WO2018062873A1 - Procédé et appareil de gestion d'interférence de liaison descendante à liaison montante dans un système de communication sans fil - Google Patents

Procédé et appareil de gestion d'interférence de liaison descendante à liaison montante dans un système de communication sans fil Download PDF

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Publication number
WO2018062873A1
WO2018062873A1 PCT/KR2017/010761 KR2017010761W WO2018062873A1 WO 2018062873 A1 WO2018062873 A1 WO 2018062873A1 KR 2017010761 W KR2017010761 W KR 2017010761W WO 2018062873 A1 WO2018062873 A1 WO 2018062873A1
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WO
WIPO (PCT)
Prior art keywords
information
tti
base station
resource allocation
subframe
Prior art date
Application number
PCT/KR2017/010761
Other languages
English (en)
Inventor
Jongbu LIM
Taeyoung Kim
Hyunseok Ryu
Jiyun SEOL
Peng XUE
Yeohun YUN
Original Assignee
Samsung Electronics Co., Ltd.
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 Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Publication of WO2018062873A1 publication Critical patent/WO2018062873A1/fr

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    • 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
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H04J11/0056—Inter-base station aspects
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • 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
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2211/00—Orthogonal indexing scheme relating to orthogonal multiplex systems
    • H04J2211/003—Orthogonal indexing scheme relating to orthogonal multiplex systems within particular systems or standards
    • H04J2211/005—Long term evolution [LTE]

Definitions

  • 5G communication systems to IoT networks.
  • technologies such as a sensor network, Machine Type Communication (MTC), and Machine-to-Machine (M2M) communication may be implemented by beamforming, MIMO, and array antennas.
  • MTC Machine Type Communication
  • M2M Machine-to-Machine
  • Application of a cloud Radio Access Network (RAN) as the above-described Big Data processing technology may also be considered to be as an example of convergence between the 5G technology and the IoT technology.
  • RAN Radio Access Network
  • the method may further include removing, by the base station, self interference.
  • the method may further include requesting scheduling in consideration of interference to the adjacent base station.
  • the downlink control information may include information of a service type for at least one of subframes subsequent to an n+k-th subframe, or information of a service type for at least one of TTIs subsequent to an n+k-th TTI.
  • the method may further include transmitting an indicator indicating to ignore the resource allocation information to the terminal.
  • the controller may perform a control to transmit information on a ratio of the uplink and the downlink allocated at the n+k-th TTI, associated with the second resource allocation change information to the terminal.
  • the controller may control the transceiver to receive downlink control information of the first TTI.
  • FIG. 5 illustrates another example of interference management scheduling using UL/DL configuration information of an adjacent base station according to the first embodiment of the present disclosure
  • FIGS. 7A and 7B illustrate an example of configuration information transmission resource allocation according to the first embodiment of the present disclosure
  • FIG. 17 illustrates an example of a dynamic TDD operation according to a second embodiment of the present disclosure
  • FIGS. 19A and 19B illustrate an example of a method of Ack/Nack management according to a change of a pre-allocated subframe according to the second embodiment of the present disclosure
  • FIGS. 20A and 20B illustrate an example of a method for increasing a reception rate of subframe/slot type change information according to the second embodiment of the present disclosure
  • FIG. 27 illustrates a base station apparatus effectively supporting a low latency service in a dynamic TDD system according to the second embodiment of the present disclosure.
  • a term “unit” used in the embodiments of the disclosure means, but is not limited to, a software or hardware element such as a field programmable gate array (FPGA) or application specific integrated circuit (ASIC), which performs certain roles.
  • the term “unit” is not limited to software or hardware.
  • a “unit” may be configured to reside on an addressable storage medium or configured to execute one or more processors.
  • a “unit” may include, for example, elements, such as software elements, object-oriented software elements, class elements and task elements, processes, functions, attributes, procedures, subroutines, segments of a program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.
  • information on a resource through which UL/DL configuration information is transmitted from each base station may be shared between base stations in advance.
  • the interfered base station needs to be able to receive UL/DL configuration information of an adjacent base station by managing resources in consideration of the CAR. There are two primary alternatives.
  • FIG. 11 illustrates interference management scheduling according to the procedure illustrated in FIG. 10 according to the first embodiment of the present disclosure.
  • FIG. 14B shows an embodiment of a procedure for obtaining UL/DL configuration information by overhearing, by an interfered base station, UL/DL configuration information transmitted from an interfering base station to a terminal.
  • an interference table for each active/connected UE C-RNTI and beam pair is exchanged between base stations (S1411), and UL/DL configuration information is transmitted from the interfering base station to the terminal (S1421).
  • FIG. 16 shows a concept of flexible TDD.
  • the flexible TDD is a method of efficiently utilizing a resource through dynamic allocation of uplink/downlink TDD resources, in which each base station may use different frame structures by reflecting uplink/downlink traffic.
  • UL/DL configuration 1 may be applied, and if the DL traffic is increased, UL/DL configuration 2 in which DL more than UL may be transmitted in one frame may be applied. Through this, UL/DL traffic arriving asymmetrically may be efficiently transmitted.
  • UL grant transmitted in a current (n) subframe/slot is resource allocation information for an (n+k)-th subframe/slot.
  • k may be an integer greater than 1.
  • k is set to a value greater than 4 in consideration of a reception processing time, and the like. By doing so, a future use of a subframe/slot is determined in advance.
  • the case of reading a PDDCH on a short TTI basis always/according to a condition may be divided into two cases.
  • a first case is a method of searching all search spaces, and a second case is a method of searching only a common search space.
  • the later case has an advantage of decreasing blind detection, while the former has an advantage of increasing scheduling flexibility.
  • the case of reading a PDDCH on a short TTI basis always/according to a condition may be divided into two cases.
  • a first case is a method of searching all search spaces, and a second case is a method of searching only a common search space.
  • the later case has an advantage of decreasing blind detection, while the former has an advantage of increasing scheduling flexibility.
  • DL control information may be positioned at the front of the subframe/slot, and a GP is always required. Since UL URLLC and HARQ ACK/NACK information is positioned at a rear portion of the subframe/slot, latency may be relatively increased. Although UL grant for part of an n-th subframe is transmitted at an (n-k)-th subframe/slot, an operation may be made even when information on a transmission direction is not transmitted together.
  • an UE having a UL URLLC packet to be transmitted transmits an SR to a base station.
  • size information of the URLLC packet size to be transmitted is transmitted together.
  • the URLLC packet size is selected from a URLLC packet size table, and corresponding information bit may be transmitted.
  • the UE performs transmission processing for the UL URLLC packet while waiting UL grant from the BS, and transmits the UL URLLC packet in an (n+2)-th subframe/slot after receiving UL grant from an n-th subframe/slot.
  • FIG. 27 illustrates a base station apparatus (or BS node) supporting a low latency service in a dynamic TDD system according to the second embodiment of the present disclosure.
  • the recognizer 2710 may recognize whether a packet requiring low latency arrives.
  • the recognizer 2810 may recognize whether a packet requiring low latency arrives.
  • the determining unit 2830 selects bit information for a low latency packet size to be transmitted together with an SR referring to a transmittable low latency packet table stored in the storage unit 2820.
  • a terminal operated on a long TTI basis may determine whether to decode downlink control information transmitted on a short TTI basis. Further, the determining unit 2830 may determine whether to ignore information of UL grant allocated in a specific subframe/slot by receiving transmission and UL grant information transmitted from the base station.
  • the generator 2840 performs transmission processing to transmit the information obtained in the determining unit 2830 through a wireless channel. Further, transmission processing for a low latency packet to be transmitted before UL grant is received is performed.

