WO2013113975A1 - Signalisation de caractéristiques de brouillage de symboles de référence pour des récepteurs avancés d'ue - Google Patents

Signalisation de caractéristiques de brouillage de symboles de référence pour des récepteurs avancés d'ue Download PDF

Info

Publication number
WO2013113975A1
WO2013113975A1 PCT/FI2012/050104 FI2012050104W WO2013113975A1 WO 2013113975 A1 WO2013113975 A1 WO 2013113975A1 FI 2012050104 W FI2012050104 W FI 2012050104W WO 2013113975 A1 WO2013113975 A1 WO 2013113975A1
Authority
WO
WIPO (PCT)
Prior art keywords
resource elements
user equipment
interference
information
related parameters
Prior art date
Application number
PCT/FI2012/050104
Other languages
English (en)
Inventor
Pekka JÄNIS
Cássio RIBEIRO
Klaus Hugl
Original Assignee
Nokia Corporation
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 Corporation filed Critical Nokia Corporation
Priority to PCT/FI2012/050104 priority Critical patent/WO2013113975A1/fr
Publication of WO2013113975A1 publication Critical patent/WO2013113975A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • 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
    • 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
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception

Definitions

  • Advanced receivers in 3rd generation partnership project (3GPP) long term evolution advanced (LTE-A) user equipment may be configured for interference limited operation. Signaling of reference symbol interference characteristics for advanced user equipment receivers may assist this configuration for interference limited operation. Interference suppression can lead to higher user throughput and therefore higher system capacity and better quality of service.
  • 3GPP 3rd generation partnership project
  • LTE-A long term evolution advanced
  • UE user equipment
  • the throughput of each user may be limited by the amount of interference received from other transmissions within the cell or from neighboring cells.
  • a multiantenna receiver may have, in principle, the capability to suppress part of the interference based on the spatial characteristics of the interference.
  • the receiver may need to acquire information on the interference structure.
  • a user equipment may form a linear minimum mean square error receiver based on estimates utilizing the available signals.
  • a method includes providing a user equipment with information about an expected interference situation on resource elements available for estimation of interference related parameters for data decoding.
  • the resource elements may either carry reference signals such as cell specific reference signals (CRS), demodulation reference signals (DM-RS), channel state information reference signals (CSI-RS) and/or also zero power resource elements such as zero power CSI-RS.
  • CRS cell specific reference signals
  • DM-RS demodulation reference signals
  • CSI-RS channel state information reference signals
  • the user equipment is configured to apply the information to improve performance of a receiver of the user equipment.
  • a method includes receiving information about an expected interference situation on resource elements carrying reference signals or zero power resource elements. The method also includes applying the information to improve performance of a receiver in a user equipment.
  • An apparatus in certain embodiments, includes at least one memory including computer program code and at least one processor.
  • the at least one memory and computer program code are configured to, with the at least one processor, cause the apparatus at least to provide a user equipment with information about an expected interference situation on resource elements carrying reference signals or zero power resource elements.
  • the user equipment is configured to apply the information to improve performance of a receiver of the user equipment.
  • an apparatus includes at least one memory including computer program code and at least one processor.
  • the at least one memory and computer program code are configured to, with the at least one processor, cause the apparatus at least to process information received about an expected interference situation on resource elements carrying reference signals or zero power resource elements.
  • the at least one memory and computer program code are further configured to, with the at least one processor, cause the apparatus at least to apply the information to improve performance of a receiver in a user equipment.
  • An apparatus includes, in certain embodiments, generating means for generating information about an expected interference situation on resource elements carrying reference signals or zero power resource elements.
  • the apparatus also includes providing means for providing the information to a user equipment.
  • the user equipment is configured to apply the information to improve performance of a receiver of the user equipment.
  • An apparatus includes receiving means for receiving information about an expected interference situation on resource elements carrying reference signals or zero power resource elements.
  • the apparatus also includes applying means for applying the information to improve performance of a receiver in a user equipment.
  • a non-transitory computer readable medium encodes a computer program that, when executed in hardware, performs a process.
  • the process includes providing a user equipment with information about an expected interference situation on resource elements carrying reference signals or zero power resource elements.
