CN103703846B - The supply resource Elemental partition in the physical resource of downlink channel - Google Patents
The supply resource Elemental partition in the physical resource of downlink channel Download PDFInfo
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- CN103703846B CN103703846B CN201180072575.9A CN201180072575A CN103703846B CN 103703846 B CN103703846 B CN 103703846B CN 201180072575 A CN201180072575 A CN 201180072575A CN 103703846 B CN103703846 B CN 103703846B
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- 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
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- 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
- H04L5/0041—Frequency-non-contiguous
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
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Abstract
The present invention proposes the method for the supply resource Elemental partition in the physical resource of downlink channel, computer program product and equipment, the physical resource of the wherein described downlink channel is provided in time domain and frequency domain, wherein each resource element is defined by the corresponding subcarrier bandwidth in the corresponding interval and frequency domain in time domain, and the multiple resource elements wherein defined by the continuous subcarrier of the second number in the consecutive intervals and frequency domain of the first number in time domain define respective resources element blocks, the present invention relates to respective resources element blocks are divided into multiple resource element subgroups, and the multiple resource element subgroup is distributed at least two terminals.
Description
Technical field
The present invention relates to the methods, equipment that contemplate the supply resource Elemental partition in the physical resource of downlink channel
And computer program product.
Background technology
Mobile data transmits and data service constantly makes progress.With the increasingly infiltration of this service, more and more use
Family will be applied to data transmission using limited transmission resource.It is therefore important that available resources are used effectively.
Currently, the communication system and/or standard of referred to as long term evolution LTE and existing its advanced versions LTE-A are just developed.
These development are so-called multiple-input and multiple-output MIMO on one side, this is the reliability and handling capacity for enhancing transmission
Transmit principle.
In general, in mobile communication system, network is indicated by an at least network transceivers station, be known as Node_B (
In UMTS) or be evolution Node_B (eNB, in LTE/LTE-A).This transceiver station is known as the use of UE to one or more
Family terminal transmission.This direction of transfer is referred to as downlink DL, and the transmission from UE to eNB is referred to as uplink UL.Transmission
Dependent on physical channel and logic channel.Physical channel is mainly determined by time and/or frequency/bandwidth and transmission logic is believed
Road.In general, logic channel can be divided into dedicated channel (being used only for particular device) and shared channel (being shared by multiple equipment),
And control channel (for carrying control information) and data channel (for carrying payload/data).
About the present invention that hereinafter will be described in more detail, it is main consider physical downlink control channel PDCCH and/
Or physical down link sharing channel PDSCH.
Note that although the present invention explains exemplary reference LTE/LTE-A, this is merely exemplary.Thus,
Even if some terms used here be based on or similar to used in LTE/LTE-A term in the case of, the present invention
Other communication systems are still can be applied to, as long as they are to be based on identical principle.In addition, even if in one used here
In the case that a little terms are different from the term used in LTE/LTE-A, the present invention still can be applied to LTE/LTE-A communication systems
System.
For long-range evolution (LTE)-advanced Rel-11 in 3GPP, downlink multiple-input and multiple-output (MIMO) enhancing
Research project has been reached common understanding (see RP-110457, Study on Downlink MIMO Enhancement for LTE-
Advanced, 3GPP TSG-RAN meeting #51, kansas, U.S.A city, 15-18 days in March, 2011).One theme is related to increasing
Strong physical downlink control channel (being known as E-PDCCH), this is recognized as related with the present invention.
The demand enhanced PDCCH has also been investigated in all bibliography described as follows：Rl-104607, Discussion
On PDCCH capacity considering MU-MIMO, Samsung, 3GPP TSG RAN WG1 meeting #62, Spain
Madrid, in August, 2010 23-27 days and Rl-111636DL Control Channel Enhancement for DLMIMO
In Rel-11, NTT Docomo, 3GPP TSG RAN WG1 meeting #65, Barcelona, ESP, 9-13 days in May, 2011.
The motivation of these work includes for example it is expected to avoid passing with multi-user (MU)-MIMO and collaboration multiple spot (CoMP)
The PDCCH capacity for the system sent/received limits.In addition to this, it is also moved under traditional (legacy) physics by by that will control
The ink Shared Channel region (PDSCH) and the possibility driving for obtaining interference synergic between more preferably unit.
It is currently just studied in 3 gpp and is similarly machine type by another theme that the present invention herein solves
Type communicates (MTC) or Machine To Machine (M2M) communication.In physical layer, MTC may need from a large amount of UE while transmit.However
Under the existing definition of PDSCH/PDCCH, this will rapidly result in the transmit capacity exhausted.
E-PDCCH can be multiplexed with PDSCH.About this multiplexing of E-PDCCH and PDSCH, from being submitted to 3GPP
Some company's manuscripts of RANI#65 meetings are apparently, it appears that frequency division multiplexing (FDM) structure of E-PDCCH and PDSCH will be most of
Preference.FDM, which refers to E-PDCCH and PDSCH, herein will not be mapped to identical physical resources block (PRB), that is, same PRB
Middle E-PDCCH and PDSCH not Time Division Multiplexing).
On the contrary, E-PDCCH will be mapped to that the PRB being located at compared with PDSCH in different bandwidth/frequency field.Physics provides
Source area block indicates the block for being assigned the physical resource used by channel.In general, physical resource block is by multiple so-called resource elements
Plain (RE) is constituted, such as the physical resource of downlink channel is provided in time domain and frequency domain.
From the angle of multiplexing, E-PDCCH will be similar to that PDSCH, that is, be multiplexed into multiple PRB.What distribution was used by E-PDCCH
PRB will signal UE by higher (wireless heterogeneous networks, RRC).
There is also the inside discussion of remaining project of related E-PDCCH designs.
That is, in the multiple resource elements for constituting physics resource block, there is carrying collective reference signal (CRS)
And/or the resource element of demodulated reference signal (DMRS) or the like (not at least being payload data).Receiving device needs
Know which resource element carries this reference signal for suitably receiving the decode.Then monitoring/the monitoring of this receiving device
These resource elements are to obtain the knowledge of the reference signal needed for decoding.Therefore, E-PDCCH designs need to consider to given use
Family equipment (UE) indicates the mode of demodulated reference signal (DMRS) port index or the scrambler identity (SCID) for E-PDCCH.
One open problem is still the control channel element (CCE) how defined with E-PDCCH.Control channel element
Refer to that UE searches substantially one group of resource element of E-PDCCH from it.Such as in current LTE PDCCH, a CCE is defined
To be mapped in whole system bandwidth 36 RE (i.e. in more than one PRB) in a distributed way, and UE is poly- from being known as
1,2, the 4 or 8 cascade CCE for collecting rank search DL/UL mandates.Different number of CCE can substantially realize that the link of PDCCH is suitable
Match, because selecting the CCE numbers for specifying UE by being suitably based on such as channel quality indication CQI report received from UE
Mesh and down link control information DCI format (PDCCH payload), eNB will control encoding rate.
