WO2018139714A1 - Appareil et procédé de programmation de liaison montante dans un réseau cellulaire tdd - Google Patents

Appareil et procédé de programmation de liaison montante dans un réseau cellulaire tdd Download PDF

Info

Publication number
WO2018139714A1
WO2018139714A1 PCT/KR2017/005680 KR2017005680W WO2018139714A1 WO 2018139714 A1 WO2018139714 A1 WO 2018139714A1 KR 2017005680 W KR2017005680 W KR 2017005680W WO 2018139714 A1 WO2018139714 A1 WO 2018139714A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
signal
interference
terminals
terminal
Prior art date
Application number
PCT/KR2017/005680
Other languages
English (en)
Korean (ko)
Inventor
반태원
조문제
Original Assignee
경상대학교산학협력단
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 경상대학교산학협력단 filed Critical 경상대학교산학협력단
Publication of WO2018139714A1 publication Critical patent/WO2018139714A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the following embodiments relate to an apparatus and method for performing uplink scheduling in a TDD cellular network, and more particularly, to an apparatus and method for performing uplink scheduling based on an amount of inter-cell interference transmitted from a terminal to another cell.
  • next-generation mobile communication network In a next-generation mobile communication network, a large number of base stations are arranged in a narrow space, thereby increasing space reuse rate, and thus, data transmission capacity may be significantly improved.
  • space reuse rate increases in the wireless network
  • interference between users or base stations in the network increases rapidly, resulting in a decrease in frequency efficiency.
  • the location of the base station is fixed and the transmitter directly performs various transmission control functions. Therefore, it is easy to cope with such an interference situation, while in the uplink where the terminal is the transmitter, the position of the transmitter is a cell. Not only does it change every moment, but since the terminal serving as a transmitter and the base station performing the transmission control function are separated, performance deterioration due to interference becomes apparent.
  • the max signal-to-noise ratio (SNR) scheduling scheme which considers only channel information with a base station to which a terminal is connected, does not consider any interference effect on a neighboring cell in uplink and performs the performance of the entire network due to interference. The degradation is more serious.
  • SNR signal-to-noise ratio
  • the purpose of the following embodiments is to perform uplink scheduling with a small amount of computation.
  • the purpose of the following embodiments is to perform uplink scheduling for more terminals using limited computing resources.
  • a scheduling apparatus for performing uplink scheduling for a plurality of terminals located in a cell, a strength of a signal transmitted by the plurality of terminals to a base station of the cell and a plurality of adjacent terminals Among the interference signals transmitted to the cell, the plurality of terminals based on the receiver and the received signal-to-interference ratios, respectively, for receiving signal-to-interference ratios calculated based on the largest interference signal having the greatest strength from the plurality of terminals.
  • a scheduling apparatus including a scheduling unit configured to determine a time interval for performing uplink scheduling for the plurality of terminals to transmit the uplink data to the base station in the cell.
  • the maximum interference signal may be estimated based on the strength of pilot signals received by the terminals from the plurality of adjacent cells.
  • the apparatus may further include a scheduling information transmitter configured to transmit the information about the determined time interval to the plurality of terminals.
  • the uplink data may be transmitted from the terminal to the base station in the cell during the determined time interval.
  • the uplink and the downlink at which the terminals receive data from the base station may be divided in time-division duplex.
  • a terminal located in a first cell strength of uplink interference signals transmitted by the terminal to a second cell adjacent to the first cell and a third cell adjacent to the first cell is increased.
  • An interference signal strength estimator for estimating the strength of the strongest interference signal
  • a calculator for calculating a signal-to-interference ratio based on the strength of the signal transmitted from the terminal to the first cell and the strength of the interference signal having the strongest intensity
  • Information about a time interval for transmitting the uplink data to the base station of the first cell the terminal is determined based on the transmission unit for transmitting the calculated signal-to-interference ratio to the scheduling apparatus of the first cell and the transmitted signal-to-interference ratio
