WO2018137444A1 - Procédé et dispositif d'élimination d'interférences, et support d'informations - Google Patents

Procédé et dispositif d'élimination d'interférences, et support d'informations Download PDF

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Publication number
WO2018137444A1
WO2018137444A1 PCT/CN2017/117124 CN2017117124W WO2018137444A1 WO 2018137444 A1 WO2018137444 A1 WO 2018137444A1 CN 2017117124 W CN2017117124 W CN 2017117124W WO 2018137444 A1 WO2018137444 A1 WO 2018137444A1
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cell
interference
neighboring cell
downlink
uplink
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PCT/CN2017/117124
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English (en)
Chinese (zh)
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徐汉青
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中兴通讯股份有限公司
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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
    • H04J11/0063—Interference mitigation or co-ordination of multipath interference, e.g. Rake receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and in particular, to a method and apparatus for eliminating interference and a storage medium.
  • the LTE system supports performing FDD (Frequency Division Duplexing) operations on a pair of spectrums, and also supports performing TDD (Time Division Duplexing) operations on an unpaired carrier.
  • FDD Frequency Division Duplexing
  • TDD Time Division Duplexing
  • eIMTA enhanced interference mitigation and traffic adapatation
  • Dynamic TDD also known as Flexible Duplexing or Duplexing Flexibility, refers to uplink or downlink carriers that can be on unpaired spectrum or in paired spectrum.
  • the uplink or downlink transmission direction is dynamically or semi-dynamically changed.
  • dynamic TDD operations can support sub-frame levels, or slot levels, and even more dynamic transmit direction changes.
  • the dynamic TDD does not limit the configuration mode in which only a limited number of uplink and downlink subframe allocations are used, and the uplink and downlink transmissions can be scheduled more flexibly.
  • the uplink transmission of the user terminal (UE2-1) in the second cell causes cross-link interference to the downlink reception of the user terminal (UE1-1) in the first cell (UE-to- UE (terminal-to-terminal interference); on the other hand, as shown in FIG. 1-b, the downlink transmission of the base station (gNB2) of the second cell causes cross-linking to the uplink reception of the base station (gNB1) of the first cell. Interference (gNB-to-gNB (base station to base station) interference).
  • the network side node may include a TRP (Transmission/Reception Point), an AP (Access Point, an access point), and the like in addition to the GNB (The Next Generation Node B).
  • the dynamic cross-link interference is different from the previous same-link interference. It has the characteristics of serious interference, large influence, fast change of direction, and no mature mechanism to solve. How to solve the cross-link interference problem, there is no good solution.
  • the technical problem to be solved by the present disclosure is to provide a method and apparatus for eliminating interference, which can solve the problem of cross-link interference.
  • Embodiments of the present disclosure provide a method for eliminating interference, including:
  • Determining a primary sub-band and a secondary sub-band of a cell setting a primary sub-band and a secondary sub-band of one cell to different sub-bands, and setting a primary sub-band of one cell and a primary sub-band of a neighboring cell of the cell to different sub-bands;
  • the primary sub-band and/or the secondary sub-band of the cell are used for transmission in the downlink direction of the cell, and the primary sub-band of the cell is used for transmission in the uplink direction of the cell.
  • the embodiment of the present disclosure further provides an apparatus for eliminating interference, including:
  • a subband setting module configured to determine a primary subband and a secondary subband of a cell: setting a primary subband and a secondary subband of one cell to different subbands, and a primary subband of one cell and a primary subband of a neighboring cell of the cell Set to a different subband;
  • the transmission control module is configured to transmit using the primary subband and/or the secondary subband of the cell in the downlink direction of the cell, and transmit the primary subband of the cell in the uplink direction of the cell.
  • Embodiments of the present disclosure also provide a method for eliminating interference, including:
  • the base station acquires a measurement quantity for measuring a cross-link interference level
  • the base station interacts with the neighboring cell base station to measure the measured amount of cross-link interference level.
  • the embodiment of the present disclosure further provides an apparatus for eliminating interference, which is applied to a base station, and includes:
  • a measurement quantity acquisition module configured to acquire a measurement quantity for measuring a cross-link interference level
  • the measurement quantity interaction module is configured to interact with the neighboring cell base station to measure the measurement amount of the cross-link interference level.
  • Embodiments of the present disclosure also provide a storage medium having stored thereon a computer program, wherein the program is executed by the processor to implement the following steps:
  • Determining a primary sub-band and a secondary sub-band of a cell setting a primary sub-band and a secondary sub-band of one cell to different sub-bands, and setting a primary sub-band of one cell and a primary sub-band of a neighboring cell of the cell to different sub-bands;
  • the primary sub-band and/or the secondary sub-band of the cell are used for transmission in the downlink direction of the cell, and the primary sub-band of the cell is used for transmission in the uplink direction of the cell.
  • Embodiments of the present disclosure also provide a storage medium having stored thereon a computer program, wherein the program is executed by the processor to implement the following steps:
  • the base station acquires a measurement quantity for measuring a cross-link interference level
  • the base station interacts with the neighboring cell base station to measure the measured amount of cross-link interference level.
