WO2018126792A1 - Procédé et dispositif de mesure d'interférence, procédé de mesure de décalage temporel, et support de stockage - Google Patents

Procédé et dispositif de mesure d'interférence, procédé de mesure de décalage temporel, et support de stockage Download PDF

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Publication number
WO2018126792A1
WO2018126792A1 PCT/CN2017/110753 CN2017110753W WO2018126792A1 WO 2018126792 A1 WO2018126792 A1 WO 2018126792A1 CN 2017110753 W CN2017110753 W CN 2017110753W WO 2018126792 A1 WO2018126792 A1 WO 2018126792A1
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Prior art keywords
measurement
configuration information
interference
information
communication device
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English (en)
Chinese (zh)
Inventor
徐汉青
赵亚军
杨玲
李新彩
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay

Definitions

  • the Long Term Evolution (LTE) system supports the implementation of Frequency Division Duplex (FDD) operations on a pair of spectrums (downstream operation on one carrier and uplink operation on another carrier). It also supports the implementation of Time Division Duplex (TDD) operations on an unpaired carrier.
  • the existing TDD operation mode can only apply a limited number of uplink and downlink subframe allocation configurations (corresponding to configuration 0 to configuration 6), and the same configuration is adopted between adjacent cells, that is, the same transmission direction is used.
  • the enhanced interference mitigation and traffic adaptation (eIMTA) can configure the uplink and downlink directions of the LTE system in a semi-static manner (above 10ms), and different TDD uplink and downlink links can be used in the adjacent areas.
  • the configuration of frame allocation, but these configurations are still limited to the above limited centralized configuration.
  • a third aspect of the embodiments of the present invention provides an interference measurement apparatus, which is applied to a first communication device, and includes:
  • the first receiving unit is configured to receive the first sending configuration information, where the first sending configuration information is configuration information that the second communications device sends the first reference signal; if the second communications device is the first base station, The first communication device is the second base station or the user equipment UE connected to the cell formed by the second base station; if the second communication device is the first UE, the first communication device is the second UE or the a neighboring base station of a base station to which the first UE is connected;
  • a fourth aspect of the embodiments of the present invention provides an interference measurement apparatus, which is applied to a second communication device, and includes:
  • a second forming unit configured to acquire first sending configuration information of the first reference signal, where the first communications device is the second base station or connected to the second base station if the second communications device is the first base station a user equipment UE in the formed cell; if the second communication device is the first UE, the first communication device is a second UE or a neighboring base station of the base station to which the first UE is connected;
  • the second sending unit is further configured to send the first reference signal according to the first sending configuration information, where the first reference signal is used by the first communications device to form a first measurement result.
  • a sixth aspect of the embodiments of the present invention provides a method for measuring a timing offset, including:
  • the user terminal UE receives configuration information sent by the base station;
  • the UE reports the timing deviation measurement result of the cross-link cross link to the base station.
  • a sixth aspect of the embodiments of the present invention provides a communications device, including: a communications interface, a memory, and a processor;
  • the communication interface is configured to send and receive information
  • the memory is configured to store information
  • the processor is respectively connected to the communication interface and the memory, configured to implement an interference measurement method provided by one or more of the foregoing solutions by executing computer executable code stored on the memory, or A timing deviation measurement method provided by one or more technical solutions.
  • the configuration information of the cross reference signal is transmitted between the communication devices of the two cross-links, and the communication device that performs the measurement performs measurement according to the received transmission configuration information, thereby obtaining interference across the link. Measurements facilitate subsequent interference coordination across links; thereby reducing cross-link interference and improving communication quality.
  • FIG. 1 is a schematic flowchart of a first interference measurement method according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a second interference measurement method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a first interference measuring apparatus according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a first interference measuring apparatus according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram of interference of a second cross-link interference according to an embodiment of the present invention.
  • Step S110 The first communication device acquires first sending configuration information, where the first sending configuration information is configuration information that the second communications device sends the first reference signal; if the second communications device is the first base station, The first communication device is the second base station or the user equipment UE connected to the cell formed by the second base station; if the second communication device is the first UE, the first communication device is the second UE or the a neighboring base station of a base station to which the first UE is connected;
  • Step S120 Perform measurement on the first reference signal according to the first sending configuration information to form a first measurement result.
  • the first measurement result may be used for interference coordination across links.
  • the interference measurement method in this embodiment may be an interference measurement method applied to various first communication devices such as a base station or a UE.
  • the first communication device and the second communication device herein are both communication devices of a wireless communication network.
  • the base station may be an evolved base station (eNB), a next generation base station (gNB), a home base station, a small cell base station, or various access points (Access). Point, AP) and other communication devices that can be accessed by other devices.
  • eNB evolved base station
  • gNB next generation base station
  • AP access point
  • AP access point
  • the base station of the information may be a base station of a cell in which the UE is located, or may be a base station of the first communication device. If the first sending configuration information is configured by the first communications device, the obtaining includes reading the first sending configuration information or configuring the first sending configuration information, and if configured by other base stations, may include other base stations. Receiving the first configuration information.
  • the resource location may include: a time domain resource location, a frequency domain resource location;
  • the beam parameter may include at least one of a beam index, a beam direction, and a beam width.
