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CN108155980A - The reception and configuration of downlink control channel - Google Patents

The reception and configuration of downlink control channel Download PDF

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Publication number
CN108155980A
CN108155980A CN201810116389.4A CN201810116389A CN108155980A CN 108155980 A CN108155980 A CN 108155980A CN 201810116389 A CN201810116389 A CN 201810116389A CN 108155980 A CN108155980 A CN 108155980A
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China
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epdcch
ecce
user equipment
ereg
transmission
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CN201810116389.4A
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CN108155980B (en
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朴奎镇
崔宇辰
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Google LLC
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Google LLC
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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

Abstract

The present invention relates to the receptions and configuration of downlink control channel.The invention particularly relates to for the method and apparatus (such as user equipment) for receiving the downlink control channel being located in data area and for being configured and transmitting the method and apparatus of the downlink control channel (such as transmission/receiving point).

Description

The reception and configuration of downlink control channel
The application is divisional application, and the application number of original bill is 201380059386.7, and the applying date is September in 2013 13, Denomination of invention is " reception and configuration of downlink control channel ".
Technical field
The present invention relates to the receptions and configuration of downlink control channel.The invention particularly relates to be located at data for receiving Method and apparatus (such as user equipment) of downlink control channel in region and for being configured and transmitting the downlink chain The method and apparatus of road control channel (such as transmission/receiving point).
Background technology
In order to which the limited resources in wireless communication system are efficiently used, it may be necessary to control channel.However, control area Resource may correspond to overhead, therefore reduce the resource of the data area available for data transmission.Can be to multiple use In the wireless communication system of family transmission data, system capability raising may be limited due to the limited resources of typical control area.
Therefore, in order to increase control channel resource, it may be necessary to use space division multiplexing scheme in the data area The method of transmission/reception multi-user control channel.In this case, it is possible to the search space for needing to configure user equipment causes Down link control information (DCI) is received by the control channel.
Invention content
According at least one embodiment, can provide a kind of in the case where the middle reception of user equipment (UE) is located in data area The method of Uplink Control Channel.The method may include every in the K EPDCCH set by being used to form in subframe A N number of Physical Resource Block (PRB) to the data area, the physical down link control of enhancing is received from transmission/receiving point Channel (EPDCCH) processed, wherein (i) described K and N is greater than or equal to 1 natural number, each of (ii) N number of PRB pair includes 16 The resource element groups (EREG) of a enhancing, and (iii) and the control channel of the EPDCCH transmission corresponding enhancings of basic unit Element (ECCE) includes 4 or 8 EREG；And according to the down link control information in EPDCCH UE dedicated search space (DCI) form decodes the EPDCCH in corresponding EPCCCH set, wherein the decoding to the EPDCCH is related The ECCE of connection by the user equipment radio network temporary identifier (RNTI), the index of the subframe, polymerization grade and institute State the function definition of the ECCE total numbers of corresponding EPCDDH set.
According to another embodiment, it can provide and a kind of be used in transmission/receiving point search user equipment (UE) is special Configuration is located at the method for the downlink control channel in data area in rope space.The method may include in EPDCCH It is corresponding with the BTU Basic Transmission Unit of the physical downlink control channel of enhancing (EPDCCH) defined in UE dedicated search space Enhancing control channel element (ECCE), wherein (i) described EPDCCH is located at and is used to form K EPDCCH in subframe and gathers In each N number of Physical Resource Block (PRB) to the data area in, (ii) described K and N be greater than or equal to 1 from So number, each resource element groups (EREG) for including 16 enhancings of (iii) N number of PRB pair, (iv) each described ECCE include 4 Or 8 EREG, and (v) described ECCE by the radio network temporary identifier (RNTI) of user equipment, the indexing of the subframe, gather Close the function definition of the ECCE total numbers of grade and corresponding EPCDDH set；And by the EPDCCH to the user Equipment transmits the ECCE defined in the EPDCCH UE dedicated search space.
According to another embodiment, the use for receiving the downlink control channel being located in data area can be provided Family equipment.The user equipment can include receiver and control processor.The receiver can be configured as reception and pass through Be used to form each N number of Physical Resource Block (PRB) in the K EPDCCH set in subframe to the data area from biography Defeated/receiving point receives the physical downlink control channel (EPDCCH) of enhancing.Here (i) described K and N is greater than or equal to 1 Natural number, each resource element groups (EREG) for including 16 enhancings of (ii) N number of PRB pair, and (iii) is passed with EPDCCH The control channel element (ECCE) of the defeated corresponding enhancing of basic unit includes 4 or 8 EREG.The control processor can be by It is configured to be decoded corresponding according to down link control information (DCI) form in EPDCCH UE dedicated search space The EPDCCH in EPCCCH set, wherein ECCE associated with the decoding of the EPDCCH is by the user equipment Radio network temporary identifier (RNTI), the index of the subframe, polymerization grade and corresponding EPCDDH set ECCE The function definition of total number.
