CN104782069A - Transmission and reception of control information - Google Patents

Transmission and reception of control information Download PDF

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Publication number
CN104782069A
CN104782069A CN201380059610.2A CN201380059610A CN104782069A CN 104782069 A CN104782069 A CN 104782069A CN 201380059610 A CN201380059610 A CN 201380059610A CN 104782069 A CN104782069 A CN 104782069A
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ereg
ecce
prb
index
group
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CN201380059610.2A
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CN104782069B (en
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朴奎镇
崔宇辰
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Google LLC
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KT Corp
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Priority claimed from PCT/KR2013/008191 external-priority patent/WO2014042411A1/en
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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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

Abstract

The disclosure is related to transmitting control information in a transmission /reception point and to receiving the control information in user equipment. Particularly, the present disclosure relates to transmitting the control information for user equipment which receives downlink control information through a downlink control channel newly defined in a data region. Furthermore, the present disclosure relates to performing a resource mapping for enhanced control channel elements (ECCEs) of an enhanced physical downlink control channel (EPDCCH).

Description

The transmission of control information and reception
Technical field
The disclosure relates at transmission/reception point place's control information transmission and relates at subscriber equipment place receiving control information.Especially, the disclosure relates to the method and apparatus (such as transmission/reception point) of the control information for transmission user equipment, and this subscriber equipment is by the downlink control channel receiving downlink control information of up-to-date employing in data area (or restriction).And the disclosure relates to the method and apparatus (such as subscriber equipment) for receiving control information.
Background technology
Wireless communication system is designed to: to many user's transferring large number of data.But, the capacity increasing wireless communication system is difficult to due to the limited resources of control area.In order to overcome this restriction, may need to use downlink control channel with communicating downlink control information in the data area.
Meanwhile, typical control channel unit (CCE) is associated with the distribution of the downlink control channel in control area.Recently, the control channel unit (ECCE) of enhancing by latest definition for allocation of downlink control channel in the data area.Therefore, may need to develop the Resource Allocation Formula be associated with the ECCE of latest definition.
Summary of the invention
Technical problem
The present embodiment is resource unit group (EREG) mapping method of control channel unit (the ECCE)/enhancing providing a kind of enhancing for the downlink control channel transmission in data area.And the present embodiment is to provide a kind of for performing the method and apparatus of ECCE index in centralized " physical downlink control channel (EPDCCH) of enhancing " group.
According at least one embodiment, can provide a kind of in transmission/reception point by the method for the right data area of the Physical Resource Block (PRB) in subframe to user device transmissions control information.Described method can comprise: form the control channel unit (ECCE) strengthened, wherein, i the Resource Unit (RE) of () PRB centering is indexed by reusing 16 numerals according to first scheme frequently, (ii) Resource Unit (RE) with same index is included in the resource unit group (EREG) of same enhancing, and each (iii) in ECCE comprise with when EREG index is divided by EREG corresponding to EREG index during N with same remainder, wherein, N is in 4 and 2; And by least one in ECCE to user device transmissions control information.
According to another embodiment, can provide a kind of in a user device by the method for the right data area of the Physical Resource Block (PRB) in subframe from transmission/reception point receiving control information.The method can comprise: the control channel unit (ECCE) strengthened by least one receives wireless signal, wherein, i the Resource Unit (RE) of () PRB centering is indexed by reusing 16 numerals according to first scheme frequently, (ii) Resource Unit (RE) with same index can be included in the resource unit group (EREG) of same enhancing, and each (iii) in ECCE can comprise and have when EREG index is divided by EREG corresponding to the EREG index of same remainder during N, wherein, N is in 4 and 2; And from the wireless signal received, obtain control information.
According to another embodiment, can provide a kind of for by the transmission/reception point of the right data area of the Physical Resource Block (PRB) in subframe to user device transmissions control information.This transmission/reception point can comprise control processor and transmitter.This control processor can be configured to form the control channel unit (ECCE) strengthened.In this article, i the Resource Unit (RE) of () PRB centering is indexed by reusing 16 numerals according to first scheme frequently, (ii) Resource Unit (RE) with same index is included in the resource unit group (EREG) of same enhancing, and each (iii) in ECCE comprise with when EREG index is divided by EREG corresponding to EREG index during N with same remainder, wherein, N is in 4 and 2.This transmitter can be configured to by least one in ECCE to user device transmissions control information.
According to another embodiment, can provide a kind of for by the subscriber equipment of the right data area of the Physical Resource Block (PRB) in subframe from transmission/reception point receiving control information.This subscriber equipment can comprise receiver and control processor.The control channel unit (ECCE) that this receiver can be configured to be strengthened by least one receives wireless signal.In this article, i the Resource Unit (RE) of () PRB centering is indexed by reusing 16 numerals according to first scheme frequently, (ii) Resource Unit (RE) with same index can be included in the resource unit group (EREG) of same enhancing, and each (iii) in ECCE can comprise with when EREG index is divided by EREG corresponding to EREG index during N with same remainder, wherein, N is in 4 and 2.Control processor can be configured to obtain control information from the wireless signal received.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the wireless communication system that at least one embodiment can be applied to is shown;
Resource Block when Fig. 2 shows standard cyclic prefix (standard C P) to (RBP), as the example of the structure of the down-chain resource in Long Term Evolution (LTE) or senior LTE (LTE-A) system;
Fig. 3 shows and to use when a transmit antenna port (CRS port 0) cyclic shift based on symbol to index program and being mapped by the Resource Unit (RE) that the Physical Resource Block (PRB) of indexing is right according to EREG;
Fig. 4 shows and to use when two transmit antenna ports (CRS port 0 and 1) cyclic shift based on symbol to index program and being mapped by the RE that the Physical Resource Block (PRB) of indexing is right according to EREG;
Fig. 5 shows and to use when four transmit antenna ports (CRS port 0,1,2 and 3) cyclic shift based on symbol to index program and being mapped by the RE that the PRB that indexs is right according to EREG;
Fig. 6 to show when a transmit antenna port (CRS port 0) and not to index program and being mapped by the RE that the PRB that indexs is right according to EREG when having cyclic shift;
Fig. 7 to show when two transmit antenna ports (CRS port 0 and 1) and not to index program and being mapped by the RE that the PRB that indexs is right according to EREG when having cyclic shift;
Fig. 8 to show when four transmit antenna ports (CRS port 0,1,2 and 3) and not to index program and being mapped by the RE that the Physical Resource Block (PRB) of indexing is right according to EREG when having cyclic shift;
Fig. 9 illustrates and to map according to the ECCE/EREG in the centralized EPDCCH group of embodiment 1 and embodiment 2.
Figure 10 illustrates the flow chart for the method for control information transmission in transmission/reception point according at least one embodiment;
Figure 11 illustrates the flow chart for the method for receiving control information in a user device according to other embodiment;
Figure 12 is the schematic diagram of the transmission/reception point illustrated according to some embodiments; And
Figure 13 is the schematic diagram of the subscriber equipment illustrated according to some embodiments
Embodiment
Hereinafter, with reference to accompanying drawing, exemplary embodiment of the present invention is described.In the following description, although same unit is illustrated same unit in different figures will be specified by same reference numeral.And in the following describes of the present embodiment, the known function comprised herein and being described in detail in of configuration will be omitted when it makes theme of the present invention not know.
Wireless communication system according at least one embodiment can be widely used, so that provide various communication service such as voice service, packet data service etc.Wireless communication system can comprise: subscriber equipment (UE) and at least one transmission/reception point.In this manual, term " subscriber equipment (UE) " is as the universal of the terminal comprised in radio communication.Therefore, subscriber equipment (UE) should be interpreted as comprising the concept of the subscriber equipment used in wireless device in mobile radio station (MS), user terminal (UT), subscriber station (SS) and/or global system for mobile communications (GSM) and Wideband Code Division Multiple Access (WCDMA) (WCDMA), Long Term Evolution (LTE) and/or high-speed packet access (HSPA).
Transmission/reception point can indicate the station with communications of user equipment.This transmission/reception point can be called different term such as base station (BS), community, 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.
Namely, in this manual, base station (BS) or community can be interpreted as the containing concept indicating a part of region or the function covered by the eNB in the base station controller (BSC) in code division multiple access (CDMA), Node-B, the LTE in WCDMA or sector (website) etc.Therefore, the concept of transmission/reception point, base station (BS) and/or community can comprise various overlay area, such as large community, macrocell, Microcell, picocell, Femto cell etc.And this conception of species can comprise the communication range of via node (RN), long distance wireless dateline (RRH) or radio unit (RU).
