CN105162510B - The method and apparatus of reference signal is received in a wireless communication system - Google Patents

The method and apparatus of reference signal is received in a wireless communication system Download PDF

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Publication number
CN105162510B
CN105162510B CN201510552017.2A CN201510552017A CN105162510B CN 105162510 B CN105162510 B CN 105162510B CN 201510552017 A CN201510552017 A CN 201510552017A CN 105162510 B CN105162510 B CN 105162510B
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cqi
antenna
subframe
resource elements
ofdm symbol
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CN105162510A (en
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高贤秀
韩承希
具滋昊
郑载薰
任彬哲
李文
李文一
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04L27/2611—
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0026—Division using four or more dimensions
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03777—Arrangements for removing intersymbol interference characterised by the signalling
    • H04L2025/03802—Signalling on the reverse channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • 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
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H04L5/0039—Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • 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
    • H04L5/0078—Timing of allocation
    • H04L5/0085—Timing of allocation when channel conditions change

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

Abstract

Provide a kind of method and apparatus of transmitted reference signal in multi-antenna systems.This method comprises: selecting at least one OFDM symbol in the subframe comprising multiple orthogonal frequency division multiplexing (OFDM) symbol；Channel quality instruction reference signal (CQI RS) of the channel status of each for mutiple antennas can be measured to the distribution of at least one selected OFDM symbol；And transmitting CQI RS, wherein CQI RS is assigned to OFDM symbol, the OFDM symbol not be assigned with the OFDM symbol of public reference signal of all user equipmenies being launched into cell is Chong Die, or not be assigned with the OFDM symbol of DRS (Dedicated Reference Signal) of specific user equipment being launched into the cell is Chong Die.

Description

The method and apparatus of reference signal is received in a wireless communication system
It is on March 23rd, 2010 that the application, which is application No. is the 201080013694.2, applying date, entitled " in multiple antennas The divisional application of the patent application of the method and apparatus of transmitted reference signal in system ".
Technical field
The present invention relates to wireless communication, more particularly relate in multi-antenna systems the method for transmitted reference signal and Equipment.
Background technique
In order to maximize the performance and communication capacity of wireless communication system, multiple-input and multiple-output (MIMO) system was in recent years It has been paid close attention to.From the traditional technology evolution for using single transmitting (Tx) antenna and single reception (Rx) antenna, MIMO technology Being improved using multiple Tx antennas and multiple Rx antennas will emit or the transmission efficiency of received data.Mimo system is also referred to as Multiaerial system.In MIMO technology, an entire message is not received by individual antenna path, pass through mutiple antennas Data sectional is received, then they are collected as a data.As a result, can in particular range improve data transfer rate, Or system scope can be increased relative to particular data transmission rate.
MIMO technology includes transmitting diversity, spatial reuse and Wave beam forming.Transmitting diversity is plurality of Tx antenna transmitting Same data make the increased technology of launcher reliability.Spatial reuse be plurality of Tx antenna and meanwhile emit different data with Technology of the data without increasing system bandwidth can be emitted at high speed.Wave beam forming is used for according to channel condition to mutiple antennas In addition weight, to improve the signal and interference-to-noise ratio (SINR) of signal.In such a case it is possible to by weighing vector or add Weight matrix expresses the weighting, and the weighing vector or weighting matrix be known respectively as precoding vector or pre-coding matrix.
Spatial reuse is classified as single user spatial reuse and Multi-User Dimension multiplexing.Single user spatial reuse is also referred to as Single User MIMO (SU-MIMO).Multi-User Dimension multiplexing is also referred to as space division multiple access (SDMA) or multiuser MIMO (MU- MIMO).The capacity of mimo channel and the quantity of antenna proportionally increase.Mimo channel can be broken down into independent channel. If the quantity of Tx antenna is Nt, and the quantity of Rx antenna is Nr, then the quantity of independent channel is Ni, wherein Ni≤min {Nt,Nr}.Each independent channel can be referred to as space layer.Order indicates the quantity of the characteristic value of the non-zero of mimo channel, And it can be defined as the quantity for the spatial flow that can be multiplexed.
For the purpose of data transmitting/reception, the synchronous acquisition of system, feedback of channel information etc., need in wireless communication system Estimating uplink channel or downlink channel in system.Channel estimation is by compensation since decline causes to occur rapidly Distorted signals in the environment of change restores to emit the processing of signal.In general, channel estimation needs transmitter and receiver two Reference signal or pilot tone known to person.
In multi-antenna systems, each antenna can undergo different channels, it is therefore desirable to by considering each day Line carrys out the deployment architecture of design reference signal.Traditionally, when emitting signal to user equipment from base station, up to 4 are being used Reference signal is disposed under the hypothesis of antenna.However, Next-Generation Wireless Communication Systems can be by using greater number of antenna, i.e., Up to 8 antennas emit down link signal.In this case, deployment and transmitted reference signal are required consideration for how.
Summary of the invention
Technical problem
The present invention provides a kind of methods and apparatus in multiaerial system transmitted reference signal.
Technical solution
According to an aspect of the present invention, a method of for transmitted reference signal in multi-antenna systems.The side Method includes: to select at least one orthogonal frequency division multiplexing (OFDM) symbol in the subframe for including multiple ofdm signals；To selection The distribution of at least one OFDM symbol can measure the channel quality instruction reference signal of the channel status of each of mutiple antennas (CQI RS)；And transmitting CQI RS, wherein CQI RS is assigned to OFDM symbol, the OFDM symbol not be assigned with quilt Be emitted to the public reference signal of all user equipmenies in cell OFDM symbol overlapping, or not be assigned with and will be launched The OFDM symbol of the DRS (Dedicated Reference Signal) of specific user equipment into the cell is overlapped.
Beneficial effect
It makes comparisons with traditional antenna in multi-antenna systems, reference signal corresponding with greater number of antenna can lead to It crosses and is disposed in various ways according to obtainable radio resource to be launched.I.e., it is possible to according to the case where wireless communication system come Adaptively transmitted reference signal.
Detailed description of the invention
Fig. 1 shows the structure of wireless communication system.
Fig. 2 shows wireless frame structures.
Fig. 3 shows the example of the resource grid for a downlink time slots.
Fig. 4 shows the structure of subframe.
Fig. 5 shows the exemplary structure of the public reference signal (RS) for an antenna.
Fig. 6 shows the exemplary structure of the public RS for two antennas.
Fig. 7 shows the exemplary of the public RS for four antennas when using normal cyclic prefix (CP) in subframe Structure.
Fig. 8 shows the exemplary structure of the public RS for four antennas when using CP is extended in subframe.
Fig. 9 shows the exemplary structure of dedicated RS when using normal CP in subframe.
Figure 10 shows the exemplary structure of dedicated RS when using CP is extended in subframe.
The method that Figure 11 shows the transmitted reference signal in multi-antenna systems of embodiment according to the present invention.
Figure 12 is shown in orthogonal frequency division multiplexing (OFDM) symbol to four resource element deployment channel quality instructions Accord with the example of (CQI) RS.
Figure 13 shows the example for disposing two CQI RS to four resource elements in an OFDM symbol.
Figure 14 shows the example for disposing four CQI RS to four resource elements in an OFDM symbol.
Figure 15 shows the example that the CQI RS dispositions method described in Figure 14 is applied to subframe.
Figure 16 is shown in an OFDM symbol to the example of 6 resource element deployment CQI RS.
Figure 17 shows the example for applying the CQI RS dispositions method described in Figure 16.
Figure 18 shows an example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, CQI RS is disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 19 shows another example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, CQI RS is disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 20 shows an example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, Two CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 21 shows other examples, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, Two CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 22 shows another example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, 4 CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 23 shows other examples, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, 4 CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 24 shows another example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, 8 CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 25 shows other examples, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, 8 CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 26 shows the example that the CQI RS dispositions method described in Figure 22 is applied to subframe.
Figure 27 shows the example that the CQI RS dispositions method described in Figure 24 is applied to subframe.
Figure 28 to Figure 33 shows the example for disposing 8 CQI RS to 8 resource elements in subframe.
Figure 34 shows multiple examples, wherein emit CQI RS in two OFDM symbols in subframe, and wherein, CQI RS is disposed to four resource elements in frequency band corresponding with a resource block.
Figure 35 shows the example for disposing two CQI RS to four resource elements in two OFDM symbols.
Figure 36 shows the example for disposing four CQI RS to four resource elements in two OFDM symbols.
Figure 37 shows the example for disposing four CQI RS in two OFDM symbols in subframe to four resource elements.
Figure 38 shows an example, wherein disposes CQI to four resource elements in two OFDM symbols in subframe RS, wherein CQI RS is deployed to the resource element pattern having the same of each OFDM symbol.
Figure 39 shows an example, wherein disposes two to four resource elements in two OFDM symbols in subframe CQI RS。
Figure 40 shows the example for disposing four CQI RS in two OFDM symbols in subframe to four resource elements.
Figure 41 shows an example, wherein emit CQI RS in two OFDM symbols in subframe, and wherein, CQI RS is disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 42 is shown in two OFDM symbols in subframe to other examples of 8 resource element deployment CQI RS.
Figure 43 shows the example for disposing two CQI RS in two OFDM symbols in subframe to 8 resource elements.
Figure 44 shows the example for disposing two CQI RS in two OFDM symbols in subframe to 8 resource elements.
Figure 45 to Figure 47 shows in two OFDM symbols in subframe and disposes showing for four CQI RS to 8 resource elements Example.
Figure 48 shows an example, wherein emits CQI RS in two OFDM symbols in subframe, and wherein, to 8 A resource element disposes four CQI RS.
Figure 49 shows another example, wherein emit CQI RS in two OFDM symbols in subframe, and wherein, Four CQI RS are disposed to 8 resource elements.
Figure 50 and Figure 51 shows multiple examples, wherein emits CQI RS, and its in two OFDM symbols in subframe In, 8 CQI RS are disposed to 8 resource elements.
Figure 52 to Figure 64 shows multiple examples, wherein emit CQI RS in two OFDM symbols for resource area, And 8 CQI RS wherein, are disposed to 8 resource elements, wherein resource area includes a subframe in the time domain, and It include 12 subcarriers in frequency domain.
Figure 65 is shown in two OFDM symbols in subframe to the example of 12 resource element deployment CQI RS.
Figure 66 is shown in two OFDM symbols in subframe to the example of 16 resource element deployment CQI RS.
Figure 67 shows the example for disposing two CQI RS in two OFDM symbols in subframe to 16 resource elements.
Figure 68 and Figure 69 shows in two OFDM symbols in subframe and disposes two CQI RS's to 16 resource elements Other examples.
Figure 70 and Figure 71 shows in two OFDM symbols in subframe and disposes showing for 4 CQI RS to 16 resource elements Example.
Figure 72 and Figure 73 shows in two OFDM symbols in subframe and disposes showing for 8 CQI RS to 16 resource elements Example.
Figure 74 shows an example, wherein emits CQI RS, and its in two OFDM symbols for resource area In, 4 CQI RS are disposed to 16 resource elements, wherein resource area includes a subframe in the time domain, and in a frequency domain Including 12 subcarriers.
Figure 75 shows an example, wherein emits CQI RS, and its in two OFDM symbols for resource area In, 8 CQI RS are disposed to 16 resource elements, wherein resource area includes a subframe in the time domain, and in a frequency domain Including 12 subcarriers.
Specific embodiment
Fig. 1 shows the structure of wireless communication system.The wireless communication system can have evolved universal mobile communication system (E-UMTS) network structure.E-UMTS system can also be referred to as long term evolution (LTE) system.Wireless communication system can be by It is widely deployed to provide plurality of communication services, voice, packet data etc..