  • the first communication device and the second communication device may both be UEs, so that the interference between the UEs may be known by the execution of the foregoing steps S110 to S120, for example, the uplink transmission of the UE1 interferes with the downlink reception of the UE2. .
  • the first communication device if the first communication device and the second communication device are both base stations, the first communication device returns a private interface or an air interface between the link or other base stations through the X2 interface (Over The Air) , OTA) signaling, interacting with the first transmission configuration information. If the first communication device and the second communication device are both UEs, the first transmission configuration information may be exchanged between the UEs through an interface such as a Device to Device (D2D).
  • D2D Device to Device
  • the first communication device performs measurement of the first reference signal according to the first sending configuration information, thereby obtaining a cross-link interference condition of the second communications device to the first communications device.
  • the first reference signal may be a reference signal that is transmitted periodically, for example, a periodically transmitted signal.
  • the second reference signal may also be a trigger transmit signal.
  • the trigger transmission signal is a signal that is transmitted when the preset trigger condition is satisfied.
  • the signal transmission parameter of the second communication device is changed. For example, if the transmission power is increased, it may cause a neighboring base station or The UE in the neighboring base station receives the interference.
  • the direction of signal generation of the second communication device changes. These are trigger events that satisfy the preset trigger condition.
  • the triggering event in this embodiment may further include: the first communication device or the second communication device detects that the quality of the signal transmission and reception is degraded, and the interference is enhanced.
  • the first communications device may send a trigger signal to the second communications device when the triggering event that meets the preset triggering condition is detected, triggering the second communications device to form the first Send configuration information as soon as it is sent.
  • the first reference signal may carry the sender identifier information, where the sender identifier information may include the device identifier of the second communications device or the cell identifier of the cell formed by the second communications device.
  • the second reference signal may further carry the carrier identification information, where the carrier identification information may be used to indicate a carrier that sends the first reference signal.
  • the carrier identification may include the beam identification.
  • Step S112 Send the first measurement configuration information to the third communication device, or, according to The first measurement configuration information is used to perform resource scheduling, where the first measurement configuration information includes at least: first silent configuration information, where the first silent configuration information is used to indicate that the third communication device is prohibited from transmitting a predetermined time frequency of the signal.
  • the third communications device includes at least one of: the second communications device, a neighboring device of the first communications device, and a communications device to which the first communications device is connected.
  • the first communications device may further perform resource scheduling according to the first measurement information. For example, in the predetermined time-frequency resource, a time-frequency resource that the UE or other communication device sends a signal to itself is not allocated, for example, the predetermined time-frequency resource is set to prohibit scheduling or invalid resources, thereby achieving the effect of prohibiting scheduling.
  • Measuring subframe information used to indicate a measurement subframe
  • the measurement pattern information is used to indicate the time and/or frequency resource at which the measurement is taken.
  • the channel may indicate a transmitting device to a receiving device.
  • the cell is a transmitting cell of the first reference signal.
  • the measurement object information may further indicate a transmitting device of the first reference signal
  • the first communication device knows when to listen to the first reference signal on which spectrum, and sends the first measurement information to other communication devices, then the communication devices can be
  • the first measurement configuration information performs a silent operation, where the silent operation is a device that does not send a signal to the first communication device.
  • Silent subframe information used to indicate a silent subframe in which a signal is prohibited from being transmitted
  • Silent time slot information used to indicate a silent time slot for which transmission of a signal is prohibited
  • Silent time-frequency pattern information for indicating time-frequency resources for which transmission of signals is prohibited
  • Quiet port information used to indicate the port that is prohibited from sending signals
  • the first communication device may monitor the first reference signal in some subframes or in certain time slots, that is, measure the first reference signal.
  • Transmitting period information configured to indicate a sending period of the first reference signal
  • Sending pattern information indicating time-frequency resources for transmitting the first reference signal
  • the second silent configuration information is used to indicate a predetermined time-frequency resource that the third communications device sends a signal, and/or a basis for generating the first silent configuration information for the first communications device.
  • the method further includes:
  • the third type is the third type.
  • At least one of the first communication device and/or the second communication device reduces the frequency of use of time-frequency resources that cause interference, thereby reducing mutual interference as a whole.
  • the cell is divided into a central area and a peripheral area around the central area, and the time-frequency resources with interference between the two base stations are used from the user equipment scheduled to the peripheral area, and are changed to be used by the user equipment scheduled for the central area.
  • the first measurement result is interference measurement from the second communication device to a first channel of the first communication device; the second communication device from the first communication device is a second channel ;
  • the method further includes:
  • the second communication device needs to receive the second reference signal sent by the first communication device to obtain the second measurement result.
  • the method is based on the step S110 to the step S120, the method further includes: the first communications device sends second sending configuration information to the second communications device; and based on the second sending configuration information Transmitting a second reference signal, wherein the second reference signal is used to form a second measurement result from the first communication device to the second communication device.
  • the first measurement result and the second measurement result can be obtained, and the cross-link interference of the first channel and the second channel is simultaneously avoided according to the first measurement result and the second measurement result.