In this manual, subscriber equipment and transmission/reception point can for having two the transmission/reception main bodys containing meaning, and two transmission/reception main bodys for embodying technology disclosed herein and technological concept, and can be not limited to concrete term or word.And, subscriber equipment and transmission/reception point can for having the up link or downlink transmission/reception main body that contain meaning, this up link or downlink transmission/reception main body for embodying the disclosed technology relevant with the present invention and technological concept, and can be not limited to concrete term or word.In this article, up link (UL) transmission/reception is wherein by the scheme of data from user device transmissions to base station.Alternatively, down link (DL) transmission/reception is wherein by the scheme of data from base-station transmission to subscriber equipment.
Wireless communication system can use various Multiple Access scheme such as CDMA, time division multiple access (TDMA), frequency division multiple access (FDMA), OFDM (OFDMA), OFDM-FDMA, OFDM-TDMA, OFDM-CDMA etc.But this Multiple Access scheme is not limited thereto.The Resourse Distribute that at least one embodiment can be applied to the Resourse Distribute in the asynchronous wireless communication field being evolved to LTE and LTE-advanced (LTE-A) by GSM, WCDMA and HSP and evolve in the sychronous wireless communication field of CDMA, CDMA-2000 and UMB.The present invention should not be interpreted as being limited by the specific wireless communications field or retraining, and should be interpreted as comprising all technical fields that spirit of the present invention can be applied to.
When ul transmissions and downlink transmission, in time division multiplexing (TDD) and frequency division multiplexing (FDD), at least one can be used.In this article, TDD can use different time to perform uplink/downlink transmission.FDD can use different frequency to perform uplink/downlink transmission.
In the LTE consistent with corresponding standard or lte-a system, up link and/or down link can be built based on a carrier wave or a pair carrier wave.When up link and/or down link, control information transmission can be carried out by control channel such as physical downlink control channel (PDCCH), Physical Control Format Indicator Channel (PCFICH), physical mixed ARQ indicating channel (PHICH), physical uplink control channel (PUCCH) etc.Data can be transmitted by data channel such as physical down link sharing channel (PDSCH), physical uplink link shared channels (PUSCH) etc.
In this manual, term " community " can indicate the covering of the signal transmitted from transfer point or transmission/reception point, the component carrier with this covering and transmission/reception point.In this article, term " transmission/reception point " can indicate in the transfer point of signal transmission, the acceptance point of Received signal strength and combination (i.e. transmission/reception point) thereof.
Fig. 1 is the schematic diagram that the wireless communication system that at least one embodiment can be applied to is shown.
With reference to Fig. 1, wireless communication system 100 can be one in cooperative multipoint transmission/reception (CoMP) system, cooperation multi-aerial transmission system and cooperation multi-cell communication systems.Here, CoMP system can carry out signal transmission by the cooperation between multiple transmission/reception point.Wireless communication system 100 such as CoMP system can comprise multiple transmission/reception point 110 and 112 and at least one subscriber equipment (UE) 120 and 122.
As shown in the figure, transmission/reception point can be in transmission/reception point (such as eNB) 110 and transmission/reception point (such as RRH) 112.Here, eNB 110 can be base station or macrocell (or grand node).RRH 112 can at least one picocell controlled through a cable to eNB 110 by optical cable or coupling fiber.In addition, RRH 112 can have large transmission power or low transmission power in macrocell.Transmission/reception point eNB 110 and RRH 112 can have same cells mark (ID) or different districts mark.
Hereinafter, down link (DL) can represent from transmission/reception point 110 and 112 communicating or communication path to subscriber equipment 120.Up link (UL) can represent from subscriber equipment 120 to transmission/reception point 110 and 112 communicate or communication path.In the downlink, transmitter can be a part for transmission/reception point 110 and 112, and receiver can be a part for subscriber equipment 120 and 122.In the uplink, transmitter can be a part for subscriber equipment 120, and receiver can be a part for transmission/reception point 110 and 112.
Hereinafter, the expression of " transmission or receive PUCCH, PUSCH, PDCCH and/or PDSCH " wherein can be called by the situation of the transmission such as channel such as PUCCH, PUSCH, PDCCH and/or PDSCH or Received signal strength.
ENB (such as 110) can perform the downlink transmission of subscriber equipment (such as 120 and/or 122).ENB (such as 110) can transmit the PDSCH corresponding with primary physical channel, for unicast transmission.And, eNB (such as 110) can transmit PDCCH, so that communicating downlink control information (such as, for receiving the schedule information of PDSCH) and transmission is used for the scheduling authorization information transmitted of uplink shared channel (such as PUSCH).Hereinafter, " by transmission or Received signal strength " can be called the expression of " transmission or receive channel ".
In wireless communications, a radio frame can comprise 10 subframes, and a subframe can comprise two time slots.Radio frame can have the length of 10ms, and subframe can have the length of 1.0ms.Typically, the base unit of transfer of data can be subframe, and downlink scheduling or uplink scheduling can perform in units of subframe.When standard cyclic prefix (CP), time slot can comprise 7 OFDM symbol in time domain.When Cyclic Prefix (CP) that expand, time slot can comprise 6 OFDM symbol in time domain.
Such as, the frequency domain in radio communication can be formed in units of the subcarrier with 15kHz interval.
In the downlink, running time-frequency resource can with Resource Block (RB) for unit determines.Resource Block (RB) can comprise a time slot in time shaft and the 180kHz in frequency axis (12 subcarriers).Comprise " subcarrier (corresponding to 2 time slots) in time shaft " and the Resource Unit of " 12 subcarriers in frequency axis " can be called " Resource Block is to (RBP) ".The total quantity of Resource Block can be different according to system bandwidth.
Resource Unit (RE) can comprise an OFDM symbol in time shaft and a subcarrier in frequency axis.A Resource Block can comprise " 14 × 12 Resource Units " (when standard C P) or " 12 × 12 Resource Units " (when the CP expanded) to (RBP).
Resource Block when Fig. 2 shows standard cyclic prefix (standard C P) to (RBP), as the example of the structure of the down-chain resource in Long Term Evolution (LTE) or senior LTE (LTE-A) system.
With reference to Fig. 2, when standard cyclic prefix (CP), Resource Block to (RBP) can comprise 14 OFDM symbol (l=0,1 ..., 13) and 12 subcarriers (k=0 ..., 11).Shown in figure 2 in embodiment, a Resource Block can comprise 14 OFDM symbol to (RBP).In 14 OFDM symbol, three OFDM symbol (l=0 ~ 2) above can be corresponding with the control area 210 distributed for control channel such as Physical Control Format Indicator Channel (PCFICH), physical mixed ARQ indicating channel (PHICH), physical downlink control channel (PDCCH) etc.Remaining OFDM symbol (l=3 ~ 13) can be corresponding with the data channel 220 distributed for data channel such as physical down link sharing channel (PDSCH).Although be assigned with three OFDM symbol for control area 210 in fig. 2, can be that one to four OFDM symbol is distributed in control area 210 according to embodiment.The information relevant with the size of control area 210 can be shifted by PCFICH.Here, dimension information can be set to the quantity of OFDM symbol.
PDCCH can be transmitted by whole system bandwidth, and PDSCH can transmit based on Resource Block.Subscriber equipment can identify corresponding PDCCH (namely distributing to the PDCCH of subscriber equipment), and enters micro-sleep pattern when there are not data (namely for the data of subscriber equipment) in the PDCCH in correspondence.Therefore, the power consumption of subscriber equipment in data area 220 can be reduced.
With reference to Fig. 2, reference signal can be mapped to the particular resource unit of down link.Namely public reference signal (or cell specific reference signal, hereinafter referred to as " CRS ") 230, demodulated reference signal (DM-RS) (or UE specific reference signals) 232 and 234, channel state information reference signals (CSI-RS) etc. can be transmitted by down link.In fig. 2, for convenience, illustrate only CRS 230 and DM-RS232 and 234.
CRS 230 in control area 210 may be used for performing the channel estimating of decoding to PDCCH.CRS 230 in data area 220 may be used for downlink channel and measures.DM-RS 232 and/or 234 can be used to perform the channel estimating of the data decode of data area 220.Can use orthogonal code that DM-RS 232 and 234 is multiplexed with the reference signal for multiple layers.Such as, when 4 layers of transmission, two different reference signals for each reference signal group can be come multiplexing by " having the orthogonal code of 2 length " being applied to " two in time shaft continuous reference signal resource unit ".When 8 layers of transmission, four different reference signals for each reference signal group can be come multiplexing by " having the orthogonal code of 4 length " being applied to " four the reference signal resource unit distributed in time shaft ".
