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WO2015014407A1 - Agencement de mode de transmission pour un duplexage à répartition dans le temps (tdd) flexible - Google Patents

Agencement de mode de transmission pour un duplexage à répartition dans le temps (tdd) flexible Download PDF

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Publication number
WO2015014407A1
WO2015014407A1 PCT/EP2013/066249 EP2013066249W WO2015014407A1 WO 2015014407 A1 WO2015014407 A1 WO 2015014407A1 EP 2013066249 W EP2013066249 W EP 2013066249W WO 2015014407 A1 WO2015014407 A1 WO 2015014407A1
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WO
WIPO (PCT)
Prior art keywords
dci
downlink control
control information
format
reference signals
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2013/066249
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English (en)
Inventor
Timo Erkki Lunttila
Esa Tapani Tiirola
Frank Frederiksen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks Oy
Original Assignee
Nokia Solutions and Networks 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 Solutions and Networks Oy filed Critical Nokia Solutions and Networks Oy
Priority to PCT/EP2013/066249 priority Critical patent/WO2015014407A1/fr
Publication of WO2015014407A1 publication Critical patent/WO2015014407A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0079—Formats for control data
    • 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
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • Embodiments of the invention generally relate to mobile communications networks, such as, but not limited to, the Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN), Long Term Evolution (LTE) Evolved UTRAN (E-UTRAN), and/or LTE- A.
  • UMTS Universal Mobile Telecommunications System
  • UTRAN Universal Mobile Telecommunications System
  • LTE Long Term Evolution
  • E-UTRAN Evolved UTRAN
  • LTE-UTRAN LTE-UTRAN
  • Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network refers to a communications network including base stations, or Node Bs, and for example radio network controllers (RNC).
  • UTRAN allows for connectivity between the user equipment (UE) and the core network.
  • the RNC provides control functionalities for one or more Node Bs.
  • the RNC and its corresponding Node Bs are called the Radio Network Subsystem (RNS).
  • RNS Radio Network Subsystem
  • E-UTRAN enhanced UTRAN
  • eNodeB enhanced Node B
  • eNB enhanced Node B
  • LTE Long Term Evolution
  • E-UTRAN refers to improvements of the
  • LTE is a 3GPP standard that provides for uplink peak rates of at least 50 megabits per second (Mbps) and downlink peak rates of at least 100 Mbps.
  • LTE supports scalable carrier bandwidths from 20 MHz down to 1 .4 MHz and supports both Frequency Division Duplexing
  • FDD Frequency Division Duplexing
  • TDD Time Division Duplexing
  • LTE may also improve spectral efficiency in networks, allowing carriers to provide more data and voice services over a given bandwidth. Therefore, LTE is designed to fulfill the needs for high-speed data and media transport in addition to high-capacity voice support. Advantages of LTE include, for example, high throughput, low latency, FDD and TDD support in the same platform, an improved end-user experience, and a simple architecture resulting in low operating costs.
  • LTE-A LTE- Advanced
  • LTE-A is directed toward extending and optimizing the 3GPP LTE radio access technologies.
  • a goal of LTE-A is to provide significantly enhanced services by means of higher data rates and lower latency with reduced cost.
  • LTE-A will be a more optimized radio system fulfilling the international telecommunication union-radio (ITU-R) requirements for IMT-Advanced while keeping the backward compatibility.
  • ITU-R international telecommunication union-radio
  • One embodiment is directed to a method including transmitting, by an eNodeB, enhanced physical downlink control channel (EPDCCH) in flexible subframe(s).
  • the method may then include depending on operation type(s), applying different downlink control information (DCI) formats in the flexible subframe(s).
  • the applying may include using at least one downlink control information (DCI) size to indicate that common reference signals (CRS) is not present in a current subframe and physical downlink shared channel (PDSCH) demodulation of the current subframe is based on demodulation reference signals (DMRS) only.
  • DCI downlink control information
  • CRS common reference signals
  • PDSCH physical downlink shared channel
  • Another embodiment is directed to an apparatus including at least one processor and at least one memory comprising computer program code.
  • the at least one memory and the computer program code are configured, with the at least one processor, to cause the apparatus at least to transmit enhanced physical downlink control channel (EPDCCH) in flexible subframe(s), and depending on operation type(s), to apply different downlink control information (DCI) formats in the flexible subframe(s).