  • a scheduling information receiving unit for receiving the link information, wherein the transmitting unit stores the link data during a time interval for transmitting the uplink data.
  • the terminal transmitting to the base station of the first cell is provided.
  • the uplink and the downlink at which the terminals receive data from the base station may be divided in time-division duplex.
  • the apparatus may further include a pilot receiver configured to receive a first pilot signal from a second cell adjacent to the first cell and receive a second pilot signal from a third cell adjacent to the first cell.
  • a pilot receiver configured to receive a first pilot signal from a second cell adjacent to the first cell and receive a second pilot signal from a third cell adjacent to the first cell.
  • the strength of the uplink interference signal transmitted to the second cell and the third cell may be estimated based on the strength of the first pilot signal and the strength of the second pilot signal.
  • the scheduling method of performing uplink scheduling for a plurality of terminals located in a cell the strength of a signal transmitted by the plurality of terminals to a base station of the cell and the terminals are adjacent to each other.
  • a scheduling method is provided including performing uplink scheduling for terminals to determine a time interval during which the plurality of terminals transmit uplink data to a base station in the cell.
  • the maximum interference signal may be estimated based on the strength of pilot signals received by the terminals from the plurality of adjacent cells.
  • the method may further include transmitting information on the determined time interval to the plurality of terminals.
  • the uplink data may be transmitted from the terminal to the base station in the cell during the determined time interval.
  • the uplink and the downlink at which the terminals receive data from the base station may be divided in time-division duplex.
  • terminals in a TDD cellular network can perform uplink scheduling with less energy consumption.
  • terminals in a TDD cellular network may perform uplink scheduling using limited computing resources.
  • FIG. 1 is a diagram illustrating a concept in which a terminal located in a first cell transmits uplink interference to base stations of a second cell and a third cell adjacent to the first cell.
  • FIG. 2 is a flowchart illustrating a method of performing uplink scheduling step by step according to an exemplary embodiment.
  • FIG 3 illustrates a concept in which a terminal located in each cell transmits uplink interference to a base station of an adjacent cell.
  • FIG. 4 is a block diagram illustrating a structure of an uplink scheduling apparatus according to an exemplary embodiment.
  • Fig. 5 is a flowchart illustrating step by step an uplink scheduling method according to an exemplary embodiment.
  • Fig. 6 is a block diagram showing the structure of a terminal according to an exemplary embodiment.
  • a scheduling apparatus for performing uplink scheduling for a plurality of terminals located in a cell, a strength of a signal transmitted by the plurality of terminals to a base station of the cell and a plurality of adjacent terminals Among the interference signals transmitted to the cell, the plurality of terminals based on the receiver and the received signal-to-interference ratios, respectively, for receiving signal-to-interference ratios calculated based on the largest interference signal having the greatest strength from the plurality of terminals.
  • a scheduling apparatus including a scheduling unit configured to determine a time interval for performing uplink scheduling for the plurality of terminals to transmit the uplink data to the base station in the cell.
  • the maximum interference signal may be estimated based on the strength of pilot signals received by the terminals from the plurality of adjacent cells.
  • the apparatus may further include a scheduling information transmitter configured to transmit the information about the determined time interval to the plurality of terminals.
  • the uplink data may be transmitted from the terminal to the base station in the cell during the determined time interval.
  • the uplink and the downlink at which the terminals receive data from the base station may be divided in time-division duplex.
  • a terminal located in a first cell strength of uplink interference signals transmitted by the terminal to a second cell adjacent to the first cell and a third cell adjacent to the first cell is increased.
  • An interference signal strength estimator for estimating the strength of the strongest interference signal
  • a calculator for calculating a signal-to-interference ratio based on the strength of the signal transmitted from the terminal to the first cell and the strength of the interference signal having the strongest intensity
  • Information about a time interval for transmitting the uplink data to the base station of the first cell the terminal is determined based on the transmission unit for transmitting the calculated signal-to-interference ratio to the scheduling apparatus of the first cell and the transmitted signal-to-interference ratio