When 1 layer of transmission or 2 layers of transmission, due to the reference signal that can only use a DM-RS group (such as DM-RS group 1 (232)) to transmit every layer, so another DM-RS group (such as DM-RS group 2 (234)) may be used for transfer of data.The DM-RS corresponding with every layer can carry out precoding according to the pre-coding scheme being applied to every layer, and is transferred to subscriber equipment.Therefore, receiving terminal (such as subscriber equipment) can perform data decode when not having the precoding information applied in transmission ends (such as base station).
In order to effectively use limited resources in a wireless communication system, control channel may be needed.But the resource of control area 210 can be corresponding with overhead, and therefore reduce the resource that can be used for the data area 220 of transfer of data.Based in the LTE system of OFDM, a Resource Block can comprise 14 or 12 OFDM symbol to (RBP).In OFDM symbol, maximum three OFDM symbol may be used for control area 210, and remaining OFDM symbol may be used for data area 220.Meanwhile, can transmit in the lte-a system of data to more users, power system capacity strengthens can be limited due to the limited resources of typical control area (such as 210).Therefore, in order to increase control channel resource, consider the method that may need transmission/reception multi-user control channel, such as, in data area 220, use space division multiplexing scheme.In other words, this method can in data area 210 transmission/reception control channel.Such as, in data area 220, the control channel of transmission can be called " PDCCH of expansion " or " PDCCH of enhancing " (EPDCCH), and is not limited thereto.
In typical (or existing) 3GPP LTE/LTE-A rel-8/9/10 system, in order to receiving downlink DCI, all subscriber equipmenies are determined by the PDCCH that " previous, two or three OFDM symbol " (when system bandwidth >10PRB) or " the first two, three or four OFDM symbol " (when system bandwidth≤10PRB) in downlink subframe transmits.The base unit transmitted for the PDCCH of special user equipment can be control channel unit (CCE).Here, a CCE can comprise 9 resource unit group (REG).REG can comprise four continuous print Resource Units (RE) in frequency axis.Particularly, a REG four continuous resource unit (RE) can different physical channels (such as PCFICH, PHICH) in the PDCCH region getting rid of downlink subframe corresponding to transmission and physical signalling (such as CRS) Resource Unit (RE) surplus resources unit (RE) in selection.
Different from above-mentioned old PDCCH, can be assigned with in the PDSCH region of down link pilot timeslot (DwPTS) in downlink subframe or specific sub-frame with the EPDCCH that 3GPP LTE/LTE-A issues up-to-date employing (or restriction) in 11 and the system that is associated of subsequent issued.And 3GPPLTE/LTE-A issue 11 and subsequent issued thereof define respective cell can for being configured to the EPDCCH group of user equipment allocation K the quantity by EPDCCH receiving downlink control information (DCI).Here, each EPDCCH group can comprise " M " individual PRB group." M " is for being more than or equal to " 1 " and being less than or equal to the natural number of the quantity of the PRB be associated with downlink bandwidth.The maximum of " K " may be selected one in 2,3,4 and 6.And each in the multiple EPDCCH groups determined for given subscriber equipment can have difference " M " numerical value.
EPDCCH group can be corresponding with centralized (localized) type or distributed (distributed) type according to EPDCCH transport-type.For both centralized type and distributed-type, above-mentioned " M " can be 2,4 or 8 and be not limited thereto.
Meanwhile, can for the EPDCCH group of a user equipment allocation K quantity.In this case, because each EPDCCH group is distributed type or centralized type, so can for the distributed EPDCCH group of the centralized EPDCCH group of a user equipment allocation KL quantity and KD quantity.Namely the summation of KL and KD can be " K " (KL+KD=K).
In order to perform the EPDCCH resource mapping for given subscriber equipment, the REG (EREG) of the enhancing corresponding with REG or CCE of typical PDCCH or the CCE (ECCE) strengthened can be used or limit in EPDCCH.
When the EREG/ECCE of up-to-date restriction, 16 EREG (such as EREG#0 to EREG#15) altogether can be comprised a PRB centering of each EPDCCH group.Particularly, a PRB is to comprising 16 EREG altogether, regardless of (i) frame structure type, (ii) sub-frame configuration, (iii) length of Cyclic Prefix (CP), (iv) size of old PDCCH control area, and/or whether (v) exists other reference signal (such as CRS, CSI-RS, PRS etc.) except DM-RS.
More specifically, when standard cyclic prefix (CP), a PRB in specific EPDCCH group is to comprising 168 Resource Units (RE) (such as, 12 × 14=168 RE) altogether.In this case, EREG can be performed for the surplus resources unit (RE) (such as 144 RE) of discharging outside " 24 Resource Units (RE) for DM-RS " from 168 Resource Units (RE) to index.In other words, EREG index can according to first frequently scheme (namely first frequency and then time mode) use 16 numerals (such as 0,1,2 ..., 15) perform.Therefore, can from 0 to 15 by the Resource Unit (RE) of correspondence numbering (namely indexing).In like manner, when Cyclic Prefix (CP) that expand, a PRB in certain EPDCCH group is to comprising 144 Resource Units (RE) (such as, 12 × 12=144RE) altogether.In this case, the surplus resources unit (RE) (such as 128 RE) can discharged from 144 Resource Units (RE) outside " 16 Resource Units (RE) for DM-RS " performs EREG and indexs.In other words, EREG index can according to first frequently scheme (namely first frequency and then time mode) use 16 numerals (such as 0,1,2 ..., 15) perform.Therefore, can from 0 to 15 by corresponding Resource Unit (RE) numbering (namely indexing).
In the downlink subframe (" standard DL subframe ") with standard cyclic prefix (CP), the embodiment be associated with the EREG program of indexing right for PRB in specific EPDCCH group is described with reference to Fig. 3 to Fig. 8.In Fig. 3 to Fig. 8, do not have the skew broken line part of numeral can represent Resource Unit (RE) for DS-RS, and there is the skew broken line part of numeral or dot pattern part can represent Resource Unit (RE) for CRS transmission.
Fig. 3 shows and to use when a transmit antenna port (such as CRS port 0) cyclic shift based on symbol to index program and being mapped by the Resource Unit (RE) that the Physical Resource Block (PRB) of indexing is right according to EREG.
With reference to Fig. 3, can according to first scheme (namely first frequency and then time mode) and from 0 to 15 by EREG numbering (namely indexing) frequently.In the embodiment show in figure 3, the cyclic shift based on symbol can be used to perform to index.More specifically, as shown in Figure 3, after the Resource Unit (RE) pointed out by " 300 " in the first symbol is indexed and is 11 (i.e. indexes 11), it is 12 (i.e. indexes 12) that the contiguous RE pointed out by " 310 " in the second symbol is successively indexed.In the same manner, after the Resource Unit (RE) pointed out by " 320 " in the second symbol is indexed and is 7 (i.e. indexes 7), it is 8 (i.e. indexes 8) that the contiguous RE pointed out by " 330 " in the 3rd symbol is successively indexed.
Physical Resource Block (PRB) shown in Fig. 3 is to being associated with CRS port 0.As shown in Figure 3, CRS can be mapped to 8 Resource Units (RE).In other embodiments, CRS can be mapped to the RE being in other position according to frequency shift.
Fig. 4 shows and to use when two transmit antenna ports (such as CRS port 0 and 1) cyclic shift based on symbol to index program and being mapped by the Resource Unit (RE) that the Physical Resource Block (PRB) of indexing is right according to EREG.Fig. 5 shows and to use when four transmit antenna ports (such as CRS port 0,1,2 and 3) cyclic shift based on symbol to index program and being mapped by the RE that the PRB that indexs is right according to EREG.
The cyclic shift based on symbol can be used to index the Resource Unit (RE) shown in Fig. 4 and Fig. 5 in the mode identical with Fig. 3." 8 extra RE " and " RE for the CRS shown in Fig. 3 " can be mapped to for CRS port 0 and 1 at Fig. 4, CRS.In Figure 5, CRS can for CRS port 0,1,2, and 3 and be mapped to " 8 extra RE " and " RE for the CRS shown in Fig. 4 ".
When each OFDM symbol execution EREG indexs, Fig. 3 to Fig. 5 illustrates the embodiment that cyclic shift is applied to, and Fig. 6 to Fig. 8 illustrates the embodiment that cyclic shift is not applied to.
