WO2017204551A1 - Procédé et appareil de coordination des brouillages entre cellules - Google Patents

Procédé et appareil de coordination des brouillages entre cellules Download PDF

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Publication number
WO2017204551A1
WO2017204551A1 PCT/KR2017/005398 KR2017005398W WO2017204551A1 WO 2017204551 A1 WO2017204551 A1 WO 2017204551A1 KR 2017005398 W KR2017005398 W KR 2017005398W WO 2017204551 A1 WO2017204551 A1 WO 2017204551A1
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WIPO (PCT)
Prior art keywords
urllc
frequency
time
subframe
interference coordination
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PCT/KR2017/005398
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English (en)
Inventor
Jingxing Fu
Bin Yu
Chen QIAN
Qi XIONG
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Samsung Electronics Co., Ltd.
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Publication date
Priority claimed from CN201610697101.8A external-priority patent/CN107426819B/zh
Application filed by Samsung Electronics Co., Ltd. filed Critical Samsung Electronics Co., Ltd.
Publication of WO2017204551A1 publication Critical patent/WO2017204551A1/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
    • H04J11/0053—Interference mitigation or co-ordination of intercell interference using co-ordinated multipoint transmission/reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection

Definitions

  • the present invention relates to wireless communications techniques, more particularly to an inter-cell interference coordinating method and apparatus for physical uplink channel.
  • the 5G or pre-5G communication system is also called a ‘Beyond 4G Network’ or a ‘Post Long Term Evolution (LTE) System’.
  • the 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 28GHz or 60GHz bands, so as to accomplish higher data rates.
  • mmWave e.g., 28GHz or 60GHz bands
  • MIMO massive multiple-input multiple-output
  • FD-MIMO Full Dimensional MIMO
  • array antenna an analog beam forming, large scale antenna techniques are discussed in 5G communication systems.
  • RANs Cloud Radio Access Networks
  • D2D device-to-device
  • wireless backhaul moving network
  • cooperative communication Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like.
  • CoMP Coordinated Multi-Points
  • FSK Hybrid frequency shift keying
  • FQAM quadrature amplitude modulation
  • SWSC sliding window superposition coding
  • ACM advanced coding modulation
  • FBMC filter bank multi carrier
  • NOMA non-orthogonal multiple access
  • SCMA sparse code multiple access
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • PRB physical resource block
  • HII and OI are applicable for all uplink subframes and merely one set of interference coordination information consisting of HII and OI needs to be transmitted between base stations.
  • one set of interference coordination information needs to be transmitted between cells, including HII and OI, it is also required to transmit the uplink subframes included in the uplink subframe set.
  • a set of interference coordination information needs to be transmitted between cells, including OI, and it is required to transmit the uplink subframes included in the uplink subframe set.
  • the HII and the OI describe the interference degree taking PRB as a unit. Detailed parameters are shows in Table 1.
  • HII describes the interference tolerance degree by PRBs.
  • the detailed parameters are shown in Table 2, wherein one bit is used for indicating the interference sensitivity of each PRB.
  • the subcarrier spacing may be different, and the PRB width and the subframe length may also be different. In this case, research on interference coordination between cells is required.
  • Embodiments of the present disclosure provide an inter-cell interference coordinating method and apparatus, so as to implement better interference coordination between cells with different resource allocation manners for uplink scheduling.
  • a method for operating a base station in a wireless communication system including:
  • the determining the interference coordination information format includes:
  • determining a uniform frequency-domain reporting unit for the interference coordination information if the interference coordination information includes overload indication (OI), the total number of PRBs for reporting the interference coordination information is determined based on the uniform frequency-domain reporting unit;
  • OFI overload indication
  • the interference coordination information includes OI, the total number of PRBs for reporting the interference coordination information is determined according to frequency-domain reporting units determined in different frequency bands;
  • both the interference coordination information format and the interference coordination information includes the frequency-domain reporting unit.
  • the determining the uniform frequency-domain reporting unit of the interference coordination information includes at least one of:
  • the determining the frequency-domain reporting unit of the interference coordination information of the respective frequency band includes: taking the PRB width of each frequency band as the frequency-domain reporting unit of the interference coordination information of the corresponding frequency band.
  • a method for operating a base station in a wireless communication system including:
  • URLLC subframe is used for transmitting URLLC data and control information.
  • the transmitting the indication information of the determined time-frequency position to the neighboring cell includes:
  • the respectively transmitting the indication information of the time-frequency position on which the URLLC downlink subframe is transmitted, the time-frequency position on which the URLLC uplink subframe is transmitted and/or the time-frequency position on which the URLLC mixed subframe is transmitted to the neighboring cell includes:
  • type indication information includes: non-URLLC subframe type, URLLC downlink subframe type, URLLC uplink subframe type, or URLLC mixed subframe type;
  • the respectively transmitting the indication information of the time-frequency position on which the URLLC downlink subframe is transmitted, the time-frequency position on which the URLLC uplink subframe is transmitted, the time-frequency position on which the first type mixed URLLC subframe is transmitted and/or the time-frequency position on which the second type mixed URLLC subframe is transmitted to the neighboring cell includes:
  • type indication information includes: non-URLLC subframe type, URLLC downlink subframe type, URLLC uplink subframe type, first type URLLC mixed subframe type, or second type URLLC mixed subframe type;
  • the transmitting the time-frequency position on which the URLLC subframe is transmitted to the neighboring cell includes:
  • type indication information of each subframe periodically transmitting type indication information of each subframe to the neighboring cell, wherein the type indication information includes non-URLLC subframe type and URLLC subframe type;
  • the transmitting the position of the URLLC resources in the frequency-domain to the neighboring cell includes:
  • each defined frequency-domain indication unit belongs to the URLLC resources via a bitmap
  • the URLLC resources are continuous in the frequency-domain, transmitting a starting PRB pair position and number of occupied PRBs of the URLLC resources to the neighboring cell.
  • the transmitting the PRB pair starting position and the number of occupied PRBs of the URLLC resources to the neighboring cell includes:
  • L CRBs denotes the number of continuous PRBs occupied by the URLLC resources in the frequency-domain
  • N denotes an entire system bandwidth
  • a method for operating a base station in a wireless communication system including:
  • URLLC subframe is used for transmitting URLLC data and control information.