  • a scheduling information receiving unit for receiving the link information, wherein the transmitting unit stores the link data during a time interval for transmitting the uplink data.
  • the terminal transmitting to the base station of the first cell is provided.
  • the uplink and the downlink at which the terminals receive data from the base station may be divided in time-division duplex.
  • the apparatus may further include a pilot receiver configured to receive a first pilot signal from a second cell adjacent to the first cell and receive a second pilot signal from a third cell adjacent to the first cell.
  • a pilot receiver configured to receive a first pilot signal from a second cell adjacent to the first cell and receive a second pilot signal from a third cell adjacent to the first cell.
  • the strength of the uplink interference signal transmitted to the second cell and the third cell may be estimated based on the strength of the first pilot signal and the strength of the second pilot signal.
  • the scheduling method of performing uplink scheduling for a plurality of terminals located in a cell the strength of a signal transmitted by the plurality of terminals to a base station of the cell and the terminals are adjacent to each other.
  • a scheduling method is provided including performing uplink scheduling for terminals to determine a time interval during which the plurality of terminals transmit uplink data to a base station in the cell.
  • the maximum interference signal may be estimated based on the strength of pilot signals received by the terminals from the plurality of adjacent cells.
  • the method may further include transmitting information on the determined time interval to the plurality of terminals.
  • the uplink data may be transmitted from the terminal to the base station in the cell during the determined time interval.
  • the uplink and the downlink at which the terminals receive data from the base station may be divided in time-division duplex.
  • FIG. 1 is a diagram illustrating a concept in which a terminal located in a first cell transmits uplink interference to base stations of a second cell and a third cell adjacent to the first cell. Although only three base stations 111, 121, 131 and three cells 110, 120, 130 are illustrated in FIG. 1, the exemplary embodiment may be applied to a large wireless network including K base stations and cells.
  • each cell 110, 120, 130 includes a base station 111, 121, 131, and each base station 111, 121, 131 is a terminal located within the cell 110, 120, 130. Only the transmission control of the fields 112, 122, and 132 is performed. Time-division duplex distinguishes the downlink (downlink, forward link) and uplink (uplink, reverse link) in which each of the base stations 111, 121, and 131 communicates with the terminals 112, 122, and 132. do.
  • the first terminal 112 located in the first cell 110 may transmit uplink data to the first base station 111.
  • the uplink data transmitted by the first terminal 112 is transmitted not only to the first base station 111 but also to the second base station 121 of the second cell 120.
  • the uplink data transmitted by the first terminal 112 is also transmitted to the third base station 131 of the third cell 130.
  • the third base station 131 is in accordance with the uplink data received by each base station (121, 131) from other terminals Act as interference to If the uplink interference to the base station (121, 131) located in the other cell is increased, the efficiency and performance of the entire communication system is reduced, so preventing this is considered as an important technical issue.
  • FIG. 2 is a flowchart illustrating a method of performing uplink scheduling step by step according to an exemplary embodiment.
  • the cell in which the terminal 230 is located includes a serving base station, and the terminal 230 exchanges data and control information with the serving base station.
  • the cell in which the terminal 230 is located is adjacent to the first neighbor cell including the first neighbor base station 210 and the second neighbor cell including the second neighbor base station 220.
  • the uplink data transmitted by the terminal 230 acts as an interference to the first neighbor base station 210 and the second neighbor base station 220.
  • step 250 the first neighbor base station 210 transmits a first pilot signal and the second neighbor base station 220 transmits a second pilot signal.
  • the terminal 230 receives the first pilot signal and the second pilot signal.
  • step 260 the terminal 230 calculates the strength of the first pilot signal and the second pilot signal, respectively.
  • the terminal 230 measures the strength of an interference signal transmitted by the terminal 230 to a plurality of adjacent base stations 210 and 220 based on the strength of each pilot signal.
  • the power for transmitting the first pilot signal from the first neighboring base station 210 and the power for transmitting the second pilot signal from the second neighboring base station 220 may be known.
