WO2019030934A1 - Dispositif utilisateur et procédé de mesure - Google Patents

Dispositif utilisateur et procédé de mesure Download PDF

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Publication number
WO2019030934A1
WO2019030934A1 PCT/JP2017/029229 JP2017029229W WO2019030934A1 WO 2019030934 A1 WO2019030934 A1 WO 2019030934A1 JP 2017029229 W JP2017029229 W JP 2017029229W WO 2019030934 A1 WO2019030934 A1 WO 2019030934A1
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Prior art keywords
measurement
base station
user apparatus
cell
imr
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PCT/JP2017/029229
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English (en)
Japanese (ja)
Inventor
真平 安川
聡 永田
シャオツェン グオ
シン ワン
ギョウリン コウ
スウネイ ナ
Original Assignee
株式会社Ｎｔｔドコモ
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Priority to PCT/JP2017/029229 priority Critical patent/WO2019030934A1/fr
Publication of WO2019030934A1 publication Critical patent/WO2019030934A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a user equipment in a wireless communication system.
  • NR next-generation communication standard
  • LTE Long Term Evolution
  • LTE-Advanced the next-generation communication standard
  • a flexible duplex is studied, which flexibly controls resources used for DL communication and UL communication according to downlink (DL) traffic and uplink (UL) traffic generated.
  • DL downlink
  • UL uplink
  • TDD Time Division Duplex
  • DL and UL transmission directions are dynamically changed at certain time intervals such as subframes, slots and minislots. That is, as shown in FIG. 1A, in static TDD applied in LTE, a preset DL / UL configuration (configuration) common among cells is used. On the other hand, in dynamic TDD, as shown in FIG. 1B, individual DL / UL configurations are utilized in each cell. In dynamic TDD, DL / UL configuration is changed to semi-static or flexible.
  • UL communication in another cell interferes with DL communication in a certain cell (victim cell)
  • victim cell There may be a case where the user equipment in the victim cell can not properly receive the signal from the base station.
  • each base station can reduce the influence from other cells / reduce the influence to other cells, It is conceivable to determine the DL / UL configuration of the own cell.
  • the user equipment in one cell measures the reception power (eg, RSRP, RSSI) of the signal transmitted from the user equipment in another cell and reports it to the base station Conceivable. This measurement is called UE-to-UE measurement (inter-user equipment measurement).
  • RSRP reception power
  • RSSI the reception power of the signal transmitted from the user equipment in another cell
  • UE-to-UE measurement inter-user equipment measurement
  • the present invention has been made in view of the above, and it is an object of the present invention to provide a technology that enables a user device to appropriately perform measurement between user devices and report of measurement results.
  • a user equipment in a wireless communication system A configuration information management unit that holds configuration information of a plurality of measurement processes that can be used for interference measurement; A measurement unit that performs measurement using measurement resources of all or part of the plurality of measurement processes; And a signal transmission unit that reports all or part of the measurement results of the measurement unit to a base station.
  • a technology that enables a user device to appropriately perform measurement between user devices and report of measurement results.
  • FIG. 2 is a diagram showing an example of a functional configuration of a user device 100.
  • FIG. 2 is a diagram showing an example of a functional configuration of a base station 200. It is a figure which shows an example of the hardware constitutions of the user apparatus 100 and the base station 200.
  • FIG. 1 is a diagram showing an example of a functional configuration of a user device 100.
  • FIG. 2 is a diagram showing an example of a functional configuration of a base station 200. It is a figure which shows an example of the hardware constitutions of the user apparatus 100 and the base station 200.
  • the radio communication system according to the present embodiment is assumed to support at least the LTE communication scheme. Therefore, when the wireless communication system operates, the existing technology defined by the existing LTE can be used as appropriate. However, the existing technology is not limited to LTE. Also, “LTE” used in this specification has a broad meaning including LTE-Advanced and LTE-Advanced and later, unless otherwise specified. The present invention is also applicable to communication systems other than LTE.
  • FIG. 2 is a block diagram of the wireless communication system 10 in the present embodiment.
  • radio communication system 10 in the present embodiment includes user apparatuses 101, 102 and 103 (hereinafter collectively referred to as user apparatus 100) and base stations 201, 202 and 203 (hereinafter base station 200).
  • user apparatus 100 user apparatuses 101, 102 and 103
  • base stations 201, 202 and 203 hereinafter base station 200.
  • base station 200 base station
  • the wireless communication system 10 supports dynamic TDD that can control UL and DL individually for each cell.
  • the user device 100 is a communication device provided with a wireless communication function such as a smartphone, a mobile phone, a tablet, a wearable terminal, a communication module for M2M (Machine-to-Machine), etc. Use various communication services provided by 10.
  • the user equipment may for example be called "UE”.
  • the base station 200 is a communication device that provides one or more cells and performs wireless communication with the user device 100.
  • three base stations 201, 202, 203 are illustrated as an example, but in general, a large number of base stations 200 are arranged to cover the service area of the wireless communication system 10.
  • the base station may be called, for example, "gNB".