  • a method and an apparatus for eliminating interference determine a primary sub-band and a secondary sub-band of a cell: setting a primary sub-band and a secondary sub-band of one cell into different sub-bands, and one The primary subband of the cell and the primary subband of the neighboring cell of the cell are set to different subbands; the primary subband and/or the secondary of the cell are used in the downlink direction of the cell.
  • the band transmits, and the primary sub-band of the cell is used for transmission in the uplink direction of the cell.
  • Embodiments of the present disclosure are capable of solving cross-link interference problems.
  • FIG. 1-a is a schematic diagram of cross-link interference in the related art (end-to-end interference);
  • FIG. 1-b is a schematic diagram of cross-link interference in a related art (base station to base station interference);
  • FIG. 2 is a flowchart of a method for eliminating interference according to Embodiment 1 of the present disclosure
  • Example 3 is a schematic diagram of subband division and power setting of three neighboring cells in Example 1 of the present disclosure
  • 4-1 is a schematic diagram of eliminating cross-link interference (base station to base station) in Example 1 of the present disclosure
  • 4-2 is a schematic diagram of eliminating cross-link interference (terminal-to-terminal) in Example 1 of the present disclosure
  • FIG. 5 is a schematic diagram of an apparatus for eliminating interference according to Embodiment 2 of the present disclosure.
  • FIG. 6 is a flowchart of a method for eliminating interference according to Embodiment 3 of the present disclosure.
  • FIG. 7 is a schematic diagram of an apparatus for eliminating interference according to Embodiment 4 of the present disclosure.
  • the network side uses a base station (gNB) as an example, and the method applied to the base station can also be applied to a cell, a small cell, a transmission and reception point (TRP), and an access point.
  • Network-side deployment equipment such as (AP).
  • the terminal side uses UE (User Equipment) as an example.
  • the method applied to the UE can also be applied to an Internet of Things (IoT) device, an MTC (Machine Type Communication) device, and a V2X (Vehicle to Vehicle, car to car) equipment.
  • IoT Internet of Things
  • MTC Machine Type Communication
  • V2X Vehicle to Vehicle, car to car
  • the uplink/downlink interference of a cell to the downlink of the neighboring cell is equivalent to the downlink interference received by the cell to the neighboring cell UE, that is, the interfered party is the UE of the neighboring cell;
  • the interference to the uplink of the neighboring cell is equivalent to the uplink interference received by the cell to the neighboring cell, that is, the interferer is the base station of the neighboring cell.
  • an embodiment of the present disclosure provides a method for eliminating interference, including:
  • Step S210 Determine a primary sub-band and a secondary sub-band of a cell: set a primary sub-band and a secondary sub-band of one cell to different sub-bands, and set a primary sub-band of one cell and a primary sub-band of a neighboring cell of the cell to be different. Subband;
  • Step S220 The primary sub-band and/or the secondary sub-band of the cell are used for transmission in the downlink direction of the cell, and the primary sub-band of the cell is used for transmission in the uplink direction of the cell.
  • the determining the primary sub-band and the secondary sub-band of the cell includes:
  • each RB in one subband is continuous or discontinuous; different subbands contain the same or different numbers of RBs;
  • the primary sub-band of a cell is a sub-band
  • the sub-band of the cell is a sub-band of the cell bandwidth or carrier bandwidth except the primary sub-band; for example, a sub-band division of a cell
  • main sub-band 1, sub-sub-band 1, sub-sub-band 2, ... sub-band n For: main sub-band 1, sub-sub-band 1, sub-sub-band 2, ... sub-band n;
  • determining the number and range of subbands may be determined by using any one of the following methods: determined by a protocol; uniformly determined by a base station or a macro cell; and determined by mutual coordination between adjacent cells;
  • determining the primary subband and the secondary subband of the cell may be determined by using any one of the following methods:
  • determining the number and range of sub-bands, and the primary sub-band and the auxiliary sub-band of the cell including determining by using any one of the following a-c:
  • the operator/protocol/base station divides the system bandwidth into three sub-bands in advance, but for a particular cell, which of the three sub-bands is the primary sub-band is not limited.
  • the primary subband may be subsequently determined by mutual coordination between neighboring cells;
  • the operator/protocol/base station divides the system bandwidth into three sub-bands in advance: sub-band 1, sub-band 2, and sub-band 3.
  • Cell 1 uses subband 1 as the primary subband
  • cell 2 uses subband 2 as the primary subband
  • cell 3 uses subband 3 as the primary subband;
  • the sending by using the primary sub-band and/or the secondary sub-band of the cell in the downlink direction of the cell, includes:
  • the downlink communication between the base station and the cell edge UE is sent by using a primary sub-band, and the transmission power is greater than or equal to a high power threshold;
  • the downlink communication of the base station to the cell center UE is transmitted by using the primary subband and/or the secondary subband; when the downlink communication of the base station to the cell center UE is transmitted on the secondary subband, the transmission power is less than or equal to the low power threshold.
  • the sub-band and power conditions used by the uplink or downlink of the cell are specifically described below:
  • the downlink communication between the base station and the cell center UE may be transmitted by using the primary subband and/or the secondary subband, and the downlink communication of the base station to the cell edge UE is preferentially transmitted by using the primary subband; and the uplink communication of the UE (including the cell center UE and the cell edge UE) in the cell Priority is given to the primary subband to send.