  • the user equipment is configured to apply the information to improve performance of a receiver of the user equipment.
  • a non-transitory computer readable medium encodes a computer program that, when executed in hardware, performs a process.
  • the process includes receiving information about an expected interference situation on resource elements carrying reference signals or zero power resource elements.
  • the process also includes applying the information to improve performance of a receiver in a user equipment.
  • a method includes providing a user equipment with information about an expected interference situation on resource elements used for estimation of interference related parameters.
  • the information is configured to be applied by the user equipment to improve performance of a receiver of the user equipment.
  • a method includes receiving information about an expected interference situation on resource elements used for estimation of interference related parameters. The method also includes applying the information to improve performance of a receiver in a user equipment.
  • An apparatus includes, in certain embodiments, at least one memory including computer program code and at least one processor.
  • the at least one memory and computer program code are configured to, with the at least one processor, cause the apparatus at least to provide a user equipment with information about an expected interference situation on resource elements used for estimation of interference related parameters.
  • the information is configured to be applied by the user equipment to improve performance of a receiver of the user equipment.
  • an apparatus includes at least one memory including computer program code and at least one processor.
  • the at least one memory and computer program code are configured to, with the at least one processor, cause the apparatus at least to process received information about an expected interference situation on resource elements used for estimation of interference related parameters.
  • the at least one memory and computer program code are also configured to, with the at least one processor, cause the apparatus at least to apply the information to improve performance of a receiver in a user equipment.
  • An apparatus in certain embodiments, includes generating means for generating information about an expected interference situation on resource elements used for estimation of interference related parameters.
  • the apparatus also includes providing means for providing a user equipment with the information about the expected interference situation on resource elements used for estimation of interferences parameters.
  • the information is configured to be applied by the user equipment to improve performance of a receiver of the user equipment.
  • an apparatus includes receiving means for receiving information about an expected interference situation on resource elements used for estimation of interference related parameters.
  • the apparatus also includes applying means for applying the information to improve performance of a receiver in a user equipment.
  • a non-transitory computer readable medium encoding a computer program that, when executed in hardware, performs a process, in certain embodiments.
  • the process includes providing a user equipment with information about an expected interference situation on resource elements used for estimation of interference related parameters.
  • the information is configured to be applied by the user equipment to improve performance of a receiver of the user equipment.
  • a non-transitory computer readable medium encoding a computer program that, when executed in hardware, performs a process.
  • the process includes receiving information about an expected interference situation on resource elements used for estimation of interference related parameters.
  • the process also includes applying the information to improve performance of a receiver in a user equipment.
  • Figure 1 illustrates a system in which base station is in an heterogeneous deployment according to certain embodiments.
  • Figure 2 illustrates a method according to certain embodiments.
  • Figure 3 illustrates a system according to certain embodiments.
  • Figure 4 illustrates a method according to certain embodiments of the present invention.
  • Figure 5 illustrates a method according to certain embodiments of the present invention.
  • FIG. 1 illustrates a system in which base station, such as an evolved Node B (eNodeB or eNB), is in an heterogeneous deployment, according to certain embodiments.
  • a serving eNodeB 110 can have several low power remote radio heads (RRH) 120 distributed over a cell area 115.
  • RRH remote radio heads
  • the remote radio heads would share the same cell identifier (also known as cell identity number or cell-ID) with the macro-cell eNodeB 110.
  • the received signal y at the user equipment (UE) 130 can be expressed as
  • H denotes the MEVIO channel gain
  • P denotes the combination of a precoder matrix and a transmit amplitude
  • x denotes a transmitted symbol
  • n is the additional noise at the receiver.
  • the subscript s denotes the intended signal
  • c denotes the co- scheduled signals (MU-MIMO transmissions from the same transmit point to other UEs 130)
  • k denotes interfering signals from transmit points that share the same cell-ID as the serving transmit point