  • both UL and DL may be OFDMA similar to DL of existing LTE, and UL / DL is the same as that of existing LTE.
  • SC-FDMA / OFDMA similar to UL / DL may be used, or other signal waveforms may be used.
  • the base stations are connected by a communication line (referred to as a backhaul), and information can be transmitted and received between the base stations using, for example, an X2 interface.
  • the base stations are synchronized.
  • base stations may be asynchronous. In the case of non-synchronization, for example, time shift information is exchanged between base stations, and substantially synchronous operation is possible.
  • UL communication and DL communication are performed by several UL / DL patterns. However, it is not limited to these.
  • time interval here is the width of one square frame in FIG. 3A (the same applies to B and C) (the width described as “E. g., Subframe, slot or Mini-slot”. ). This "time interval” may be referred to as TTI.
  • the UL / DL transmission direction is fixedly set in a part of time intervals, and only the set communication direction is permitted in the relevant time intervals.
  • a partial time interval and a section within the time interval (in the illustrated example, the sections at both ends within the time interval are fixedly set to DL and UL)
  • UL / DL is fixedly set, and only the set transmission direction is permitted in the relevant time interval.
  • UL communication / DL communication is possible at other time intervals.
  • FIG. 4 is a diagram showing the frame configuration according to the pattern 3 shown in FIG. 3C in more detail.
  • the above-mentioned "time interval" is called a slot.
  • the slots used in the following may be replaced with TTI (transmission time interval), unit time frame, subframe, minislot.
  • TTI transmission time interval
  • the slot time length may be a fixed time length that does not change with the passage of time, or may be a time length that changes with packet size or the like.
  • one slot has a leading time interval (DL control channel interval) for the downlink control channel, a time interval for data communication (data interval), and an uplink control channel. It may have a last time interval (UL control channel interval).
  • DL control channel interval leading time interval
  • data interval time interval for data communication
  • UL control channel interval last time interval
  • GP guard period
  • UL control CH may be transmitted in a short time (eg, 1 symbol). Such a short time UL control CH is called Short PUCCH.
  • the UE-to-UE interference assumed in the present embodiment will be described with reference to FIG.
  • the cell of the base station 201 and the cell of the base station 203 are victim cells, and the cell of the base station 202 is an aggressor cell.
  • the UL signal from the user device 102 of the aggressor cell is an interference with the user devices 101 and 103 of the victim cell.
  • This interference is an example of DL and UL cross-link interference, and its influence is large, for example, the UL data channel becomes interference to the DL control channel of the victim cell.
  • the effect becomes large.
  • an area where the distance between the user devices is short is regarded as a cluster, and UE-to-UE interference measurement is performed in the cluster. , And UE-to-UE interference reduction control may be performed.
  • a time / frequency resource for interference measurement (hereinafter, IMR (Interference Measurement Resource)) is set, and the user apparatus 100 of a certain cell is a multiple user apparatus of another cell (one or more).
  • IMR Interference Measurement Resource
  • the user apparatus 100 of a certain cell is a multiple user apparatus of another cell (one or more).
  • Measure the aggregated (aggregated) crosslink interference level eg, RSSI (Received Signal Strength Indicator)
  • RSSI Receiveived Signal Strength Indicator
  • the RSSI is an example, and another quantity (eg, RSRP) may be measured.
  • an IMR is set in the user apparatus 101 of the aggressor cell, and the user apparatus 101 receives the received power of the signal transmitted from the user apparatus 102 (including multiple user apparatuses) in the IMR (e.g. Measure the RSSI) of The user apparatus 101 transmits the measurement result to the base station 201.
  • the base station 201 adjusts the communication direction in the own cell in order to reduce interference, for example, when it is understood that the interference from the aggressor cell of the base station 202 is large based on the measurement result received from the user apparatus 101. Do. Alternatively, the measurement result is transmitted to the base station 202 of the aggressor cell, and the base station 202 of the aggressor cell is caused to adjust the transmission direction.
  • FIG. 6 is a diagram for describing a basic operation example between the base station 200 and the user apparatus 100 located in the cell (serving cell) of the base station 200.
  • the base station 200 transmits setting information to the user apparatus 100.
  • the setting information includes, for example, information specifying an IMR (example: resource position, resource size, cycle, etc.), a method of reporting measurement results (report cycle, time offset, etc.), an IM (Interference measurement) process described later Configuration information (e.g., information for specifying an IMR), or any one or any plurality or all of them.
  • Transmission of configuration information is performed using any one or more of broadcast information (system information), UE dedicated RRC signaling (for example, non-patent document 1), MAC CE, and PDCCH.
  • system information system information
  • UE dedicated RRC signaling for example, non-patent document 1
  • MAC CE for example, MAC CE
  • PDCCH Physical Downlink Control Channel
  • the user apparatus 100 measures the received power in the IMR.
  • the user apparatus 100 reports the measurement result to the base station 200 in S103.