  • the protection bandwidth can be set between sub-bands as needed to prevent adjacent channel interference.
  • the DL and UL of the same cell are not simultaneously transmitted, and the protection bandwidth may not be set.
  • There is a demand setting protection bandwidth between different cells but because there is a path loss between cells, the protection bandwidth does not need to be too large.
  • Downlink communication from the base station to the cell edge UE is preferentially transmitted using the primary subband. At this time, when the downlink communication from the base station to the cell edge UE is transmitted on the primary subband, it is required to transmit with high power or set a high power threshold or a high power range.
  • the high-power transmission from the base station to the cell edge UE causes the downlink transmission of the base station to interfere with the uplink reception of the neighboring base station (provided that the downlink transmission and the uplink transmission use the same frequency band).
  • the downlink transmit power needs to cover the edge UE and can guarantee the performance of the edge UE.
  • the priority to use the primary subband to send contains several meanings:
  • the downlink communication from the base station to the cell edge UE can only be sent by using the primary subband;
  • the downlink communication from the base station to the cell edge UE is preferentially transmitted using the primary subband.
  • the load is light, or the number of edge UEs is small, it is preferred to send on the primary sub-band; when the load is too heavy, or the number of edge UEs is large, and the DL communication demand is large, it is preferably sent on the primary sub-band, and then use other helpers. Bring with; or
  • the downlink communication from the base station to the cell edge UE can use either the primary subband or the secondary subband.
  • downlink transmission is performed only on the primary sub-band.
  • the downlink communication from the base station to the cell center UE can be transmitted using the primary subband and/or the secondary subband.
  • the downlink communication of the base station to the cell center UE is transmitted on the secondary sub-band, it is required to transmit with low power or set a low power threshold or a low power range; when the downlink communication of the base station to the cell center UE is transmitted on the primary sub-band
  • the power is not limited to high power or low power. Preferably, it is required to transmit at low power, or to set a low power threshold or a low power range.
  • the "low power/low power threshold/low power range” is a “high power/high power threshold/high power range” for downlink communication from a base station to a cell edge UE.
  • the downlink power of the cell edge UE is set to power A
  • the downlink power of the cell center UE is set to B.
  • the primary sub-band and/or the secondary sub-band transmission described herein does not mean that each UE's DL scheduling needs to cover two sub-bands, or only one sub-band. Rather, the primary subband and the secondary subband (that is, the full bandwidth) can be used for the cell center UE to transmit. Specifically, which subbands and even which RBs may depend on the channel condition, block size, or scheduling of the UE. happening.
  • the uplink communication of the UE in the cell is preferentially transmitted using the primary sub-band.
  • the intra-cell UE transmits the uplink on the primary sub-band, there is no restriction on the uplink transmission power of the UE. That is, the uplink power of the UE still depends on the uplink power control algorithm of the UE (eg, scheduling block size, path loss, open loop, etc.), but may not be affected by the subband attributes (primary subband, subband).
  • the uplink communication of the UE in the cell preferentially uses the primary subband transmission to include several meanings:
  • the uplink communication of the UE in the cell can only be sent by using the primary sub-band;
  • the uplink communication of the UE in the cell is preferentially transmitted using the primary sub-band.
  • the load is light, the number of UEs in the cell is small, and it is preferred to transmit on the primary sub-band; when the load is too heavy, or the number of UEs in the cell is large, and the UL communication demand is large, it is preferably sent on the primary sub-band, and then use other auxiliary Subband transmission; or
  • the uplink communication of the UE in the cell can use either the primary subband or the secondary subband.
  • downlink transmission is performed only on the primary sub-band.
  • the primary sub-band and/or the secondary sub-band of the cell are used for transmission in the downlink direction of the cell, and the primary sub-band of the cell is used for transmission in the uplink direction of the cell, including:
  • the interference situation of the cross-link interference between the target cell and the neighboring cell is determined, and the interference situation is exchanged between the target cell and the neighboring cell, and coordination processing for reducing interference is performed, including:
  • the interference level indication of the downlink interference of the neighboring cell received in the uplink direction of the target cell (such as CLI-UL-OI (CLI-Uplink-overload indicator)) is high interference or exceeds the pre- When the first threshold is set, at least one of the following processes is performed:
  • the target cell increases uplink transmit power
  • the neighboring cell of the target cell reduces downlink transmission power
  • the target cell uplink uses a primary subband for transmission
  • the neighboring cell of the target cell downlink uses the primary sub-band for transmission
  • the edge area of the neighboring cell of the target cell is downlinked by using a primary subband
  • the CLI-UL-OI is used to characterize the cross-link interference level received by a cell in the uplink, and the interfered cell (base station) measures the interference of the downlink of the neighboring cell to the uplink of the cell, which belongs to post-interference coordination.
  • the CLI-UL-OI characterizes the amount of interference of the interference level of the neighboring cell downlink channel experienced by each RB or each subband of the upstream bandwidth.
  • CLI-UL-OI can be divided into three levels: high interference, medium interference, and low interference; or two levels of high interference and low interference.