  • m denotes the interfering signals from transmit points that have a different cell-ID as the serving eNodeB 110, such as those associated with one or more other eNodeB 140 (only one is shown).
  • an interference suppressing linear receiver matrix W for x s given the received signal y is the LMMSE receiver can be expressed as
  • p n the noise power
  • / is the identity matrix
  • () denotes the conjugate transpose operator.
  • the receiver matrix W the receiver may need to estimate the various quantities given in equations 1 and 2.
  • the user equipment may implement other receiver algorithms that possibly take other interference related parameters or statistics into account besides the interference covariance matrix or estimate thereof.
  • more than one reference signals can be used for channel estimation in, for example, 3rd generation partnership project (3GPP) long term evolution advanced (LTE-A), for the purpose of channel estimation for physical data shared channel (PDSCH) data demodulation.
  • 3GPP 3rd generation partnership project
  • LTE-A long term evolution advanced
  • PDSCH physical data shared channel
  • These reference signals can include cell-specific reference signals (CRS) and demodulation reference signals (DM-RS).
  • CRS cell-specific reference signals
  • DM-RS demodulation reference signals
  • the user equipment 130 may know the transmitted CRS and DM-RS symbols and positions in the time-frequency domain, that is the corresponding resource elements (RE) that include these symbols.
  • the user equipment 130 can use the reference signals (from CRS and/or DM-RS) in estimation of interference related parameters such as the interference covariance matrix.
  • CSI-RS channel state indication reference signal
  • zero power resource elements may be included in the transmission in the form of for example zero power CSI-RS configuration. CSI-RS and zero power CSI-RS may occur at specific times and therefore may be used at those times.
  • the user equipment 130 estimates the channel H s for the user equipment's own data transmission utilizing the reference signals, and then forms interference samples from the resource elements carrying reference symbols as
  • the performance of the estimated LMMSE receiver in equation (4) can depend on the quality of the channel estimate H s and the quality of the interference covariance matrix estimate. In principle, increasing the number of samples N re f supporting the interference covariance matrix estimate provides better accuracy. The amount of resource elements available for interference covariance matrix estimation in each physical resource block (PRB), however, is limited, which may limit actual performance.
  • PRB physical resource block
  • the CRS and possible CSI-RS symbols may not be precoded and are independent of the physical downlink shared channel transmission, while the DM-RS symbols may be precoded with the same precoder as the corresponding physical downlink shared channel symbols.
  • both reference signals can be used to form estimates of interference samples as, for example, in equation (3).
  • CRS can be cell-specific, meaning that the CRS from transmission (TX) points that share the same cell-ID may be the same and therefore may collide and combine at the receiver.
  • the interference related statistics estimates that are obtained from the CRS resource elements will not include interference from intra-cell sources, including multiuser multiple input - multiple output (MU-MIMO) transmissions and potentially independent PDSCH transmissions from geographically separated transmission points with same cell-ID.
  • MU-MIMO multiuser multiple input - multiple output
  • the statistics of the interference samples would not match that of the physical downlink shared channel of the interfering cell. This mismatch could affect receiver performance.
  • DM-RS resource elements may have all the interference sources present. Moreover, as noted above, the DM-RS resource elements may be precoded in the same way as the corresponding physical downlink shared channel.
  • the density of DM-RS might be lower compared to the CRS density. Therefore, in scenarios with dominant intercell interference it may consider also other reference signals such as CRS, CSI-RS, and/or zero power reference symbols for purposes of estimation of interference related parameters to improve the reliability of the estimates by having more independent N re f samples available.
  • CRS CRS
  • CSI-RS CSI-RS
  • zero power reference symbols for purposes of estimation of interference related parameters to improve the reliability of the estimates by having more independent N re f samples available.
  • two classes of UEs 130 can be identified.
  • One class illustrated by the right hand UE 130, may receive dominant interference from a transmission point (eNodeB or RRH) within a same cell (same cell-ID interference), for example, from remote radio heads 120 or serving eNodeB 1 10.
  • the other class illustrated by the left hand UE 130, receives dominant interference from another cell (different cell-ID interference), such as from other eNodeB 140.
  • eNodeB transmission point
  • RRH transmission point
  • the left hand UE 130 receives dominant interference from another cell (different cell-ID interference), such as from other eNodeB 140.
  • it may or may not be helpful to utilize the CRS based interference samples in the estimation of interference related parameters.