  • the terminal 230 uses the strength of the first pilot signal received by the terminal 230 and the power of the first neighboring base station 210 to transmit the first pilot signal, and the first neighboring base station 210 and the terminal 230. Path loss between the channel and channel loss.
  • the terminal 230 uses the downlink state.
  • the state of can be estimated accurately.
  • the terminal 230 transmits uplink data transmitted from the terminal 230 to the base station using the path loss between the first neighboring base station 210 and the terminal 230 and the loss according to the channel state.
  • the magnitude of inter-cell interference may be estimated.
  • the terminal may estimate the magnitude of the inter-cell interference (second uplink interference signal) when the uplink data transmitted from the terminal 230 to the base station is transmitted to the second neighboring base station 220.
  • second uplink interference signal second uplink interference signal
  • the terminal 230 may include a first uplink interference signal transmitted from the terminal 230 to the first neighbor base station 210 and second uplink interference signals transmitted from the terminal 230 to the second neighbor base station 220.
  • the strength of the interference signal having the strongest strength can be estimated.
  • the terminal 230 calculates a signal-to-max generating interference ratio (SmGIR).
  • the signal-to-maximum occurrence interference ratio is defined as the ratio of the largest value among the signals transmitted by the terminal 230 to the serving base station and inter-cell interference transmitted by the terminal 230, and the strength of the signal transmitted by the terminal to the serving base station.
  • a signal-to-interference ratio calculated based on a maximum interference signal having the largest intensity among interference signals transmitted by the terminal to a plurality of adjacent cells.
  • the terminal 230 calculates the signal-to-maximum generation interference ratio by using only the largest interference amount among the plurality of inter-cell interferences generated by the terminal 230.
  • the terminal 230 transmits the signal-to-maximum occurrence interference ratio to the scheduling apparatus of the cell where the terminal 230 is located. According to one side, the terminal 230 may transmit the signal-to-maximum occurrence interference rate to the scheduling device 240 via the serving base station.
  • the scheduling apparatus 240 performs scheduling for the terminal 230 based on the signal-to-maximum occurrence interference ratio received from the terminal 230.
  • the scheduling apparatus 240 may receive the signal-to-maximum interference rate from not only the terminal 230 but also other terminals located in the cell where the terminal 230 is located.
  • the scheduling apparatus 240 selects a terminal having a maximum value of the signal-to-maximum interference rate in a specific time interval as a terminal to transmit data to the serving base station in the specific time interval, and transmits the data among the plurality of terminals.
  • the time interval can be determined.
  • the scheduling apparatus 240 transmits scheduling information including information about the determined time interval to the selected terminal.
  • the terminal that has received the scheduling information may transmit uplink data to the serving base station during the time interval in which the terminal is determined to transmit data.
  • the signal-to-maximum generation interference ratio is calculated using only one interference signal having the largest intensity. Therefore, the calculation of the signal-to-maximum occurrence interference ratio is very simple.
  • the size of the interference signal transmitted by the terminal to a plurality of adjacent base stations is greatly affected by the path loss, the largest interference signal changes much slower than the channel change rate due to fading. Therefore, the calculation burden of the terminal is greatly reduced.
  • the terminals of the small strength of the interference signal transmitted to the adjacent cell is selected to transmit data, the inter-cell interference in the uplink is reduced, the performance and efficiency of the communication system is greatly improved .
  • FIG. 3 illustrates a concept in which a terminal located in each cell transmits uplink interference to a base station of an adjacent cell.
  • a base station of an adjacent cell.
  • the base stations 311, 321, 331 of each cell 310, 320, 330 perform transmission control of the terminals 312, 313, 322, 323, 332, 333 located in the corresponding cells 310, 320, 330. do.
  • the transmit power of all terminals Can be assumed to be the same.
  • Equation 1 the total amount of interference generated by the i-th terminal located in the k-th cell to the adjacent base station.
  • I the total amount of inter-cell interference generated by the i-th terminal located in the k-th cell to the adjacent base station