Fig. 6 to show when a transmit antenna port (such as CRS port 0) and not to index program and being mapped by the RE that the PRB that indexs is right according to EREG when having cyclic shift.Fig. 7 to show when two transmit antenna ports (such as CRS port 0 and 1) and not to index program and being mapped by the RE that the PRB that indexs is right according to EREG when having cyclic shift.Fig. 8 to show when four transmit antenna ports (such as CRS port 0,1,2 and 3) and not to index program and being mapped by the RE that the Physical Resource Block (PRB) of indexing is right according to EREG when having cyclic shift.
In Fig. 6 to Fig. 8, the mapping of CRS can be performed in the mode identical with Fig. 3 to Fig. 5.But the scheme of indexing used can be different.
Typically, with reference to Fig. 6, can according to first scheme (namely first frequency and then time mode) and from 0 to 15 by EREG numbering (namely indexing) frequently.In the embodiment show in figure 6, execution can index when the cyclic shift not based on symbol.More specifically, as shown in Figure 6, after the Resource Unit (RE) pointed out by " 600 " in the first symbol is indexed and is 11 (i.e. indexes 11), it is 12 (i.e. indexes 12) that the RE pointed out by " 610 " in the second symbol is successively indexed.Here, index be 12 RE (" 610 ") (namely corresponding with next one RE (" 610 ")) not with index be 11 RE (" 600 ") adjacent.In the same manner, after the RE pointed out by " 620 " in the second symbol is indexed and is 7 (i.e. indexes 7), it is 8 (i.e. indexes 8) that the RE pointed out by " 630 " in the 3rd symbol is successively indexed.Here, index be 8 RE (" 630 ") (namely corresponding with next one RE (" 630 ")) not adjacent with the RE (" 620 ") by indexing being 7.
In Fig. 3 to Fig. 8, the RE with same index can be divided into an EREG.Therefore, when a PRB is right, 16 EREG (such as, EREG#0 to EREG#15) altogether can be distributed.Fig. 3 to Fig. 8 illustrates and has the PRB of standard C P to the embodiment be associated.That is, there is a PRB of standard C P to comprising 16 EREG altogether.In like manner, when a PRB with expansion CP is right, 16 EREG (such as, EREG#0 to EREG#15) altogether can be distributed.That is, there is a PRB of expansion CP to comprising 16 EREG altogether.
According to Fig. 3 to Fig. 8, the EREG of PRB centering configuration (such as, EREG#0, EREG#1 ..., EREG#15) in each can comprise 9 RE.But as shown in Fig. 3 to Fig. 8, the quantity that can be used for the RE of EPDCCH transmission of every EREG can be different according to the size of the quantity of transmit antenna port (or CRS port numbers) and old PDCCH control area.
Return Fig. 3, the total quantity of the RE corresponding with index #0 is 9.But, when the region be associated with " above three OFDM symbol " (l=0 ~ 2) is confirmed as control area, the RE that control area comprises can not transmit EPDCCH, and therefore in the RE that can be used for EPDCCH transmission, gets rid of these RE.Therefore, EREG#0 can comprise 6 available RE altogether.When the EREG corresponding with index #1, by index for #1 RE add up to 9.In this case, the RE (RE such as, pointed out by " 340 " in Fig. 3) that RE in (i) control area (region be such as associated with first three OFDM symbol) and (ii) CRS is mapped to can be got rid of.Therefore, EREG#1 can comprise the available RE of sum 5.
The each ECCE corresponding with the base unit that EPDCCH transmits can comprise the EREG of " N " individual quantity according to subframe type and CP length.More specifically, N numerical value can be determined as follows.
In at least one embodiment, there is the standard subframe of standard C P and (ii) has specific sub-frame configuration 3 at (i), when the specific sub-frame of 4 or 8 and standard C P, N numerical value can be confirmed as " 4 " (N=4).In other words, in this case, if comprise 16 EREG a PRB centering, then 4 ECCE altogether can be configured because each ECCE comprises 4 EREG.
In other embodiments, at (i), there is the expansion standard subframe of CP, (ii) have specific sub-frame configuration 1,2,6, the specific sub-frame of 7 or 9 and standard C P and (iii) have specific sub-frame configuration 1,2,3, when the specific sub-frame of 5 or 6 and expansion CP, N numerical value can be confirmed as " 8 " (N=8).In other words, in this case, if comprise 16 EREG a PRB centering, then 2 ECCE altogether can be configured because each ECCE comprises 8 EREG.
When particular downlink subframe (such as standard DL subframe), typical PDCCH can be transmitted by " one, two or three OFDM symbol " or " two, three or four OFDM symbol " above above.And a CCE can comprise 9 REG.Therefore, the CCE in PDCCH can comprise 36 (=9 × 4) individual RE.
But, as as described in reference to Fig. 3 to Fig. 8, when EPDCCH, can index to perform EREG with every RE when not considering size (i.e. the size of old PDCCH region) and the RE for other reference signal such as CRS and CSI-RS of old control area.Therefore, the quantity that can be used for the RE of EPDCCH transmission can be different according to the existence of other reference signal (such as CRS, CSI-RS etc.) in the size of old control area and particular downlink subframe.
In other words, the quantity that can be used for the RE of EPDCCH transmission can be different with every EREG.Therefore, when the ECCE corresponding with the base unit that EPDCCH transmits, different RE is uneven with every ECCE can to there is the quantity of available RE.
In order to overcome this problem, the present embodiment can provide a kind of mapping method setting up the EREG of each ECCE.Particularly, the present embodiment can provide a kind of for performing the method that ECCE/EREG maps (or can be called " ECCE to EREG mapping ") in centralized EPDCCH group (i.e. the EPDCCH group of centralized type).
More specifically, the present embodiment can provide a kind of method of each ECCE for configuring the PRB centering setting up above-mentioned centralized EPDCCH group.Particularly, the present embodiment can consider old PDCCH and CRS that transmitted by the down link pilot timeslot (DwPTS) in all downlink subframe and specific sub-frame.Therefore, the present embodiment can provide relatively best ECCE/EREG mapping method by the quantity of the useful RE for EPDCCH transmission considering corresponding PRB centering.
Real execute example 1: use the ECCE of the continuous EREG of N number of quantity to configure
Embodiment 1 can provide a kind of for using the continuous EREG of N number of quantity to configure the method for an ECCE and a kind of for performing according to ECCE configuration the method that ECCE indexs.In this article, the continuous EREG of N number of quantity is included in a PRB centering in EPDCCH group.
When old PDCCH region is of a size of " 1 " individual OFDM symbol, according to each CRS port arrangement, every EREG, the quantity of available resource units (RE) can be arranged as shown in Table 1 below.
[table 1]
CRS port 0 CRS port 0,1 CRS port 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 superincumbent table 1, the EREG index that the quantity of the available resource units (RE) of every EREG is not applied to based on cyclic shift is placed.In the subframe of correspondence, an ECCE can comprise 4 EREG (when N=4).Therefore, according to embodiment 1, when an ECCE comprises four continuous EREG, the quantity setting up the EREG of each EREG and the available RE of every ECCE can be arranged as shown in Table 2 below.
[table 2]
ECCE EREG 1 Tx CRS 2 Tx CRS 4 Tx CRS
1 stECCE EREG＃0～EREG＃3 29 REs 27 REs 26 REs
2 ndECCE EREG＃4～EREG＃7 32 REs 31 REs 29 REs
3 rdECCE EREG＃8～EREG＃11 30 REs 28 REs 28 REs
4 thECCE EREG＃12～EREG＃15 35 REs 34 REs 33 REs
When four transmit antenna ports (" 4 Tx CRS "), 1 steCCE can comprise 26 available RE, and 4 theCCE can comprise 33 available RE.Therefore, 1 steCCE and 4 thrE difference between ECCE can be " 7 ".Like this, different RE is uneven according to every ECCE can to there is the quantity of available RE.
Even if when old PDCCH region is of a size of " 2 " individual (table 3) or " 3 " individual (table 5) OFDM symbol, following similar characteristics can be there is.
[table 3]
CRS port 0 CRS port 0,1 CRS port 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
When old PDCCH region is of a size of " 2 " individual OFDM symbol, table 3 above can represent the quantity of the available RE of the every EREG according to each CRS port arrangement.Under the same case of such as Fig. 3, when an ECCE comprises four continuous print EREG, the quantity setting up the EREG of each EREG and the available RE of every ECCE can be arranged as shown in Table 4 below.
