WO2013048030A2 - 무선 통신 시스템에서 간섭을 측정하는 방법 및 장치 - Google Patents
무선 통신 시스템에서 간섭을 측정하는 방법 및 장치 Download PDFInfo
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- WO2013048030A2 WO2013048030A2 PCT/KR2012/007167 KR2012007167W WO2013048030A2 WO 2013048030 A2 WO2013048030 A2 WO 2013048030A2 KR 2012007167 W KR2012007167 W KR 2012007167W WO 2013048030 A2 WO2013048030 A2 WO 2013048030A2
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- configurations
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
Definitions
- the next generation multimedia wireless communication system which is being actively researched recently, requires a system capable of processing and transmitting various information such as video, wireless data, etc., out of an initial voice-oriented service.
- the fourth generation of wireless communication which is currently being developed after the third generation of wireless communication systems, aims to support high-speed data services of downlink 1 gigabits per second (Gbps) and uplink 500 megabits per second (Mbps).
- Gbps gigabits per second
- Mbps megabits per second
- the purpose of a wireless communication system is to enable a large number of users to communicate reliably regardless of location and mobility.
- a wireless channel is a path loss, noise, fading due to multipath, inter-symbol interference (ISI) or mobility of UE.
- ISI inter-symbol interference
- There are non-ideal characteristics such as the Doppler effect.
- Various techniques have been developed to overcome the non-ideal characteristics of the wireless channel and to improve the reliability of the wireless communication.
- each node in a wireless communication system in which each node cooperates with each other, each node is independent of a base station (BS), an advanced BS (ABS), a Node-B (NB), an eNode-B (eNB), and an access point (AP). It has much better performance than wireless communication systems operating on the back.
- BS base station
- ABS advanced BS
- NB Node-B
- eNB eNode-B
- AP access point
- a distributed multi node system having a plurality of nodes in a cell may be applied.
- the multi-node system may include a distributed antenna system (DAS), a radio remote head (RRH), and the like.
- DAS distributed antenna system
- RRH radio remote head
- standardization work is underway to apply various MIMO (multiple-input multiple-output) and cooperative communication techniques to distributed multi-node systems.
- An object of the present invention is to provide a method and apparatus for measuring interference in a wireless communication system.
- the present invention provides a method for measuring interference based on zero-power channel state information (CSI) reference signal (RS) configuration in a distributed multi-node system.
- CSI channel state information
- RS reference signal
- a method of measuring interference by a user equipment (UE) in a wireless communication system receives from a base station a plurality of CSI RS configurations belonging to a first set of channel state information (CSI) reference signals through a plurality of nodes of a base station corresponding to the first CSI set, Receive a zero-power CSI RS configuration through a plurality of nodes of a base station corresponding to the first CSI set, and perform interference on the first CSI RS set based on the first zero power CSI RS configuration. It includes measuring.
- CSI channel state information
- the plurality of CSI RS configurations belonging to the first CSI RS set may be CSI RS configurations monitored by the terminal.
- the method may further comprise measuring interference for a second set of CSI RSs comprising a plurality of CSI RS configurations at which the terminal transmits or receives data.
- a terminal for measuring interference in a wireless communication system includes a radio frequency (RF) unit for transmitting or receiving a radio signal, and a processor connected to the RF unit, wherein the processor belongs to a first set of channel state information (CSI) reference signals (RS) from a base station.
- CSI channel state information
- Interference can be efficiently measured in distributed multi-node systems.
- 1 is a wireless communication system.
- FIG. 2 shows a structure of a radio frame in 3GPP LTE.
- FIG 3 shows an example of a resource grid for one downlink slot.
- FIG. 6 shows an example of a multi-node system.
- FIG. 11 shows an example of an RB to which a CSI RS is mapped.
- the wireless communication system may be any one of a multiple-input multiple-output (MIMO) system, a multiple-input single-output (MIS) system, a single-input single-output (SISO) system, and a single-input multiple-output (SIMO) system.
- MIMO multiple-input multiple-output
- MIS multiple-input single-output
- SISO single-input single-output
- SIMO single-input multiple-output
- the MIMO system uses a plurality of transmit antennas and a plurality of receive antennas.
- the MISO system uses multiple transmit antennas and one receive antenna.
- the SISO system uses one transmit antenna and one receive antenna.
- the SIMO system uses one transmit antenna and multiple receive antennas.
- the transmit antenna means a physical or logical antenna used to transmit one signal or stream
- the receive antenna means a physical or logical antenna used to receive one signal or stream.
- the downlink slot includes a plurality of OFDM symbols in the time domain and N RB resource blocks in the frequency domain.
- the number N RB of resource blocks included in the downlink slot depends on the downlink transmission bandwidth set in the cell. For example, in the LTE system, N RB may be any one of 6 to 110.
- One resource block includes a plurality of subcarriers in the frequency domain.
- the structure of the uplink slot may also be the same as that of the downlink slot.