  • the step S120 may include:
  • measuring the first reference signal When performing statistical cross-link interference measurement, measuring the first reference signal to obtain a wireless signal management RRM measurement result and/or channel measurement result and/or interference condition information;
  • the first reference signal is measured to obtain an interference source and/or interference direction and/or channel state information result and/or interference condition information.
  • the statistical cross-link interference measurement is performed by performing multiple cross-link interference measurement within a predetermined time period or a corresponding frequency band, and then performing statistics on multiple cross-link interference measurement measurements to obtain statistics.
  • the result of the measurement for example, calculates the mean of multiple cross-link interference measurements as the final measurement of the cross-link interference measurement.
  • the instantaneous cross-link interference measurement is: performing a measurement within a short duration or within a frequency band, and the result of the measurement is directly used as a measurement result of the final cross-link interference measurement.
  • the time-frequency resource used by the first reference signal is a semi-static scheduling resource, and when performing measurement, it is required to obtain a radio signal management RRM measurement result and/or a channel measurement result and/or interference condition information. If the time-frequency resource used by the first reference signal is a dynamic scheduling resource, it is necessary to determine the interference source and/or the interference direction when performing the measurement.
  • the second communication device may be configured to transmit by using an omnidirectional antenna or a directional antenna beam when transmitting the first reference signal.
  • step S120 may include:
  • the beam identification information is used as a component of the first measurement result, so that it can be known according to the first measurement result whether the corresponding beam causes cross-link interference.
  • the beam identification information may be carried on the beam, and in the embodiment, the identification beam identification information may include:
  • the beam configuration may be sent according to the beam configuration time and/or the transmission angle.
  • Information the beam identification information is obtained.
  • the first measurement result is used to compare with a comparison threshold to form a comparison result; the comparison result is used to determine whether the cross-link interference and/or the cross-link interference exists degree.
  • a comparison threshold is also set in this embodiment.
  • the comparison threshold may be one or more.
  • the comparison threshold is one, and the signal strength measured by the first measurement result is compared with the comparison threshold. If the comparison threshold is greater than the comparison threshold, cross-link interference may be considered. Comparing the thresholds, it can be considered that there is no cross-link interference.
  • the comparison threshold includes a first threshold and a second threshold.
  • the first threshold is not equal to the second threshold.
  • the first threshold may be used as a threshold for determining whether there is cross-link interference
  • the second threshold may be used as a threshold for determining the severity of cross-link interference.
  • the first measurement result and/or the second measurement result may be compared with the first threshold and the second threshold to quickly obtain whether there is cross-link interference and severity, or may be first and first. Threshold comparison, according to the comparison result with the first threshold, it is determined that there is cross-link interference, and then with the second threshold, the degree of interference across the link is obtained.
  • the second communication device is a victim device; if the first communication device is a victim device, the first communication device is Interfering with the device.
  • the device that sends the first reference signal in this embodiment may be an interference device or a victim device, and the second communication device is a victim device or an interference device that measures the first reference signal.
  • this embodiment provides an interference measurement method, including:
  • Step S210 The second communication device acquires first sending configuration information of the first reference signal. If the second communications device is the first base station, the first communications device is the second base station or is connected to the second base station. a user equipment UE in the formed cell; if the second communication device is the first UE, the first communication device is a second UE or a neighboring base station of the base station to which the first UE is connected;
  • Step S220 Send the first reference signal according to the first sending configuration information, where the first reference signal is used by the first communications device to form a first measurement result.
  • the method in this embodiment is applied to an interference measurement method in a transmitting end of the first reference signal.
  • the second communications device obtains the first sending configuration information before sending the first reference signal.
  • the second communications device is a base station, and the second The communication device also sends the first transmission configuration information, informing the first communication device to prepare to receive the first reference signal, and measuring the first reference signal, thereby performing cross-link interference measurement to form the first measurement result, It is convenient to perform interference coordination according to the first measurement result, reduce cross-link interference, and improve communication quality.
  • the second communication device is a UE
  • the first communication device is a base station
  • the first communication device at this time may be the first configured base station that sends configuration information, and does not need the UE to notify the first
  • the first communication device may receive from the base station configuring the first transmission configuration information for the UE, or the UE may also send the first transmission configuration information to the first communication device.
  • the first measurement result can be used for interference coordination across links.
  • the method further includes:
  • the first measurement configuration information at least: first silence configuration information
  • the first sending configuration information includes at least one of the following:
  • Transmitting subframe information configured to indicate a sending subframe of the first reference signal
  • Sending pattern information indicating time-frequency resources for transmitting the first reference signal
  • the second silent configuration information is used to indicate a predetermined time-frequency resource that the third communications device sends a signal, and/or a basis for generating the first silent configuration information for the first communications device.
  • the second silent configuration information may be used as a basis for forming the first silent configuration information, and the step of forming the first measurement configuration information by the first communication device is simplified.
  • the first measurement result is an interference measurement from the second communication device to a first channel of the first communication device
  • the method further includes:
  • a second measurement result of the second channel from the first communication device to the second communication device is obtained based on channel reciprocity and the first measurement result.
  • the second communications device may be specifically configured to perform interference coordination across links in combination with the first measurement result and the second measurement result.