  • the decreasing the interference to the neighboring cell on the time-frequency position includes:
  • the decreasing the signal transmit power on the time-frequency position includes:
  • the independent power control parameter is configured by higher layer signaling
  • the base station decreasing transmit power of channel state information-reference signal (CSI-RS) and data on the time-frequency position, or, the base station configuring an independent ratio Pc between a CSI-RS power used for calculating CSI and a PDSCH power, to decrease the transmit power of the data.
  • CSI-RS channel state information-reference signal
  • the adopting the beam forming serving cell-center users on the time-frequency position and adopting the beam forming serving cell-edge users on the other time-frequency positions includes:
  • the base station configuring different PMI codebook constraints for the time-frequency position and the other time-frequency positions except for the time-frequency position, to ensure that the beam forming serving the cell-center users is adopted on the time-frequency position and the beam forming serving the cell-edge users is adopted on the other time-frequency positions except for the time-frequency position;
  • PMI precoding matrix indicator
  • the base station configuring different CSI-RS processes for the time-frequency position and the other time-frequency positions; for the CSI-RS process corresponding to the time-frequency position, a PMI adopted by the corresponding time-frequency resources has a down-tilt angle larger than a predefined threshold; for the other time-frequency positions, a PMI adopted by the corresponding time-frequency resources has a down-tilt angle equal to or smaller than the predefined threshold;
  • a CSI report is obtained through measuring CSI-RS, and the CSI-RS is precoded according to different PMIs, the base station configuring the same CSI-RS process but configuring different resource constraints for the time-frequency position and the other time-frequency positions; for time-frequency resources on the time-frequency position, a PMI adopted by each CSI-RS resource included in the CSI-RS process has a down-tilt angle larger than a predefined threshold; for time-frequency resources on the other time-frequency positions, a PMI adopted by each CSI-RS resource in the CSI-RS process has a down-tilt angle equal to or smaller than the predefined threshold.
  • An apparatus for a base station in a wireless communication system including: a transceiver and at least one processor operatively coupled to the transceiver; wherein
  • the at least one processor is configured to determine an interference coordination information format according to uplink resource allocation of a terminal; and determine interference coordination information according to the determined interference coordination information format, and the transceiver is configured to transmit the interference coordination information between neighboring base stations.
  • An apparatus for a base station in a wireless communication system including: a transceiver and at least one processor operatively coupled to the transceiver; wherein
  • the at least one processor is configured to determine a time-frequency position on which a ultra-reliable low-latency communication (URLLC) subframe is transmitted in a present cell;
  • URLLC ultra-reliable low-latency communication
  • the transceiver is configured to transmit indication information of the determined time-frequency position to a neighboring cell to indicate the neighboring cell to decrease interference to the present cell on the time-frequency position;
  • URLLC subframe is used for transmitting URLLC data and control information.
  • An apparatus for a base station in a wireless communication system including: a transceiver and at least one processor operatively coupled to the transceiver;
  • the transceiver is configured to receive indication information of a time-frequency position on which a ultra-reliable low-latency communication (URLLC) subframe is transmitted from a neighboring cell;
  • URLLC ultra-reliable low-latency communication
  • the at least one processor is configured to decrease interference to the neighboring cell on the time-frequency position
  • URLLC subframe is used for transmitting URLLC data and control information.
  • the interference coordination information format is determined according to the uplink resource allocation of the terminal, and the interference coordination information is transmitted between neighboring base stations according to the determined format.
  • the interference coordination information is transmitted between neighboring base stations according to the determined format.
  • FIG. 1 is a flowchart illustrating an inter-cell interference coordinating method according to some embodiments of the present disclosure.
  • FIG. 2 is a schematic diagram illustrating a first scenario according to embodiment 1 of the present disclosure.
  • FIG. 3 is a schematic diagram illustrating a second scenario according to embodiment 2 of the present disclosure.
  • FIG. 4 is a schematic diagram illustrating a third scenario according to embodiment 3 of the present disclosure.
  • FIG. 5 is a schematic diagram illustrating an example in which the interference coordination information corresponds to merely a part of the bandwidth according to embodiment 2 of the present disclosure.
  • FIG. 6 is a schematic diagram illustrating subframes having different lengths in the time-domain according to embodiment 3 of the present disclosure.
  • FIG. 7 is a schematic diagram illustrating an example that neighboring cells have subframes with different lengths according to embodiment 3 of the present disclosure.
  • FIG. 8 is a first schematic diagram illustrating indication of uplink subframe set according to embodiment 3 of the present disclosure.
  • FIG. 9 is a schematic diagram illustrating uplink subframes with not completely the same lengths according to embodiment 3 of the present disclosure.
  • FIG. 10 is a second schematic diagram illustrating indication of uplink subframe set according to embodiment 3 of the present disclosure.
  • FIG. 11 is a third schematic diagram illustrating indication of uplink subframe set according to embodiment 3 of the present disclosure.
  • FIG. 12 is a schematic diagram illustrating a subframe structure including URLLC data and control information according to some embodiments of the present disclosure.
  • FIG. 13 is a schematic diagram illustrating a ultra-reliable low-latency communication (URLLC) mixed subframe according to some embodiments of the present disclosure.
  • URLLC ultra-reliable low-latency communication
  • FIG. 14 is a schematic diagram illustrating a URLLC frequency-domain resource indication unit according to some embodiments of the present disclosure.
  • FIG. 15 is a schematic diagram illustrating centralized URLLC bands according to some embodiments of the present disclosure.
  • FIG. 16 is a schematic diagram illustrating a first type URLLC mixed subframe according to some embodiments of the present disclosure.
  • FIG. 17 is a schematic diagram illustrating a second type URLLC mixed subframe according to some embodiments of the present disclosure.
  • FIG. 18 is a first schematic diagram illustrating a fourth processing method according to embodiment 5 of the present disclosure.
  • FIG. 19 is a second schematic diagram illustrating the fourth processing method according to embodiment 5 of the present disclosure.
  • FIG. 20 is a third schematic diagram illustrating the fourth processing method according to embodiment 5 of the present disclosure.
  • FIG. 21 is a fourth schematic diagram illustrating the fourth processing method according to embodiment 5 of the present disclosure.
  • FIG. 22 is a fifth schematic diagram illustrating the fourth processing method according to embodiment 5 of the present disclosure.
