CN104718715B - The transmission and reception of control information - Google Patents
The transmission and reception of control information Download PDFInfo
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- CN104718715B CN104718715B CN201380053919.0A CN201380053919A CN104718715B CN 104718715 B CN104718715 B CN 104718715B CN 201380053919 A CN201380053919 A CN 201380053919A CN 104718715 B CN104718715 B CN 104718715B
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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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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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
- H04B7/12—Frequency diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
Control information is received in a user device this disclosure relates to transmit control information in transmission/receiving point and be related to.Specifically, this disclosure relates to transmit the control information for user equipment, the user equipment receives down link control information by the downlink control channel of latest definition in the data area.Moreover, this disclosure relates to perform resource impact for the control channel unit (ECCE) of the enhancing of the physical downlink control channel (EPDCCH) of enhancing.
Description
Technical field
This disclosure relates to control information is transmitted at transmission/receiving point and is related to the reception control information at user terminal.
Especially, this disclosure relates to for the newest downlink control channel reception using (or restriction) in by data area
The method and apparatus (such as transmission/receiving point) of the user device transmissions control information of down link control information.Moreover, this public affairs
Open the method and apparatus (such as user equipment) being related to for receiving control information.
Background technology
Wireless communication system has been designed to：To multi-user transmission mass data perhaps.However, having due to control area
Limit resource and be difficult to the capacity for increasing wireless communication system.In order to overcome this limitation, it may be necessary to use and be located at data area
In downlink control channel with communicating downlink control information.
Meanwhile distribution of the typical control channel unit (CCE) with downlink control channel in control area is associated.
Strengthen control channel unit (ECCE) by newest restriction for allocation of downlink control channel in the data area.Therefore,
The Resource Allocation Formula associated with the ECCE of newest restriction may be needed.
The content of the invention
To the solution of problem
The present embodiment is to provide a kind of control of the enhancing for the downlink control channel transmission being used in the data area
Resource unit group (EREG) mapping method of Channel Elements (ECCE) processed/enhancing.Moreover, the present embodiment is that providing one kind is used for
The method and apparatus that ECCE indexs is performed in distributed " physical downlink control channel of enhancing " (EPDCCH) group.
According at least one embodiment, can provide it is a kind of be used in transmission/receiving point by two in subframe or
More Physical Resource Block (PRB) of person to method from data area to user device transmissions control information.Methods described can be with
Including：The control channel unit (ECCE) of enhancing is formed, wherein, the money in each in (i) two or more PRB pair
Source unit (RE) is indexed according to first frequency scheme by reusing 16 numerals, and (ii) has the resource unit of same index
(RE) be included in the resource unit group (EREG) of same enhancing, each in (iii) ECCE include from as different EREG
Index divided by 4 and 2 in one when there is corresponding to the different EREG indexes of same remainder 4 or 8 EREG, and (iv)
Each EREG included in ECCE is located in two or more PRB pair；And by least one in ECCE
To user device transmissions control information.
According to another embodiment, a kind of be used in a user device by two or more in subframe can be provided
Individual Physical Resource Block (PRB) to the data area method that receives from transmission/receiving point control information.Methods described can wrap
Include：Wireless signal is received by the control channel unit (ECCE) of at least one enhancing, wherein, (i) two or more PRB
Resource unit (RE) in each of centering is indexed according to first frequency scheme by reusing 16 numerals, and (ii) has
The resource unit (RE) of same index is included in the resource unit group (EREG) of same enhancing, each in (iii) ECCE
It is individual including from have as one in different EREG indexes divided by 4 and 2 corresponding to the different EREG indexes of same remainder 4 or
8 EREG of person, and each EREG included in (iv) ECCE is located in two or more PRB pair；And from
Control information is obtained in the wireless signal received.
According to another embodiment, a kind of be used for by two or more Physical Resource Block in subframe can be provided
(PRB) to transmission/receiving point from data area to user device transmissions control information.Transmission/the receiving point includes control
Processor and emitter.The control processor can be configured to form the control channel unit (ECCE) of enhancing.Here,
(i) resource unit (RE) in each in two or more PRB pair passes through reuse 16 according to first frequency scheme
Numeral is indexed, and (ii) has the resource unit group (EREG) that resource unit (RE) of same index is included in same enhancing
In, each in (iii) ECCE includes having same remainder not from as one in different EREG indexes divided by 4 and 2
With 4 or 8 EREG corresponding to EREG indexes, and each EREG included in (iv) ECCE positioned at two or
In more PRB pairs.The emitter can be configured as believing by least one control to user device transmissions in ECCE
Breath.
According to another embodiment, a kind of be used for by two or more Physical Resource Block in subframe can be provided
(PRB) to data area receive from transmission/receiving point the user equipment of control information.The user equipment can include receiving
Machine and control processor.The receiver can be configured as receiving by the control channel unit (ECCE) of at least one enhancing
Wireless signal, wherein, the resource unit (RE) in each in (i) two or more PRB pair leads to according to first frequency scheme
Cross and reuse 16 numerals to index, (ii) has the money that the resource unit (RE) of same index is included in same enhancing
In set of source (EREG), each in (iii) ECCE includes having from as one in different EREG indexes divided by 4 and 2
There are corresponding to the different EREG indexes of same remainder 4 or 8 EREG, and each in (iv) ECCE includes
EREG is located in two or more PRB pair.The control processor can be configured as from the wireless signal received
Obtain control information.
Brief description of the drawings
Fig. 1 is the schematic diagram for showing the wireless communication system that at least one embodiment can be applied to；
Fig. 2 show standard cyclic prefix (standard CP) in the case of a resource block pair, as Long Term Evolution (LTE)
Or the example of the structure of the down-chain resource in advanced LTE (LTE-A) system；
Fig. 3 shows the two kinds of EPDCCH transmission for including centralized EPDCCH transmission and distributed EPDCCH transmission；
Fig. 4 is shown uses the cyclic shift root based on symbol in the case of a transmission antenna port (CRS ports 0)
According to the Physical Resource Block (PRB) that EREG indexs program and is indexed to resource unit (RE) map；
Fig. 5 is shown and moved in the case of two transmission antenna ports (CRS ports 0 and 1) using the circulation based on symbol
Position maps according to the RE for the PRB pair that EREG indexs program and is indexed；
Fig. 6 shows and used in the case of four transmission antenna ports (CRS ports 0,1,2 and 3) based on symbol
Cyclic shift maps according to the RE for the PRB pair that EREG indexs program and is indexed；
Fig. 7 shows in the case of a transmission antenna port (CRS ports 0) root in the case of no cyclic shift
Mapped according to the RE for the PRB pair that EREG indexs program and is indexed；
Fig. 8 is shown a case that in the case of two transmission antenna ports (CRS ports 0 and 1) in no cyclic shift
The lower RE according to the PRB pair that EREG indexs program and is indexed maps；
Fig. 9 shows and not circulated in the case of four transmission antenna ports (such as CRS ports 0,1,2 and 3)
In the case of displacement according to the Physical Resource Block (PRB) that EREG indexs program and is indexed to RE map；
Figure 10 is shown to be configured according to the ECCE being configured with 2 ERRB distributed EPDCCH groups of embodiment 1；
Figure 11 is shown to be configured according to the ECCE in the distributed EPDCCH groups for being configured with 8 EPRB of embodiment 1；
Figure 12 shows the ECCE configurations in the distributed EPDCCH groups according to embodiment 2-1；
Figure 13 shows the ECCE configurations in the distributed EPDCCH groups according to embodiment 2-2；
Figure 14 shows the ECCE configurations in the distributed EPDCCH groups according to embodiment 2-3；
Figure 15 is to show the method for being used to transmit control information in transmission/receiving point according at least one embodiment
Flow chart；
Figure 16 is to show the flow chart for being used to receive the method for control information in a user device according to other embodiments；
Figure 17 is the schematic diagram for showing transmission/receiving point according to some embodiments；And
Figure 18 is the schematic diagram for showing the user equipment according to some embodiments.
Embodiment
Hereinafter, the exemplary embodiment of the present invention will be described in reference to the drawings.In the following description, it is although identical
Element is illustrated in different figures but identical element will be specified by same reference numeral.Moreover, under the present embodiment
In the description of face, being described in detail in when it does not know subject of the present invention for the known function that includes herein and configuration will be by
Omit.
It can be widely used according to the wireless communication system of at least one embodiment, in order to provide various communication services
Such as voice service, packet data service etc..Wireless communication system can include：User equipment (UE) and it is at least one transmission/
Receiving point.In this manual, term " user equipment (UE) " is used as the universal for including the terminal in radio communication.Cause
This, user equipment (UE) should be construed to include movement station (MS), user terminal (UT), subscriber station (SS) and/or whole world movement
Wireless device and WCDMA (WCDMA), Long Term Evolution (LTE) and/or high-speed packet in communication system (GSM) connect
Enter the concept of the user equipment used in (HSPA).
Transmission/receiving point can indicate the station to be communicated with user equipment.This transmission/receiving point is properly termed as different terms
Such as base station (BS), cell, Node-B, evolution Node-B (eNB), sector, website, base station transceiver system (BTS), access point
(AP), via node (RN), long distance wireless dateline (RRH), radio unit (RU) and antenna etc..
I.e., in this manual, base station (BS) or cell can be interpreted instruction by CDMA (CDMA)
A part of regions of covering such as eNB in Node-B, LTE or sector (website) in base station controller (BSC), WCDMA or
The containing concept of function.Therefore, the concept of transmission/receiving point, base station (BS) and/or cell can include various overlay areas,
Such as big cell, macrocell, Microcell, picocell, Femto cell etc..Moreover, this conception of species can include via node
(RN), the communication range of long distance wireless dateline (RRH) or radio unit (RU).
In this manual, user equipment and transmission/receiving point can be with the two transmission/reception master for containing meaning
Body, two transmission/reception main body be used for realize presently disclosed technology and technological concept, and can be not limited to concrete term or
Person's word.Moreover, user equipment and transmission/receiving point can be to be passed with the up-link or downlink for containing meaning
Defeated/to receive main body, the up-link or downlink transmission/reception main body are used to realize the disclosed skill relevant with the present invention
Art and technological concept, and concrete term or word can be not limited to.Herein, up-link (UL) is transmitted/is received as
Scheme wherein by data from user device transmissions to base station.Alternatively, downlink (DL) is transmitted number/is received as wherein
According to the scheme that user equipment is transferred to from base station.
Wireless communication system can use various Multiple Access schemes such as CDMA, time division multiple acess (TDMA), frequency division multiple access
(FDMA), OFDM (OFDMA), OFDM-FDMA, OFDM-TDMA, OFDM-CDMA etc..However, this Multiple Access scheme
Not limited to this.At least one embodiment can apply to evolving to LTE and LTE- by GSM, WCDMA and HSP
Resource allocation in advanced (LTE-A) asynchronous wireless communication field and evolve to CDMA, CDMA-2000 and UMB
Sychronous wireless communication field in resource allocation.The present invention be not construed as being limited by the specific wireless communications field or
Constraint, and all technical fields that the spirit that should be interpreted as including the present invention may apply to.
In the case of up-link transmission and downlink transmission, in time division multiplexing (TDD) and frequency division multiplexing (FDD)
It is at least one to be used.Herein, TDD can be transmitted using different time to perform uplink/downlink.
FDD can be transmitted using different frequency to perform uplink/downlink.
In the LTE or lte-a system consistent with corresponding standard, a carrier wave or a pair of carrier waves can be based on come structure
Build up-link and/or downlink., can be by control channel for example in the case of up-link and/or downlink
Physical downlink control channel (PDCCH), Physical Control Format Indicator Channel (PCFICH), physical mixed ARQ instruction channels
(PHICH), physical uplink control channel (PUCCH) etc. transmits control information.Data channel such as physics can be passed through
Downlink sharied signal channel (PDSCH), physical uplink link shared channels (PUSCH) etc. transmit data.
In this manual, the signal that term " cell " can indicate to transmit from transfer point or transmission/receiving point covers
One in lid, the component carrier with the covering and transmission/receiving point.Herein, term " transmission/receiving point " can be with
Indicate one in transfer point, the receiving point of reception signal of transmission signal and combinations thereof (i.e. transmission/receiving point).