  • j represents the index of the adjacent base station.
  • the total amount of interference according to Equation 1 above is complicated to calculate and adds to the computational burden on the terminal.
  • the terminal may estimate only one interference having the greatest intensity among inter-cell interferences generated by the terminal as its generated interference amount as follows.
  • the terminal may calculate a signal-to-max generating interference ratio (SmGIR) using its generated interference estimated according to Equation 2.
  • SmGIR signal-to-max generating interference ratio
  • the terminal feeds back the signal-to-occurrence interference ratio to the scheduling apparatus via the base station, and the scheduling apparatus may perform scheduling for the N terminals by using the signal-to-occurrence interference ratio fed back by the N terminals.
  • the scheduling apparatus may select a terminal having the largest value among the signal-to-maximum generation interference ratios fed back by each terminal to transmit data.
  • the terminal selected by the scheduling device k may be expressed by Equation 3 below.
  • the uplink scheduling apparatus 410 includes a receiver 420, a scheduler 430, and a scheduling information transmitter 440.
  • the uplink scheduling apparatus 410 illustrated in FIG. 4 performs uplink scheduling on a plurality of terminals 450 and 460 located in a cell.
  • the receiver 420 receives a signal-to-maximum interference rate from the terminals 450 and 460 in the cell in which the uplink scheduling apparatus 410 is responsible for scheduling.
  • the signal-to-maximum occurrence interference ratio is defined as the ratio of the largest value among signals transmitted by the terminals 450 and 460 to the base station (serving base station) of the corresponding cell and inter-cell interference transmitted by the terminals 450 and 460.
  • the signal-to-interference ratio is calculated based on the largest interference signal having the largest intensity. .
  • the maximum interference signal may be estimated based on the strength of pilot signals received by the terminals 450 and 460 from a plurality of adjacent cells. For example, each of the terminals 450 and 460 may receive a pilot signal from a plurality of adjacent cells and calculate its strength. If transmission power for transmitting pilot signals by a plurality of neighboring base stations is already known, the terminals 450 and 460 may simply estimate the path loss and channel state from each adjacent cell to the terminals 450 and 460. .
  • the uplink scheduling apparatus shown in FIG. 4 assumes a time-division duplex (TDD) case, the uplink and the downlink are symmetrical (eciprocity).
  • the terminal can accurately calculate the strength of the uplink interference signal caused by the corresponding terminals 450 and 460 in the adjacent cells by using the symmetry of the uplink and the downlink.
  • the terminals 450 and 460 may calculate the amount of inter-cell interference caused to a plurality of adjacent cells, respectively, and select a maximum value therefrom to calculate a signal-to-maximum interference rate.
  • the scheduling unit 430 performs uplink scheduling for a plurality of terminals based on the received signal to interference ratio (signal to maximum occurrence interference ratio).
  • the scheduling unit 430 may determine a time interval during which the terminals 450 and 460 transmit uplink data to the base station in the cell.
  • the scheduling unit 430 selects the terminal 450, 460 that transmits the signal-to-maximum interference rate having the largest value among the signal-to-maximum occurrence interference rates fed back by each terminal 450, 460 and selects data. Can be sent.
  • the scheduling information transmitter 440 may transmit scheduling information, including information about the determined time interval, to the terminals 450 and 460. According to one side, uplink data may be transmitted from the determined terminal to the base station of the cell during the time interval determined above.
  • Fig. 5 is a flowchart illustrating step by step an uplink scheduling method according to an exemplary embodiment.
  • the uplink scheduling apparatus receives a signal-to-maximum occurrence interference ratio from terminals in a cell in which the uplink scheduling apparatus is responsible for scheduling.
  • the signal-to-maximum occurrence interference ratio is defined as the ratio of the largest value of the signal transmitted by the terminal to the base station (serving base station) of the cell and the inter-cell interference transmitted by the terminal, and the strength of the signal transmitted by the terminal to the serving base station.
  • a signal-to-interference ratio calculated based on a maximum interference signal having the largest intensity among interference signals transmitted by the terminal to a plurality of adjacent cells.
  • the uplink scheduling method shown in FIG. 5 assumes a time-division duplex (TDD: Time-Division Duplex) case in which the uplink and the downlink are symmetrical.