  • the information content and/or the information format of the second transmission configuration information is similar to the first transmission configuration information.
  • various information such as transmission subframe information, transmission slot information, transmission pattern, and the like may be included.
  • the unification of the information content and format of the first transmission configuration information and the second transmission configuration information facilitates information interaction and demodulation between the respective communication devices.
  • the embodiment provides an interference measurement apparatus, which is applied to a first communication device, and includes:
  • the first receiving unit 110 is configured to receive first sending configuration information of the first reference signal sent by the second communications device; wherein, if the second communications device is the first base station, the first communications device is the second base station or Connecting to the user equipment UE in the cell formed by the second base station; if the second communication device is the first UE, the first communication device is the second UE or the base station to which the first UE is connected Neighboring base station
  • the first measurement unit 120 is configured to perform measurement on the first reference signal to form a first measurement result according to the first sending configuration information
  • the first measurement result is used for interference coordination across links.
  • the interference measuring device provided in this embodiment is a measuring device applied to the first communication device.
  • the first receiving unit 110 may correspond to a receiving antenna, where the receiving antenna may be an omnidirectional antenna or a directional antenna.
  • the first measurement result in this embodiment can be used to perform cross-link interference coordination.
  • the apparatus further includes:
  • the first coordination unit is configured to perform interference coordination across links according to the first measurement result.
  • Another embodiment of the present invention provides another timing offset measurement, including:
  • the uplink receiving base station is subjected to cross-link interference of the adjacent downlink transmitting base station, and the cross-link interference needs to be reduced to improve the communication quality.
  • the cross-link interference is required. Measurement.
  • the downlink transmission of the second base station gNB2 causes cross-link interference between the base stations for uplink reception of the first base station gNB1.
  • gNB1 needs to measure channel/interference conditions of gNB2 to gNB1.
  • gNB1 When gNB1 is measured, in addition to receiving the reference signal transmitted by gNB2, there may be interference from gNB1 neighboring base stations or UEs in other cells, such as gNB3 or UE3-1 in FIG. 6, resulting in inaccurate measurement.
  • the transmitting base station transmits a reference signal for measurement. For example, when an interfering base station transmits a DL, cross-link interference is caused to the interfered base station UL reception. During the measurement process, the interfering base station transmits a reference signal for measurement. Therefore, the transmitting base station here is an interfering base station, such as gNB2 in FIG.
  • the reference signal can be used at least for cross-link interference measurement between gNBs.
  • the cross-link interference measurements in this example may include: RRM measurements, CSI/CQI measurements, or interference measurements, or path loss measurements.
  • the reference signal used for base station measurement may be a DL DMRS, a CSI-RS, or a dedicated measurement signal; a new measurement signal such as a newly designed signal for RRM measurement or channel/interference measurement, such as an uplink and downlink RS symmetric DL RS.
  • the reference signal used for base station measurement is a CSI-RS.
  • the dedicated measurement signal in this example can be a specially designed measurement signal.
  • the reference signal carries cell/base station identifier (Identiy, ID) information.
  • the method includes at least one of: a cell physical ID, or a sending point ID (such as a TRP ID or an AP ID), or a cell/base station/sending device number.
  • the carrying method can be implicit or displayed.
  • the implicit method can be generated by scrambling or participating in the sequence of reference signals by the above ID.
  • the sub-frame/slot configuration information is used to indicate in which subframes/time slots the gNB transmits the reference signal, which is generally determined by a corresponding transmission period and/or a transmission offset, or a non-period trigger transmission.
  • the pattern configuration information is sent to indicate a time-frequency pattern of the RS (CSI-RS) transmitted by the gNB, such as which symbols and which REs of the subframe/slot are to transmit the reference signal.
  • CSI-RS time-frequency pattern of the RS
  • the gNB measurement configuration information includes at least one of: measurement object information, measurement subframe/slot configuration information, measurement period/measurement offset/measurement duration information, measurement pattern configuration information, and muted-RS resource configuration information.
  • Measuring subframe/slot configuration information for indicating which subframes/time slots the gNB receives or measures the reference signal generally determined by a corresponding measurement period and/or measurement offset and/or measurement duration, or Cycle triggered measurements.
  • the measurement pattern configuration information is used to indicate a time-frequency pattern of the gNB measurement RS (CSI-RS), such as which symbols and which REs of the subframe/time slot are used to measure the reference signal.
  • CSI-RS gNB measurement RS
  • Muted-RS resource configuration information for indicating a subframe/time slot in which a muted-RS is transmitted, or a time-frequency resource pattern, or a port, and the RS is transmitted at zero power on these resources.
  • the base station measures the channel/interference conditions of the neighbors on these resources.
  • the neighboring gNB1, gNB2, and gNB3 in FIG. 6 transmit configuration information and/or through the following reference signal CSI-RS through a backhaul (such as an X2 interface or a private interface) or an air interface (such as OTA signaling). Or gNB to measure configuration information.
