WO2020058562A1 - Extensions de parties de bande passante - Google Patents

Extensions de parties de bande passante Download PDF

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Publication number
WO2020058562A1
WO2020058562A1 PCT/FI2018/050680 FI2018050680W WO2020058562A1 WO 2020058562 A1 WO2020058562 A1 WO 2020058562A1 FI 2018050680 W FI2018050680 W FI 2018050680W WO 2020058562 A1 WO2020058562 A1 WO 2020058562A1
Authority
WO
WIPO (PCT)
Prior art keywords
bandwidth part
bandwidth
radio channel
network apparatus
predetermined signal
Prior art date
Application number
PCT/FI2018/050680
Other languages
English (en)
Inventor
Wolfgang Zirwas
Mihai Enescu
Lars Dalsgaard
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
Priority to EP18934323.9A priority Critical patent/EP3854156A4/fr
Priority to PCT/FI2018/050680 priority patent/WO2020058562A1/fr
Publication of WO2020058562A1 publication Critical patent/WO2020058562A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/373—Predicting channel quality or other radio frequency [RF] parameters
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/022—Channel estimation of frequency response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H04B17/327—Received signal code power [RSCP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • 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
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • At least some embodiments address a problem of how to enhance the BWP framework so that more advanced multi TRP JT CoMP schemes can be supported, for example for efficient estimation of relevant channel components or for close to optimum channel estimation, possibly including the support of channel prediction.
  • bandwidth parts of a radio channel according to a bandwidth part concept in which user equipments are active only in one single bandwidth part at a time
  • the at least one memory and the computer program code are configured to, with the at least one processor, cause the network apparatus to further perform :
  • a UE After having calculated the BWP indicator IBWP, a UE reports values of the IBWP per relevant radio channel component or per beam to a gNB with which the UE communicates. According to an implementation example, the reporting is performed using a table so that for example an IBWP value of ⁇ ' indicates a bandwidth of 6 PRBs, '2' indicates 12 PRBs, '3' indicates 24 PRBs, and '4' indicates a full bandwidth over all PRBs.
  • Fig. 3 shows a flowchart illustrating a process 1 according to an example embodiment.
  • Process 1 shown in Fig. 3 may be performed by a user equipment (e.g. the above-mentioned UE) of a communication system applying the BWP concept.
  • a user equipment e.g. the above-mentioned UE
  • a corresponding normalized mean square error (NMSE) for the CSI estimation and the possible bandwidths may be predefined or standardized or set by corresponding RRC messages between the network apparatus and the user equipment.
  • NMSE normalized mean square error
  • a first adapted configured bandwidth part with a first bandwidth determined by the bandwidth part indicator wherein the first adapted configured bandwidth part is configured in a lower frequency band of the radio channel
  • a second adapted configured bandwidth part with a second bandwidth determined by the bandwidth part indicator wherein the second adapted configured bandwidth part is configured in an upper frequency band of the radio channel are alternately activated over time.
  • first characteristics of the predetermined signal over a first physical resource block of the first adapted configured bandwidth part are estimated.
  • second characteristics of the predetermined signal over a first physical resource block of the first adapted configured bandwidth part are estimated.
  • coordinated reference signals for channel state information are received from the at least one network apparatus.
  • a first adapted bandwidth part with a first bandwidth determined by the bandwidth part indicator is configured at the network apparatus site.
  • a second adapted bandwidth part with a second bandwidth determined by the bandwidth part indicator is configured.
  • the predetermined signal is transmitted over a first physical resource block of the first adapted bandwidth part
  • the predetermined signal is transmitted over a second physical resource block of the second adapted bandwidth part
  • the predetermined signal is transmitted over a third physical resource block of the first adapted bandwidth part.
  • this pattern is repeated so that a channel tracking and periodic reporting is possible.
  • this example implementation may be combined with channel prediction.