  • the CLI-UL-OI is measured by the interfered cell (base station) and notified to the neighboring cell, and the neighboring cell is expected to be coordinated.
  • the notification mode may be through a backhaul link (such as an X2 interface or a private interface) or an air interface (such as OTA signaling (Over the Air signaling)).
  • a backhaul link such as an X2 interface or a private interface
  • an air interface such as OTA signaling (Over the Air signaling)
  • the concept of subbands may be the same or different from the concept of the primary subband or the secondary subband described above. For example, another division manner is adopted, for example, several RBs are set as one sub-band, which is independent of the concept of the main sub-band or the sub-sub-band.
  • the uplink and downlink transmissions of the target cell and its neighboring cells in the initial stage are all transmitted using full bandwidth.
  • the target cell obtains the cross-link interference of the uplink in the neighboring cell through the measurement of the CLI-UL-OI. If the CLI-UL-OI is high or exceeds the preset threshold, the target cell uses the primary sub-band of the target cell for uplink (UL) transmission, and feeds back the result of the CLI-UL-OI or sub-band usage to the neighbor.
  • the neighboring area uses the primary sub-band of the neighboring area to perform downlink (DL) transmission to the edge UE. This reduces the cross-link interference of the downlink of the neighboring cell to the uplink of the target cell.
  • the interference situation of the cross-link interference between the target cell and the neighboring cell is determined, and the interference situation is exchanged between the target cell and the neighboring cell, and coordination processing for reducing interference is performed, including:
  • the interference level indication of the interference in the downlink direction of the neighboring cell in the uplink direction of the target cell (such as CLI-UL-HII (CLI-Uplink-high-interference indicator)) is high interference
  • CLI-UL-HII CLI-Uplink-high-interference indicator
  • the target cell reduces uplink transmit power
  • the neighboring cell of the target cell increases downlink transmit power
  • the target cell uplink uses a primary subband for transmission
  • the neighboring cell of the target cell downlink uses the primary sub-band for transmission
  • the edge area of the neighboring cell of the target cell is downlinked by using a primary subband
  • the CLI-UL-HII is used to characterize the possible interference level of a cell uplink to the neighboring cell downlink, and the interference-causing cell measures the interference of the UL-to-DL (the uplink of the current cell to the downlink of the neighboring cell), which belongs to the pre-interference pre-interference. coordination.
  • the CLI-UL-HII characterizes the possible interference level of the UE to the neighboring cell downlink for the entire bandwidth of the cell to be scheduled.
  • CLI-UL-HII can be divided into three levels: high interference, medium interference, and low interference; or divided into two levels: high interference and low interference.
  • the CLI-UL-HII is measured by the cell (base station) causing the interference and notified to the neighboring cell, and the neighboring cell is expected to be coordinated.
  • the notification mode may be through a backhaul link (such as an X2 interface or a private interface) or an air interface (such as OTA signaling (Over the Air signaling)).
  • Each RB or each subband corresponds to a value.
  • the concept of subbands may be the same or different from the concept of the primary subband or the secondary subband described above. For example, another division manner is adopted, for example, several RBs are set as one sub-band, which is independent of the concept of the main sub-band or the sub-sub-band.
  • the uplink and downlink transmissions of the target cell and its neighboring cells in the initial stage are all transmitted using full bandwidth.
  • the target cell obtains the downlink cross-link interference situation that the uplink may have in the neighboring cell through the measurement of the CLI-UL-HII. If the CLI-UL-HII is high-interference or exceeds the preset threshold, the target cell uses the primary sub-band of the target cell for uplink (UL) transmission, and feeds back the CLI-UL-HII result or sub-band usage to the neighbor.
  • the neighboring area uses the primary sub-band of the neighboring area to perform downlink (DL) transmission to the edge UE. This reduces the cross-link interference of the uplink of the target cell to the downlink of the neighboring cell.
  • the interference situation of the cross-link interference between the target cell and the neighboring cell is determined, and the interference situation is exchanged between the target cell and the neighboring cell, and coordination processing for reducing interference is performed, including:
  • the interference level indication of the uplink interference of the neighboring cell received in the downlink direction of the target cell (such as CLI-DL-OI (CLI-Downlink-overload indicator)) is high interference or exceeds pre-
  • CLI-DL-OI CLI-Downlink-overload indicator
  • the target cell increases downlink transmit power
  • the neighboring cell of the target cell reduces uplink transmit power
  • the target cell downlink uses a primary sub-band for transmission
  • the edge area of the target cell is downlinked using a primary sub-band for transmission
  • the neighboring cell of the target cell uplink uses the primary sub-band for transmission
  • the CLI-DL-OI is used to characterize the cross-link interference level received by a cell in the downlink, and the interfered cell measures the interference of the UL-to-DL (the neighboring cell uplink to the downlink of the local cell), which belongs to post-interference coordination.
  • the CLI-DL-OI characterizes the measurement of the interference level of the uplink channel of the neighboring cell experienced by each RB or each subband of the downlink bandwidth.
  • CLI-DL-OI can be divided into three levels: high interference, medium interference, and low interference; or two levels of high interference and low interference.