  • FIG. 23 is a first schematic diagram illustrating a basic structure of an interference coordination information transmitting apparatus according to some embodiments of the present disclosure.
  • FIG. 24 is a second schematic diagram illustrating a basic structure of an interference coordination information transmitting apparatus according to some embodiments of the present disclosure.
  • FIG. 25 is a third schematic diagram illustrating a basic structure of an interference coordination information transmitting apparatus according to some embodiments of the present disclosure.
  • the interference coordination information transmitted between base stations is obtained via interference measurement on uniform sized physical resource blocks (PRBs).
  • PRBs physical resource blocks
  • the interference coordination information is determined and transmitted according to the uplink resource allocation of the UE, such that the interference coordination information is applicable for different uplink resource allocation schemes (including different PRB sizes).
  • the present disclosure provides an inter-cell interference coordinating method. As shown in FIG. 1, the method includes the following.
  • a base station determines an interference coordination information format according to uplink resource allocation of the UE.
  • the uplink resource allocation of a user equipment may include an uplink resource allocation unit, type of information transmitted by the uplink resource and/or different interference coordination requirements of the uplink resource, etc.
  • the uplink resource allocation unit may include a frequency-domain resource allocation unit of the UE.
  • the uplink resource allocation unit may also include a time-domain resource allocation unit of the UE.
  • the interference coordination information format may include a frequency-domain reporting unit for the interference coordination information.
  • the frequency-domain reporting unit for the interference coordination information is one physical resource block of bandwidth 180kHz, and the width of each physical resource block in the frequency-domain is the same.
  • the interference coordination information format may also include a length in the time-domain.
  • the time-domain reporting unit for the interference coordination information is one subframe of length 1ms.
  • the interference coordination information format may further include an interference coordination information type.
  • the uplink interference coordination information type includes overload indication (OI) and high interference indication (HII).
  • the base station determines interference coordination information according to the interference coordination information format, and transmits the interference coordination information to a neighboring base station.
  • interference coordination information format After the interference coordination information format is determined, interference is measured according to the frequency-domain reporting unit and time-domain length of the interference coordination information in the format, the interference coordination information is determined and is transmitted to the neighboring base station.
  • the interference coordination information is transmitted, if the two uplink subframe sets of eIMTA are introduced, the uplink subframes included in the two uplink subframe sets need to be transmitted between the neighboring base stations.
  • the inter-cell interference coordinating method is described with reference to following scenarios respectively.
  • Scenario 1 in the same serving cell, in orthogonal frequency division multiplexing (OFDM) symbols of the same uplink subframe, different frequency bands have different subcarrier spacing, as shown in FIG. 2.
  • OFDM orthogonal frequency division multiplexing
  • Scenario 2 in the same serving cell, in OFDM symbols of the same uplink subframe, all frequency bands have the same subcarrier spacing; in the same serving cell, in OFDM symbols of different uplink subframes, different frequency bands have different subcarrier spacing, as shown in FIG. 3.
  • different uplink subframes transmit different types of information.
  • some uplink subframes transmit data, whereas other subframes transmit control information such as hybrid automatic repeat request - acknowledgement (HARQ-ACK).
  • HARQ-ACK hybrid automatic repeat request - acknowledgement
  • the PRB is regarded as a basic unit for uplink frequency-domain scheduling, the bandwidth is 180kHz at present and may vary in the future.
  • the PRBs in different frequency bands allocated to the UE may have different widths.
  • several inter-cell interference coordinating methods are provided with respect to this scenario.
  • the interference coordination information transmitted by the base station has the same frequency-domain reporting unit in the entire system bandwidth.
  • the PRB width of subband 1 is 180kHz
  • the PRB width of subband 2 is 360kHz.
  • the uniform frequency-domain reporting unit may be determined according to the following manners.
  • the interference coordination information is reported taking the minimum PRB width among frequency bands having different PRB widths in the system bandwidth as a unit, and a total number of PRBs is calculated taking the minimum PRB width as a unit. For example, there are two PRB widths in the system bandwidth, one is PRB width 180kHz of subband 1, the other is PRB width 360kHz of subband 2. Thus, the frequency-domain reporting unit for the interference coordination information is 180kHz. If the interference coordination information includes OI, the total number of sequences of the interference coordination information is the multiples of the entire system bandwidth relative to the PRB width 180kHz. If the interference coordination information is OI, the details are as shown in FIG. 3. For the HII, the corresponding PRB width is 180kHz. Meanwhile, the interference coordination information should include a detailed value of the interference coordination information frequency-domain reporting unit, e.g., PRB width or subcarrier spacing.
  • the interference coordination information is reported taking a maximum PRB width among bands with different PRB widths in the system bandwidth as a unit, and the total number of PRBs is calculated according to the maximum PRB width in the system bandwidth. For example, there are two PRB widths in the system bandwidth, one is PRB width 180kHz of subband 1, and the other is PRB width 360kHz of subband 2.
  • the frequency-domain reporting unit for the interference coordination information is 360kHz. If the interference coordination information includes OI, the total number of sequences of the interference coordination information is the multiples of the entire system bandwidth relative to the PRB width 360kHz. If the interference coordination information includes OI, as shown in FIG. 4, the OI frequency-domain reporting unit is 360kHz. For the HII, the frequency-domain reporting unit is 360kHz. Meanwhile, the interference coordination information should include the detailed value of the frequency-domain reporting unit of the interference coordination information, e.g., PRB width or subcarrier spacing.
  • the interference coordination information is reported taking a least common multiple of multiple PRB widths in the system bandwidth as a unit, and the total number of PRBs is calculated based on the least common multiple of multiple PRB widths. For example, there are two PRB widths in the system bandwidth, one is PRB width 360kHz of subband 1, and the other is PRB width 900kHz of subband 2. Thus, the frequency-domain reporting unit for the interference coordination information is the least common multiple 1800kHz of 360kHz and 900kHz. If the interference coordination information includes OI, the total number of sequences of the interference coordination information is the multiples of the entire system bandwidth relative to the PRB width 1800kHz. If the interference coordination information is OI, the details are as shown in Table 5. For the HII, the PRB width for the reporting is 1800kHz. Meanwhile, the interference coordination information should include a detailed value of the frequency-domain reporting unit for the interference coordination information, e.g., PRB width or subcarrier spacing.
  • the interference coordination information is reported taking a predefined PRB width A as a unit, and the total number of PRBs is calculated based on the predefined PRB width A.