- an exemplary resource block includes 7 ⁇ 12 resource elements including 7 OFDM symbols in the time domain and 12 subcarriers in the frequency domain, but the number of OFDM symbols and the number of subcarriers in the resource block is equal to this. It is not limited. The number of OFDM symbols and the number of subcarriers can be variously changed according to the length of the CP, frequency spacing, and the like. For example, the number of OFDM symbols is 7 for a normal CP and the number of OFDM symbols is 6 for an extended CP. The number of subcarriers in one OFDM symbol may be selected and used among 128, 256, 512, 1024, 1536 and 2048.
- the PDCCH includes resource allocation and transmission format of downlink-shared channel (DL-SCH), resource allocation information of uplink shared channel (UL-SCH), paging information on PCH, system information on DL-SCH, and random access transmitted on PDSCH. Resource allocation of higher layer control messages such as responses, sets of transmit power control commands for individual UEs in any UE group, activation of voice over internet protocol (VoIP), and the like.
- a plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
- the PDCCH is transmitted on an aggregation of one or several consecutive control channel elements (CCEs).
- CCEs control channel elements
- the base station determines the PDCCH format according to the DCI to be sent to the terminal, and attaches a cyclic redundancy check (CRC) to the control information.
- CRC cyclic redundancy check
- RNTI a unique radio network temporary identifier
- the PDCCH is for a specific terminal, a unique identifier of the terminal, for example, a cell-RNTI (C-RNTI) may be masked to the CRC.
- C-RNTI cell-RNTI
- a paging indication identifier for example, p-RNTI (P-RNTI) may be masked to the CRC.
- SI-RNTI system information-RNTI
- RA-RNTI random access-RNTI
- the uplink subframe may be divided into a control region and a data region in the frequency domain.
- the control region is allocated a physical uplink control channel (PUCCH) for transmitting uplink control information.
- the data region is allocated a physical uplink shared channel (PUSCH) for transmitting data.
- the terminal may support simultaneous transmission of the PUSCH and the PUCCH.
- the plurality of nodes 25-1, 25-2, 25-3, 25-4, and 25-5 may perform scheduling and handover (HO) of the terminal with individual cell IDs.
- the multi-node system 20 of FIG. 6 may be viewed as a multi-cell system.
- the base station 21 may be a macro cell, and each node may be a femto cell or a pico cell having cell coverage smaller than the cell coverage of the macro cell.
- a multi-tier network when a plurality of cells are overlayed and configured according to coverage, it may be referred to as a multi-tier network.
- FIG. 7 illustrates a case in which a base station uses one antenna port
- FIG. 8 illustrates a case in which a base station uses two antenna ports
- FIG. 9 illustrates a pattern in which a CRS is mapped to an RB when the base station uses four antenna ports.
- the CRS pattern may be used to support the features of LTE-A. For example, it can be used to support features such as coordinated multi-point (CoMP) transmission and reception techniques or spatial multiplexing.
- the CRS may be used for channel quality measurement, CP detection, time / frequency synchronization, and the like.
- the CRS is always transmitted by the number of antenna ports regardless of the number of streams.
- the CRS has an independent reference signal for each antenna port.
- the location of the frequency domain and the location of the time domain in the subframe of the CRS are determined regardless of the UE.
- the CRS sequence multiplied by the CRS is also generated regardless of the terminal. Therefore, all terminals in the cell can receive the CRS.
- the position and the CRS sequence in the subframe of the CRS may be determined according to the cell ID.
- the location in the time domain in the subframe of the CRS may be determined according to the number of the antenna port and the number of OFDM symbols in the resource block.
- the location of the frequency domain in the subframe of the CRS may be determined according to the number of the antenna, the cell ID, the OFDM symbol index l, the slot number in the radio frame, and the like.
- a two-dimensional CRS sequence may be generated as a product between symbols of a two-dimensional orthogonal sequence and a two-dimensional pseudo-random sequence. There may be three different two-dimensional orthogonal sequences and 170 different two-dimensional pseudo-random sequences. Each cell ID corresponds to a unique combination of one orthogonal sequence and one pseudorandom sequence.
- frequency hopping may be applied to the CRS.
- the frequency hopping pattern may be one radio frame (10 ms), and each frequency hopping pattern corresponds to one cell ID group.
- v represents the number of layers used for PDSCH transmission.
- DMRS is transmitted to one terminal on any one antenna port in the set S.
- DMRS exists and is valid for demodulation of PDSCH only when transmission of PDSCH is associated with the corresponding antenna port.
- DMRS is transmitted only in the RB to which the corresponding PDSCH is mapped.
- DMRS is not transmitted in a resource element in which either a physical channel or a physical signal is transmitted regardless of the antenna port.
- CSI RS is transmitted through one, two, four or eight antenna ports.
- CSI RS is described in 6.10 of 3rd Generation Partnership Project (3GPP) TS 36.211 V10.1.0 (2011-03) "Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation (Release 8)". See section .5.
- the CSI-RS-config IE includes a csi-RS IE indicating a CSI RS configuration for channel measurement.
- the antennaPortsCount parameter indicates the number of antenna ports used for transmission of the CSI RS.