Fig. 1 is the schematic diagram for showing the wireless communication system that at least one embodiment can be applied to.
Reference picture 1, wireless communication system 100 can be cooperative multipoint transmission/reception (CoMP) system, cooperation multi-antenna transmitting
One in defeated system and cooperation multi-cell communication systems.Here, CoMP system can be by between multiple transmission/receiving points
Cooperation carry out transmission signal.Such as CoMP system of wireless communication system 100 can include multiple transmission/receiving points 110 and 112 with
And at least one user equipment (UE) 120 and 122.
As illustrated, transfer point/receiving point can be transmission/receiving point (for example, eNB) 110 and transmission/receiving point (example
Such as, RRH) one in 112.Here, eNB 110 can be base station or macrocell (or grand node).RRH 112 can be logical
Optical cable or fiber coupling are crossed to eNB 110 come at least one picocell for controlling through a cable.In addition, RRH 112 is grand small
Can have large transmission power or low transmission power in area.Transmission/receiving point eNB 110 and RRH 112 can have identical
Cell ID (ID) or different districts mark.
Hereinafter, downlink (DL) can represent the communication from transmission/receiving point 110 and 112 to user equipment 120
Or communication path.Up-link (UL) can represent from user equipment 120 to the communication of transmission/receiving point 110 and 112 or
Communication path.In the downlink, emitter can be a part for transmission/receiving point 110 and 112, and receiver can be with
For a part for user equipment 120 and 122.In the uplink, emitter can be a part for user equipment 120, and
Receiver can be a part for transmission/receiving point 110 and 112.
Hereinafter, wherein transmitting or receiving letter such as PUCCH, PUSCH, PDCCH and/or PDSCH by channel
Number situation be properly termed as " transmission or the expression for receiving PUCCH, PUSCH, PDCCH and/or PDSCH ".
ENB (such as 110) can go to the downlink transmission of user equipment (such as 120 and/or 122).ENB (examples
As PDSCH corresponding with primary physical channel 110) can be transmitted, for unicast transmission.And eNB (such as 110) can be with
Transmit PDCCH, in order to communicating downlink control information (for example, for receiving the schedule information required for PDSCH) and
Transmit the scheduling authorization information for uplink data channel (such as PUSCH) transmission.Hereinafter, " transmission is passed through
Either reception signal " is properly termed as the expression of " transmission receives channel ".
In wireless communications, a radio frame can include 10 subframes, and when a subframe can include two
Gap.Radio frame can have 10ms length, and subframe can have 1.0ms length.Typically, the base of data transfer
Our unit can be subframe, and downlink scheduling or uplink scheduling can be performed in units of subframe.Marking
In the case of quasi- cyclic prefix (CP), a time slot can include 7 OFDM symbols in time domain.In the cyclic prefix of extension
(CP) in the case of, a time slot can include 6 OFDM symbols in time domain.
For example, the frequency domain in radio communication can be formed in units of the subcarrier with 15kHz intervals.
In the downlink, running time-frequency resource can determine so that resource block (RB) is unit.Resource block (RB) can include
180kHz (12 subcarriers) in a time slot and frequency axis in time shaft.Including " subcarrier in time shaft is (right
Should be in 2 time slots) " and the resource unit of " 12 subcarriers in frequency axis " be properly termed as " resource block is to (RBP) ".Resource block
Total quantity can be according to system bandwidth and different.
Resource unit (RE) can include a subcarrier in an OFDM symbol and frequency axis in time shaft.One
Resource block can include " 14 × 12 resource units " (in the case of standard CP) or " 12 × 12 resource lists to (RBP)
Member " (in the case of the CP of extension).
Fig. 2 show standard cyclic prefix (standard CP) in the case of a resource block to (RBP), as Long Term Evolution
(LTE) example of the structure of the down-chain resource or in advanced LTE (LTE-A) system.
Reference picture 2, in the case of standard cyclic prefix (CP), a resource block can include 14 OFDM to (RBP)
Symbol (l=0,1 ..., 13) and 12 subcarriers (k=0 ..., 11).In embodiment shown in figure 2, a resource block pair
(RBP) 14 OFDM symbols can be included.In 14 OFDM symbols, three OFDM symbols (l=0~2) above can be with
Indicated for control channel such as Physical Control Format Indicator Channel (PCFICH), physical mixed ARQ under channel (PHICH), physics
The correspondence of control area 210 of the distribution such as Uplink Control Channel (PDCCH).Remaining OFDM symbol (l=3~13) can with for
The correspondence of data channel 220 of data channel such as physical down link sharing channel (PDSCH) distribution.Although it is in fig. 2 control
Region 210 processed is assigned with three OFDM symbols, but can be that one to four OFDM is distributed in control area 210 according to embodiment
Symbol.The information relevant with the size of control area 210 can be shifted by PCFICH.Here, dimension information could be arranged to
The quantity of OFDM symbol.
PDCCH can be transmitted by whole system bandwidth, and PDSCH can be transmitted based on resource block.User equipment can
With PDCCH corresponding to identification (PDCCH for distributing to user equipment), and work as and data are not present (i.e. in corresponding PDCCH
Data for user equipment) when enter microsleep sleep mode.Therefore, it is possible to reduce work(of the user equipment in data area 220
Rate consumes.
Reference picture 2, reference signal can be mapped to the particular resource unit of downlink.I.e. public reference signal (or
Person's cell specific reference signal, hereinafter referred to as " CRS ") 230, (or UE is with particular reference to letter for demodulated reference signal (DM-RS)
Number) 232 and 234, channel state information reference signals (CSI-RS) etc. can be transmitted by downlink.In fig. 2, in order to
Description is convenient, illustrate only CRS 230 and DM-RS232 and 234.
CRS 230 in control area 210 can be used for performing the channel estimation for decoding PDCCH.Data area
CRS 230 in 220 can be used for downlink channel measurement.Data can be performed using DM-RS 232 and/or 234
The channel estimation of the data decoding in region 220.DM-RS 232 and 234 can be multiplexed with for multiple layers using orthogonal code
Reference signal.For example, in the case where 4 layers transmit, two different reference signals for each reference signal group can lead to
" in time shaft two with continuing reference to signal resource unit " is crossed and is applied to the orthogonal code of length " have 2 " to be multiplexed.
In the case where 8 layers transmit, four different reference signals for each reference signal group can be by that " will have 4 length
Orthogonal code " be applied to " four reference signal resource units being distributed in time shaft " to be multiplexed.
In the case of 1 layer of transmission or 2 layers of transmission, due to a DM-RS group (such as DM-RS groups 1 can be used only
(232) every layer of reference signal) is transmitted, so another DM-RS group (such as DM-RS groups 2 (234)) can be used for data biography
It is defeated.DM-RS corresponding with every layer can be according to the pre-coding scheme applied to every layer come precoding, and is transferred to user and sets
It is standby.Therefore, the feelings for the precoding information that receiving terminal (such as user equipment) can apply in no transmission end (such as base station)
Data decoding is performed under condition.
In order to effectively use limited resources in a wireless communication system, it may be necessary to control channel.However, control area
210 resource can be corresponding with overhead, and therefore reduces the resource of the data area 220 available for data transfer.
In LTE system based on OFDM, a resource block can include 14 or 12 OFDM symbols to (RBP).In OFDM symbol
In, most three OFDM symbols can be used for control area 210, and remaining OFDM symbol can be used for data area 220.
Meanwhile in it can transmit the lte-a system of data to more users, power system capacity enhancing can be due to typical control area
The limited resources of (such as 210) and be limited.Therefore, in order to increase control channel resource, it is contemplated that transmission/reception may be needed more
The method of user's control channel, such as space division multiplexing scheme is used in data area 220.In other words, this method can be
Transmission/reception control channel in data area 210.For example, the control channel transmitted in data area 220 is properly termed as " expanding
The PDCCH " of exhibition or " PDCCH " (EPDCCH) of enhancing, and not limited to this.
In typical (or existing) 3GPP LTE/LTE-A rel-8/9/10 systems, in order to receive downlink
DCI, " previous, two or three OFDM symbols " that all user equipmenies are determined by downlink subframe (are being
Regiment commander is wide>In the case of 10PRB) either " the first two, three or four OFDM symbols " (in system bandwidth≤10PRB feelings
Under condition) transmission PDCCH.Can be control channel unit for the PDCCH of the special user equipment base units transmitted
(CCE).Here, a CCE can include 9 resource unit groups (REG).One REG can include four companies in frequency axis
Continuous resource unit (RE).Specifically, a REG four continuous resource units (RE) can be descending corresponding to exclusion transmission
The money of different physical channels (such as PCFICH, PHICH) and physical signalling (such as CRS) in the PDCCH region of link subframe
Selected in the surplus resources unit (RE) of source unit (RE).
In order to perform be directed to special user equipment EPDCCH resource impacts, can use or limit in EPDCCH and
Typical PDCCH REG either enhancing REG (EREG) corresponding to CCE or enhancing CCE (ECCE).
It is different from above-mentioned old PDCCH, in the system associated with 3GPP LTE/LTE-A issues 11 and its subsequent issued
In it is newest can be in the downlink pilot in downlink subframe or specific sub-frame using the EPDCCH of (either limit)
It is allocated in the PDSCH region of gap (DwPTS).Moreover, 3GPPLTE/LTE-A issues 11 and its subsequent issued limit respective cell
Can be the user equipment K quantity of distribution for being configured as receiving down link control information (DCI) by EPDCCH
EPDCCH groups.Here, each EPDCCH groups can include " M " individual PRB groups." M " be more than or equal to " 1 " and less than or equal to it is descending
The natural number of the associated PRB of link bandwidth quantity.The maximum of " K " may be selected one in 2,3,4 and 6.Moreover,
Each in the multiple EPDCCH groups determined for giving user equipment can have different " M " numerical value.
Moreover, each EPDCCH groups can be determined that distributed (distributed) type and centralization
(localized) one in type, and signal is sent according to the type of determination.
EPDCCH groups can be corresponding with centralized type or distributed-type according to EPDCCH transport-types.For concentrating
For formula type, above-mentioned " M " can be 1 or 2n(n=1,2,3,4 or 5) and not limited to this.Meanwhile for distributed-type
For, " M " can be 2,4,8 or 16 and not limited to this.
Fig. 3 shows the two kinds of EPDCCH transmission for including centralized EPDCCH transmission and distributed EPDCCH transmission.
The quantity of downlink physical resource block (PRB) is properly termed as NPRB.Here, downlink PRB can be set up by leading to
The system bandwidth supported in the specific cell of letter supplier configuration.EPDCCH can be transmitted by corresponding PDSCH region.At this
In the case of kind, EPDCCH transport-type can be right with one in centralized EPDCCH transmission and distributed EPDCCH transmission
Should, as shown in Figure 3 a and Figure 3 b shows.Therefore, the quantity of one ECCE of ECCE structures and establishment resource unit (RE) can be according to every
Individual EPDCCH transport-types and it is different.Alternatively, the quantity of ECCE structures and each ECCE resource unit (RE) can nothing
Concern EPDCCH transport-types but identical.
Centralized EPDCCH transmission as shown in Figure 3 a can show an ECCE in a resource block to (such as one
PRB pair) in be placed and transmit.Distributed EPDCCH transmission as shown in Figure 3 b can show an ECCE at least two moneys
Source block is to being placed and transmitting in (such as two PRB pairs).
Meanwhile the EPDCCH groups that a user equipment distributes K quantity can be directed to.In this case, due to each
EPDCCH groups are distributed-type or centralized type, it is possible to distribute K for a user equipmentLIndividual quantity
Centralized EPDCCH groups and KDThe distributed EPDCCH groups of individual quantity.That is KLAnd KDSummation can be " K " (KL+KD=K).
In the case of the EREG/ECCE of newest restriction, it can include altogether in a PRB pair of each EPDCCH groups
16 EREG (such as EREG#0 to EREG#15).Specifically, a PRB pair can include 16 EREG altogether, and nothing concerns
(i) frame structure type, (ii) sub-frame configuration, the length of (iii) cyclic prefix (CP), the chi of (iv) old PDCCH control areas
It is very little, and/or (v) whether there is other reference signals (such as CRS, CSI-RS, PRS etc.) in addition to DM-RS.