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

Abstract

La présente invention concerne un procédé et un système de communication destinés à faire converger un système de communications de 5ème génération (5G) afin de prendre en charge des débits de données plus élevés au-delà d'un système de 4ème génération (4G) avec une technologie destinée à l'Internet des objets (IdO). La présente invention peut être appliquée à des services intelligents basés sur la technologie de communication 5G et la technologie liée à l'IdO, comme la maison intelligente, le bâtiment intelligent, la ville intelligente, la voiture intelligente ou la voiture connectée, les soins de santé, l'enseignement numérique, le commerce de détail intelligent, les services de sécurité et de sûreté. La présente invention concerne un procédé capable de résoudre un problème d'interférence de liaison descendante à liaison montante (DL-à-UL)) se produisant sous la forme d'un duplexage par répartition dans le temps dynamique (TDD) appliqué dans un système de communication sans fil.
PCT/KR2017/010761 2016-09-29 2017-09-27 Procédé et appareil de gestion d'interférence de liaison descendante à liaison montante dans un système de communication sans fil WO2018062873A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20160125893 2016-09-29
KR10-2016-0125893 2016-09-29

Publications (1)

Publication Number Publication Date
WO2018062873A1 true WO2018062873A1 (fr) 2018-04-05

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WO (1) WO2018062873A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR102072307B1 (ko) * 2018-09-21 2020-04-02 동국대학교 산학협력단 고신뢰 저지연 통신을 위한 통신 방법 및 장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110211503A1 (en) * 2008-10-31 2011-09-01 Nokia Corporation Dynamic allocation of subframe scheduling for time divison duplex operation in a packet-based wireless communication system
WO2014110802A1 (fr) * 2013-01-18 2014-07-24 Broadcom Corporation Changement de configuration de tdd pour la gestion du brouillage entre liaisons montante et descendante et l'adaptation au trafic
US20150333877A1 (en) * 2013-01-04 2015-11-19 Telefonaktiebolaget L M Ericsson (Publ) Mitigating Cross-Link Interference When Using Reconfigurable TDD
US20160183232A1 (en) * 2014-12-19 2016-06-23 Futurewei Technologies, Inc. System and Method for Interference Coordination in Cellular Millimeter Wave Communications Systems
US20160249329A1 (en) * 2015-02-24 2016-08-25 Huawei Technologies Co., Ltd. System and Method for Transmission Time Intervals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110211503A1 (en) * 2008-10-31 2011-09-01 Nokia Corporation Dynamic allocation of subframe scheduling for time divison duplex operation in a packet-based wireless communication system
US20150333877A1 (en) * 2013-01-04 2015-11-19 Telefonaktiebolaget L M Ericsson (Publ) Mitigating Cross-Link Interference When Using Reconfigurable TDD
WO2014110802A1 (fr) * 2013-01-18 2014-07-24 Broadcom Corporation Changement de configuration de tdd pour la gestion du brouillage entre liaisons montante et descendante et l'adaptation au trafic
US20160183232A1 (en) * 2014-12-19 2016-06-23 Futurewei Technologies, Inc. System and Method for Interference Coordination in Cellular Millimeter Wave Communications Systems
US20160249329A1 (en) * 2015-02-24 2016-08-25 Huawei Technologies Co., Ltd. System and Method for Transmission Time Intervals

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KR20180035707A (ko) 2018-04-06

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