For E-PDCCH, problem is the scale adjustment (dimensioning) of CCE.
According to the assessment of the present inventor, it appears that there are two modes to complete this point：
Mode #1：
A CCE defined in PRB and in addition to being referenced signal (i.e. CRS, DM-RS, CSI-RS and potential other/new ginsengs
Examine symbol) all RE other than the RE that occupies or the RE that is kept silent and (be not used or be preserved for other purposes).In this way
Example be shown in Fig. 1 (a).
Mode #2；
The design for Rel-10 relaying PDCCH (R-PDCCH) is followed, the physical layer (such as " 3GPP for operation of relays
TS36.216Evolved Universal Terrestrial Radio Access(E-UTRA);Physical layer for
Operation, V10.3.0,2011 years June of relaying " described in), i.e., by time slot line of demarcation, i.e., in the time domain at 7
PRB is divided into two CCE after OFDM symbol.Such example is shown in Fig. 1 (b).
With reference to figure 1, some substantially applicable definition/relationships are explained to be best understood from.Fig. 1 (a) and (b) are shown such as
Resource element in the physical resource of the downlink channel of PDCCH/PDSCH.As indicated, the physical resource of downlink channel
It is provided in time domain and frequency domain (bandwidth of reference subcarrier diagram).Each resource element is by the corresponding interval and frequency domain in time domain
In corresponding subcarrier bandwidth definition；It is by square box graphic representation.
For specifying subcarrier, multiple resource elements to be defined by the consecutive intervals of the first number in time domain.They use rope
Draw 0 to 13 to number.Thus, 14 resource elements (each indicating 1 OFDM symbol) in time domain constitute the 1ms duration
1 subframe, 1 subframe are made of 2 time slots.Thus, corresponding time slot includes 7 OFDM symbols and has 0.5ms
Duration.In addition, to being spaced at fixed time, multiple resource elements are determined by the continuous subcarrier of the second number in frequency domain
Justice.Their indexs of reference 0 to 11 are numbered.Thus, 12 subcarriers are grouped in time with corresponding 14 OFDM symbols to be formed
Respective resources element blocks are also referred to as physical resource block PRB.Other PRB (not shown) is present in the choosing of bandwidth shown in Fig. 1
Take the bandwidth region above and below part.
As shown in Fig. 1 (a), 3 (continuous) OFDM symbols 0,1 and 2 are for example preserved for all subcarriers and define
The control areas PDCCH.They constitute the respective resources element blocks for being excluded carrying payload, are hereinafter referred to as special resource
Element.Other resource elements include that can be used for carrying payload (for the OFDM symbol 3 to 13 for all subcarriers)
Resource element.In these multiple resource elements, several multiple resource elements are referred to as retaining resource element, the reservation resource element
The reference signal of element carrying such as CRS, DMRS.
That is, PRB includes 12 being multiplied by 14 (OFDM) resource element RE in total, and the RE in illustrated example
In, 3*12 RE is special resource element and 28 RE are to retain RE.Therefore, in this PRB, 104 RE can be used for holding
Carry the payload data of E-PDCCH in control channel element CCE.CCE indicates one group in such a or multiple PRB
RE：(control) information for being associated with channel is passed wherein, and it is received equipment searching/monitoring.Thus, it is sent out by eNB
The DL CCE sent are by receiving UE into line search.
Thus, it can be appreciated that resource-inefficient rate in this one or more scenes shown in Fig. 1 (a) and (b).Also
It is to say, the number up to 104 in Fig. 1 (a) for the RE of CCE#k, and CCE#m still has 66 RE and Fig. 1 (b) in Fig. 1 (b)
Middle CCE#k has 38 RE.
In table shown in Fig. 2, the possibility that compares the number for the different CCE RE designed and use.For making
With the possibility of different aggregation levels, the present inventor is with reference to the estimation in [2] 0 and [5].Hence it is demonstrated that such as Fig. 1 (a)
In CCE sizes will be in most cases too big, and the CCE sizes in Fig. 1 (b) are also inefficient, this is because
The CCE sizes of 36 RE are that enough possibilities will be greater than 50%.(in most left column, " 1CCE " indicates aggregation levels 1, and " 2CCE "
Indicate aggregation levels 2).
Pay attention in subframe exist less than 3 PDCCH OFDM symbols (i.e. for the smaller control areas PDCCH) and/
Or less than 4 collective reference signal (CRS) ports the case where being configured, resource-inefficient rate will than shown in these examples even
It is more serious, this is because the number of the RE of each CCE will be even greater than above-mentioned number in these cases.
In addition, E-PDCCH will support closed loop precoding (beam forming gain) and even support frequency domain to a certain extent
Scheduling, the two all imply improved link budget.In consideration of it, the problem will even more be shown.
PRB is simply divided along with this problem in time slot line of demarcation：Reference signal (RS) be designed to
Entire PRB is used together.In R-PDCCH (Fig. 1 (b)), which is avoided so that the first and second time slots are always used to
Same relay node, in other words actually entire PRB is still assigned to 1 UE, even if part of it is (such as in Fig. 1 (b)
CCE#m or #k) it can be not used.
It can not for example use same UE that there is this constraint of entire PRB in MU-MIMO arrangements now, because this will be unrestrained
Take resource.
It is desirable that small packet is transmitted to multiple UE, similar problems will appear for PDSCH transmission：In view of
64QAM and MIMO with multiple parallel data streams are supported, and 1 PRB can actually be proved to be too many.Therefore this
In the case of PDSCH be also resource-inefficient rate.
Therefore, make it possible in the PDSCH region transmitted for the CCE of E-PDCCH or for normal PDSCH into
Problem is there will naturally be in terms of the small distribution of row, this is because resource is wasted and/or is encountered in supporting reference signal RS
It is difficult.
Thus, however it remains it is further improved the demand of this system.
Invention content
The exemplary various aspects of the present invention illustrate in the claims.
According to first aspect present invention related with the method implemented in eNB, provides a method, be included in downlink chain
Supply resource Elemental partition in the physical resource of path channels, wherein the physical resource of the downlink channel is in time domain and frequency domain
In be provided, wherein each resource element is defined by the corresponding subcarrier bandwidth in the corresponding interval and frequency domain in time domain, and
The multiple resources wherein defined by the continuous subcarrier of the second number in the consecutive intervals and frequency domain of the first number in time domain
Element definition respective resources element blocks, the method further includes respective resources element blocks are divided into multiple resource elements
Subgroup, and the multiple resource element subgroup is distributed at least two terminals.
Beneficial further development is defined in corresponding dependent claims.
