CN104718715A - Transmission and reception of control information - Google Patents

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 user terminal place receiving control information.Especially, the disclosure relates to the method and apparatus (such as transmission/reception point) for the user device transmissions control information to the downlink control channel receiving downlink control information by employing up-to-date 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 the downlink control channel being arranged in data area with communicating downlink control information.

Meanwhile, typical control channel unit (CCE) is associated with the distribution of downlink control channel in control area.Strengthen control channel unit (ECCE) by up-to-date restriction for allocation of downlink control channel in the data area.Therefore, the Resource Allocation Formula be associated with the ECCE of up-to-date restriction may be needed.

Summary of the invention

To the solution of problem

The present embodiment is resource unit group (EREG) mapping method of control channel unit (the ECCE)/enhancing providing a kind of enhancing for downlink control channel transmission in the data area.And the present embodiment is to provide a kind of for performing the method and apparatus that ECCE indexs in distributed " physical downlink control channel of enhancing " (EPDCCH) 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 of two or more in subframe (PRB) to user device transmissions control information.Described method can comprise: form the control channel unit (ECCE) strengthened, wherein, i the Resource Unit (RE) in each of () two or more 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, (iii) each in ECCE comprise from when different EREG index is divided by corresponding 4 or 8 EREG of different EREG indexes during one in 4 and 2 with same remainder, and each EREG comprised (iv) in ECCE is positioned at two or more PRB centering, 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 of two or more in subframe (PRB) from transmission/reception point receiving control information.Described method can comprise: the control channel unit (ECCE) strengthened by least one receives wireless signal, wherein, i the Resource Unit (RE) in each of () two or more 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, (iii) each in ECCE comprise from when different EREG index is divided by corresponding 4 or 8 EREG of different EREG indexes during one in 4 and 2 with same remainder, and each EREG comprised (iv) in ECCE is positioned at two or more PRB centering, 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 of two or more in subframe (PRB) to user device transmissions control information.Described transmission/reception point comprises control processor and transmitter.Described control processor can be configured to form the control channel unit (ECCE) strengthened.Here, i the Resource Unit (RE) in each of () two or more 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, (iii) each in ECCE comprise from when different EREG index is divided by corresponding 4 or 8 EREG of different EREG indexes during one in 4 and 2 with same remainder, and each EREG comprised (iv) in ECCE is positioned at two or more PRB centering.Described 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 of two or more in subframe (PRB) from transmission/reception point receiving control information.Described subscriber equipment can comprise receiver and control processor.The control channel unit (ECCE) that described receiver can be configured to be strengthened by least one receives wireless signal, wherein, i the Resource Unit (RE) in each of () two or more 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, (iii) each in ECCE comprise from when different EREG index is divided by corresponding 4 or 8 EREG of different EREG indexes during one in 4 and 2 with same remainder, and each EREG comprised (iv) in ECCE is positioned at two or more PRB centering.Described 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;

Fig. 2 shows a Resource Block pair when standard cyclic prefix (standard C P), as the example of the structure of the down-chain resource in Long Term Evolution (LTE) or senior LTE (LTE-A) system;

Fig. 3 illustrates the EPDCCH transmission comprising two types that centralized EPDCCH transmits and distributed EPDCCH transmits;

Fig. 4 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. 5 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 PRB that indexs is right according to EREG;

Fig. 6 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. 7 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. 8 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. 9 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;

Figure 10 shows the ECCE configuration be configured with in the distributed EPDCCH group of 2 ERRB according to embodiment 1;

Figure 11 shows and configures according to the ECCE in the distributed EPDCCH group being configured with 8 EPRB of embodiment 1;

Figure 12 illustrates according to the ECCE configuration in the distributed EPDCCH group of embodiment 2-1;

Figure 13 illustrates according to the ECCE configuration in the distributed EPDCCH group of embodiment 2-2;

Figure 14 illustrates according to the ECCE configuration in the distributed EPDCCH group of embodiment 2-3;

Figure 15 illustrates the flow chart for the method for control information transmission in transmission/reception point according at least one embodiment;

Figure 16 illustrates the flow chart for the method for receiving control information in a user device according to other embodiment;

Figure 17 is the schematic diagram of the transmission/reception point illustrated according to some embodiments; And

Figure 18 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 identical element is illustrated identical element 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 are used for realizing 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 realizing 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, transfer point/acceptance 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 data 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.

In order to perform the EPDCCH resource mapping for special user equipment, can in EPDCCH, adopt or limit the enhancing REG (EREG) corresponding with REG or CCE of typical PDCCH or strengthen CCE (ECCE).

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 limit 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, difference " M " numerical value can be had for each in multiple EPDCCH groups that given subscriber equipment is determined.

And each EPDCCH group can be confirmed as one in distributed (distributed) type and centralized (localized) type, and sends signal according to the type determined.

EPDCCH group can be corresponding with centralized type or distributed-type according to EPDCCH transport-type.For centralized type, above-mentioned " M " can be 1 or 2 ⁿ(n=1,2,3,4 or 5) and be not limited thereto.Meanwhile, for distributed-type, " M " can be 2,4,8 or 16 and be not limited thereto.

Fig. 3 illustrates the EPDCCH transmission comprising two types that centralized EPDCCH transmits and distributed EPDCCH transmits.

The quantity of downlink physical resource block (PRB) can be called N _pRB.Here, down link PRB can set up the system bandwidth supported in the specific cell configured by communication providers.EPDCCH can be transmitted by corresponding PDSCH region.In this case, the transport-type of EPDCCH can transmit with centralized EPDCCH and distributed EPDCCH transmit in one corresponding, as shown in Figure 3 a and Figure 3 b shows.Therefore, the quantity of the Resource Unit (RE) of ECCE structure and an establishment ECCE can be different according to each EPDCCH transport-type.Alternatively, the quantity of ECCE structure and the Resource Unit (RE) of each ECCE can without concerning EPDCCH transport-type but identical.

Centralized EPDCCH transmission as shown in Figure 3 a can illustrate an ECCE at a Resource Block to being placed in (such as a PRB to) and transmitting.Distributed EPDCCH transmission as shown in Figure 3 b can illustrate an ECCE at least two Resource Block to being placed in (such as two PRB to) and transmitting.

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 a user equipment allocation K _lthe centralized EPDCCH group of individual quantity and K _dthe distributed EPDCCH group of individual quantity.I.e. K _land K _dsummation can be " K " (K _l+ K _d=K).

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, and without concerning (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 certain 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 corresponding Resource Unit (RE) 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 certain EPDCCH group is described with reference to Fig. 4 to Fig. 9.In Fig. 4 to Fig. 9, 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. 4 show to use the cyclic shift based on symbol to index the Physical Resource Block (PRB) of procedure index according to EREG when a transmit antenna port (such as CRS port 0) right Resource Unit (RE) maps.

With reference to Fig. 4, 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 4, the cyclic shift based on symbol can be used to perform to index.More specifically, as shown in Figure 4, after the Resource Unit (RE) pointed out by " 400 " 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 " 410 " in the second symbol is successively indexed.In the same manner, after the Resource Unit (RE) pointed out by " 420 " 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 " 430 " in the 3rd symbol is successively indexed.

Physical Resource Block (PRB) shown in Fig. 4 is to being associated with CRS port 0.As shown in Figure 4, 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. 5 show to use the cyclic shift based on symbol to index the Physical Resource Block (PRB) of procedure index according to EREG when two transmit antenna ports (such as CRS port 0 and 1) right Resource Unit (RE) maps.Fig. 6 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 in the same manner as in figure 4 to index the Resource Unit (RE) shown in Fig. 5 and Fig. 6." 8 extra RE " and " RE for the CRS shown in Fig. 4 " can be mapped to for CRS port 0 and 1 at Fig. 5, CRS.In figure 6, 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. 5 ".