  • an eNodeB can inform a user equipment about the expected interference situation on resource elements carrying reference signals. This information can be applied in the user equipment for improving the receiver performance. The information may also be signaled indirectly from the eNodeB by recommending weights to be used by the user equipment when combining the interference estimates of interference related parameters obtained from different reference signals, such as CRS and DM-RS.
  • certain embodiments employ a combining method of estimates of interference related parameters based on different reference signals, such as DM-RS, CRS, CSI-RS, and zero power resource elements such as zero power CSI-RS based estimates of interference related parameters to provide an advantageous receiver implementation.
  • Figure 2 illustrates a method according to certain embodiments.
  • an eNodeB can estimate relative power of intercell interference and intracell interference with respect to one another.
  • the eNodeB can estimate the expected balance between intra-cell and inter-cell interference for the user equipment.
  • the estimate can be based on a combination of information.
  • the estimate can, at 211, be based on a relative location of the user equipment.
  • the estimate can be based on information regarding the user equipment's proximity to remote radio heads in the serving cell as well as the relative position of the remote radio head within the cell.
  • a user equipment that is connected to a remote radio head close to a cell edge may be more likely to observe strong inter-cell interference than a user equipment connected to a remote radio head that is toward the middle of the cell.
  • the estimate can also, at 213, be based on user equipment measurements that are fed back to the eNodeB.
  • the measurements can include, for example, reference signal received quality (RSRQ), channel quality indicator (CQI)/ precoder matrix indicator (PMI), and/or per transmission point CQI.
  • RSSQ reference signal received quality
  • CQI channel quality indicator
  • PMI precoder matrix indicator
  • the estimate can further be based, at 215, on eNodeB measurements.
  • measurements on the possible uplink (UL) sounding channels can be used to form the estimate.
  • the estimate can additionally, at 217, be based on scheduling decisions that may affect the quality and quantity of the intra-cell interference. For example, the decisions related to multiuser precoder selection, dynamic point selection, dynamic point blanking, coordinated scheduling, joint transmission, and the like.
  • the estimate can be based on reference symbol configurations in the serving and interfering cells.
  • the estimate can take into account frequency shift of the CRS pattern, the timing of the CSI-RS pattern in the serving and interfering cells, and/or the location of the zero-power resource elements in the physical resource block.
  • the eNodeB can form a message (for example, reference signal interference characteristic) and signal the message semi-statically or dynamically to the user equipment (UE) on, for example, a downlink (DL) control channel.
  • a message for example, reference signal interference characteristic
  • UE user equipment
  • DL downlink
  • the user equipment can implement a suitable estimator of interference related parameters such as the interference covariance matrix, that takes into account the presence of various interference sources on the various reference signals.
  • the signaled information may be the proportion of inter- cell and intra-cell interference expected to be present on the physical downlink shared channel (PDSCH) or just simply if the expected inter-cell or intra-cell interference is dominant.
  • PDSCH physical downlink shared channel
  • Similar weighting could be applied also for other reference signals as CSI-RS, as well as zero power resource elements such as zero power CSI-RS, as well as for other interference related parameters besides the interference covariance matrix.
  • the signaled information may be suitably quantized to a limited number of bits in order to achieve a desirable tradeoff between signaling overhead and receiver performance.
  • certain embodiments may be able to provide user equipment receiver performance that is adaptive to a wide variety of scenarios.
  • w may be either 0 or 1/2 , meaning a simple implementation for either averaging over all S or then only DM-RS.
  • FIG. 3 illustrates a system according to certain embodiments.
  • a system may include three devices, user equipment (UE) 130, eNodeB 110, and remote radio head 120 (additional devices, such as additional remote radio heads may also be present in the system).
  • Each of the devices 130, 110, and 120 may be equipped with at least one processor (respectively 334, 314, and 324), at least one memory (respectively 335, 315, and 325) (including computer program instructions or code), a transceiver (respectively 336, 316, and 326), and an antenna (respectively 337, 317, and 327).
  • the eNodeB 110 may be equipped for wired communication with a core network (not shown) and with the remote radio head 120.
  • the transceiver (respectively 336, 316, and 326) can be a transmitter, a receiver, both a transmitter and a receiver, or a unit that is configured both for transmission and reception.
  • the transceiver (respectively 336, 316, and 326) can be coupled to corresponding one or more antenna(s) (respectively 337, 317, and 327), which may include a directional antenna.