  • EDCCH enhanced physical downlink control channel
  • DCI downlink control information
  • the at least one memory and the computer program code are further configured, with the at least one processor, to cause the apparatus at least to use at least one downlink control information (DCI) size to indicate that common reference signals (CRS) is not present in a current subframe and physical downlink shared channel (PDSCH) demodulation of the current subframe is based on demodulation reference signals (DMRS) only.
  • DCI downlink control information
  • CRS common reference signals
  • PDSCH physical downlink shared channel
  • DMRS demodulation reference signals
  • FIG. 1 illustrates UL/DL configurations for TD-LTE
  • Fig. 2 illustrates an example radio frame showing Downlink (D), Uplink (U) and Special (S) subframes according to exemplary SI B-1 configuration #0, as well as an exemplary configuration of flexible (F) subframes, according to an embodiment;
  • Fig. 3 illustrates an example of the different subframe types from legacy UEs' and Rel-12 UEs' point of view, according to an embodiment
  • Fig. 4 illustrates an example of the association between control channels, search spaces and DCI formats, according to one embodiment
  • FIG. 5a illustrates an apparatus according to one embodiment
  • FIG. 5b illustrates an apparatus according to another embodiment
  • FIG. 6 illustrates a flow diagram of a method according to an embodiment.
  • Embodiments of the invention relate to Rel-12 Work Item elMTA - "Further Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation". More specifically, certain embodiments introduce concepts for transmission modes for elMTA, including the definition of DL control channel (PDCCH/EPDCCH) association.
  • PDCH/EPDCCH DL control channel
  • certain embodiments provide a scheme where the eNB can dynamically change the transmission mode without relying on radio resource control (RRC) signaling.
  • RRC radio resource control
  • the eNB may transmit only enhanced physical downlink control channel (ePDCCH) in flexible subframe (i.e., no PDCCH transmission).
  • ePDCCH enhanced physical downlink control channel
  • the eNB may apply different downlink control information (DCI) formats in flexible subframe than in the fixed DL subframes.
  • DCI downlink control information
  • the eNB may apply a larger DCI format size (such as DCI format 2A/B/C/D) for demodulation reference signals (DMRS) demodulation, and apply a smaller DCI format size (such as DCI format 0/1 A) for fallback operation.
  • a larger DCI format size such as DCI format 2A/B/C/D
  • DMRS demodulation reference signals
  • the goal of elMTA work item is to enable more flexible time division duplexing (TDD) uplink-downlink (UL-DL) reconfiguration for traffic adaptation in, for example, small cells.
  • TDD time division duplexing
  • UL-DL uplink-downlink
  • the starting point following the Rel-12 assumptions is that the eNB may vary UL-DL configuration relatively often (for those UEs configured to flexible UL/DL mode) compared to the existing situation where UL- DL configuration is in practice very stationary.
  • SIB-1 system information block #1
  • the legacy UEs e.g., Rel-8 to Rel-1 1
  • the cell follow this configuration all the time.
  • each UL-DL configuration there are fixed subframes where the link direction is always predetermined. These fixed subframes are denoted as D (Downlink), S (Special) and U (Uplink).
  • Flexible subframes can be used as D or U.
  • the number of Flexible subframes may depend on the scenario (e.g., by SIB-1 configuration).
  • Fig. 2 illustrates an example radio frame showing Downlink (D)
  • the example of Fig. 2 depicts TDD SIB-1 configured UL-DL configuration 0 as an example, but the same principle applies to other configurations as well.
  • SIB-1 configured UL-DL configuration which defines whether a given subframe in the radio frame is downlink, special, or uplink subframe
  • some of the uplink subframes can be changed into downlink subframes.
  • elMTA One of the remaining aspects of elMTA work is the definition of transmission modes to be applied on flexible subframes when used as downlink subframes. As a result, certain embodiments provide concepts for transmission modes for elMTA, including the definition of DL control channel (PDCCH/EPDCCH) association.
  • PDCH/EPDCCH DL control channel
  • NCT subframes are seen as UL subframes from legacy UEs' point of view. UL usage of NCT subframes can be completely prevented by a specific eNB scheduler implementation and/or proper selection of NCT subframes. Meanwhile, NCT subframes are seen as NCT DL (or UL) subframes from Rel-12 UEs' point of view. On DL side, NCT subframes do not suffer from restrictions given by legacy
  • Fig. 3 illustrates the different subframe types from legacy UEs' and Rel-12 UEs' point of view.