According to further embodiment, can provide for the configuration bit in EPDCCH user equipmenies (UE) dedicated search space Transmission/receiving point of downlink control channel in data area.Transmission/the receiving point can include control processor And transmitter.The control processor can be configured as the base with EPDCCH defined in EPDCCH UE dedicated search space The control channel element (ECCE) of the corresponding enhancing of this transmission unit.Here (i) described EPDCCH, which is located at, is used to form subframe In K EPDCCH set in each N number of Physical Resource Block (PRB) to the data area in, (ii) described K and N 1 natural number is greater than or equal to, each resource element groups (EREG) for including 16 enhancings of (iii) N number of PRB pair, (iv) Each ECCE includes 4 or 8 EREG, and (v) described ECCE by user equipment radio network temporary identifier (RNTI), The function of the ECCE total numbers definition that index, polymerization grade and the corresponding EPCDDH of the subframe gather.The transmitter can Be configured as by the EPDCCH to the user device transmissions defined in the EPDCCH UE dedicated search space The ECCE.
It is configured as under the physics by the corresponding enhancing of downlink control channel with newly using in user equipment In the case that Uplink Control Channel (EPDCCH) receives down link control information (DCI), these embodiments are related to for institute It states each polymerization grade (AL) of the user equipment in an EPDCCH gathers (or multiple EPDCCH set) and performs blind decoding Method and apparatus.
Description of the drawings
Fig. 1 is the schematic diagram of wireless communication system that at least one embodiment of description can be adapted for；
Fig. 2 describes a resource block pair in the case of general cyclic prefix (common CP), as in long term evolution (LTE) example of the down-chain resource structure or in advanced LTE (LTE-A) system；
Fig. 3 describes the search space in two user equipmenies；
Fig. 4 describes the two class EPDCCH transmission including localization EPDCCH transmission and distribution EPDCCH transmission；
Fig. 5 describes the physics being indexed in the case of a transmission antenna port (CRS ports 0) according to EREG Index process Resource block (PRB) to resource element (RE) map；
Fig. 6 describes what is be indexed according to EREG Index process in the case of two transmission antenna ports (CRS ports 0 and 1) The RE mappings of PRB pair；
Fig. 7 is described in the case of four transmission antenna ports (CRS ports 0,1,2 and 3) according to EREG Index process by rope The RE mappings of the PRB pair drawn；
Fig. 8 is to describe to be configured in the EPDCCH UE dedicated search space of transmission/receiving point according at least one embodiment The flow chart of the method for downlink control channel in data area；
Fig. 9 is described to be matched according in EPDCCH UE dedicated search space of at least one embodiment in transmission/receiving point Setting in ECCE start offset values determining in the method for the downlink control channel in data area；
Figure 10 is to describe to receive the downlink control in data area in a user device according to other embodiments The flow chart of the method for channel；
Figure 11 is the schematic diagram for describing the base station according to several embodiments；
Figure 12 is the schematic diagram for describing the user equipment according to several embodiments.
Specific embodiment
Hereinafter, it will be described about an exemplary embodiment of the present invention in conjunction with the accompanying drawings.In the description that follows, even if being illustrated in not In same figure, identical element will be specified by identical reference number.In addition, in the description of subsequent the present embodiment, when can When can cause the present embodiment theme not know, the known function and the detailed description of configuration that are included herein will be omitted.
Can be widely used according at least one embodiment wireless communication system to provide diversified communication service, Such as voice service, packet data service etc..The wireless communication system can include user equipment (UE) and at least one biography Defeated/receiving point.In the present specification, term " user equipment " or " (UE) " are used as general conception, including channel radio Terminal in letter.Therefore, which should be interpreted a concept, including movement station (MS), user terminal (UT), order Family station (SS) and/or wireless device in Global Systems for Mobile communications (GSM) and in wideband code division multiple access (WCDMA) User equipment, long term evolution (LTE) and/or high-speed packet access (HSPA).
Transmission/the receiving point can indicate the station to communicate with user equipment.Such transmission/receiving point can be referred to as not With term, for example, base station (BS), cell, node B, evolution node B (eNB), sector, website, base station transceiver system (BTS), access point (AP), relay node (RN), remote radio-frequency heads (RRH), radio frequency unit (RU) etc..