  • the at least one processor can be variously embodied by any computational or data processing device, such as a central processing unit (CPU) or application specific integrated circuit (ASIC).
  • the at least one processor can be implemented as one or a plurality of controllers.
  • the at least one memory can be any suitable storage device, such as a non-transitory computer-readable medium.
  • a hard disk drive (HDD) or random access memory (RAM) can be used in the at least one memory (respectively 335, 315, and 325).
  • the at least one memory can be on a same chip as the corresponding at least one processor (respectively 334, 314, and 324), or may be separate from the corresponding at least one processor (respectively 334, 314, and 324).
  • the computer program instructions may be any suitable form of computer program code.
  • the computer program instructions may be a compiled or interpreted computer program.
  • the at least one memory (respectively 335, 315, and 325) and computer program instructions can be configured to, with the at least one processor (respectively 334, 314, and 324), cause a hardware apparatus (for example, user equipment 130, eNodeB 110, or remote radio head 120) to perform a process, such as any of the processes described herein (see, for example, Figures 2, 4, and 5).
  • a hardware apparatus for example, user equipment 130, eNodeB 110, or remote radio head 120
  • a non-transitory computer-readable medium can be encoded with computer instructions that, when executed in hardware perform a process, such as one of the processes described herein.
  • a process such as one of the processes described herein.
  • certain embodiments of the present invention may be performed entirely in hardware.
  • each of user equipment 130, eNodeB 110, and remote radio head 120 can include a user interface that is operable connected to the processor (respectively 334, 314, and 324) and memory (respectively 335, 315, and 325).
  • That user interface can include a display, such as a liquid crystal display (LCD) or organic electroluminescent display (OELD), as well as speakers or audio outputs. Tactile outputs, such as a haptic feedback system, can also be included.
  • the user interface may have a touch screen to receive user input. User input can also be provided by a keypad, keyboard, microphone, joystick, mouse, trackball, or other input device.
  • the devices include a user interface.
  • the eNodeB 110 and remote radio head 120 may be embodied as rack-mounted computers.
  • the remote radio head 120 may serve as a peripheral device of the eNodeB 110, and thus may not necessarily have all the components illustrated in Figure 3.
  • Figure 4 illustrates a method according to certain embodiments of the present invention. The method of Figure 4 may be performed by an eNodeB in cooperation with a user equipment (such as described above with reference to Figure 3). As shown in Figure 4, at 405, an eNodeB may estimate interference contributions for a particular user equipment, as described above with reference to Figure 2.
  • the eNodeB may provide these interference expectations to the user equipment.
  • the interference expectations can be provided in various ways. For example, at 420, as an example of providing these interference expectations, the eNodeB can recommend weights for how various estimates of interference related parameters such as the interference covariance matrix are combined by the user equipment. This recommendation can be merely advisory or it can be mandatory for the user equipment. Alternatively, at 420, the eNodeB can indicate the portion/share of the expected intra-cell and inter-cell interference, which may be as well a simple indication if either intra-cell or inter-cell interference is expected to dominate.
  • the eNodeB can also provide various reference signals such as cell-specific reference signals (CRS), demodulation reference signals (DM-RS), and/or channel state information reference signals (CSI-RS) to the user equipment. Moreover the eNodeB can also provide information on the configuration of zero power resource elements such as zero power CSI-RS to the user equipment. These signals can be supplied at the same time as the other information regarding interference expectations, or at a different time.
  • the user equipment may be configured to apply, at 440, these expectations and other information to its own receiver.
  • Figure 5 illustrates a method according to certain embodiments. The method shown in Figure 5 may be performed by a user equipment in cooperation with an eNodeB (such as described above with reference to Figure 3).
  • an eNodeB such as described above with reference to Figure 3.
  • the method can include, at 510, receiving information about an expected interference situation on resource elements carrying reference signals.
  • the information can take various forms.
  • receiving the information can include, at 515, receiving recommended weights to be used when combining estimates of interference related parameters such as the interference covariance matrix estimates obtained from different reference signals.
  • the method can include receiving resource elements carrying both a cell-specific reference signal and a demodulation reference signal.
  • the method can also include, at 520, applying the information to improve receiver decoding performance in a user equipment.
  • the method can further include, at 530, feeding back measurements to an eNodeB, wherein the information about the expected interference situation is received from the eNodeB.