More specifically, in the case of standard cyclic prefix (CP), a PRB pair in some EPDCCH group can wrap
Include 168 resource units (RE) (for example, 12 × 14=168 RE) altogether.In such a case, it is possible to for being provided from 168
Surplus resources unit (RE) in source unit (RE) outside discharge " 24 resource units (RE) for being used for DM-RS " (such as 144
RE) EREG is performed to index.In other words, index can be according to first frequency scheme (i.e. frequency and then time mode first) by EREG
Performed using 16 numerals (such as 0,1,2 ..., 15).Therefore, corresponding resource unit (RE) can be numbered (i.e. from 0 to 15
Index).Similarly, in the case of the cyclic prefix (CP) of extension, a PRB pair in some EPDCCH group can include total
Totally 144 resource units (RE) (for example, 12 × 12=144RE).In such a case, it is possible to from 144 resource units (RE)
Surplus resources unit (RE) (such as 128 RE) outside middle discharge " 16 resource units (RE) for being used for DM-RS " performs
EREG indexs.In other words, EREG, which indexs, to use 16 according to first frequency scheme (i.e. frequency and then time mode first)
Individual numeral (such as 0,1,2 ..., 15) performs.Therefore, corresponding resource unit (RE) numbering (can be compiled into rope from 0 to 15
Draw).
In the downlink subframe (" standard DL subframe ") with standard cyclic prefix (CP), reference picture 4 to Fig. 9 is come
Describe to index the associated embodiment of program with the EREG for a PRB pair in some EPDCCH group.In Fig. 4 to Fig. 9
In, it can represent the resource unit (RE) for DS-RS, and the folding of the skew with numeral without digital skew broken line part
Line part or dot pattern part can represent the resource unit (RE) for CRS transmission.
Fig. 4 is shown and moved in the case of a transmission antenna port (such as CRS ports 0) using the circulation based on symbol
Position according to EREG index procedure index Physical Resource Block (PRB) to resource unit (RE) map.
Reference picture 4, EREG can be numbered from 0 to 15 according to first frequency scheme (i.e. frequency and then time mode first)
(indexing).In the embodiment show in figure 4, the cyclic shift based on symbol can be used to be indexed to perform.More specifically
For, as shown in figure 4, the resource unit (RE) pointed out in the first symbol by " 400 " be indexed for 11 (indexing 11) it
Afterwards, the neighbouring RE pointed out in the second symbol by " 410 " is successively indexed as 12 (indexing 12).In the same manner, exist
The resource unit (RE) pointed out in second symbol by " 420 " is indexed as after 7 (indexing 7), in the 3rd symbol by
The neighbouring RE that " 430 " are pointed out successively is indexed as 8 (indexing 8).
The Physical Resource Block (PRB) shown in Fig. 4 is to can be associated with CRS ports 0.As shown in figure 4, CRS can be by
It is mapped to 8 resource units (RE).In other embodiments, CRS can be mapped to according to frequency shift and be in other positions
The RE put.
Fig. 5 is shown in the case of two transmission antenna ports (such as CRS ports 0 and 1) using following based on symbol
Ring displacement according to EREG index procedure index Physical Resource Block (PRB) to resource unit (RE) map.Fig. 6 is shown
Used in the case of four transmission antenna ports (such as CRS ports 0,1,2 and 3) based on the cyclic shift of symbol according to EREG
The RE mappings of program of indexing and the PRB pair that is indexed.
It can use in the same manner as in figure 4 based on the cyclic shift of symbol the money that is shown in the Fig. 5 and Fig. 6 that indexs
Source unit (RE).In Fig. 5, CRS can be directed to CRS ports 0 and 1 and be mapped to and " 8 extra RE " and " be used in Fig. 4 show
The CRS gone out RE ".In figure 6, CRS can be directed to CRS ports 0,1,2, and 3 and be mapped to " 8 extra RE " and
" it is used in Fig. 5 the CRS RE " shown.
In the case where each OFDM symbol execution EREG indexs, Fig. 4 to Fig. 6 shows the implementation that cyclic shift is applied to
Example, and Fig. 7 to Fig. 9 shows the embodiment that cyclic shift is not applied to.
Fig. 7 is shown a case that in the case of a transmission antenna port (such as CRS ports 0) in no cyclic shift
The lower RE according to the PRB pair that EREG indexs program and is indexed maps.Fig. 8 is shown in two transmission antenna port (examples
Such as CRS ports 0 and 1) according to the PRB that EREG indexs program and is indexed in the case of no cyclic shift in the case of
To RE map.Fig. 9 shows and not followed in the case of four transmission antenna ports (such as CRS ports 0,1,2 and 3)
Ring shift in the case of according to the Physical Resource Block (PRB) that EREG indexs program and is indexed to RE map.
In Fig. 7 to Fig. 9, CRS mapping can be performed in a manner of with Fig. 4 to Fig. 6 identicals.However, used volume
Index scheme can be different.
Typically, reference picture 7, can be incited somebody to action according to first frequency scheme (i.e. frequency and then time mode first) from 0 to 15
EREG numbers (indexing).In the embodiment show in figure 7, can be held in the case where being not based on the cyclic shift of symbol
Row is indexed.More specifically, as shown in fig. 7, the resource unit (RE) pointed out in the first symbol by " 700 " be indexed for
After 11 (indexing 11), in the second symbol by the RE that " 710 " are pointed out continued index be 12 (indexing 12).Here, compile
Index for 12 RE (" 710 ") (i.e. with next corresponding RE (" 710 ")) not with index it is adjacent for 11 RE (" 700 ").
In the same manner, the RE pointed out in the second symbol by " 720 " is indexed as after 7 (indexing 7), in the 3rd symbol by
The RE that " 730 " are pointed out is 8 (indexing 8) by successively index.Here, index for 8 RE (" 730 ") (i.e. with it is next corresponding
RE (" 730 ")) not be indexed it is adjacent for 7 RE (" 720 ").
In Fig. 4 to Fig. 9, the RE with same index can be divided into an EREG.Therefore, in the feelings of a PRB pair
Under condition, 16 EREG (for example, EREG#0 to EREG#15) altogether can be distributed.Fig. 4 to Fig. 9 is shown and the PRB with standard CP
To associated embodiment.That is, a PRB pair with standard CP can include 16 EREG altogether.Similarly, with extension
In the case of a CP PRB pair, 16 EREG (for example, EREG#0 to EREG#15) altogether can be distributed.That is, there is extension
A CP PRB pair can include 16 EREG altogether.
According to Fig. 4 to Fig. 9, in the EREG (for example, EREG#0, EREG#1 ..., EREG#15) configured in a PRB pair
Each can include 9 RE.However, as shown in Fig. 4 to Fig. 9, the quantity of the RE that can be used for EPDCCH transmission per EREG can
It is different with the quantity according to transmission antenna port (or CRS port numbers) and the size of old PDCCH control areas.
Fig. 4 is returned to, RE corresponding with index #0 total quantity is 9.However, with " first three OFDM symbol " (l=0~
2) in the case that associated region is confirmed as control area, the RE that control area includes can not transmit EPDCCH, and
And these RE are therefore excluded in the RE transmitted available for EPDCCH.Therefore, EREG#0 can include 6 available RE altogether.
In the case of EREG corresponding with index #1, the sum for being indexed as #1 RE is 9.In such a case, it is possible to exclude (i)
RE that RE and (ii) CRS in control area (such as region associated with first three OFDM symbol) are mapped to (for example,
The RE pointed out in Fig. 4 by " 440 ").Therefore, EREG#1 can include 5 available RE of sum.
Each ECCE corresponding with the elementary cell of EPDCCH transmission can be according to subframe type and CP length and including " N "
The EREG of individual quantity.More specifically, N numerical value can be identified below.
In at least one embodiment, configured in the standard subframe of (i) with standard CP and (ii) with specific sub-frame
In the case of 3,4 or 8 specific sub-frame and standard CP, N numerical value can be determined that " 4 " (N=4).In other words, this
In the case of, if including 16 EREG in a PRB pair, altogether 4 can be configured because each ECCE includes 4 EREG
Individual ECCE.
In other embodiments, in the standard subframe of (i) with extension CP, (ii) with specific sub-frame configuration 1,2,6,7
Either 9 specific sub-frame and standard CP and (iii) have specific sub-frame configure 1,2,3,5 or 6 specific sub-frame and
In the case of extending CP, N numerical value can be determined that " 8 " (N=8).In other words, in this case, if in a PRB pair
Include 16 EREG, then can configure 2 ECCE altogether because each ECCE includes 8 EREG.
In the case of particular downlink subframe (such as standard DL subframe), can by " above one, two or
Either " the first two, three or four OFDM symbols " transmit typical PDCCH to three OFDM symbols ".Moreover, a CCE can
With including 9 REG.Therefore, the CCE in PDCCH can include 36 (=9 × 4) individual RE.
However, as described in reference picture 4 to Fig. 9, in the case of EPDCCH, old control area can not accounted for
Size (size of i.e. old PDCCH region) and for other reference signals such as CRS and CSI-RS RE in the case of with every
RE indexs to perform EREG.Therefore, the quantity available for the RE of EPDCCH transmission can be according to the size of old control area
Presence with other reference signals (such as CRS, CSI-RS etc.) in particular downlink subframe and it is different.In other words, can use
Can be different with every EREG in the RE of EPDCCH transmission quantity.Therefore, corresponding with the base unit that EPDCCH is transmitted
In the case of ECCE, it is understood that there may be the available RE quantity RE different with every ECCE is uneven.
In order to overcome this problem, the present embodiment can provide a kind of mapping method for the EREG for setting up each ECCE.Tool
Body, the present embodiment can provide a kind of be used in the middle execution of distributed EPDCCH groups (i.e. the EPDCCH groups of distributed-type)
The method of ECCE/EREG mappings (or being properly termed as " ECCE to EREG mappings ").
In the case where distributed EPDCCH is transmitted, in order to maximize frequency diversity gain, ECCE EREG is set up
The PRB pair for the M quantity that EPDCCH groups corresponding to being distributed to include can be configured as.In view of this situation, this implementation
Example can provide a kind of method for being used to perform ECCE/EREG mappings in distributed EPDCCH groups.
More specifically, the present embodiment can provide a kind of M number for being used for configuration and forming above-mentioned distributed EPDCCH groups
The method of each ECCE in the PRB pair of amount.Specifically, the present embodiment can contemplate by all downlink subframes and specific
Down link pilot timeslot (DwPTS) in subframe and the old PDCCH and CRS transmitted.Therefore, the present embodiment can be by examining
Relatively optimal ECCE/EREG mapping methods can be provided with RE quantity for EPDCCH transmission in PRB pair corresponding to worry.
Reference picture 4 arrives Fig. 9, in the EREG configured in a PRB pair (such as EREG#0, EREG#1 ..., EREG#15)
Each can include 9 RE.However, as shown in Fig. 4 to Fig. 9, the quantity of the available RE per EREG can be based on CRS ports
Quantity and the sizes of old PDCCH control areas determine.Here, be able to can be represented to can be used for EPDCCH transmission with RE
RE.In EPDCCH set according to old PDCCH control areas size and corresponding with standard down link subframe as shown in Figure 4
The configuration of CRS ports is come in the case of configuring, table 1 and table 3 below can be represented in the PRB pair that EPDCCH set includes
Every EREG indexes available RE quantity.
[table 1]
| CRS ports 0 | CRS ports 0,1 | CRS ports 0,1,2,3 | |
| EREG#0 | 7 | 6 | 6 |
| EREG#1 | 8 | 8 | 7 |
| EREG#2 | 7 | 7 | 7 |
| EREG#3 | 7 | 6 | 6 |
| EREG#4 | 8 | 8 | 8 |
| EREG#5 | 8 | 7 | 7 |
| EREG#6 | 8 | 8 | 7 |
| EREG#7 | 8 | 8 | 7 |
| EREG#8 | 7 | 7 | 7 |
| EREG#9 | 8 | 8 | 8 |
| EREG#10 | 7 | 6 | 6 |
| EREG#11 | 8 | 7 | 7 |
| EREG#12 | 9 | 9 | 8 |
| EREG#13 | 8 | 7 | 7 |
| EREG#14 | 9 | 9 | 9 |
| EREG#15 | 9 | 9 | 9 |
In the case where the size of old PDCCH control areas is " 1 " individual OFDM symbol, table 1 above can represent root
According to the configuration of each CRS ports, every EREG, available resource units (RE) quantity.Here, table 1 above is based on circulation shifting
The position EREG indexes that are not applied to create.