That is, in the present specification, the transmission/receiving point, the base station (BS) or the cell can be interpreted to wrap The concept of appearance is indicated by the base station controller (BSC) in CDMA (CDMA), the eNB in node B, LTE in WCDMA Or the region of coverings such as sector (website) or a part for function.Therefore, transmission/receiving point, base station (BS) and/or cell is general Diversified overlay area can be included by reading, such as huge cell, macrocell, Microcell, picocell, Femto cell etc.. In addition, such concept can include the communication of the relay node (RN), the remote radio-frequency heads (RRH) or the radio frequency unit (RU) Range.
In the present specification, the user equipment and the transmission/receiving point can be have two transmission of inclusiveness meaning/ Main body is received, for embodying science and technology and technological concept disclosed herein, and can be not limited in specific nomenclature or use Word.In addition, the user equipment and the transmission/receiving point can be that there is the uplink of inclusiveness meaning or downlink to pass It is defeated/to receive main body, for embodying disclosed science and technology and technological concept related to the present embodiment, and can be not limited in tool The term of body or word.Here, uplink (UL) transmission/reception is to transmit data from user equipment to transmission/receiving point Scheme.Alternatively, downlink (DL) transmission/reception is from the transmission/receiving point to user device transmissions by data Scheme.
The wireless communication system can use diversified multiple access scheme, such as CDMA, time division multiple acess (TDMA), frequency division Multiple access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, OFDM-TDMA, OFDM-CDMA and/or other.However this The multiple access scheme of sample is without being limited thereto.At least one embodiment can be applied to evolve to LTE by GSM, WCDMA and HSP With in the field of the asynchronous wireless communication of advanced LTE (LTE-A) and be evolved to CDMA, CDMA-2000 nothing synchronous with UMB Resource allocation in the field of line communication.The present embodiment is not necessarily to be construed as being limited to or is limited by specific wireless communication neck Domain, and all technical fields that can be applicable in the present embodiment spirit should be interpreted as including.
In the case of uplink transmission and downlink transmission, time division multiplexing (TDD) and frequency division can be at least used One be multiplexed in (FDD).Here, which can perform uplink/downlink transmission using the different time.
In respective standard LTE or lte-a system is met, a carrier wave can be based on or a pair of of carrier wave forms a uplink Link and/or a downlink.In the case of the uplink and/or downlink, such as physical down chain can be passed through Road control channel (PDCCH), Physical Control Format Indicator Channel (PCFICH), physical mixed ARQ instruction channels (PHICH), object Manage control channel transmission control information as uplink control channel (PUCCH) and/or others.Such as physics can be passed through Downlink sharied signal channel (PDSCH), physical uplink shared channel (PUSCH) and/or data channel as others Transmit data.In the present specification, PDCCH can be the concept for including EPDCCH.
In the present specification, term " cell " can represent by transfer point or the signal of transmission/receiving point transmission, have and cover One in the coverage area of the component carrier of lid range and the transmission/receiving point.Here, term " transmission/receiving point " can With the receiving point for representing the transfer point of transmission signal, receiving signal, and combinations thereof one in (i.e. transmission/receiving point).
In the present specification, term " HARQ ACK/NACK " is that hybrid automatic repeat-request (HARQ) confirms (ACK)/no Recognize the abbreviation of (NACK), and hybrid-ARQ can be referred to as and confirm or mix ack/nack signal.Channel state information CSI can It can mean that channel status information reports, such as grade instruction (RI), pre-coding matrix instruction (PMI) and channel quality instruction (CQI)。
Fig. 1 is the schematic diagram of wireless communication system that at least one embodiment of description can be adapted for.
Referring to Fig. 1, wireless communication system 100 may be coordinated multipoint transmission/reception (CoMP) system, multi-antenna cooperative biography One in defeated system, multi-cell cooperative communication system.Here, which can be by between multiple transmission/receiving points Cooperation transmission signal.As CoMP system wireless communication system 100 can include multiple transmission/receiving points 110 and 112 and At least one user equipment (UE) 120 or 122.
As shown in this figure, the transmission/receiving point may be the first transmission/receiving point (such as eNB 110) and second transmission/ One in receiving point (such as RRH 112).Here, the first transmission/receiving point (such as eNB 110) may be base station or macrocell (or grand node).Second transmission/receiving point (such as RRH112) may be by optical cable or optical fiber is connected to this and first transmits/connects The controlled at least one picocell of sink (such as eNB 110) line.In addition, second transmission/receiving point (such as RRH 112) can Can have large transmission power or low transmission power in macrocell area.First and second transmission/receiving point (such as eNB 110 With RRH 112) may have identical cell ID (ID) or different cell IDs.