With reference to Fig. 1, the UMTS Terrestrial radio access network (E-UTRAN) of evolution includes providing control plane and user plane At least one base station (BS) 20.
What user equipment (UE) 10 can be fixed or move, and another term can be referred to as, such as move Platform (MS), user terminal (UT), subscriber station (SS), wireless device etc..BS 20 is usually the fixed station communicated with UE 10, And another term can be referred to as, node B, base transceiver system (BTS), access point etc..In the covering of BS 20 There are one or more cells in range.Cell is to provide the region of communication service in wherein BS 20.It can make between BS 20 With for emitting customer service or controlling the interface of business.Hereinafter, downlink is defined as from BS 20 to UE 10 communication Link, also, uplink is defined as from UE 10 to BS 20 link.
BS 20 is interconnected by X2 interface.BS 20 is connected to the block core (EPC) of evolution also by S1 interface, has more Body, it is connected to mobile management entity (MME)/gateway (S-GW) 30.S1 interface is supported in BS 20 and MME/S-GW 30 Between many-to-many relationship.
Can lower three layers based on well known open system interconnection (OSI) model in a communications system will UE with The layer of Radio interface protocols between network is divided into L1 layers (first layers), L2 layers (second layers) and L3 layers (third layer).First Layer is physical layer (PHY layer).The second layer can be divided into medium access control (MAC) layer, wireless spread-spectrum technology (RLC) layer and Packet data convergence protocol (PDCP) layer.Third layer is wireless heterogeneous networks (RRC) layer.
Wireless communication system can be based on orthogonal frequency division multiplexing (OFDM)/orthogonal frequency division multiple access (OFDMA) system. OFDM uses multiple orthogonal sub-carriers.Moreover, OFDM use is in inverse Fast Fourier Transform (IFFT) and Fast Fourier Transform (FFT) orthogonality between.Transmitter emits data by executing IFFT for data.Receiver passes through received for institute Signal executes FFT to restore initial data.Transmitter combines multiple subcarriers using IFFT, and receiver is come using FFT Separate multiple subcarriers.
Wireless communication system can be multiaerial system.Multiaerial system can be multiple-input and multiple-output (MIMO) system. Multiaerial system can be multiple input single output (MISO) system, single-input single-output (SISO) system or single input and multi-output (SIMO) system.Mimo system uses multiple transmitting (Tx) antennas and multiple reception (Rx) antennas.MISO system uses multiple Tx Antenna and a Rx antenna.SISO system uses a Tx antenna and a Rx antenna.SIMO system using Tx antenna and Multiple Rx antennas.
The scheme using mutiple antennas can be used in multiaerial system.In the case where order 1, the volume when program can be sky Code (STC) (for example, space-time/frequency block code (SFBC) and Space-Time Block Coding (STBC)), cyclic delay diversity (CDD), frequency error factor Tx diversity (FSTD), Tx diversity (TSTD) of time-switching etc..In the case where order 2 or higher order, the scheme be can be Spatial reuse (SM), general cyclic delay diversity (GCDD), selective virtual antenna permutation (S-VAP) etc..SFBC is to use In effectively application is selective to guarantee the diversity gain and multi-subscriber dispatching in corresponding dimension in spatial domain and frequency domain The scheme of gain.STBC is the scheme for applying selectivity in spatial domain and time domain.FSTD be wherein based on frequency come The scheme of the signal emitted to mutiple antennas is divided, and TSTD is wherein to emit based on the time to divide to mutiple antennas The scheme of signal.SM is for emitting different data to each antenna to improve the scheme of transmission rate.GCDD be for when Using the scheme of selectivity in domain and frequency domain.S-VAP is using the scheme of single pre-coding matrix, and includes: multi-code word (MCW) S-VAP, for multiple code words to be mixed into antenna in space diversity or spatial reuse；And use single code word Single codeword (SCW) S-VAP.
Fig. 2 shows wireless frame structures.
With reference to Fig. 2, radio frames are made of 10 subframes.One subframe is made of two time slots.Use time-gap number 0-19 The time-gap number that will include in radio frames.Time needed for emitting a subframe is defined as transmission time interval (TTI). TTI can be the scheduling unit for data transmitting.For example, a radio frames can have the length of 10 microseconds (ms), one Subframe can have the length of 1ms, also, a time slot can have the length of 0.5ms.
Structure the being given for example only property purpose of radio frames, therefore, the quantity for the subframe for including in radio frames or in subframe In include the quantity of time slot can differently change.
Fig. 3 shows the example of the resource grid for a downlink time slots.
With reference to Fig. 3, downlink time slots include multiple OFDM symbols in the time domain and N in a frequency domainDLA resource block (RB).The quantity N for the resource block for including in downlink time slotsDLDependent on downlink emission band determining in the cell It is wide.For example, in LTE system, NDLIt can be 60 to 110 any one of value.One RB includes multiple sons in a frequency domain Carrier wave.
Each element on resource grid is referred to as resource element.Resource element on resource grid can by Index in time slot identifies (k, l).Here, k (k=0 ..., NDL× 12-1) sub-carrier indices of expression in a frequency domain, and And l (l=0 ..., 6) indicate that OFDM symbol in the time domain indexes.
Although there is described herein a such as RB includes 7 × 12 resource elements, 7 × 12 resource elements are by time domain In 7 OFDM symbols and 12 subcarriers in a frequency domain constitute, still, the quantity and subcarrier of the OFDM symbol in RB Quantity it is without being limited thereto.Therefore, the quantity of OFDM symbol and the quantity of subcarrier can depend on cyclic prefix (CP) length, frequency Rate interval etc. differently changes.For example, the quantity of OFDM symbol is 7 when using normal CP, and CP is extended when using When, the quantity of OFDM symbol is 6.In an OFDM symbol, the quantity of subcarrier can selected from 128,256,512,1024, 1536 and 2048.
Fig. 4 shows the structure of subframe.
With reference to Fig. 4, subframe includes two continuous slots.Most 3 in the preceding part of the first time slot in subframe A OFDM symbol corresponds to the control area that be assigned PDCCH.Remaining OFDM symbol corresponds to the number that be assigned PDSCH According to region.PDCCH notifies the resource allocation of PCH and DL-SCH to UE, and also notifies HARQ letter relevant to DL-SCH to UE Breath.PDCCH can carry uplink (UL) scheduling grant, which is used for uplink to UE notice The resource allocation of road transmitting.Other than PDCCH, the control channel of PCFICH, PHICH etc. can be assigned to control zone Domain.PCFICH notifies the quantity of the OFDM symbol for emitting PDCCH in subframe to UE.It can emit in each subframe PCFICH.PHICH carries HARQ affirmative acknowledgement (ACK)/negative response (NACK) signal in response to uplink transmitting.UE can To read the data information emitted via PDSCH by decoding the control information emitted via PDCCH.Although control area exists This includes three OFDM symbols, but the purpose of this being given for example only property.It therefore, can in control area include two OFDM Symbol or an OFDM symbol.The OFDM symbol in the control area of subframe included can be informed in by using PCFICH Quantity.
Hereinafter, the resource element for reference signal (RS) transmitting is referred to as reference symbol.Other than reference symbol Resource element can be used for data transmitting.Resource element for data transmitting is referred to as data symbol.
RS can be multiplied by scheduled RS sequence when being launched.For example, RS sequence can be pseudorandom (PN) sequence, m sequence Column etc..RS sequence can be binary sequence or sequence of complex numbers.As RS of the BS transmitting multiplied by RS sequence, UE can be reduced from phase The interference of the received RS of adjacent cell, therefore channel estimating performance can be improved.
RS can be classified as public RS and dedicated RS.Public RS is the RS emitted to all UE in one cell. Dedicated RS is the RS to particular UE group or particular UE transmitting in the cell.Public RS can also be referred to as the peculiar RS of cell.Specially The peculiar RS of UE can also be referred to as with RS.All downlink subframes can be used to emit public RS.It can be used to UE The specific resources region of distribution emits dedicated RS.
UE can execute data demodulation and channel quality measurement by using the channel information obtained from RS.Because wireless Channel has the characteristic of the delay extension as caused by Doppler effect and frequency and time change, so must be by considering frequency Rate and selection of time channel change design RS.Moreover, RS must be designed no more than expense appropriate so that data transmitting not by The influence of expense caused by being emitted by RS.
In the LTE system with 4 Tx antennas (that is, 4Tx emits), by using the SFBC- for control channel FSTD scheme is emitted as the RS that 4Tx is defined.UE obtains channel information by using RS, then executes demodulation.In LTE system In, 2 or 3 OFDM symbols are assigned to control channel, and son before the subframe being made of 14 or 12 continuous OFDM symbols The remaining OFDM symbol of frame is assigned to data channel.Specifically, the transmitting point defined using the antenna configuration according to BS Collection scheme carrys out emission control channel.
Firstly, public RS will be described.
Fig. 5 shows the exemplary structure of the public RS for an antenna.Fig. 6 shows the public RS's for two antennas Exemplary structure.Fig. 7 shows the exemplary structure of the public RS for four antennas when using normal CP in subframe.Figure 8 show the exemplary structure of the public RS for four antennas when using CP is extended in subframe.Can by quote come It herein include the 6.10.1 chapters and sections of 36.211 V8.4.0 of 3GPP TS (2008-09): technical specification group Radio Access Network；It drills Into general land wireless access (E-UTRA)；Physical channel and modulation (version 8).
With reference to Fig. 5 to 8, using the multi-antenna transmission of mutiple antennas, for each antenna, there are resources Grid, also, at least one RS for each antenna can be mapped to resource grid.RS for each antenna is by joining Examine symbol composition.Rp indicates the reference symbol of antenna #p (wherein, { 0,1,2,3 } p ∈).R0 to R3 is not mapped to the money of overlapping Source element.
In the OFDM symbol, each Rp can be positioned with the interval of 6 subcarriers.In subframe, the number of R0 Amount is equal to the quantity of R1, also, the quantity of R2 is equal to the quantity of R3.In subframe, the quantity of R2 and R3 are less than the number of R0 and R1 Amount.Rp is not used in any transmitting by the antenna other than antenna #p.This is in order to avoid the interference between antenna. The quantity of the public RS emitted is equal to the quantity of antenna, and unrelated with the quantity of stream.Public RS has each antenna Independent RS.The frequency domain position and time-domain position of the public RS in subframe are independently determined with UE.Also it is independently generated with UE It will be multiplied by the public RS sequence of public RS.Therefore, all UE in cell can receive public RS.However, it is possible to according to small Area's identifier (ID) come determine the public RS in subframe position and public RS sequence.Therefore, public RS is also referred to as cell Peculiar RS.
More specifically, can be determined in subframe according to the quantity of antenna number and the OFDM symbol in resource block The time-domain position of public RS.It can be according to antenna number, cell ID, OFDM symbol index l, time-gap number in radio frames etc. To determine the frequency domain position of the public RS in subframe.
Public RS sequence can be used in a subframe on the basis of OFDM symbol.Public RS sequence can be with cell ID, time-gap number in a radio frame, OFDM symbol index in a slot, CP type etc. and change.
In the OFDM symbol for including reference symbol, the quantity of the reference symbol for each antenna is 2.Because of subframe It in a frequency domain include NDLA resource block, so the quantity of the reference symbol for each antenna is 2 in an OFDM symbol ×NDL.Therefore, public RS sequence has 2 × N of lengthDL。
When r (m) indicates public RS sequence, equation 1 shows the example for being used as the sequence of complex numbers of r (m).