[table 2]
| CRS ports 0 | CRS ports 0,1 | CRS ports 0,1,2,3 | |
| EREG#0 | 6 | 5 | 5 |
| EREG#1 | 7 | 7 | 6 |
| EREG#2 | 6 | 6 | 6 |
| EREG#3 | 6 | 5 | 5 |
| EREG#4 | 7 | 7 | 7 |
| EREG#5 | 7 | 6 | 6 |
| EREG#6 | 7 | 7 | 6 |
| EREG#7 | 7 | 7 | 6 |
| EREG#8 | 7 | 7 | 7 |
| EREG#9 | 8 | 8 | 8 |
| EREG#10 | 7 | 6 | 6 |
| EREG#11 | 8 | 7 | 7 |
| EREG#12 | 8 | 8 | 7 |
| EREG#13 | 7 | 6 | 6 |
| EREG#14 | 8 | 8 | 8 |
| EREG#15 | 8 | 8 | 8 |
In the case where the size of old PDCCH control areas is " 2 " individual OFDM symbol, table 2 above can represent root
According to the configuration of each CRS ports, every EREG, available resource units (RE) quantity.Here, table 2 above is based on circulation shifting
The position EREG indexes that are not applied to create.
[table 3]
| CRS ports 0 | CRS ports 0,1 | CRS ports 0,1,2,3 | |
| EREG#0 | 5 | 4 | 4 |
| EREG#1 | 6 | 6 | 5 |
| EREG#2 | 5 | 5 | 5 |
| EREG#3 | 5 | 4 | 4 |
| EREG#4 | 7 | 7 | 7 |
| EREG#5 | 7 | 6 | 6 |
| EREG#6 | 7 | 7 | 6 |
| EREG#7 | 7 | 7 | 6 |
| EREG#8 | 6 | 6 | 6 |
| EREG#9 | 7 | 7 | 7 |
| EREG#10 | 6 | 5 | 5 |
| EREG#11 | 7 | 6 | 6 |
| EREG#12 | 7 | 7 | 6 |
| EREG#13 | 6 | 5 | 5 |
| EREG#14 | 7 | 7 | 7 |
| EREG#15 | 7 | 7 | 7 |
In the case where the size of old PDCCH control areas is " 3 " individual OFDM symbol, table 3 above can represent root
According to the configuration of each CRS ports, every EREG, available resource units (RE) quantity.Here, table 3 above is based on circulation shifting
The position EREG indexes that are not applied to create.
Table 3 is arrived with reference to table 1, it is known that RE per EREG, available for EPDCCH transmission quantity can be different.It is therefore, every
EREG available RE quantity can be different according to the scheme that EREG is distributed for ECCE.
In view of this situation, the present embodiment can provide ECCE/EREG mapping methods in distributed EPDCCH groups.
In the case where specific EPDCCH groups include the PRB pair of M quantity, in order to typically (or existing)
PRB corresponding to the unit of PDSCH transmission is distinguished, and PRB pair related to the present embodiment is properly termed as the " physical resource of enhancing
Block (EPRB) ".EPRB indexes can be expressed as EPRB#m.More specifically, the EPRB of M quantity can be set up
The incremental order of the index (i.e. PRB indexes) of the PRB pair of EPDCCH set is from EPRB#0 numberings (indexing) to EPRB# (M-
1).In other words, can perform successively including being indexed from minimum PRB pair to the EPRB of maximum PRB pair.Here, minimum PRB pair can
Think the PRB pair with minimum PRB indexes, and maximum PRB pair can be the PRB pair with maximum PRB indexes.
Embodiment 1
In the case where distributed EPDCCH is transmitted, embodiment 1 can be provided for maximizing and important performance index pair
The method for the frequency diversity gain answered.More specifically, in embodiment 1, M quantity is included in distributed EPDCCH set
In the case of EPRB, each set up in the ECCE of distributed EPDCCH set can pass through N according to two following conditions
The distributed EPRB of individual quantity is configured.
" in the case of condition 1-1 " (i.e. N >=M), each ECCE can be mapped to every EPRB EREG'sNumber
Amount, and N can be mapped to for the EPRB (i.e. EPRB#m, for m=0,1,2 ... ..., M-1) of M quantity by sum
The EREG of individual quantity.Here, each ECCE can include the EREG of N number of quantity.
In " condition 1-2 " (i.e. N<M in the case of), each ECCE can be mapped to every mono- EREG of EPPRB.Therefore,
Each ECCE can be mapped to the corresponding EPRG of N number of quantity by the total distributed EPRB for N number of quantity.Here,
Each ECCE can include the EREG of N number of quantity.The corresponding EPRB of N number of quantity can corresponding with foring EPDCCH groups
It is in the EPRB of M quantity, haveThe EPRB of N number of quantity at individual EPRB interval is corresponding.
For example, two PRB pairs (M=2) can be assigned in the standard down link with standard cyclic prefix (CP)
In subframe distributed EPDCCH groups are configured for " EPDCCH user equipmenies ".Here, EPDCCH user equipmenies represent EPDCCH set
The user equipment being applied to., can be with the incremental order of corresponding PRB indexes in this case (i.e. in the case of M=2)
Perform two PRB pairs of EPDCCH groups corresponding to foring successively from minimum PRB pair (PRB pair i.e. with minimum PRB indexes)
Program of indexing.Therefore, two PRB pairs can be indexed as EPRB#0 and EPRB#1 respectively.In this case, with
The quantity that ECCE EREG is formed in standard CP standard down link subframe can be 4 (N=4).Therefore, each ECCE
Can be configured according to above-mentioned condition 1-1 using 4 EREG, 4 EREG include (i) distributed in EPRB#0 2 (=
4/2) 2 EREG that individual EREG and (ii) are distributed in EPRB#1.
Figure 10 is shown to be configured according to the ECCE being configured with 2 EREG distributed EPDCCH groups of embodiment 1.
Reference picture 10, distributed EPDCCH groups can include 2 PRB pairs, such as EPRB#0 and EPRB#1.Each ECCE can
To be configured according to above-mentioned condition 1-1 using 4 EREG, 4 EREG include 2 that (i) is distributed in EPRB#0
2 EREG that EREG and (ii) are distributed in EPRB#1.
In other embodiments, 8 PRB pairs (M=8) can be assigned in the standard down chain way with standard CP
It is EPDCCH user device configuration distribution EPDCCH groups in frame.Here, EPDCCH user equipmenies represent what EPDCCH was applied to
User equipment., can be with the incremental order of corresponding PRB indexes from minimum in this case (i.e. in the case of M=8)
PRB pair (PRB pair i.e. with minimum PRB indexes) perform successively form corresponding to 8 PRB pairs of EPDCCH groups index
Program.Therefore, 8 PRB pairs can be indexed as EPRB#0, EPRB#1 ... ..., EPRB#7 respectively.Even in this case,
The quantity that ECCE EREG is set up in the standard down link subframe with standard CP can be 4 (N=4).Therefore, often
Individual ECCE can be configured by selecting an each distributed EPRB EREG.Here, distributed EPRB can withEPRB interval N (N=4) individual quantity EPRB it is corresponding.In other words, 4 EREG can be mapped, for
ECCE corresponding to transmission.More specifically, an ECCE can be configured using 4 EREG, 4 EREG include (i) from
The EREG selected in EPRB#0, the EREG that (ii) selects from EPRB#2, (iii) selected from EPRB#4 one
EREG, and the EREG that (iv) selects from EPRB#6.Alternatively, an ECCE can be configured using 4 EREG,
4 EREG include (i) EREG, EREG that (ii) selects from EPRB#3 for being selected from EPRB#1, (iii) from
The EREG selected in EPRB#5, and the EREG that (iv) selects from EPRB#7.
Figure 11 is shown to be configured according to the ECCE in the distributed EPDCCH groups for being configured with 8 EPRB of embodiment 1.
Reference picture 11, distributed EPDCCH groups can include 8 PRB pairs with EPRB#0 to EPRB#7.Such as Figure 11 institutes
Show, ECCE can be according to condition above 1-2 by be each in EPRB#0, EPRB#2, EPRB#4 and EPRB#4
Individual distribution one EREG is configured.
Embodiment 2
In order to configure an ECCE in distributed EPDCCH groups, EREG systems of selection (are used in corresponding EPRB
Selection EREG (or multiple EPRB) method) it is defined together with the EPRB mapping methods described in example 1 above.Here,
There is provided using the combination of " EREG systems of selection " and " the EPRB skip philosophies of embodiment 1 " according to three following embodiments
ECCE/EREG mapping methods.
Embodiment 2-1
Such as first embodiment, corresponding ECCE, which can be used, " has the EREG " of same index to configure, the EREG is selected from
It is mapped as configuring an ECCE each EPRB according to embodiment 1.More specifically, in order to configure an ECCE, in condition
In the case of 1-1, it can map every EPRB'sThe EREG of individual quantity.Meanwhile in the case of condition 1-2, it can map every
An EPRB EREG.In these cases, each ECCE " can have same index by being mapped in each EPRB
EREG " is configured.It can be come with the order of minimum EREG indexes and (ii) EPRB indexes (i) associated with each ECCE to shape
Sum into corresponding EPDCCH groups isIndividual quantity ECCE (such as ECCE#i,
) indexed.In other words, mapped in ECCE according to the EPRB of example 1 above come in the case of configuring, can from choosing
Minimum EREG in self-corresponding EPRB (EPRB determined according to embodiment 1 in the case of each ECCE) EREG is (i.e.
The EREG of EREG indexes with minimum) associated ECCE performs ECCE and indexs successively.I.e., it is possible to from ECCE#0 to corresponding
ECCE be numbered (index) successively.Moreover, the different EPRB that N number of quantity is mapped in each ECCE are such as associated with
Such and selected from the EPRB for foring each corresponding ECCE EREG indexes are between ECCE described in condition above 1-2
In the case of identical, ECCE indexs the ECCE that may begin at and be mapped to minimum EPRB indexes.In corresponding EPDCCH groups
Middle formation ECCE#i EREG can determine according to following formula 1 and formula 2.
[formula 1]
ForAnd N >=M,
ECCE#i={ EPRB#m EREG#n }
In equation 1, m=0,1 ..., M-1, andHere,
[formula 2]
ForAnd N ＜ M,
ECCE#i={ EPRB#m (a) EREG#n (i) }
In formula 2,Wherein, a=0,1 ..., N-1, andThis
In, [x] represents the maximum integer no more than x.
Figure 12 shows the ECCE configurations in the distributed EPDCCH groups according to embodiment 2-1.
In fig. 12, the quantity (" N ") for setting up ECCE EREG can be " 4 " (N=4), " i " corresponding with ECCE indexes
(i.e. ECCE index #i) can be " 0 " (i=0).
Figure 12 a show the ECCE configurations according to formula 1 above.Reference picture 12a, set up the EPRB of EPDCCH groups quantity
(" M ") can be " 2 " (M=2).If the numerical value (such as N=4, i=0, and M=2) of this variable is applied to formula 1, thenAndTherefore, ECCE#0 can be { EPRB#0 and EPRB#1
EREG#0 and EREG#1 }.In other words, as figure 12 a shows, ECCE#0 can use (i) be selected from EPRB#0 ERGE#0 and
EREG#1 and (ii) are selected from EPRB#1 ERGE#0 and EREG#1 to configure.