[table 4]
ECCE EREG 1 Tx CRS 2 Tx CRS 4 Tx CRS
1 stECCE EREG＃0～EREG＃3 25 REs 23 REs 22 REs
2 ndECCE EREG＃4～EREG＃7 28 REs 27 REs 25 REs
3 rdECCE EREG＃8～EREG＃11 30 REs 28 REs 28 REs
4 thECCE EREG＃12～EREG＃15 31 REs 30 REs 29 REs
When four transmit antenna ports (" 4 Tx CRS "), 1 steCCE can comprise 22 available RE, and 4 theCCE can comprise 29 available RE.Therefore, 1 steCCE and 4 thrE difference between ECCE can be " 7 ".
[table 5]
CRS port 0 CRS port 0,1 CRS port 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
When old PDCCH region is of a size of " 3 " individual OFDM symbol, table 5 above can represent the quantity of the available RE of the every EREG according to each CRS port arrangement.Under the same case of such as Fig. 5, when an ECCE comprises four continuous print EREG, the quantity setting up the EREG of each EREG and the available RE of every ECCE can be arranged as shown in Table 6 below.
[table 6]
ECCE EREG 1 Tx CRS 2 Tx CRS 4 Tx CRS
1 stECCE EREG＃0～EREG＃3 21 REs 19 REs 18 REs
2 ndECCE EREG＃4～EREG＃7 28 REs 27 REs 25 REs
3 rdECCE EREG＃8～EREG＃11 26 REs 24 RES 24 REs
4 thECCE EREG＃12～EREG＃15 27 REs 26 REs 25 REs
When four transmit antenna ports (" 4 Tx CRS "), 1 steCCE can comprise 18 available RE, and 4 theCCE can comprise 25 available RE.Therefore, 1 steCCE and 4 thrE difference between ECCE can be " 7 ".
When the specific EPDCCH of the group comprising " M " individual PRB (M can be 2,4,8 or 16) is centralized type, the ECCE setting up corresponding EPDCCH group can configure according to embodiment 1, as described below.
More specifically, when setting up the PRB of M quantity of centralized EPDCCH group, ECCE can according to embodiment 1 from minimum PRB to indexing according to ascending order the PRB of minimum PRB index (namely have to) and configuring.
With reference to Fig. 9 (a), the ECCE for ECCE configuration in corresponding centralized EPDCCH group indexs and EREG maps and can be performed as follows.First, minimum PRB centering, 1 of EREG#0 to EREG#3 is comprised steCCE can be indexed as ECCE#0.Comprise 2 of EREG#4 to EREG#7 ndeCCE can be indexed as ECCE#1.Comprise 3 of EREG#8 to EREG#11 rdeCCE can be indexed as ECCE#2.Comprise 4 of EREG#12 to EREG#15 theCCE can be indexed as ECCE#3.After this, when the PRB with the second minimum PRB index is right, ECCE configuration and ECCE index and can perform in the same manner.More specifically, the second minimum PRB centering, 1 steCCE, 2 ndeCCE, 3 rdeCCE and 4 theCCE can comprise EREG#0 to EREG#3, EREG#4 to EREG#7, #8 to EREG#11, EREG#12 to EREG#15 respectively.1 steCCE, 2 ndeCCE, 3 rdeCCE and 4 theCCE is indexed respectively as ECCE#4, ECCE#5, ECCE#6 and ECCE#7.Similarly, there is M theach in four ECCE of the PRB centering configuration of minimum PRB index can be indexed as ECCE# (4M-4) respectively, ECCE# (4M-3), ECCE# (4M-2) and ECCE# (4M-1).
Alternatively, when comprising the EPDCCH group of PRB of M quantity, ECCE indexs can each PRB centering from 1 steCCE performs successively.In this article, 1 steach in ECCE can comprise EREG#0, EREG#1, EREG#2 and EREG#3 each PRB centering.
First, with reference to Fig. 9 (b), can by 1 of individual to " M " quantity steCCE with the incremental order of the PRB index of correspondence (namely comprising the index of the PRB of the correspondence of each ECCE) from ECCE#0 number consecutively to ECCE# (M-1).In other words, can from minimum PRB to M thminimum PRB performs (namely maximum PRB to) and is used for 1 of M quantity stthe ECCE of ECCE indexs.In this article, " M " individual quantity 1 steCCE can comprise from " minimum PRB right 1 steCCE " arrive " M thminimum PRB is to 1 of (i.e. maximum PRB to) steCCE ".1 steach in ECCE can comprise EREG#0, EREG#1, EREG#2 and EREG#3.The second, can by 2 of individual to " M " quantity ndeCCE with the incremental order of the PRB index of correspondence from ECCE#M number consecutively (namely indexing) to ECCE# (2M-1).In other words, can from minimum PRB to maximum PRB to (i.e. M thminimum PRB to) perform be used for M quantity 2 ndthe ECCE of ECCE indexs.In this article, each PRB centering 2 ndeCCE can comprise EREG#4, EREG#5, EREG#6 and EREG#7.3rd, in like manner, can by 3 rdeCCE with the incremental order of the PRB index of correspondence from ECCE#2M number consecutively (namely indexing) to ECCE# (3M-1).In this article, each PRB centering 3 rdeCCE can comprise EREG#8 to EREG#11.4th, in like manner, can by 4 theCCE with the incremental order of the PRB index of correspondence from ECCE#3M number consecutively (namely indexing) to ECCE# (4M-1).In this article, each PRB centering 4 theCCE can comprise EREG#12 to EREG#15.
embodiment 2: use and have when EREG index is divided by the EREG of same remainder time 4 (or 2) eCCE configuration
As known, when an ECCE configures by only binding four continuous print EREG, the imbalance of the quantity of the available RE of every ECCE can be there is above.Unbalanced main cause may be: the availability of 12 the continuous print REs corresponding with OFDM symbol is determined according to the size of old PDCCH region.In other words, in 16 EREG, the difference between " with the EREG that 12 continuous print RE are associated " and " EREG be associated with 4 not corresponding with 12 continuous print RE continuous print RE " can occur.
In order to overcome this imbalance, embodiment 2 can provide a kind of for by be bundled in a PRB centering setting up EPDCCH group, have when correspondence EREG index divided by same remainder 4 (i.e. EREG index mod 4) (such as, 0,1,2, or 3) EREG configures the method for an ECCE.In this article, " mod " expression " mould " computing.
Therefore, each ECCE can be configured as follows.
1 steCCE: the EREG#n corresponding with (n mod 4)=0
2 ndeCCE: the EREG#n corresponding with (n mod 4)=1
3 rdeCCE: the EREG#n corresponding with (n mod 4)=2
4 theCCE: the EREG#n corresponding with (n mod 4)=3
In this article, n=0,1,2 ..., 15." n " can represent the EREG index shown in Fig. 3 to Fig. 8.
More specifically, the PRB centering that specific EPDCCH group is associated, (i) 1 is steCCE can comprise EREG#0, EREG#4, EREG#8, and EREG#12, (ii) 2 ndeCCE can comprise EREG#1, EREG#5, EREG#9, and EREG#13, (iii) 3 rdeCCE can comprise EREG#2, EREG#6, EREG#10, and EREG#14, (iv) 4 theCCE can comprise EREG#3, EREG#7, EREG#11, and EREG#15.When ECCE is configured as mentioned above, the size according to old PDCCH region that the useful RE of every ECCE can be following calculates.
When old PDCCH region is of a size of " 1 " individual OFDM symbol, the quantity setting up the EREG of each ECCE and the available RE of every ECCE can be configured as follows shown in the table 7 in face.
[table 7]
When old PDCCH region is of a size of " 2 " individual OFDM symbol, the quantity setting up the EREG of each ECCE and the available RE of every ECCE can be configured as follows shown in the table 8 in face.
[table 8]
When old PDCCH region is of a size of " 3 " individual OFDM symbol, the quantity setting up the EREG of each ECCE and the available RE of every ECCE can be configured as follows shown in the table 9 in face.
[table 9]
As mentioned above, when " mould 4 " computing is applied to each EREG index value of the PRB centering comprised in EPDCCH group, an ECCE can configure by binding four EREG with same modulus value.In this article, with the same modulus value that " mould 4 " computing is associated can with when each EREG index value divided by 4 time same remainder corresponding.This ECCE collocation method can overcome the imbalance of the quantity of the available RE of every ECCE.
Even if when the EREG of every OFDM symbol index use cyclic shift to perform, this ECCE collocation method can be applied in the same manner.