  • a backhaul such as an X2 interface or a private interface
  • an air interface such as OTA signaling
  • gNB1 and gNB2 are adjacent to each other, and gNB1 and third base station gNB3 are also adjacent to each other. That is, the neighboring region of gNB1 is gNB2 and gNB3; the neighboring region of gNB2 is gNB1; the neighboring region of gNB3 is gNB1. These configuration information can only interact between neighbors.
  • the measurement configuration information of the measurement base station can be generated according to the signal transmission configuration of the transmission base station.
  • the measurement subframe/slot of the measurement base station may be a subset or a complete set of transmission subframes/time slots of the transmission reference signal in the transmission configuration information.
  • the transmission base station signal transmission period is 20 ms (assuming the offset is 0), that is, it is transmitted in subframes such as subframe 0/20/40/60/80.
  • the measurement period of the measurement base station is 40 ms, that is, it is measured in subframes such as subframe 0/40/80.
  • the transmitting base station sends the reference signal periodically, or it can be sent aperiodically.
  • the aperiodic transmission may include: triggering transmission based on a triggering event.
  • the measurement base station measurement cross-link interference can also be aperiodic or triggered measurement.
  • the reference signal of the transmitting base station is transmitted periodically, and the measurement of the measuring base station is a non-periodic measurement.
  • other gNBs in the vicinity of the gNB are measured according to the measurement configuration of the measurement gNB, performing a silent operation operation in the measurement resource, not transmitting the channel/signal, or working in a muted-RS/transmission power of zero.
  • Other gNBs here do not include sending gNBs.
  • gNB3 also does not transmit channels/signals or perform muted-RS operations in the measurement resources of gNB1 according to the measurement configuration of gNB1.
  • gNB3 notifies its subordinate UE, and the subordinate UE performs a silent operation in the measurement resource of gNB1, and does not transmit a UL signal or a channel.
  • At least one of the following channel or interference information can be obtained: accurate channel measurement result, channel matrix, eigenvector, covariance matrix, interference matrix, interference intensity (or interference intensity level division), RRM measurement result, CQI/PMI/ RI.
  • measuring gNB measures RSRP or path loss.
  • the measurement base station receives the UL, the cross-link interference received by the transmitting base station DL is smaller. Then the cross-link interference at this time should have less impact on the uplink power of the UE.
  • the cross-link interference measurement result is close to or approximately equal to 0, the cross-link interference does not affect the uplink power of the UE.
  • the greater the cross-link interference the larger the uplink power of the UE should be.
  • the UL transmission of the measurement gNB can raise the power, delay the transmission, and change the modulation and coding strategy (MCS). ), change the transmit carrier, cancel the transmission, and so on.
  • MCS modulation and coding strategy
  • Step 5 When the measurement gNB transmits the DL signal, it also causes cross-link interference to the UL reception of the transmitting gNB. Therefore, transmitting the gNB also requires obtaining a channel/interference condition between the measurement gNB and the transmitting gNB.
  • the transmitting gNB can convert the channel/interference condition between the measurement gNB and the transmitting gNB.
  • the channel matrix of the gNB to the transmitting gNB is obtained by transposing the channel matrix of the transmitting gNB to the measuring gNB.
  • Steps 1 to 3 are performed, and the gNB measurement is sent to obtain a channel/interference condition between the measurement gNB and the transmitting gNB. At this time, the measurement gNB transmits the reference signal, and the transmission gNB performs the measurement.
  • the base station that performs the downlink transmission is performing the measurement, and the downlink transmitting base station causes cross-link interference to the neighboring other uplink receiving base stations.
  • the main purpose of the measurement is to reduce the downlink transmission of the base station to the uplink receiving of other base stations. Link interference.
  • the transmitting base station is a victim base station, such as gNB1 of FIG. 6, and the transmitting base station transmits a reference signal for measurement.
  • the measurement base station is an interference base station, as shown in gNB2 of FIG. 6, the measurement base station receives the reference signal transmitted by the transmission base station, and performs measurement.
  • RSRP received power
  • path loss of the gNB measurement reference signal For example, measuring the received power (RSRP) or path loss of the gNB measurement reference signal.
  • the measurement base station transmits the DL signal the cross-link interference caused to the UL signal reception of the transmitting base station is larger. Then, the downlink power of the measurement base station needs to be reduced, or the interference coordination mechanism such as step 4 is used to reduce the impact of the cross-link interference caused by the UL reception of the transmitting base station.
  • the measurement process of this example is the same as or similar to the measurement process of the first example (especially steps one to three).
  • the measurement results of the present example may also be obtained from the first example steps 1 through 3 based on channel reciprocity.
  • Measurement/coordination between two or more UEs is involved to enable cross-link interference measurement between UEs.
  • the downlink receiving UE is subjected to the cross-link interference of the neighboring uplink transmitting UE, and the measurement result after the measurement may be used to reduce the cross-link interference that other UEs uplink transmit to the downlink receiving of the UE.
  • Step 1 The transmitting UE sends a reference signal according to the sending configuration information.
  • the measurement UE receives the reference signal according to the measurement configuration information and performs measurement.
  • the measurement UE receives the reference signal transmitted by the transmitting UE, and performs measurement. For example, the DL reception of the victim UE may be interfered with by the inter-link interference transmitted by the UE UL. During the measurement process, the victim UE receives the reference signal transmitted by the interfering UE and performs measurement. Therefore, the measurement UE here is a victim UE. As shown in Figure 6 of UE2-1.