  • CL-RSSI cross link RSSI
  • the CL-RSSI is, for example, “total received power (W) observed by the user equipment from all interference sources in different transmission directions only at the set measurement resource in the measurement bandwidth across N resource blocks. Linear average of the total received power (in [W]) observed only in the configured measurement resource and in the measurement bandwidth over N number of resource blocks, by the UE from all interfering sources with different transmission direction. It is defined as).
  • Example 1 Specific measurement methods will be described as Examples 1 and 2, and an example related to a method of reporting measurement results will be described as Example 3.
  • Example 1 In the first embodiment, it is assumed that the user apparatus 101 shown in FIG. 5 performs measurement as an example. Also, as an example, it is assumed that the assumed UL interference source is the cell 2 (the cell in which the user apparatus 102 is present) illustrated in FIG.
  • FIG. 7A shows an example of the IMR set in the user apparatus 101 in the embodiment 1-1.
  • two resource elements (2 OFDM symbols ⁇ 1 subcarrier) in a data area in a slot (measurement slot) in which DL is set are set as an IMR.
  • UL is set in the data area of the slot (measured slot) in the cell 2 corresponding to the Measurement slot, and there is a possibility that a plurality of user apparatuses may perform UL data communication (PUSCH / DMRS) in the data area. .
  • PUSCH / DMRS UL data communication
  • the base station 201 of the serving cell of the user apparatus 101 is notified of the information of UL / DL configuration from the base station 202 of the cell 2, and the base station 201 illustrated resources in the slot set to UL in the cell 2.
  • the information on the IMR corresponding to the measurement is set in the user apparatus 101.
  • the IMR shown in FIG. 7A is an example in which the resources of ZP CSI-RS defined in LTE are applied.
  • IMRs are set on CSI-RS candidate positions.
  • the type of resource element of IMR in the resource block is the same as that of CSI-RS, and as shown in FIG. 7A, the frequency direction is one subcarrier and the time direction is two OFDM symbols.
  • the IMR may be configured differently to the resources of the ZP CSI-RS.
  • the base station 201 can set the IMR to any resource to which PUSCH / DMRS can be transmitted in a neighbor cell (neighbor cell).
  • the resource size of the IMR is arbitrary (flexible). For example, as the IMR, a resource in which the frequency direction is one subcarrier and the time direction is an OFDM symbol larger than 2 may be set. Also, as the IMR, a resource in which the frequency direction is a plurality of subcarriers and the time direction is one OFDM symbol may be set.
  • Example 1-1 when the data communication of UL is actually performed in the cell 2, the reception power measured by the user apparatus 101 by the IMR becomes large.
  • Example 1-1 shows an example in which a part of uplink transmission resources such as PUSCH is set to non-transmission in one cell (Cell # b) among a plurality of neighboring cells of the base station 201 (FIG. 8 (c)).
  • part of the PUSCH transmission resource is not transmitted by higher layer signaling or L1 / L2 signaling (PDCCH or the like), and Rate matching is applied.
  • the setting may be in units of cells or in units of UEs.
  • the presence or absence of uplink transmission can be switched by the cell or user apparatus for a certain measurement target resource, so by setting a plurality of IM processes (or IMRs) described later.
  • the base station 201 may notify another base station of no transmission setting of uplink transmission resource by backhaul signaling. A plurality of non-transmission setting information may be notified. Also, the base station 201 performs measurement setting based on non-transmission setting information received from another base station, or notifies an appropriate base station of an interference level based on the measurement result reported from the user apparatus. It can be done.
  • Example 1-2 An example of the IMR set to the user apparatus 101 in the embodiment 1-2 is shown in FIG. 9 (a).
  • the IMR is set in the resource in which the SRS is set in the cell 2.
  • IMR is set to the symbol in which transmission of SRS is performed from the user apparatus of the cell 2.
  • the base station 201 of the serving cell of the user apparatus 101 is notified of the SRS configuration information from the base station 202 of the cell 2, and the base station 201 uses the resource to which the SRS is transmitted in the cell 2 as the IMR.
  • the IMR may be set, for example, to overlap with Comb (the comb tooth-like frequency resource to which SRS is transmitted) in SRS setting in cell 2, or the frequency in the symbol in which SRS is transmitted. It may be set to the whole (example in FIG. 9A).
  • Example 1-2 even when UL data communication is not performed in the cell 2 very much, the reception power measured by the IMR becomes large.
  • Option 1 the base station 201 sets the IMR to cell specific for the subordinate user apparatuses.
  • GC Group-common
  • RRC Radio Resource Control
  • the same IMR is configured for all user devices in the cell.
  • Option 1 has the advantage of very low IMR overhead.
  • Option 2 the base station 201 sets the IMR to UE specific for the subordinate user equipment.
  • RRC signaling is used.
  • option 2 in order to reduce overhead, for example, the number of user equipments performing inter-user equipment measurements may be limited.
  • whether to perform inter-user apparatus measurement is set from the base station 201 for the user apparatus.
  • the execution requirement of the inter-user-device measurement is set for a user device whose DL RSRP (DL RSRP reported from the user device to the base station 201) is smaller than a threshold. The reason is that when DL RSRP is small, it is susceptible to cross link interference.