According to second aspect of the present invention related with the method implemented in terminal UE, provides a method, be included in end
End receives transmission, which includes the reservation money of the subgroup of resource element and the carrying reference signal for the respective sub-set
The instruction of source element, and determine at least one subgroup for being assigned to the terminal and determine and be used at least one distribution
Subgroup carrying reference signal resource element.
Beneficial further development is defined in corresponding dependent claims.
According to a third aspect of the present invention, a kind of computer program product is provided comprising computer can perform component, when
When described program is run on computers, which can perform component and is configured to implement such as method as defined above side herein
Face.
Above computer program product may further include computer can perform component, when described program on computers
When operation, which can perform in terms of component is executed in conjunction with each method in terms of method as discussed above.Above computer journey
Sequence product may be embodied as computer readable storage medium.
According to fourth aspect present invention related with the equipment of the network transceivers equipment that is implemented into such as eNB or module,
A kind of equipment is provided, which includes control module, is configured to the supply resource in the physical resource of downlink channel
Elemental partition, wherein the physical resource of the downlink channel is provided in time domain and frequency domain, wherein each resource element by
Corresponding subcarrier bandwidth in corresponding interval and frequency domain in time domain defines, and wherein by the company of the first number in time domain
Multiple resource elements that the continuous subcarrier of continuous interval and the second number in frequency domain defines define respective resources element blocks, institute
It states control module to be further configured to respective resources element blocks being divided into multiple resource element subgroups, and by the multiple money
Source element subgroup distributes at least two terminals.
Beneficial further development is defined in corresponding dependent claims.
According to fifth aspect present invention related with the equipment of the terminal that is implemented into such as user equipment (UE) or module, provide
A kind of equipment, the equipment include receiver module, are configured to receive transmission, the transmission include resource element subgroup and
The instruction of the reservation resource element of carrying reference signal for the respective sub-set；And control module, it is configured to determine
It distributes at least one subgroup of the terminal and determines the carrying reference signal of the subgroup at least one distribution
Resource element.
Method, equipment and the computer program product described within this document uses, and at least in the exemplary embodiment, carries
Go out several PRB designs, the design improves resource efficiency respectively.In addition, together with PRB designs, the present invention also proposes phase
DMRS is answered to support also to realize reliable MU-MIMO transmission.In this regard, the present invention realize via E-PDCCH and/or
The transmission of PDSCH downlink channel, and it is only necessary to the very fractions in entire usable radio resources space.The thus present invention
Solve the design and operation for carrying out small distribution in the downlink of LTE under increased resource efficiency.
Thus, performance improvement is based on according to an exemplary aspect of the present invention and/or the method for embodiment, equipment and calculating
Machine program product.
Description of the drawings
It is described below referring now to being carried out in conjunction with attached drawing in order to more thoroughly understand example embodiments of the present invention, attached
In figure：
Fig. 1 illustrates the basic overview for summarizing PRB in time domain/frequency domain of resource-inefficient rate in existing scene；
The table instruction of Fig. 2 diagrams includes the function using possibility and aggregation levels of the CCE of a certain number resource element；
Fig. 3 (a) to (d) diagrams are divided into multiple resource element subgroups related according to this hair with by respective resources element blocks
The scene of bright embodiment；
Fig. 4 diagrams are related with reference signal to be added to the resource element of subgroup according to the ... of the embodiment of the present invention exemplary
Scene；
Fig. 5 diagrams are related with one aspect of the present invention between the network transceivers equipment of such as eNB and the terminal of such as UE
Signaling diagram.
Specific implementation mode
The illustrative aspect and/or embodiment of the present invention will be described below.
In general, the present invention is implemented in the communication system for example according to LTE and/or LTE-A standard configurations, but it
It can be applied to other standards.
That is, of the invention, according at least to its illustrative aspect and the above-mentioned or other communication system applicable with it
It is related, it is related to the supply resource Elemental partition in the physical resource of downlink channel, wherein the object of the downlink channel
Reason resource is provided in time domain and frequency domain.Each resource element is by the corresponding sub-carrier bin in the corresponding interval and frequency domain in time domain
Width definition.The multiple moneys defined by the continuous subcarrier of the second number in the consecutive intervals and frequency domain of the first number in time domain
Source element defines respective resources element blocks.
In principle, according to in/related one aspect of the present invention of method for being implemented by eNB, for example, this method be related to by
Respective resources element blocks are divided into multiple resource element subgroups, and the multiple resource element subgroup is assigned at least two
Terminal.This seed group is also referred to as mini-PRB below.
Each aspect of the present invention will illustrate here in greater detail with reference to the attached drawings.In this regard, on the one hand it is known as
" proposing #1 " solves the son aspect of this segmentation below, is on the one hand known as
" proposing #2 " solves the son aspect of reference signal in the subgroup divided below, and is on the one hand known as
" propose #3 " solves the signaling between involved equipment (such as eNB and UE)/in involved equipment below
The son aspect of processing.
Propose #1 (segmentation)
It is hereinafter referred to as " tradition " resource as having the resource of the PRB in time domain/frequency domain defined in standard.
Based on this PRB resources, according to an aspect of the present invention, those traditional (such as PDSCH) resource quilts in a PRB
It is divided into multiple subgroups or " mini-PRB ".This realizes that the efficiency for E-PDCCH or small PDSCH distribution improves, because each
Mini-PRB can be assigned to corresponding terminal.Thus, (tradition) PRB can be assigned to more than one user terminal/by more
It is used in a user terminal.
Following summary just divides tradition PRB may be defined with obtaining at least four kinds of of multiple this mini-PRB.
Define #1：
A PRB is divided into multiple mini-PRB in a frequency domain.In each traditional PDSCH region of mini-PRB coverings
The subset of all OFDM symbols and several continuous subcarriers as PRB bandwidth.The example of this segmentation applied to traditional PRB
It is shown in 3 (a).
Define #2：
A PRB is divided into more than two mini-PRB, whole bandwidth of each mini-PRB coverings PRB in the time domain
And subset of several continuous OFDM symbols as traditional PDSCH region.The example of this segmentation applied to traditional PRB is shown in
3(b)。
Define #3
Divide PRB in frequency domain and time domain.
The example of this segmentation applied to traditional PRB is shown in 3 (c).
Define #4：
One PRB is divided into multiple mini-PRB using multiple RE as unit.These mini-PRB are not overlapped, and are had
The continuous resource of almost equal size.(this can also be considered as the special circumstances for defining #3 above).Applied to traditional PRB
The example of this segmentation be shown in 3 (d).
Notice that the segmentation according to definition #1 to #3 above will obtain rectangular-shaped mini-PRB, and according to point for defining #4
The mini-PRB of non-rectangle shape can be obtained by cutting.Such as (it includes so-called spy not to be located to RE available to 104 in order from 1 to 104
RE those of in the control areas PDCCH of different resource element) when being numbered.Then, for example, the first mini-PRB#k is occupied
RE#l-#34, the 2nd mini-PRB#m occupy RE#35-#68, and the 3rd mini-PRB#n occupies RE#69-#104.Therefore, one
RE in a OFDM symbol or a subcarrier may belong to different mini-PRB.