  • the transmitting UE and the measuring UE belong to different cells.
  • the transmitting UE and the measuring UE may belong to the same cell, or may belong to different cells.
  • the reference signal can be used at least for measurements between UEs, where measurements between UEs can be used for RRM measurements, CSI/CQI measurements, or interference measurements, or path loss measurements.
  • the reference signal used for UE measurement may be UL DMRS, SRS, or new measurement signal; new measurement signal such as newly designed signal for RRM measurement or channel/interference measurement, such as in uplink and downlink reference signal (RS) Uplink reference signal (UL RS).
  • new measurement signal such as newly designed signal for RRM measurement or channel/interference measurement, such as in uplink and downlink reference signal (RS) Uplink reference signal (UL RS).
  • RS uplink and downlink reference signal
  • UL RS Uplink reference signal
  • the reference signal used for UE measurement is a Channel Sounding Reference Signal (SRS).
  • the reference signals used for measurement between UEs are transmitted with a fixed power value or a preset power value. That is, the reference signal used for measurement between UEs may not be controlled by uplink power. The reason is that if the reference signal power is changed, it needs to be notified to the base station to which the UE transmitting the reference signal belongs, and it needs to be notified by the base station to the base station to which the measurement UE belongs.
  • the measurement UE assumes that the power of the measurement signal does not change.
  • the subframe/slot configuration information is sent to indicate which subframes/time slots the UE transmits the reference signal, which is generally determined by a corresponding transmission period and/or a transmission offset, or a non-period trigger transmission.
  • Transmitting pattern configuration information which is used to indicate a time-frequency pattern of the RS (SRS) sent by the UE, such as which symbols and which REs of the subframe/slot are used to transmit the reference signal; and the muted-RS resource configuration is used to indicate that the muted-RS is sent.
  • SRS RS
  • Subframe/slot, or time-frequency resource pattern, or port, and RS is transmitted at zero power on these resources.
  • the UE measurement configuration information includes at least one of: measurement object information, measurement subframe/slot configuration information, measurement period/measurement offset/measurement duration information, measurement pattern configuration information, muted-RS resource configuration information.
  • the transmission configuration information is sent by the base station to which the transmitting UE belongs to the transmitting UE.
  • the measurement configuration information is sent by the base station to which the measurement UE belongs to the measurement UE.
  • the transmitting UE transmitting the reference signal may be triggered by the base station aperiodically, and/or the measuring UE measurement reference signal may also be triggered by the base station aperiodic.
  • the sending configuration information may be sent by the base station to which the transmitting UE belongs to the base station to which the measuring UE belongs and/or the neighboring base station that sends the base station of the UE by using a backhaul link or an air interface.
  • the base station and/or the neighboring base station of the measurement UE are sent to the subordinate UE.
  • the measurement configuration information may be sent by the base station to which the UE belongs to the base station to which the transmitting UE belongs and/or the neighboring base station of the base station to which the measurement UE belongs, by using a backhaul link or an air interface.
  • the measurement configuration of the measurement UE may be generated according to the transmission configuration of the transmitting UE.
  • the measurement subframe/slot of the measurement UE may be a subset or a corpus of the transmission UE transmission configuration.
  • the period in which the UE signal is transmitted is 20 ms (assuming the offset is 0), that is, in a subframe such as subframe 0/20/40/60/80.
  • the measurement period of the measurement UE is 40 ms, that is, measured in subframes such as subframe 0/40/80.
  • the reference signal transmitted by the transmitting UE for measuring the UE measurement may be aperiodic or trigger transmission; the measurement UE measurement cross-link interference may also be aperiodic or trigger measurement. Alternatively, the former is sent periodically and the latter is aperiodic.
  • the measuring UE does not receive the downlink signal/channel from the local cell in the measurement resource.
  • the base station performs a silent operation operation or does not schedule a DL transmission in the measurement resource.
  • the UE that measures the UE does not schedule other UEs to perform UL transmission in the measurement resource.
  • the other UEs that are in the vicinity of the UE perform the silent operation operation in the measurement resource according to the measurement configuration of the measurement UE, do not send the channel/signal, or work in the muted-RS/zero transmit power mode.
  • Other UEs in the vicinity may be the same cell or neighboring cell as the measurement UE.
  • the measurement configuration of the measurement UE may be notified to the neighboring UE of the measurement UE by the base station and/or its neighbor base station measuring the UE.
  • the other UEs that cause interference to the measuring UE are muting at this time, which reduces the undetermined interference factor when measuring the UE measurement, and improves the measurement. Accuracy helps further interference coordination and elimination.
  • the measurement UE measures the channel/interference condition between the transmitting UE and the measurement UE, and can obtain an RRM measurement result (such as RSRP/RSSI/RSRQ measured by gNB), or a CSI/CQI measurement result, or an interference measurement result, or a path loss.
  • an RRM measurement result such as RSRP/RSSI/RSRQ measured by gNB
  • CSI/CQI measurement result or an interference measurement result, or a path loss.
