the defined CSI pool with MAC control element (CE) or downlink control information (DCI).
  • CE MAC control element
  • DCI downlink control information
  • the example embodiment may determine one unified signaling format to indicate CSI component reporting based on a predefined CSI pool.
  • the CSI feedback solution may include enabling UE 110 to report multiple CQI independently with CSI component feedback.
  • the CSI feedback solution may further include indicating a UE 110 to report one additional CSI component on top of available CSI configuration in an aperiodic manner.
  • the CSI feedback solution may include operations to enable CSI reporting dynamic switching.
  • gNB 170 may require the reporting of one long term feedback Wl and one short term feedback W2. If open-loop transmission is used, only long term feedback Wl may be reported. For multiple panel case, in additional to single panel feedback Wl and W2, inter-panel co-phasing feedback W2' may be reported. If multiple beam combination feedback is required, then Wl may cover multiple beam indexes, and W2 may cover multiple beam combination coefficients. In instances in which high resolution feedback is to be reported, then the covariance matrix or Eigen-vector based feedback may be required.
  • UE 110 may be indicated to report partial channel CSI with quantized covariance matrix to gNB 170. If high resolution feedback for multiple total radiated power (TRP) case, UE 110 may report the covariance matrix of one TRP and co-phasing information of inter- TRP. Hybrid feedback reporting may be configured by combining Wl feedback with high resolution covariance matrix. In this case the W can serve as a quantization metric for the covariance matrix (as shown in Fig. 2 at 202-6). If one close-loop reporting is configured, then one additional CQI associated with open-loop transmission may be configured to report in an aperiodic manner.
  • TDD time division duplex
  • CSI reporting mode When one CSI reporting mode is configured, if UE 110 determines that channel condition have changed (for example, via messaging received from other network devices or by measurement), UE 110 may trigger one CSI request to report new CSI component [0036] Based on application of the above configurations, CSI reporting mode may be implemented in a flexible manner (for example, in instances of close-loop and/or open-loop transmission).
  • the CSI reporting framework may specify one complete CSI component pool, and provides a CSI feedback mechanism that is unified and scalable. [0037] In the second part of the CSI feedback framework, the UE 110 may autonomously trigger new CSI component feedback requests through UL SR or PRACH signal.
  • UE 110 may trigger (at least) one request to change the CSI reporting. For example, in instances in which UE 110 is configured for Wl reporting only, if the SINR condition improves (for example, becomes better), UE 110 may send one scheduling request or PRACH signal to inform gNB 170 to request new CSI W2 reporting. After gNB 170 has confirmed (for example, provided a confirmation message), UE 110 may report the new CSI component set.
  • SINR signal-to-interference-plus-noise ratio
  • UE 110 may trigger (at least) one request to change the CSI reporting. For example, in instances in which UE 110 is configured for Wl reporting only, if the SINR condition improves (for example, becomes better), UE 110 may send one scheduling request or PRACH signal to inform gNB 170 to request new CSI W2 reporting. After gNB 170 has confirmed (for example, provided a confirmation message), UE 110 may report the new CSI component set.
  • CSI reporting may be implemented based on defining a first CSI feedback component 1 , defining a second CSI feedback component 2 and defining a high resolution based feedback component 3 :
  • the network may define the (first) CSI feedback component 1 to include long term feedback Wl (210).
  • Wl 210 may comprise multiple finer beam basis (for example, multiple beams in Wl).
  • These first feedback components may be transmitted independently on PUCCH.
  • Wl 210 may
  • L is beam number within one beam group.
  • the network device may define the (second) CSI feedback component 2 to include short term feedback W2 (220).
  • Short term feedback W2 220 may comprise multiple co-phasing coefficients and/or include beam selection.
  • This feedback component may be transmitted independently on PUCCH if wideband W2 220 is used, or may be transmitted on PUSCH or MAC control element (CE) and encoded with Wl 210 beams if frequency selective reporting is used.
  • W2 220 may be defined as beam selection and co-phasing from L-beam based Wl 210.
  • the network device may define the high resolution based feedback component
  • High resolution CSI feedback may require more CSI feedback overhead.
  • high resolution CSI feedback may be carried by PDSCH.
  • a channel covariance matrix may be calculated and quantized per element.
  • eigen- vector feedback of channel matrix one or multiple eigen- vectors may be quantized.
  • CSI feedback component 1 and component 2 may both be reported (for example, used) from the UE 110 to gNB 170.
  • the UE 110 may report only the CSI feedback component 1.
  • UE 110 may report one direct quantization CSI information with CSI component 3.
  • UE 110 may use per element based channel covariance matrix or eigen- vector quantization.
  • the high resolution feedback such as covariance or eigenvector based feedback, may utilize quantization rules, or other indication which may lead to reduced computation complexity and lower overhead. Such indication may be signalled by (or based on) Wl which may comprise of the quantization rules to be applied for the high resolution feedback.