It should be noted that respective resources element blocks (traditional PRB) include being excluded the special resource element of carrying payload
(control areas PDCCH) and the resource element that can be used for carrying payload.According to #4 is defined, can be used for carrying based on described
The number of the resource element of payload and the number of the subgroup of acquisition is executed into the segmentation.Similarly, according to definition #2
And #3, segmentation do not consider those such as 3 OFDM symbols for example occupied by special resource element.
According to #1 to #3 is defined, segmentation is by the time domain, either in a frequency domain or defined in time domain and frequency domain
Boundary between resource element subgroup executes, and according to defining #4, segmentation includes defining money by the resource element centainly counted
Boundary between source element subgroup.
Respectively from Fig. 3 (a), 3 (b) and 3 (c) it is clear that the boundary between the subgroup was defined in the time domain
In the case of, respective sub-set includes all resource elements in one or more of time domain continuous resource element and frequency domain, and
In the case that boundary between the subgroup is defined in a frequency domain, respective sub-set includes that one or more of frequency domain is continuous
All resource elements in resource element and time domain, and what the boundary between the subgroup was defined in time domain and frequency domain
In the case of, respective sub-set includes one or more of one or more of frequency domain continuous resource element and time domain resource element
Element.In these cases, one or more of resource elements in time domain are less than first number, and the institute in frequency domain
It states one or more resource elements and is less than second number.
In diagram respectively based on defining shown in the exemplary Fig. 3 (a) of mini-PRB, (b) and (d) that #1, #2 and #4 obtain
In example, PRB is for example divided into 3 mini-PRB, and as shown in Fig. 3 (c), based on #3 is defined, PRB is for example divided into 4
A mini-PRB.
Define #1
Segmentation PRB makes each 3 mini-PRB#k, #m and #n that will have 4 continuous subcarriers in a frequency domain, such as
Shown in Fig. 3 (a).
Define #2
Divide PRB in the time domain as unit of multiple OFDM symbols, it is all as shown in Figure 3 as shown in (wherein mini-PRB#k
Including 4 OFDM symbols), mini-PRB#m includes 3 OFDM symbols, and mini-PRB#n includes 4 OFDM symbols.
Define #3
Divide PRB in time domain and frequency domain so that each mini-PRB#k, #m, #n and #l include 6 subcarriers, and
Mini-PRB#k and #m respectively includes 6 OFDM symbols and mini-PRB#l and #n respectively include 5 OFDM symbols.
Define #4
Divide PRB as unit of multiple RE.Such as let it is assumed that there are a available RE of M (=104) in PRB, then
In the case of 3 mini-PRB will be obtained in the PRB, for the RE centainly counted, the size of corresponding mini-PRB respectively by
It is determined as：
(rounding integer value) a RE (=36).
Therefore, mini-PRB#k and #m is respectively provided with 34 RE, and mini-PRB#n has 36 RE.
Propose #2：It introduces and the DMRS of mini-PRB is supported
As previously mentioned, the multiple resource element in tradition PRB includes the reservation resource element for carrying reference signal,
By receiving device for decoding transmitted payload.Demodulated reference signal DMRS and collective reference signal CRS are in the various figures
Always it is indicated using different shades.In MIMO arrangements, passed from for example various antennas (example as corresponding port)
It send.
According to various aspects of the present invention, the support for reference signal can be obtained according at least two alternatives, it is special
It is not that DMRS is supported.
In principle, according to the first alternative, it includes reusing that respective resources element blocks, which are divided into multiple subgroups,
The reservation resource element of reference signal is carried in respective sub-set, and be may further include and be added to reference signal not
Including (or reusable) for being reused retains the resource element of the subgroup of resource element.
In addition, in principle, according to the second alternative, since the multiple resource element includes carrying reference signal
Retain resource element, and transmitted via multiple ports due to retaining resource element, implement DMRS supports may include will be through
The reservation resource element transmitted by corresponding port is linked at least one subgroup.
If desired, it could even be possible to combination above-mentioned two alternative is to form third alternative.
Independent alternative #1 and #2 will be illustrated in further detail below.
DMRS alternatives #1：
According to this alternative, the specific DMRS designed for each mini-PRB is proposed.Ready column-generation and just
For handing over overlay code (OCC) to select, any this novel DMRS designs for (being obtained from segmentation) mini-PRB should be use up
Current (i.e. traditional) DMRS of PDSCH may be reused.
This will have such benefit：DMRS is kept in the case of the MU-MIMO of both E-PDCCH and PDSCH transmission
Orthogonality, and avoid the interference of the PDSCH transmission to traditional UE.
In same PRB, identical precoding should be applied to space layer on specified mini-PRB and with the mini-
The subset of the corresponding DMRS RE of space layer on PRB.
From improving for performance perspective, additional DMRS RE can be inserted using independent sequence and mapping and passed without changing
Unite DMRS.
According to DMRS alternative #1, for above-mentioned each example, the DMRS designs that corresponding mini-PRB is defined can be
Different：
For example, for defining #1, ready column-generation and it is mapped to for physical resource, the holding of DMRS patterns and Rel-
10DMRS is designed identical.But the DMRS RE in 1 PRB are correspondingly divided into 3 groups, every group is respectively provided with 4 RE,
As found out in Fig. 3 (a).In other words, the DMRS only in corresponding mini-PRB is used for the channel estimation of corresponding mini-PRB.It is right
In each 3 mini-PRB, same precoding will be applied to E-PDCCH or PDSCH RE and corresponding DMRS RE.
Pay attention to that due to the mini-PRB in a PRB different UE, the precoding between different mini-PRB can be assigned to
Vector/matrix can also be independent.
The example that follow Fig. 3 (a), the channel estimation for decoding E-PDCCH or PDSCH will be based only on 1 (tradition)
Wherein 4 (for 1 mini-PRB) of 12 DMRS RE in PRB.
#1 is defined more suitable for frequency selectivity is relatively low and the higher channel scenario of time variation.
Similarly, the example described above for being suitable for Fig. 3 (d) in a similar manner, this is illustrated is divided into based on definition #4
Multiple mini-PRB.That is, only the DMRS in corresponding mini-PRB is used for the letter for the corresponding mini-PRB
Estimate in road.The example that follow Fig. 3 (d), the channel estimation for decoding E-PDCCH or PDSCH will be based only on 1 (tradition)
Wherein 4 (for 1 mini-PRB) of 12 DMRS RE in PRB.