Equation 1
Here, nsIndicate the time-gap number in radio frames, and l indicates OFDM symbol number in a slot.M is 0, 1,...,2Nmax,DL-1。Nmax,DLIndicate the quantity of resource block corresponding with maximum bandwidth.For example, in LTE system, NMax, DLIt can To be 110.C (i) indicates PN sequence, and can be by the gold sequence definition with length 31.Equation 2 is shown with length 2 ×NMax, DLSequence c (i) example.
Equation 2
C (n)=(x1(n+Nc)+x2(n+Nc))mod 2
x1(n+31)=(x1(n+3)+x1(n))mod 2
x2(n+31)=(x2(n+3)+x2(n+2)+x1(n+1)+x1(n))mod 2
Here, NCIt is 1600, x1(i) the first m-sequence, and x are indicated2(i) the second m-sequence is indicated.For example, can basis For the cell ID of each OFDM symbol, time-gap number in a radio frame, OFDM symbol index in a slot, CP class Type etc. initializes the first m-sequence or the second m-sequence.Equation 3 shows the PN sequence c of initializationinitExample.
Equation 3
Here, NCPIt is 1 in the case where normal CP, and is 0 in the case where extending CP.
Generated public RS sequence is mapped to resource element.Equation 4, which is shown, is mapped to resource element for public RS sequence The example of element.Public RS sequence can be mapped in time slot nsIn be used for antenna p complex-value modulation symbol aK, l (P)。
Equation 4
K=6m+ (v+vshift)mod6
Here, defining υ and υ by the frequency domain position for different RSshift.υ can be provided as shown in eq 5.
Equation 5
The distinctive frequency displacement υ of cell can be defined as shown in equation 6shif。
Equation 6
Meanwhile having than Nmax,DLIn the system of small bandwidth, only it may be selected and used with 2 × N of lengthmax,DLIt generates RS sequence certain a part.
Now, dedicated RS will be described.
Fig. 9 shows the exemplary structure of dedicated RS when using normal CP in subframe.Figure 10 is shown when using extension The exemplary structure of dedicated RS when CP in subframe.
With reference to Fig. 9 and 10, when using normal CP, a TTI includes 14 OFDM symbols.When using CP is extended, one A TTI includes 12 OFDM symbols.Here, R5 indicates to emit the reference symbol of the antenna #5 of dedicated RS.When using normal CP, In OFDM symbol for including reference symbol, reference symbol is positioned with the interval of 4 subcarriers.CP is extended when using When, in OFDM symbol for including reference symbol, reference symbol is positioned with the interval of 3 subcarriers.
The quantity of the dedicated RS emitted is equal to the quantity of stream.When BS is by executing Wave beam forming for downlink information When to emit downlink information to particular UE, dedicated RS can be used.Can in data area rather than control area Zhong Bao Include dedicated RS.The resource block that PDSCH is mapped to can be used to emit dedicated RS.I.e., it is possible to by distributing to particular UE PDSCH emits the dedicated RS for particular UE.
The frequency domain position and time domain that can determine the dedicated RS in subframe according to the resource block for PDSCH transmitting distribution Position.Can be determined according to UE ID will be multiplied by the dedicated RS sequence of dedicated RS.In this case, only spy corresponding with UE ID Determining UE can receive dedicated RS.Therefore, dedicated RS is also referred to as the distinctive RS of UE.
More specifically, can according in radio frames time-gap number and CP type determine the dedicated RS's in subframe Time-domain position.L, CP type etc. can be indexed according to the resource block, cell ID, OFDM symbol for PDSCH transmitting distribution to determine The frequency domain position of dedicated RS in subframe.
Public RS and dedicated RS can be used simultaneously.For example it is assumed that 3 OFDM symbol (l of the first time slot in subframe =0,1,2) carry out emission control information.Public RS can be used come the OFDM symbol indexed with 0,1 and 2 (l=0,1,2).In addition to Dedicated RS can be used in remaining OFDM symbol except 3 OFDM symbols.
In the increased multiaerial system of wherein antenna configuration, need to be designed according to increased antenna configuration RS structure and Launch scenario.For example, can be sent out by following manner if antenna configuration increases to 8Tx system from existing 4Tx system It penetrates the RS of each antenna: being multiplexed the channel to identify 8 Tx antennas in time domain or frequency domain or code domain.For each antenna RS can be for each Tx antenna carry out channel measurement RS.Hereinafter, for carrying out channel to each Tx antenna The RS of measurement is referred to as channel quality measurement reference signal (or referred to as CQI RS).
The method that Figure 11 shows the transmitted reference signal in multi-antenna systems of embodiment according to the present invention.
Emit CQI RS (CRS) configuration indicator (step S101) to UE with reference to Figure 11, BS.CRS configuration indicator can be with Instruction can emit the wireless resource information of CQI RS (or CRS) in whole or in part, for example, in the son for wherein emitting CQI RS Frame, cycle information, time migration, the OFDM symbol in subframe and/or CRS configuration information, such as resource element, in subframe Resource element pattern, aerial information etc..
It can be such subframe in the subframe for wherein emitting CQI RS: not emitting primary synchronization channel (P- in the burst SCH), auxiliary synchronization channel (S-SCH) or Physical Broadcast Channel (BCH).OFDM symbol is synchronous or time slot is same for obtaining by P-SCH Step.P-SCH is located in the last OFDM symbol of time slot 0 and time slot 10.That is, emitting P-SCH in subframe 0 and subframe 5.S-SCH For obtaining frame synchronization.S-SCH is located at just in the OFDM symbol before the last OFDM symbol of time slot 0 and time slot 10.That is, Emit S-SCH in subframe 0 and subframe 5.The quantity that the OFDM symbol of P-SCH and S-SCH is disposed on its time slot or position is only used In exemplary purpose, and system can be depended on and differently changed.P-BCH is located in the subframe 0 in radio frames.P- BCH is used to obtain the basic system configuration information of BS.P-BCH can be emitted periodically.For example, P-BCH can have 40ms's Period.
CQI RS can be emitted periodically, and cycle information indicates its period.It is, for example, possible to use with 5,10,20 and 50 subframes corresponding period repeatedly emits CQI RS.Time migration indicates the subframe for emitting CQI RS for being scheduled Offset information.For example, if giving time migration, it can be in any one of subframe n+0, n+1, n+2, n+3 and n+4 Middle transmitting is scheduled in the CQI RS emitted in subframe n.
Whether aerial information instruction is used as about according to the peculiar RS of cell (that is, public RS) used in conventional systems CQI RS and the information for being additionally required the antenna of CQI RS.For example, the public RS used in the legacy system using 4 antennas It can be used as CQI RS in the new system using 8 antennas.In this case, it is additionally required the quantity of the antenna of CQI RS It can be different according to the quantity of the public RS used in conventional systems in 8 antennas the antenna being applied to.If passed The public RS that unites is only used for one of 8 antennas, then only needs CQI RS for 7 antennas.Alternatively, if traditional public RS is used for Two or four antenna then needs CQI RS for 6 or 4 antennas.Alternatively, the public affairs used in conventional systems need not be used Total RS can define CQI RS for 8 antennas.Although explained below is the example that 8 antennas define CQI RS, this hair It is bright without being limited thereto.Therefore, the present invention is readily applicable to the case where public RS of tradition is re-used as CQI RS.
Any one CQI RS configuration indicator for being used to indicate above- mentioned information can be broadcast to institute in the cell There is UE, and specific UE or UE group can be launched by L1/L2 signal.
BS emits CQI RS (that is, CRS) (step S102) to UE.It is described more fully below when BS emits CQI RS in son The radio resource that CQI RS is deployed in frame, that is, OFDM symbol and/or resource in the subframe for wherein deploying CQI RS Element, or the resource element pattern in subframe etc..
UE receives CQI RS, and measures the channel (step S103) of each Tx antenna.After channel measurement, UE is to BS Feed back the downlink channel metrical information (step S104) of such as channel quality indicator (CQI).
Now, description can be disposed to the resource element pattern and resource element of CQI RS in subframe.
CQI RS can be deployed to the radio resource other than the radio resource that public RS or dedicated RS are deployed to. In the case where normal CP, public RS can be emitted in OFDM symbol 0,4,7 and 11 in the transmitting using two antennas, and And in addition it can emit public RS in OFDM symbol 1 and 8 in the transmitting using four antennas.It can be in the time domain in OFDM Emitting dedicated RS on symbol 3,6,9 and 12, (this is only for exemplary purpose, therefore can also send out in other OFDM symbols Dedicated RS is penetrated, below and same).Therefore, CQI RS can be deployed in addition to public RS and dedicated RS are deployed to OFDM symbol except OFDM symbol 5,10 and 13 any one, and can optionally be deployed to OFDM symbol 8.
In the case where extending CP, can in the transmitting using two antennas OFDM symbol 0,3,6 and 9 in the time domain The middle public RS of transmitting, and in addition can emit public RS in OFDM symbol 1 and 7 in the transmitting using four antennas.It can To emit dedicated RS in OFDM symbol 4,7 and 10 in the time domain.Therefore, CQI RS can be deployed in addition to public RS and specially Symbol 5,8 and 11 except the OFDM symbol being deployed to RS.
Unlike above-mentioned example, the position of dedicated RS can be different with system.For example, when in such as lte-a system System in using dedicated RS can be deployed to OFDM symbol 5,6,12 and 13 when normal CP, and can when using CP is extended To be deployed to OFDM symbol 4,5,10 and 11.In such a case it is possible to CQI RS is deployed in addition to above-mentioned public RS and specially Radio resource except the radio resource being deployed to RS (for LTE-A).
CQI can be emitted by least one OFDM symbol that CQI RS is deployed in the OFDM symbol in subframe RS.In these OFDM symbols, CQI RS can be deployed to 4,6,8,12 or 16 resource elements.In the feelings of multiaerial system Under condition, need to identify the CQI RS of each antenna.This is in order to avoid the interference between the CQI RS of each antenna.For Frequency division multiplexing (FDM), time division multiplexing (TDM) or code division multiplexing (CDM) can be used in the CQI RS for identifying each antenna. In FDM, the CQI RS of each antenna is emitted by dividing in a frequency domain.In TDM, sent out by dividing in the time domain Penetrate the CQI RS of each antenna.In CDM, the CQI RS of each antenna is emitted by using different sequences.When logical When crossing using FDM and TDM via mutiple antennas transmitting RS, the resource element that the CQI RS of each antenna is deployed to is not weighed It is folded.When using CDM, the resource element that the CQI RS of each antenna is deployed to may be overlapped.
Now, it will sequentially describe to dispose CQI RS's to 4,6 or 8 resource elements in an OFDM symbol in subframe Example.In the case where normal CP, any one of OFDM symbol 5,8,10 and 13 can be selected as CQI RS.In extension CP In the case where, it can choose any one of OFDM symbol 5,8 and 11.In addition, according to the position of dedicated RS, in the feelings of normal CP It can choose any one of OFDM symbol 3,5,6,8,9,10,12 and 13 under condition, and can be in the case where the CP of extension Select any one of OFDM symbol 4,5,7,8,10 and 11.
It, can be from OFDM symbol 3,8,9 and 10 in the case where normal CP as the similarly deployment-specific RS with LTE-A CQI RS is selected in any one, and can be from any one selection of OFDM symbol 2,7 and 8 in the case where extending CP CQI RS。
Figure 12 is shown in an OFDM symbol to the example of four resource element deployment CQI RS.