  • At least one of the following channel or interference information may be obtained: accurate channel measurement result, channel matrix, eigenvector, covariance matrix, interference matrix, interference strength (or interference intensity level division), RRM measurement result, CQI/PMI/RI.
  • Step 2 The measurement UE reports the measurement result information to the base station to which the measurement UE belongs.
  • the base station to which the UE belongs is sent to the sending UE by using a backhaul link (such as an X2 interface) or an air interface (such as OTA signaling).
  • a backhaul link such as an X2 interface
  • an air interface such as OTA signaling
  • the measurement UE measures the channel/interference condition between the transmitting UE and the measurement UE, and can obtain an RRM measurement result (such as RSRP/RSSI/RSRQ measured by gNB), or a CSI/CQI measurement result, or an interference measurement result, or a path loss.
  • an RRM measurement result such as RSRP/RSSI/RSRQ measured by gNB
  • CSI/CQI measurement result or an interference measurement result, or a path loss.
  • the transmitted measurement result information may be accurate information or quantitative information of the foregoing measurement result, and may include at least one of the following: accurate channel measurement result, channel matrix, feature vector, and co-party Difference matrix, interference matrix, interference strength (or interference intensity level division), RRM measurement results, CQI/PMI/RI.
  • accurate channel measurement result channel matrix, feature vector, and co-party Difference matrix, interference matrix, interference strength (or interference intensity level division), RRM measurement results, CQI/PMI/RI.
  • the precise information herein may directly include various measurement values, which are information that the measurement values are processed by grading.
  • the measurement UE measures RSRP or path loss. The smaller the RSRP or the larger the path loss, the farther the transmitting UE is from the measurement UE.
  • the cross-link interference received by the transmitting UE UL is smaller. Then the cross-link interference at this time should have less impact on measuring the downlink power corresponding to the UE.
  • the cross-link interference measurement result is close to or approximately equal to 0, the cross-link interference does not affect the downlink power adjustment of the UE. The greater the cross-link interference, the larger the downlink power of the UE should be.
  • the larger the RSRP or the smaller the path loss the closer the transmitting UE is to the measurement UE.
  • the measurement UE receives the DL the cross-link interference received by the transmitting UE UL is larger. Then, the downlink power corresponding to the UE needs to be uplifted, or the interference coordination mechanism such as step 3 is used to reduce the impact of cross-link interference on the DL reception, and even the DL is not sent or delayed to be sent to the measurement UE.
  • Step 3 Perform cross-link interference coordination between two adjacent gNBs or UEs according to the measurement result or the measured measurement result information. Specifically, at least one of the following manners may be adopted:
  • the transmitting UE maps the target uplink signal/channel in the zero space of the interference channel when performing UL transmission;
  • the transmitting UE When the transmitting UE performs UL transmission, the direction of the analog beam avoids measuring the UE;
  • the measurement UE When the base station sends the DL to the measurement UE, the measurement UE does not use the omnidirectional reception, and avoids receiving the beam from the direction of the transmitting UE;
  • measuring the DL transmission corresponding to the UE may raise the power, delay the transmission, change the MCS, change the transmission carrier, Cancel sending and so on.
  • the transmitting UE sends the UL
  • the UL transmission of the transmitting UE may reduce power, delay transmission, change MCS, change transmission carrier, Cancel sending and so on.
  • Step 4 Conversely, since the measurement UE transmits the UL, it also causes cross-link interference to the DL reception of the transmitting UE. Therefore, at this time, the transmitting UE and/or the base station thereof also needs to obtain a channel/interference condition between the measurement UE and the transmitting UE.
  • the gNB to which the UE belongs may be converted to obtain the channel/interference condition between the measurement UE and the transmitting UE.
  • the channel matrix of the UE to the transmitting UE is obtained by transposing the channel matrix of the transmitting UE to the measuring UE.
  • Steps 1 to 2 are performed, and the UE is measured to obtain a channel/interference condition between the UE and the transmitting UE. At this time, the measurement UE transmits a reference signal, and the transmitting UE performs measurement.
  • the measurement is performed by the UE that is preparing/initiating the uplink transmission, and the uplink-transmitted UE may cause cross-link interference to the other downlink-received UEs.
  • the main purpose of the measurement is to reduce the uplink transmission of the UE to the downlink reception of other UEs. Link interference.
  • the transmitting UE is a victim UE, such as UE 1-2 of FIG. 6, the transmitting UE transmits a reference signal for measurement.
  • the UE is measured as an interfering UE.
  • the measurement UE receives and transmits a reference signal sent by the UE, and performs measurement.
  • the measurement UE measures RSRP or path loss.
  • the measurement UE transmits the UL, the cross-link interference caused to the DL reception of the transmitting UE is smaller, then the measurement UE can transmit with a larger UL power or normal power.
  • Cross-link interference to measure UE's uplink work The impact of control is small.
  • TX beam 1-RX beam 1, TX beam 1-RX beam 2, TX beam 1-RX beam 3, TX beam 1-RX beam 4;
  • Step 1 The base station configures and/or instructs the UE to perform cross-link timing offset measurement.
  • the UE performs cross-link timing offset measurement with the neighbor UE according to the cross-link timing offset measurement configuration or indication of the base station.