  • the first embodiment enables the user apparatus 100 to appropriately measure interference from neighboring cells.
  • Example 2 Next, Example 2 will be described. Also in the second embodiment, as an example, it is assumed that the user device 101 shown in FIG. 5 performs the measurement.
  • an Interference Measurement process (hereinafter, an IM process) is defined.
  • the interference measurement process may be referred to as a measurement process.
  • the IM process is an IMR in the case of assuming a specific interference situation from a plurality of neighboring cells. Such an IM process setup makes it possible to measure different assumed crosslink interferences due to dynamic DL / DL changes. A specific example will be described later.
  • a plurality of IM processes are set in the user apparatus 101 from the base station 201.
  • the user device 101 measures received power (RSSI) at IMRs in multiple IM processes.
  • RSSI received power
  • the IMR is different between different IM processes.
  • the IMRs between different IM processes may be identical or may partially overlap.
  • the non-transmission cell and its resource information described above in the setting in the IM process may be included.
  • the setting of the IMR in an IM process is a setting that can measure interference in the hypothesis of UL transmission (crosslink interference) in neighboring cells corresponding to the IM process.
  • FIG. 10 is a diagram for explaining an example of the IMR process.
  • Cell 1 to cell 3 on the horizontal axis of FIG. 10 are, for example, cell 1 to cell 3 in the cluster shown in FIG. A to G on the vertical axis of FIG. 10 indicate IMR.
  • each row in FIG. 10 shows the assumption of UL transmission of each cell at the same time (eg, a certain slot).
  • One row IMR and corresponding UL transmission assumption for each cell
  • IMR in one row may be considered as one IM process.
  • the IMR in FIG. 10 indicates that cell 1 is “ZP CSI-RS” means that there is no UL transmission of cell 1 in IMR-B.
  • the fact that cell 2 is “PUSCH / DMRS / SRS” means that it is assumed that there is UL transmission (PUSCH or DMRS or SRS) of cell 2 in IMR-B, and cell 3 is “PUSCH / DMRS “/ SRS” indicates that it is assumed that there is UL transmission (PUSCH or DMRS or SRS) of cell 3 in IMR-B.
  • the base station 201 of the cell 1 (the cell of the base station 201 in FIG. 5) sets IMR-A, B, C, D for the user apparatus 101, and the user apparatus 101 performs IMR-A, B , C and D respectively.
  • the IM process corresponding to IMR-A is IM process A
  • the IM process corresponding to IMR-B is IM process B
  • the IM process corresponding to IMR-C is IM process C
  • IMR-D is compatible.
  • “set IMR-A, B, C, D” may be considered as synonymous with “set IM process A, B, C, D”.
  • the user device 101 obtains the following measurement results as an example.
  • the base station 202 of the cell 2 sets IMR-A, C, E, F for the user apparatus 102.
  • the base station 203 of the cell 3 sets IMR-A, D, E, and G for the user apparatus 103.
  • the base station of each cell can create the information of the table shown in FIG. 10 by exchanging, for example, UL / DL configuration information with the base station of the neighboring cell. Further, since the status of UL transmission / non-transmission of each cell corresponding to each IMR changes with the passage of time, the assumed contents shown in FIG. 10 may change with the passage of time.
  • Each base station may, for example, set an IM process based on the assumption of UL transmission of each cell after change to a subordinate user apparatus at predetermined time intervals.
  • the user apparatus 100 can appropriately grasp crosslink interference from neighboring cells by using the IMR according to the situation of crosslink interference from neighboring cells.
  • Example 3 In the third embodiment, as described in the second embodiment, an example of a method of measurement report (measurement report) performed by the user device 101 when a plurality of IM processes are set in the user device 101 will be described. Examples 3-1 to 3-4 will be described below. In the following description, an example in which the user apparatus 101 mainly performs reporting will be described.
  • Example 3-1 the user apparatus 101 separately reports the measurement results of a plurality of IM processes (or one IM process) set in the user apparatus 101 to the base station 201 separately for each IM process.
  • the base station 201 performs, for example, transmission direction adjustment for cross link interference reduction, based on the measurement result reported from the user apparatus 101 (and other user apparatuses).
  • the user apparatus 101 reports, to the base station 201, measurement results of all IM processes in a plurality of IM processes set in the user apparatus 101.
  • the base station 201 can determine the cross link interference situation based on the measurement report.
  • base station 201 performs UL transmission in cell 3 Although it is assumed, the resulting crosslink interference is small, so it can be determined not to adjust the transmission direction.
  • base station 201 when the measurement result (received power) in the process of IMR-D is large (for example, larger than predetermined threshold B), base station 201 is caused by UL transmission in cell 2. It can be determined that the adjustment of the transmission direction is to be performed because the crosslink interference to be performed is large. In this example, for example, the base station 201 can perform adjustment to align the transmission direction with the cell 2 in the corresponding slot.
  • the user apparatus 101 may report the measurement results of some IM processes (one or more IM processes) among the plurality of IM processes set in the user apparatus 101 to the base station 201. .