With reference to Figure 12, CQI RS is disposed for four resource elements in resource area, the resource area is in the time domain It including an OFDM symbol, and in a frequency domain include 12 subcarriers.The resource element that CQI RS is deployed to can pass through Same distance is separated from each other to dispose.For example, money can be disposed by being separated from each other distance corresponding with three resource elements Source element.CQI RS can be disposed by identifying 8 antennas according to CDM or { CDM, TDM }.
For example, the CQI RS for being deployed to four resource elements can carry out CDM so as to identify 8 antennas.That is, by four A identical resource element carries out CDM using different codes so as to identify this 8 antennas.It is then possible in a subframe Middle transmitting is used for the CQI RS of 8 all antennas.In this case, the duty cycle can be 1.
Alternatively, CQI RS can be carried out to CDM so as to identify four antennas in a subframe, and can pass through 8 antennas are identified using two subframes configured in this way to emit CQI RS.For example, can be by subframe n (its In, n is integer) in execute CDM and emit the CQI RS for antenna 0,1,2 and 3, and can be by subframe n+k (its In, k is greater than or equal to 1 natural number) CDM is executed to emit the CQI RS for antenna 4,5,6 and 7.I.e., it is possible to by holding Row CDM and TDM emits CQI RS.In this case, the duty cycle can be 2.
Alternatively, CQI RS can be carried out to CDM so as to identify two antennas in a subframe, and can pass through 8 antennas are identified using 4 subframes configured in this way to emit CQI RS.For example, can be by being executed in subframe n CDM emits the CQI RS for antenna 0 and 1, and it is also possible to by executing respectively in subframe n+1, n+2 and n+3 CDM emits CQI RS for antenna 2 and 3, the CQI RS for antenna 4 and 5 and the CQI RS for antenna 6 and 7.At this In the case of, the duty cycle can be 4.Although being shown as example continuous subframes in the above example, the present invention is not It is limited to this.
Alternatively, the CQI RS for an antenna can be emitted in a subframe, so that by identifying using 8 subframes 8 antennas emit CQI RS.In this case, the duty cycle can be 8.
If it is assumed that the OFDM symbol (in the case where normal CP) of from 0 to 13 index subframe, then can incite somebody to action in subframe The OFDM symbol that CQI RS is deployed to can be any one of OFDM symbol 5,8,10 and 13 in the case where normal CP.Expanding In the case where the CP of exhibition, OFDM symbol can be any one of OFDM symbol 5,8 and 11.If similarly disposed with LTE-A Dedicated RS, then can be from any one selection CQI RS of OFDM symbol 3,8,9 and 10 in the case where normal CP, and is expanding It can be from any one selection CQI RS of OFDM symbol 2,7 and 8 in the case where the CP of exhibition.I.e., it is possible to which CQI RS is deployed to The OFDM symbol other than the OFDM symbol being deployed in addition to public RS and dedicated RS in subframe.It is disposed according to dedicated RS To which OFDM symbol, the OFDM symbol that CQI RS can be deployed to can differently change.
Although the case where illustrating 8 antenna identification CQI RS in the above example, the present invention is not limited to This.The traditional RS traditionally defined can be adapted at least one of mutiple antennas, also, CQI RS according to the present invention can be with Suitable for remaining antenna.For example, traditional RS can be used for antenna 0, and will be according to the present invention in antenna 0 to 8 CQI RS is used for antenna 1 to 7.
CQI RS can be applied in the following manner: the position of resource element of the displacement in the OFDM symbol of each cell It sets.Alternatively, can be fixed in whole cells in the position for wherein deploying the resource element of CQI RS.
Figure 13 shows the example for disposing two CQI RS to four resource elements in an OFDM symbol.
Different from Figure 12, two CQI RS are deployed to four resource elements in Figure 13.I.e., it is possible to two resource elements Element deployment CQI RS 1, and it is possible to dispose CQI RS 2 to remaining two resource elements.Can as shown in Figure 13 (a), Come to dispose CQI RS to resource element with the pattern that resource element is separated from each other identical resource element distance, and such as Figure 13 (b) shown in, to two continuous resource elements to deployment CQI RS and resource element is to being separated from each other specific resource Element is apart from such pattern.Alternatively, as shown in Figure 13 (c), resource element and CQI RS 2 that CQI RS 1 is deployed to The resource element being deployed to can have different resource element distances.It can be identified by using different basic sequences CQI RS 1 and CQI RS 2.
8 antennas can be identified by utilization { CDM, FDM } or { CDM, FDM, TDM } or { FDM, TDM } to dispose CQI RS 1 and CQI RS 2.
In the case where use { CDM FDM }, the CQI RS 1 of two resource elements deployment into four resource elements CDM can be carried out, so as to identify four antennas (for example, antenna 0 to 3), also, is disposed to remaining two resource elements CQI RS 2 can carry out CDM, so as to identify four antennas (for example, antenna 4 to 7).It is then possible in a subframe Middle transmitting is used for the CQI RS of all 8 antennas.
In the case where use { CDM, FDM, TDM }, CQI RS can carry out { CDM, FDM } so as in a subframe Four antennas of middle identification, and CQI can be emitted by identifying 8 antennas using two subframes configured in this way RS.For example, CQI RS 1 can carry out CDM so as to identify antenna 0 and 1 in subframe n (wherein, n is integer), also, CQI RS 2 can carry out CDM so as to identify antenna 2 and 3.As described above, CQI RS 1 and CQI RS 2 carries out FDM, because Different resource elements is assigned to for them.Subframe n+k (wherein, k be greater than or equal to 1 natural number) in, CQI RS 1 carries out CDM so as to identify antenna 4 and 5, also, CQI RS 2 can carry out CDM so as to identify antenna 6 and 7.? In this case, the duty cycle can be 2.
In the case where use { FDM TDM }, CQI RS 1 and CQI RS 2 can identify two in a subframe Antenna, and CQI RS 1 and CQI can be emitted by identifying 8 antennas using four subframes configured in this way RS 2.For example, can be respectively in subframe n for antenna 0 and antenna 1, in subframe n+1 for antenna 2 and antenna 3, in son CQI RS 1 and CQI RS 2 is used for antenna 4 and antenna 5 in frame n+2 and for antenna 6 and antenna 7 in subframe n+3. In this case, the duty cycle can be 4.Although illustrating continuous subframe in the above example, the present invention is unlimited In this.
Figure 14 shows the example for disposing four CQI RS to four resource elements in an OFDM symbol.
Different from Figure 13, four CQI RS are deployed to four resource elements in Figure 14.I.e., it is possible to four resource elements Each of element resource element one by one disposes CQI RS 1 to CQI RS 4.It can be such as institute in Figure 14 (a) and Figure 14 (c) Show, comes to dispose CQI RS to resource element with the pattern that resource element is separated from each other identical resource element distance, (that is, scheming The distance of 3 resource elements in 14 (a) and the distance of two resource elements in Figure 14 (c)), and can be to four companies Continuous resource element deployment CQI RS 1 is to CQI RS 4, as shown in Figure 14 (b).Can by using different basic sequences To identify CQI RS 1 to CQI RS 4.
8 antennas can be identified by utilization { CDM, FDM } or { FDM, TDM } to dispose CQI RS 1 to CQI RS 4.
In the case where use { CDM FDM }, each of CQI RS 1 to CQI RS 4 can carry out CDM, so as to energy It is enough to identify 8 antennas by identifying two antennas in a subframe.
In the case where use { FDM TDM }, 8 antennas can be identified in the following manner: the CQI RS 1 identified by FDM Identify four antennas (for example, antenna 0 to 3) in a subframe to CQI RS 4, and by the CQI RS 1 of FDM identification to CQI RS 4 identifies four antennas (that is, antenna 4 to 7) in another subframe.
Figure 15 shows the example that the CQI RS dispositions method described in Figure 14 is applied to subframe.
With reference to Figure 15, in the case where normal CP, CQI RS 1 to 4 is disposed to the OFDM symbol 13 of the second time slot.Expanding In the case where the CP of exhibition, CQI RS 1 to CQI RS 4 is disposed to the OFDM symbol 11 of the second time slot.That is, this is using such as Figure 14 (a) example in the resource element pattern for wherein disposing CQI RS described in.Although being not shown in Fig.15, this also can Resource element pattern applied to Figure 14 (b) and Figure 14 (c).In addition, though describing the last OFDM to subframe in Figure 15 The example of symbol application CQI RS 1 to CQI RS 4, but it is clear that it is suitable in addition to (or cell is peculiar by public RS ) or any one of the OFDM symbol except the OFDM symbol that is deployed to of dedicated RS RS.
Figure 16 is shown in an OFDM symbol to the example of 6 resource element deployment CQI RS.
With reference to Figure 16 (a), CQI RS is deployed to 6 resource elements in resource area, and the resource area is in time domain In include an OFDM symbol, and in a frequency domain include 12 subcarriers.The resource element that CQI RS is deployed to can lead to It crosses and is separated from each other identical resource element distance (that is, distance of two resource elements) to dispose.By using CDM or CDM, TDM } or { FDM, TDM } identify that 8 antennas dispose CQI RS.
For example, CDM can be carried out to the CQI RS that 6 resource elements are disposed in a subframe, so as to identify 8 Antenna.Alternatively, CQI RS can carry out CDM so as in a subframe identify 4 antennas, and can by utilize with Two subframes that this mode configures identify 8 antennas to emit CQI RS.For example, by subframe n (wherein, n is integer) CDM is executed to emit the CQI RS for antenna 0,1,2 and 3, and it is possible to by the way that (wherein, k is greater than or waits in subframe n+k In 1 natural number) CDM is executed to emit the CQI RS for antenna 4,5,6 and 7.I.e., it is possible to be sent out by executing CDM and TDM Penetrate CQI RS.
In the case where Figure 16 (a), the position that can dispose CQI RS can be shifted for each cell.For example, can To determine the position of resource element that CQI RS is deployed to by Modulo-two operation.In the case where Figure 16 (b) to Figure 16 (g), The position for the resource element that CQI RS is deployed to for each cell can be fixed as to same position, and the position Setting can change according to offset information.Offset information can provide for the starting position for being used as reference point with Resource element is the deviant of unit, and can indicate starting position by using index.For example, if Figure 16 (b) shows It is used as the starting position of reference position out, then can sets 1 in Figure 16 (c) for deviant, be set as in Figure 16 (d) 2, and 3 are set as in Figure 16 (e).Deviant can be arranged to different value as unit of cell or cell group.Alternatively, can To determine the position of resource element that CQI RS is deployed to by 6 operation of mould.
Figure 17 shows the example for applying the CQI RS dispositions method described in Figure 16.In this illustration, in Figure 16 (a) The CQI RS dispositions method of middle description is applied to last OFDM symbol.Different from Figure 17, if similarly disposed with LTE-A Any one of OFDM symbol 3,8,9 and 10 can be selected as CQI RS then in the case where normal CP by dedicated RS, and In the case where the CP of extension, any one of OFDM symbol 2,7 and 8 can be selected as CQI RS.
Now, example will be described, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, with CQI RS is disposed to 8 resource elements in the corresponding frequency band of one resource block.
Figure 18 shows an example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, CQI RS is disposed to 8 resource elements in frequency band corresponding with a resource block.
With reference to Figure 18, CQI RS 1 is deployed to 8 resource elements in resource area, and the resource area is in the time domain It including an OFDM symbol, and in a frequency domain include 12 subcarriers.The resource element that CQI RS 1 is deployed to it is each It is a to dispose in couples, and can be disposed by being separated by same distance.Here, CQI RS 1 can be use The CQI RS of one basic sequence.8 antennas can be identified by using CDM or { CDM, TDM } to dispose CQI RS 1.