  • TDD Time-Division Duplex
  • the terminal can accurately calculate the strength of the uplink interference signal caused by the terminal to the adjacent cell by using the symmetry of the uplink and the downlink.
  • the uplink scheduling apparatus performs uplink scheduling for a plurality of terminals based on the received signal-to-interference ratio (signal-to-maximal generation interference ratio).
  • the uplink scheduling apparatus may determine a time interval in which each terminal transmits uplink data to a base station in a cell.
  • the uplink scheduling apparatus may select a terminal that transmits the signal-to-maximum interference occurrence ratio having the largest value among the signal-to-maximum interference interference ratios fed back by each terminal to transmit data.
  • the uplink scheduling apparatus may transmit scheduling information, including information about the determined time interval, to each terminal.
  • uplink data may be transmitted from the determined terminal to the base station of the cell during the time interval determined above.
  • Fig. 6 is a block diagram showing the structure of a terminal according to an exemplary embodiment.
  • the terminal 610 according to an exemplary embodiment includes a pilot receiver 620, an interference signal strength estimator 630, a calculator 640, a transmitter 650, and a receiver 660.
  • the terminal 610 illustrated in FIG. 6 is located in a first cell where the uplink scheduling apparatus 690 performs uplink scheduling.
  • the pilot receiver 620 receives the first pilot signal from the second cell adjacent to the first cell, and receives the second pilot signal from the third cell adjacent to the first cell. According to one side, the pilot receiver 620 receives the first pilot signal from the first neighbor base station 670 responsible for transmission control of the second cell, the second neighbor base station 680 responsible for transmission control of the third cell. ) May receive a second pilot signal.
  • the interference signal strength estimator 630 may estimate the strength of the uplink interference signal transmitted from the terminal 610 to the second cell and the third cell based on the strength of the first pilot signal and the strength of the second pilot signal. .
  • the uplink and the downlink are symmetrical.
  • the terminal can accurately calculate the strength of the uplink interference signal caused by the terminal to the adjacent cell by using the symmetry of the uplink and the downlink.
  • the calculator 640 calculates a signal-to-interference ratio based on the interference signal having the strongest intensity and the strength of the signal transmitted from the terminal 610 to the first cell.
  • the signal-to-interference ratio is defined as the ratio of the largest value among the signals transmitted by the terminal 610 to the base station (serving base station) of the cell and the inter-cell interference transmitted by the terminal 610 to the adjacent cell. It can be called an interference ratio.
  • the transmitter 650 transmits the calculated signal to maximum occurrence interference ratio to the scheduling apparatus 690 of the first cell.
  • the scheduling apparatus 690 of the first cell receives the signal-to-maximum occurrence interference ratios calculated from the plurality of terminals located in the first cell, respectively, and based on the signal-to-maximum occurrence interference ratios, Uplink scheduling is performed for the terminals.
  • the uplink scheduling apparatus 690 may select a terminal that has transmitted the signal-to-maximum interference ratio having the largest value among the signal-to-maximum interference ratios fed back by each terminal to transmit data.
  • the receiver 660 receives scheduling information including information on a time interval in which the terminal 610 transmits uplink data from the uplink scheduling apparatus 690 to the serving base station.
  • the transmitter 650 may transmit uplink data to the base station during the time interval designated for the terminal 610.
  • the method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium.
  • the computer readable medium may include program instructions, data files, data structures, etc. alone or in combination.
  • the program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks.
  • Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.
  • the hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.
  • the signal to the maximum occurrence interference ratio is calculated using only one interference signal having the largest intensity, and the uplink scheduling is performed based on the signal to maximum occurrence interference ratio.
  • Link scheduling scheme is disclosed.
  • the disclosed uplink scheduling technique accurately estimates the strength of an interference signal transmitted from a mobile station to an adjacent base station by using symmetry between uplink and downlink, and performs uplink scheduling by using the uplink scheduling. Inter-cell interference in the link can be greatly reduced.