  • the user apparatus 101 transmits, to the base station 201, a measurement result larger than a predetermined threshold C among measurement results in a plurality of IM processes set in the user apparatus 101.
  • the measurement result not larger than the predetermined threshold C is not reported to the base station 201.
  • the base station 201 can determine the content of the crosslink interference based on the reported measurement result under the assumption of the corresponding IM process.
  • the base station 201 can determine that there is no crosslink interference from the cell under the assumption of the corresponding IM process with respect to the measurement result that has not received the report. For example, in the case shown in FIG. 10, when the base station 201 does not receive the measurement result of the IM process of IMR-C from the user apparatus 101, the base station 201 assumes UL transmission in the cell 3, but It can be determined that crosslink interference is small.
  • Example 3-2 the user apparatus 101 jointly reports the measurement result of the IM process and the DL measurement result set in the user apparatus 101 to the base station 201.
  • the user apparatus 101 performs measurement of an IM process (that is, measurement using IMR) and measurement of DL.
  • the measurement method of DL although not limited to a particular method, for example, the DL reception power of the serving cell is measured in a slot where IMR is configured.
  • the received power of DL may be RSSI or RSRP.
  • the IMR shown in FIG. 7A when the IMR shown in FIG. 7A is set, measurement is performed using a predetermined DL resource (for example, a resource of a DL reference signal of a serving cell) of a slot in which the IMR is set.
  • a predetermined DL resource for example, a resource of a DL reference signal of a serving cell
  • the IM process may include the measurement of IMR and the measurement of DL.
  • the base station 201 that receives the measurement results of the multiple IM process and the DL measurement together collectively has, for example, a DL for the user apparatus in its own cell in a slot with large DL reception power and large interference. Adjustments can be made to avoid scheduling. Further, inter-base station adjustment similar to that of the embodiment 3-1 can also be performed.
  • Variations of the reporting method are the same as in Example 3-1. That is, for example, the user apparatus 101 reports, to the base station 201, the integrated measurement results (measurement results of IMR and DL measurement results) of all IM processes in a plurality of IM processes set in the user apparatus 101.
  • the base station 201 can determine the cross link interference situation based on the comprehensive measurement report.
  • the user apparatus 101 reports, to the base station 201, an overall measurement result of part of IM processes (one or more IM processes) in the plurality of IM processes set in the user apparatus 101. It is also good.
  • the user apparatus 101 transmits, to the base station 201, an overall measurement result having an IMR measurement result larger than a predetermined threshold D among the overall measurement results in the plurality of IM processes set in the user apparatus 101.
  • the user apparatus 101 may measure the IM process (that is, measurement using the IMR) and perform interference measurement of the DL and report these.
  • the DL interference measurement method is not limited to a particular method, but for example, it is assumed that DL communication in another cell is performed in the slot (or some other slot) in which IMR is set (eg: A DL data resource of another cell or a resource of a DL reference signal is set as a DL measurement resource (eg, a resource similar to ZP CSI RS), and the reception power is measured by the DL measurement resource.
  • the received power here may be RSSI or RSRP.
  • the IM process may include IMR measurement and DL interference measurement.
  • the base station 201 that receives the measurement results of multiple IM processes and the DL interference measurement together collectively, for example, performs DL scheduling for user apparatuses in its own cell or other cells in a slot with large interference. Can be implemented to avoid Further, inter-base station adjustment similar to that of the embodiment 3-1 can also be performed.
  • Variations of the reporting method are the same as in Example 3-1. That is, for example, the user apparatus 101 reports, to the base station 201, the integrated measurement results (measurement results of IMR and DL interference measurement results) of all IM processes in a plurality of IM processes set in the user apparatus 101.
  • the base station 201 can determine the interference status based on the comprehensive measurement report.
  • the user apparatus 101 may report, to the base station 201, an integrated measurement result of part of IM processes (one or more IM processes) among a plurality of IM processes set in the user apparatus 101.
  • the user apparatus 101 is an integrated measurement in which the sum (or an average) of the IMR measurement result and the DL interference measurement result among the integrated measurement results in the plurality of IM processes set in the user apparatus 101 is larger than a predetermined threshold E. The result is sent to the base station 201.
  • Example 3-3 In the description of Example 3-3 and Example 3-4 below, the description “IM process / IMR” may apply the process to the IM process described in Example 2, and will be described in Example 1. Indicates that it may be applied to the IMR.
  • the IMR described in the first embodiment may be interpreted as "IM process”.
  • the user apparatus 101 may select a subset of IM processes / IMRs set from the base station 201 to perform measurement and reporting.
  • the N IM processes are, for example, IM processes on all neighboring cells (nearby base stations) that can cooperate with the base station 201.
  • M may be a predetermined value, a value signaled in the upper layer, or a value determined based on UE capability.
  • the measurement and the report from the user apparatus 101 do not need to be concerned with DL measurement / measurement between UEs.
  • the configuration from the base station 201 may not be UE specific but UE group common or Cell specific. Each user device can select a subset according to their capabilities.