- the resourceConfig parameter indicates a CSI RS configuration for channel measurement.
- the SubframeConfig parameter and the zeroTxPowerSubframeConfig parameter indicate the subframe configuration in which the CSI RS for channel measurement is transmitted.
- the terminal may transmit the CSI RS only in the downlink slot that satisfies the condition of n s mod 2 in Table 2 and Table 3.
- the UE is a subframe or paging message in which a special subframe of the TDD frame, transmission of the CSI RS collides with a synchronization signal, a physical broadcast channel (PBCH), and a system information block type 1 (SystemInformationBlockType1).
- PBCH physical broadcast channel
- SystemInformationBlockType1 SystemInformationBlockType1
- FIG. 11 shows an example of an RB to which a CSI RS is mapped.
- Rp represents a resource element used for CSI RS transmission on antenna port p.
- the CSI RS for the antenna ports 15 and 16 indicates a resource element corresponding to the third subcarrier (subcarrier index 2) of the sixth and seventh OFDM symbols (OFDM symbol indexes 5 and 6) of the first slot. Is sent through.
- the CSI RSs for the antenna ports 17 and 18 are transmitted through resource elements corresponding to the ninth subcarriers (subcarrier index 8) of the sixth and seventh OFDM symbols (OFDM symbol indexes 5 and 6) of the first slot.
- the CSI RS for antenna ports 19 and 20 is transmitted through the same resource element that the CSI RS for antenna ports 15 and 16 is transmitted, and the CSI RS for antenna ports 21 and 22 is transmitted to the CSI RS for antenna ports 17 and 18. It is transmitted through the same resource element.
- CQI-ReportConfig-r10 SEQUENCE ⁇ cqi-ReportAperiodic-r10 CQI-ReportAperiodic-r10 OPTIONAL,-Need ON nomPDSCH-RS-EPRE-Offset INTEGER (-1..6), cqi-ReportPeriodic-r10 CQI-ReportPeriodic-r10 OPTIONAL,-Need ON pmi-RI-Report-r9 ENUMERATED ⁇ setup ⁇ OPTIONAL,-Cond PMIRI csi-SubframePatternConfig-r10 CHOICE ⁇ release NULL, setup SEQUENCE ⁇ csi-MeasSubframeSet1-r10 MeasSubframePattern-r10, csi-MeasSubframeSet2-r10 MeasSubframePattern-r10 ⁇ ⁇ OPTIONAL-Need ON ⁇
- two MeasSubframePattern IEs exist for two subframe sets in the csi-SubframePatternConfig field of Table 5. That is, CSI can be measured separately for two sets of subframes.
- the two subframe sets may be an almost blank subrframe (ABS) subframe set and a general subframe set, respectively.
- ABS almost blank subrframe
- Table 6 shows an example of the CQI-ReportAperiodic IE included in the CQI-ReportConfig IE of Table 5.
- the CQI-ReportAperiodic IE configures aperiodic CQI reporting.
- CQI-ReportAperiodic-r10 CHOICE ⁇ release NULL, setup SEQUENCE ⁇ cqi-ReportModeAperiodic-r10 ENUMERATED ⁇ rm12, rm20, rm22, rm30, rm31, spare3, spare2, spare1 ⁇ , aperiodicCSI-Trigger-r10 SEQUENCE ⁇ trigger1-r10 BIT STRING (SIZE (8)), trigger2-r10 BIT STRING (SIZE (8)) ⁇ OPTIONAL-Need OR ⁇ ⁇
- the cqi-ReportModeAperiodic parameter indicates a CQI report mode.
- the aperiodic CSI-Trigger parameter indicates which aperiodic CSI reporting is triggered for which serving cell when one or more secondary cells (SCells) are configured.
- Table 7 shows an example of the CQI-ReportPeriodic IE included in the CQI-ReportConfig IE of Table 5.
- the CQI-ReportPeriodic IE configures periodic CQI reporting.
- CQI-ReportPeriodic-r10 CHOICE ⁇ release NULL, setup SEQUENCE ⁇ cqi-PUCCH-ResourceIndex-r10 INTEGER (0..1184), cqi-PUCCH-ResourceIndexP1-r10 INTEGER (0..1184) OPTIONAL,-Need OR cqi-pmi-ConfigIndex INTEGER (0..1023), cqi-FormatIndicatorPeriodic-r10 CHOICE ⁇ widebandCQI-r10 SEQUENCE ⁇ csi-ReportMode-r10 ENUMERATED ⁇ submode1, submode2 ⁇ OPTIONAL-Need OR ⁇ , subbandCQI-r10 SEQUENCE ⁇ k INTEGER (1..4), periodicityFactor-r10 ENUMERATED ⁇ n2, n4 ⁇ ⁇ ⁇ , ri-ConfigIndex INTEGER (0..1023) OPTIONAL,-Need OR simultaneous
- Table 8 shows an example of the MeasSubframePattern IE included in the CQI-ReportConfig IE of Table 5.
- MeasSubframePattern IE indicates a measurement resource restriction in the time domain.