When each OFDM symbol execution EREG indexs, Fig. 4 to Fig. 6 illustrates the embodiment that cyclic shift is applied to, and Fig. 7 to Fig. 9 illustrates the embodiment that cyclic shift is not applied to.

Fig. 7 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. 8 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. 9 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. 7 to Fig. 9, the mapping of CRS can be performed in the mode identical with Fig. 4 to Fig. 6.But the scheme of indexing used can be different.

Typically, with reference to Fig. 7, 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 7, execution can index when the cyclic shift not based on symbol.More specifically, as shown in Figure 7, after the Resource Unit (RE) pointed out by " 700 " in the first symbol is indexed and is 11 (i.e. indexes 11), the RE pointed out by " 710 " in the second symbol index that continued is 12 (i.e. indexes 12).Here, index be 12 RE (" 710 ") (namely corresponding with next one RE (" 710 ")) not with index be 11 RE (" 700 ") adjacent.In the same manner, after the RE pointed out by " 720 " in the second symbol is indexed and is 7 (i.e. indexes 7), the RE pointed out by " 730 " in the 3rd symbol is 8 (i.e. indexes 8) by successively index.Here, index be 8 RE (" 730 ") (namely corresponding with next one RE (" 730 ")) not adjacent with the RE (" 720 ") by indexing being 7.

In Fig. 4 to Fig. 9, 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. 4 to Fig. 9 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. 4 to Fig. 9, 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. 4 to Fig. 9, 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. 4, the total quantity of the RE corresponding with index #0 is 9.But, when the region be associated with " first 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, what be indexed as the RE of #1 adds up to 9.In this case, the RE (RE such as, pointed out by " 440 " in Fig. 4) 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 elementary cell 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 " the first two, three or four OFDM symbol " 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. 4 to Fig. 9, 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 may 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 distributed EPDCCH group (i.e. the EPDCCH group of distributed-type).

When distributed EPDCCH transmits, in order to maximize frequency diversity gain, the EREG setting up an ECCE can be configured to the PRB couple being distributed to M the quantity that corresponding EPDCCH group comprises.In view of this situation, the present embodiment can provide a kind of for performing the method that ECCE/EREG maps in distributed EPDCCH group.

More specifically, the present embodiment can provide a kind of method of each ECCE of the PRB centering for configuring M the quantity forming above-mentioned distributed EPDCCH group.Particularly, the present embodiment can consider old PDCCH and CRS of the transmission 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.

With reference to Fig. 4 to Fig. 9, the EREG that configures a PRB centering (such as EREG#0, EREG#1 ..., EREG#15) in each can comprise 9 RE.But as shown in Fig. 4 to Fig. 9, the quantity of the useful RE of every EREG can be determined based on the size of the quantity of CRS port and old PDCCH control area.Here, available RE can represent the RE that can be used for EPDCCH transmission.When EPDCCH set configures according to old PDCCH control area size and the CRS port arrangement corresponding with standard down link subframe as shown in Figure 4, table 1 below and table 3 can represent that EPDCCH gathers the quantity of the available RE of every EREG index of the PRB centering comprised.

[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

When old PDCCH control area is of a size of " 1 " individual OFDM symbol, table 1 above can represent according to each CRS port arrangement, every EREG, the quantity of available resource units (RE).Here, the EREG index that table 1 is not above applied to based on cyclic shift creates.

[table 2]

	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 control area is of a size of " 2 " individual OFDM symbol, table 2 above can represent according to each CRS port arrangement, every EREG, the quantity of available resource units (RE).Here, the EREG index that table 2 is not above applied to based on cyclic shift creates.

[table 3]

	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 control area is of a size of " 3 " individual OFDM symbol, table 3 above can represent according to each CRS port arrangement, every EREG, the quantity of available resource units (RE).Here, the EREG index that table 3 is not above applied to based on cyclic shift creates.

With reference to table 1 to table 3, known every EREG, the quantity of the RE that can be used for EPDCCH transmission can be different.For this reason, the quantity of the available RE of every EREG can be different according to the scheme for ECCE distribution EREG.

In view of this situation, the present embodiment can provide ECCE/EREG mapping method in distributed EPDCCH group.

When the PRB that specific EPDCCH group comprises M quantity is right, in order to the PRB corresponding with the unit of typical (or existing) PDSCH transmission distinguishes, PRB related to the present embodiment is to being called " Physical Resource Block (EPRB) of enhancing ".EPRB index can be expressed as EPRB#m.More specifically, the EPRB of M quantity can be numbered (namely indexing) to EPRB# (M-1) with the incremental order setting up the right index (i.e. PRB index) of PRB of EPDCCH set from EPRB#0.In other words, can perform successively to comprise and from minimum PRB, the EPRB right to maximum PRB is indexed.Here, minimum PRB is to can for having the PRB couple of minimum PRB index, and maximum PRB is to can for having the PRB couple of maximum PRB index.

embodiment 1

When distributed EPDCCH transmits, embodiment 1 can be provided for the method maximizing the frequency diversity gain corresponding with important performance index.More specifically, in embodiment 1, when distributed EPDCCH set comprises the EPRB of M quantity, each establishment in the ECCE of distributed EPDCCH set can configure according to the distributed EPRB of the condition of two below by N number of quantity.

When " condition 1-1 " (i.e. N>=M), each ECCE can be mapped to the EREG's of every EPRB quantity, and can by add up to M quantity EPRB (i.e. EPRB#m, for m=0,1,2 ..., M-1) and be mapped to the EREG of N number of quantity.Here, each ECCE can comprise the EREG of N number of quantity.

When " condition 1-2 " (i.e. N<M), each ECCE can be mapped to every EPPRB EREG.Therefore, each ECCE can by ading up to the distributed EPRB of N number of quantity and being mapped to the EPRG of the correspondence of N number of quantity.Here, each ECCE can comprise the EREG of N number of quantity.The EPRB of the correspondence of N number of quantity can with define corresponding EPDCCH group M quantity EPRB in, have the EPRB of N number of quantity at the interval of individual EPRB is corresponding.

Such as, two PRB can be assigned in the standard down link subframe with standard cyclic prefix (CP) (M=2) is " EPDCCH subscriber equipment " configuring distributed EPDCCH group.Here, EPDCCH subscriber equipment represents that EPDCCH gathers the subscriber equipment be applied to.In this case (namely when M=2), two PRBs defining corresponding EPDCCH group right index program can successively be performed from minimum PRB to the PRB of minimum PRB index (namely have to) with the incremental order of the PRB index of correspondence.Therefore, two PRB are to being indexed as EPRB#0 and EPRB#1 respectively.In this case, the quantity forming the EREG of an ECCE in the standard down link subframe with standard C P can be 4 (N=4).Therefore, each ECCE can use 4 EREG to configure according to above-mentioned condition 1-1, and these 4 EREG comprise 2 (=4/2) individual EREG that (i) distribute in EPRB#0 and 2 EREG that (ii) distributes in EPRB#1.

Figure 10 shows the ECCE configuration be configured with in the distributed EPDCCH group of 2 EREG according to embodiment 1.

With reference to Figure 10, distributed EPDCCH group can comprise 2 PRB couple, such as EPRB#0 and EPRB#1.Each ECCE can use 4 EREG to configure according to above-mentioned condition 1-1, and these 4 EREG comprise 2 EREG that (i) distribute in EPRB#0 and 2 EREG that (ii) distributes in EPRB#1.