  • DL transmission modes defined in TS 36.213 determine the key properties of the system operation. These include:
  • Possible transmission schemes e.g., closed loop MIMO, beamforming, Transmit Diversity, etc.
  • At least one DCI size option may be used to indicate that CRS is not present at all in the current subframe and physical downlink shared channel (PDSCH) demodulation of the current subframe is based on DMRS only (this may be referred to as transmission mode or method #1 ).
  • At least one other DCI size option may be used to indicate that CRS is present and PDSCH demodulation of the current subframe is based on CRS only (this may be referred to as transmission mode or method #2).
  • DMRS may be present only on physical resource block (PRB) pairs allocated to EPDCCH, while the CRS may be present only on PRB pairs allocated to the PDSCH, but potentially also be configured to be present over all non-EPDCCH PRB pairs.
  • PRB physical resource block
  • a benefit of this embodiment is that the eNB may dynamically vary the RS strategy and related transmission scheme during flexible subframes based on various conditions, such as depending on the quality of the CSI that is available. This enables a considerable increase in the flexibility compared to statically configured transmission mode, where the transmission mode is configured through higher layer signaling (e.g., RRC signaling) and the CRS are always present. Improved flexibility can be achieved without any increase in the UE control channel blind decoding burden compared to current Rel-1 1 decoding burden, and without any additional ambiguity issues involved in UEs' blind decoding operation.
  • RRC signaling e.g., RRC signaling
  • subframes triggered using two DCI size options there may also be some other functional differences between subframes triggered using two DCI size options. These differences include: (1 ) different CSI measurement and/or reporting procedure (depending on the presence of CRS); and (2) different multi-antenna strategy (e.g., beamforming, CRS-based closed-loop MIMO vs open-loop MIMO / transmit diversity).
  • One embodiment may include a three-fold operation of the transmission mode/method and/or reference symbol configuration.
  • the eNB may apply different DCI sizes in flexible subframe depending on the operation type.
  • the large size DCI format e.g., format 2A/B/C
  • the compact size DCI format (e.g., format 0/1 A) may indicate CRS based fall-back operation for the PDSCH reception.
  • this smaller DCI format may be used for PDSCH scheduling only (PUSCH / UL scheduling is precluded).
  • the UL/DL bit of the format 0/1A in one state can be used to indicate the CRS being transmitted over the full frequency band (possibly excluding the EPDCCH resources).
  • the UL/DL bit of the format 0/1A in the other state can be used to indicate the CRS bandwidth being limited to the PDSCH resources being scheduled using the DCI format.
  • the three-fold operation of the transmission mode and/or reference symbol configuration may have another setup.
  • the large size DCI format e.g., format 2A/B/C/D
  • the compact size DCI format e.g., format 0/1A
  • the UL/DL bit of the format 0/1 A in one state may be used to indicate that the PDSCH transmission / demodulation is relying on common reference symbols (CRS).
  • CRS common reference symbols
  • UL/DL bit of the format 0/1A in the other state may be used to indicate that the compact PDSCH allocation is based on DMRS being used for demodulation.
  • PDCCH fixed DL subframes
  • EPDCCH EPDCCH
  • NCT/elMTA subframes This may include different starting OFDM symbol position for the PDSCH, scheduling of UL transmissions may be precluded in the flexible DL subframes (e.g., to reduce the size of DCI and/or reduce the impact of false positive problem) and to maintain consistency to the overall scheduling algorithm
  • EPDCCH exists (e.g., fixed D & S), EPDCCH is typically not configured and legacy transmission modes are applied as normal. In case EPDCCH is configured, it operates as normal Rel-1 1 EPDCCH such that it is used to schedule both UL and DL traffic.
  • EPDCCH is used for triggering PDSCH within the same subframe and at least one new transmission mode (TM) based on DMRS is added.
  • TM new transmission mode
  • the PDSCH may start from the first OFDMA symbol of the subframe.
  • the EPDCCH may start at the first OFDM symbol of the subframe. Scheduling of UL transmissions may be precluded in the flexible DL subframes.
  • the new carrier type transmission mode or method (NCT TM) to be used in flexible subframes containing no CRS can be characterized as discussed in the following.
  • the TM includes a possibility for transmission of at least two DCI Formats: large DCI, and compact
  • DCI 1 C it may be possible to transmit a very compact DCI (i.e., DCI 1 C).