- MeasSubframePattern-r10 CHOICE ⁇ subframePatternFDD-r10 BIT STRING (SIZE (40)), subframePatternTDD-r10 CHOICE ⁇ subframeConfig1-5-r10 BIT STRING (SIZE (20)), subframeConfig0-r10 BIT STRING (SIZE (70)) subframeConfig6-r10 BIT STRING (SIZE (60)), ... ⁇ , ... ⁇ -ASN1STOP
- the measurement of the CSI may be indicated through the upper layer whether the CSI is based on the CSI or the CRS, and the CSI may be measured separately for two sets of subframes.
- the plurality of nodes may estimate the channel and transmit or receive a signal based on the plurality of CSI RS configurations.
- the terminal monitors resource elements corresponding to the plurality of CSI RS configurations from the plurality of nodes through the CSI-RS-Config IE, which is an IE indicating the CSI RS configuration.
- the terminal may transmit or receive data based on some resource elements among the resource elements corresponding to the plurality of CSI RS configurations according to the channel state.
- a plurality of CSI RS configurations monitored by a terminal are referred to as a first CSI RS set, and CSI RS configurations based on the UE actually transmitting or receiving data are referred to as a second CSI RS set.
- the second CSI set may be a subset of the first CSI RS set.
- the UE may transmit or receive data by estimating a channel based on the second CSI RS set.
- the base station may indicate the second set of CSI RS to the terminal.
- the terminal may arbitrarily designate the second CSI RS set and inform the base station of the corresponding CSI RS configuration.
- FIG. 12 shows an example of configuration of a first CSI RS set and a second CSI RS set.
- a first set of CSI RSs includes a CSI RS configuration 1, a CSI RS configuration 2, and a CSI RS configuration 3.
- the total interference measured with other CSI RS configurations is represented by I SET1 .
- H 1 , H 2, and H 3 indicate channels corresponding to CSI RS configuration 1, CSI RS configuration 2, and CSI RS configuration 3, respectively.
- the UE may monitor CSI RS configurations belonging to the first CSI RS set.
- the second CSI RS set includes CSI RS Configuration 1 and CSI RS Configuration 3.
- the total interference measured with other CSI RS configurations is represented by I SET2 . That is, I SET2 includes interference measured by I SET1 and CSI RS configuration 2.
- the terminal may transmit or receive data based on CSI RS configurations belonging to the second CSI RS set.
- the terminal must feed back the channel state to the base station in order to determine the first CSI RS set or the second CSI RS set, and the terminal may regard the channels measured with different CSI RS configurations according to the channel state as interference.
- the terminal may regard the channel measured with the remaining CSI RS configurations except for the second CSI RS set as interference. That is, the terminal may regard the channels measured with all CSI RS configurations other than the CSI RS configuration for its data transmission or reception as interference.
- the terminal may regard the channels measured with all CSI RS configurations except for the first CSI RS set as interference.
- the CSI RS configuration belonging to the second CSI RS set may change depending on the channel state, all CSI RS configurations likely to belong to the second CSI RS set, i.e., the remaining CSI RS configurations except for the first CSI RS set.
- the measured channels can be regarded as interference.
- the base station instructs the terminal to the different CSI RS configuration in the CSI RS set to each terminal through each node corresponding to the CSI RS set.
- the base station may indicate the same zero-power CSI RS configuration to the terminal through each node corresponding to the CSI RS set. Accordingly, the UE can measure total interference for different CSI RS configurations indicated by the base station. In addition, since each channel corresponding to the indicated CSI RS configuration can be known, interference on each CSI RS configuration can also be measured.
- the base station directs the CSI RS configurations belonging to the first CSI RS set to the terminal through each node corresponding to the first CSI RS set.
- the base station may indicate the same zero-power CSI RS configuration through each node corresponding to the first CSI RS set. That is, each node of the base station corresponding to the first CSI set indicates the CSI RS configuration through the CSI RS configuration parameter (resourceConfig) in the CSI-RS-Config IE of Table 1, and provides a zero power CSI RS configuration parameter (zeroTxPowerResourceConfigList).
- the zero power CSI Rs configuration can be indicated.
- the terminal may measure the total interference I SET1 for the first set of CSI RSs based on the indicated zero power CSI RS configuration.
- the channels H 1 , H 2 , and H 3 corresponding to each CSI RS configuration may be measured according to the CSI RS configuration in the first CSI RS set.
- the interference for the CSI RS configuration belonging to the first CSI RS set and not belonging to the second CSI RS set is added to the interference for the first CSI RS set.
- the total interference for the second CSI RS set may be calculated by Equation 2.
- FIG. 13 shows an example of a zero power CSI RS configured according to the proposed interference measuring method.
- CSI RS Configuration 1, CSI RS Configuration 2, and CSI RS Configuration 3 in the first CSI RS set are indicated to the UE through each node of the base station corresponding to the first CSI RS set, and the same zero-power CSI RS configuration is indicated through each node of the base station corresponding to the first CSI set. Accordingly, the terminal can measure the interference on the first CSI RS set. In addition, the terminal may measure interference on the second CSI RS set according to Equation 2.