In other embodiments, 8 PRB can be assigned in the standard down link subframe with standard C P (M=8) is the distributed EPDCCH group of EPDCCH user device configuration.Here, EPDCCH subscriber equipment represents the subscriber equipment that EPDCCH is applied to.In this case (namely when M=8), 8 PRBs defining corresponding EPDCCH group right index program can successively be performed from minimum PRB to the PRB of minimum PRB index (namely have to) with the incremental order of the PRB index of correspondence.Therefore, 8 PRB to being indexed as EPRB#0 respectively, EPRB#1 ..., EPRB#7.Even in this case, the quantity setting up the EREG of an ECCE in the standard down link subframe with standard C P can be 4 (N=4).Therefore, each ECCE can configure by selecting an EREG of each distributed EPRB.Here, distributed EPRB can with have the EPRB of N (N=4) individual quantity at interval of EPRB corresponding.In other words, 4 EREG can be mapped, for the ECCE that transmission is corresponding.More specifically, an ECCE can use 4 EREG to configure, these 4 EREG comprise the EREG that (i) selects from EPRB#0, (ii) EREG selected from EPRB#2, (iii) EREG selected from EPRB#4, and the EREG that (iv) selects from EPRB#6.Alternatively, an ECCE can use 4 EREG to configure, these 4 EREG comprise the EREG that (i) selects from EPRB#1, (ii) EREG selected from EPRB#3, (iii) EREG selected from EPRB#5, and the EREG that (iv) selects from EPRB#7.

Figure 11 shows and configures according to the ECCE in the distributed EPDCCH group being configured with 8 EPRB of embodiment 1.

With reference to Figure 11, distributed EPDCCH group can comprise 8 PRB couple with EPRB#0 to EPRB#7.As shown in figure 11, an ECCE can configure by distributing an EREG for each in EPRB#0, EPRB#2, EPRB#4 and EPRB#4 according to condition 1-2 above.

embodiment 2

Be defined together with the EPRB mapping method described in embodiment 1 above to configure ECCE, EREG system of selection (selecting the method for EREG (or multiple EPRB) in namely for the EPRB in correspondence) in distributed EPDCCH group.Here, the combination of " EREG system of selection " and " the EPRB skip philosophy of embodiment 1 " is used to provide ECCE/EREG mapping method according to the embodiment of three below.

embodiment 2-1

As the first embodiment, corresponding ECCE can use " EREG with same index " to configure, and this EREG is selected from each EPRB being mapped as a configuration ECCE according to embodiment 1.More specifically, in order to configure an ECCE, when condition 1-1, can map every EPRB's the EREG of individual quantity.Meanwhile, when condition 1-2, an EREG of every EPRB can be mapped.In these cases, each ECCE can configure by mapping " having the EREG of same index " in each EPRB.The order of the minimum EREG index that can be associated with (i) and each ECCE and (ii) EPRB index is to defining ading up to of corresponding EPDCCH group the ECCE of individual quantity (such as ECCE#i, ) index.In other words, when ECCE according to the EPRB of embodiment 1 above map configure, ECCE can be performed successively from the ECCE be associated with the minimum EREG (namely there is the EREG of minimum EREG index) selected in the EREG of self-corresponding EPRB (EPRB namely determined according to embodiment 1 when each ECCE) and index.That is, can be numbered successively (namely indexing) from the ECCE of ECCE#0 to correspondence.And, when the different EPRB that each ECCE is mapped to N number of quantity are as described in the condition 1-2 above being associated with and the EREG index being selected from the EPRB of the ECCE defining each correspondence is identical between ECCE, ECCE indexs and can start from being mapped to the ECCE of minimum EPRB index.The EREG forming ECCE#i in the EPDCCH group of correspondence can determine according to formula 1 below and formula 2.

[formula 1]

For $i=\mathrm{0,1},...,\frac{16}{N}\&times;M-1,$ And N >=M,

The EREG#n} of ECCE#i={EPRB#m

In equation 1, m=0,1 ..., M-1, and here, $n\left(i\right)=i\&times;\frac{N}{M}.$

[formula 2]

For $i=\mathrm{0,1},...,\frac{16}{N}\&times;M-1,$ And N < M,

The EREG#n (i) of ECCE#i={EPRB#m (a) }

In formula 2, wherein, a=0,1 ..., N-1, and here, [x] represents the maximum integer being no more than x.

Figure 12 illustrates according to the ECCE configuration in the distributed EPDCCH group of embodiment 2-1.

In fig. 12, the quantity (" N ") setting up the EREG of ECCE can be " 4 " (N=4), and " i " (i.e. ECCE index #i) corresponding with ECCE index can be " 0 " (i=0).

Figure 12 a illustrates the ECCE configuration according to formula 1 above.With reference to Figure 12 a, the quantity (" M ") setting up the EPRB of EPDCCH group can be " 2 " (M=2).If the numerical value of this variable (such as N=4, i=0, and M=2) is applied to formula 1, then $n\left(i\right)=i\&times;\frac{N}{M}-0\&times;\frac{4}{2}=0$ And $n\left(i\right)+\frac{N}{M}-1=1.$ Therefore, ECCE#0 can be { EREG#0 and EREG#1} of EPRB#0 and EPRB#1.In other words, as figure 12 a shows, ECCE#0 (i) can be used to be selected from ERGE#0 and EREG#1 that ERGE#0 and EREG#1 of EPRB#0 and (ii) be selected from EPRB#1 configures.

Figure 12 (b) illustrates the ECCE configuration according to formula 2 above.With reference to Figure 12 b, the quantity (" M ") setting up the EPRB of EPDCCH group can be " 8 " (M=8).If the numerical value of this variable (such as N=4, i=0, and M=8) is applied to formula 2, then and $m\left(a\right)=\frac{M}{N}a+\left(i\mathrm{mod}\frac{M}{N}\right)=\frac{8}{4}\&times;a+\left(0\mathrm{mod}\frac{8}{4}\right)=2a+0=2a.$ For a=0,1,2,3, m (a)={ 0,2,4,6}.Therefore, ECCE#0 can be { the EREG#0} of EPRB#0, EPRB#2, EPRB#4 and EPRB#6.In other words, as shown in Figure 12b, ECCE#0 can use (i) to be selected from the ERGE#0 of EPRB#0, and (ii) is selected from the ERGE#0 of EPRB#2, and (iii) is selected from the EREG#0 that the EREG#0 of EPRB#4 and (iv) be selected from EPRB#6 and configures.

embodiment 2-2

In another embodiment, corresponding ECCE can use, and " having the EREG of displacement index " configures, and this EREG is selected from each EPRB being mapped as a configuration ECCE according to embodiment 1.According to embodiment 1, the jump size of the EPRB index that the EREG setting up specific ECCE is selected from can correspond to (i) EPRB (when superincumbent condition 1-1) or (ii) the EPRB (only when superincumbent condition 1-2) of individual quantity.

Hereinafter, will in conjunction with above describe (size of such as jumping) specifically describe the present embodiment.When distributed EPDCCH group is made up of the EPRB (such as EPRB#0 to EPRB# (M-1)) of M quantity, EPRB that (namely determining) select for EREG (that is, EREG be selected from EPRB) can be mapped by EPRB jump program in the EPRB of M quantity.Here, EPRB jump program can start from the EREG#0 of EPRB#0 and can have the jump size of the condition according to embodiment 1 above.EREG for the configuration of ECCE can select an EREG (namely by selecting an EREG from each EPRB mapped by EPRB jump program) to determine by the EPRB often mapped.Particularly, in this case, no matter when perform EPRB and jump (with reference to Fig. 9 b), select the EREG index of self-corresponding EPRB can increase " 1 ".If mapping the N for configuring specific ECCE ^tharrive the last EPRB (namely maximum EPRB) defining corresponding EPDCCH group before EREG, then can successively perform EREG mapping by applying the cyclic shift again turning back to an EPRB (namely minimum EPRB).