Therefore, when the specific EPDCCH group of the group (namely comprising the PRB group of the PRB of M quantity) comprising M PRB is centralized type, ECCE can configure in the EPDCCH group of correspondence according to embodiment 2 as described herein.
Even if when ECCE configures according to embodiment 2, the ECCE be associated with the PRB of M the quantity forming centralized EPDCCH group indexs and can perform according to two ECCE schemes of indexing based on embodiment 1.More specifically, ECCE index can from " minimum PRB right 1 steCCE " perform " M thminimum PRB is to 4 of (i.e. maximum PRB to) theCCE ".In this article, minimum PRB is to representing the PRB couple with minimum PRB index.1 steCCE can for according to embodiment 2 above, correspondence PRB centering, the ECCE that comprises EREG#0, EREG#4, EREG#8 and EREG#12.M thminimum PRB is to representing to have M ththe PRB couple of minimum PRB index (i.e. maximum PRB index).4 theCCE that ECCE can be the PRB centering of correspondence, that comprise EREG#3, EREG#7, EREG#11 and EREG#15.
With reference to Fig. 9 (a), when each centralized EPDCCH group comprises the PRB of M quantity, 1 of minimum PRB centering steCCE, 2 ndeCCE, 3 rdeCCE and 4 theCCE can be indexed as ECCE#0, ECCE#1, ECCE#2 and ECCE#3 respectively.In this article, 1 steCCE can comprise EREG#0, EREG#4, EREG#8 and EREG#12.2 ndeCCE can comprise EREG#1, EREG#5, EREG#9 and EREG#13.3 rdeCCE can comprise EREG#2, EREG#6, EREG#10 and EREG#14.4 theCCE can comprise EREG#3, EREG#7, EREG#11 and EREG#15.After this, 2 ndminimum PRB centering, 1 steCCE, 2 ndeCCE, 3 rdeCCE and 4 theCCE can be indexed as ECCE#4, ECCE#5, ECCE#6 and ECCE#7 to same way respectively with minimum PRB.According to above-mentioned ECCE index, M thminimum PRB is to 4 in (i.e. maximum PRB to) theCCE (namely comprising EREG#3, the ECCE of EREG#7, EREG#11 and EREG#15) can be indexed as ECCE# (4M-1).
In other embodiments, go back with reference to Fig. 9 (b), can by every PRB to 1 of configuration steCCE (such as comprising EREG#0, the ECCE of EREG#4, EREG#8 and EREG#12) is from ECCE#0 number consecutively (namely indexing) to ECCE# (M-1).In like manner, can by every PRB to 2 of configuration ndeCCE is from ECCE#M number consecutively (namely indexing) to ECCE# (2M-1).Can by every PRB to 3 of configuration rdeCCE is from ECCE#2M number consecutively (namely indexing) to ECCE# (3M-1).Can by every PRB to 4 of configuration theCCE is from ECCE#3M number consecutively (namely indexing) to ECCE# (4M-1).
So far, when the quantity of the EREG of an establishment ECCE is 4 (N=4), the ECCE/EREG described in corresponding centralized EPDCCH group maps and ECCE index.In this article, (i) have the standard down link subframe of standard C P and (ii) there is the specific sub-frame 3,4 and 8 of standard C P can be corresponding with the situation of N=4.
Equally, even if when the quantity of the EREG of an establishment ECCE is 8 (N=8), above-mentioned ECCE/EREG maps and ECCE index can be employed.In this article, (i) has the expansion standard down link subframe of CP, (ii) have the specific sub-frame 1,2 of standard C P, 6,7 and 9 and (iii) have expansion CP specific sub-frame 1,2,3,5 and 6 can be corresponding with the situation of N=4.
As with reference to as described in embodiment 1, when setting up each PRB of centralized EPDCCH to when comprising 16 EREG, each ECCE can configure by binding four continuous print EREG, and therefore 4 ECCE can with every PRB to configuring.In other embodiments, each ECCE can replace four continuous print EREG to configure by binding eight continuous print EREG.Therefore, in other embodiment this, 1 steCCE (comprising EREG#0 to EREG#7) and 2 ndeCCE (comprising EREG#8 to EREG#15) can be configured in each PRB centering.Meanwhile, as with reference to as described in embodiment 2, when setting up each PRB of centralized EPDCCH to when comprising 16 EREG, each ECCE can configure by binding four EREG according to the result of " mould 4 " computing.More specifically, when " mould 4 " computing is applied to each EREG index value, each ECCE can configure by binding four EREG with same modulus value.In this article, with the same modulus value that " mould 4 " computing is associated can with when each EREG index value divided by 4 time same remainder corresponding.In other embodiments, " mould 2 " computing can be used to replacement " mould 4 " computing.Therefore, in other embodiment this, each ECCE can comprise 8 EREG having and operate the same modulus value be associated with " mould 2 ".In other words, 1 steCCE (comprising EREG#0, EREG#2, EREG#4, EREG#6, EREG#8, EREG#10, EREG#12 and EREG#14) and 2 ndeCCE (comprising EREG#1, EREG#3, EREG#5, EREG#7, EREG#9, EREG#11, EREG#13 and EREG#15) can be configured in each PRB centering.As mentioned above, when the quantity of the EREG of an establishment ECCE is 8 (N=8), ECCE/EREG maps can to perform with the situation same way of N=4.And when N=8, the ECCE index in corresponding EPDCCH group can to perform with the situation same way of N=4.More specifically, ECCE index can from " 1 of minimum PRB centering steCCE " perform " 2 of maximum PRB centering ndeCCE ".That is, " 1 of minimum PRB centering steCCE " arrive " 2 of maximum PRB centering ndeCCE " can be indexed respectively as ECCE#0, ECCE#1 ..., ECCE# (2M-1).In this article, minimum PRB is to representing the PRB couple with minimum PRB index.Maximum PRB has the PRB couple of maximum PRB index to representing.
Figure 10 is the flow chart of the method (1000) for control information transmission in transmission/reception point illustrated according at least one embodiment.
With reference to Figure 10, transmission/reception point can by the Resource Block in subframe to the data area of (such as PRB to) to user device transmissions control information.In step S1010 place, the control channel unit (ECCE) (or can be called " distributing ECCE ") that transmission/reception point can configure (or formation) strengthens is for the transmission of control information.In this article, the Resource Unit (RE) of PRB centering can according to first frequently scheme (namely first frequency and then time mode) by reuse 16 numerals (such as, 0,1,2 ..., 15) index.The Resource Unit (RE) with same index can be included in the resource unit group (EREG) of same enhancing.Each ECCE can comprise the EREG corresponding with the EREG index with same modulus value.More specifically, step S1010 place configuration ECCE in each can be configured with (i) with when EREG index divided by 4 time there is same remainder (such as 0,1,2, or the EREG that EREG index 3) is corresponding, or (ii) with when EREG index divided by 2 time there is EREG corresponding to the EREG index of same remainder (such as 0 or 1).
The example distributing to the right index of PRB is described with reference to Fig. 3 to Fig. 8.With reference to Fig. 3 and Fig. 6, can according to first frequently scheme (namely first frequency and then time mode) by EREG from 0 numbering (namely indexing) to 15.In the embodiment illustrated in figure 3, index the cyclic shift based on symbol can be used to perform.More specifically, as shown in Figure 3, after being indexed be 11 (i.e. indexes 11) by the Resource Unit (RE) of " 300 " index in the first symbol, being indexed continuously by the contiguous RE of " 310 " index in the second symbol is 12 (i.e. indexes 12).Meanwhile, in embodiment shown in Figure 6, can perform when the cyclic shift not based on symbol and index.Therefore, in this case, as shown in Figure 6, after being indexed be 11 (i.e. indexes 11) by the Resource Unit (RE) of " 600 " index in the first symbol, successively being indexed by the contiguous RE of " 610 " index in the second symbol is 12 (i.e. indexes 12).
Transmission/reception point can use (i) with when EREG index divided by 4 time there is same remainder (such as 0,1,2, or the EREG that EREG index 3) is corresponding, or (ii) with when EREG index divided by 2 time there is EREG corresponding to the EREG index of same remainder (such as 0 or 1), configure at least one ECCE.