  • the NR BWP framework may enable such fast BWP switching by according DCI messages. Nonetheless, according to an example
  • a multi TRP mode like inter site JT CoMP is considered, where the BWPs of the beams of multiple cells and sites are switched in a harmonized way, for example with the goal to support multi TRP accurate CSI estimation for all relevant channel components with moderate - or even minimum possible - overhead.
  • UEs use a large BWP bandwidth and beams from cells or antenna ports use certain subsets of the overall frequency bandwidth so that at one time instance for example simultaneously three beams can be measured per UE and each UE can estimate the RSRP power for these three beams.
  • the UE - receiving over the large bandwidth part bandwidth - will do separate estimations for the smaller bandwidth subsets in parallel and independently between the subsets.
  • the estimation quality will be similar to the case when doing an estimation over the full bandwidth for each beam sequentially. That way, a significant overhead saving for example with respect to CSI reference signals will be possible.
  • a configured bandwidth part comprises at least two subsets of the overall frequency bandwidth of the configured bandwidth part, wherein a subband bandwidth of the at least two subsets is determined by the bandwidth part indicator for at least two different beams corresponding to the at least two subsets.
  • support of channel estimation and prediction over a frequency-band of maximum size despite a relatively small BWP configuration is provided. This enables trade-offs between the Fisher information - which would be optimal for the maximum possible estimation bandwidth - and a low BWP bandwidth, with accordingly lower power consumption and lower resource usage.
  • required bandwidth for estimation of relevant channel components (CC) or beams is minimized. For example, for a multi TRP cooperation area over nine cells, there may be up to 288 possible beams and in a first step the relevant beams have to be identified per UE.
  • One option to estimate the relevant channel components is to rely on channel reciprocity and to estimate the UL power for all beams based on SRS
  • the BWPs size per UE can be suitably adapted to the channel characteristics.
  • At least some embodiments support fast scheduling by inter band CSI interpolation or prediction. For that purpose, most upper and lower BWPs are combined for the best frequency interpolation performance.
  • BWPs are configured, e.g. by a network apparatus of a communication system, for a single or for upper and lower frequency bands.
  • the size of the BWP(s) is adapted e.g. by the network apparatus so that it fits to the channel characteristic of the intended channel components.
  • the network apparatus e.g. gNB, switches upper and lower BWPs in a fast and predefined manner, coordinated over multiple sites and cells as shown in Fig. 5 and transmits corresponding predefined CSI information (also referred to here as predetermined signal) per beam.
  • predefined CSI information also referred to here as predetermined signal
  • the UEs estimate CSI per BWP and interpolate between two lower BWPs over time so that CSI for upper and lower BWP can be combined, despite the fact that at any time instance there is only one BWP active.
  • the UEs report estimated and interpolated CSI to the gNB, which may use it, e.g., for MU MIMO, JT CoMP, NL precoding or other advanced transmission schemes.
  • the gNB may use the interpolated CSI to estimate CQI and other values needed for flexible scheduling in any other frequency subband or BWP.
  • the bandwidth part indicator IBWP enables a fine granular adaptation of the gNB Tx- and UE Rx bandwidth to the channel characteristics as well as to certain load conditions or other relevant criteria. This can be used to improve energy efficiency for measurements like RSRP per beam or CSI estimations, with or without additional interpolation over frequency and/or time.
  • multiple CSI for multiple beams can be multiplexed in multiple parallel frequency subbands or BWPs.
  • the proposed lower and upper BWP switching pattern maximizes the Fisher information for channel estimation due to maximum 'effective' bandwidth, which results in significantly improved CSI estimation quality.
  • This combined estimation for a lower and upper BWP is especially well suited for the parameter estimation concepts like the CIR profiling as a parameter mismatch in one BWP will generally lead to a strong CSI error in the other BWP. It is noted that for certain CIR constellations an additional BWP in the middle of the overall frequency band may be useful. According to an example
  • this is part of a further enhanced BWP indicator reporting.