  • the base station 201 can easily operate since it can set IM processes corresponding to all cooperable peripheral cells without considering the interference level and / or the UE capability. In addition, since it becomes possible to notify the setting from the base station 201 by broadcast information or the like, the signaling overhead can be reduced.
  • the user apparatus 101 may report the ID of the IM process of the selected subset along with the measurement result.
  • the user apparatus 101 may report, to the base station 201, the ID of the IM process of the selected subset separately from the measurement result.
  • the base station 201 that has received the report may request the user apparatus 101 to report measurement results for IM processes / IMRs not included in the subset selected by the user apparatus 101.
  • the user apparatus 101 may report a result indicating unmeasured or low interference to the base station 201.
  • the recognition of the subset can be coordinated between the user apparatus and the base station. Also, robust operation can be performed without the base station having to recognize the selected subset.
  • the user apparatus 101 may determine the subset based on the detection result or measurement result of DL.
  • the user apparatus 101 may determine the subset based on any one or more of a measurement result of a neighboring cell, a cell ID of a detected neighboring cell, a detected beam ID, and broadcast information. it can.
  • IM process / IMR set from the base station 201 to the user apparatus 101
  • one or more corresponding cell IDs and / or beam IDs and / or thresholds for reporting are set, and the user apparatus 101 , IM process / IMR, measure and report only when the set conditions are met.
  • the user apparatus 101 measures the IM process / IMR included in the subset, and uses the detection of the event that satisfies the above conditions as a trigger to measure the IM process / IMR corresponding to the condition as the base station 201. You may report to
  • the target of measurement / report can be limited to a specific one. Overhead ⁇ Complexity can be lowered.
  • the time range of the measurement of the IM process / IMR performed by the user apparatus 101 may be determined based on the setting of the report in an IM process / IMR.
  • the time range to be measured may be determined according to the time for making a report and / or the time for receiving a request for a report.
  • the user apparatus 101 periodically reporting a measurement result of an IM process / IMR based on the setting from the base station 201 (e.g., report in the Kth slot every 20 ms) is the user apparatus 101.
  • the user apparatus 101 measures the measurement using the IM process / IMR in a time range of M subframes from the (K + 1) th subframe (referred to as measurement 1), and the next M
  • the measurement (measurement 2) is also performed in the time range of the number of subframes. For example, in each of these time ranges, the measurement based on the periodically arriving IMR is performed a plurality of times, and the average is a measurement result.
  • the measurement result of measurement 1 and the measurement result of measurement 2 are reported.
  • the measurement at the measurement time of measurement 1 corresponds to the assumption of IMR-B
  • the measurement at the measurement time of measurement 2 corresponds to the assumption of IMR-C.
  • the user apparatus 101 receives from the base station 201 a report request of measurement results of a certain IM process / IMR at each of time points A, B, C, and D. .
  • the measurement time range is from the time of receiving the report request (A) to the time of receiving the next report request (B), and the measurement results measured in this measurement time range are reported from the report request (B) , To the base station 201 before receiving the next report request (C).
  • the measurement in A to B shown in FIG. 11 corresponds to the IMR-B assumption
  • the measurement in B to C corresponds to the IMR-C assumption
  • C-D may correspond to the IMR-D assumption. That is, using one IM process / IMR, measurements based on multiple types of assumptions can be performed in a time-division manner, enabling efficient measurement.
  • a report period is set, and in each report period, the measurement result measured in the previous report period is reported. You may do it.
  • the correspondence between the time range for performing measurement and the reporting time / reporting request is set, for example, in the upper layer (eg, setting by RRC signaling from the base station 201). Further, as shown in FIG. 12, when the user apparatus 101 receives a report request (Reporting request) from the base station 201, the user apparatus 101 can receive a report request in the latest measurement period in the past compared to when the report request is received. The measurement results may be reported.
  • a report request Reporting request
  • Example 3-4 by defining the time range of measurement / average in one IM process / IMR (that is, without changing the resources and sequences to be measured), it is possible to effectively single out a large number of measurements. It becomes possible to implement one IM process / IMR.
  • Example 1 In addition, you may implement combining any two of Example 1, Example 2, and Example 3, and you may implement combining all.
  • Each of user apparatus 100 and the base station 200 has all the functions described in the present embodiment. However, each of the user apparatus 100 and the base station 200 may be provided with a part of all the functions described in the present embodiment. For example, each of the user apparatus 100 and the base station 200 may have all the functions of the function of performing the first embodiment, the function of performing the second embodiment, and the function of performing the third embodiment; Any one or more of them or any one of the functions may be provided.
  • FIG. 13 is a diagram showing an example of a functional configuration of the user apparatus 100.
  • the user apparatus 100 includes a signal transmission unit 110, a signal reception unit 120, and a setting information management unit 130.
  • the signal receiving unit 120 includes a measuring unit 140.
  • the measuring unit 140 may be provided outside the signal receiving unit 120.
  • the functional configuration shown in FIG. 13 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the functional unit may be arbitrary.