- the base station may indicate the zero power CSI RS configuration for each CSI RS configuration for which interference measurement is desired.
- the base station instructs the CSI RS configuration belonging to the first CSI RS set to the terminal through each node corresponding to the first CSI RS set, and assigns the same first zero-power CSI RS configuration to the first CSI RS set.
- This may be indicated through each corresponding node. Accordingly, the total interference I SET1 for the first CSI RS set can be measured.
- the base station may indicate the same second zero-power CSI RS configuration through each node corresponding to the second CSI RS set. Accordingly, the total interference I SET2 for the second CSI RS set can be measured. Accordingly, the UE can easily measure the interference on the first CSI RS set and the interference on the second CSI RS set.
- signaling overhead that requires instructing the zero-power CSI RS configuration several times.
- FIG. 14 shows another example of a zero power CSI RS configured according to the proposed interference measuring method.
- CSI RS Configuration 1, CSI RS Configuration 2, and CSI RS Configuration 3 in the first CSI RS set are indicated to the UE through each node of the base station corresponding to the first CSI RS set, and the same first zero.
- the power CSI RS configuration is indicated through each node of the base station corresponding to the first CSI RS set. Accordingly, the terminal can measure the interference on the first CSI RS set.
- the same second zero power CSI RS configuration is indicated through each node of the base station corresponding to the second CSI RS set including the first CSI RS configuration and the third CSI RS configuration. Accordingly, the UE can measure the interference on the second CSI RS set.
- the base station transmits a plurality of CSI-RS-Config IEs to the terminal, or defines a new CSI RS configuration IE so as to indicate a plurality of CSI RS configurations to the terminal. Can be sent to.
- a zero power CSI RS configuration used for the purpose of interference measurement needs to be defined.
- a new CSI RS configuration IE is defined, a zero power CSI RS configuration used for interference measurement needs to be defined and a plurality of CSI RS configurations need to be included in one IE.
- a plurality of zero power CSI RS configurations may be required.
- Table 9 shows an example of a CSI RS configuration IE newly defined for a plurality of CSI RS configurations.
- Table 9 is only an example of the CSI RS configuration, the fields or parameters described in Table 9 may be omitted, and the fields or parameters not described in Table 9 may be included in the CSI RS configuration IE.
- New CSI-RS Configuration IE ⁇ For (mutiple CSI-RS configuration) ⁇ Antenna port number, Resource configuration, Subframe configuration, Power control,... ⁇ For (multiple zeroTxPower CSI-RS configuration set1)-optional ⁇ CSI-RS configuration indices using this zero TxPower CSI-RS configurations, Resource configuration, Subframe configuration,... ⁇ For (multiple zeroTxPower CSI-RS configuration set2)-optional ⁇ CSI-RS configuration indices using this zero TxPower CSI-RS configurations, Resource configuration, Subframe configuration,... ⁇ ⁇
- step S100 the terminal receives a plurality of CSI RS configurations from the base station through a plurality of nodes of the base station.
- step S110 the terminal receives the same zero-power CSI RS configuration through a plurality of nodes of the base station.
- step S120 the UE measures the interference on the plurality of CSI RS configurations based on the zero power CSI RS configuration.
- the terminal may variously perform feedback to the base station according to the type of interference.
- the UE may measure the interference on the first CSI RS set, and accordingly calculate a channel to feed back the CQI.
- the terminal may measure the interference on the second set of CSI RS, and accordingly calculate a channel to feed back the CQI.
- the UE measures both interference with respect to the first CSI RS set and the second CSI RS set, and accordingly calculates a channel to feed back the CQI.
- the terminal may measure interference with any one of the first CSI RS set or the second CSI RS set according to the indication of the base station, and may calculate a channel to feed back the CQI.
- the UE may optionally measure interference with any one of the first CSI RS set or the second CSI RS set, and accordingly calculate a channel to feed back the CQI. At this time, the UE should inform the base station which CSI RS is fed back by measuring interference on which CSI RS set.
- 16 is a block diagram of a wireless communication system in which an embodiment of the present invention is implemented.
- the base station 800 includes a processor 810, a memory 820, and an RF unit 830.
- Processor 810 implements the proposed functions, processes, and / or methods. Layers of the air interface protocol may be implemented by the processor 810.
- the memory 820 is connected to the processor 810 and stores various information for driving the processor 810.
- the RF unit 830 is connected to the processor 810 to transmit and / or receive a radio signal.
- the terminal 900 includes a processor 910, a memory 920, and an RF unit 930.
- Processor 910 implements the proposed functions, processes, and / or methods. Layers of the air interface protocol may be implemented by the processor 910.
- the memory 920 is connected to the processor 910 and stores various information for driving the processor 910.
- the RF unit 930 is connected to the processor 910 to transmit and / or receive a radio signal.
- Processors 810 and 910 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
- the memory 820, 920 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium, and / or other storage device.