  • the predefined BWP switching enables an accurate interpolation between BWPs despite there is only a single BWP per time slot active.
  • Using a predefined switching pattern causes a minimum extra control overhead.
  • Two predefined estimation instances allow to estimate the CSI evolution over time and accordingly the MPC evolution. Based on this, an accurate prediction of the MPC parameters becomes possible.
  • the CSI interpolation in frequency direction enables fast switching into other BWPs as it avoids the otherwise needed extra steps of CSI estimation and reporting as well as scheduling in the newly activated BWP. This reduces the BWP switching time to that of the RF part switching time, which can be very low.
  • the BWP indicator is used for DL CSI RSs as well as for UL SRS signals due to the channel reciprocity.
  • FIG. 7 illustrating a simplified block diagram of various electronic devices that are suitable for use in practicing at least some embodiments.
  • Fig. 7 shows a control unit 10 comprising processing resources (e.g.
  • processing circuitry 11, memory resources (e.g. memory circuitry) 12, and interfaces (e.g. interface circuitry) 13, which are coupled via a link 14.
  • memory resources e.g. memory circuitry
  • interfaces e.g. interface circuitry
  • control unit 10 executes process 1 shown in Fig. 3.
  • control unit 10 is part of and/or is used by a user equipment of a communication system applying the BWP concept.
  • the memory resources 12 may store a program that is executed by the processing resources 11.
  • the interfaces 13 may comprise a suitable radio frequency (RF) transceiver coupled to one or more antennas for bidirectional wireless communications over one or more wireless links 33 with a control unit
  • RF radio frequency
  • the transceiver includes both transmitter and receiver, and inherent in each is a modulator/demodulator commonly known as a modem.
  • various embodiments of the user equipment can include, but are not limited to, mobile stations, cellular telephones, 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, 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
  • Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • the control unit 20 comprises processing resources (e.g. processing circuitry)
  • memory resources e.g. memory circuitry
  • interfaces e.g.
  • control unit 20 executes process 2 shown in Fig. 4.
  • control unit 20 is part of and/or is used by a network apparatus of the communication system applying the BWP concept.
  • the memory resources 22 may store a program that is executed by the processing resources 21.
  • the interfaces 23 may comprise a suitable radio frequency (RF) transceiver coupled to one or more antennas for bidirectional wireless communications over the one or more wireless links 33 with the control unit 10.
  • RF radio frequency
  • the transceiver includes both transmitter and receiver, and inherent in each is a modulator/demodulator commonly known as a modem.
  • connection or coupling either direct or indirect, between two or more elements, and may encompass the presence of one or more intermediate elements between two elements that are “connected” or “coupled” together.
  • 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 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 non-limiting examples.
  • the programs stored in the memory resources 12, 22 are assumed to include program instructions that, when executed by the associated processing resources 11, 21, enable the electronic device to operate in accordance with at least some embodiments and example implementations, as detailed above.
  • Inherent in the processing resources 11, 21 is a clock to enable synchronism among the various apparatus for transmissions and receptions within the appropriate time intervals and slots required, as the scheduling grants and the granted resources/subframes are time dependent.
  • example embodiments may be implemented by computer software stored in the memory resources 12, 22 and executable by the processing resources 11, 21, or by hardware, or by a combination of software and/or firmware and hardware in any or all of the devices shown.
  • the memory resources 12, 22 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, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.
  • the processing resources 11, 21 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.
  • circuitry refers to one or more or all of the following :
  • processor(s)/software including digital signal processor(s)
  • software including digital signal processor(s)
  • software including digital signal processor(s)
  • memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions
  • circuits such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
  • circuitry applies to all uses of this term in this application, including in any claims.
  • circuitry would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware.
  • circuitry would also cover, for example and if applicable to the particular claim element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in server, a cellular network device, or other network device.
  • a user equipment which comprises means for estimating channel characteristics of at least one radio channel component or beam received by the user equipment from at least one network apparatus over at least one configured bandwidth part of a radio channel, means for, based on the estimated channel characteristics,
  • the channel characteristics comprise multi path component parameters.