Figure 12 (b) shows the ECCE configurations according to formula 2 above.Reference picture 12b, set up the EPRB of EPDCCH groups quantity
(" M ") can be " 8 " (M=8).If the numerical value (such as N=4, i=0, and M=8) of this variable is applied to formula 2, thenAndIt is right
In a=0,1,2,3, m (a)={ 0,2,4,6 }.Therefore, ECCE#0 can be { EPRB#0, EPRB#2, EPRB#4 and EPRB#6
EREG#0.In other words, as shown in Figure 12b, ECCE#0 can use (i) to be selected from EPRB#0 ERGE#0, and (ii) is selected from
EPRB#2 ERGE#0, (iii) is selected from EPRB#4 EREG#0 and (iv) is selected from EPRB#6 EREG#0 and configured.
Embodiment 2-2
In another embodiment, corresponding ECCE, which can be used, " has the EREG " that displacement indexes to configure, the EREG
Selected from each EPRB for being mapped as configuring an ECCE according to embodiment 1.According to embodiment 1, specific ECCE EREG is set up
The jump size for the EPRB indexes being selected from can correspond to (i) EPRB (in the case of superincumbent condition 1-1) or
(ii)The EPRB of individual quantity (in the case of only superincumbent condition 1-2).
Hereinafter, it will combine and (such as size of jumping) is described above to specifically describe the present embodiment.In distribution
, can be in M quantity in the case that EPDCCH groups are made up of the EPRB (such as EPRB#0 to EPRB# (M-1)) of M quantity
Program is jumped by EPRB in EPRB and is used for the EPRB (that is, the EPRB that EREG is selected from) of EREG selections to map and (determine).This
In, EPRB jumps program may begin at EPRB#0 EREG#0 and can be with the condition according to example 1 above
Jump size.EREG for ECCE configuration can select an EREG (i.e. by from passing through by the EPRB of every mapping
EPRB jumps program and selects an EREG in each in the EPRB that maps) determine.Specifically, in this case,
No matter when EPRB jump (reference picture 9b) is performed, and the EREG indexes selected from corresponding EPRB can increase " 1 ".If
Map the N for configuring specific ECCEthLast EPRB (the i.e. maximums of EPDCCH groups corresponding to foring are reached before EREG
EPRB), then can be by successively being performed using the cyclic shift that again return to the first EPRB (i.e. minimum EPRB)
EREG maps.
In other words, in the case where being " 1 " according to the jump size of example 1 above, i.e., in N >=M (such as N=4 and M
=3) in the case of, EREG#0 can be selected from EPRB#0, and EREG#1 can be selected from EPRB#1, and EREG#2 can be selected from EPRB#2.
After EPRB#0 is again returned to, EREG#3 can be selected from EPRB#0.Therefore, the total EPRB for M quantity can be passed through
To select and map the EREG of N number of quantity.Specifically, in N>In the case of M, once either can repeatedly select EPRB (or
Multiple EPRB).
, can be from next when for when selecting the EREG of N number of quantity the first ECCE/EREG to map completion as described above
EPRB performs the 2nd ECCE/EREG mappings.More specifically, can be mapped by EPRB jump programs and EREG option programs
2nd ECCE.Here, EPRB jumps program may begin at EPRB#1 EREG#0 and (be used for identical jump size
The jump size of first ECCE/EREG mappings).EPRB for the 2nd ECCE mapping can jump program come really by EPRB
It is fixed.Sum for the 2nd ECCE configuration can select an EREG for the EREG of N number of quantity by the EPRB of each determination
To determine and (select).Specifically, in this case, EPRB jumps no matter when are performed, selected from " corresponding EPRB " is (i.e. logical
Cross EPRB jump program determine each EPRB) EREG indexes can increase " 1 ".In the same manner, for MthECCE is (i.e.
ECCE# (M-1)) the EREG mappings of configuration may begin at EPRB# (M-1) EREG#0.Here, EPRB# (M-1) can be with
The last EPRB that corresponding EPDCCH groups include is corresponding.
It is completed as previously described when the first round (ECCE/EREG i.e. for ECCE#0 to ECCE# (M-1) configuration maps)
When, each EREG included in all EPRB (such as EPRB#0 to EPRB# (M-1)) of EPDCCH groups corresponding to formation
(such as EREG#0 to EREG# (N-1)) can be used for ECCE#0 to ECCE# (M-1) mapping.Hereafter, in the same manner, second
Wheel (ECCE/EREG i.e. for ECCE#M to ECCE# (2M-1) configuration maps) may begin at EPRB#0 EREG#N.Cause
This, can map ECCE#M to ECCE# (2M-1) by the second wheel.
When performing in the above described manner according to N numerical valueDuring wheel, the sum that can map EPDCCH groups corresponding to being formed isThe ECCE of individual quantity.
Can be by following according to the ECCE/EREG mapping methods of the embodiment 2-2 configuration for distributed EPDCCH groups
Formula 3 and formula 4 express.
[formula 3]
ForAnd N >=M,
ECCE#i={ EPRB#m (a) EREG#n (a) }
In equation 3, for a=0,1 ..., N-1, andAndHere, [x] represents the maximum integer no more than x..
[formula 4]
ForAnd N ＜ M,
ECCE#i={ EPRB#m (a) EREG#n (a) }
In formula 4, for a=0,1 ..., N-1,And
AndHere, [x] represents the maximum integer no more than x.
Figure 13 shows the ECCE configurations in the distributed EPDCCH groups according to embodiment 2-2.
In fig. 13, the quantity (" N ") for setting up ECCE EREG can be " 4 " (N=4), " i " corresponding with ECCE indexes
(i.e. ECCE index #i) can be " 0 " (i=0).
Figure 13 a show the ECCE configurations according to formula 3 above.Reference picture 13a, set up the EPRB of EPDCCH groups quantity
(" M ") can be " 2 " (M=2).If the numerical value (such as N=4, i=0, and M=2) of this variable is applied to formula 3, then
(i) (it is directed to a=0), m (0)=1 and n (0)=0, (ii) is directed to (a=1), and m (1)=1 and n (1)=1, (iii) (is directed to a=
2), m (2)=0 and n (2)=2, and (iv) is directed to (a=3), m (3)=1 and n (3)=3.Therefore, ECCE#0 can be
{ EPRB#0 EREG#0, EPRB#1 EREG#1, EPRB#0 EREG#2, EPRB#1 EREG#3 }.In other words, such as Figure 13 a
Shown, EREG#0 can be selected from EPRB#0, and EREG#1 can be selected from EPRB#1.Hereafter, EREG#2 can be selected from EPRB#0,
And EREG#3 can be selected from EPRB#1.ECCE#0 can be configured using selected EREG.
Figure 13 b show the ECCE configurations according to formula 4 above.Reference picture 13b, set up the EPRB of EPDCCH groups quantity
(" M ") can be " 8 " (M=8).If the numerical value (such as N=4, i=0, and M=8) of this variable is applied to formula 4, then
(i) (it is directed to a=0), m (0)=1 and n (0)=0, (ii) is directed to (a=1), and m (1)=2 and n (1)=1, (iii) (is directed to a=
2), m (2)=4 and n (2)=2, and (iv) is directed to (a=3), m (3)=6 and n (3)=3.Therefore, ECCE#0 can be
{ EPRB#0 EREG#0, EPRB#2 EREG#1, EPRB#4 EREG#2, EPRB#6 EREG#3 }.In other words, such as Figure 13 b
Shown, (i) EREG#0 can be selected from EPRB#0, and (ii) EREG#1 can be selected from EPRB#2, and (iii) EREG#2 can be selected from
EPRB#4, and (iv) EREG#3 can be selected from EPRB#6.ECCE#0 can be configured using selected EREG.
Embodiment 2-3
With the similar fashion with embodiment 2-2.One can be selected from each EPRB for jumping determination by EPRB
EREG come select and map sum for N number of quantity EREG.However, being different from embodiment 2-2, EPRB jumps no matter when are performed
Jump, it can be added by selection according to " N " numerical valueEREG index alternatives add " 1 " EREG indexes come
Perform EREG selections/mapping program.In other words, include the EPRB of M quantity in distributed EPDCCH groups (such as EPRB#0 is arrived
EPRB# (M-1)) in the case of, program can be jumped by EPRB in the EPRB of M quantity and be used for map and (determine)
The EPRB of EREG selections (i.e. the EPRB that EREG is selected from).Here, EPRB jumps program may begin at EPRB#0 EREG#0, and
And with the jump size of the condition according to example 1 above.The EREG for being used for ECCE configuration can be each by selecting
The EPRB of a mapping EREG is (i.e. by selecting one in each in the EPRB that maps from program is jumped by EPRB
EREG) determine.
In this case, according to example 2 above -2, EPRB jumps no matter when are performed, selected from " corresponding
EPRB " (each EPRB for program determination of being jumped by EPRB) EREG indexes can increase " 1 ".However, according to reality
A 2-3 is applied, no matter when performs EPRB jumps, the EREG indexes selected from corresponding EPRB be able to can increase (to be determined by N numerical value
)Here,It is properly termed as " EREG jumps size ".For example, distributed in the configuration for distributed EPDCCH groups
EPRB quantity (" M ") is 8 (i.e. M=8) and EPDCCH groups are configured in the standard down link with standard CP (i.e. N=4)
In the case of in subframe, EPRB jumps size can be confirmed as according to the condition of example 1 aboveMoreover,
In the case where configuring ECCE according to embodiment 2-3, for selecting EREG EREG jumps from the EPRB for setting up each ECCE
It may be sized to
Therefore, the first ECCE (i.e. ECCE#0) of EPDCCH groups corresponding to formation can include：(i) EPRB#0 EREG#
0, (ii) EPRB#2 EREG#4, (iii) EPRB#4 EREG#8, and (iv) EPRB#6 EREG#12.Similarly, formation pair
2nd ECCE (i.e. ECCE#1) of the EPDCCH groups answered can include：(i) EPRB#1 EREG#0, (ii) EPRB#3 EREG#
4, (iii) EPRB#5 EREG#8, and (iv) EPRB#7 EREG#12.In the same manner, in corresponding EPDCCH groups
The last ECCE of the first round is MthECCE (i.e. ECCE# (M-1)) can use (i) EPRB#7 EREG#0, (ii) EPRB#1's
EREG#4, (iii) EPRB#3 EREG#8 and (iv) EPRB#5 EREG#12 is configured.In this example, ECCE#7 with
ECCE# (M-1) is corresponding.
It is completed as previously described when the first round (ECCE/EREG i.e. for ECCE#0 to ECCE# (M-1) configuration maps)
When, it is in the EREG that all EPRB (such as EPRB#0 to EPRB# (M-1)) of EPDCCH groups corresponding to formation include, " have
With [" mould" operation numerical value=0] corresponding to the EREG " of EREG indexes can be used for ECCE (such as the ECCE#0 of M quantity
To ECCE# (M-1)) mapping.Here, when " mould" operation (such as in this example, " operation of mould 4 ") it is applied to each
During EREG indexes, " have and [" mould" operation numerical value=0] corresponding to EREG indexes EREG " can represent with
The EREG of EREG indexes corresponding to [modulus value=0].In this example, " M " can be " 8 ".
In the second wheel (ECCE/EREG i.e. for ECCE#M to ECCE# (2M-1) configuration maps), corresponding ECCE
Mapping can start from (M+1) in the same mannerthECCE (i.e. ECCE#M) and end at 2MthECCE (i.e. ECCE# (2M-
1)).Here, (M+1)thECCE (i.e. ECCE#M) can be mapped to (i) EPRB#0 EREG#1, (ii) EPRB#2 EREG#
5, (iii) EPRB#4 EREG#9 and (iv) EPRB#6 EREG#13.2MthECCE (i.e. ECCE# (2M-1)) can be reflected
(i) EPRB#7 EREG#1 is mapped to, (ii) EPRB#1 EREG#5, (iii) EPRB#3 EREG#9's and (iv) EPRB#5
EREG#13。
When performing in the above described manner according to N numerical valueDuring wheel, the sum that can map EPDCCH groups corresponding to being formed isThe ECCE of individual quantity.In this case, if being used for the N for configuring specific ECCE in mappingthReached before EREG
The last EPRB (i.e. maximum EPRB) included in corresponding EPDCCH groups, then can again return to first by application
EPRB (i.e. minimum EPRB) cyclic shift maps successively to perform EREG.
Can be by following according to the ECCE/EREG mapping methods of the embodiment 2-3 configuration for distributed EPDCCH groups
Formula 5 and formula 6 express.