Such as, ECCE can be configured with when EREG index divided by 4 time there is EREG corresponding to the EREG index of same remainder (such as 0,1,2, or 3).More specifically, an ECCE can comprise EREG#0, EREG#4, EREG#8 and EREG#12.Another ECCE can comprise EREG#1, EREG#5, EREG#9 and EREG#13.Another ECCE can comprise EREG#2, EREG#6, EREG#10 and EREG#14.Other ECCE can comprise EREG#3, EREG#7, EREG#11 and EREG#15.And the EREG index-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, when ECCE be configured with when EREG index divided by 2 time there is the EREG index of same remainder (such as 0 or 1) corresponding EREG, an ECCE can comprise EREG#0, EREG#2, EREG#4, EREG#6, EREG#8, EREG#10 and EREG#12.Another ECCE can comprise EREG#1, EREG#3, EREG#5, EREG#7,8EREG#9, EREG#11 and EREG#13.And the EREG index-group corresponding with each ECCE can be expressed as { 0,2,4,6,8,10,12,14} or { 1,3,5,7,9,11,13,15}.
In step S1020 place, transmission/reception point can by least one in the ECCE of configuration to user device transmissions control information.
In this article, can by the EPDCCH control information transmission corresponding with the control channel limited in data area 220.EPDCCH can be assigned to Resource Block at least one ECCE in (such as PRB to).
The Resource Block carrying control information can for a PRB in EPDCCH group to (such as PRB to).In this article, EPDCCH group can comprise the group (namely comprising the PRB group of the PRB of M quantity) of " M " individual PRB.EPDCCH group can be according to EPDCCH transport-type centralized type or distributed-type.For both centralized type and distributed-type, M numerical value can be 2,4, or 8, and be not limited thereto.
The Resource Block carrying control information can set up a down link EPDCCH group to (such as one or more other PRB to) according to the scheme of centralized type together with one or more other Resource Block to (such as PRB to).That is, the Resource Block carrying control information to one or more other Resource Block to setting up a down link EPDCCH group according to the scheme of centralized type.
Figure 11 illustrates the flow chart for the method (1000) of receiving control information in a user device according to other embodiment.
With reference to Figure 11, subscriber equipment can by the Resource Block in subframe to the data area of (such as PRB to) from transmission/reception point receiving control information.More specifically, in step S1110 place, subscriber equipment can receive wireless signal (can be called " radio signal ") by least one ECCE.In this article, the Resource Unit (RE) of PRB centering can according to first frequently scheme (namely first frequency and then time mode) by reuse 16 numerals (such as, 0,1,2 ..., 15) index.The Resource Unit (RE) with same index can be included in the resource unit group (EREG) of same enhancing.Each at least one ECCE can comprise the EREG corresponding with the EREG index with same modulus value.More specifically, each at least one ECCE can be configured with (i) with when EREG index divided by 4 time there is same remainder (such as 0,1,2, or the EREG that EREG index 3) is corresponding, or (ii) with when EREG index divided by 2 time there is EREG corresponding to the EREG index of same remainder (such as 0 or 1).And in step S1120 place, subscriber equipment can obtain control information from the wireless signal received.
The example distributing to the right index of PRB is described with reference to Fig. 3 to Fig. 8.With reference to Fig. 3 and Fig. 6, can according to first frequently scheme (namely first frequency and then time mode) by EREG from 0 numbering (namely indexing) to 15.In the embodiment illustrated in figure 3, index the cyclic shift based on symbol can be used to perform.More specifically, as shown in Figure 3, after being indexed be 11 (i.e. indexes 11) by the Resource Unit (RE) of " 300 " index in the first symbol, successively being indexed by the contiguous RE of " 310 " index in the second symbol is 12 (i.e. indexes 12).Meanwhile, in embodiment shown in Figure 6, can perform when the cyclic shift not based on symbol and index.Therefore, in this case, as shown in Figure 6, after being indexed be 11 (i.e. indexes 11) by the Resource Unit (RE) of " 600 " index in the first symbol, successively being indexed by the contiguous RE of " 610 " index in the second symbol is 12 (i.e. indexes 12).In this article, by indexing be 12 RE (" 610 ") non-conterminous with the RE (" 600 ") by indexing being 11.
Transmission/reception point can use (i) with when EREG index divided by 4 time there is same remainder (such as 0,1,2, or the EREG that EREG index 3) is corresponding, or (ii) with when EREG index divided by 2 time there is EREG corresponding to the EREG index of same remainder (such as 0 or 1), set up ECCE.
Such as, ECCE can be configured with when EREG index divided by 4 time there is EREG corresponding to the EREG index of same remainder.More specifically, an ECCE can comprise EREG#0, EREG#4, EREG#8 and EREG#12.Another ECCE can comprise EREG#1, EREG#5, EREG#9 and EREG#13.Another ECCE can comprise EREG#2, EREG#6, EREG#10 and EREG#14.Other ECCE can comprise EREG#3, EREG#7, EREG#11 and EREG#15.And the EREG index-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, when ECCE be configured with when EREG index divided by 2 time there is the EREG index of same remainder corresponding EREG, an ECCE can comprise EREG#0, EREG#2, EREG#4, EREG#6, EREG#8, EREG#10, EREG#12 and EREG#14.Another ECCE can comprise EREG#1, EREG#3, EREG#5, EREG#7, EREG#9, EREG#11 and EREG#13.And the EREG index-group corresponding with each ECCE can be expressed as { 0,2,4,6,8,10,12,14} or { 1,3,5,7,9,11,13,15}.
Figure 12 is the schematic diagram of the transmission/reception point illustrated according to some embodiments.
With reference to Figure 12, according to the transmission/reception point 1200 of the present embodiment can by the Resource Block in subframe to (such as PRB to) to user device transmissions control information.Transmission/reception point 1200 according to the present embodiment can comprise control processor 1210, transmitter 1220 and receiver 1230.
Control processor 1210 can configure (or formed) ECCE, for the transmission of control information.More specifically, the Resource Unit (RE) of PRB centering can according to first frequently index scheme (namely first frequency and then time mode) by reuse 16 numerals (such as, 0,1,2 ..., 15) index.The Resource Unit (RE) with same index can be included in the resource unit group (EREG) of same enhancing.Each ECCE can comprise the EREG corresponding with the EREG index with same modulus value.In more detail, each in ECCE can be configured with (i) with when EREG index divided by 4 time there is same remainder (such as 0,1,2, or the EREG that EREG index 3) is corresponding, or (ii) with when EREG index divided by 2 time there is EREG corresponding to the EREG index of same remainder (such as 0 or 1).
In this article, Resource Block can set up a down link EPDCCH group to (such as one or more other PRB to) according to the scheme of centralized type together with one or more other Resource Block to (such as PRB to).Namely Resource Block to one or more other Resource Block to setting up a down link EPDCCH group according to the scheme of centralized type.And, with each the corresponding EREG index (i.e. EREG index-group) in the ECCE of configuration can be 0,4,8,12}, and 1,5,9,13}, 2,6,10,14}, and { one in 3,7,11,15}.Alternatively, with configuration ECCE in each corresponding EREG index-group can be 0,2,4,6,8,10,12,14} with { one in 1,3,5,7,9,11,13,15}.
In addition, control processor 1210 can carry out the operation of controls transfer/acceptance point 1200 according to the method for the ECCE/EREG mapping for performing EPDCCH transmission and/or the method for indexing for performing ECCE in specific centralized EPDCCH group.
Transmitter 1220 can by least one in the ECCE of configuration to user device transmissions control information.
Transmitter 1220 and receiver 1230 can transmit respectively in conjunction with subscriber equipment and receive signal, message and/or the data for performing above-mentioned the present embodiment.
Figure 13 is the schematic diagram of the subscriber equipment illustrated according to some embodiments.
With reference to Figure 13, according to the subscriber equipment 1300 of the present embodiment can by the Resource Block in subframe to (such as PRB to) from transmission/reception point (such as transmission/reception point 1200) receiving control information.Receiver 1310, control processor 1320 and transmitter 1330 can be comprised according to the subscriber equipment 1300 of the present embodiment.
Receiver 1320 can receive wireless signal by least one ECCE.In this article, the Resource Unit (RE) of PRB centering can according to first frequently index scheme (namely first frequency and then time mode) by reuse 16 numerals (such as, 0,1,2 ..., 15) index.The Resource Unit (RE) with same index can be included in the resource unit group (EREG) of same enhancing.Each at least one ECCE can comprise the EREG corresponding with the EREG index with same modulus value.In this case, each at least one ECCE can be configured with (i) with when EREG index divided by 4 time there is same remainder (such as 0,1,2, or the EREG that EREG index 3) is corresponding, or (ii) with when EREG index divided by 2 time EREG corresponding to the EREG index with same remainder (such as 0 or 1).