  • the PRB width of subband 1 is 360kHz
  • the PRB width of subband 2 is 720kHz
  • the predefined PRB width is 180kHz.
  • the frequency-domain reporting unit for the interference coordination information is 180kHz. If the interference coordination information includes OI, the total number of sequences of the interference coordination information is the multiples of the entire system bandwidth relative to the 180kHz PRB width.
  • the reported interference coordination information may include any one or any combination of OI and HII.
  • the frequency-domain reporting unit of the interference coordination information transmitted by the base station in the entire system bandwidth is determined respectively according to the PRB width in each frequency band, i.e., the frequency-domain reporting unit of the interference coordination information in each frequency band is equal to the PRB width in the corresponding frequency band.
  • the PRB width of frequency band 1 is 180kHz
  • the PRB width of frequency band 2 is 360kHz.
  • the frequency-domain reporting unit for the interference coordination information of frequency band 1 is 180kHz
  • the frequency-domain reporting unit for the interference coordination information of frequency band 2 is 360kHz, as shown in Table 6.
  • the interference coordination information may include OI and HII or include any one of OI and HII.
  • the interference coordination information should include a detailed value for the frequency-domain reporting unit of the interference coordination information, e.g., PRB width or subcarrier spacing, and different PRB widths or subcarrier spacing need to be reported for different subbands.
  • the PRBs allocated to the UE may have different widths in the frequency-domain.
  • several inter-cell interference coordinating methods are provided with respect to this scenario.
  • the frequency-domain reporting unit of the interference coordination information in different uplink subframes transmitted by the base station remains the same.
  • the PRB width in uplink subframe set 1 is 180kHz
  • the PRB width in uplink subframe set 2 is 360kHz.
  • the uplink subframe set is defined as follows: subframes with the same PRB width in the frequency-domain belong to the same uplink subframe set, and subframes with different PRB widths in the frequency-domain belong to different uplink subframe sets. In this scenario, the meaning of the uplink subframe set remains the same and is not repeated in the following.
  • the uplink subframe set described herein is different from the two uplink subframe sets with eIMTA mentioned in the background.
  • the uniform frequency-domain reporting unit may be determined according to the following manners.
  • the minimum PRB width in the frequency-domain among the PRBs in different uplink subframe sets is taken as the frequency-domain reporting unit to report the interference coordination information.
  • the frequency-domain reporting unit of the interference coordination information is 180kHz.
  • the maximum PRB width in the frequency-domain among the PRBs in different uplink subframe sets is taken as the frequency-domain reporting unit to report the interference coordination information.
  • the frequency-domain reporting unit of the interference coordination information is 360kHz.
  • a least common multiple of multiple PRB widths in the frequency-domain in different uplink subframe sets is taken as the frequency-domain reporting unit to report the interference coordination information.
  • the frequency-domain reporting unit of the interference coordination information is 1800kHz.
  • a predefined physical resource block width may be taken as the unit to report the interference coordination information.
  • there are two PRB widths in different uplink subframes one is PRB width 360kHz of uplink subframe set 1, and the other is PRB width 720kHz of uplink subframe set 2, and the predefined PRB width is 180kHz.
  • the frequency-domain reporting unit of the interference coordination information is 180kHz.
  • the interference coordination information may include OI and HII or include any one of OI and HII.
  • the frequency-domain reporting unit of the interference coordination information in each uplink subframe set transmitted by the base station is determined respectively according to the PRB width of the corresponding uplink subframe set, i.e., the frequency-domain reporting unit of the interference coordination information in each uplink subframe set is equal to the PRB width in the frequency-domain of the uplink subframe set.
  • the PRB width of uplink subframe set 1 is 180kHz
  • the PRB width of uplink subframe set 2 is 360kHz.
  • the frequency-domain reporting unit of the interference coordination information of uplink subframe set 1 is 180kHz
  • the frequency-domain reporting unit of the interference coordination information of uplink subframe set 2 is 360kHz.
  • the interference coordination information may include OI and HII or include any one of OI and HII.
  • the time-domain length of different uplink subframes may be different.
  • several inter-cell interference coordinating method are provided with respect to this scenario.
  • the base station transmits a same set of interference coordination information.
  • This same set of interference coordination information may be obtained through measuring the interference of the uplink subframe set with the maximum time-domain length; or obtained through measuring the interference of the uplink subframe set with the minimum time-domain length, or through measuring the interference of the uplink subframe sets with various time-domain lengths and combining all measurement results.
  • the uplink subframe set is defined as follows: subframes with the same time-domain length belong to the same uplink subframe set, and subframes with different time-domain lengths belong to different uplink subframe sets.
  • the definition of the uplink subframe set remains the same in this scenario and is not repeated in the following.
  • the uplink subframe set is different from the two uplink subframe sets with eIMTA mentioned in the background.
  • the base station respectively transmits one set of interference coordination information for the uplink subframe set corresponding to each length.
  • the interference coordination information is obtained through measuring the interference of the corresponding uplink subframe set.
  • the subframe time-domain length of uplink subframe set 1 is 1ms
  • the subframe time-domain length of uplink subframe set 2 is 0.25ms.
  • the interference coordination information of uplink subframe set 1 is obtained through measuring the interference in the uplink subframes of the uplink subframe set 1
  • the interference coordination information of uplink subframe set 2 is obtained through measuring the interference in uplink subframes of the uplink subframe set 2.
  • the interference coordination information may include OI and HII or include any one of OI and HII, and the interference coordination information of different uplink subframe sets may include different contents. For example, it may include OI and HII for the uplink subframe set 1, whereas it may include merely the HII for the uplink subframe set 2.
  • different uplink subframes transmit different types of information. For example, some uplink subframes transmit data, and some uplink subframes transmits control information, etc. Even if what is transmitted by both uplink subframes is data, different data types may be regarded as different information types, e.g., data may be divided into different types of information according to their importance.
  • the base station transmits the same set of interference coordination information. It is possible to measure the interference of all uplink subframe sets transmitting various types of information and determine the interference coordination information by combining all measurement results.
  • the uplink subframe set may be defined as follows: subframes transmitting the same type of information belong to the same uplink subframe set, and subframes transmitting different types of information belong to different uplink subframe sets. The definition of the uplink subframe set remains the same in this situation and is not repeated in the following.