  • additional bits may be used.
  • bits indication 202 may indicate a CSI component, such as 000 open- loop 202-0 (which may include Wl, long term beam information), 001 closed-loop 202-1 (which may include Wl, and W2 short term co -phasing information), 010 multiple panel feedback 202-2 (which may include Wl, and W2, where W21 is for intra-panel and W22 is for inter-panel), 011 multiple beam basis close-loop 202-3 (which may include Wl, where Wl is for multiple beam reporting and W2, where W2 is for multiple beam coordination), 100 high resolution 1 202-4 (which may include high resolution CSI 230 with covariance matrix quantization), 101 high resolution 2 202-5 (which may include high resolution CSI 230 with eigen- vector quantization), or 110 high resolution CSI 230 with quantization rules defined by Wl 210.
  • Bits indication 111 202-7 may be reserved for other configurations.
  • Fig. 3 is an example flow diagram 300 illustrating a CSI feedback process.
  • gNB 170 may define a channel status information (CSI) component pool based on multiple level CSI accuracy, wherein the CSI component pool includes a long term code book set representing beam direction, a short term codebook set representing co-phasing information and direct channel quantization information.
  • the short term codebook set may include two kinds of subsets, a subset for intra-panel, and a subset for inter-panel or inter-TRP. Depending the use case, intra-panel and inter-panel/inter- TRP maybe used jointly or separately.
  • the direct channel quantization information may be by covariance matrix quantization or eigen-vector quantization.
  • gNB 170 may configure the CSI component pool based on Radio Resource Control (RRC) signalling.
  • RRC Radio Resource Control
  • gNB 170 may provide an indication to
  • UE 110 may autonomously trigger new
  • CSI component feedback request through UL SR or PRACH signal.
  • UE 110 may trigger a request to change the CSI reporting. For example, when UE 110 is configured with Wl reporting only, if the SINR condition becomes better, UE 110 may send one scheduling request or PRACH signal to inform gNB 170 to request new CSI W2 reporting. After gNB 170 confirms, UE 110 may report new CSI component set.
  • a technical effect of one or more of the example embodiments disclosed herein is that 5G NR CSI feedback process described herein may provide expanded flexibility, in which CSI feedback framework is unified and scalable. Another technical effect of one or more of the example embodiments disclosed herein is that the UE may be allowed to trigger new CSI reporting request according to UE determination (for example, judgement). Another technical effect of one or more of the example embodiments disclosed herein is that when one new transmission scheme or one new CSI accuracy is required, the process requires only adding or selecting the CSI components, and avoids changing total CSI reporting framework.
  • An example embodiment may provide a method comprising defining a channel status information (CSI) component pool based on multiple level CSI accuracy, wherein the CSI component pool comprises a plurality of CSI components; configuring the CSI component pool via Radio Resource Control (RRC) signalling; and providing an indication to at least one user device to report a CSI component combination from the CSI component pool.
  • CSI channel status information
  • the plurality of CSI components includes at least one of a long term code book set representing beam direction, a short term codebook set representing co-phasing information and direct channel quantization information.
  • the short term codebook set includes at least one of an intra-panel subset, and an inter-panel subset.
  • the direct channel quantization information includes at least one of covariance matrix quantization and eigen- vector quantization.
  • indicating the user device to report the CSI component combination further comprises indicating the user device to report the CSI component combination using at least one of Medium access control (MAC) control element (CE) or downlink control information (DCI).
  • MAC Medium access control
  • CE control element
  • DCI downlink control information
  • enabling the at least one user device to report multiple channel quality indicator (CQI) independently with CSI component feedback.
  • CQI channel quality indicator
  • receiving the request from the at least one user device to change the CSI component combination further comprises receiving the request from the at least one user device to change the CSI component combination in response to a change in a channel environment based on at least one of a signal-to-interference-plus-noise ratio (SINR) and a user device mobile speed.
  • SINR signal-to-interference-plus-noise ratio
  • an initial CSI component combination include only the long term code book set further comprising: receiving the request from the at least one user device to change the CSI component combination to include the short term codebook set.
  • An example embodiment may be provided in an apparatus comprising at least one processor; and at least one non-transitory memory including computer program code, the at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus to: receive a configuration of a (channel status information) CSI component pool via Radio Resource Control (RRC) signalling; and receive an indication used for reporting a CSI component combination from the CSI component pool; wherein the CSI component pool comprises at least one of a long term code book set representing beam direction, a short term codebook set representing co-phasing information and direct channel quantization information.