[formula 5]
ForAnd N >=M,
ECCE#i={ EPRB#m (a) EREG#n (a) }
In formula 5, for a=0,1 ..., N-1, andAndHere, [x] represents the maximum integer no more than x..
[formula 6]
ForAnd N ＜ M,
ECCE#i={ EPRB#m (a) EREG#n (a) }
In formula 6, for a=0,1 ..., N-1,And
AndHere, [x] represents the maximum integer no more than x.
Figure 14 shows the ECCE configurations in the distributed EPDCCH groups according to embodiment 2-3.
In fig. 14, the quantity (" N ") for setting up ECCE EREG can be " 4 " (N=4), " i " corresponding with ECCE indexes
(i.e. ECCE index #i) can be " 0 " (i=0).
Figure 14 a show the ECCE configurations according to formula 5 above.Reference picture 14a, form the EPRB of EPDCCH groups quantity
(" M ") can be " 2 " (M=2).If the numerical value (such as N=4, i=0, and M=2) of this variable is applied to formula 5, then
(i) (it is directed to a=0), m (0)=1 and n (0)=0, (ii) is directed to (a=1), and m (1)=1 and n (1)=4, (iii) (is directed to a=
2), m (2)=0 and n (2)=8, and (iv) is directed to (a=3), m (3)=1 and n (3)=12.Therefore, ECCE#0 can be
{ EPRB#0 EREG#0, EPRB#1 EREG#4, EPRB#0 EREG#8, EPRB#1 EREG#12 }.In other words, such as Figure 14 a
Shown, EREG#0 can be selected from EPRB#0, and EREG#4 can be selected from EPRB#1.Hereafter, EREG#8 can be selected from EPRB#0,
And EREG#12 can be selected from EPRB#1.ECCE#0 can be configured using selected EREG.
Figure 14 b show the ECCE configurations according to formula 6 above.Reference picture 14b, form the EPRB of EPDCCH groups quantity
(" M ") can be " 8 " (M=8).If the numerical value (such as N=4, i=0, and M=8) of this variable is applied to formula 6, then
(i) (it is directed to a=0), m (0)=0 and n (0)=0, (ii) is directed to (a=1), and m (1)=2 and n (1)=4, (iii) (is directed to a=
2), m (2)=4 and n (2)=8, and (iv) is directed to (a=3), m (3)=6 and n (3)=12.Therefore, ECCE#0 can be
{ EPRB#0 EREG#0, EPRB#2 EREG#4, EPRB#4 EREG#6, EPRB#6 EREG#12 }.In other words, such as Figure 14 b
Shown, (i) EREG#0 can be selected from EPRB#0, and (ii) EREG#4 can be selected from EPRB#2, and (iii) EREG#8 can be selected from
EPRB#4, and (iv) EREG#12 can be selected from EPRB#6.ECCE#0 can be configured using selected EREG.
As described above, in the resource unit (RE) for setting up EREG, size and reference due to old PDCCH control areas
The presence of signal (such as CRS etc.) and there may be is not useable for the RE of EPDCCH transmission.It can be used for each accordingly, it is possible to exist
The imbalance of the RE of EREG EPDCCH transmission quantity.Hereafter, configured in ECCE according to embodiment 2-2 and embodiment 2-3
In the case of, each ECCE available RE quantity will be described in more detail.
If the size of old PDCCH control areas is " 2 " individual OFDM symbol, in this case, RE quantity can be used
It can be described as such as following table 3.
In this case, can be by the way that EREG indexes (be selected in corresponding EPRB according to embodiment 2-2, ECCE
The EREG selected index) " 1 " is added to configure.Following table 4 can represent situation about being configured in ECCE according to embodiment 2-2
Each ECCE available RE quantity down.
[table 4]
| Set up ECCE EREG indexes | 1Tx CRS | 2Tx CRS | 4Tx CRS |
| EREG#0~EREG#3 | 25REs | 23REs | 22REs |
| EREG#4~EREG#7 | 28REs | 27REs | 25REs |
| EREG#8~EREG#11 | 30REs | 28REs | 28REs |
| EREG#12~EREG#15 | 31REs | 30REs | 29REs |
With reference to table 4, in the case of a transmission antenna port (" 1Tx CRS "), it is made up of EREG#0 to EREG#3
ECCE can include 25 available RE, and the ECCE being made up of EREG#12 to EREG#15 can include 31 available RE.Cause
This, the available RE differences between two ECCE can be " 6 ".
Similarly, in the case where the size of old PDCCH control areas is " 2 " individual OFDM symbol, table 5 below can be with table
Show the quantity of the available RE according to the embodiment 2-3 ECCE configured.
[table 5]
| Set up ECCE EREG indexes | 1Tx CRS | 2Tx CRS | 4Tx CRS |
| EREG#0, EREG#4, EREG#8, EREG#12 | 28REs | 27REs | 26REs |
| EREG#1, EREG#5, EREG#9, EREG#13 | 29REs | 27REs | 26REs |
| EREG#2, EREG#6, EREG#10, EREG#14 | 28REs | 27REs | 26REs |
| EREG#3, EREG#7, EREG#11, EREG#15 | 29REs | 27REs | 26REs |
Reference picture 5, in the case of a transmission antenna port (" 1Tx CRS "), by EREG#0, EREG#4, EREG#8
And the ECCE of EREG#12 compositions can include 28 available RE.It is made up of EREG#1, EREG#5, EREG#9 and EREG#13
ECCE can include 29 available RE.Therefore, the available RE differences between two ECCE can be " 1 ".In embodiment 2-3 feelings
This available RE poor (such as 1) under condition can be less than the available RE poor (such as 6) in the case of embodiment 2-2.Moreover,
In the case of two transmission antenna ports (" 2Tx CRS ") and four transmission antenna ports (" 4TxCRS "), according to embodiment 2-3
Available RE differences between the ECCE of configuration can be " 0 ".
In example 2, the embodiment combined with embodiment 1 is described.However, the present embodiment not limited to this.Moreover, implement
Embodiment described in example 2 may be independently of embodiment 1.
For example, it can be configured according to embodiment 2-1, ECCE using the EREG with same index.By 8 EPRB groups
Into EPDCCH groups in the case of, an ECCE can be by selecting to have from EPRB#0, EPRB#2, EPRB#4 and EPRB#6
The EREG (such as EREG corresponding with EREG#0) of same index is configured.However, embodiment 2-1 can be independently of embodiment 1.
Therefore, in this case, ECCE can by from four continuous EPRB (such as EPRB#0, EPRB#1, EPRB#2 and
EPRB#3 the EREG (such as EREG corresponding with EREG#0) with same index is selected to configure in).
It will be described below the other examples associated with the embodiment 2 independently of embodiment 1.According to embodiment 2-2,
One ECCE can use EREG (such as EREG#0, EREG#1, EREG#2 and EREG#3) corresponding with continuity index to configure.
In the case of the EPDCCH groups being made up of 2 EPRB, an ECCE can use the EREG#0 of (i) selected from EPRB#0, (ii)
EREG#1 selected from EPRB#1, (iii) are selected from EPRB#0 EREG#2, and the EREG#3 of (iv) selected from EPRB#1 to configure.
However, embodiment 2-2 can be independently of embodiment 1.In this case, an ECCE can be selected by (i) from EPRB#0
EREG#0 and (ii) select EREG#1 from EPRB#1, and EREG#2, EREG#3 are configured.
Similarly, embodiment 2-3 can be independently of embodiment 1.More specifically, ECCE can be by jumping in no EPRB
In the case of select in turn increaseEREG indexes configure.For example, in the situation for the EPDCCH groups being made up of 2 EPRB
Under, an ECCE can select EREG#0 by (i) from EPRB#0, EREG#4, EREG#8 and (ii) selects from EPRB#1
EREG#12 is configured.
As described above, embodiment 1 and embodiment 2, which can be provided in distributed EPDCCH groups, performs ECCE/EREG mappings
Method.In embodiment 2-1, ECCE/EREG mapping functions can be limited by formula 1 and formula 2.In embodiment 2-2,
ECCE/EREG mapping functions can be limited by formula 3 and formula 4.In embodiment 2-3, ECCE/EREG mapping functions can be with
Limited by formula 5 and formula 6.However, formula 1 to formula 6 represents the exemplary functions formula limited according to each embodiment,
And the formula of other forms can be expressed as based on embodiment 2-1, embodiment 2-2 and embodiment 2-3.
Figure 15 is to show the method for being used to transmit control information in transmission/receiving point according at least one embodiment
(1500) flow chart.
Reference picture 15, transmission/receiving point can by two or more in subframe Physical Resource Block (PRB) to
Data area is to user device transmissions control information.At step S1510, transmission/receiving point can configure (or formation) and increase
Strong control channel unit (ECCE) (or can further referred to as " distribution ECCE ").Here, in two or more PRB pair
Each in resource unit (RE) can according to first frequency scheme (i.e. frequency and then time mode first) by repeat make
With 16 numerals, (such as 0,1,2 ... ... 15) indexs.Resource unit (RE) with same index can be included in together
In the resource unit group (EREG) of one enhancing.Each ECCE can include EREG corresponding with the EREG indexes with same modulus value
(such as 4 or 8 EREG).More specifically, each in the ECCE configured at step S1510 can use (i)
From having same remainder (such as 0,1,2, or 4 corresponding to different EREG indexes 3) when different EREG indexes divided by 4
EREG, either (ii) is from having the different EREG indexes pair of same remainder (such as 0 or 1) when different EREG indexes divided by 2
8 EREG answered, to configure.
At step S1510, forming ECCE EREG can be located in two or more PRB pair.
The description of reference picture 4 is distributed to the example of the index of PRB pair.Reference picture 4 and Fig. 7, can be according to first frequency scheme (i.e.
Frequency and then time mode first) by EREG from 0 numbering (indexing) to 15.Figure 4 illustrates embodiment in, can be with
Index is performed using based on the cyclic shift of symbol.More specifically, as shown in figure 4, being pointed out in the first symbol by " 400 "
Resource unit (RE) be indexed as after 11 (indexing 11), the adjacent R E pointed out in the second symbol by " 410 " is connect
Index continuously as 12 (indexing 12).Meanwhile in the embodiment of the invention shown in figure 7, the circulation of symbol can be not based on
Perform and index in the case of displacement.Therefore, in this case, as shown in fig. 7, being pointed out by " 700 " in the first symbol
Resource unit (RE) is indexed as after 11 (indexing 11), is continued index by the RE that " 710 " are pointed out in the second symbol
For 12 (indexing 12).Here, index for 12 RE (" 710 ") not with index it is adjacent for 11 RE (" 700 ").
Transmission/receiving point can use (i) from have when different EREG indexes divided by 4 same remainder (such as 0,1,2,
Either EREG corresponding to different EREG indexes 3) or (ii) have same remainder (example from when different EREG indexes divided by 2
The EREG as corresponding to 0 or different EREG indexes 1), to set up ECCE.
For example, ECCE can be used from having same remainder (such as 0,1,2, or 3) when different EREG indexes divided by 4
Different EREG indexes corresponding to EREG configure.More specifically, an ECCE can include EREG#0, EREG#4, EREG#
8 and EREG#12.Another ECCE can include EREG#1, EREG#5, EREG#9 and EREG#13.Another ECCE can be with
Including EREG#2, EREG#6, EREG#10 and EREG#14.Other ECCE can include EREG#3, EREG#7, EREG#11 with
And EREG#15.Moreover, EREG indexes group corresponding with each ECCE can be expressed as { 0,4,8,12 }, { 1,5,9,13 },
{ 2,6,10,14 }, or { 3,7,11,15 }.
In other embodiments, have when ECCE uses are from when different EREG indexes divided by 2 same remainder (such as 0 or
Person 1) different EREG indexes corresponding to EREG come in the case of configuring, an ECCE can include EREG#0, EREG#2,
EREG#4, EREG#6, EREG#8, EREG#10, EREG#12 and EREG#14.Another ECCE can include EREG#1,
EREG#3, EREG#5, EREG#7, EREG#9, EREG#11 and EREG#13.Moreover, EREG indexes corresponding with each ECCE
Group can be expressed as { 0,2,4,6,8,10,12,14 } or { 1,3,5,7,9,11,13,15 }.