Abstract

La présente invention concerne un système de programmation de liaison montante calculant un rapport signal/interférence maximale par la seule utilisation d'un signal d'interférence ayant la plus grande intensité parmi des signaux d'interférence transmis à une pluralité de stations de base adjacentes à un terminal, et réalise une programmation de liaison montante sur la base du rapport signal/interférence maximale. Le système de programmation de liaison montante décrit estime avec précision l'intensité d'un signal d'interférence transmis à une station de base adjacente à un terminal par utilisation d'une symétrie entre une liaison montante et une liaison descendante, et réalise une programmation de liaison montante par utilisation de cette dernière de telle sorte que l'interférence intercellulaire peut significativement être réduite à partir de la liaison montante par réalisation d'une programmation efficace uniquement par un calcul simple.
PCT/KR2017/005680 2017-01-25 2017-05-31 Appareil et procédé de programmation de liaison montante dans un réseau cellulaire tdd WO2018139714A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020170011920A KR101906918B1 (ko) 2017-01-25 2017-01-25 Tdd 셀룰러 네트워크에서 상향링크 스케쥴링 장치 및 방법
KR10-2017-0011920 2017-01-25

Publications (1)

Publication Number Publication Date
WO2018139714A1 true WO2018139714A1 (fr) 2018-08-02

Family

ID=62978669

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2017/005680 WO2018139714A1 (fr) 2017-01-25 2017-05-31 Appareil et procédé de programmation de liaison montante dans un réseau cellulaire tdd

Country Status (2)

Country Link
KR (1) KR101906918B1 (fr)
WO (1) WO2018139714A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020036716A1 (fr) * 2018-08-13 2020-02-20 Commscope Technologies Llc Procédé et système de détermination de contribution à un brouillage agrégé par un système de duplexage par répartition dans le temps
US10827444B2 (en) 2018-08-13 2020-11-03 Commscope Technologies Llc Method and system for determining move lists for shared access systems including a time domain duplexing system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090042128A (ko) * 2007-10-24 2009-04-29 한국전자통신연구원 상향링크 스케줄링 방법
KR101229564B1 (ko) * 2006-06-12 2013-02-04 삼성전자주식회사 통신 시스템에서의 인접 섹터 간섭을 고려한 전력 제어 및스케줄링 방법
KR101298546B1 (ko) * 2006-06-27 2013-08-22 한국과학기술원 시분할 복신 시스템에서 시분할 스케줄링 장치 및 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101229564B1 (ko) * 2006-06-12 2013-02-04 삼성전자주식회사 통신 시스템에서의 인접 섹터 간섭을 고려한 전력 제어 및스케줄링 방법
KR101298546B1 (ko) * 2006-06-27 2013-08-22 한국과학기술원 시분할 복신 시스템에서 시분할 스케줄링 장치 및 방법
KR20090042128A (ko) * 2007-10-24 2009-04-29 한국전자통신연구원 상향링크 스케줄링 방법

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHO, MOON JE ET AL.: "A Threshold-based Distributed User Scheduling with Transmit Power Control for Uplink Multi- cell Networks", JOURNAL OF THE KOREA INSTITUTE OF INFORMATION AND COMMUNICATION ENGINEERING, vol. 18, no. 11, 30 November 2014 (2014-11-30), pages 2607 - 2612, XP055534451 *
CHO, MOON JE ET AL.: "Joint User Scheduling and Power Control Considering Both Signal and Interference for Multi- cell Networks", JOURNAL OF THE KOREA INSTITUTE OF INFORMATION AND COMMUNICATION ENGINEERING, vol. 20, no. 3, 31 March 2016 (2016-03-31), pages 477 - 483, XP055534453 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020036716A1 (fr) * 2018-08-13 2020-02-20 Commscope Technologies Llc Procédé et système de détermination de contribution à un brouillage agrégé par un système de duplexage par répartition dans le temps
US10827444B2 (en) 2018-08-13 2020-11-03 Commscope Technologies Llc Method and system for determining move lists for shared access systems including a time domain duplexing system
US11310750B2 (en) 2018-08-13 2022-04-19 Commscope Technologies Llc Method and system for determining transmission power of radios of a time division duplexing system
US11463884B2 (en) 2018-08-13 2022-10-04 Commscope Technologies Llc Method and system for determining an interference contribution from a time division duplexing system
US11595917B2 (en) 2018-08-13 2023-02-28 Commscope Technologies Llc Method and system for determining transmission power of radios of a time division duplexing system