For example, 8 resource elements that CQI RS 1 is deployed to can carry out CDM, so as to identify 8 antennas.That is, 8 identical resource elements carry out CDM using different codes, so as to identify this 8 antennas.In such a case it is possible to Subframe of the transmitting for all 8 antennas in one subframe.Duty cycle can be a subframe.
Alternatively, CQI RS 1 can carry out CDM, so as to identify 4 days in 8 resource elements in a subframe Line, and CQI RS 1 can be emitted by identifying 8 antennas using two subframes configured in this way.For example, can To emit the CQI RS for antenna 0,1,2 and 3 by executing CDM in subframe n, and by being executed in subframe n+1 CDM emits the CQI RS for antenna 4,5,6 and 7.I.e., it is possible to emit CQI RS by executing CDM and TDM.In the feelings Under condition, the duty cycle can be two subframes.
Alternatively, CQI RS 1 can carry out CDM so as to identify two days in 8 resource elements in a subframe Line, and CQI RS 1 can be emitted by identifying 8 antennas using two subframes configured in this way.For example, can To emit the CQI RS for antenna 0 and 1 by executing CDM in subframe n, and it is also possible to by subframe n+1, n CDM is executed in+2 and n+3 respectively come emit CQI RS for antenna 2 and 3, for antenna 4 and 5 CQI RS with for antenna 6 and 7 CQI RS.In this case, the duty cycle can be 4 subframes.
Alternatively, the CQI RS 1 for an antenna can be emitted in 8 resource elements in a subframe, so that logical It crosses and identifies 8 antennas using 8 subframes to emit the CQI RS 1 for an antenna.In this case, the duty cycle can be with It is 8 subframes.
If it is assumed that the OFDM symbol (in the case where normal CP) of from 0 to 13 index subframe, then the CQI RS in subframe 1 OFDM symbol that can be deployed to can be any one of OFDM symbol 5,8,10 and 13 in the case where normal CP.? In the case where the CP of extension, OFDM symbol can be any one of OFDM symbol 5,8 and 11.If the similarly portion with LTE-A Affix one's name to dedicated RS, then can in the case where normal CP from OFDM symbol 3,8,9 and 10 any one selection CQI RS, and It can be from any one selection CQI RS of OFDM symbol 2,7 and 8 in the case where the CP of extension.I.e., it is possible to which CQI RS is disposed The OFDM symbol not being deployed to RS public in subframe and dedicated RS.In addition, according to the position of deployment-specific RS, CQI RS 1 OFDM symbol that can be deployed to can differently change.
Figure 19 shows another example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, CQI RS is disposed to 8 resource elements in frequency band corresponding with a resource block.
With reference to Figure 19 (a) to 19 (e), CQI RS can be deployed to 8 continuous resource elements in a frequency domain.CQI The starting position for the resource element that RS can be deployed to can be fixed, and can change with offset information.Offset Information can provide the deviant as unit of resource element for the starting position for being used as reference point, and can To indicate starting position by using index.For example, if Figure 19 (a) shows the starting position with reference location, it can To set 1 in Figure 19 (b), 2 in Figure 19 (c), 3 in Figure 19 (d) and 4 in Figure 19 (e) for deviant. Different values can be set as unit of cell or cell group by deviant.
Figure 20 shows an example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, Two CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
With reference to Figure 20, CQI RS 1 is disposed to four resource elements, and dispose CQI RS 2 to other four resource element. Different basic sequences can be used in CQI RS 1 and CQI RS 2.Can by utilization { CDM and FDM } and CDM, FDM and TDM } 8 antennas are identified to dispose CQI RS 1 and CQI RS 2.
For example, four resource elements that CQI RS 1 is deployed to can carry out CDM, so as to identify 4 antenna (examples Such as, antenna 0,1,2 and 3), and four resource elements that CQI RS 2 is deployed to can carry out CDM so as to identify 4 Antenna (for example, antenna 4,5,6 and 7).That is, CQI RS 1 and CQI RS 2 can carry out FDM, also, CQI RS 1 and CQI RS 2 can carry out CDM.In such a case it is possible to CQI RS of the transmitting for all 8 antennas in a subframe.Work week Phase can be a subframe.
Alternatively, CQI RS 1 can carry out CDM so as to identify two in four resource elements in a subframe Antenna (for example, antenna 0 and 1), also, CQI RS 2 can carry out CDM, so as to the other four resource in same subframe Two antennas (for example, antenna 2 and 3) are identified in element.8 can be identified by using two subframes configured in this way Antenna emits CQI RS.For example, emitting CQI RS 1 by executing CDM for antenna 0 and 1, and lead in subframe n It crosses and CDM is executed for antenna 2 and 3 to emit CQI RS 2.In addition, in subframe n+1, it can be by being executed for antenna 4 and 5 CDM emits CQI RS 1, and can emit CQI RS 2 by executing CDM for antenna 6 and 7.I.e., it is possible to by holding Row CDM, TDM and FDM emit CQI RS.In this case, the duty cycle can be two subframes.
Alternatively, CQI RS 1 can be disposed so as to identify a day in four resource elements in a subframe Line, and it is possible to dispose CQI RS 2 so as to identify another antenna in the other four resource element in same subframe. 8 antennas can be identified by using four subframes configured in this way to emit CQI RS.For example, in subframe n, it can Emit CQI RS 1 and CQI RS 2 to execute FDM to antenna 0 and antenna 1 respectively by execution.It, can be in subframe n+1 Emit CQI RS 1 and CQI RS 2 by executing FDM to antenna 2 and antenna 3 respectively.It, can be by dividing in subframe n+2 It is other that FDM is executed to antenna 4 and antenna 5 to emit CQI RS 1 and CQI RS 2.It, can be by respectively to day in subframe n+3 Line 6 and antenna 7 execute FDM to emit CQI RS 1 and CQI RS 2.In this case, the duty cycle can be 4 subframes.
Figure 21 shows other examples, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, Two CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
With reference to Figure 21 (a), 8 resource elements are deployed to the resource element being deployed to of CQI RS 2 and CQI RS 1 Resource element sequence it is repeatedly continuous.With reference to Figure 21 (b), there are four continuous resource members that CQI RS 2 is deployed to Element, and then, there are four continuous resource elements that CQI RS 1 is deployed to.The resource element that CQI RS is deployed to Starting position can be fixed, and can change with offset information.Offset information can be provided relative to being used as The deviant as unit of resource element for the starting position of reference point, and can indicate to start by using index Position.Although it is not shown, deviant can be set to any one of value 1 to 4.It can be as unit of cell or cell group To determine deviant.
Figure 22 shows another example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, 4 CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
With reference to Figure 22, each of CQI RS 1 to CQI RS 4 is deployed to two resource elements in resource area Element, the resource area include an OFDM symbol in the time domain, and in a frequency domain include 12 subcarriers.CQI RS 1 to Different basic sequences can be used in CQI RS 4.8 antennas can be identified by utilization { CDM and FDM } or { FDM and TDM } To dispose CQI RS 1 to CQI RS 4.
For example, two resource elements that CQI RS 1 is deployed to can carry out CDM, so as to identify two antennas (for example, antenna 0 and 1), also, two resource elements that CQI RS 2 is deployed to can carry out CDM so as to identify two A antenna (for example, antenna 3 and 4).Equally, each of CQI RS 3 and CQI RS 4 can also carry out CDM so as to know Other two antennas.That is, CQI RS 1 to CQI RS 4 can carry out FDM, and each of CQI RS 1 to CQI RS 4 can To carry out CDM.In such a case it is possible to CQI RS of the transmitting for all 8 antennas in a subframe.Duty cycle can be with It is a subframe.
Alternatively, each of CQI RS 1 to CQI RS 4 carries out FDM, so as to two resources in a subframe In CQI RS is emitted for antenna, and can be by identifying 8 antennas using two subframes that configure in this way To emit CQI RS.For example, CQI RS 1 to CQI RS 4 can carry out FDM in subframe n, so as to respectively for antenna 0 to 3 identification CQI RS.In subframe n+1, CQI RS 1 to CQI RS 4 can carry out FDM, allow to respectively for antenna 4 to 7 identification CQI RS.I.e., it is possible to emit CQI RS by executing FDM and TDM.In this case, the duty cycle can be two Subframe.
Figure 23 shows other examples, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, 4 CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
With reference to Figure 23 (a), any one four resource element being deployed to of CQI RS 1 to CQI RS 4 are continuous It disposes twice.With reference to Figure 23 (b), the starting position for disposing CQI RS is different from Figure 23 (a).Dispose the resource element of CQI RS Starting position can be fixed, and can change with offset information.Offset information can be provided relative to being used as The deviant as unit of resource element for the starting position of reference point, and can indicate to start by using index Position.Although it is 1 as shown in Figure 23 (b) that deviant, which is shown here, deviant be can be set in value 1 to 4 Any one.Deviant can be determined as unit of cell or cell group.With reference to Figure 23 (c), continuously dispose CQI RS 1 to Any one four resource element being deployed to of CQI RS 4, and dispose what CQI RS was deployed to by being separated from each other Four resource elements.Figure 23 (c) shows example, wherein disposes CQI RS by being separated from each other the distance of two resource elements Four resource elements being deployed to.Alternatively, it is every to dispose to be expressed as the distance by being separated from each other 6 resource elements The resource element that a CQI RS is deployed to.Figure 23 (d) shows the resource element that the CQI RS to make comparisons with Figure 23 (c) is deployed to The different starting positions of element.
Figure 24 shows another example, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, 8 CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
With reference to Figure 24, each of CQI RS 1 to CQI RS 7 is deployed to a resource element in resource area Element, the resource area include an OFDM symbol in the time domain, and in a frequency domain include 12 subcarriers.CQI RS 1 to Different basic sequences can be used in CQI RS 7.8 antennas are identified by using FDM to dispose CQI RS 1 to CQI RS 7.CQI RS for two antennas is deployed to continuous resource element.By be separated from each other the distance of a resource element come Dispose continuous two resource elements.
Figure 25 shows other examples, wherein emit CQI RS in an OFDM symbol in subframe, and wherein, 8 CQI RS are disposed to 8 resource elements in frequency band corresponding with a resource block.
Figure 25 (a) and Figure 25 (b) shows the company being deployed in the presence of any one of such as CQI RS 1 to CQI RS 7 The case where continuous resource element.Figure 25 (b) shows an example, wherein makes comparisons with Figure 25 (a), CQI RS is deployed to The starting position of resource element is shifted deviant 1.Although be shown here deviant 1 be 1 as shown in Figure 25 (b), Deviant can be set to any one of value 1 to 4.Alternatively, being four CQI as shown in Figure 25 (c) and Figure 25 (d) Four resource elements of RS distribution are continuously, and it is possible to dispose the two resource elements by being separated from each other.
Figure 26 shows the example that the CQI RS dispositions method described in Figure 22 is applied to subframe.
It, can be in the last OFDM symbol of subframe, that is, in the case where normal CP in OFDM symbol 13 with reference to Figure 26 And emit CQI RS in OFDM symbol 11 in the case where the CP of extension.It can be by being held in the last OFDM symbol of subframe Row FDM emits four CQI RS (that is, CQI RS 1 to CQI RS 4).
Figure 27 shows the example that the CQI RS dispositions method described in Figure 24 is applied to subframe.
It, can be in the last OFDM symbol of subframe, that is, in the case where normal CP in OFDM symbol 13 with reference to Figure 27 And emit CQI RS in OFDM symbol 11 in the case where the CP of extension.It can be by being held in the last OFDM symbol of subframe Row FDM emits 8 CQI RS (that is, CQI RS 1 to CQI RS 8).