  • the user equipment further comprises means for estimating characteristics of the predetermined signal received by the user equipment over at least one adapted configured bandwidth part with a bandwidth determined by the bandwidth part indicator, means for, based on the estimated characteristics, reconstructing a transfer function of the radio channel with a bandwidth larger than that of the adapted configured
  • a configured bandwidth part comprises at least two subsets of the overall frequency bandwidth of the configured bandwidth part, wherein a subband bandwidth of the at least two subsets is determined by the bandwidth part indicator for at least two different beams or antenna ports corresponding to the at least two subsets.
  • the means for estimating comprises means for alternately activating over time, a first adapted configured bandwidth part with a first bandwidth determined by the bandwidth part indicator, wherein the first adapted configured bandwidth part is configured in a lower frequency band of the radio channel, and a second adapted configured bandwidth part with a second bandwidth determined by the bandwidth part indicator, wherein the second adapted configured bandwidth part is configured in an upper frequency band of the radio channel, means for, at a first time instance, estimating first characteristics of the predetermined signal over a first physical resource block of the first adapted configured bandwidth part, at a second time instance, estimating second characteristics of the
  • predetermined signal over a second physical resource block of the second adapted configured bandwidth part, at a third time instance, estimating third characteristics of the predetermined signal over a third physical resource block of the first adapted configured bandwidth part; and interpolating fourth characteristics of the predetermined signal over the second physical resource block of the first adapted configured bandwidth part by using the first and third characteristics of the predetermined signal, and the means for
  • the user equipment comprises means for receiving coordinated reference signals for channel state information from the at least one network apparatus by using the first to third physical resource blocks.
  • the user equipment comprises means for executing process 1 shown in Fig. 3.
  • the above-described means of the user equipment are implemented by the processing resources 11, the memory resources 12 and the interfaces 13 of the control unit 10.
  • a network apparatus which comprises means for configuring bandwidth parts of a radio channel according to a bandwidth part concept in which user equipments are active only in one single bandwidth part at a time, means for receiving, from a user equipment, a bandwidth part indicator indicating an estimated required bandwidth for each of at least one radio channel component or beam used by the user equipment for communicating with the network apparatus, wherein the estimated required bandwidth is required to estimate, with a predetermined reliability, characteristics of a predetermined signal, and means for adapting the configured bandwidth parts of the radio channel based on the received bandwidth part indicator.
  • the network apparatus further comprises means for configuring, for a beam or an antenna port, a subset of the overall frequency bandwidth of a configured bandwidth part, wherein a subband bandwidth of the subset is determined by the bandwidth part indicator for the beam.
  • the network apparatus further comprises means for configuring, in a lower frequency band of the radio channel, a first adapted bandwidth part with a first bandwidth determined by the bandwidth part indicator, and configuring, in an upper frequency band of the radio channel, a second adapted bandwidth part with a second bandwidth determined by the bandwidth part indicator, and means for, at a first time instance, transmitting the predetermined signal over a first physical resource block of the first adapted bandwidth part, at a second time instance,
  • the network apparatus further comprises means for transmitting coordinated reference signals for channel state information by using the first to third physical resource blocks.
  • the coordinated reference signals comprise channel state information reference signals.
  • the bandwidth part indicator is reported using a table relating numbers of physical resource blocks to values.
  • the characteristics comprise channel state information.
  • the user equipment further comprises means for receiving configuration of bandwidth parts, configuration of a switching pattern defining alternate activation of configured bandwidth parts, configuration of reference signals, and amounts of at least one of a
  • predetermined power, predetermined reliability and predetermined error from the at least one network apparatus.
  • the network apparatus further comprises means for transmitting configuration of bandwidth parts,
  • configuration of a switching pattern defining alternate activation of configured bandwidth parts, configuration of reference signals, and amounts of at least one of a predetermined power, predetermined reliability and predetermined error to the user equipment.