  • the large DCI may include "regular" DMRS based operation, for example, using DCI 2D.
  • a UE decodes a large DCI, it may assume that DMRS are used as a demodulation reference for the PDSCH and that no CRS shall be present on the PDSCH PRBs.
  • the compact DCI which in Rel-1 1 is used for UL allocations - and compact format DL allocations, may be used for fallback purposes when accurate CSI (especially PMI) is not available.
  • the compact DCI may be DCI 1A based, but could also be some other predefined mode.
  • the flag in case scheduling of PUSCH is not allowed in flexible DL subframes, there may be no need for DCI format 1A/0 flag to distinguish between an UL grant and a DL assignment (the flag can, for example, be always set to "1 " or removed or used for other purposes).
  • the existing functionality with respect to DCI 1A/0 may be kept.
  • the UE when a UE decodes a compact DCI, the UE may assume that CRS are transmitted in the data region, and can be used as PDSCH demodulation reference. In addition, the UE may assume that DMRS are not transmitted in the PDSCH region.
  • open loop transmit diversity transmission scheme is applied.
  • Fig. 4 illustrates an example of the association between control channels, search spaces and DCI formats, according to one embodiment.
  • the eNB selects for each flexible subframe between DMRS and CRS based modes (e.g., based on CSI). This can be done in fully dynamic manner and without any increase in UE complexity. It should be noted that the number of UE control channel (PDCCH/EPDCCH) blind decodings is essentially the same in both fixed and flexible subframes.
  • PDCCH/EPDCCH UE control channel
  • Fig. 5a illustrates an example of an apparatus 10 according to an embodiment.
  • apparatus 10 may be a base station in a communications system, such as an eNodeB in LTE. It should be noted that one of ordinary skill in the art would understand that apparatus 10 may include components or features not shown in Fig. 5a. Only those components or features necessary for illustration of the invention are depicted in Fig. 5a.
  • apparatus 10 includes a processor 22 for processing information and executing instructions or operations.
  • processor 22 may be any type of general or specific purpose processor. While a single processor 22 is shown in Fig. 5a, multiple processors may be utilized according to other embodiments. In fact, processor 22 may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), application- specific integrated circuits (ASICs), and processors based on a multi-core processor architecture, as examples.
  • DSPs digital signal processors
  • FPGAs field-programmable gate arrays
  • ASICs application-specific integrated circuits
  • Apparatus 10 further includes a memory 14, which may be coupled to processor 22, for storing information and instructions that may be executed by processor 22.
  • Memory 14 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor- based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and removable memory.
  • memory 14 can be comprised of any combination of random access memory (RAM), read only memory (ROM), static storage such as a magnetic or optical disk, or any other type of non-transitory machine or computer readable media.
  • the instructions stored in memory 14 may include program instructions or computer program code that, when executed by processor 22, enable the apparatus 10 to perform tasks as described herein.
  • apparatus 10 may be further controlled to use at least one other downlink control information (DCI) size to indicate that common reference signals (CRS) are present in a current subframe and physical downlink shared channel (PDSCH) demodulation of the current subframe is based on the common reference signals (CRS) only.
  • DCI downlink control information
  • PDSCH physical downlink shared channel
  • Fig. 5b illustrates an example of an apparatus 20 according to another embodiment.
  • apparatus 20 may be a UE. It should be noted that one of ordinary skill in the art would understand that apparatus 20 may include components or features not shown in Fig. 5b. Only those components or features necessary for illustration of the invention are depicted in Fig. 5b.
  • Processor 32 may perform functions associated with the operation of apparatus 20 including, without limitation, precoding of antenna gain/phase parameters, encoding and decoding of individual bits forming a communication message, formatting of information, and overall control of the apparatus 20, including processes related to management of communication resources.
  • apparatus 20 when apparatus 20 decodes the large size DCI, it may assume that DMRS are used as a demodulation reference for the PDSCH and that no CRS is present on the PDSCH PRBs. According to an embodiment, when apparatus 20 decodes the compact size DCI, it may assume that CRS are transmitted in the data region and can be used as PDSCH demodulation reference. In addition, for the compact size DCI, apparatus 20 may assume that DMRS are not transmitted in the data region.