  • the uplink subframe set defined herein is different from the two uplink subframe sets with eIMTA mentioned in the background.
  • the base station transmits one set of interference coordination information respectively for each uplink subframe set.
  • uplink subframe set 1 transmits data and uplink subframe set 2 transmits control information.
  • the interference coordination information of the uplink subframe set 1 may be obtained through measuring the interference in the uplink subframes of uplink subframe set 1
  • the interference coordination information of the uplink subframe set 2 may be obtained through measuring the interference in the uplink subframes of uplink subframe set 2.
  • the interference coordination information may include OI and HII or include any one or OI and HII, and the interference coordination information of different uplink subframe sets may include different contents. For example, it may include OI and HII for the uplink subframe set 1.
  • It may include merely the HII for the uplink subframe set 2.
  • neighboring cells may occupy different frequency-domain resources to transmit control information, which helps to reduce the inter-cell interference to the control information.
  • It may also include merely the OI or include OI and HII for the uplink subframe set 2.
  • the determined interference coordination information may have different formats, which is described in this embodiment.
  • the interference coordination information transmitted by the base station is obtained based on the physical resource blocks in this partial bandwidth. That is to say, the interference coordination information corresponds to merely a part of the entire system bandwidth.
  • the total number of PRBs included in the interference coordination information is the total number of PRBs in the partial bandwidth corresponding to the interference coordination information, as shown in FIG. 5.
  • the entire system bandwidth includes two parts: subband 1 and subband 2.
  • the interference coordination information transmitted by the base station is corresponding to merely the physical resource blocks of subband 2.
  • the determination of the interference coordination information may be implemented independently. That is to say, with regard to different bands in the entire system bandwidth, the interference coordination information format is determined respectively and the interference coordination information of each band is determined according to the corresponding format.
  • the type (HII type or OI type) and transmission time of the interference coordination information determined for the physical resource blocks of different bands are independent to each other, i.e., the types of the interference coordination information may be different or same, the transmission time of the interference coordination information may be different or same.
  • the two uplink subframe sets with eIMTA are introduced, it is required to indicate the uplink subframes included in the uplink subframe sets between neighboring base stations.
  • the subframes may have different lengths, as shown in FIG. 6.
  • the subframes on the same time-domain position may also have different lengths, as shown in FIG. 7. Therefore, it is a problem that how to indicate the position of the subframes when they belong to different uplink subframe sets.
  • one possible method for indicating the uplink subframe set may be as follows: indicating whether a subframe denoted by each bit belong to a particular uplink subframe set via a bitmap.
  • the uplink subframe set may vary periodically.
  • the bitmap of one uplink subframe may be utilized to identify whether each subframe belongs to a particular uplink subframe set.
  • the bits may be arranged according to the order of the uplink subframes. Since there are merely two uplink subframe sets, it is possible to indicate whether it belongs to one of uplink subframe sets, thus it is known whether the subframe belongs to the other uplink subframe set.
  • the value of bn may be 0 or 1. If the value of bn is “0”, it indicates that subframe n does not belong to the uplink subframe set. If the value of bn is “1”, it indicates that subframe n belongs to the uplink subframe set.
  • the indication of the uplink subframe set may be implemented as follows: the number of uplink subframes in the uplink subframe set is indicated firstly, and then a start position and length of each uplink subframe in the uplink subframe set are indicated. Thus, each uplink subframe in the uplink subframe set may be indicated accurately.
  • the start position of the uplink subframe and the length of the uplink subframe may be indicated by a unit defined according to a practical requirement.
  • two example indication units are provided.
  • One indication unit is OFDM symbol length, i.e., the length of the OFDM symbol is taken as a unit to evaluate the start position and the length of the uplink subframe, as shown in FIG. 10.
  • uplink subframe set 0 includes 3 uplink subframes, wherein uplink subframe 0 in this set starts from OFDM symbol with index S0, the length of uplink subframe 0 is L0 OFDM symbols; uplink subframe 1 in this set starts from OFDM symbol with index S1, and the length of uplink subframe 1 is L1 OFDM symbols; uplink subframe 2 in this set starts from OFDM symbol with index S2, and the length of uplink subframe 2 is L2 OFDM symbols.
  • N OFDM symbols is regarded as an OFDM symbol unit, and the OFDM symbol unit is taken as a unit to evaluating the start position and length of the uplink subframes, wherein N is an integer larger than 1 and may be configured by higher layer signaling or defined in standards.
  • the length of N OFDM symbols may equal to that of the subframe with minimum length, as shown in FIG. 11.
  • uplink subframe set 1 includes 5 uplink subframes.
  • Each OFDM symbol unit includes 4 OFDM symbols.
  • Uplink subframe 0 in this set starts from OFDM symbol unit of length 4 with index 0, the length of uplink subframe 0 is 2 OFDM symbol units of length 4.
  • Uplink subframe 1 in this set starts from OFDM symbol unit of length 4 with index 3
  • the length of uplink subframe 1 is 2 OFDM symbol units of length 4.
  • Uplink subframe 2 in this set starts from OFDM symbol unit of length 4 with index 5
  • the length of uplink subframe 2 is 2 OFDM symbol units of length 4.
  • Uplink subframe 3 in this set starts from OFDM symbol unit of length 4 with index 7
  • the length of uplink subframe 3 is 2 OFDM symbol units of length 4.
  • Uplink subframe 4 in this set starts from OFDM symbol unit of length 4 with index 10
  • the length of uplink subframe 4 is 2 OFDM symbol units of length 4.
  • a base station needs to transmit or receive ultra-reliable low-latency communication (URLLC) data on some time-frequency resources.
  • the base station transmits URLLC data and control information to the UE, i.e., downlink URLLC data and downlink control information, as shown in FIG. 12, referred to as URLLC downlink subframes.
  • the base station receives URLLC data and control information from the UE, i.e., uplink URLLC data and uplink control information, as shown in FIG. 12, referred to as URLLC uplink subframes.
  • the base station transmits to the UE URLLC data and control information, i.e.
  • the URLLC downlink subframe, URLLC uplink subframe and the URLLC mixed subframe may be semi-statically configured or dynamically indicated to the UE.
  • the base station needs to transmit information to the neighboring cell to notify the neighboring cell that there may be URLLC data transmission on some bands of some subframes of the present cell, and requiring the neighboring cell to take measures to reduce the interference to the URLLC service of the present cell.