- the RF unit 830 and 930 may include a baseband circuit for processing a radio signal.
- the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
- the module may be stored in the memory 820, 920 and executed by the processor 810, 910.
- the memories 820 and 920 may be inside or outside the processors 810 and 910, and may be connected to the processors 810 and 910 by various well-known means.
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Abstract
Description
-- ASN1START CSI-RS-Config-r10 ::= SEQUENCE { csi-RS-r10 CHOICE { release NULL, setup SEQUENCE { antennaPortsCount-r10 ENUMERATED {an1, an2, an4, an8}, resourceConfig-r10 INTEGER (0..31), subframeConfig-r10 INTEGER (0..154), p-C-r10 INTEGER (-8..15) } } OPTIONAL, -- Need ON zeroTxPowerCSI-RS-r10 CHOICE { release NULL, setup SEQUENCE { zeroTxPowerResourceConfigList-r10 BIT STRING (SIZE (16)), zeroTxPowerSubframeConfig-r10 INTEGER (0..154) } } OPTIONAL -- Need ON } -- ASN1STOP |
구성되는 CSI RS의 개수 | |||||||
1 or 2 | 4 | 8 | |||||
CSI RS 구성 인덱스 | (k`,l`) | ns mod 2 | (k`,l`) | ns mod 2 | (k`,l`) | ns mod 2 | |
TDD 및 FDD 프레임 |
0 | (9,5) | 0 | (9,5) | 0 | (9,5) | 0 |
″ | 1 | (11,2) | 1 | (11,2) | 1 | (11,2) | 1 |
″ | 2 | (9,2) | 1 | (9,2) | 1 | (9,2) | 1 |
″ | 3 | (7,2) | 1 | (7,2) | 1 | (7,2) | 1 |
″ | 4 | (9,5) | 1 | (9,5) | 1 | (9,5) | 1 |
″ | 5 | (8,5) | 0 | (8,5) | 0 | ||
″ | 6 | (10,2) | 1 | (10,2) | 1 | ||
″ | 7 | (8,2) | 1 | (8,2) | 1 | ||
″ | 8 | (6,2) | 1 | (6,2) | 1 | ||
″ | 9 | (8,5) | 1 | (8,5) | 1 | ||
″ | 10 | (3,5) | 0 | ||||
″ | 11 | (2,5) | 0 | ||||
″ | 12 | (5,2) | 1 | ||||
″ | 13 | (4,2) | 1 | ||||
″ | 14 | (3,2) | 1 | ||||
″ | 15 | (2,2) | 1 | ||||
″ | 16 | (1,2) | 1 | ||||
″ | 17 | (0,2) | 1 | ||||
″ | 18 | (3,5) | 1 | ||||
″ | 19 | (2,5) | 1 | ||||
TDD 프레임 |
20 | (11,1) | 1 | (11,1) | 1 | (11,1) | 1 |
″ | 21 | (9,1) | 1 | (9,1) | 1 | (9,1) | 1 |
″ | 22 | (7,1) | 1 | (7,1) | 1 | (7,1) | 1 |
″ | 23 | (10,1) | 1 | (10,1) | 1 | ||
″ | 24 | (8,1) | 1 | (8,1) | 1 | ||
″ | 25 | (6,1) | 1 | (6,1) | 1 | ||
″ | 26 | (5,1) | 1 | ||||
″ | 27 | (4,1) | 1 | ||||
″ | 28 | (3,1) | 1 | ||||
″ | 29 | (2,1) | 1 | ||||
″ | 30 | (1,1) | 1 | ||||
″ | 31 | (0,1) | 1 |
구성되는 CSI RS의 개수 | |||||||
1 or 2 | 4 | 8 | |||||
CSI RS 구성 인덱스 | (k`,l`) | ns mod 2 | (k`,l`) | ns mod 2 | (k`,l`) | ns mod 2 | |
TDD 및 FDD 프레임 |
0 | (11,4) | 0 | (11,4) | 0 | (11,4) | 0 |
″ | 1 | (9,4) | 0 | (9,4) | 0 | (9,4) | 0 |
″ | 2 | (10,4) | 1 | (10,4) | 1 | (10,4) | 1 |
″ | 3 | (9,4) | 1 | (9,4) | 1 | (9,4) | 1 |
″ | 4 | (5,4) | 0 | (5,4) | 0 | ||
″ | 5 | (3,4) | 0 | (3,4) | 0 | ||
″ | 6 | (4,4) | 1 | (4,4) | 1 | ||
″ | 7 | (3,4) | 1 | (3,4) | 1 | ||
″ | 8 | (8,4) | 0 | ||||
″ | 9 | (6,4) | 0 | ||||
″ | 10 | (2,4) | 0 | ||||
″ | 11 | (0,4) | 0 | ||||
″ | 12 | (7,4) | 1 | ||||
″ | 13 | (6,4) | 1 | ||||
″ | 14 | (1,4) | 1 | ||||
″ | 15 | (0,4) | 1 | ||||
TDD 프레임 |
16 | (11,1) | 1 | (11,1) | 1 | (11,1) | 1 |