  • RRC Radio Resource Control
  • An example embodiment may be provided in an apparatus comprising at least one processor; and at least one non-transitory memory including computer program code, the at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus to: define a channel status information (CSI) component pool based on multiple level CSI accuracy, wherein the CSI component pool includes a long term code book set representing beam direction, a short term codebook set representing co- phasing information and direct channel quantization information, configure the CSI component pool based on Radio Resource Control (RRC) signalling, and provide an indication to at least one user device to report a CSI component combination from the CSI component pool.
  • RRC Radio Resource Control
  • a non-transitory computer program product comprising a computer-readable medium bearing computer program code embodied therein for use with a computer, the computer program code comprising code for defining a channel status information (CSI) component pool based on multiple level CSI accuracy, wherein the CSI component pool includes a long term code book set representing beam direction, a short term codebook set representing co-phasing information and direct channel quantization information, configuring the CSI component pool based on Radio Resource Control (RRC) signalling, and providing an indication to at least one user device to report a CSI component combination from the CSI component pool.
  • RRC Radio Resource Control
  • an example apparatus comprises: means for defining a channel status information (CSI) component pool based on multiple level CSI accuracy, wherein the CSI component pool includes a long term code book set representing beam direction, a short term codebook set representing co-phasing information and direct channel quantization information, means for configuring the CSI component pool based on Radio Resource Control (RRC) signalling, and means for providing an indication to at least one user device to report a CSI component combination from the CSI component pool.
  • RRC Radio Resource Control
  • Embodiments herein may be implemented in software (executed by one or more processors), hardware (e.g., an application specific integrated circuit), or a combination of software and hardware.
  • the software e.g., application logic, an instruction set
  • a "computer-readable medium” may be any media or means that can contain, store, communicate, propagate or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer, with one example of a computer described and depicted, e.g., in Fig. 1.
  • a computer-readable medium may comprise a computer-readable storage medium (e.g., memories 125, 155, 171 or other device) that may be any media or means that can contain, store, and/or transport the instructions for use by or in connection with an instruction execution system, apparatus, or device, such as a computer.
  • a computer-readable storage medium does not comprise propagating signals.
  • the different functions discussed herein may be performed in a different order and/or concurrently with each other. Furthermore, if desired, one or more of the above-described functions may be optional or may be combined.
  • the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof.
  • some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto.
  • firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto.
  • While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • Embodiments may be practiced in various components such as integrated circuit modules.
  • the design of integrated circuits is by and large a highly automated process. Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.
  • the word "exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any embodiment described herein as "exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described in this Detailed Description are exemplary embodiments provided to enable persons skilled in the art to make or use the invention and not to limit the scope of the invention which is defined by the claims.
  • the coupling or connection between the elements can be physical, logical, or a combination thereof.
  • two elements may be considered to be “connected” or “coupled” together by the use of one or more wires, cables and/or printed electrical connections, as well as by the use of electromagnetic energy, such as electromagnetic energy having wavelengths in the radio frequency region, the microwave region and the optical (both visible and invisible) region, as several non-limiting and non- exhaustive examples.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des systèmes, des procédés, des appareils et des produits-programmes informatiques permettant de fournir un retour d'informations d'état de canal (CSI) flexible et unifié pour prendre en charge un schéma de transmission multiple et de multiples exigences de précision de retour d'informations. Un procédé consiste à définir un groupe de composants de CSI comprenant une pluralité de composants de CSI sur la base d'une précision de CSI à plusieurs niveaux, à configurer le groupe de composants de CSI via une signalisation de commande de ressources radio (RRC), et à fournir à au moins un dispositif utilisateur une indication pour notifier une combinaison de composants de CSI du groupe de composants de CSI.
PCT/FI2018/050291 2017-05-05 2018-04-24 Procédé de retour d'informations csi WO2018202942A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762502166P 2017-05-05 2017-05-05
US62/502,166 2017-05-05