Setting up ECCE EREG can be located in two or more PRB pair.That is EPDCCH can be according to distributed class
Type transmits.More specifically, in transmission/receiving point, the EPDCCH of distributed-type can be formed by distributing ECCE PRB pair
Group (i.e. distributed EPDCCH groups).
Transmission/receiving point can configure (or distribution) ECCE by being distributed EREG to PRB pair so that frequency diversity increases
Benefit is maximum.This ECCE collocation methods can embody and not limited to this according to embodiment 1.
Return to Figure 11, transmission/receiving point can by 8 PRB pairs from EPRB#0 jump every two PRB pairs when
Wait and EREG is selected in each in EPRB#2, EPRB#4 and EPRB#6 and configures ECCE.Transmission/receiving point can use
The EREG of " PRB pair determined by jump program " (such as EPRB#0, EPRB#2, EPRB#4 and EPRB#6) come configure (or
Distribution) ECCE.More specifically, as described above, transmission/receiving point can use (i) to have from when different EREG indexes divided by 4
There is an EREG corresponding to the different EREG indexes of same remainder, or (ii) same remaining from having when different EREG indexes divided by 2
EREG corresponding to several different EREG indexes, to configure an ECCE.
In more detail, EREG#0 can be selected from EPRB#0, and EREG#4 can be selected from EPRB#2, and EREG#8 can be selected from
EPRB#4, and EREG#12 can be selected from EPRB#16.Selected EREG can set up ECCE.In other embodiments, ECCE
Can be by selecting the EREG#12 of (i) from EPRB#0, the EREG#8 of (ii) from EPRB#2, (iii) is from EPRB#4's
EREG#4, and the EREG#0 of (iv) from EPRB#6, to configure.
In the case where EREG indexes are constrained to [0,1,2 ... ..., 15], (i) from when different EREG indexes divided by 4
EREG combination corresponding to different EREG indexes with same remainder, or (ii) have from when different EREG indexes divided by 2
There is the combination of EREG corresponding to the different EREG indexes of same remainder, may be restrained.In view of this combination, ECCE is distributed to
EREG indexes (being properly termed as " EREG indexes group ") can be { 0,4,8,12 }, { 1,5,9,13 }, { 2,6,10,14 }, or
{ 3,7,11,15 } one in.Alternatively, the EREG indexes group for distributing to ECCE can be { 0,2,4,6,8,10,12,14 }
Or one in { 1,3,5,7,9,11,13,15 }.
Return to Figure 15, at step S1520, transmission/receiving point can by the ECCE that configures it is at least one to
Family equipment transmission control information.
Here it is possible to control information is transmitted by the corresponding EPDCCH of control channel with being limited in data area 220.
EPDCCH can be assigned at least one ECCE in PRB pair.
Figure 16 is to show the flow chart for being used to receive the method for control information in a user device according to other embodiments.
Reference picture 16, user equipment can by the data area of two or more in subframe PRB pair from transmission/
Receiving point receives control information.
At step S1610, user equipment can be received wireless signal by least one ECCE and (is properly termed as " wireless
Electric signal ").Here, the resource unit (RE) in each in two or more PRB pair can be according to first frequency scheme
(i.e. frequency and then time mode first) is indexed by reusing 16 numerals (for example, 0,1,2 ... ..., 15).Tool
The resource unit (RE) for having same index can be included in same EREG.Each at least one ECCE can include
EREG corresponding with the EREG indexes with same modulus value.More specifically, each at least one ECCE can use
(i) from having same remainder (such as 0,1,2, or 4 corresponding to different EREG indexes 3) when different EREG indexes divided by 4
Individual EREG, either (ii) is from having the different EREG indexes of same remainder (such as 0 or 1) when different EREG indexes divided by 2
Corresponding 8 EREG, to configure.Moreover, at step S1620, user equipment can obtain from the wireless signal received
Control information.
In step S1610, forming ECCE EREG can be located in two or more PRB pair.
Reference picture 4 is distributed to the example of the index of PRB pair, reference picture 4 and Fig. 7 to Fig. 9 descriptions, can be according to first frequency side
EREG is numbered (indexing) to 15 by case (i.e. frequency and then time mode first) from 0.Figure 4 illustrates embodiment
In, it can use based on the cyclic shift of symbol to perform index.More specifically, as shown in figure 4, in the first symbol by
The resource unit (RE) that " 400 " are pointed out is indexed the money after 11 (indexing 11), to be pointed out in the second symbol by " 410 "
Source unit (RE) is successively indexed as 12 (indexing 12).Meanwhile in the embodiment of the invention shown in figure 7, can not have
Perform and index in the case of cyclic shift based on symbol.Therefore, in this case, as shown in fig. 7, in the first symbol
The resource unit (RE) pointed out by " 700 " is indexed after 11 (indexing 11), to be pointed out in the second symbol by " 710 "
RE is successively indexed as 12 (indexing 12).Here, index for 12 RE (" 710 ") not with index for 11 RE
(" 700 ") are adjacent.
ECCE can use (i) from having same remainder (such as 0,1,2, or 3) when different EREG indexes divided by 4
EREG corresponding to different EREG indexes, either (ii) from have when different EREG indexes divided by 2 same remainder (such as 0 or
1) EREG corresponding to different EREG indexes is configured.In other words, this EREG can be configured for ECCE to distribute.
For example, ECCE can be used from having same remainder (such as 0,1,2, or 3) when different EREG indexes divided by 4
Different EREG indexes corresponding to EREG configure.More specifically, an ECCE can include EREG#0, EREG#4, EREG#
8 and EREG#12.Another ECCE can include EREG#1, EREG#5, EREG#9 and EREG#13.Another ECCE can be with
Including EREG#2, EREG#6, EREG#10 and EREG#14.Other ECCE can include EREG#3, EREG#7, EREG#11 with
And EREG#15.Moreover, EREG indexes group corresponding with each ECCE can be expressed as { 0,4,8,12 }, { 1,5,9,13 },
{ 2,6,10,14 }, or { 3,7,11,15 }.
In other embodiments, have when ECCE uses are from when different EREG indexes divided by 2 same remainder (such as 0 or
Person 1) different EREG indexes correspond to EREG come in the case of configuring, an ECCE can include EREG#0, EREG#2, EREG#
4th, EREG#6, EREG#8, EREG#10, EREG#12 and EREG#14.Another ECCE can include EREG#1, EREG#3,
EREG#5, EREG#7, EREG#9, EREG#11 and EREG#13.Moreover, EREG indexes group corresponding with each ECCE can be by
It is expressed as { 0,2,4,6,8,10,12,14 } or { 1,3,5,7,9,11,13,15 }.
Setting up ECCE EREG can be located in two or more PRB pair.That is EPDCCH can be according to distributed class
Type transmits.More specifically, it is (i.e. distributed that the EPDCCH groups that ECCE PRB pair can set up distributed-type are distributed
EPDCCH groups).
EREG is assigned to PRB pair in which can be distributed causes frequency diversity gain to be in relative maximum.This ECCE
Distribution method can embody and not limited to this according to embodiment 1.
Return to Figure 11, ECCE can be used selected from when being jumped from the EPRB#0 in 8 PRB pairs every two PRB
The EREG of each in EPRB#2, EPRB#4 and EPRB#6 is configured.ECCE can be used " to be determined by jump program
The EREG of PRB pair " (such as EPRB#0, EPRB#2, EPRB#4 and EPRB#6) is configured.More specifically, as described above,
ECCE can use (i) to have EREG corresponding to the different EREG indexes of same remainder from when different EREG indexes divided by 4, or
Person (ii) has EREG corresponding to the different EREG indexes of same remainder from when different EREG indexes divided by 2, to configure one
ECCE。
In more detail, EREG#0 can be selected from EPRB#0, and EREG#4 can be selected from EPRB#2, and EREG#8 can be selected from
EPRB#4, and EREG#12 can be selected from EPRB#16.Selected EREG can set up ECCE.In other embodiments, ECCE
Can be by selecting the EREG#12 of (i) from EPRB#0, the EREG#8 of (ii) from EPRB#2, (iii) is from EPRB#4's
EREG#4, and the EREG#0 of (iv) from EPRB#6, to configure.
In the case where EREG indexes are constrained to [0,1,2 ... ..., 15], (i) from when different EREG indexes divided by 4
EREG combination corresponding to different EREG indexes with same remainder, or (ii) have from when different EREG indexes divided by 2
The combination for having EREG corresponding to the different EREG indexes of same remainder can be with restrained.In view of this combination, ECCE is distributed to
EREG indexes (being properly termed as " EREG indexes group ") can be { 0,4,8,12 }, { 1,5,9,13 }, { 2,6,10,14 }, or
{ 3,7,11,15 } one in.Alternatively, the EREG indexes group for distributing to ECCE can be { 0,2,4,6,8,10,12,14 }
Or one in { 1,3,5,7,9,11,13,15 }.
Figure 16 is returned to, at step S1620, then transmission/receiving point can obtain control information.
Figure 17 is the schematic diagram for showing transmission/receiving point according to some embodiments.
Reference picture 17, according to the present embodiment, transmission/receiving point 1700 can pass through two or more in subframe
The data area of PRB pair is to user device transmissions control information.According to the present embodiment, transmission/receiving point 1700 can include control
Processor 1710, emitter 1720 and receiver 1730 processed.
Control processor 1710 can configure (either formed) ECCE (or herein referred as " distribution ECCE ").It is more specific and
Speech, can according to first frequency scheme (i.e. frequency and then time mode first) by 16 numerals of reuse (for example, 0,1,
2 ..., 15) index the resource unit (RE) in each in two or more PRB pair.Money with same index
Source unit (RE) can be included in identical enhancing resource unit group (EREG).Each ECCE can include with identical modulus value
EREG index corresponding EREG (such as 4 or 8 EREG).In detail, control processor 1710 can use (i) when
Different EREG index divided by when 4 with same remainder (for example, 0,1,2, or different EREG 3) index corresponding to 4
Individual EREG, either (ii) is when different EREG index divided by are compiled from the different EREG with same remainder (for example, 0 or 1) when 2
8 EREG corresponding to index, to configure each ECCE.
Control processor 1710 can control " ECCE configurations " (or being properly termed as " ECCE distribution ") so that set up ECCE
EREG be located in one or more PRB pair.EPDCCH can be transmitted according to distributed-type.More specifically, exist
In transmission/receiving point 1700, EPDCCH groups (the i.e. distributed EPDCCH that ECCE PRB pair can form distributed-type is distributed
Group).
Indexed in EREG in the case of being constrained in [0,1,2 ..., 15], (i) when different EREG index divided by when 4 with
Different EREG with same remainder index corresponding to EREG combination, or (ii) index divided by when 2 as different EREG
EREGs different from what it is with same remainder index corresponding to EREG combination can be with restrained.In view of this combination, distribution
EREG to ECCE, which indexs and (is properly termed as " EREG index group "), to be { 0,4,8,12 }, { 1,5,9,13 }, 2,6,
10,14 } one and in { 3,7,11,15 }.Alternatively, distribute to ECCE EREG index group can be 0,2,4,
6,8,10,12,14 } one and in { 1,3,5,7,9,11,13,15 }.
In addition, control processor 1710 can according to for perform EPDCCH transmission ECCE/EREG map method and/
Or carry out the operation of controlling transmission/receiving point 1700 for performing the method that the ECCE in specific distribution formula EPDCCH groups indexs.
Emitter 1720 can be by least one to user device transmissions control information in the ECCE that configures.
Emitter 1720 and receiver 1730 can respectively be transmitted with reference to user equipment and received for performing above-mentioned
Signal, message and/or data required for embodiment.
Figure 18 is the schematic diagram for showing the user equipment according to some embodiments.
Reference picture 18, according to the present embodiment, user equipment 1800 can pass through two or more in subframe PRB pair
Data area from transmission/receiving point (i.e. transmission/receiving point 1700) receive control information.According to the present embodiment, user equipment
1800 can include receiver 1810, control processor 1820 and emitter 1830.
Receiver 1830 can receive the wireless signal with least one ECCE.Here it is possible to according to first frequency scheme (i.e.