Landscapes

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

Abstract

L'invention a pour objet de configurer des récepteurs avancés dans des équipements d'utilisateurs (UE) Long Term Evolution avancés (LTE-A) selon le projet de partenariat pour la 3ème génération (3GPP) en vue d'un fonctionnement avec limitation du brouillage. Une signalisation de caractéristiques de brouillage de symboles de référence pour des récepteurs avancés d'équipements d'utilisateurs est susceptible de contribuer à cette configuration pour un fonctionnement avec limitation du brouillage. L'atténuation du brouillage peut conduire à un débit plus élevé pour les utilisateurs et par conséquent à une capacité supérieure du système et à une meilleure qualité de service. Un procédé selon l'invention peut comprendre les étapes consistant à transmettre à un équipement d'utilisateur des informations concernant une situation de brouillage attendu sur des éléments de ressources transportant des signaux de référence. L'équipement d'utilisateur peut être configuré pour appliquer les informations en vue d'améliorer les performances d'un récepteur de l'équipement d'utilisateur.
PCT/FI2012/050104 2012-02-03 2012-02-03 Signalisation de caractéristiques de brouillage de symboles de référence pour des récepteurs avancés d'ue WO2013113975A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2012/050104 WO2013113975A1 (fr) 2012-02-03 2012-02-03 Signalisation de caractéristiques de brouillage de symboles de référence pour des récepteurs avancés d'ue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2012/050104 WO2013113975A1 (fr) 2012-02-03 2012-02-03 Signalisation de caractéristiques de brouillage de symboles de référence pour des récepteurs avancés d'ue

Publications (1)

Publication Number Publication Date
WO2013113975A1 true WO2013113975A1 (fr) 2013-08-08

Family

ID=48904452

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2012/050104 WO2013113975A1 (fr) 2012-02-03 2012-02-03 Signalisation de caractéristiques de brouillage de symboles de référence pour des récepteurs avancés d'ue

Country Status (1)

Country Link
WO (1) WO2013113975A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016048537A1 (fr) * 2014-09-26 2016-03-31 Intel IP Corporation Estimation de paramètre assistée par réseau en présence d'interférence cellulaire