  • configuration and amounts are communicated using at least one of dedicated radio resource control signaling, downlink control information and a message including a control element of medium access control.
  • channel characteristics of a radio channel component or beam received by a user equipment from a network apparatus over at least one configured bandwidth part of a radio channel are estimated. Based on the estimated channel characteristics, a required bandwidth is estimated, which is required to estimate, with a predetermined reliability, characteristics of a predetermined signal.
  • a bandwidth part indicator is reported to the network apparatus, which indicates the estimated required bandwidth for the radio channel component or beam received by the user equipment from the network apparatus.
  • the network apparatus may adapt configured bandwidth parts of the radio channel based on the received bandwidth part indicator.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des caractéristiques de canal d'une composante ou d'un faisceau de canal radio reçu(e) par un équipement d'utilisateur en provenance d'un appareil de réseau sur au moins une partie de bande passante configurée d'un canal radio sont estimées (S30). Sur la base des caractéristiques de canal estimées, une bande passante requise est estimée (S32), qui est nécessaire pour estimer, avec une fiabilité prédéterminée, des caractéristiques d'un signal prédéterminé. Un indicateur de partie de bande passante est signalé (S34) à l'appareil de réseau, qui indique la bande passante requise estimée pour la composante ou le faisceau de canal radio reçu(e) par l'équipement d'utilisateur en provenance de l'appareil de réseau. L'appareil de réseau peut adapter des parties de bande passante configurées du canal radio sur la base du l'indicateur reçu de partie de bande passante.
PCT/FI2018/050680 2018-09-21 2018-09-21 Extensions de parties de bande passante WO2020058562A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18934323.9A EP3854156A4 (fr) 2018-09-21 2018-09-21 Extensions de parties de bande passante
PCT/FI2018/050680 WO2020058562A1 (fr) 2018-09-21 2018-09-21 Extensions de parties de bande passante

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Application Number Priority Date Filing Date Title
PCT/FI2018/050680 WO2020058562A1 (fr) 2018-09-21 2018-09-21 Extensions de parties de bande passante

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WO2020058562A1 true WO2020058562A1 (fr) 2020-03-26

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016115654A1 (fr) * 2015-01-19 2016-07-28 Qualcomm Incorporated Réduction du surdébit de retour d'informations de csi pour systèmes fd-mimo
US20170126439A1 (en) * 2014-04-28 2017-05-04 Sharp Kabushiki Kaisha Base station apparatus and transmission method
CN107872891A (zh) * 2017-11-14 2018-04-03 宇龙计算机通信科技(深圳)有限公司 资源调度方法、装置、网络设备及终端
US20180183551A1 (en) * 2016-12-27 2018-06-28 Chie-Ming Chou Method for signaling bandwidth part (bwp) indicators and radio communication equipment using the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170126439A1 (en) * 2014-04-28 2017-05-04 Sharp Kabushiki Kaisha Base station apparatus and transmission method
WO2016115654A1 (fr) * 2015-01-19 2016-07-28 Qualcomm Incorporated Réduction du surdébit de retour d'informations de csi pour systèmes fd-mimo
US20180183551A1 (en) * 2016-12-27 2018-06-28 Chie-Ming Chou Method for signaling bandwidth part (bwp) indicators and radio communication equipment using the same
CN107872891A (zh) * 2017-11-14 2018-04-03 宇龙计算机通信科技(深圳)有限公司 资源调度方法、装置、网络设备及终端

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Technical Specification Group Radio Access Network; NR; Physical layer procedures for data (Release 15", 3GPP TS 38.214, 29 June 2018 (2018-06-29), XP051454110, Retrieved from the Internet <URL:https://www.3gpp.org/ftp/Specs/2018-06/Rel-15/38_series/38214-f20.zip> [retrieved on 20190611] *
See also references of EP3854156A4 *

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EP3854156A4 (fr) 2022-05-25

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