  • the CLI-DL-OI is measured by the interfered cell (base station or UE, preferably UE), and if the UE performs measurement, the UE needs to feed back the measurement amount to the base station.
  • the neighboring cell may be notified by the base station, and the neighboring cell is expected to give coordination.
  • the notification mode may be through a backhaul link (such as an X2 interface or a private interface) or an air interface (such as OTA signaling (Over the Air signaling)).
  • the concept of subbands may be the same or different from the concept of the primary subband or the secondary subband described above. For example, another division manner is adopted, for example, several RBs are set as one sub-band, which is independent of the concept of the main sub-band or the sub-sub-band.
  • the interference situation of the cross-link interference between the target cell and the neighboring cell is determined, and the interference situation is exchanged between the target cell and the neighboring cell, and coordination processing for reducing interference is performed, including:
  • the interference level indication of the interference in the uplink direction of the neighboring cell in the downlink direction of the target cell (such as CLI-DL-HII (CLI-Downlink-high-interference indicator)) is high interference.
  • CLI-DL-HII CLI-Downlink-high-interference indicator
  • the target cell reduces downlink transmit power
  • the neighboring cell of the target cell increases uplink transmit power
  • the target cell downlink uses a primary sub-band for transmission
  • the edge area of the target cell is downlinked using a primary sub-band for transmission;
  • the neighboring cell of the target cell uplink uses the primary sub-band for transmission
  • the CLI-DL-HII is used to characterize the possible interference level of a cell downlink to the neighboring cell uplink, and the interference-causing cell measures the interference of the DL-to-UL (the downlink of the current cell to the neighboring cell uplink), which belongs to the pre-interference pre-interference. coordination.
  • the CLI-DL-HII characterizes the possible interference level of the UE to the neighboring cell uplink for the entire downlink bandwidth of the cell to be scheduled.
  • CLI-DL-HII can be divided into three levels: high interference, medium interference, and low interference; or two levels of high interference and low interference.
  • the CLI-DL-HII is measured by the cell (base station) causing the interference, and is notified to the neighboring cell, and the neighboring cell is expected to be coordinated.
  • the notification mode may be through a backhaul link (such as an X2 interface or a private interface) or an air interface (such as OTA signaling (Over the Air signaling)).
  • Each RB or each subband corresponds to a value.
  • the concept of subbands may be the same or different from the concept of the primary subband or the secondary subband described above. For example, another division manner is adopted, for example, several RBs are set as one sub-band, which is independent of the concept of the main sub-band or the sub-sub-band.
  • the interference level indication for characterizing the uplink direction of the target cell to the uplink direction of the neighboring cell may also use CLI-DL-RNTP (CLI-DL-Relative Narrowband TX Power, cross-link interference-downlink-relative narrowband transmission) Power) indicator.
  • CLI-DL-RNTP characterizes the power level of each RB of the full bandwidth to be downlink scheduled;
  • the interference level indication for characterizing the uplink direction of the target cell to the downlink direction of the neighboring cell may also use CLI-UL-RNTP (CLI-UL-Relative Narrowband TX Power, cross-link interference-uplink-relative narrowband transmit power) index.
  • CLI-UL-RNTP characterizes the power level of each RB of the full bandwidth to be uplink scheduled;
  • a CLI-RSRP CLI-Reference Signal Receiving Power
  • the CLI-RSRP is used to determine two UEs.
  • Interference or path loss or used to determine interference or path loss between two base stations. Similar to the RSRP used in LTE (used to determine the large-scale channel condition or path loss between the base station and the UE), the same noun or term can be used, but the CLI-RSRP here can be subdivided into CLI-RSRP-gNB and CLI-RSRP-UE, the former is mainly used for RSRP measurement between the base station and the base station, and the latter is used for RSRP measurement between the UE and the UE.
  • the determining the interference situation of the cross-link interference between the target cell and the neighboring cell includes: acquiring, by the base station of the target cell and/or the neighboring cell, a measurement quantity for characterizing the cross-link interference level, where The measured quantity includes at least one of the following measured quantities:
  • the measurement quantity used to characterize the downlink interference of the neighboring cell received by the uplink of the cell cross-link interference-uplink-overload indication CLI-UL-OI;
  • the measurement quantity used to characterize the uplink interference of the neighboring cell received by the downlink of the cell cross-link interference-downlink-overload indication CLI-DL-OI;
  • the measurement quantity used to characterize the interference that the downlink of the cell may cause to the uplink of the neighboring cell: cross-link interference-downlink-high interference indication CLI-DL-HII;
  • a measurement quantity used to characterize a reference signal received power level between a cell base station and a neighboring cell base station cross-link interference-reference signal received power-base station CLI-RSRP-gNB;
  • Means for characterizing a reference signal received power level between the cell user equipment UE and the neighboring cell UE cross-link interference-reference signal received power-user equipment CLI-RSRP-UE;
  • the interference between the target cell and the neighboring cell includes:
  • the measurement amount is exchanged between the base stations of the target cell and/or the neighboring cell by: backhaul link and/or air interface signaling;
  • the backhaul link includes: an X2 interface or a private interface.