″ | 17 | (10,1) | 1 | (10,1) | 1 | (10,1) | 1 |
″ | 18 | (9,1) | 1 | (9,1) | 1 | (9,1) | 1 |
″ | 19 | (5,1) | 1 | (5,1) | 1 | ||
″ | 20 | (4,1) | 1 | (4,1) | 1 | ||
″ | 21 | (3,1) | 1 | (3,1) | 1 | ||
″ | 22 | (8,1) | 1 | ||||
″ | 23 | (7,1) | 1 | ||||
″ | 24 | (6,1) | 1 | ||||
″ | 25 | (2,1) | 1 | ||||
″ | 26 | (1,1) | 1 | ||||
″ | 27 | (0,1) | 1 |
CSI-RS-SubframeConfig ICSI-RS |
CSI-RS 주기 TCSI-RS (서브프레임) |
CSI-RS 서브프레임 오프셋 ΔCSI-RS (subframes) |
0 - 4 | 5 | ICSI-RS |
5 - 14 | 10 | ICSI-RS-5 |
15 - 34 | 20 | ICSI-RS-15 |
35 - 74 | 40 | ICSI-RS-35 |
75 - 154 | 80 | ICSI-RS-75 |
CQI-ReportConfig-r10 ::= SEQUENCE { cqi-ReportAperiodic-r10 CQI-ReportAperiodic-r10 OPTIONAL, -- Need ON nomPDSCH-RS-EPRE-Offset INTEGER (-1..6), cqi-ReportPeriodic-r10 CQI-ReportPeriodic-r10 OPTIONAL, -- Need ON pmi-RI-Report-r9 ENUMERATED {setup} OPTIONAL, -- Cond PMIRI csi-SubframePatternConfig-r10 CHOICE { release NULL, setup SEQUENCE { csi-MeasSubframeSet1-r10 MeasSubframePattern-r10, csi-MeasSubframeSet2-r10 MeasSubframePattern-r10 } } OPTIONAL -- Need ON } |
CQI-ReportAperiodic-r10::= CHOICE { release NULL, setup SEQUENCE { cqi-ReportModeAperiodic-r10 ENUMERATED { rm12, rm20, rm22, rm30, rm31, spare3, spare2, spare1}, aperiodicCSI-Trigger-r10 SEQUENCE { trigger1-r10 BIT STRING (SIZE (8)), trigger2-r10 BIT STRING (SIZE (8)) } OPTIONAL -- Need OR } } |
CQI-ReportPeriodic-r10 ::= CHOICE { release NULL, setup SEQUENCE { cqi-PUCCH-ResourceIndex-r10 INTEGER (0..1184), cqi-PUCCH-ResourceIndexP1-r10 INTEGER (0..1184) OPTIONAL, -- Need OR cqi-pmi-ConfigIndex INTEGER (0..1023), cqi-FormatIndicatorPeriodic-r10 CHOICE { widebandCQI-r10 SEQUENCE { csi-ReportMode-r10 ENUMERATED {submode1, submode2} OPTIONAL -- Need OR }, subbandCQI-r10 SEQUENCE { k INTEGER (1..4), periodicityFactor-r10 ENUMERATED {n2, n4} } }, ri-ConfigIndex INTEGER (0..1023) OPTIONAL, -- Need OR simultaneousAckNackAndCQI BOOLEAN, cqi-Mask-r9 ENUMERATED {setup} OPTIONAL, -- Need OR csi-ConfigIndex-r1 CHOICE { release NULL, setup SEQUENCE { cqi-pmi-ConfigIndex2-r10 INTEGER (0..1023), ri-ConfigIndex2-r10 INTEGER (0..1023) OPTIONAL -- Need OR } } OPTIONAL -- Need ON } } |
-- ASN1START MeasSubframePattern-r10 ::= CHOICE { subframePatternFDD-r10 BIT STRING (SIZE (40)), subframePatternTDD-r10 CHOICE { subframeConfig1-5-r10 BIT STRING (SIZE (20)), subframeConfig0-r10 BIT STRING (SIZE (70)) subframeConfig6-r10 BIT STRING (SIZE (60)), ... }, ... } -- ASN1STOP |
New CSI-RS Configuration IE { For (mutiple CSI-RS configuration) { Antenna port number, Resource configuration, Subframe configuration, Power control,… } For (multiple zeroTxPower CSI-RS configuration set1) - optional { CSI-RS configuration indices using this zeroTxPower CSI-RS configurations, Resource configuration, Subframe configuration,… } For (multiple zeroTxPower CSI-RS configuration set2) - optional { CSI-RS configuration indices using this zeroTxPower CSI-RS configurations, Resource configuration, Subframe configuration,… } } |