  • the signal transmission unit 110 is configured to generate a signal of the lower layer from the information of the upper layer, and wirelessly transmit the signal.
  • the signal receiving unit 120 is configured to wirelessly receive various signals and acquire information of the upper layer from the received signals.
  • the measurement unit 140 measures (calculates) received power (eg, RSSI, RSRP).
  • the setting information management unit 130 has a storage unit that stores setting information set in advance and setting information dynamically and / or semi-statically transmitted from the base station 200 or the like.
  • the setting information management unit 130 holds setting information of a plurality of measurement processes usable for interference measurement, and the measurement unit 140 measures measurement resources of all or part of the plurality of measurement processes.
  • the signal transmission unit 110 reports all or part of the measurement result by the measurement unit 140 to the base station. For example, among the measurement results by the measurement unit 140, the signal transmission unit 110 reports a measurement result larger than a predetermined threshold to the base station.
  • the measurement unit 140 selects one or more measurement processes as a subset from the plurality of measurement processes set by the setting information, and performs measurement using the measurement resource of the measurement process of the subset. I do.
  • the measurement unit 140 may determine the subset based on detection results of neighboring cells or measurement results of neighboring cells. Also, for example, the measurement unit 140 determines a time range in which measurement is to be performed, based on the time of reporting of the measurement result by the signal transmission unit.
  • FIG. 14 is a diagram showing an example of a functional configuration of the base station 200.
  • the base station 200 includes a signal transmission unit 210, a signal reception unit 220, a scheduling unit 230, a setting information management unit 240, and an NW communication unit 250.
  • the functional configuration shown in FIG. 14 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the functional unit may be arbitrary.
  • the signal transmission unit 210 is configured to generate a signal of the lower layer from the information of the upper layer and wirelessly transmit the signal.
  • the signal reception unit 220 is configured to wirelessly receive various signals and acquire information of the upper layer from the received signals.
  • the scheduling unit 230 performs resource assignment to the user apparatus 100 and the like. For example, based on the measurement result from the user apparatus 100 received by the signal receiving unit 220, the scheduling unit 230 performs scheduling to avoid interference.
  • the scheduling unit 230 can also perform non-transmission scheduling as shown in FIG. 8C.
  • the setting information management unit 240 includes a storage unit, stores the preset setting information, and has a function of determining and holding the setting information to be set to the user apparatus 100 dynamically and / or semi-statically.
  • the NW communication unit 250 transmits and receives, for example, UL / DL configuration information, cross link interference information, setting information of reference signals, and the like with other base stations.
  • each functional block may be realized by one device physically and / or logically connected to a plurality of elements, or directly and two or more physically and / or logically separated devices. And / or indirectly (for example, wired and / or wirelessly) connected, and may be realized by the plurality of devices.
  • both the user apparatus 100 and the base station 200 in the embodiment of the present invention may function as a computer that performs the process according to the present embodiment.
  • FIG. 15 is a diagram showing an example of a hardware configuration of user apparatus 100 and base station 200 according to the present embodiment.
  • Each of the above-described user device 100 and base station 200 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. Good.
  • the term “device” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the user apparatus 100 and the base station 200 may be configured to include one or more of the devices indicated by 1001 to 1006 shown in the figure, or may be configured without including some devices. May be
  • Each function in the user apparatus 100 and the base station 200 causes the processor 1001 to perform an operation by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the communication by the communication apparatus 1004, the memory 1002 And by controlling the reading and / or writing of data in the storage 1003.
  • the processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these.
  • a program a program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
  • the signal transmission unit 110, the signal reception unit 120, the setting information management unit 130, and the measurement unit 140 of the user apparatus 100 illustrated in FIG. 13 may be realized by a control program stored in the memory 1002 and operated by the processor 1001. Good.
  • control program operating at 1001.
  • the various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device) or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to execute the process according to the embodiment of the present invention.
  • the storage 1003 is a computer readable recording medium, and for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used.
  • the storage 1003 may be called an auxiliary storage device.
  • the above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the signal transmission unit 110 and the signal reception unit 120 of the user apparatus 100 may be realized by the communication apparatus 1004.
  • the signal transmission unit 210 and the signal reception unit 220 of the base station 200 may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured by a single bus or may be configured by different buses among the devices.
  • the user apparatus 100 and the base station 200 each include a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FPGA), etc. It may be configured to include hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • a setting information management unit that holds setting information of a plurality of measurement processes that can be used for interference measurement, which is a user apparatus in a wireless communication system;
  • a measurement unit that performs measurement using measurement resources of all or part of the measurement processes in the measurement process, and a signal transmission unit that reports all or a part of the measurement results by the measurement unit to the base station;
  • a user device is provided, characterized in that it comprises. This configuration enables the user device to appropriately perform inter-user device measurement and measurement result reporting.
  • the signal transmission unit may report only the measurement result larger than a predetermined threshold to the base station among the measurement results by the measurement unit. With this configuration, overhead can be reduced, and the base station can obtain measurement results necessary for interference coordination reduction processing and the like.