In other words, on basis, the jump of embodiment 1 is of a size of " 1 ", namely when N >=M (such as N=4 and M=3), 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 again turning back to EPRB#0, EREG#3 can be selected from EPRB#0.Therefore, can be selected by the EPRB ading up to M quantity and map the EREG of N number of quantity.Particularly, when N>M, once or repeatedly can select EPRB (or multiple EPRB).

When for selecting an ECCE/EREG of the EREG of N number of quantity to map as mentioned above, the 2nd ECCE/EREG can be performed from next EPRB and mapping.More specifically, the 2nd ECCE can be mapped by jump program and EREG option program of EPRB.Here, EPRB jump program can start from the EREG#0 of EPRB#1 and have identical jump size (namely for the jump size of an ECCE/EREG mapping).EPRB for the mapping of the 2nd ECCE can be determined by the EPRB program of jumping.The EREG ading up to N number of quantity for the configuration of the 2nd ECCE can select an EREG to determine (namely selecting) by each EPRB determined.Particularly, in this case, no matter when perform EPRB and jump, the EREG index being selected from " corresponding EPRB " (namely by each EPRB that EPRB jump program is determined) can increase " 1 ".In the same manner, for M ^ththe EREG of the configuration of ECCE (i.e. ECCE# (M-1)) maps the EREG#0 that can start from EPRB# (M-1).Here, EPRB# (M-1) the last EPRB that can comprise with corresponding EPDCCH group is corresponding.

When the first round, (ECCE/EREG namely for the configuration of ECCE#0 to ECCE# (M-1) maps) completed as mentioned above, each EREG comprised (such as EREG#0 to EREG# (N-1)) formed in all EPRB (such as EPRB#0 to EPRB# (M-1)) of corresponding EPDCCH group may be used for the mapping of ECCE#0 to ECCE# (M-1).After this, in the same manner, second the EREG#N that (ECCE/EREG namely for the configuration of ECCE#M to ECCE# (2M-1) maps) can start from EPRB#0 is taken turns.Therefore, can take turns by second and map ECCE#M to ECCE# (2M-1).

When what to perform according to N numerical value in the above described manner during wheel, can map and form ading up to of corresponding EPDCCH group the ECCE of individual quantity.

ECCE/EREG mapping method according to the configuration for distributed EPDCCH group of embodiment 2-2 can be expressed by formula 3 below and formula 4.

[formula 3]

For $i=\mathrm{0,1},...,\frac{16}{N}\&times;M-1,$ And N >=M,

The EREG#n (a) of ECCE#i={EPRB#m (a) }

In equation 3, for a=0,1 ..., N-1, and and here, [x] represents the maximum integer being no more than x.。

[formula 4]

For $i=\mathrm{0,1},...,\frac{16}{N}\&times;M-1,$ And N < M,

The EREG#n (a) of ECCE#i={EPRB#m (a) }

In formula 4, for a=0,1 ..., N-1, $m\left(a\right)=\left(i\mathrm{mod}M\right)+\frac{M}{N}\&times;a-M\&times;\left[\frac{\left(i\mathrm{mod}M\right)+a}{M}\right],$ And here, [x] represents the maximum integer being no more than x.

Figure 13 illustrates according to the ECCE configuration in the distributed EPDCCH group of embodiment 2-2.

In fig. 13, the quantity (" N ") setting up the EREG of ECCE can be " 4 " (N=4), and " i " (i.e. ECCE index #i) corresponding with ECCE index can be " 0 " (i=0).

Figure 13 a illustrates the ECCE configuration according to formula 3 above.With reference to Figure 13 a, the quantity (" M ") setting up the EPRB of EPDCCH group can be " 2 " (M=2).If the numerical value of this variable (such as N=4, i=0, and M=2) be applied to formula 3, then (i) (for a=0), m (0)=1 and n (0)=0, (ii) for (a=1), m (1)=1 and n (1)=1, (iii) (for a=2), m (2)=0 and n (2)=2, and (iv) for (a=3), m (3)=1 and n (3)=3.Therefore, ECCE#0 can be { the EREG#3} of the EREG#2 of the EREG#1 of the EREG#0 of EPRB#0, EPRB#1, EPRB#0, EPRB#1.In other words, as depicted in fig. 13 a, EREG#0 can be selected from EPRB#0, and EREG#1 can be selected from EPRB#1.After this, EREG#2 can be selected from EPRB#0, and EREG#3 can be selected from EPRB#1.ECCE#0 can use selected EREG to configure.

Figure 13 b illustrates the ECCE configuration according to formula 4 above.With reference to Figure 13 b, the quantity (" M ") setting up the EPRB of EPDCCH group can be " 8 " (M=8).If the numerical value of this variable (such as N=4, i=0, and M=8) be applied to formula 4, then (i) (for a=0), m (0)=1 and n (0)=0, (ii) for (a=1), m (1)=2 and n (1)=1, (iii) (for a=2), m (2)=4 and n (2)=2, and (iv) for (a=3), m (3)=6 and n (3)=3.Therefore, ECCE#0 can be { the EREG#3} of the EREG#2 of the EREG#1 of the EREG#0 of EPRB#0, EPRB#2, EPRB#4, EPRB#6.In other words, as illustrated in fig. 13b, (i) EREG#0 can be selected from EPRB#0, and (ii) EREG#1 can be selected from EPRB#2, (iii) EREG#2 can be selected from EPRB#4, and (iv) EREG#3 can be selected from EPRB#6.ECCE#0 can use selected EREG to configure.

embodiment 2-3

With the similar fashion with embodiment 2-2.An EREG is selected to select and map the EREG ading up to N number of quantity each EPRB that can determine from being jumped by EPRB.But, be different from embodiment 2-2, no matter when perform EPRB and jump, can add according to " N " numerical value by selection the alternative of EREG index add the EREG index of " 1 " to perform EREG selection/mapping program.In other words, when distributed EPDCCH group comprises EPRB (such as EPRB#0 to the EPRB# (M-1)) of M quantity, in the EPRB of M quantity, can map by EPRB jump program (namely determining) to select (i.e. EREG be selected from EPRB) for EREG EPRB.Here, EPRB jump program can start from the EREG#0 of EPRB#0, and has the jump size according to the condition of embodiment 1 above.The EREG being used for the configuration of ECCE can be determined by selecting an EREG of the EPRB of each mapping (namely by selecting an EREG from each EPRB mapped by EPRB jump program).