Hereinafter, downlink (DL) can represent by transmission/receiving point 110 and 112 to user equipment 120 communication or Communication path.Uplink (UL) can represent logical by user equipment 120 to the communication of transmission/receiving point 110 and 112 or communication Road.In the downlink, transmitter can be a part for transmission/receiving point 110 and 112 and receiver can be that user sets Standby 120 and 122 part.In the uplink, transmitter can be a part for user equipment 120, and receiver can To be a part for transmission/receiving point 110 and 112.
Hereinafter, signal is transmitted or is received by the channel as PUCCH, PUSCH, PDCCH and/or PDSCH Situation, statement " transmission or receive PUCCH, PUSCH, PDCCH and/or PDSCH " can be referred to as.
It can with a corresponding first transmission/receiving point (such as eNB 110) in transmission/receiving point (such as 110 and 112) To perform the downlink transmission to user equipment 120 and 122.First transmission/receiving point (such as eNB 110) can be to unicast It transmits and transmits PDSCH corresponding with primary physical channel.In addition, first transmission/receiving point (such as eNB 110) can be transmitted PDCCH controls information with communicating downlink, and the scheduling information and transmission as needed for being used to receive PDSCH are for uplink The scheduling grant information of circuit-switched data channel (such as PUSCH) transmission.Hereinafter, " by transmission or signal is received " to be claimed For statement " transmission receives channel ".
In wireless communications, a radio frames can include 10 subframes, and a subframe can include two time slots. The radio frames can have the length of 10ms, and the subframe can have the length of 1.0ms.Typically, the base of data transmission This unit can be subframe, and downlink or uplink scheduling can perform in subframe unit.Before ordinary cycle In the case of sewing (CP), a time slot can be included in 7 OFDM symbols in the time domain.In the cyclic prefix (CP) of extension In situation, a time slot can be included in 6 OFDM symbols in the time domain.
It for example, can be with being divided into the frequency domain that is formed in the unit of sub-carriers of 15kHz in wireless communications.
In the downlink, running time-frequency resource can be determined in resource block (RB) unit.Resource block (RB) can by when A time slot in countershaft and the 180kHz in frequency axis (12 subcarriers) compositions.It is carried by a son in time shaft The resource element of wave (corresponding two time slots) and 12 sub- carrier wave compositions in frequency axis can be referred to as resource block pair (RBP).According to system bandwidth, the sum of resource block may be different.Including with identical PRB indexes in the first slot The Physical Resource Block of PRB and the PRB in the second time slot (PRB) are to can correspond to the resource in a downlink subframe Distribute basic unit.In the present specification, which can be referred to as PRB.Resource element (RE) can be by the time shaft A sub- carrier wave composition in one OFDM symbol and the frequency axis.One resource block can include 14x12 money to (RBP) Source element (in the case of common CP) or 12x12 resource element (in the case where extending CP).
Fig. 2 describes a resource block pair in the case of general cyclic prefix (common CP), as in long term evolution (LTE) example of the down-chain resource structure or in advanced LTE (LTE-A) system.
Referring to Fig. 2, in the case of general cyclic prefix (CP), a resource block can include 14 OFDM to (RBP) Symbol (l=0,1 ... 13) and 12 subcarriers (k=0 ... 11).In the embodiment shown in Figure 2, a resource block pair (RBP) 14 OFDM symbols can be included.In 14 OFDM symbols, preceding 3 OFDM symbols (l=0-2) can correspond to For such as physical control format indicator channel (PCFICH), Physical Hybrid ARQ Indicator channel (PHICH), physical down link The control area 210 of the control channel distribution of control channel (PDCCH) etc..Remaining OFDM symbol (l=3-13) can correspond to In the data area 220 of the data channel assignment for such as physical down link sharing channel (PDSCH).Although it is in fig. 2 control Region 210 processed is assigned with 3 OFDM symbols, but can 1 to 4 OFDM symbols are distributed in region 210 in order to control according to each embodiment Number.The information of size about control area 210 can be transmitted by the PCFICH.Here, which can be set Number for OFDM symbol.
PDCCH can pass through whole system bandwidth for transmission.PDSCH can be based on resource block and transmit.User equipment can be known Not corresponding PDCCH (that is, distributing to the PDCCH of the user equipment), and there is no data (that is, needle in the corresponding PDCCH To the data of user) when enter microsleep sleep mode.Therefore, it is possible to reduce the energy of the user equipment in data area 220 Amount consumption.