  • the URLLC data of the present cell can be reliably transmitted in time.
  • the interference coordination information in this embodiment may be indication information of time-frequency positions where URLLC subframes may be transmitted.
  • the interference coordinating method in this embodiment includes: determining a time-frequency position where a URLLC subframe may be transmitted in the present cell, transmitting indication information of the determined time-frequency position to the neighboring cell, to indicate the neighboring cell to decrease interference to the present cell on the corresponding time-frequency position.
  • interference coordination information transmission methods are provided. Among them, it is mainly described that how to transmit the indication information to the neighboring cell after the time-frequency position where the URLLC subframe may be transmitted is determined.
  • the time-frequency position where a URLLC downlink subframe, a URLLC uplink subframe and/or a URLLC mixed subframe may be transmitted is notified respectively, i.e., it is respectively indicated on which position a URLLC downlink subframe may be transmitted, on which position a URLLC uplink subframe may be transmitted, and on which time-frequency position a URLLC mixed subframe may be transmitted.
  • a bit mapping manner may be adopted to implement the indication.
  • the periodicity is 10ms, each 1ms corresponds to one subframe.
  • Two bits are used for indicating whether a subframe is a URLLC downlink subframe, or a URLLC uplink subframe or a URLLC mixed subframe.
  • the 2 bits are referred to URLLC subframe type indication information.
  • a detailed indication method is as shown in Table 7.
  • the interference coordination information is transmitted by one base station to another base station.
  • the above shows the indication of the time-domain position. It is further required to indicate the frequency-domain position of the URLLC subframe.
  • a subframe which is indicated as a URLLC subframe in the time-domain distribution of the URLLC resources in the frequency-domain is indicated.
  • One type of URLLC subframe occupies discontinuous resources in the frequency-domain.
  • a bitmap manner may be adopted to implement the indication.
  • the indication in the frequency-domain may take one PRB pair or N continuous PRB pairs as a unit, as shown in FIG. 14. For each indication unit in the frequency-domain, it may be a URLLC band or a non-URLLC band.
  • One bit is utilized to indicate whether the frequency-domain indication unit is a URLLC band or a non-URLLC band. This bit is referred to as URLLC frequency-domain indication information.
  • a detailed indication manner is as shown in Table 8.
  • the URLLC band may be indicated with fewer bits.
  • the position of a starting PRB pair of the URLLC band and the number of PRBs of the URLLC band need to be indicated.
  • One detailed method is as follows: a value is utilized to denote the position of the starting PRB pair of the URLLC band the number of PRBs of the URLLC band, this value is referred to as resource indication value (RIV).
  • the starting PRB pair of the URLLC band is denoted by RB START
  • the number of continuous PRBs of the URLLC band is denoted by L CRBs ⁇ 1
  • the entire bandwidth is denoted by N, it may be expressed by:
  • the URLLC mixed subframe there may be two possible structures.
  • One structure includes transmission of downlink control information and downlink data and uplink control information, and there is a guard period between the uplink transmission and the downlink transmission, as shown in FIG. 16.
  • This structure has a relatively long downlink transmission part, and is referred to as a first type URLLC mixed subframe.
  • Another structure includes transmission of downlink control information and uplink data and uplink control information, and there is a guard period between the uplink transmission and the downlink transmission, as shown in FIG. 17.
  • This structure has a relatively long uplink transmission part, and is referred to as a second type URLLC mixed subframe.
  • the time-frequency positions on which a URLLC downlink subframe, a URLLC uplink subframe, a first type URLLC mixed subframe and/or a second type URLLC mixed subframe may be transmitted are respectively notified, i.e., it is respectively indicated on which time-frequency position a URLLC downlink subframe may be transmitted, on which time-frequency position a URLLC uplink subframe may be transmitted, on which time-frequency position a first type URLLC mixed subframe may be transmitted, and on which time-frequency position a second type URLLC mixed subframe may be transmitted.
  • indication is implemented by bit mapping.
  • the periodicity is 10ms, each 1ms corresponds to one subframe.
  • Three bits are utilized to indicate whether a subframe is a URLLC downlink subframe, or a URLLC uplink subframe, or a first type URLLC mixed subframe or a second type URLLC mixed subframe.
  • the three bits are referred to as URLLC subframe type indication information.
  • a detailed indication method is as shown in Table 9.
  • the above shows the indication of the time-domain position. It is further required to indicate the position of the URLLC subframe in the frequency-domain. As to a subframe which is indicated as a URLLC subframe in the time-domain, distribution of the URLLC resources in the frequency-domain is indicated. One type of URLLC subframe occupies discontinuous resources in the frequency-domain. At this time, a bitmap manner may be adopted to implement the indication.
  • the indication in the frequency-domain may take one PRB pair or N continuous PRB pairs as a unit, as shown in FIG. 14. For each indication unit in the frequency-domain, it may be a URLLC band or a non-URLLC band. One bit is utilized to indicate whether the frequency-domain indication unit is a URLLC band or a non-URLLC band. This bit is referred to as URLLC frequency-domain indication information.
  • a detailed indication manner is as shown in Table 10.
  • the URLLC band may be indicated with fewer bits.
  • the position of a starting PRB pair of the URLLC band and the number of PRBs of the URLLC band need to be indicated.
  • One detailed method is as follows: a value is utilized to denote the position of the starting PRB pair of the URLLC band the number of PRBs of the URLLC band, this value is referred to as RIV.
  • the starting PRB pair of the URLLC band is denoted by RB START
  • the number of continuous PRBs of the URLLC band is denoted by L CRBs ⁇ 1
  • the bandwidth of the entire band is denoted by N, it may be expressed by:
  • the time-frequency positions on which a URLLC downlink subframe, a URLLC uplink subframe and a URLLC mixed subframe may be transmitted are not notified respectively, i.e., it is merely indicated that on which time-frequency positions the URLLC downlink subframe, the URLLC uplink subframe and the URLLC mixed subframe may be transmitted, but it is not differentiated which kind of URLLC subframe can be transmitted.
  • the indication is implemented via a bit mapping manner.
  • the periodicity is 10ms, each 1ms corresponds to one subframe.
  • One bit is used for indicating whether a subframe is a URLLC subframe or a non-URLLC subframe. This 1 bit is referred to as URLLC subframe type indication information.