Also Published As

Publication number Publication date
KR20180087640A (ko) 2018-08-02
KR101906918B1 (ko) 2018-10-11

Similar Documents

Publication Publication Date Title
WO2020167000A1 (fr) Procédé et appareil de commande de puissance de transmission d'un équipement utilisateur dans un système de communication sans fil
WO2018186667A1 (fr) Procédé de fonctionnement d2d d'un terminal dans un système de communication sans fil, et terminal utilisant le procédé
WO2011159042A2 (fr) Procédé et appareil de suppression cognitive d'interférence intercellulaire
WO2018097637A1 (fr) Dispositif comprenant une antenne et procédé de commande associé
WO2021029596A1 (fr) Procédé et appareil pour émettre et recevoir une réponse harq dans un système de communication prenant en charge la communication de liaison latérale
WO2014062026A1 (fr) Appareil et procédé s'appliquant à la communication coopérative entre stations de base dans un système de communication sans fil
WO2015133793A1 (fr) Procédé et appareil de mappage d'antennes virtuelles pour un renvoi d'informations de mappage d'antennes virtuelles dans un système entrées multiples sorties multiples (mimo)
WO2021118092A1 (fr) Procédé et appareil de commande de puissance de transmission d'un équipement utilisateur dans un système de communication sans fil
WO2013012295A2 (fr) Procédé et appareil pour émettre et recevoir des informations pour un accès aléatoire dans un système de communication sans fil
WO2011049287A2 (fr) Système de communication pour coordination entre cellules
WO2014175664A1 (fr) Procédé et appareil de commande de la puissance d'une liaison montante dans un système de formation de faisceau
WO2012002660A2 (fr) Procédé et appareil adaptés pour réguler une puissance de transmission dans un réseau sans fil
WO2016013698A1 (fr) Procédé et appareil pour transmettre des signaux de rétroaction
WO2016039586A1 (fr) Procédé de transmission et de réception de signal de référence dans un système de communications sans fil
WO2012043959A1 (fr) Procédé et appareil d'alignement de brouillage à l'aide d'un index d'action directe dans un système de communication cellulaire hiérarchique
WO2016043519A1 (fr) Procédé et appareil de planification dans système de communication sans fil
WO2010150970A1 (fr) Système de communication permettant la gestion répartie du brouillage au moyen d'un message de rétroaction
WO2011049398A2 (fr) Système de communication pour détecter un terminal affecté et assurer la coordination d'interférence dans des environnements multi-cellule
WO2016010396A1 (fr) Dispositif et procédé de synchronisation de liaison montante d'un système de communication sans fil
WO2021033945A1 (fr) Procédé de configuration de ressource de liaison latérale dans un système de communication
WO2016043352A1 (fr) Procédé et dispositif consistant à atténuer une interférence intercellulaire
WO2013137635A1 (fr) Procédé et appareil permettant de réguler la puissance de transmission dans le sens montant d'un équipement utilisateur
WO2013115601A1 (fr) Procédé et appareil d'alignement d'interférences dans un système de communication sans fil
WO2016167466A1 (fr) Dispositif de terminal et procédé de fonctionnement de dispositif de terminal
WO2012020995A2 (fr) Appareil et procédé de transmission et de réception de signaux dans un système de communication mobile

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: 17894217

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: 17894217

Country of ref document: EP

Kind code of ref document: A1