In this case, according to embodiment 2-2 above, no matter when perform EPRB and jump, the EREG index being selected from " corresponding EPRB " (namely by each EPRB that EPRB jump program is determined) can increase " 1 ".But, according to embodiment 2-3, no matter when perform EPRB and jump, select the EREG index of self-corresponding EPRB can increase (being determined by N numerical value) here, can be called " EREG jump size ".Such as, the quantity (" M ") of the EPRB distributed in the configuration for distributed EPDCCH group be 8 (i.e. M=8) and EPDCCH group is configured in the standard down link subframe with standard C P (i.e. N=4), EPRB jump size can be confirmed as according to the condition of embodiment 1 above and, when configuring ECCE according to embodiment 2-3, for selecting the EREG jump size of EREG to be confirmed as in the EPRB from each ECCE of establishment

Therefore, the ECCE (i.e. ECCE#0) forming corresponding EPDCCH group can comprise: the EREG#0 of (i) EPRB#0, (ii) EREG#4 of EPRB#2, (iii) EREG#8 of EPRB#4, and the EREG#12 of (iv) EPRB#6.In like manner, the 2nd ECCE (i.e. ECCE#1) forming corresponding EPDCCH group can comprise: the EREG#0 of (i) EPRB#1, (ii) EREG#4 of EPRB#3, (iii) EREG#8 of EPRB#5, and the EREG#12 of (iv) EPRB#7.In the same manner, last ECCE and M of the first round in the EPDCCH group of correspondence ^theCCE (i.e. ECCE# (M-1)) can use the EREG#0 of (i) EPRB#7, (ii) EREG#8 of the EREG#4 of EPRB#1, (iii) EPRB#3 and the EREG#12 of (iv) EPRB#5 configures.In this example, ECCE#7 and ECCE# (M-1) is corresponding.

When the first round, (ECCE/EREG namely for the configuration of ECCE#0 to ECCE# (M-1) maps) completed as mentioned above, in the EREG that all EPRB (such as EPRB#0 to EPRB# (M-1)) forming corresponding EPDCCH group comprise, " have and [" mould " numerical value=0 that operates] EREG of corresponding EREG index " may be used for the mapping of the ECCE (such as ECCE#0 to ECCE# (M-1)) of M quantity.Here, when " mould " operation (such as in this example, " mould 4 " operate) is when being applied to each EREG index, " have and [" mould " numerical value=0 that operates] EREG of corresponding EREG index " EREG with the EREG index corresponding with [modulus value=0] can be represented.In this example, " M " can be " 8 ".

Take turns in (ECCE/EREG namely for the configuration of ECCE#M to ECCE# (2M-1) maps) second, corresponding ECCE maps and can start from the same manner (M+1) ^theCCE (i.e. ECCE#M) and end at 2M ^theCCE (i.e. ECCE# (2M-1)).Here, (M+1) ^theCCE (i.e. ECCE#M) can be mapped to the EREG#1 of (i) EPRB#0, the EREG#5 of (ii) EPRB#2, the EREG#9 of (iii) EPRB#4 and the EREG#13 of (iv) EPRB#6.2M ^theCCE (i.e. ECCE# (2M-1)) can be mapped to the EREG#1 of (i) EPRB#7, (ii) EREG#9 of the EREG#5 of EPRB#1, (iii) EPRB#3 and the EREG#13 of (iv) EPRB#5.

When what to perform according to N numerical value in the above described manner during wheel, can map and form ading up to of corresponding EPDCCH group the ECCE of individual quantity.In this case, if mapping the N for configuring specific ECCE ^tharrive the last EPRB (namely maximum EPRB) comprised in the EPDCCH group of correspondence before EREG, then can successively perform EREG mapping by applying the cyclic shift again turning back to an EPRB (namely minimum EPRB).

ECCE/EREG mapping method according to the configuration for distributed EPDCCH group of embodiment 2-3 can be expressed by formula 5 below and formula 6.

[formula 5]

For $i=\mathrm{0,1},...,\frac{16}{N}\&times;M-1,$ And N >=M,

The EREG#n (a) of ECCE#i={EPRB#m (a) }

In formula 5, for a=0,1 ..., N-1, and and here, [x] represents the maximum integer being no more than x.。

[formula 6]

For $i=\mathrm{0,1},...,\frac{16}{N}\&times;M-1,$ And N < M,

The EREG#n (a) of ECCE#i={EPRB#m (a) }

In formula 6, for a=0,1 ..., N-1, $m\left(a\right)=\left(i\mathrm{mod}M\right)+\frac{M}{N}\&times;a-M\&times;\left[\frac{\left(i\mathrm{mod}M\right)+a}{M}\right],$ And here, [x] represents the maximum integer being no more than x.

Figure 14 illustrates according to the ECCE configuration in the distributed EPDCCH group of embodiment 2-3.

In fig. 14, the quantity (" N ") setting up the EREG of ECCE can be " 4 " (N=4), and " i " (i.e. ECCE index #i) corresponding with ECCE index can be " 0 " (i=0).

Figure 14 a illustrates the ECCE configuration according to formula 5 above.With reference to Figure 14 a, the quantity (" M ") forming the EPRB of EPDCCH group can be " 2 " (M=2).If the numerical value of this variable (such as N=4, i=0, and M=2) be applied to formula 5, then (i) (for a=0), m (0)=1 and n (0)=0, (ii) for (a=1), m (1)=1 and n (1)=4, (iii) (for a=2), m (2)=0 and n (2)=8, and (iv) for (a=3), m (3)=1 and n (3)=12.Therefore, ECCE#0 can be { the EREG#12} of the EREG#8 of the EREG#4 of the EREG#0 of EPRB#0, EPRB#1, EPRB#0, EPRB#1.In other words, as shown in figures 14a, EREG#0 can be selected from EPRB#0, and EREG#4 can be selected from EPRB#1.After this, EREG#8 can be selected from EPRB#0, and EREG#12 can be selected from EPRB#1.ECCE#0 can use selected EREG to configure.

Figure 14 b illustrates the ECCE configuration according to formula 6 above.With reference to Figure 14 b, the quantity (" M ") forming the EPRB of EPDCCH group can be " 8 " (M=8).If the numerical value of this variable (such as N=4, i=0, and M=8) be applied to formula 6, then (i) (for a=0), m (0)=0 and n (0)=0, (ii) for (a=1), m (1)=2 and n (1)=4, (iii) (for a=2), m (2)=4 and n (2)=8, and (iv) for (a=3), m (3)=6 and n (3)=12.Therefore, ECCE#0 can be { the EREG#12} of the EREG#6 of the EREG#4 of the EREG#0 of EPRB#0, EPRB#2, EPRB#4, EPRB#6.In other words, as shown in fig. 14b, (i) EREG#0 can be selected from EPRB#0, and (ii) EREG#4 can be selected from EPRB#2, (iii) EREG#8 can be selected from EPRB#4, and (iv) EREG#12 can be selected from EPRB#6.ECCE#0 can use selected EREG to configure.

As mentioned above, in the Resource Unit (RE) setting up EREG, the RE being not useable for EPDCCH transmission may be there is due to the size of old PDCCH control area and the existence of reference signal (such as CRS etc.).Therefore, the imbalance of the quantity of the RE of the EPDCCH transmission that can be used for each EREG may be there is.After this, when ECCE configures according to embodiment 2-2 and embodiment 2-3, by the quantity of the available RE of each ECCE of more detailed description.

If old PDCCH control area is of a size of " 2 " individual OFDM symbol, in this case, the quantity of available RE can be described to as table 3 below.

In this case, can by EREG index (index of the EREG namely selected in the EPRB of correspondence) be added " 1 " to configure according to embodiment 2-2, ECCE.Table 4 below can represent the quantity of the available RE of each ECCE when ECCE configures according to embodiment 2-2.

[table 4]

Set up the EREG index of ECCE	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, when a transmit antenna port (" 1Tx CRS "), the ECCE be made up of EREG#0 to EREG#3 can comprise 25 available RE, and the ECCE be made up of EREG#12 to EREG#15 can comprise 31 available RE.Therefore, the available RE difference between two ECCE can be " 6 ".

In like manner, when old PDCCH control area is of a size of " 2 " individual OFDM symbol, table 5 below can represent the quantity of the available RE of the ECCE according to embodiment 2-3 configuration.