Similarly, the example described above for being suitable for Fig. 3 (c) in a similar manner, this is illustrated is divided into based on definition #3
Multiple mini-PRB.That is, only the DMRS in corresponding mini-PRB is used for the letter for the corresponding mini-PRB
Estimate in road.The example that follow Fig. 3 (c), the channel estimation for decoding E-PDCCH or PDSCH will be based only on 1 (tradition)
Wherein 2 (for the mini-PRB#m and #n) of 12 DMRS RE in PRB.
According to fixed case, additional DMRS can also be added to those mini-PRB#m and #n respectively, and (they have than it
The less DMRS RE of its mini-PRB), the mini-PRB to spread all over the multiple segmentation has the DMRS RE of even number.
For defining #2, current DMRS RE can be naturally partitioned into two by keeping the ability of time domain orthogonal covering
Group, and respectively 2 mini-PRB services.However, the mini-PRB# in 1 mini-PRB in the example, i.e. Fig. 3 (b)
M does not have corresponding DMRS resources.Therefore, it is necessary to the novel DMRS designs for this specific mini-PRB.
Exact DMRS designs should abide by following principles：
Newly added DMRS RE should not influence currently have DMRS RE, the DMRS RE include pattern, signal sequence,
Resource impact etc..
Newly added DMRS RE, which should be located at, not to be had corresponding DMRS and (or if related fixed case is described above, has
The DMRS RE fewer than other mini-PRB) mini-PRB in resource area, to realize good channel estimating performance.
Pattern, sequence and the resource impact of newly added DMRS, which should be used, similar with traditional DMRS is configured as benchmark
Line.
Additional DMRS RE can use independent sequence and mapping to be inserted into, without changing tradition DMRS in aspect of performance.
Define that #2 is relatively low more suitable for frequency selectivity and the higher channel scenario of time variation.
The example that the DMRS RE of the addition of scene are illustrated based on Fig. 3 (b) is shown in Fig. 4.Certainly, similar addition DMRS RE
It can be adapted for the mini-PRB#m in Fig. 3 (c) and #n, herein above as described in fixed case.
DMRS alternatives #2：
According to DMRS alternative #2, propose by using the DMRS for being typically only intended for higher order MIMO
(such as DMRS port 9 and 10) and utilize have DMRS.In addition DMRS port and the mini-PRB distributed used in introducing
Between it is (implicit) link.
It is assigned 1 according to DMRS alternatives #2, each mini-PRB or several have DMRS port.This feelings
Under condition, (reception) UE estimates the channel for entire PRB, but then only decodes related part, that is, (multiple) distributed
mini-PRB。
May exist predefined link between the DMRS port distributed and the mini-PRB distributed, such as makes
(defined above in the mini-PRB for obtaining 3 mini-PRB)：
DMRS port 7 is linked to mini-PRB#1,
DMRS port 8 is linked to mini-PRB#2,
DMRS port 9 (with orthogonal covering codes length 2) or DMRS port 11 (with orthogonal covering codes length 4) link
To mini-PRB#3.
In addition when PRB segmentations are used for E-PDCCH or in the case where multiple mini-PRB are assigned to same UE,
DMRS port number can be linked to multiple mini-PRB, and (in the case of E-PDCCH, a mini-PRB corresponds to a control
Channel element CCE processed).In the case of E-PDCCH, this multiple number is determined by aggregation levels.For example, for assembling grade
Other 2, DMRS port 7 can be linked to mini-PRB (CCE) #1 and #2, i.e. UE will use DMRS port 7 for both.
In the case of PDSCH, this port number is transmitted on the PDCCH in resource allocation field by signaling.
It is related with DMRS alternatives #2, other than DMRS port 7＆8, it is also necessary to port 9＆10 (or port 11＆
13) to provide enough DMRS port numbers (4 ports in total), by DMRS RE/ port links to multiple mini-
PRB.Give the example of the link between DMRS port and mini-PRB.But for the 3rd mini-PRB, exact link
With at least two possible modes, this is because other two DMRS ports can or be 9＆10 (OCC length 2, with 24
DMRS RE) or be 11＆13 (OCC length 4 has 12 DMRS RE).That is, in Rel.10, define in total
24 RE, for up to 8 DMRS ports of each PRB.These 24 RE are divided into two groups of occupancy different sub-carrier,
And each group supports up to 4 ports.DMRS port in different groups is orthogonal naturally.It is covered via time domain orthogonal code real
Orthogonality in existing DMRS port group.When the number of DMRS port in a group is 2, the length of OCC needs to be 2.When one
When the number of DMRS port is more than 2 in group, OCC length 4 is needed.
Propose #3：
Such as the network of eNB can configure each UE between corresponding mini-PRB definition and therefore corresponding
Switch between DMRS designs.This can for example by wireless heterogeneous networks (RRC) signaling, according to channel attribute and system requirements come
It completes.Above, mini-PRB can be for subsequent use in 1 CCE or very small PDSCH distribution of transmission E-PDCCH, thus solves
The project for resource-inefficient rate of having determined.MU-MIMO is transmitted as the key technology for PDCCH enhancings and PDSCH transmission.This sky
Between multiplexing be likely to occur between multiple E-PDCCH or be happened between the E-PDCCH and PDSCH of the UE from separation.It is right
It is multiplexed in E-PDCCH, DMRS orthogonalities and channel estimating performance can be guaranteed under appropriate scheduling.However, E-PDCCH and
Multiplexing between PDSCH has more challenge.Fortunately, the quasi-orthogonal design as in Rel-11MU-MIMO can be here
By application to reduce inter-user interference.
Fig. 5 shows that one aspect of the present invention between the network transceivers equipment of such as eNB and the terminal of such as UE is related
Signaling diagram.
For eNB angles,
Operation related to the present invention is as follows：
- eNB and/or its Scheduler module (being indicated by number 1) determine resource allocation for the mini-PRB for UE
(as shown in step S11).
This may include：
Or determine that the mini-PRB (CCE) in the PRB for distributing to E-PDCCH for E-PDCCH is distributed, it is this
In the case of eNB schedulers will be selected for described (multiple) CCE's based on the UE E-PDCCH search spaces in specific subframe
(multiple) mini-PRB,
Or based on common scheduling decision logic, determine small PDSCH mini-PRB distribution, the in this case distribution
It will be located in any PRB for being not assigned to any other transmission (such as E-PDCCH).
In both cases, mini-PRB can be assigned according to #1 is defined to any one of #4 is defined.
In general, in step S12, eNB determines the DMRS for being associated with distributed mini-PRB.This may include：
Or the RE subsets for having one of DMRS port are only used only, especially in the mini-PRB distributed
In those of RE, i.e., the DMRS alternative #1 of #1, #3 or #4 are defined using such as mini-PRB,
Or using the new definition RE being located only in distributed mini-PRB, i.e., # is defined using such as mini-PRB
The DMRS alternative #1 of 2 or #3 (when DMRS is only added to mini-PRB#m and #n in Fig. 3 (c)),
Or selection is linked to one of existing DMRS port of distributed mini-PRB, DMRS in this case
Across entire PRB, i.e. DMRS alternatives #2.