Frequency and then time mode first) by reusing 16 numerals (for example, 0,1,2 ..., 15) index two or more
Resource unit (RE) in each in multiple PRB pairs.Resource unit (RE) with same index can be included in phase
Same EREG.Each at least one ECCE can include indexing corresponding EREG with the EREG with identical modulus value.More
Specifically, each at least one ECCE can use (i) when different EREG index divided by when 4 with having phase congruence
Number (for example, 0,1,2, either different EREG 3) index corresponding to 4 EREG or (ii) removed when different EREG index
With corresponding 8 EREG that indexed when 2 from the different EREG with same remainder (for example, 0 or 1), to configure.
Setting up ECCE EREG can be located in two or more PRB pair.It can be passed according to distributed-type
Defeated EPDCCH.More specifically, in transmission/receiving point, the EPDCCH of distributed-type can be set up by distributing ECCE PRB pair
Group (i.e. distributed EPDCCH groups).
Indexed in EREG in the case of being constrained in [0,1,2 ..., 15], (i) when different EREG index divided by when 4 with
Different EREG with same remainder index corresponding to EREG combination, or (ii) index divided by when 2 as different EREG
EREGs different from what it is with same remainder index corresponding to EREG combination can be with restrained.In view of this combination, distribution
EREG to ECCE index (i.e. " EREG index group ") can be { 0,4,8,12 }, { 1,5,9,13 }, { 2,6,10,14 } with
And one in { 3,7,11,15 }.Alternatively, distribute to ECCE EREG index group can be 0,2,4,6,8,10,
12,14 } one and in { 1,3,5,7,9,11,13,15 }.
Control processor 1820 can obtain control information from the wireless signal received.Further, control process
Device 1820 can control the operation (i.e. the operation of user equipment 1800) for performing above-mentioned the present embodiment and needing.It is more specific and
Speech, what control processor 1820 can be in specific distribution formula EPDCCH groups indexs for EPDCCH receptions and/or ECCE
ECCE/EREG map and control the operation of user equipment 1800.
Receiver 1810 and emitter 1830 can respectively be transmitted with reference to transmission/receiving point and received above-mentioned for performing
Signal, message and/or data required for the present embodiment.
Although eliminating the content for the technical standard being related in above-described embodiment for the brief description of this specification,
It is that the relevant content of technical standard may be constructed the part of this specification.Therefore, the content relevant with standard is increased to explanation
It is to be interpreted as being included within the scope of the present invention in book and/or claim.
More specifically, document set forth below can form a part for this explanation as a part for open source literature.Cause
This, the increase content relevant with standard and/or normative document are to be interpreted as being included in this into specification and/or claim
In the scope of invention.
As noted previously, as the technological thought of the present invention is described by exemplary embodiment, it is possible to is not departing from this
In the case of the essential characteristic of invention according to foregoing description by those skilled in the art make it is various forms of replace, modification and
Change.Therefore, the embodiment disclosed in the present invention is intended to show that the technological thought of the present invention, and the scope of the present invention is unrestricted
In embodiment.The scope of the present invention should belong to this hair to be equal to all technological thoughts included within the scope of claim
Bright this mode explains on the basis of appended claims.
The cross reference of related application
The application requires and (submitted within 18th in September in 2012) korean patent application No.10- according to 35U.S.C. § 119
2012-0103584 and (being submitted on December 13rd, 2012) korean patent application No.10-2012-0145368, by drawing
Entire contents are incorporated herein with mode.
Claims (20)
1. it is a kind of be used in transmission/receiving point by two or more Physical Resource Block (PRB) in subframe to number
Method according to from region to user device transmissions control information, methods described include：
The control channel unit (ECCE) of enhancing is formed, wherein, the money in each in (i) two or more PRB pair
Source unit (RE) is indexed according to first frequency scheme by reusing 16 numerals, and (ii) has the resource unit of same index
(RE) it is included in the resource unit group (EREG) of same enhancing, each in (iii) ECCE includes and following difference
4 or 8 EREG corresponding to EREG indexes, the different EREG indexes have same remaining when as one in itself divided by 4 and 2
Number, and each EREG included in (iv) ECCE is located in two or more PRB pair；And
By at least one to user device transmissions control information in ECCE,
Wherein described formation ECCE includes：
When the quantity for forming the EREG of each in ECCE is less than the quantity of PRB pair, formation ECCE causes every in ECCE
One is mapped to the EREG included by the jump with constant index interval and at least two PRB pairs that select.
2. the method according to claim 11, wherein,
Constant index quantity of the interval based on EREG and the quantity of PRB pair determine.
3. according to the method for claim 1, wherein, two or more PRB pair is included according to distributed-type
In physical downlink control channel (EPDCCH) group for the enhancing that scheme is formed.
4. according to the method for claim 1, wherein, be chosen as with each corresponding EREG indexes group in ECCE 0,
4,8,12 }, { 1,5,9,13 }, one in { 2,6,10,14 }, or { 3,7,11,15 }.
5. according to the method for claim 1, wherein, be chosen as with each corresponding EREG indexes group in ECCE 0,
2,4,6,8,10,12,14 } one or in { 1,3,5,7,9,11,13,15 }.
6. it is a kind of be used in a user device by two or more Physical Resource Block (PRB) in subframe to data field
The method that domain receives control information from transmission/receiving point, methods described include：
Wireless signal is received by the control channel unit (ECCE) of at least one enhancing, wherein, (i) two or more
Resource unit (RE) in each in PRB pair is indexed according to first frequency scheme by reusing 16 numerals, (ii)
Resource unit (RE) with same index is included in the resource unit group (EREG) of same enhancing, in (iii) ECCE
Each include from following different EREG indexes corresponding to 4 or 8 EREG, the different EREG indexes when itself divided by 4 and 2
In one when there is same remainder, and each EREG included in (iv) ECCE is located at two or more
In PRB pair；And
Control information is obtained from the wireless signal received
Wherein
It is associated with the reception of wireless signal when the quantity for forming the EREG of each in ECCE is less than the quantity of PRB pair
ECCE in each be mapped to what is included by the jump with constant index interval and at least two PRB pairs that select
EREG。
7. the method according to claim 11, wherein,
Constant index quantity of the interval based on EREG and the quantity of PRB pair determine.
8. according to the method for claim 6, wherein, two or more PRB pair is included according to distributed-type
In physical downlink control channel (EPDCCH) group for the enhancing that scheme is formed.
9. according to the method for claim 6, wherein, be chosen as with each corresponding EREG indexes group in ECCE 0,
4,8,12 }, { 1,5,9,13 }, one in { 2,6,10,14 }, or { 3,7,11,15 }.
10. according to the method for claim 6, wherein, be chosen as with each corresponding EREG indexes group in ECCE 0,
2,4,6,8,10,12,14 } one or in { 1,3,5,7,9,11,13,15 }.
11. it is a kind of be used for by two or more Physical Resource Block (PRB) in subframe to data area set to user
Transmission/receiving point of standby transmission control information, the transmission/receiving point include：
Control processor, the control channel unit (ECCE) of enhancing is configured to form, wherein, (i) two or more PRB
Resource unit (RE) in each of centering is indexed according to first frequency scheme by reusing 16 numerals, and (ii) has
The resource unit (RE) of same index is included in the resource unit group (EREG) of same enhancing, each in (iii) ECCE
It is individual including from following different EREG indexes corresponding to 4 or 8 EREG, the different EREG indexes are when in itself divided by 4 and 2
There is same remainder, and each EREG included in (iv) ECCE is located at two or more PRB pair at one
In；And
Emitter, it is configured as by least one to user device transmissions control information in ECCE,
Wherein, the control processor is configured as：
When the quantity for forming the EREG of each in ECCE is less than the quantity of PRB pair, formation ECCE causes every in ECCE
One is mapped to the EREG included by the jump with constant index interval and at least two PRB pairs that select.
12. transmission/receiving point according to claim 11, wherein,
Constant index quantity of the interval based on EREG and the quantity of PRB pair determine.
13. transmission/receiving point according to claim 11, wherein, two or more PRB pair is included in basis point
In physical downlink control channel (EPDCCH) group for the enhancing that cloth type scheme is formed.
14. transmission/receiving point according to claim 11, wherein, with each corresponding EREG indexes group in ECCE
{ 0,4,8,12 } is chosen as, { 1,5,9,13 }, one in { 2,6,10,14 }, or { 3,7,11,15 }.
15. transmission/receiving point according to claim 11, wherein, with each corresponding EREG indexes group in ECCE
One be chosen as in { 0,2,4,6,8,10,12,14 } or { 1,3,5,7,9,11,13,15 }.
16. a kind of two or more Physical Resource Block (PRB) for being used to pass through in subframe to data area from transmitting/connect
Sink receives the user equipment of control information, and the user equipment includes：
Receiver, it is configured as receiving wireless signal by the control channel unit (ECCE) of at least one enhancing, wherein,
(i) resource unit (RE) in each in two or more PRB pair passes through reuse 16 according to first frequency scheme
Numeral is indexed, and (ii) has the resource unit group (EREG) that resource unit (RE) of same index is included in same enhancing
In, in (iii) ECCE each include from following different EREG indexes corresponding to 4 or 8 EREG, the different EREG ropes
Draw has same remainder when as one in itself divided by 4 and 2, and each EREG included in (iv) ECCE is located at
In two or more PRB pair；And
Control processor, it is configured as obtaining control information from the wireless signal received,
It is associated with the reception of wireless signal when the quantity for forming the EREG of each in ECCE is less than the quantity of PRB pair
ECCE in each be mapped to what is included by the jump with constant index interval and at least two PRB pairs that select
EREG。
17. user equipment according to claim 16, wherein,
Constant index quantity of the interval based on EREG and the quantity of PRB pair determine.
18. user equipment according to claim 16, wherein, two or more PRB pair is included according to distribution
In physical downlink control channel (EPDCCH) group for the enhancing that formula type scheme is formed.
19. user equipment according to claim 16, wherein, it is chosen with each corresponding EREG indexes group in ECCE
For { 0,4,8,12 }, { 1,5,9,13 }, one in { 2,6,10,14 }, or { 3,7,11,15 }.
20. user equipment according to claim 16, wherein, it is chosen with each corresponding EREG indexes group in ECCE
For one in { 0,2,4,6,8,10,12,14 } or { 1,3,5,7,9,11,13,15 }.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20120103584 | 2012-09-18 | ||
| KR10-2012-0103584 | 2012-09-18 | ||
| KR10-2012-0145368 | 2012-12-13 | ||
| KR1020120145368A KR101562694B1 (en) | 2012-09-18 | 2012-12-13 | Method for transmitting control information, transmission/reception point thereof, method for receiving control information and terminal thereof |
| PCT/KR2013/008329 WO2014046425A2 (en) | 2012-09-18 | 2013-09-16 | Transmission and reception of control information |
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| CN104718715A CN104718715A (en) | 2015-06-17 |
| CN104718715B true CN104718715B (en) | 2018-01-16 |
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| CN201380053919.0A Active CN104718715B (en) | 2012-09-18 | 2013-09-16 | The transmission and reception of control information |
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| JP (1) | JP6027247B2 (en) |
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| US10560235B2 (en) * | 2014-10-31 | 2020-02-11 | Qualcomm Incorporated | Narrowband control channel decoding |
| WO2017028071A1 (en) * | 2015-08-14 | 2017-02-23 | 华为技术有限公司 | Downlink control information receiving and sending methods and devices |
| CN107888358A (en) * | 2016-09-30 | 2018-04-06 | 华为技术有限公司 | Transmit method, user equipment and the network equipment of control information |
| US20200187238A1 (en) * | 2017-08-03 | 2020-06-11 | Nec Corporation | Methods and apparatuses for control resource mapping |
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| JP6027247B2 (en) | 2016-11-16 |
| KR101562694B1 (en) | 2015-10-22 |
| CN104718715A (en) | 2015-06-17 |
| JP2015534750A (en) | 2015-12-03 |
| KR101617586B1 (en) | 2016-05-03 |
| KR20140036927A (en) | 2014-03-26 |
| KR20150080469A (en) | 2015-07-09 |
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