  • the measurement quantity measured by the user equipment UE and fed back to the base station includes at least one of the following:
  • the measurement quantity used to characterize the uplink interference of the neighboring cell received by the downlink of the cell cross-link interference-downlink-overload indication CLI-DL-OI;
  • Means for characterizing a reference signal received power level between the cell user equipment UE and the neighboring cell UE cross-link interference-reference signal received power-user equipment CLI-RSRP-UE;
  • 100 RBs may be included.
  • 100 RBs can be divided into two sub-bands.
  • subband 1 and subband 2 each contain 50 RBs, and the two subbands are equal in size.
  • the primary subband of cell 1 is subband 1, and the subband is subband 2.
  • the primary sub-band of cell 2 is sub-band 2, and the sub-band is sub-band 1.
  • Subband 1, subband 2, and subband 3 contain 33, 33, and 34 RBs, respectively. These three sub-bands vary in size.
  • the primary sub-band of cell 1 is sub-band 1, and the sub-band is sub-band 2 and sub-band 3.
  • the primary sub-band of cell 2 is sub-band 2, and the sub-band is sub-band 1 and sub-band 3.
  • the primary sub-band of cell 3 is sub-band 2, and the sub-band is sub-band 1 and sub-band 3.
  • the transmit power of the three cells on different sub-bands has the following characteristics: high power is transmitted on the primary sub-band, and low power is transmitted on the secondary sub-band.
  • the DL of the cell 1 edge UE uses subband 1 (high power threshold, which is the primary subband of cell 1); the DL of the cell 1 center UE uses all subbands 1/2/3 (low power threshold); Both the edge UE and the UL of the central UE use subband 1 (power setting is not required, depending on the uplink power control).
  • the DL of the neighboring edge UE uses a subband different from subband 1, for example, subband 2 (high power threshold, which is the primary subband of cell 2); the neighboring cell center UE can use all subbands (subband 1/2/) 3), but the power threshold is low.
  • the edge UE of the neighboring cell and the UL of the central UE respectively use the subband 2 (the power setting is not required, and is determined according to the uplink power control).
  • gNB1 of cell 1 sends a DL to the cell center UE, and transmits it at a low power of 1/2/3 in the subband.
  • the coverage is in the dotted line and cannot reach the gNB2 of the cell 2. Therefore, the CLI of the gNB2 cannot be caused by the CLI, or the CLI can be ignored. Therefore, the cross-link interference of the base station to the base station is eliminated.
  • the gNB1 sends the DL to the cell edge UE, and the subband 1 transmits with high power, and the coverage is in the solid line frame, and can reach the gNB2. Since the UE UL of gNB2 is transmitted by subband 2, the DL of gNB1 does not cause CLI for all ULs of gNB2 at this time. Therefore, the cross-link interference of the base station to the base station is eliminated.
  • the gNB1 cell center UE transmits the UL to gNB1, and the sub-band 1 transmits according to the power set by the uplink power control.
  • the UE transmitting UL in the cell center generally does not cause a CLI to the neighboring center UE (subband 1/2/3) and the neighboring edge UE (subband 2) DL, or the CLI can be ignored.
  • the former is because the center of the cell 1 is far from the center of the cell 2, and the UL transmission power of the cell center UE is generally low. The latter is mainly due to the different sub-bands used.
  • the gNB1 cell edge UE transmits the UL to the gNB1, and the subband 1 transmits according to the power set by the uplink power control.
  • the UE UL at the cell edge generally does not cause a CLI for the neighboring center UE (subband 1/2/3) and the neighboring edge UE (subband 2) DL, or the CLI can be ignored.
  • the former is because the edge of the cell 1 is far from the center of the cell 2.
  • the latter is mainly due to the different sub-bands used.
  • an embodiment of the present disclosure provides an apparatus for eliminating interference, including:
  • the subband setting module 501 is configured to determine a primary subband and a secondary subband of the cell: the primary subband and the secondary subband of one cell are set to different subbands, and the primary subband of one cell and the primary subzone of the neighboring cell of the cell The bands are set to different sub-bands;
  • the transmission control module 502 is configured to use the primary sub-band and/or the secondary sub-band of the cell to transmit in a downlink direction of the cell, and use the primary sub-band of the cell to transmit in an uplink direction of the cell.
  • the subband setting module is configured to determine the primary subband and the secondary subband of the cell in the following manner:
  • Determining the number and range of subbands dividing the system bandwidth into multiple subbands, each subband includes one or more resource blocks RB, and any two subbands do not cross each other and do not overlap each other;
  • each RB in one subband is continuous or discontinuous; different subbands contain the same or different numbers of RBs.
  • the transmission control module is configured to use the primary subband and/or the secondary subband of the cell to transmit in the downlink direction of the cell in the following manner:
  • the downlink communication between the base station and the cell edge user equipment UE is sent by using a primary sub-band, and the transmission power is greater than or equal to a high power threshold;
  • the downlink communication of the base station to the cell center UE is transmitted by using the primary subband and/or the secondary subband; when the downlink communication of the base station to the cell center UE is transmitted on the secondary subband, the transmission power is less than or equal to the low power threshold.
  • the transmission control module is configured to use the primary sub-band and/or the secondary sub-band of the cell to transmit in the downlink direction of the cell, and use the primary sub-band of the cell to transmit in the uplink direction of the cell.