[table 5]

Set up the EREG index of ECCE	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

With reference to Fig. 5, when a transmit antenna port (" 1Tx CRS "), the ECCE be made up of EREG#0, EREG#4, EREG#8 and EREG#12 can comprise 28 available RE.The ECCE be made up of EREG#1, EREG#5, EREG#9 and EREG#13 can comprise 29 available RE.Therefore, the available RE difference between two ECCE can be " 1 ".This available RE when embodiment 2-3 poor (such as 1) can be less than the available RE poor (such as 6) when embodiment 2-2.And, when two transmit antenna ports (" 2Tx CRS ") and four transmit antenna port (" 4TxCRS "), can be " 0 " according to the available RE difference between the ECCE that embodiment 2-3 configures.

In example 2, the embodiment be combined with embodiment 1 is described.But the present embodiment is not limited thereto.And the embodiment described in embodiment 2 may independent of embodiment 1.

Such as, the EREG with same index can be used to configure according to embodiment 2-1, ECCE.When the EPDCCH group be made up of 8 EPRB, an ECCE can configure by selecting from EPRB#0, EPRB#2, EPRB#4 and EPRB#6 the EREG (such as corresponding with EREG#0 EREG) with same index.But embodiment 2-1 can independent of embodiment 1.Therefore, in this case, an ECCE can configure by selecting from four continuous print EPRB (such as EPRB#0, EPRB#1, EPRB#2 and EPRB#3) EREG (such as corresponding with EREG#0 EREG) with same index.

Other example be associated with the embodiment 2 independent of embodiment 1 will be described hereinafter.According to embodiment 2-2, an ECCE can use the EREG (such as EREG#0, EREG#1, EREG#2 and EREG#3) corresponding with continuity index to configure.When the EPDCCH group be made up of 2 EPRB, an ECCE can use (i) to be selected from the EREG#0 of EPRB#0, (ii) EREG#1 of EPRB#1 is selected from, (iii) be selected from the EREG#2 of EPRB#0, and the EREG#3 that (iv) is selected from EPRB#1 configures.But embodiment 2-2 can independent of embodiment 1.In this case, ECCE can select EREG#0 by (i) from EPRB#0 and (ii) selects EREG#1 from EPRB#1, and EREG#2, EREG#3 configure.

In like manner, embodiment 2-3 can independent of embodiment 1.More specifically, ECCE can by selecting when not having EPRB to jump in turn increase eREG index configure.Such as, when the EPDCCH group be made up of 2 EPRB, ECCE can select EREG#0 by (i) from EPRB#0, and EREG#4, EREG#8 and (ii) select EREG#12 to configure from EPRB#1.

As mentioned above, embodiment 1 and embodiment 2 can be provided in distributed EPDCCH group the method performing ECCE/EREG and map.In embodiment 2-1, ECCE/EREG mapping function can be limited by formula 1 and formula 2.In embodiment 2-2, ECCE/EREG mapping function can be limited by formula 3 and formula 4.In embodiment 2-3, ECCE/EREG mapping function can be limited by formula 5 and formula 6.But formula 1 to formula 6 represents the exemplary functions formula limited according to each embodiment, and the formula of other form can be expressed as based on embodiment 2-1, embodiment 2-2 and embodiment 2-3.

Figure 15 is the flow chart of the method (1500) for control information transmission in transmission/reception point illustrated according at least one embodiment.

With reference to Figure 15, the data area that transmission/reception point can be right by two or more Physical Resource Block (PRB) in subframe is to user device transmissions control information.In step S1510 place, the control channel unit (ECCE) (or can be called in addition " distributing ECCE ") that transmission/reception point can configure (or formation) strengthens.Here, Resource Unit (RE) in each of two or more PRB centering can according to first frequently scheme (namely first frequency and then time mode) by reusing 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 (such as 4 or 8 EREGs) corresponding with the EREG index with same modulus value.More specifically, step S1510 place configuration ECCE in each can use (i) from when different EREG index divided by 4 time there is same remainder (such as 0,1,2, or 4 EREG that different EREG indexes 3) are corresponding, or (ii) from when different EREG index divided by 2 time there are 8 EREG corresponding to the different EREG indexes of same remainder (such as 0 or 1), configure.

In step S1510 place, the EREG forming ECCE can be positioned at two or more PRB centering.

The example distributing to the right index of PRB is described with reference to Fig. 4.With reference to Fig. 4 and Fig. 7, can according to first frequently scheme (namely first frequency and then time mode) by EREG from 0 numbering (namely indexing) to 15.In embodiment shown in Figure 4, the cyclic shift based on symbol can be used to carry out execution index.More specifically, as shown in Figure 4, after the Resource Unit (RE) pointed out by " 400 " in the first symbol is indexed and is 11 (i.e. indexes 11), it is 12 (i.e. indexes 12) that the adjacent R E pointed out by " 410 " in the second symbol is successively indexed.Meanwhile, in the embodiment of the invention shown in figure 7, execution can index when the cyclic shift not based on symbol.Therefore, in this case, as shown in Figure 7, after the Resource Unit (RE) pointed out by " 700 " in the first symbol is indexed and is 11 (i.e. indexes 11), the RE pointed out by " 710 " in the second symbol index that continued is 12 (i.e. indexes 12).Here, index be 12 RE (" 710 ") not with index be 11 RE (" 700 ") adjacent.

Transmission/reception point can use (i) from when different EREG index divided by 4 time there is same remainder (such as 0,1,2, or the EREG that different EREG indexes 3) are corresponding, or (ii) from when different EREG index divided by 2 time there is EREG corresponding to the different EREG indexes of same remainder (such as 0 or 1), set up ECCE.

Such as, ECCE can use from when different EREG index divided by 4 time there are the different EREG indexes of same remainder (such as 0,1,2, or 3) corresponding EREG configure.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 use from when different EREG index divided by 2 time there is EREG corresponding to the different EREG indexes of same remainder (such as 0 or 1) to configure, 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}.

The EREG setting up ECCE can be positioned at two or more PRB centering.Namely EPDCCH can transmit according to distributed-type.More specifically, in transmission/reception point, distribute the PRB of ECCE to the EPDCCH group (i.e. distributed EPDCCH group) that can form distributed-type.

Transmission/reception point can, by configuring (or distribution) ECCE to PRB to distribution EREG, make frequency diversity gain be maximum.This ECCE collocation method can embody according to embodiment 1 and be not limited thereto.

Get back to Figure 11, transmission/reception point can configure ECCE by selecting EREG in jumping each when two PRB are right in EPRB#2, EPRB#4 and EPRB#6 8 PRB centerings from EPRB#0.The EREG that transmission/reception point can use " PRB determined by jump program to " (such as EPRB#0, EPRB#2, EPRB#4 and EPRB#6) configures (or distribution) ECCE.More specifically, as mentioned above, transmission/reception point can use (i) from when different EREG index divided by 4 time there is EREG corresponding to the different EREG indexes of same remainder, or (ii) from when different EREG index divided by 2 time there is EREG corresponding to the different EREG indexes of same remainder, 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 by selecting (i) from the EREG#12 of EPRB#0, and (ii), from the EREG#8 of EPRB#2, (iii) is from the EREG#4 of EPRB#4, and (iv) is from the EREG#0 of EPRB#6, configure.

[0 is constrained at EREG index, 1,2,15] when, (i) from when different EREG index divided by 4 time there is the combination of EREG corresponding to the different EREG indexes of same remainder, or (ii) from when different EREG index divided by 2 time there is the combination of EREG corresponding to the different EREG indexes of same remainder, may be restrained.Consider this combination, the EREG index (can be called " EREG index-group ") distributing to ECCE can be { 0,4,8,12}, { 1,5,9,13}, { 2,6,10,14}, or { one in 3,7,11,15}.Alternatively, the EREG index-group distributing to ECCE can be { 0,2,4,6,8,10,12,14} or { one in 1,3,5,7,9,11,13,15}.