In this article, Resource Block can set up a down link EPDCCH group to (such as one or more other PRB to) according to the scheme of centralized type together with one or more other Resource Block to (such as PRB to).Namely Resource Block to one or more other Resource Block to setting up a down link EPDCCH group according to the scheme of centralized type.And the EREG index (i.e. EREG index-group) corresponding with each at least one ECCE can be { 0,4,8,12}, { 1,5,9,13}, { 2,6,10,14}, and { in 3,7,11,15}.Alternatively, corresponding with each at least one ECCE EREG index-group can be { 0,2,4,6,8,10,12,14} and { one in 1,3,5,7,9,11,13,15}.
Control processor 1320 can obtain control information from the wireless signal received.And control processor 1820 can control the operation (i.e. the operation of subscriber equipment 1800) needed for performing above-described embodiment.More specifically, control processor 1320 can according in specific centralized EPDCCH group, to receive for EPDCCH and/or the ECCE/EREG of ECCE index maps and controls the operation of subscriber equipment 1300.
Receiver 1310 and transmitter 130 can transmit respectively in conjunction with transmission/reception point and receive signal, message and/or the data for performing above-mentioned the present embodiment.
Although eliminate the content of the technical standard related in above-described embodiment in order to the concise and to the point description of this specification, the related content of technical standard can form the part of this specification.Therefore, increase the content relevant with standard will be interpreted as comprising within the scope of this invention in specification and/or claim.
More specifically, below, attached document can form a part for this explanation as a part for open source literature.Therefore, will be interpreted as comprising within the scope of this invention in the increase content relevant with standard and/or normative document to specification and/or claim.
As mentioned above, because technological thought of the present invention is described by exemplary embodiment, so various forms of replacement, amendment and change can be made according to foregoing description by those skilled in the art when not departing from essential characteristic of the present invention.Therefore, embodiment disclosed in the present invention is intended to technological thought of the present invention is shown, and scope of the present invention is not limited to embodiment.Scope of the present invention should belong to this mode of the present invention and makes an explanation on the basis of appended claims to be equal to all technological thoughts comprised within the scope of claim.
the cross reference of related application
The application requires according to 35 U.S.C. § 119 (on September 14th, 2012 submit to) korean patent application No.10-2012-0102452, (on October 8th, 2012 submit to) korean patent application No.10-2012-0111501 and (on December 12nd, 2012 submit to) korean patent application No.10-2012-0144531, by reference its full content is incorporated herein.

Claims (20)

1. in transmission/reception point by the method for the right data area of the Physical Resource Block (PRB) in subframe to user device transmissions control information, described method comprises:
Form the control channel unit (ECCE) strengthened, wherein, i the Resource Unit (RE) of () PRB centering is indexed by reusing 16 numerals according to first scheme frequently, (ii) Resource Unit (RE) with same index is included in the resource unit group (EREG) of same enhancing, and each (iii) in ECCE comprises the EREG corresponding with following EREG index, when this EREG index is divided by having same remainder during N, wherein, N is in 4 and 2; And
By at least one in ECCE to user device transmissions control information.
2. method according to claim 1, wherein, PRB to together with at least one other PRB to for configure according to the scheme of centralized type one strengthen physical downlink control channel (EPDCCH) group.
3. method according to claim 2, wherein, is indexed to the right N-th ECCE of the maximum PRB of EPDCCH group by ECCE from the ECCE that the minimum PRB of EPDCCH group is right.
4. method according to claim 1, wherein, the EREG index-group corresponding with each in ECCE is chosen as { n| (n mod 4)=0}, { n| (n mod 4)=1}, { n| (n mod 4)=2} and { one in n| (nmod 4)=3}, wherein, n is EREG index.
5. method according to claim 1, wherein, the EREG index-group corresponding with each in ECCE is chosen as, and { n| (n mod 2)=0} is with { one in n| (n mod 2)=1}, wherein, n is EREG index.
6., in a user device by the method for the right data area of the Physical Resource Block (PRB) in subframe from transmission/reception point receiving control information, described method comprises:
The control channel unit (ECCE) strengthened by least one receives wireless signal, wherein, i the Resource Unit (RE) of () PRB centering is indexed by reusing 16 numerals according to first scheme frequently, (ii) Resource Unit (RE) with same index is included in the resource unit group (EREG) of same enhancing, and each (iii) in ECCE comprises the EREG corresponding with following EREG index, when this EREG index is divided by having same remainder during N, wherein, N is in 4 and 2; And
Control information is obtained from the wireless signal received.
7. method according to claim 6, wherein, PRB to together with at least one other PRB to for configure according to the scheme of centralized type one strengthen physical downlink control channel (EPDCCH) group.
8. method according to claim 7, wherein, is indexed to the right N-th ECCE of the maximum PRB of EPDCCH group by ECCE from the ECCE that the minimum PRB of EPDCCH group is right.
9. method according to claim 6, wherein, the EREG index-group corresponding with each in ECCE is chosen as { n| (n mod 4)=0}, { n| (n mod 4)=1}, { n| (n mod 4)=2} and { one in n| (nmod 4)=3}, wherein, n is EREG index.
10. method according to claim 6, wherein, the EREG index-group corresponding with each in ECCE is chosen as, and { n| (n mod 2)=0} is with { one in n| (n mod 2)=1}, wherein, n is EREG index.
11. 1 kinds for by the transmission/reception point of the right data area of the Physical Resource Block (PRB) in subframe to user device transmissions control information, described transmission/reception point comprises:
Control processor, it is configured to form the control channel unit (ECCE) strengthened, wherein, i the Resource Unit (RE) of () PRB centering is indexed by reusing 16 numerals according to first scheme frequently, (ii) Resource Unit (RE) with same index is included in the resource unit group (EREG) of same enhancing, and each (iii) in ECCE comprises the EREG corresponding with following EREG index, when this EREG index is divided by having same remainder during N, wherein, N is in 4 and 2; And
Transmitter, it is configured to by least one in ECCE to user device transmissions control information.
12. transmission/reception points according to claim 11, wherein, PRB to together with at least one other PRB to for configure according to the scheme of centralized type one strengthen physical downlink control channel (EPDCCH) group.
13. transmission/reception points according to claim 12, wherein, are indexed to the right N-th ECCE of the maximum PRB of EPDCCH group by ECCE from the ECCE that the minimum PRB of EPDCCH group is right.
14. transmission/reception points according to claim 11, wherein, the EREG index-group corresponding with each in ECCE is chosen as { n| (n mod 4)=0}, { n| (n mod 4)=1}, { n| (n mod 4)=2} and { one in n| (n mod 4)=3}, wherein, n is EREG index.
15. transmission/reception points according to claim 9, wherein, the EREG index-group corresponding with each in ECCE is chosen as, and { n| (n mod 2)=0} is with { one in n| (n mod 2)=1}, wherein, n is EREG index.
16. 1 kinds for by the subscriber equipment of the right data area of the Physical Resource Block (PRB) in subframe from transmission/reception point receiving control information, described subscriber equipment comprises:
Receiver, its control channel unit (ECCE) being configured to be strengthened by least one receives wireless signal, wherein, i the Resource Unit (RE) of () PRB centering is indexed by reusing 16 numerals according to first scheme frequently, (ii) Resource Unit (RE) with same index is included in the resource unit group (EREG) of same enhancing, and each (iii) in ECCE comprises the EREG corresponding with following EREG index, when this EREG index is divided by having same remainder during N, wherein, N is in 4 and 2; And
Control processor, it is configured to obtain control information from the wireless signal received.
17. subscriber equipmenies according to claim 16, wherein, PRB to together with at least one other PRB to for configure according to the scheme of centralized type one strengthen physical downlink control channel (EPDCCH) group.
18. subscriber equipmenies according to claim 17, wherein, are indexed to the right N-th ECCE of the maximum PRB of EPDCCH group by ECCE from the ECCE that the minimum PRB of EPDCCH group is right.
19. subscriber equipmenies according to claim 16, wherein, the EREG index-group corresponding with each in ECCE is chosen as { n| (n mod 4)=0}, { n| (n mod 4)=1}, { n| (n mod 4)=2} and { one in n| (n mod 4)=3}, wherein, n is EREG index.
20. subscriber equipmenies according to claim 16, wherein, the EREG index-group corresponding with each in ECCE is chosen as, and { n| (n mod 2)=0} is with { one in n| (n mod 2)=1}, wherein, n is EREG index.
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KR1020120144531A KR101574713B1 (en) 2012-09-14 2012-12-12 Method for transmitting control information, transmission/reception point thereof, method for receiving control information and terminal thereof
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