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

Abstract

L'invention concerne des systèmes, des procédés, des appareils et des produits programme d'ordinateur pour changer de manière dynamique un mode de transmission. Un procédé comprend, durant une transmission, l'opération suivant laquelle le nœud B évolué (eNB) transmet uniquement un EPDCCH dans une ou plusieurs sous-trames flexibles. En fonction d'un ou plusieurs types d'opérations, l'eNB applique différents formats DCI dans la ou les sous-trames flexibles. L'application peut consister à utiliser au moins une taille d'informations de commande de liaison descendante (DCI) pour indiquer que des signaux de référence commune (CRS) ne sont pas présents dans une sous-trame courante et une démodulation de canal partagé de liaison descendante physique (PDSCH) de la sous-trame courante est basée uniquement sur des signaux de référence de démodulation (DMRS).
PCT/EP2013/066249 2013-08-02 2013-08-02 Agencement de mode de transmission pour un duplexage à répartition dans le temps (tdd) flexible Ceased WO2015014407A1 (fr)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017014435A1 (fr) * 2015-07-17 2017-01-26 주식회사 케이티 Procédé d'attribution de ressources et dispositif de communication
CN107294688A (zh) * 2016-03-31 2017-10-24 华为技术有限公司 数据传输的方法以及基站
WO2018048637A1 (fr) * 2016-09-07 2018-03-15 Qualcomm Incorporated Configuration de signal de référence spécifique à une cellule (crs) et de canal de commande dans des communications sans fil
CN107852234A (zh) * 2015-07-17 2018-03-27 株式会社 Kt 资源分配方法和通信装置
US10673588B2 (en) 2018-05-14 2020-06-02 At&T Intellectual Property I, L.P. Shared demodulation reference signal design for control channels in 5G or other next generation networks
US10917223B2 (en) 2016-10-04 2021-02-09 Samsung Electronics Co., Ltd. Apparatus and method for interference management in wireless communication system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130194980A1 (en) * 2012-01-27 2013-08-01 Sharp Laboratories Of America, Inc. Devices for reconfiguring uplink and downlink allocations

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130194980A1 (en) * 2012-01-27 2013-08-01 Sharp Laboratories Of America, Inc. Devices for reconfiguring uplink and downlink allocations

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NOKIA SIEMENS NETWORKS ET AL: "Downlink control signaling and transmission mode design for CoMP", 3GPP DRAFT; R1-121281, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Jeju, Korea; 20120326 - 20120330, 20 March 2012 (2012-03-20), XP050599571 *
SAMSUNG: "Dynamic reconfiguration of TDD UL-DL configuration", 3GPP DRAFT; R1-122267 DYNAMIC RECONFIGURATION OF TDD UL-DL CONFIGURATION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Prague, Czech Republic; 20120521 - 20120525, 12 May 2012 (2012-05-12), XP050600530 *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017014435A1 (fr) * 2015-07-17 2017-01-26 주식회사 케이티 Procédé d'attribution de ressources et dispositif de communication
CN107852234A (zh) * 2015-07-17 2018-03-27 株式会社 Kt 资源分配方法和通信装置
US10827486B2 (en) 2015-07-17 2020-11-03 Kt Corporation Resource allocation method and communication device
CN107852234B (zh) * 2015-07-17 2021-05-18 株式会社 Kt 资源分配方法和通信装置
CN107294688A (zh) * 2016-03-31 2017-10-24 华为技术有限公司 数据传输的方法以及基站
CN107294688B (zh) * 2016-03-31 2021-01-15 华为技术有限公司 数据传输的方法以及基站
WO2018048637A1 (fr) * 2016-09-07 2018-03-15 Qualcomm Incorporated Configuration de signal de référence spécifique à une cellule (crs) et de canal de commande dans des communications sans fil
CN109690996A (zh) * 2016-09-07 2019-04-26 高通股份有限公司 在无线通信中的小区特定参考信号（crs）和控制信道配置
US10498593B2 (en) 2016-09-07 2019-12-03 Qualcomm Incorporated Cell-specific reference signal (CRS) and control channel configuration in wireless communications
US10917223B2 (en) 2016-10-04 2021-02-09 Samsung Electronics Co., Ltd. Apparatus and method for interference management in wireless communication system
US10673588B2 (en) 2018-05-14 2020-06-02 At&T Intellectual Property I, L.P. Shared demodulation reference signal design for control channels in 5G or other next generation networks
US11411699B2 (en) 2018-05-14 2022-08-09 At&T Intellectual Property I, L.P. Shared demodulation reference signal design for control channels in 5G or other next generation networks

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