Get back to Figure 15, in step S1520 place, transmission/reception point can by least one in the ECCE of configuration to user device transmissions control information.

Here, can by the EPDCCH control information transmission corresponding with the control channel limited in data area 220.EPDCCH can be assigned at least one ECCE of PRB centering.

Figure 16 illustrates the flow chart for the method for receiving control information in a user device according to other embodiment.

With reference to Figure 16, the data area that subscriber equipment can be right by two or more PRB in subframe is from transmission/reception point receiving control information.

In step S1610 place, subscriber equipment can receive wireless signal (can be called " radio signal ") by least one ECCE.Here, the Resource Unit (RE) in each of two or more PRB centering can according to first frequently scheme (namely first frequency and then time mode) by reusing 16 numerals (such as, 0,1,2 ..., 15) index.The Resource Unit (RE) with same index can be included in same EREG.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 use (i) from when different EREG index divided by 4 time there is same remainder (such as 0,1,2, or 4 EREG that different EREG indexes 3) are corresponding, or (ii) from when different EREG index divided by 2 time there are 8 EREG corresponding to the different EREG indexes of same remainder (such as 0 or 1), configure.And in step S1620 place, subscriber equipment can obtain control information from the wireless signal received.

In step S1610, the EREG forming ECCE can be positioned at two or more PRB centering.

Describe with reference to Fig. 4 to Fig. 9 and distribute to the example of the right index of PRB, with reference to Fig. 4 and Fig. 7, can according to first frequently scheme (namely first frequency and then time mode) by EREG from 0 numbering (namely indexing) to 15.In embodiment shown in Figure 4, the cyclic shift based on symbol can be used to carry out execution index.More specifically, as shown in Figure 4, after the Resource Unit (RE) pointed out by " 400 " in the first symbol is indexed and is 11 (i.e. indexes 11), it is 12 (i.e. indexes 12) that the Resource Unit (RE) pointed out by " 410 " in the second symbol is successively indexed.Meanwhile, in the embodiment of the invention shown in figure 7, execution can index when the cyclic shift not based on symbol.Therefore, in this case, as shown in Figure 7, after the Resource Unit (RE) pointed out by " 700 " 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 " 710 " in the second symbol is successively indexed.Here, index be 12 RE (" 710 ") not with index be 11 RE (" 700 ") adjacent.

ECCE can use (i) from when different EREG index divided by 4 time there is same remainder (such as 0,1,2, or the EREG that different EREG indexes 3) are corresponding, or (ii) from when different EREG index divided by 2 time there are the different EREG indexes of same remainder (such as 0 or 1) corresponding EREG configure.In other words, this EREG can distribute for ECCE configuration.

Such as, ECCE can use from when different EREG index divided by 4 time there are the different EREG indexes of same remainder (such as 0,1,2, or 3) corresponding EREG configure.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 use from when different EREG index divided by 2 time there is same remainder (such as 0 or 1) the corresponding EREG of different EREG indexes to configure, 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}.

The EREG setting up ECCE can be positioned at two or more PRB centering.Namely EPDCCH can transmit according to distributed-type.More specifically, the PRB of ECCE is distributed to the EPDCCH group (i.e. distributed EPDCCH group) can setting up distributed-type.

EREG can be assigned to and be in relative maximum to PRB to making frequency diversity gain with distributing.This ECCE distribution method can embody according to embodiment 1 and be not limited thereto.

Get back to Figure 11, ECCE can use the EPRB#2 be selected from when jumping every two PRB from the EPRB#0 of 8 PRB centerings, and the EREG of each in EPRB#4 and EPRB#6 configures.The EREG that ECCE can use " PRB determined by jump program to " (such as EPRB#0, EPRB#2, EPRB#4 and EPRB#6) configures.More specifically, as mentioned above, ECCE can use (i) from when different EREG index divided by 4 time there is EREG corresponding to the different EREG indexes of same remainder, or (ii) from when different EREG index divided by 2 time there is EREG corresponding to the different EREG indexes of same remainder, 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 by selecting (i) from the EREG#12 of EPRB#0, and (ii), from the EREG#8 of EPRB#2, (iii) is from the EREG#4 of EPRB#4, and (iv) is from the EREG#0 of EPRB#6, configure.

[0 is constrained at EREG index, 1,2,15] when, (i) from when different EREG index divided by 4 time there is the combination of EREG corresponding to the different EREG indexes of same remainder, or (ii) from when different EREG index divided by 2 time there is the combination of EREG corresponding to the different EREG indexes of same remainder can be restrained.Consider this combination, the EREG index (can be called " EREG index-group ") distributing to ECCE can be { 0,4,8,12}, { 1,5,9,13}, { 2,6,10,14}, or { one in 3,7,11,15}.Alternatively, the EREG index-group distributing to ECCE can be { 0,2,4,6,8,10,12,14} or { one in 1,3,5,7,9,11,13,15}.

Get back to Figure 16, in step S1620 place, then transmission/reception point can obtain control information.

Figure 17 is the schematic diagram of the transmission/reception point illustrated according to some embodiments.

With reference to Figure 17, according to the present embodiment, the data area that transmission/reception point 1700 can be right by two or more PRB in subframe is to user device transmissions control information.According to the present embodiment, transmission/reception point 1700 can comprise control processor 1710, transmitter 1720 and receiver 1730.

Control processor 1710 can configure (or formed) ECCE (or being called herein " distributing ECCE ").More specifically, can according to first frequently scheme (namely first frequency and then time mode) by reusing 16 numerals (such as, 0,1,2 ..., 15) and carry out in each of two or more PRB centering of index Resource Unit (RE).The Resource Unit (RE) with same index can be included in identical enhancing resource unit group (EREG).Each ECCE can comprise the EREG (such as 4 or 8 EREG) indexing corresponding with the EREG with identical modulus value.In detail, control processor 1710 can use (i) when different EREG index divided by 4 time with there is same remainder (such as, 0,1,2, or 3) different EREG index 4 corresponding EREG, or (ii) when different EREG index divided by 2 time with there is same remainder (such as, 0 or 1) different EREG index 8 corresponding EREG, configure each ECCE.

Control processor 1710 can control " ECCE configuration " (or can be called " ECCE distribution "), makes the EREG setting up ECCE be positioned at one or more PRB centering.Namely EPDCCH can be transmitted according to distributed-type.More specifically, in transmission/reception point 1700, distribute the PRB of ECCE to the EPDCCH group (i.e. distributed EPDCCH group) that can form distributed-type.

Index at EREG and be constrained in [0,1,2,15] when, (i) when different EREG index divided by 4 time to index the combination of corresponding EREG from the different EREG with same remainder, or (ii) when different EREG index divided by 2 time index the combination of corresponding EREG from the different EREG with same remainder can be restrained.Consider this combination, the EREG distributing to ECCE indexs (can be called " EREG index group ") can be { 0,4,8,12}, { 1,5,9,13}, { 2,6,10,14} and { one in 3,7,11,15}.Alternatively, the EREG distributing to ECCE group of indexing can be { 0,2,4,6,8,10,12,14} and { one in 1,3,5,7,9,11,13,15}.

In addition, the method that control processor 1710 can be indexed according to the method for ECCE/EREG mapping and/or the ECCE for performing in specific distribution formula EPDCCH group for performing EPDCCH transmission carrys out the operation of controls transfer/acceptance point 1700.