  • the transmission control module is configured to determine interference of cross-link interference between the target cell and the neighboring cell in the following manner, and interact with the interference situation between the target cell and the neighboring cell and reduce the interference situation. Coordination of interference:
  • the target cell increases uplink transmit power
  • the neighboring cell of the target cell reduces downlink transmission power
  • the target cell uplink uses a primary subband for transmission
  • the neighboring cell of the target cell downlink uses the primary sub-band for transmission
  • the edge region of the neighboring cell of the target cell is downlinked and transmitted using the primary subband.
  • the transmission control module is configured to determine interference of cross-link interference between the target cell and the neighboring cell in the following manner, and interact with the interference situation between the target cell and the neighboring cell and reduce the interference situation. Coordination of interference, including:
  • the target cell reduces uplink transmit power
  • the neighboring cell of the target cell increases downlink transmit power
  • the target cell uplink uses a primary subband for transmission
  • the neighboring cell of the target cell downlink uses the primary sub-band for transmission
  • the edge region of the neighboring cell of the target cell is downlinked and transmitted using the primary subband.
  • the transmission control module is configured to determine interference of cross-link interference between the target cell and the neighboring cell in the following manner, and interact with the interference situation between the target cell and the neighboring cell and reduce the interference situation. Coordination of interference, including:
  • the target cell increases downlink transmit power
  • the neighboring cell of the target cell reduces uplink transmit power
  • the target cell downlink uses a primary sub-band for transmission
  • the edge area of the target cell is downlinked using a primary sub-band for transmission
  • the neighboring cell of the target cell uplink uses the primary subband for transmission.
  • the transmission control module is configured to determine interference of cross-link interference between the target cell and the neighboring cell in the following manner, and interact with the interference situation between the target cell and the neighboring cell and reduce the interference situation. Coordination of interference, including:
  • the target cell reduces downlink transmit power
  • the neighboring cell of the target cell increases uplink transmit power
  • the target cell downlink uses a primary sub-band for transmission
  • the edge area of the target cell is downlinked using a primary sub-band for transmission
  • the neighboring cell of the target cell uplink uses the primary subband for transmission.
  • the transmission control module is configured to determine interference of cross-link interference between the target cell and the neighboring cell in the following manner:
  • the base station of the target cell and/or the neighboring cell acquires a measurement quantity for characterizing the cross-link interference level, the measurement quantity including at least one of the following measurement quantities:
  • the measurement quantity used to characterize the downlink interference of the neighboring cell received by the uplink of the cell cross-link interference-uplink-overload indication CLI-UL-OI;
  • the measurement quantity used to characterize the uplink interference of the neighboring cell received by the downlink of the cell cross-link interference-downlink-overload indication CLI-DL-OI;
  • the measurement quantity used to characterize the interference that the downlink of the cell may cause to the uplink of the neighboring cell: cross-link interference-downlink-high interference indication CLI-DL-HII;
  • a measurement quantity used to characterize a reference signal received power level between a cell base station and a neighboring cell base station cross-link interference-reference signal received power-base station CLI-RSRP-gNB;
  • Means for characterizing a reference signal received power level between the cell user equipment UE and the neighboring cell UE cross-link interference-reference signal received power-user equipment CLI-RSRP-UE;
  • the transmission control module is configured to exchange the interference situation between the target cell and the neighboring cell in the following manner:
  • the measurement amount is exchanged between the base stations of the target cell and/or the neighboring cell by: backhaul link and/or air interface signaling.
  • the backhaul link includes: an X2 interface or a private interface.
  • the measurement quantity measured by the user equipment UE and fed back to the base station includes at least one of the following:
  • the measurement quantity used to characterize the uplink interference of the neighboring cell received by the downlink of the cell cross-link interference-downlink-overload indication CLI-DL-OI;
  • Means for characterizing a reference signal received power level between the cell user equipment UE and the neighboring cell UE cross-link interference-reference signal received power-user equipment CLI-RSRP-UE;
  • the embodiment of the present disclosure provides a method for eliminating interference, including:
  • the base station acquires a measurement quantity for measuring a cross-link interference level.
  • the base station and the neighboring cell base station exchange the measurement quantity for measuring the cross-link interference level.
  • the measurement amount includes at least one of the following measurement amounts:
  • the measurement quantity used to characterize the downlink interference of the neighboring cell received by the uplink of the cell cross-link interference-uplink-overload indication CLI-UL-OI;
  • the measurement quantity used to characterize the uplink interference of the neighboring cell received by the downlink of the cell cross-link interference-downlink-overload indication CLI-DL-OI;
  • the measurement quantity used to characterize the interference that the downlink of the cell may cause to the uplink of the neighboring cell: cross-link interference-downlink-high interference indication CLI-DL-HII;
  • a measurement quantity used to characterize a reference signal received power level between a cell base station and a neighboring cell base station cross-link interference-reference signal received power-base station CLI-RSRP-gNB;
  • a measure for characterizing a reference signal received power level between the cell user equipment UE and the neighboring cell UE cross-link interference-reference signal received power-user equipment CLI-RSRP-UE.