- ENB step S13 by the mini-PRB distributed data (PDSCH) or control (E-PDCCH) and closed
The DMRS of connection is transmitted to UE (being indicated by 2) (in step S14).
In addition in the case of PDSCH, eNB1 will transmit associated control signaling, and the control signaling is indicated to UE2
Which mini-PRB is assigned.
For UE angles,
Operation related to the present invention is as follows：
- UE2 is received from eNB1 in step S21 and is transmitted,
Mini-PRB distribution is determined first in step S22, UE.This may include one of following：
In the case of PDSCH, resource allocation signal is received from eNB, which (multiple) which indicates
Mini-PRB has been dispensed into the UE.
In the case of E-PDCCH, based on the UE E-PDCCH search spaces in current subframe, correlation mini- is determined
PRB。
- UE then determines associated DMRS RE in step S23.Equally this may include DMRS alternatives #1 or #
2, wherein in the case of DMRS alternative #1, how selected DMRS approach can be arranged depending on mini-PRB
(defining #1, #2, #3 or #4).
Estimating to be used only for the channel of the mini-PRB based on associated DMRS in step S24, UE, (DMRS can be replaced
Change scheme #1) or for entire PRB channel (DMRS alternative #2).
- UE according to mini-PRB resource impacts come receive resource element and step S25 decode the data (PDSCH) or
It controls (E-PDCCH).
Up to the present, eNB is by the guarantor of the subgroup of resource element and carrying reference signal for the respective sub-set
It stays the instruction of resource element to be transmitted to terminal UE, and in addition will carry described in the resource element of payload and reference signal
Subgroup is sent to the terminal.
Similarly, up to the present for terminal UE, which receives transmission, which includes the subgroup of resource element
And the instruction of the reservation resource element of the carrying reference signal for the respective sub-set；And determination is assigned to terminal extremely
The resource element of the carrying reference signal of a few subgroup and the determining subgroup at least one distribution.Then, should
Terminal estimates channel based on the reference signal that is received in the resource element, and is decoded at least based on channel estimation
The payload data for including in the resource element of one subgroup.
Although what is be described above focuses on in terms of involved method herein, it should be appreciated that can be in terms of these methods
Implemented by computer program product or is implemented within hardware.That is, the equipment of such as eNB or UE are typically comprised and are used for
The interface (such as transceiver or transceiver module) of communication, internal storage and control module, the control module are based on from inside
Memory receives and/or the data of extraction control the operation of integral device.The control module can be arranged to implement the party
The application-specific integrated circuit ASIC of method either digital signal processor DSP or be configured to implement this method another processor,
Or the like.
Thus, the present invention similarly covers a kind of (eNB) equipment, which includes control module, is configured in downlink
Supply resource Elemental partition in the physical resource of link channel, wherein the physical resource of the downlink channel is in time domain and frequency
It is provided in domain, wherein each resource element is defined by the corresponding subcarrier bandwidth in the corresponding interval and frequency domain in time domain, and
The multiple resources wherein defined by the continuous subcarrier of the second number in the consecutive intervals and frequency domain of the first number in time domain
Element definition respective resources element blocks, the control module are further configured to respective resources element blocks being divided into multiple resources
Element subgroup, and the multiple resource element subgroup is assigned at least two terminals.
In such a device,
The control module is configured in the time domain, either in a frequency domain or the resource element defined in time domain and frequency domain
Boundary between sub-prime group；
The control module is configured to define the boundary between resource element subgroup by the resource element centainly counted；Its
In boundary between subgroup in the case of be defined in the time domain, respective sub-set include one or more of time domain even
All resource elements in continuous resource element and frequency domain, and the case where the boundary between the subgroup is defined in a frequency domain
Under, respective sub-set includes all resource elements in one or more of frequency domain continuous resource element and time domain, and in institute
In the case of stating the boundary between subgroup and be defined in time domain and frequency domain, respective sub-set include one or more of frequency domain even
Continuous one or more of resource element and time domain resource element；
One or more of resource elements wherein in time domain are less than first number, and described in frequency domain
One or more resource elements are less than second number；
Wherein respective resources element blocks include being excluded the special resource element of carrying payload and can be used for carrying
The resource element of payload, and the wherein described control module is configured to based on the resource that can be used for carrying payload
The number of element and the number of the subgroup of acquisition is split；
Wherein the multiple resource element includes the reservation resource element for carrying reference signal, and the wherein described control
Module is configured to by being divided into multiple subgroups to reuse carrying reference letter in respective sub-set the respective resources element blocks
Number the reservation resource element；
The control module is further configured to reference signal being added to not comprising the reservation resource element being reused
The resource element of the subgroup of element；
Wherein the multiple resource element includes the reservation resource element for carrying reference signal, wherein the reservation resource
Element is transmitted via multiple ports, and the control module is further configured to the reservation that will be transmitted via corresponding port
Resource element is linked at least one subgroup；
Downlink channel is physical downlink control channel PDCCH or physical down link sharing channel
PDSCH；
Above equipment further comprises transmitter module, the transmitter module be configured to the subgroup of resource element and
The instruction of the reservation resource element of carrying reference signal for the respective sub-set is transmitted to terminal；
The wherein described transmitter module is further configured to that the institute of the resource element of payload and reference signal will be carried
It states subgroup and is sent to the terminal.
In addition, the present invention similarly covers a kind of (terminal UE) equipment, which includes receiver module, is configured to connect
Transmission is received, which includes the reservation resource element of the subgroup of resource element and the carrying reference signal for the respective sub-set
The instruction of element；And control module, it is configured to determine at least one subgroup for being assigned to the terminal and determine for institute
State the resource element of the carrying reference signal of the subgroup of at least one distribution.
In such a device,
The control module is further configured to estimate letter based on the reference signal received in the resource element
Road, and it is based on the channel estimation, decoding includes described effective in the resource element of at least one subgroup
Load data.
Other systems can also benefit from principle provided herein, the resource element as long as them in time domain/frequency domain and
Speech has same or similar attribute.
The embodiment of the present invention can be implemented on software, hardware, using logic or the group of software, hardware and application logic
It closes.Software says from an angle using logic and/or hardware and resides at network-side (such as in eNB or its module), and from another
One angle, which is said, resides at terminal end (such as in user terminal/device, UE or its module).The example of UE may include terminal,
Such as mobile phone, personal digital assistant PDA or so-called smart phones.
In the exemplary embodiment, being maintained at the various conventional computers of any type using logic, software or instruction set can
It reads on medium.In the context of this file, " computer-readable medium " can be included, store, communicating, propagating or passing
It is defeated to instruct for or instruction execution system, device (such as computer or smart phone) or user equipment is combined to use
Any medium or device.