  • the UE can perform cross-link timing offset measurement simultaneously when performing CLI RRM or CLI CSI measurement.
  • the UE performs cross-link timing offset measurement on the ZP-SRS resource.
  • the neighboring UE transmits an SRS on the ZP-SRS resource of the UE.
  • the UE reports the measurement result of the cross-link timing offset to the base station, and can report the following: an exact value, a multiple of the basic time unit, and a multiple of the basic time unit multiple (for example, X, The unit is 16Ts. Ts is the basic time unit), the quantization level of the cross-link timing offset.
  • Solution 1 The base station adjusts its own DL timing according to the cross-link timing offset measurement result.
  • the downlink transmission timing for the UE may be advanced in advance.
  • the base station of the neighboring UE generates a cross-link timing advance command CLI-TA, and notifies the neighboring UE.
  • the cross-link timing advance command CLI-TA is carried by the MAC CE.
  • the neighboring UE adjusts its own uplink sending timing according to the received CLI-TA.
  • This problem can be solved by one of the following steps, or a combination of multiple steps.
  • Step 1 Configure the base station to perform cross-link timing offset measurement.
  • the configuration may include a subframe configuration, or a time slot configuration, or a time-frequency resource configuration, or a pattern configuration, or a cycle/offset/duration, etc., across the link timing offset measurements.
  • the base station can simultaneously perform cross-link timing offset measurement when performing CLI RRM or CLI CSI measurement.
  • the base station performs cross-link timing offset measurements on the ZP-CSI-RS resources.
  • the neighbor base station transmits a CSI-RS on the ZP-CSI-RS resource of the base station.
  • the base station is connected When the neighboring base station transmits the CSI-RS, it performs cross-link timing offset measurement, and does not require the local base station to configure ZP CSI-RS resources.
  • the interval between the two cross-link timing offset measurements on the base station side is longer than the cross-link timing offset measurement on the UE side. Therefore, long-period cross-link timing offset measurements can be configured, or aperiodic cross-link timing offset measurements can be triggered for a longer period of time.
  • the base station dynamically triggers cross-link interference measurements based on UL reception performance such as BLER/SINR/CLI/RRM/CSI. For example, the base station UL receiving performance is poor, or the CLI interference is large, exceeding a set threshold, and the base station triggers performing aperiodic cross-link timing offset measurement.
  • Solution 1 The base station generates a cross-link timing advance command CLI-TA according to the cross-link timing offset measurement result, and notifies the UE to the UE. For example via DCI or MAC CE.
  • the cross-link timing advance command CLI-TA is carried by the MAC CE.
  • the UE adjusts its own uplink sending timing according to the received CLI-TA. For example, the delay is transmitted across the link timing offset by a time unit.
  • the notification mode may be a backhaul (such as an X2 interface or a private interface) or an air interface (such as OTA signaling).
  • the cross-link timing offset measurement result can be notified to the neighboring base station by the following form: exact value, multiple of the basic time unit, multiple of the basic time unit multiple (eg, X, unit is 16Ts. Ts is the basic time unit), cross-link timing The quantified level of the deviation.
  • the computer storage medium a removable storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. Selected as a non-transient storage medium.
  • a sixth aspect of the embodiments of the present invention provides a communications device, including: a communications interface, a memory, and a processor;
  • the communication interface is configured to send and receive information
  • the memory is configured to store information
  • the processor is respectively connected to the communication interface and the memory, configured to implement an interference measurement method provided by one or more of the foregoing solutions by executing computer executable code stored on the memory, or A timing deviation measurement method provided by one or more technical solutions.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be through some connection.
  • the indirect coupling or communication connection of a port, device or unit may be electrical, mechanical or other form.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the above integration
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the communication terminal can exchange the configuration information of the reference signal, and the communication device that performs the measurement performs measurement according to the received transmission configuration information, thereby obtaining interference measurement across the link, thereby facilitating interference coordination of subsequent cross-links; It reduces cross-link interference, improves communication quality, and has the characteristics of simple implementation and wide application in industry.

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Abstract

Des modes de réalisation de la présente invention concernent un procédé et un dispositif de mesure d'interférence, et un procédé de mesure de décalage temporel. Le procédé comprend les étapes suivantes : un premier dispositif de communication obtient des premières informations de configuration de transmission et, dans cette étape, si un second dispositif de communication est une première station de base, le premier dispositif de communication est une seconde station de base ou un équipement d'utilisateur (UE) connecté dans une cellule formée par la seconde station de base ou, si le second dispositif de communication est un premier UE, le premier dispositif de communication est un second UE ou une station de base adjacente à une station de base connectée au premier UE ; exécuter une mesure sur un premier signal de référence, d'après les premières informations de configuration de transmission, de sorte à former un premier résultat de mesure qui sera utilisé pour coordonner des brouillages entre liaisons. Les modes de réalisation de la présente invention concernent en outre un support de stockage informatique.
PCT/CN2017/110753 2017-01-09 2017-11-13 Procédé et dispositif de mesure d'interférence, procédé de mesure de décalage temporel, et support de stockage Ceased WO2018126792A1 (fr)

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