Figure 28 to Figure 33 shows the example for disposing 8 CQI RS to 8 resource elements in subframe.
With reference to Figure 28 to Figure 33, dedicated RS can be emitted in OFDM symbol 5,6,12 and 13 in the case where normal CP, And dedicated RS can be emitted in OFDM symbol 4,5,10 and 11 in the case where the CP of extension.In addition, in the feelings of normal CP Public RS can be emitted under condition in OFDM symbol 0,4,7 and 11, and can be in OFDM symbol in the case where the CP of extension 0, emit public RS in 3,6 and 9.It in this case, can be in any of OFDM symbol 3,8,9 and 10 in the case where normal CP Emit CQI RS in one, and CQI can be emitted in any one of OFDM symbol 7 and 8 in the case where the CP of extension RS。
Figure 28 and Figure 30 is shown for example emits CQI RS and in extension in the case where normal CP in OFDM symbol 10 The case where emitting CQI RS in the case where CP in OFDM symbol 8.Figure 28 and 29 is in CQI RS 1 to CQI RS 8 in CQI RS Pattern having the same is (that is, following patterns: wherein there are two companies that CQI RS is deployed in the OFDM symbol being launched into Continuous resource element, and the two resource elements are separated from each other the distance of a resource element) in the sense that be it is common, still It is different from each other in the sense that the starting position for the resource element that CQI RS is deployed to is different.
Figure 30 to Figure 33 is having the same in the OFDM symbol that CQI RS is launched into CQI RS 1 to CQI RS 8 It is common in the sense that pattern (that is, following patterns: wherein there are 8 continuous resource elements that CQI RS is deployed to), but It is in the sense that OFDM symbol that CQI RS is launched into is different is different from each other.That is, Figure 30 shows following situations: its In, for example, emitting CQI RS in OFDM symbol 10 in the case where normal CP, and in OFDM in the case where the CP of extension Emit CQI RS in symbol 8.Figure 31 shows following situations: where for example, sending out in OFDM symbol 9 in the case where normal CP CQI RS is penetrated, and emits CQI RS in OFDM symbol 8 in the case where the CP of extension.Figure 32 shows following situations: where For example, emitting CQI RS in OFDM symbol 8 in the case where normal CP, and in OFDM symbol in the case where the CP of extension Emit CQI RS in 7.Figure 33 shows following situations: where for example, emitting CQI in OFDM symbol 3 in the case where normal CP RS, and emit CQI RS in OFDM symbol 2 in the case where the CP of extension.It, can be by CQI in Figure 28 into Figure 33 FDM is executed in the OFDM symbol that RS is launched into emit CQI RS 1 to CQI RS8.
Described above is the examples for disposing CQI RS in the OFDM symbol in subframe to 4,6 or 8 resource elements.It is existing By description to the example of 4,8,12 or 16 resource element deployment CQI RS in two OFDM symbols in subframe.
For CQI RS, two OFDM symbols can be selected from OFDM symbol 5,8,10 and 13 in the case where normal CP. If two selected OFDM symbols are expressed as such as OFDM symbol index to (x, y), it can be (5,8), (5, 10), any one of (5,13), (8,10), (8,13) and (10,13).It, can be from OFDM symbol in the case where the CP of extension 5,8 and 11 two OFDM symbols of selection, and it can be any one of (5,8), (5,11) and (8,11).In addition, according to The position of dedicated RS can select any two from OFDM symbol 3,5,6,8,9,10,12 and 13 in the case where normal CP OFDM symbol, and any two OFDM symbol can be selected from OFDM symbol 4,5,7,8,10 and 11 in the case where the CP of extension Number.If the similarly deployment-specific RS with LTE-A, for CQI RS, in the case where normal CP can from OFDM symbol 3, 8,9 and 10 selection any two OFDM symbol, also, can select to appoint from OFDM symbol 2,7 and 8 in the case where the CP of extension What two OFDM symbol.
Figure 34 shows multiple examples, wherein emit CQI RS in two OFDM symbols in subframe, and wherein, CQI RS is disposed to four resource elements in frequency band corresponding with a resource block.
Four resource elements into resource area dispose CQI RS, which includes two OFDM symbols in the time domain Number (here, each OFDM symbol may include in different resource blocks), and in a frequency domain include 12 subcarriers.Such as Figure 34 (a), (b) or (d) shown in, can be deployed to by being separated from each other identical resource element distance to dispose CQI RS Resource element.For example, resource element can be disposed by being separated from each other the distance of 6 resource elements.Alternatively, such as Figure 34 (c) resource element that CQI RS is deployed to shown in can be deployed to two continuous resources in an OFDM symbol Element.
8 antennas can be identified by using CDM or { CDM, TDM } to dispose CQI RS.For example, to four resource elements The CQI RS of deployment can carry out CDM, so as to identify 8 antennas.It is then possible to which transmitting is for owning in a subframe The CQI RS of 8 antennas.In this case, the duty cycle can be 1.
Alternatively, CQI RS can carry out CDM so as to identify four antennas in a subframe, and can be by making 8 antennas are identified with two subframes configured in this way to be launched.For example, can be by the way that in subframe n, (wherein, n is whole Number) in execute CDM and emit the CQI RS for antenna 0,1,2 and 3, and can be by the way that in subframe n+k, (wherein, k is greater than Or the natural number equal to 1) CDM is executed to emit the CQI RS for antenna 4,5,6 and 7.I.e., it is possible to by executing CDM and TDM To emit CQI RS.In this case, the duty cycle can be 2.
Alternatively, CQI RS can be carried out CDM so as to identify two antennas in a subframe, and can pass through 8 antennas are identified using 4 subframes configured in this way to emit CQI RS.For example, can be by being executed in subframe n CDM emits the CQI RS for antenna 0 and 1, and it is also possible to by executing respectively in subframe n+1, n+2 and n+3 CDM emits CQI RS for antenna 2 and 3, the CQI RS for antenna 4 and 5 and the CQI RS for antenna 6 and 7.The feelings Under condition, the duty cycle can be 4.Although showing continuous subframes in the above example, but the invention is not restricted to this.For The position that each cell can dispose CQI RS can be shifted.For example, can determine CQI RS by mould 3 or 6 operations The starting position for the resource element being deployed to.Alternatively, CQI RS can be deployed to the resource of frequency domain identical with public RS Element.
Figure 35 shows the example for disposing two CQI RS to four resource elements in two OFDM symbols.
Different from Figure 34, two CQI RS are deployed to four resource elements in Figure 35.I.e., it is possible to by CQI RS 1 Two resource elements for including in an OFDM symbol are affixed one's name to, and it is possible to be deployed to CQI RS 2 in remaining OFDM Two resource elements for including in symbol.It can be separated from each other as shown in Figure 35 (a), (b) and (d) with resource element identical CQI RS is deployed to resource element by the pattern of resource element distance, and can be as shown in Figure 35 (c), with CQI RS deployment To pattern as two continuous resource elements.The same resource element of frequency domain is deployed in CQI RS 1 and CQI RS 2 This meaning figure 3 above 5 (d) is different from Figure 35 (a) and (b).
8 antennas can be identified by using { CDM, TDM } to dispose CQI RS 1 and CQI RS 2.
In the case where use { CDM TDM }, CQI RS 1 can be carried out to CDM so as to identify four antenna (examples Such as, antenna 0 to 3), also, CQI RS 2 can also be carried out to CDM so as to identify four antennas (that is, antenna 4 to 7).So Afterwards, the CQI RS for all 8 antennas can be emitted in a subframe.In this case, the duty cycle can be 1.
Each of CQI RS 1 and CQI RS 2 can carry out CDM so as to identify two days in a subframe Line, and 8 antennas can be identified by using two frames configured in this way to be launched.For example, CQI RS 1 can To carry out CDM so as to identify antenna 0 and 1 in subframe n (wherein, n is integer), and CQI RS 2 can carry out CDM So as to identify antenna 2 and 3.Subframe n+k (wherein, k be greater than or equal to 1 natural number), CQI RS 1 carry out CDM with Just antenna 4 and 5 can be identified, also, CQI RS 2 can carry out CDM so as to identify antenna 6 and 7.In this case, work It can be 2 as the period.
Alternatively, each of CQI RS 1 and CQI RS 2 can identify an individual antenna in a subframe, and And 8 antennas can be identified by using four subframes configured in this way to be launched.For example, in subframe n, CQI RS 1 and CQI RS 2 may be respectively used for antenna 0 and antenna 1, use in subframe n+1 for antenna 2 and antenna 3, in subframe n+2 In antenna 4 and antenna 5 and in subframe n+3 be used for antenna 6 and antenna 7.In this case, the duty cycle can be 4.Although Continuous subframe is illustrated in the above example, and but the invention is not restricted to this.
Figure 36 shows the example for disposing four CQI RS to four resource elements in two OFDM symbols.
In Figure 36, four CQI RS are disposed to four resource elements.That is, one by one each into four resource elements A resource element disposes CQI RS 1 to CQI RS 4.8 antennas can be identified by using { CDM, FDM, TDM } to dispose CQI RS 1 to CQI RS 4.
For example, each of CQI RS 1 to CQI RS 4 can carry out CDM so as to pass through knowledge in a subframe Other two antennas identify 8 antennas (duty cycle 1).Alternatively, 8 antenna (duty cycles can be identified in the following manner 2): 4 antennas (for example, antenna 0 to 3) are identified in a subframe by the CQI RS 1 to CQI RS 4 that FDM is identified, and Other four antenna (that is, antenna 4 to 7) is identified in another subframe.
Figure 37 shows the example for disposing four CQI RS in two OFDM symbols in subframe to four resource elements.
Can in an OFDM symbol to each deployment CQI RS of two continuous resource elements, such as Figure 37 (a) and (b) shown in.The resource element deployment CQI RS that can be separated to each other, as shown in Figure 37 (c) and (d).
Figure 38 shows an example, wherein disposes CQI to four resource elements in two OFDM symbols in subframe RS, wherein CQI RS is deployed to the resource element pattern having the same of each OFDM symbol.
CDM can be used to allow the CQI RS disposed to four resource elements that can identify 8 antennas.Alternatively, can be with It uses { CDM, TDM }, allows to any one middle identification antenna 0 to 3 in two OFDM symbols, and can be remaining Antenna 4 to 7 is identified in any one of OFDM symbol.Alternatively, can be by using to two OFDM symbol portions in subframe n The CQI RS of administration identifies antenna 0 to 3, and can by using the CQI disposed to two OFDM symbols in subframe n+k RS identifies antenna 4 to 7.
Figure 39 shows an example, wherein two CQI RS are deployed to four in two OFDM symbols in subframe A resource element.
With reference to Figure 39, CQI RS 1 is disposed to two resource elements in an OFDM symbol, and in another OFDM CQI RS 2 is disposed to two resource elements in symbol.Different basic sequences can be used in CQI RS 1 and CQI RS 2.It is logical It crosses and identifies 8 antennas using TDM or { CDM, TDM } to dispose CQI RS 1 and CQI RS 2.