Publications (1)

Publication Number Publication Date
WO2018202942A1 true WO2018202942A1 (fr) 2018-11-08

Family

ID=62148397

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2018/050291 WO2018202942A1 (fr) 2017-05-05 2018-04-24 Procédé de retour d'informations csi

Country Status (1)

Country Link
WO (1) WO2018202942A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113115415A (zh) * 2020-01-10 2021-07-13 华为技术有限公司 通信方法及装置
WO2023224380A1 (fr) * 2022-05-18 2023-11-23 Samsung Electronics Co., Ltd. Procédé et appareil permettant de transmettre un signal de commande dans un système de communication sans fil

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3046271A1 (fr) * 2015-01-16 2016-07-20 Samsung Electronics Co., Ltd. Procédé et appareil pour fd-mimo à rétroaction réduite

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3046271A1 (fr) * 2015-01-16 2016-07-20 Samsung Electronics Co., Ltd. Procédé et appareil pour fd-mimo à rétroaction réduite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113115415A (zh) * 2020-01-10 2021-07-13 华为技术有限公司 通信方法及装置
CN113115415B (zh) * 2020-01-10 2023-11-10 华为技术有限公司 通信方法及装置
WO2023224380A1 (fr) * 2022-05-18 2023-11-23 Samsung Electronics Co., Ltd. Procédé et appareil permettant de transmettre un signal de commande dans un système de communication sans fil

Similar Documents

Publication Publication Date Title
US11689255B2 (en) Wireless communication system, and device and method in wireless communication system
US9369849B2 (en) Three-dimensional beamforming in a mobile communications network
US11115097B2 (en) Adaptive explicit CSI feedback and overhead reduction
CN109120313B (zh) 一种秩指示上报方法和装置、指示方法和装置
JP2018532290A (ja) プリコーディング情報を送信し、且つプリコーディング情報をフィードバックするための方法及び装置
US11196522B2 (en) Enhanced sounding reference signal scheme
KR102634411B1 (ko) 전자 장치, 무선 통신 방법, 및 컴퓨터 판독가능 매체
WO2018202942A1 (fr) Procédé de retour d'informations csi
WO2016107804A1 (fr) Signalisation de rétroaction d'informations d'état de canal (csi) multi-rang efficace
US10469135B2 (en) Transmission control methods and transmission control apparatus
CN111418162B (zh) 利用参考权重向量的ue特定的波束映射
US10979201B2 (en) Method for configuring data resource mapping information, base station, and terminal
US11723116B2 (en) Electronic device for performing precoding and method for operating the same
CN115882909A (zh) 预编码方式的指示方法、装置、终端及网络侧设备
CN112602269B (zh) 一种上行数据传输的预编码指示方法及相关设备
WO2020056650A1 (fr) Détection de poids de rétroaction assistée par réseau destinée à un précodage non-linéaire
CN108400804B (zh) 一种上行数据传输方法、终端和网络侧设备
WO2020015874A1 (fr) Exploitation d'une corrélation d'antennes réceptrices dans un système de rétroaction de csi fondé sur la compression spatiale
WO2022226885A1 (fr) Procédés, dispositifs et supports de stockage informatique pour la communication
WO2024092666A1 (fr) Procédés, dispositifs et support de communication
WO2018082380A1 (fr) Procédé de notification et de détermination de capacité, dispositif terminal et dispositif d'accès
CN116614162A (zh) 预编码指示方法、装置、通信设备、系统及存储介质
CN118074870A (zh) 信息确定方法、装置及通信设备
CN116418378A (zh) 一种预编码指示方式的确定方法和装置
KR20170017101A (ko) 사용자 구분 레퍼런스 신호 기반의 전송 다이버시티 방법

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18723892

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18723892

Country of ref document: EP

Kind code of ref document: A1