It is particularly related to but be not limited to mobile communication, such as it is not limited to LTE, and can advantageously (emit
In terms of device) it (can such as be connected in user equipment in 30 equipment of network transceivers (such as eNB) implementation and (in terms of receiver)
To the smart phone or personal computer of this network) in implement.That is, it can be used as chipset or in chipset
It is implemented on this device and/or its modem.
If desired, different function discussed herein can be executed by different order and/or simultaneously with one another.In addition, if
It needs, the one or more of above-mentioned function can be optional or can be combined.
Although the various aspects of the present invention are stated in the independent claim, other aspects of the invention include from described
Other combinations of the feature of the feature and independent claims of embodiment and/or dependent claims, and be not only to weigh
Profit those of is explicitly described combination in requiring.
Herein it is also pointed out that although above description example embodiments of the present invention, these descriptions are not construed as limitation and contain
Justice.Conversely, there exist several modifications and amendment that can be made without departing substantially from the scope of the invention defined by the appended claims.
The present invention is proposed for the method for supply resource Elemental partition, computer in the physical resource of downlink channel
Program product and equipment, wherein the physical resource of the downlink channel is provided in time domain and frequency domain, wherein each resource
Element is defined by the corresponding subcarrier bandwidth in the corresponding interval and frequency domain in time domain, and wherein by the first number in time domain
Consecutive intervals and frequency domain in multiple resource elements for defining of continuous subcarrier of the second number define respective resources element blocks,
The present invention relates to respective resources element blocks are divided into multiple resource element subgroups, and by the multiple resource element subgroup point
It is fitted at least two terminals.
Referred to as/breviary word list：
CCE control channel elements
CoMP cooperates with multicast/reception
CRS collective reference signals
CQI channel qualities indicate
DCI down link control informations
DMRS demodulation reference marks
E-PDCCH enhances physical downlink control channel
FDM frequency division multiplexings
LTE long term evolutions
M2M Machine To Machines
MIMO multiple-input and multiple-outputs
MTC machine type communications
MU-MIMO multiuser MIMOs
OFDM orthogonal frequency division multiplexing
PDA personal digital assistants
PDCCH physical downlink control channels
PDSCH physical down link sharing channels
PRB physical resource blocks
RE resource elements
RRC wireless heterogeneous networks
RS reference signals
R-PDCCH relays physical downlink control channel
SCID scrambler identity
TDM is time-multiplexed
UE user equipmenies
The prior art：
- RP-110457, Study on Downlink MIMO Enhancement for LTE-Advanced, 3GPP
TSG-RAN meeting #51, kansas, U.S.A city, 15-18 days in March, 2011
- Rl-104607, Discussion on PDCCH capacity consideringMU-MIMO, Samsung,
3GPP TSG RAN WG1 meeting #62, Madrid, ESP, in August, 2010 23-27 days
- Rl-111636, DL Control Channel Enhancement for DL MIMO in Rel-11, NTT
Docomo, 3GPP TSG RAN WG1 meeting #65, Barcelona, ESP, 9-13 days in May, 2011
- 3GPP TS36.216, Evolved Universal Terrestrial Radio Access (E-UTRA);
Operation, V10.3.0,2011 years June of Physical layer for relaying
- Rl-103084, PDCCH blind decoding in LTE-A, Huawei, 3GPP TSG RAN WG1 meetings #
61, Montreal, CAN, 10-14 days in May, 2010.
Claims (29)
1. a kind of method for supply resource Elemental partition, including：
The supply resource Elemental partition in the physical resource of downlink channel,
The physical resource of the wherein described downlink channel is provided in time domain and frequency domain,
Wherein each resource element is defined by the corresponding subcarrier bandwidth in the corresponding interval and frequency domain in time domain, and
It is wherein defined by the continuous subcarrier of the second number in the consecutive intervals and frequency domain of the first number in time domain multiple
Resource element defines respective resources element blocks,
The method further includes：
Respective resources element blocks are divided into multiple resource element subgroups,
The multiple resource element subgroup is distributed at least two terminals, and
Give one or more demodulated reference signal port assignments to each the multiple subgroup.
2. according to the method described in claim 1, the wherein described segmentation includes：
In the time domain, either in a frequency domain or in time domain and frequency domain, the boundary between resource element subgroup is defined.
3. according to the method described in claim 1, the wherein described segmentation includes：
The boundary between resource element subgroup is usually defined by the resource element centainly counted.
4. according to the method described in claim 2, wherein,
In the case that boundary between the subgroup is defined in the time domain, respective sub-set includes one or more of time domain
All resource elements in continuous resource element and frequency domain,
And the boundary between the subgroup, in the case of be defined in a frequency domain, respective sub-set includes one or more in frequency domain
All resource elements in a continuous resource element and time domain,
And the boundary between the subgroup, in the case of be defined in time domain and frequency domain, respective sub-set includes one in frequency domain
One or more of a or multiple continuous resource elements and time domain resource element.
5. according to the method described in claim 4, wherein,
One or more of resource elements in time domain are less than first number, and
One or more of resource elements in frequency domain are less than second number.
6. according to the method described in claim 3, wherein,
Respective resources element blocks include being excluded the special resource element of carrying payload and can be used for carrying payload
Resource element,
And number wherein based on the resource element that can be used for carrying payload and by the number of the subgroup of acquisition
Execute the segmentation.
7. method as claimed in any of claims 1 to 6, wherein
The multiple resource element includes the reservation resource element for carrying reference signal,
And it is wherein described to be divided into multiple subgroups to include respective resources element blocks：
Reuse the reservation resource element that reference signal is carried in respective sub-set.
8. according to the method described in claim 7, further comprising：
Reference signal is added to the resource element of the subgroup not comprising the reservation resource element being reused.
9. method as claimed in any of claims 1 to 6, wherein
The multiple resource element includes the reservation resource element for carrying reference signal, wherein the reservation resource element is via more
A port is transmitted, and is further comprised：
The reservation resource element transmitted via corresponding port is linked at least one subgroup.
10. according to the method described in claim 1, the wherein described downlink channel is physical downlink control channel
PDCCH or physical down link sharing channel PDSCH.
11. according to the method described in claim 9, further comprising：
The instruction of the reservation resource element of the subgroup of resource element and carrying reference signal for the respective sub-set is passed
Give terminal.
12. according to the method for claim 11, further comprising：
The subgroup for the resource element for carrying payload and reference signal is sent to the terminal.
13. a kind of method for enhancing physical downlink control channel E-PDCCH, including：
It receives and transmits in terminal, which includes the guarantor of the subgroup of resource element and the carrying reference signal for respective sub-set
The instruction of resource element is stayed, and
Determine at least one subgroup for being assigned to the terminal, and
Determine the resource element of the carrying reference signal of the subgroup at least one distribution,
Wherein one or more demodulated reference signal ports already are allocated to each subgroup.