  • the measurement quantity measured by the user equipment UE and fed back to the base station includes at least one of the following:
  • the measurement quantity used to characterize the uplink interference of the neighboring cell received by the downlink of the cell cross-link interference-downlink-overload indication CLI-DL-OI;
  • a measure for characterizing a reference signal received power level between the cell user equipment UE and the neighboring cell UE cross-link interference-reference signal received power-user equipment CLI-RSRP-UE.
  • the base station and the neighboring cell base station exchange the measurement quantity for measuring the cross-link interference level, including:
  • the base station and the neighboring cell base station exchange measurement quantities in the following manner: backhaul link and/or air interface signaling.
  • the backhaul link includes: an X2 interface or a private interface.
  • the base station obtains the measurement result of the measurement quantity and the measurement result of the measurement quantity of the interaction with the neighboring base station.
  • the base station can adjust its own transmission policy according to the measurement result of the measurement quantity (for example, increase/decrease power, or replace The sub-band is transmitted, so as to reduce the influence of the neighboring cell on the cross-link interference of the neighboring cell, or reduce the cross-link interference of the neighboring cell to the neighboring cell.
  • the neighboring base station can adjust the transmission policy of the neighboring base station (for example, increase/decrease power, or schedule, or replace the transmission subband, etc.) according to the obtained measurement result of the measured quantity of the base station, and can also reduce the neighboring cell pair.
  • the cross-link interference of the cell or the influence of interference of the neighboring cell by the cell effectively reduce the impact of cross-link interference on system performance, and improve the performance of the dynamic TDD system or the like.
  • an embodiment of the present disclosure provides an apparatus for eliminating interference, which is applied to a base station, and includes:
  • a measurement quantity obtaining module 701, configured to acquire a measurement quantity for measuring a cross-link interference level
  • the measurement quantity interaction module 702 is configured to exchange the measurement quantity for measuring the cross-link interference level with the neighboring cell base station.
  • the measurement amount includes at least one of the following measurement amounts:
  • the measurement quantity used to characterize the downlink interference of the neighboring cell received by the uplink of the cell cross-link interference-uplink-overload indication CLI-UL-OI;
  • the measurement quantity used to characterize the uplink interference of the neighboring cell received by the downlink of the cell cross-link interference-downlink-overload indication CLI-DL-OI;
  • the measurement quantity used to characterize the interference that the downlink of the cell may cause to the uplink of the neighboring cell: cross-link interference-downlink-high interference indication CLI-DL-HII;
  • a measurement quantity used to characterize a reference signal received power level between a cell base station and a neighboring cell base station cross-link interference-reference signal received power-base station CLI-RSRP-gNB;
  • a measure for characterizing a reference signal received power level between the cell user equipment UE and the neighboring cell UE cross-link interference-reference signal received power-user equipment CLI-RSRP-UE.
  • the measurement quantity measured by the user equipment UE and fed back to the base station includes at least one of the following:
  • the measurement quantity used to characterize the uplink interference of the neighboring cell received by the downlink of the cell cross-link interference-downlink-overload indication CLI-DL-OI;
  • a measure for characterizing a reference signal received power level between the cell user equipment UE and the neighboring cell UE cross-link interference-reference signal received power-user equipment CLI-RSRP-UE.
  • the measurement quantity interaction module is configured to interact with the neighboring cell base station to measure the measurement amount of the cross-link interference level in the following manner:
  • the measurement quantity is exchanged with the neighboring cell base station in the following manner: backhaul link and/or air interface signaling.
  • the backhaul link includes: an X2 interface or a private interface.
  • Embodiments of the present disclosure also provide a storage medium that can be configured to store program code for performing the above steps.
  • the method according to the foregoing embodiment can be implemented by means of software plus a necessary general hardware platform, or can also be implemented by hardware.
  • the technical solution of the present invention may be embodied in the form of a software product stored in a storage medium (such as a ROM/RAM, a magnetic disk, an optical disk), including a plurality of instructions for making a terminal.
  • the device (which may be a cell phone, computer, server, or network device, etc.) performs the methods described in various embodiments of the present invention.
  • the present disclosure is applicable to the field of wireless communication technologies to solve the problem of cross-link interference.

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

Abstract

L'invention concerne un procédé et un dispositif d'élimination d'interférences, ainsi qu'un support d'informations. Le procédé consiste : à déterminer une sous-bande primaire et une sous-bande secondaire d'une cellule, la sous-bande primaire et la sous-bande secondaire de la cellule étant configurées pour être différentes sous-bandes, et une sous-bande primaire d'une autre cellule voisine de ladite cellule et la sous-bande primaire de la cellule étant configurées pour être des sous-bandes différentes ; et à utiliser la sous-bande primaire et/ou la sous-bande secondaire de la cellule pour effectuer une transmission dans une direction de liaison descendante de la cellule, et à utiliser la sous-bande primaire de la cellule pour effectuer une transmission dans une direction de liaison montante de la cellule. La présente invention peut résoudre un problème d'interférence de liaison croisée.
PCT/CN2017/117124 2017-01-26 2017-12-19 Procédé et dispositif d'élimination d'interférences, et support d'informations WO2018137444A1 (fr)

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