  • the user equipment according to claim 1 characterized in that:
  • the measurement unit may select one or more measurement processes as a subset from the plurality of measurement processes set by the setting information, and may perform measurement using measurement resources of the measurement process of the subset. Good. This configuration can reduce signaling overhead because the base station can set a common measurement process for user apparatuses in a cell without considering the capabilities of individual user apparatuses and the like.
  • the measurement unit may determine the subset based on detection results of neighboring cells or measurement results of neighboring cells. This configuration enables the measurement to be performed using a measurement process that requires measurement.
  • the measurement unit may determine a time range in which the measurement is performed based on a time of reporting of the measurement result by the signal transmission unit. According to this configuration, it is possible to measure substantially a plurality of measurement processes in one measurement process.
  • the operations of multiple functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by multiple components.
  • the order of processing may be changed as long as there is no contradiction.
  • the user apparatus 100 and the base station 200 have been described using functional block diagrams for the convenience of the processing description, such an apparatus may be realized in hardware, software or a combination thereof.
  • the software operated by the processor of the user apparatus 100 according to the embodiment of the present invention and the software operated by the processor of the base station 200 according to the embodiment of the present invention are random access memory (RAM), flash memory, read only It may be stored in memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • notification of information is not limited to the aspect / embodiment described herein, and may be performed by other methods.
  • notification of information may be physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • Each aspect / embodiment described in the present specification is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide Band),
  • the present invention may be applied to a system utilizing Bluetooth (registered trademark), other appropriate systems, and / or an advanced next-generation system based on these.
  • the specific operation supposed to be performed by the base station 200 in this specification may be performed by the upper node in some cases.
  • various operations performed for communication with the user equipment 100 may be performed by the base station 200 and / or other than the base station 200. It is clear that it may be done by a network node (for example but not limited to MME or S-GW etc).
  • a network node for example but not limited to MME or S-GW etc.
  • MME Mobility Management Entity
  • the user equipment 100 may be a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, by those skilled in the art. It may also be called a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.
  • Base station 200 may also be referred to by those skilled in the art in terms of NB (Node B), eNB (enhanced Node B), Base Station, or some other suitable terminology.
  • NB Node B
  • eNB enhanced Node B
  • Base Station or some other suitable terminology.
  • determining may encompass a wide variety of operations.
  • “Judgment”, “decision” are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision”, etc.
  • “determination” and “determination” are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (Accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”.
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • 100 user apparatus 110 signal transmitting unit 120 signal receiving unit 130 setting information managing unit 140 measuring unit 200 base station 210 signal transmitting unit 220 signal receiving unit 230 scheduling unit 240 setting information managing unit 250 NW communication unit 1001 processor 1002 memory 1003 storage 1004 communication Device 1005 Input Device 1006 Output Device

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

Abstract

L'invention concerne un dispositif utilisateur faisant partie d'un système de communication sans fil et comprenant : une unité de gestion d'informations de réglage contenant des informations de réglage pour une pluralité de processus de mesure pouvant servir à mesurer des interférences ; une unité de mesure qui effectue une mesure au moyen de ressources de mesure pour une partie ou la totalité des processus de mesure ; et une unité de transmission de signaux qui rapporte à une station de base une partie ou la totalité des résultats de mesure obtenus par l'unité de mesure.
PCT/JP2017/029229 2017-08-10 2017-08-10 Dispositif utilisateur et procédé de mesure WO2019030934A1 (fr)

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WO2021183612A1 (fr) * 2020-03-13 2021-09-16 Qualcomm Incorporated Mesure d'interférence de liaison croisée

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JP2012525022A (ja) * 2009-04-27 2012-10-18 パナソニック株式会社 無線通信システムにおいて参照信号を設置する方法およびシステム
WO2014181446A1 (fr) * 2013-05-09 2014-11-13 富士通株式会社 Système de communication, dispositif de commande et procédé de commande
WO2014192632A1 (fr) * 2013-05-29 2014-12-04 京セラ株式会社 Station de base, terminal utilisateur et processeur
JP2016532365A (ja) * 2013-07-29 2016-10-13 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおいてＮＩＢ ＣｏＭＰ方法及び装置

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JP2012525022A (ja) * 2009-04-27 2012-10-18 パナソニック株式会社 無線通信システムにおいて参照信号を設置する方法およびシステム
WO2014181446A1 (fr) * 2013-05-09 2014-11-13 富士通株式会社 Système de communication, dispositif de commande et procédé de commande
WO2014192632A1 (fr) * 2013-05-29 2014-12-04 京セラ株式会社 Station de base, terminal utilisateur et processeur
JP2016532365A (ja) * 2013-07-29 2016-10-13 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおいてＮＩＢ ＣｏＭＰ方法及び装置

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Publication number Priority date Publication date Assignee Title
WO2021183612A1 (fr) * 2020-03-13 2021-09-16 Qualcomm Incorporated Mesure d'interférence de liaison croisée
US11689945B2 (en) 2020-03-13 2023-06-27 Qualcomm Incorporated Measuring cross link interference

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