  • a detailed indication method is as shown in Table 11.
  • the above shows the indication of the time-domain position. It is further required to indicate the position of the URLLC subframe in the frequency-domain. As to a subframe which is indicated as a URLLC subframe in the time-domain, distribution of the URLLC resources in the frequency-domain is indicated. One type of URLLC subframe occupies discontinuous resources in the frequency-domain. At this time, a bitmap manner may be adopted to implement the indication.
  • the indication in the frequency-domain may take one PRB pair or N continuous PRB pairs as a unit, as shown in FIG. 14. For each indication unit in the frequency-domain, it may be a URLLC band or a non-URLLC band. One bit is utilized to indicate whether the frequency-domain indication unit is a URLLC band or a non-URLLC band. This bit is referred to as URLLC frequency-domain indication information.
  • a detailed indication manner is as shown in Table 12.
  • the URLLC band may be indicated with fewer bits.
  • the position of a starting PRB pair of the URLLC band and the number of PRBs of the URLLC band need to be indicated.
  • One detailed method is as follows: a value is utilized to denote the position of the starting PRB pair of the URLLC band the number of PRBs of the URLLC band, this value is referred to as resource indication value (RIV).
  • the starting PRB pair of the URLLC band is denoted by RB START
  • the number of continuous PRBs of the URLLC band is denoted by L CRBs ⁇ 1
  • the bandwidth of the entire band is denoted by N, it may be expressed by:
  • the width of the subcarriers transmitting the URLLC service may also change, i.e., different cells may have different subcarrier spacing for transmitting the URLLC service, it is necessary to transmit the PRB width or the subcarrier spacing while transmitting the interference coordination information.
  • the eNB may configure the time-frequency resources as blank resources, i.e., the base station does not transmit any downlink data and reference signal on these time-frequency resources, and does not allow the UE to transmit any uplink data and reference signal on these resources. Thus, it is ensured that no interference is generated to the URLLC transmitted by the neighboring cell. But this manner may lead to time-frequency resource waste.
  • the eNB may configure these resources as uplink subframes. Since the uplink transmission has relatively low interference to the neighboring cell compared to downlink transmission, it is possible to reduce the interference to the URLLC transmission of the neighboring cell.
  • the eNB decreases a signal transmit power on these resources. In particular, it is possible to configure low power transmission on these resources, which is able to reduce the interference to the URLLC transmission of the neighboring cell.
  • the eNB informs the UE via higher layer signaling the time-frequency resources on which the neighboring cell will transmit URLLC, i.e., the time-frequency resources adopting the low power transmission, i.e., which band resources in which subframes adopt the low power transmission.
  • the UE may decrease signal transmit power and adopts low power transmission.
  • a detailed method may include: on the time-frequency resources that the neighboring cell will have URLLC transmission, adopting a set of independent power control parameter to perform power control.
  • the detailed power control parameter may be configured via higher layer signaling, so as to ensure the decrease of the signal transmit power.
  • the time-frequency resources on which the neighboring cell will have URLLC transmission i.e. the time-frequency resources on which the independent power control parameter is applied for power control, need to be informed to the UE by the base station via higher layer signaling.
  • the base station may decrease the transmit power and adopt a low power transmission.
  • a detailed method includes: firstly decreasing the transmit power of the channel state information-reference signal (CSI-RS) transmitted on the time-frequency resources on which the neighboring cell will transmit URLLC, and adopting a low power transmission.
  • CSI-RS channel state information-reference signal
  • the CSI measurement is performed according to the CSI-RS transmitted with low power.
  • the UE feeds back the measured CSI to the eNB.
  • the eNB transmits data on the time-frequency resources with low power, so as to decrease the transmit power.
  • a ratio Pc between the power of the CSI-RS and that of the PDSCH is configured independently, so as to decrease the signal transmit power.
  • a different beam forming is adopted for the time-frequency resources on which the neighboring cell will transmit URLLC, so as to reduce the interference to the neighboring cell on the time-frequency resources used for URLLC transmission, as shown in FIG. 18.
  • This method is able to reduce the interference to the URLLC transmission of the neighboring cell. Meanwhile, this method is able to avoid waste of resources, since not all of the resources of the neighboring cell are used for the URLLC transmission.
  • the present cell adopts beam forming with a large down-tilt angle (e.g., the down-tilt angle is larger than a predefined threshold), i.e., providing services for cell-center users, so as to have a low interference to the URLLC data of the neighboring cell.
  • a large down-tilt angle e.g., the down-tilt angle is larger than a predefined threshold
  • the present cell adopts a beam forming with a small down-tilt angle (e.g. the down-tilt angle is equal to or smaller than a predefined threshold), i.e., providing services to cell-edge users, as shown in FIG. 19.
  • a detailed implementation may be as follows: for a CSI report with precoding matrix indicator (PMI) feedback, the base station restricts the codebook of the PMI reported by the UE via common signaling or UE specific control signaling, so as to reduce the interference to the URLLC data transmitted by the neighboring cell.
  • the base station configures different PMI codebook constraints for different time-frequency resources, i.e., the base station firstly configures different time-frequency resource sets, and then configures different PMI codebook constraints for different time-frequency resource sets. For example, the UE configures two time-frequency resource sets, respectively first time-frequency resources and second time-frequency resources.
  • the PMI codebook constraint of the CSI reported for the first time-frequency resources is a first codebook constraint
  • the PMI codebook constraint of the CSI reported for the second time-frequency resources is a second codebook constraint.
  • the first codebook constraint and the second codebook constraint are configured independently.
  • the first time-frequency resources may be the time-frequency resources on which the neighboring cell transmits URLLC data
  • the second time-frequency resources may be time-frequency resources on which the neighboring cell transmits non-URLLC data.
  • the base station may configure different CSI-RS processes for different time-frequency resources, i.e., the base station firstly configures different time-frequency resource sets, and then configures different CSI-RS processes for the different time-frequency resource sets, wherein for different CSI-RS processes, the CSI-RS resources may be different.
  • the UE is configured with two time-frequency resource sets, respectively first time-frequency resources and second time-frequency resources.
  • the CSI-RS process utilized by the CSI measurement reported for the first time-frequency resources is a first CSI-RS process
  • the CSI-RS process utilized by the CSI measurement reported for the second time-frequency resources is a second CSI-RS process.
  • the first CSI-RS process and the second CSI-RS process are independently configured.