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110044187A1 (en) * 2009-08-18 2011-02-24 Koninklijke Philips Electronics N.V. Method for operating a radio station in a mobile network
WO2011115421A2 (fr) * 2010-03-17 2011-09-22 Lg Electronics Inc. Procédé et appareil permettant d'obtenir des informations de configuration de signal de référence d'informations d'état de canal (csi-rs) dans un système de communication sans fil supportant de multiples antennes
US20110256861A1 (en) * 2010-04-16 2011-10-20 Qualcomm Incorporated Radio link monitoring (rlm) and reference signal received power (rsrp) measurement for heterogeneous networks
US20110267937A1 (en) * 2010-04-30 2011-11-03 Qualcomm Incorporated Interference cancellation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110044187A1 (en) * 2009-08-18 2011-02-24 Koninklijke Philips Electronics N.V. Method for operating a radio station in a mobile network
WO2011115421A2 (fr) * 2010-03-17 2011-09-22 Lg Electronics Inc. Procédé et appareil permettant d'obtenir des informations de configuration de signal de référence d'informations d'état de canal (csi-rs) dans un système de communication sans fil supportant de multiples antennes
US20110256861A1 (en) * 2010-04-16 2011-10-20 Qualcomm Incorporated Radio link monitoring (rlm) and reference signal received power (rsrp) measurement for heterogeneous networks
US20110267937A1 (en) * 2010-04-30 2011-11-03 Qualcomm Incorporated Interference cancellation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
OHWATARI, Y. ET AL.: "Performance of Advanced Receiver Employing Interference Rejection Combining to Suppress Inter-Cell Interference in LTE-Advanced Downlink", IEEE VEHICULAR TECHNOLOGY CONFERENCE (VTC FALL), CONF. PROC., 9 May 2011 (2011-05-09), pages 1 - 7, XP032029680 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016048537A1 (fr) * 2014-09-26 2016-03-31 Intel IP Corporation Estimation de paramètre assistée par réseau en présence d'interférence cellulaire
US9578653B2 (en) 2014-09-26 2017-02-21 Intel IP Corporation Network assisted parameter estimation in the presence of inter-cell interference
CN106575973A (zh) * 2014-09-26 2017-04-19 英特尔Ip公司 存在小区间干扰时的网络辅助参数估计

Similar Documents

Publication Publication Date Title
US10827375B2 (en) Configuration of coordinated multipoint transmission hypotheses for channel state information reporting
EP3286862B1 (fr) Amélioration de rétroaction d'état de canal de transmission de superposition d'utilisateurs multiples en liaison descendante
EP2847878B1 (fr) Procédé et agencement pour rapporter l'état de canal
EP2847879B1 (fr) Procédés et agencements pour consigner l'état de canal
CN110832803B (zh) 用于多用户多入多出的干扰测量和信道状态信息反馈
KR101416783B1 (ko) 협력형 멀티포인트 전송을 위한 개선들
AU2013260212B2 (en) Methods and arrangements for CSI reporting
EP2828984B1 (fr) Injection de brouillage artificielle pour rapport d'informations d'état de canal
US20120088458A1 (en) Transmission device, receiving device, communication system, and communication method
US20150382371A1 (en) Method and system for network-assisted interference suppression/cancelation
US9774416B2 (en) Mobile communication terminal
EP3480965A1 (fr) Procédé et appareil de traitement d'informations
WO2012121008A1 (fr) Dispositif de terminal mobile, station de base sans fil et procédé de communication sans fil
CN114268419A (zh) 用户设备、用户设备的方法以及系统
JP2023100740A (ja) 端末、無線通信方法、及びシステム
WO2013113975A1 (fr) Signalisation de caractéristiques de brouillage de symboles de référence pour des récepteurs avancés d'ue

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: 12867427

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: 12867427

Country of ref document: EP

Kind code of ref document: A1