In the case where TDM, each of CQI RS 1 and CQI RS 2 can identify an antenna in a subframe (that is, two antennas in total), and 8 antennas can be identified by using four subframes configured in this way.? In the case where { CDM, TDM }, in a subframe, CDM can be executed, so that CQI RS 1 identifies antenna 0 and 1, and CQI RS 2 identifies antenna 2 and 3, and in another subframe configured in a similar way, CDM can be executed, so that CQI RS 1 identification antenna 4 and 5, and CQI RS 2 identifies antenna 6 and 7 (duty cycle 2).Alternatively, CDM can be executed, so that at one In subframe, CQI RS 1 identifies antenna 0 to 3, and CQI RS 2 identifies antenna 4 to 7 (duty cycle 1).In order to avoid in phase The interference between CQI RS in adjacent cell can shift each cell the position of deployment CQI RS.In the situation Under, the starting position (that is, position of resource element) of deployment CQI RS can be determined by mould 3 or 6 operations.
Figure 40 shows the example for disposing four CQI RS in two OFDM symbols in subframe to four resource elements.
If each CQI RS is only used for an antenna in a subframe, 4 antennas can be identified.Therefore, may be used To provide the CQI RS (duty cycle 2) for 8 antennas by using two subframes.Alternatively, if by a son CDM is executed in frame makes each CQI RS for two antennas, then all 8 antenna (work can be identified in a subframe Period 1).
Figure 41 shows an example, wherein emit CQI RS in two OFDM symbols in subframe, and wherein, CQI RS is disposed to 8 resource elements in frequency band corresponding with a resource block.
With reference to Figure 41,8 resource elements into resource area dispose CQI RS 1, which includes in the time domain Two OFDM symbols, and in a frequency domain include 12 subcarriers.It can be by being separated from each other same distance, such as separate 3 The distance of resource element disposes each resource element that CQI RS 1 is deployed to.
8 antennas can be identified by using CDM or { CDM and TDM } to dispose CQI RS1.For example, by executing CDM, 8 resource elements that CQI RS 1 is deployed to can identify 8 antennas.That is, 8 identical resource elements with different codes into Row CDM is so as to identify 8 antennas.In such a case it is possible to CQI of the transmitting for all 8 antennas in a subframe RS (duty cycle 1).
Alternatively, CQI RS 1 can carry out CDM so as to identify four days in 8 resource elements in a subframe Line, and 8 antennas can be identified by using two subframes configured in this way to be launched.For example, by son CDM is executed in frame n to emit the CQI RS for antenna 0,1,2 and 3, and can be sent out by executing CDM in subframe n+1 Penetrate the CQI RS for antenna 4,5,6 and 7.That is, emitting CQI RS (duty cycle 2) by executing CDM and TDM.
Alternatively, CQI RS 1 can carry out CDM so as to identify two days in 8 resource elements in a subframe Line, and 8 antennas can be identified by using four subframes configured in this way to be launched.For example, by son CDM is executed in frame n to emit the CQI RS for antenna 0 and 1, and it is also possible to by subframe n+1, n+2 and n+3 Execute CDM respectively to emit CQI RS for antenna 2 and 3, the CQI RS for antenna 4 and 5 and the CQI for antenna 6 and 7 RS (duty cycle 4).
Figure 42 is shown in two OFDM symbols in subframe to other examples of 8 resource element deployment CQI RS.Such as Shown in Figure 42 (a), CQI RS can be deployed to continuous resource element.It can be with two continuous resource elements to each other The pattern separated disposes CQI RS, as shown in Figure 42 (b).The starting position for the resource element that CQI RS is deployed to can be with For each cell difference.
Figure 43 shows the example for disposing two CQI RS in two OFDM symbols in subframe to 8 resource elements.Often One CQI RS can be deployed to the resource element of the identical frequency band in two OFDM symbols as shown in Figure 43 (a), and The resource element of different frequency bands can be deployed to as shown in Figure 43 (b).
If each of CQI RS 1 and CQI RS 2 are used in an antenna in a subframe, can identify And two antennas are used, and can come by using four subframes configured in this way using 8 antenna (duty cycles 4).Alternatively, if each of CQI RS 1 and CQI RS 2 can carry out CDM so as to identify two in a subframe Antenna can then identify and use 4 antennas.If can identify 8 days using two subframes configured in this way Line (duty cycle 2).Alternatively, if each of CQI RS 1 and CQI RS 2 carry out CDM so as in a subframe It identifies 4 antennas, then can identify 8 antennas (duty cycle 1).
Figure 44 shows the example for disposing two CQI RS in two OFDM symbols in subframe to 8 resource elements.Figure 44 (a) show an example, wherein CQI RS 1 and CQI RS 2 is deployed to the same resource element in two OFDM symbols Plain (in a frequency domain).Figure 44 (b) shows an example, wherein CQI RS is deployed to different resource element in a frequency domain.Figure 44 (c) show an example, wherein and CQI RS 1 and CQI RS 2 is deployed to same resource element in a frequency domain, and Each CQI RS is deployed to the resource element for being separated from each other the distance of 6 resource elements.It is disposed in each CQI RS Figure 44 (d) is different from Figure 44 (b) in the sense that the resource element for being separated from each other 6 resource elements.The spy of Figure 44 (e) and (f) Sign is that only one CQI RS is deployed to an OFDM symbol.That is, OFDM symbol and CQI RS that CQI RS 1 is deployed to The 2 OFDM symbol differences being deployed to.
Figure 45 to Figure 47 shows in two OFDM symbols in subframe and disposes showing for four CQI RS to 8 resource elements Example.
Different resource elements can be respectively allocated by (being based on FDM) usually to identify as shown in Figure 45 to Figure 47 Four CQI RS of administration.Different basic sequences can be used to CQI RS 4 by CQI RS 1.Can by using CDM and TDM } 8 antennas are identified to dispose CQI RS 1 to CQI RS 4.
For example, two resource elements that CQI RS 1 can be deployed to carry out CDM so as to identify two antennas (for example, antenna 0 and 1), and two resource elements that CQI RS 2 is deployed to can also carry out CDM so as to identify two A antenna (for example, antenna 2 and 3).CQI RS 3 is allowed to identify antenna 4 and 5, and CQI RS it is also possible to execute CDM 4 can identify antenna 6 and 7, and thus, it is possible to can identify two antennas respectively for each CQI RS.That is, CQI RS 1 to CQI RS 4 carries out FDM, and each of CQI RS 1 to CQI RS 4 can carry out CDM.In such a case it is possible to one Transmitting is used for the CQI RS of all 8 antennas in a subframe.Duty cycle can be a subframe.
It is used in two resource elements in a subframe alternatively, each of CQI RS 1 to CQI RS 4 can be used as It is launched in the CQI RS of an antenna, and can identify 8 days by using two subframes configured in this way Line is launched.For example, can identify CQI RS 1 to CQI RS 4 respectively for antenna 0 to 3 in subframe n.In subframe n+ In 1, CQI RS 1 can be identified to CQI RS 4 respectively for antenna 4 to 7.I.e., it is possible to emit CQI by executing TDM RS.In this case, the duty cycle can be two subframes.
In Figure 45, the resource that each CQI RS is deployed to is disposed by being separated from each other same distance in a frequency domain Element.On the other hand, in figures 4-6 can, the continuous resource element of 4 into frequency domain disposes each CQI RS.In Figure 47, Two continuous resource elements into frequency domain dispose two CQI RS, and by remaining two CQI RS be deployed to by with this Two continuous resource elements are spaced and two continuous resource elements positioning.
As shown in Figure 46 (c) and Figure 47 (c), two CQI RS (that is, CQI RS 1 and CQI RS 3) can be disposed Remaining one is deployed to an OFDM symbol, and by remaining two CQI RS (that is, CQI RS 2 and CQI RS 4) OFDM symbol.Alternatively, four CQI RS can be deployed to an OFDM symbol such as Figure 45 into Figure 47 and as shown in other accompanying drawings Number.
As shown in Figure 45 (a), Figure 46 (a) and Figure 47 (a), in each OFDM symbol, each CQI RS can be with It is deployed to same resource element in a frequency domain, and as shown in other accompanying drawings of the Figure 45 into Figure 47, each CQI RS can be deployed to the different resource element in frequency domain.
Figure 48 shows an example, wherein emits CQI RS in two OFDM symbols in subframe, and wherein, to 8 A resource element disposes four CQI RS.
With reference to Figure 48, each of two CQI RS is deployed to two resource elements in resource area, the resource Region includes an OFDM symbol in the time domain, and includes in a frequency domain 12 subcarriers, and including matching in this way Two OFDM symbols set.Different basic sequences can be used to CQI RS 4 by CQI RS 1.Can by using CDM and TDM } 8 antennas are identified to dispose CQI RS 1 to CQI RS 4.
It, can be with for example, if each of CQI RS 1 to CQI RS 4 in a subframe is used for an antenna 8 antennas (duty cycle 2) are identified by using two subframes.Alternatively, if CQI RS 1 to CQI in a subframe Each of RS 4 carries out CDM and then by two antennas of identification come using then by identifying 8 using only a subframe A antenna (duty cycle 1).Two resource elements that CQI RS 1 is deployed to can carry out CDM, so as to identify two Antenna (for example, antenna 0 and 1), and two resource elements that CQI RS 2 is deployed to can carry out CDM so as to identify Two antennas (for example, antenna 3 and 4).Equally, each of CQI RS 3 and CQI RS 4 are also to carry out CDM so as to know Other two antennas.That is, CQI RS 1 to CQI RS 4 can carry out FDM, and each of CQI RS 1 to CQI RS 4 can To carry out CDM.In such a case it is possible to which transmitting is used for the CQI RS of all 8 antennas in a subframe.
Figure 49 shows another example, wherein emit CQI RS in two OFDM symbols in subframe, and wherein, Four CQI RS are disposed to 8 resource elements.In Figure 49 (a), two CQI RS are disposed to four continuous resource elements.? In Figure 49 (b), to the two continuous resource elements and other two continuous resource element portion for separating specific resource element distance Affix one's name to two CQI RS.The starting position for the resource element that CQI RS is deployed to can be fixed, and can be with deviant And it shifts.In Figure 49 (b), deviant can be set to any one of value 1 to 4.
Figure 50 and Figure 51 shows multiple examples, wherein emits CQI RS, and its in two OFDM symbols in subframe In, 8 CQI RS are disposed to 8 resource elements.
With reference to Figure 50, a resource element into resource area disposes each of 8 CQI RS, which exists Include two OFDM symbols in time domain, and in a frequency domain includes 12 subcarriers.CQI RS 1 to CQI RS 8 can be used Different basic sequences.Each of CQI RS 1 to CQI RS 8 can be used for an antenna, and thus, it is possible to identify 8 days Line.It can be deployed to by separating identical resource element distance (that is, distance of 3 resource elements) to position CQI RS Resource element.In Figure 51 (a), the resource element that CQI RS 1 is deployed to CQI RS 8 is continuously positioned in a frequency domain. In such a case it is possible to CQI RS be disposed by the distance for shifting 4 resource elements in each cell, so that at three The resource element that CQI RS in continuous cell is deployed to is not overlapped.In Figure 51 (b), to separating specific resource element The continuous resource element of two of distance and the continuous resource element of another two dispose four CQI RS, and there are two with this The OFDM symbol that kind mode configures.In such a case it is possible to by the way that CQI RS to be shifted to two resource elements in each cell The distance of element disposes CQI RS.It is possible to prevent the resource element weight that CQI RS is deployed in three continuous cells It is folded.
Figure 52 to Figure 64 shows multiple examples, wherein emit CQI RS in two OFDM symbols of resource area, and Wherein, 8 CQI RS are disposed to 8 resource elements, wherein resource area includes a subframe in the time domain, and in frequency domain In include 12 subcarriers.Such as in Figure 45 (a) to (d), Figure 46 (a) to (d), Figure 47 (a) to (d), Figure 48, Figure 49, Figure 50, figure Shown in example of the 51 and Figure 52 to Figure 64, CQI RS can be located in specific two OFDM symbols in subframe.Figure 52 To Figure 54 being given for example only property purpose, therefore, in the frequency domain that CQI RS is wherein deployed to specific two OFDM symbols Starting position can differently change.