  • the PMI utilized by them may be different, and the number of differently precoded CSI-RS resources utilized in different CSI-RS processes may also be different.
  • the first time-frequency resources may be the time-frequency resources on which the neighboring cell transmits URLLC data
  • the second time-frequency resources may be the time-frequency resources on which the neighboring cell transmits non-URLLC data.
  • the CSI-RS process includes N 1 precoded CSI-RS resources, respectively ⁇ CSI-RS resource 0, CSI-RS resource 1, ..., CSI-RS resource N 1 -2, CSI-RS resource N 1 -1 ⁇ , as shown in FIG. 20.
  • Each of these CSI-RS resources adopts a PMI with a large down-tilt angle (e.g. the down-tilt angle is larger than a predefined threshold).
  • the second CSI-RS process includes N 2 precoded CSI-RS resources, respectively ⁇ CSI-RS resource 0, CSI-RS resource 1, ..., CSI-RS resource N 2 -2, CSI-RS resource N 2 -1 ⁇ , as shown in FIG. 21.
  • Each of these CSI-RS resources adopts a PMI with a small down-tilt angle (e.g., the down-tile is smaller than a predefined threshold).
  • the base station may configure the same CSI-RS process for different time-frequency resources, but configures different resource constraints for different time-frequency resources.
  • Adopting different resource constraints for different CSI-RS resources means that constraints are set to the measured CSI-RS resources, since different CSI-RS resources adopt different beam forming.
  • the base station firstly configures different time-frequency resource sets, and configures one CSI-RS process for the time-frequency resource sets. Then, with respect to different time-frequency resource sets, different CSI-RS constraints are adopted.
  • the UE is configured with two time-frequency resource sets, respectively first time-frequency resources and second time-frequency resources.
  • One set of CSI-RS resources is configured, including N precoded CSI-RS resources, respectively ⁇ CSI-RS resource 0, CSI-RS resource 1, ..., CSI-RS resource N-2, CSI-RS resource N-1 ⁇ .
  • the resource constraint for the first time-frequency resources and the CSI-RS constraint for the second time-frequency resources are configured independently and the number of precoded CSI-RS resources utilized by them may also be different.
  • the first time-frequency resources may be the time-frequency resources on which the neighboring cell transmits URLLC data
  • the second time-frequency resources may be the time-frequency resources on which the neighboring cell transmits non-URLLC data.
  • the CSI-RS resource for the first time-frequency resources includes N 1 precoded CSI-RS resources (for different CSI-RS resources, the adopted PMI down-tilt angles are different), respectively are ⁇ CSI-RS resource 0, CSI-RS resource 1, ..., CSI-RS resource N 1 -2, CSI-RS resource N 1 -1 ⁇ , as shown in FIG. 22.
  • the resource constraint is: the PMI down-tilt angles of the CSI-RS resources of the first time-frequency resources are all relatively large.
  • the CSI-RS resources for the second time-frequency resources include N 2 precoded CSI-RS resources, respectively ⁇ CSI-RS resource 0, CSI-RS resource 1, ..., CSI-RS resource N 2 -2, CSI-RS resource N 2 -1 ⁇ , and N 2 may be equal to N.
  • the resource constraint is: the CSI-RS resources for the second time-frequency resource include some or all CSI-RS resources of the configured CSI-RS process, as shown in FIG. 22.
  • the number of CSI-RS resources of the first time-frequency resources may be less than that of the second time-frequency resources, i.e., the CSI-RS resources of the first time-frequency resources include CSI-RS resources with large down-tilt angles (e.g. the down-tilt angles are larger than a predefined threshold), so as to decrease the interference to the URLLC service of the neighboring cell, whereas the CSI-RS resources of the second time-frequency resources include CSI-RS resources of all down-tilt angles, such that the base station is able to cover the whole cell.
  • FIG. 23 is a schematic diagram illustrating a basic structure of the apparatus. As shown in FIG. 23, the apparatus includes a format determining unit and a transmitting unit.
  • the format determining unit is configured to determine an interference coordination information format according to uplink resource allocation of a UE.
  • the transmission unit is configured to determine interference coordination information according to the determined interference coordination information format, and transmit the interference coordination information between neighboring base stations.
  • the above interference coordinating apparatus and the corresponding method when the allocation manners of the uplink resources are different (including the situation that the frequency-domain basic units are different, and the time-domain basic units of uplink scheduling are also different), it is able to perform interference coordination better between cells and reuse resources better between cells.
  • FIG. 24 is a schematic diagram illustrating a basic structure of the apparatus. As shown in FIG. 24, the apparatus includes a position determining unit and a transmitting unit.
  • the position determining unit is configured to determine a time-frequency position on which a URLLC subframe may be transmitted in a present cell.
  • the transmitting unit is configured to transmit indication information of the determined time-frequency position to a neighboring cell to indicate the neighboring cell to decrease interference to the present cell on the corresponding time-frequency position.
  • FIG. 25 is a schematic diagram illustrating a basic structure of the apparatus. As shown in FIG. 25, the apparatus includes: a receiving unit and an interference controlling unit.
  • the receiving unit is configured to receive indication information of time-frequency position on which a neighboring cell may transmit a URLLC subframe.
  • the interference controlling unit is configured to decrease interference to the neighboring cell on the time-frequency position indicated by the received indication information.
  • the above interference coordination apparatus and the corresponding method it is possible to control the interference of the neighboring cell for important service of the serving cell.

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Abstract

La présente invention concerne un système de communication 5G ou de pré-5ème génération conçu pour prendre en charge des débits de données supérieurs dépassant un système de communication (4G) de 4ème génération telle qu'une technologie d'évolution à long terme (LTE). La présente invention porte sur un procédé permettant de faire fonctionner une station de base dans un système de communication sans fil, consistant : à déterminer un format d'informations de coordination de brouillages selon une attribution de ressources de liaison montante d'un terminal ; et à déterminer des informations de coordination des brouillages selon le format d'informations de coordination de brouillages déterminé, et à transmettre les informations de coordination des brouillages entre des stations de base voisines. Selon la présente invention, il est possible d'améliorer la mise en œuvre d'une coordination des brouillages entre cellules.
PCT/KR2017/005398 2016-05-24 2017-05-24 Procédé et appareil de coordination des brouillages entre cellules WO2017204551A1 (fr)

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