14. according to the method for claim 13, further comprising：
Estimate channel based on the reference signal received in the resource element, and
Based on the channel estimation, the payload number for including in the resource element of at least one subgroup is decoded
According to.
15. a kind of computer readable storage medium can perform component including computer should when program is run on computers
Computer can perform component and be configured to execute according to any one of claim 1 to 12 or according in claim 13 to 14
Method described in any one.
16. a kind of equipment for supply resource Elemental partition, including control module, the control module are configured to：
The supply resource Elemental partition in the physical resource of downlink channel,
The physical resource of the wherein described downlink channel is provided in time domain and frequency domain,
Wherein each resource element is defined by the corresponding subcarrier bandwidth in the corresponding interval and frequency domain in time domain, and
It is wherein defined by the continuous subcarrier of the second number in the consecutive intervals and frequency domain of the first number in time domain multiple
Resource element defines respective resources element blocks,
The control module is further configured to：
Respective resources element blocks are divided into multiple resource element subgroups,
The multiple resource element subgroup is assigned to few two terminals, and
Give one or more demodulated reference signal port assignments to each the multiple subgroup.
17. equipment according to claim 16, wherein the control module is configured to：
In the time domain, either in a frequency domain or in time domain and frequency domain, the boundary between resource element subgroup is defined.
18. equipment according to claim 16, wherein the control module is configured to：
The boundary between resource element subgroup is usually defined by the resource element centainly counted.
19. equipment according to claim 17, wherein
In the case that boundary between the subgroup is defined in the time domain, respective sub-set includes one or more of time domain
All resource elements in continuous resource element and frequency domain,
And the boundary between the subgroup, in the case of be defined in a frequency domain, respective sub-set includes one or more in frequency domain
All resource elements in a continuous resource element and time domain,
And the boundary between the subgroup, in the case of be defined in time domain and frequency domain, respective sub-set includes one in frequency domain
One or more of a or multiple continuous resource elements and time domain resource element.
20. equipment according to claim 19, wherein
One or more of resource elements in time domain are less than first number, and
One or more of resource elements in frequency domain are less than second number.
21. equipment according to claim 18, wherein
Respective resources element blocks include being excluded the special resource element of carrying payload and can be used for carrying payload
Resource element,
And the wherein described control module be configured to based on it is described can be used for carry payload resource element number and
The number of the subgroup of acquisition is split.
22. the equipment according to any one of claim 16 to 21, wherein
The multiple resource element includes carrying the reservation resource element of reference signal, and the wherein described control module is configured to
The reservation resource element for carrying reference signal in respective sub-set by reusing, by the respective resources element blocks
It is divided into multiple subgroups.
23. equipment according to claim 22, wherein the control module is further configured to：
Reference signal is added to the resource element of the subgroup not comprising the reservation resource element being reused.
24. the equipment according to any one of claim 16 to 21, wherein
The multiple resource element includes the reservation resource element for carrying reference signal, wherein the reservation resource element is via more
A port is transmitted, and the control module is further configured to
The reservation resource element transmitted via corresponding port is linked at least one subgroup.
25. equipment according to claim 16, wherein the downlink channel is physical downlink control channel
PDCCH or physical down link sharing channel PDSCH.
26. equipment according to claim 24, further comprises transmitter module, which is configured to：
The instruction of the reservation resource element of the subgroup of resource element and carrying reference signal for the respective sub-set is passed
Give terminal.
27. equipment according to claim 26, wherein the transmitter is further configured to that payload and ginseng will be carried
The subgroup for examining the resource element of signal is sent to the terminal.
28. a kind of equipment for enhancing physical downlink control channel E-PDCCH, including：
Receiver module is configured to receive transmission, which includes the subgroup of resource element and holding for respective sub-set
The instruction of the reservation resource element of reference signal is carried, and
Control module is configured to：
Determine at least one subgroup for being assigned to the receiver module, and
Determine the resource element of the carrying reference signal of the subgroup at least one distribution, wherein one or more demodulation
Reference signal port already is allocated to each subgroup.
29. equipment according to claim 28, wherein the control module is further configured to：
Estimate channel based on the reference signal received in the resource element, and is based on the channel estimation, solution
The payload data that code includes in the resource element of at least one subgroup.
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| PCT/CN2011/078120 WO2013020268A1 (en) | 2011-08-08 | 2011-08-08 | Provisioning of resource element allocations within physical resources of a downlink channel |
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| WO2014142571A1 (en) * | 2013-03-13 | 2014-09-18 | 엘지전자 주식회사 | Method and device for reporting channel state information in wireless communication system |
| WO2016008152A1 (en) * | 2014-07-18 | 2016-01-21 | Nec Corporation | Method and apparatus for special subframe transmission |
| CN105491665B (en) * | 2014-09-15 | 2019-07-23 | 中兴通讯股份有限公司 | Pilot frequency collocation method and device |
| US10560235B2 (en) * | 2014-10-31 | 2020-02-11 | Qualcomm Incorporated | Narrowband control channel decoding |
| US10469222B2 (en) | 2014-12-16 | 2019-11-05 | Lg Electronics Inc. | Method and MTC device for transmitting DMRS for uplink data demodulation |
| CN105119851B (en) * | 2015-07-03 | 2018-11-09 | 魅族科技（中国）有限公司 | Wireless LAN communication method and equipment |
| CN110831222B (en) * | 2016-01-30 | 2023-03-24 | 上海朗帛通信技术有限公司 | Scheduling method and device |
| WO2018030243A1 (en) * | 2016-08-10 | 2018-02-15 | 株式会社Ｎｔｔドコモ | User terminal and wireless communication method |
| WO2018089878A1 (en) * | 2016-11-14 | 2018-05-17 | Intel Corporation | Precoding assignments for communication systems |
| CN110710286A (en) * | 2017-07-28 | 2020-01-17 | 中兴通讯股份有限公司 | Transmission and reception of demodulation reference signals |
| JP2021516886A (en) * | 2018-02-05 | 2021-07-08 | 日本電気株式会社 | Resource mapping methods and devices for data transmission, and data reception methods and devices |
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| CN101682335A (en) * | 2007-06-08 | 2010-03-24 | 三星电子株式会社 | Methods and apparatus for channel interleaving in OFDM systems |
| CN101816158A (en) * | 2007-10-02 | 2010-08-25 | 三星电子株式会社 | Method and apparatus for allocating resources of a control channel in a mobile communication system using orthogonal frequency division multiplexing |
| CN101924721A (en) * | 2009-06-10 | 2010-12-22 | 清华大学 | Method for determining downlink multi-access system transmission mode, transmitting end device and receiving end device |
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| WO2013020268A1 (en) | 2013-02-14 |
| DE112011105506T5 (en) | 2014-12-04 |
| DE112011105506B4 (en) | 2019-06-27 |
| CN103703846A (en) | 2014-04-02 |
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