In a frequency domain, the resource element that CQI RS is deployed to can be identical as the resource element that public RS is deployed to (see Figure 52 to Figure 56) or can difference (see Figure 57 to Figure 64).
As shown in Figure 52 to the example of Figure 56, wherein by separating identical resource element distance (that is, 3 resources The distance of element) and in the case where disposing the pattern of CQI RS, it can be disposed by being shifted using a resource element as unit The resource element that CQI RS in three continuous cells is deployed to, to avoid the overlapping between resource element.Such as figure It, can be in the case where wherein CQI RS is deployed to the pattern of four continuous resource elements shown in 57 example to Figure 60 The resource element being deployed to by shifting the CQI RS to be deployed in three continuous cells using four resource elements as unit Element, to avoid the overlapping between resource element.As shown in Figure 61 to the example of Figure 64, CQI RS is deployed to two wherein A continuous resource element and depending on being deployed to by separating at a distance from 4 resource elements with the continuous resource element of the first two In the case where the pattern of two continuous resource elements of position, three can be deployed in by shifting as unit of two resource elements The resource element that CQI RS in a continuous cell is deployed to, to avoid the overlapping between resource element.
Figure 65 is shown in two OFDM symbols in subframe to the example of 12 resource element deployment CQI RS.At one In OFDM symbol, CQI RS can be deployed to as shown in Figure 65 (a) and separate identical resource element distance (that is, two moneys The distance of source element) resource element, and CQI RS can be deployed to 6 continuous resource elements as shown in Figure 65 (b) Element.Alternatively, CQI RS can be deployed to certain amount of continuous resource element as shown in Figure 65 (c) or Figure 65 (d), with And the certain amount of continuous resource element of specific resource element distance is separated with resource element before.It can be for each A cell or cell group shift the resource element that CQI RS is deployed in a frequency domain, dry between resource element to reduce It disturbs.For example, in the case where Figure 65 (d), it can be by setting any one of value 1 to 8 for deviant come in a frequency domain The resource element that displacement CQI RS is deployed to.
In the case where Figure 65 (a), by the way that 8 antennas (duty cycle 1) are identified using CDM in a subframe.Or Person, can be by identifying four antennas in a subframe using CDM, and can be by using configuring in this way Two subframes identify 8 antennas (duty cycle 2).Alternatively, can be by the way that two days be identified using CDM in a subframe Line, and 8 antennas (duty cycle 4) can be identified by using four subframes configured in this way.
Figure 66 is shown in two OFDM symbols in subframe to the example of 16 resource element deployment CQI RS.
In an OFDM symbol, it can be separated from each other as shown in Figure 66 (a) with the continuous resource element of two of them The pattern of the distance of one resource element disposes CQI RS, and can as shown in Figure 66 (b) with wherein 4 continuous moneys Source element is separated from each other the pattern of the distance of two resource elements to dispose CQI RS.Alternatively, can be incited somebody to action as shown in Figure 66 (c) CQI RS is deployed to 8 continuous resource elements.
For example, if disposing CQI RS as shown in Figure 66 (a), it can be by being known in a subframe using CDM Other 8 antennas (duty cycle 1).Can be by the way that four antennas be identified using CDM in a subframe, and it can be by making 8 antennas (duty cycle 2) are identified with two subframes configured in this way.It can be by being used in a subframe CDM identifies two antennas, and (the work of 8 antennas can be identified by using four subframes configured in this way Period 4).
Figure 67 shows the example for disposing two CQI RS in two OFDM symbols in subframe to 16 resource elements.Often One subframe is deployed to 8 resource elements.
CQI RS 1 and CQI RS 2 can be deployed to the resource element of the same frequency domain in two OFDM symbols, such as Shown in Figure 67 (a) and (c).Alternatively, CQI RS can be deployed to the resource element of different frequency domains as shown in Figure 67 (b). Figure 67 (d) shows the example that a CQI RS is only disposed to an OFDM symbol.
If each of two CQI RS is used for an antenna, four configured in this way in a subframe Subframe can be used for identifying 8 antennas (duty cycle 4).If used in a subframe by using each CQI RS of CDM In two antennas, then it can be used for four antennas.Therefore, two subframes configured in this way can be used for identifying 8 Antenna (duty cycle 2).If each CQI RS is used for four antennas in a subframe, a subframe can be used only To identify 8 antennas (duty cycle 1).
Figure 68 and Figure 69 shows in two OFDM symbols in subframe and disposes two CQI RS's to 16 resource elements Other examples.
In the example in Figure 68 and 69, can by as unit of cell or cell group in a frequency domain shift use with The resource element that CQI RS is deployed to by deviant.Deviant can be set to any one of value 1 to 4.
Figure 70 and Figure 71 shows in two OFDM symbols in subframe and disposes showing for 4 CQI RS to 16 resource elements Example.
If each CQI RS is used for an antenna in a subframe, four antennas can be identified, therefore, with this Two subframes that kind mode configures can be used for identifying 8 antennas (duty cycle 2).Alternatively, an OFDM into subframe is accorded with The CQI RS 1 to CQI RS4 of number deployment can be used for identifying four antennas, and disposed to a remaining OFDM symbol CQI RS 1 and CQI RS 4 can be used for identifying other four antenna (duty cycle 1).Alternatively, if by using CDM in son Each of frame CQI RS is used for two antennas, then four in subframe CQI RS can be used for identifying (the work of 8 antennas Period 1).In the example of Figure 71, can by frequency shift come by use as unit of cell or cell group with deviant The resource element that CQI RS is deployed to.Deviant can be set to any one of value 1 to 6.
Figure 72 and Figure 73 shows in two OFDM symbols in subframe and disposes showing for 8 CQI RS to 16 resource elements Example.
Because affixing one's name to 8 CQI RS in the middle part of a subframe, it is possible to identify and use 8 antennas.It can identify each A CQI RS, because being assigned with different resource elements to it.In the example of Figure 73, the money that CQI RS can be deployed to Source element shifts 1 to 8 resource element according to deviant in a frequency domain.Deviant can with cell or cell group difference.
Figure 74 shows an example, wherein emit CQI RS in two OFDM symbols of resource area, and wherein, 4 CQI RS are disposed to 16 resource elements, wherein resource area includes a subframe in the time domain, and includes in a frequency domain 12 subcarriers.
Figure 75 shows an example, wherein emit CQI RS in two OFDM symbols of resource area, and wherein, 8 CQI RS are disposed to 16 resource elements, wherein resource area includes a subframe in the time domain, and includes in a frequency domain 12 subcarriers.
Hardware, software, or its combination can be used to realize the present invention.In hardware implementation mode, can be used it is following it One realizes the present invention: specific integrated circuit (ASIC), digital signal processor (DSP), programmable logic device (PLD), existing Field programmable gate array (FPGA), processor, controller, microprocessor, other electronic units and a combination thereof, they are designed to Execute above-mentioned function.In software realization mode, the present invention can be realized by the module for executing above-mentioned function.Software It can be stored in storage unit, and be executed by processor.Various devices well known to those skilled in the art can be with It is used as storage unit or processor.
Although the present invention is specifically illustrated and described by reference to exemplary embodiment of the present invention, in the art Technical staff, can it will be appreciated that without departing from the spirit and scope of the present invention defined by the appended claims Wherein to make various changes in form and details.Should exemplary embodiment only be considered in illustrative meaning, Rather than for purposes of limitation.Therefore, the scope of the present invention is not limited by detailed description of the invention, but by appended power Benefit requires to limit, and all difference in the range are interpreted as including in the present invention.

Claims (12)

1. a kind of method for receiving reference signal in a wireless communication system, the method are executed by user equipment and include:
At least one reference signal is received in subframe, wherein the subframe includes multiple orthogonal frequency division multiplexing in the time domain OFDM symbol and multiple subcarriers in a frequency domain, and
Wherein, in two different OFDM symbols of the subframe, each of at least one described reference signal is divided Two resource elements of dispensing, and
Wherein, described two when the subframe includes 14 OFDM symbols and from 0 to 13 indexes 14 OFDM symbols Different OFDM symbols includes OFDM symbol 5 and 6.
2. according to the method described in claim 1, wherein, each of at least one described reference signal is every for measuring The reference signal of the channel status of a antenna.
3. according to the method described in claim 1, wherein, described two different OFDM symbols are continuous in the time domain.
4. according to the method described in claim 1, wherein, at least one described reference signal, by it is described two not Two resource elements in same OFDM symbol with identical frequency usually receive two reference signals for two antennas, and
Two reference signals for being used for two antennas are identified by mutually different code.
5. according to the method described in claim 1, wherein, by having first frequency in described two different OFDM symbols Two resource elements usually receive the reference signal for first antenna and the second antenna, and by described two different Two resource elements in OFDM symbol with second frequency usually receive the reference signal for third antenna and the 4th antenna.
6. according to the method described in claim 5, wherein, identified by mutually different code described for first antenna and the The reference signal of two antennas, and the reference letter for third antenna and the 4th antenna is identified by mutually different code Number.
7. according to the method described in claim 1, wherein, by having first frequency in described two different OFDM symbols Two resource elements usually emit the reference signal for first antenna and the second antenna, by described two different OFDM In symbol with second frequency two resource elements usually emit be used for third antenna and the 4th antenna reference signal, by Two resource elements in described two different OFDM symbols with third frequency usually emit for the 5th antenna and the 6th day The reference signal of line, and usually sent out by two resource elements in described two different OFDM symbols with the 4th frequency Penetrate the reference signal for the 7th antenna and the 8th antenna.
8. according to the method described in claim 7, wherein, identical two resource elements are identified by by mutually different code Two reference signals of element transmitting.
9. according to the method described in claim 7, wherein, two resource elements with the first frequency and have described the Two resource elements of three frequencies are continuous in a frequency domain.
10. according to the method described in claim 9, wherein, two resource elements with the second frequency and have described Two resource elements of the 4th frequency are continuous in a frequency domain.
11. according to the method described in claim 1, wherein, described two different OFDM symbols are all included in the subframe The first time slot or the second time slot in.
12. a kind of equipment for receiving reference signal in a wireless communication system, the equipment include:
Memory；And
Processor, the processor are coupled with the memory,
Wherein, the processor is configured to receive at least one reference signal in subframe,
Wherein, the subframe includes multiple orthogonal frequency division multiplex OFDM symbols in the time domain and multiple sub- loads in a frequency domain Wave, and
Wherein, in two different OFDM symbols of the subframe, each of at least one described reference signal is divided Two resource elements of dispensing, and
Wherein, described two when the subframe includes 14 OFDM symbols and from 0 to 13 indexes 14 OFDM symbols Different OFDM symbols includes OFDM symbol 5 and 6.
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US10498593B2 (en) * 2016-09-07 2019-12-03 Qualcomm Incorporated Cell-specific reference signal (CRS) and control channel configuration in wireless communications
CN107809799A (en) * 2016-09-08 2018-03-16 北京信威通信技术股份有限公司 A kind of method and device for sending physical channel reference signal
WO2018174543A1 (en) 2017-03-21 2018-09-27 엘지전자 주식회사 Method for allocating reference signal resource in wireless communication system and apparatus therefor
CN110856096B (en) * 2018-07-30 2022-07-15 中兴通讯股份有限公司 Positioning reference signal generation method, related device, communication system and storage medium
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