Claims (15)
- 무선 통신 시스템에서 단말(UE; user equipment)에 의한 간섭을 측정하는 방법에 있어서,
기지국으로부터 제1 CSI(channel state information) RS(reference signal) 집합에 속하는 복수의 CSI RS 구성(configuration)들을 상기 제1 CSI 집합에 대응되는 기지국의 복수의 노드들을 통해 수신하고,
제1 영전력(zero-power) CSI RS 구성을 상기 제1 CSI 집합에 대응되는 기지국의 복수의 노드들을 통해 수신하고,
상기 제1 영전력 CSI RS 구성을 기반으로 상기 제1 CSI RS 집합에 대한 간섭을 측정하는 것을 포함하는 방법. - 제 1 항에 있어서,
상기 제1 CSI RS 집합에 속하는 복수의 CSI RS 구성들은 상기 단말이 모니터링 하는 CSI RS 구성들인 것을 특징으로 하는 방법. - 제 1 항에 있어서,
상기 단말이 데이터를 전송 또는 수신하는 복수의 CSI RS 구성들을 포함하는 제2 CSI RS 집합에 대한 간섭을 측정하는 것을 더 포함하는 방법. - 제 3 항에 있어서,
상기 제2 CSI RS 집합에 대한 간섭을 측정하는 것은,
제2 영전력 CSI RS 구성을 상기 제2 CSI 집합에 대응되는 기지국의 복수의 노드들을 통해 수신하고,
상기 제2 영전력 CSI RS 구성을 기반으로 상기 제2 CSI RS 집합에 대한 간섭을 측정하는 것을 포함하는 것을 특징으로 하는 방법. - 제 3 항에 있어서,
상기 제2 CSI RS 집합은 상기 제1 CSI 집합에 포함되는 것을 특징으로 하는 방법. - 제 1 항에 있어서,
상기 복수의 CSI RS 구성들은 복수의 CSI RS 구성 IE(information element)를 통해 수신되는 것을 특징으로 하는 방법. - 제 1 항에 있어서,
상기 복수의 CSI RS 구성들은 새롭게 정의된 하나의 CSI RS 구성 IE를 통해 수신되는 것을 특징으로 하는 방법. - 제 1 항에 있어서,
상기 제1 CSI RS 집합에 속하는 각 CSI RS 구성에 대응되는 채널을 추정하는 것을 더 포함하는 방법. - 제 9 항에 있어서,
상기 추정된 채널을 기반으로 CQI(channel quality indicator)를 상기 기지국으로 전송하는 것을 더 포함하는 방법. - 무선 통신 시스템에서 간섭을 측정하는 단말에 있어서,
무선 신호를 전송 또는 수신하는 RF(radio frequency)부; 및
상기 RF부와 연결되는 프로세서를 포함하되,
상기 프로세서는,
기지국으로부터 제1 CSI(channel state information) RS(reference signal) 집합에 속하는 복수의 CSI RS 구성(configuration)들을 상기 제1 CSI 집합에 대응되는 기지국의 복수의 노드들을 통해 수신하고,
제1 영전력(zero-power) CSI RS 구성을 상기 제1 CSI 집합에 대응되는 기지국의 복수의 노드들을 통해 수신하고,
상기 제1 영전력 CSI RS 구성을 기반으로 상기 제1 CSI RS 집합에 대한 간섭을 측정하도록 구성되는 단말. - 제 11 항에 있어서,
상기 제1 CSI RS 집합에 속하는 복수의 CSI RS 구성들은 상기 단말이 모니터링 하는 CSI RS 구성들인 것을 특징으로 하는 단말. - 제 11 항에 있어서,
상기 프로세서는 상기 단말이 데이터를 전송 또는 수신하는 복수의 CSI RS 구성들을 포함하는 제2 CSI RS 집합에 대한 간섭을 측정하도록 더 구성되는 것을 특징으로 하는 단말. - 제 13 항에 있어서,
상기 제2 CSI RS 집합에 대한 간섭을 측정하는 것은,
제2 영전력 CSI RS 구성을 상기 제2 CSI 집합에 대응되는 기지국의 복수의 노드들을 통해 수신하고,
상기 제2 영전력 CSI RS 구성을 기반으로 상기 제2 CSI RS 집합에 대한 간섭을 측정하도록 구성되는 것을 특징으로 하는 단말.
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US14/345,892 US20150003269A1 (en) | 2011-09-26 | 2012-09-06 | Method and apparatus for measuring interference in wireless communication system |
JP2014529613A JP5766881B2 (ja) | 2011-09-26 | 2012-09-06 | 無線通信システムにおいて干渉を測定する方法及び装置 |
EP12836221.7A EP2763325A4 (en) | 2011-09-26 | 2012-09-06 | METHOD AND DEVICE FOR MEASURING INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM |
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JP2014529253A (ja) | 2014-10-30 |
KR101502740B1 (ko) | 2015-03-13 |
EP2763325A4 (en) | 2015-06-03 |
JP5766881B2 (ja) | 2015-08-19 |
US20150003269A1 (en) | 2015-01-01 |
CN103843259A (zh) | 2014-06-04 |
EP2763325A2 (en) | 2014-08-06 |
WO2013048030A3 (ko) | 2013-05-23 |
KR20140049586A (ko) | 2014-04-25 |
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