Transmitter 1720 can by least one in the ECCE of configuration to user device transmissions control information.

Transmitter 1720 and receiver 1730 can transmit respectively in conjunction with subscriber equipment and receive signal, message and/or the data for performing above-mentioned the present embodiment.

Figure 18 is the schematic diagram of the subscriber equipment illustrated according to some embodiments.

With reference to Figure 18, according to the present embodiment, the data area that subscriber equipment 1800 can be right by two or more PRB in subframe is from transmission/reception point (i.e. transmission/reception point 1700) receiving control information.According to the present embodiment, subscriber equipment 1800 can comprise receiver 1810, control processor 1820 and transmitter 1830.

Receiver 1830 can receive the wireless signal with at least one ECCE.Here, can according to first frequently scheme (namely first frequency and then time mode) by reusing 16 numerals (such as, 0,1,2 ..., 15) and carry out in each of two or more PRB centering of index Resource Unit (RE).The Resource Unit (RE) with same index can be included in identical EREG.Each at least one ECCE can comprise the corresponding EREG that to index with the EREG with identical modulus value.More specifically, each at least one ECCE can use (i) when different EREG index divided by 4 time with there is same remainder (such as, 0,1,2, or 3) different EREG index 4 corresponding EREG, or (ii) when different EREG index divided by 2 time with there is same remainder (such as, 0 or 1) different EREG index 8 corresponding EREG, configure.

The EREG setting up ECCE can be positioned at two or more PRB centering.Namely EPDCCH can be transmitted according to distributed-type.More specifically, in transmission/reception point, distribute the PRB of ECCE to the EPDCCH group (i.e. distributed EPDCCH group) can setting up distributed-type.

Index at EREG and be constrained in [0,1,2,15] when, (i) when different EREG index divided by 4 time to index the combination of corresponding EREG from the different EREG with same remainder, or (ii) when different EREG index divided by 2 time index the combination of corresponding EREG from the different EREG with same remainder can be restrained.Consider this combination, the EREG distributing to ECCE indexs (i.e. " EREG index group ") can be { 0,4,8,12}, { 1,5,9,13}, { 2,6,10,14} and { one in 3,7,11,15}.Alternatively, the EREG distributing to ECCE group of indexing can be { 0,2,4,6,8,10,12,14} and { one in 1,3,5,7,9,11,13,15}.

Control processor 1820 can obtain control information from the wireless signal received.Further, control processor 1820 can control the operation (i.e. the operation of subscriber equipment 1800) that needs for performing above-mentioned the present embodiment.More specifically, control processor 1820 can according to the operation controlling subscriber equipment 1800 for the ECCE/EREG mapping that EPDCCH receives and/or ECCE indexs in specific distribution formula EPDCCH group.

Receiver 1810 and transmitter 1830 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 35U.S.C. § 119 (on September 18th, 2012 submit to) korean patent application No.10-2012-0103584 and (on December 13rd, 2012 submit to) korean patent application No.10-2012-0145368, by reference its full content is incorporated herein.

Claims (20)

1. in transmission/reception point by the method for the right data area of two or more 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) in each of () two or more 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, (iii) each in ECCE comprises 4 or 8 EREGs corresponding from following different EREG index, this different EREG index has same remainder when it divided by during one in 4 and 2, and each EREG comprised (iv) in ECCE is positioned at two or more PRB centering, and

By at least one in ECCE to user device transmissions control information.

2. method according to claim 1, wherein, described formation ECCE comprises: by forming ECCE to two or more PRB to distribution EREG, frequency diversity gain is in relative maximum horizontal.

3. method according to claim 1, wherein, two or more PRB is in physical downlink control channel (EPDCCH) group strengthened be included according to distributed-type schematic design making.

4. method according to claim 1, wherein, the EREG index-group corresponding with each in ECCE is chosen as 0,4,8,12}, and 1,5,9,13}, 2,6,10,14}, or { one in 3,7,11,15}.

5. method according to claim 1, wherein, the EREG index-group corresponding with each in ECCE is chosen as { 0,2,4,6,8,10,12,14} or { one in 1,3,5,7,9,11,13,15}.

6., in a user device by the method for the right data area of two or more 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) in each of () two or more 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, (iii) each in ECCE comprises 4 or 8 EREGs corresponding from following different EREG index, this different EREG index has same remainder when it divided by during one in 4 and 2, and each EREG comprised (iv) in ECCE is positioned at two or more PRB centering, and

Control information is obtained from the wireless signal received.

7. method according to claim 6, wherein, described ECCE, by being formed to two or more PRB distribution EREG, makes frequency diversity gain be in relative maximum horizontal.

8. method according to claim 6, wherein, two or more PRB is in physical downlink control channel (EPDCCH) group strengthened be included according to distributed-type schematic design making.

9. method according to claim 6, wherein, the EREG index-group corresponding with each in ECCE is chosen as 0,4,8,12}, and 1,5,9,13}, 2,6,10,14}, or { one in 3,7,11,15}.

10. method according to claim 6, wherein, the EREG index-group corresponding with each in ECCE is chosen as { 0,2,4,6,8,10,12,14} or { one in 1,3,5,7,9,11,13,15}.

11. 1 kinds for by the transmission/reception point of the right data area of two or more Physical Resource Block (PRB) in subframe to user device transmissions control information, described transmission/reception point comprises:

Control processor, be configured to form the control channel unit (ECCE) strengthened, wherein, i the Resource Unit (RE) in each of () two or more 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, (iii) each in ECCE comprises 4 or 8 EREGs corresponding from following different EREG index, this different EREG index has same remainder when it divided by during one in 4 and 2, and each EREG comprised (iv) in ECCE is positioned at two or more PRB centering, 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, described control processor is configured to, by forming ECCE to two or more PRB to distribution EREG, frequency diversity gain is in relative maximum horizontal.

13. transmission/reception points according to claim 11, wherein, two or more PRB is in physical downlink control channel (EPDCCH) group strengthened be included according to distributed-type schematic design making.

14. transmission/reception points according to claim 11, wherein, the EREG index-group corresponding with each in ECCE is chosen as 0,4,8,12}, and 1,5,9,13}, 2,6,10,14}, or { one in 3,7,11,15}.

15. transmission/reception points according to claim 11, wherein, the EREG index-group corresponding with each in ECCE is chosen as { 0,2,4,6,8,10,12,14} or { one in 1,3,5,7,9,11,13,15}.

16. 1 kinds for by the subscriber equipment of the right data area of two or more 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) in each of () two or more 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, (iii) each in ECCE comprises 4 or 8 EREGs corresponding from following different EREG index, this different EREG index has same remainder when it divided by during one in 4 and 2, and each EREG comprised (iv) in ECCE is positioned at two or more PRB centering, and

Control processor, it is configured to obtain control information from the wireless signal received.

17. subscriber equipmenies according to claim 16, wherein, described ECCE, by being formed to two or more PRB distribution EREG, makes frequency diversity gain be in relative maximum horizontal.

18. subscriber equipmenies according to claim 16, wherein, two or more PRB is in physical downlink control channel (EPDCCH) group strengthened be included according to distributed-type schematic design making.

19. subscriber equipmenies according to claim 16, wherein, the EREG index-group corresponding with each in ECCE is chosen as 0,4,8,12}, and 1,5,9,13}, 2,6,10,14}, or { one in 3,7,11,15}.

20. subscriber equipmenies according to claim 16, wherein, the EREG index-group corresponding with each in ECCE is chosen as { 0,2,4,6,8,10,12,14} or { one in 1,3,5,7,9,11,13,15}.