Referring to Fig. 2, reference signal can be mapped to the specific resource element of downlink.That is, common reference Signal (or cell special reference, hereinafter referred to CRS) 230, demodulated reference signal (DM-RS) (or user's dedicated reference Signal) 232 and 234, channel state information reference signals (CSI-RS) etc. can pass through downlink transmission.In fig. 2, in order to Facilitate description, only elaborate CRS 230 and DM-RS 232 and 234.
CRS 230 in control area 210 can be used to carry out channel estimation and be decoded for PDCCH.Data area CRS 230 in 220 can be used for downlink channel measurement.DM-RSs 232 and/or 234 can be used to perform to count According to the decoded channel estimation of the data in region 220.Orthogonal code multiplexing DM-RSs 232 and 234 can be used as multiple layers Reference signal.For example, in the case where 4 layers transmit, can lead to for 2 different reference signals of each reference signal group It crosses on 2 continuous reference signal resource elements that the orthogonal code that length is 2 is applied in time shaft and is re-used.In 8 layers of biography In the case of defeated, for each reference signal group 4 different reference signals can by by length be 4 orthogonal code application It is re-used on to 4 reference signal resource elements being distributed in the time shaft.
In the case where 1 layer or 2 layers transmits, passed since a DM-RS group (that is, DM-RS groups 1 (232)) can be only used Reference signal every layer defeated, therefore another DM-RS group (that is, DM-RS groups 2 (234)) can be used for data transmission.Corresponding to every The DM-RS of layer can be pre-coded according to the precoding scheduling applied to every layer and be transferred to user equipment.Therefore, receiving side (i.e. user equipment) can perform data decoding not applying in the case of the precoding information of emitting side (i.e. base station).
In order to which limited resources are efficiently used in a wireless communication system, it may be necessary to control channel.However, control area 210 resource can correspond to overhead, and therefore reduce the resource of the data area 220 available for data transmission. In LTE system based on OFDM, a resource block can include 14 or 12 OFDM symbols to (RBP).In the OFDM symbol, Most 3 OFDM symbols can be used in control area 210, and remaining OFDM symbol can be used in data area 220.Meanwhile in the lte-a system for having the ability to transmit data to multiple users, system capability enhancing may be because of typical control zone The limited resources in domain (i.e. 210) and be limited.Therefore, in order to increase control channel resource, it may be necessary to consider that transmission/reception is mostly used The method of family control channel uses space division multiplexing scheme such as in data area 220.In other words, this method can be in data Transmission/reception control channel in region 220.For example, the control channel transmitted in data area 220 can be referred to as extending PDCCH or enhancing PDCCH, but not limited to this.
As described above, in typical (or existing) 3GPP LTE/LTE-A rel-8/9/10 systems, in order to receive down Line link DCI, all user equipmenies are relied on through previous, the first two or first three OFDM symbol in downlink subframe (in the case where system bandwidth is more than 10PRB) or the first two, first three a or first four OFDM symbol (are less than in system bandwidth In the case of 10PRB) transmission PDCCH.Can be control for the PDCCH of the given user equipment basic units transmitted Channel element (CCE).Here, a CCE can include 9 resource element groups (REGs).One REG can be included in frequency axis In 4 continuous resource elements (RE).Especially transmitted not in the PDCCH region for not being included in corresponding downlink subframe The surplus resources element (RE) of the resource element (RE) of same physical channel (such as PCFICH/PHICH) and physical signal (such as CRS) In can select 4 continuous resource elements (RE) of a REG.
EPDCCH resource impacts are performed in order to be directed to given user equipment, can use or define correspondence in the EPDCCH In the enhancing REG (EREG) of the REG or CCE of typical PDCCH or enhancing CCE (ECCE).
As described above, in typical (or existing) 3GPP LTE/LTE-A rel-8/9/10 systems, in order to receive down Line link DCI, all user equipmenies are performed through previous, the first two or first three OFDM symbol in downlink subframe (in the case where system bandwidth is more than 10PRB) or the first two, first three a or first four OFDM symbol (are less than in system bandwidth In the case of 10PRB) transmission the PDCCH blind decoding.In this case, in order to which the PDSCH for user equipment connects It receives and provides enough processing times and for the energy expenditure for reducing the user equipment, can be based on according to PDSCH/PUSCH The corresponding DCI format that transmission mode determines performs the blind decoding limited with each polymerization grade (AL) in search space is limited The blind decoding of the same number of number.That is, the blind decoding is not that the polymerization grade (AL) and DCI are based in entire PDCCH region Form performs.
Fig. 3 describes the search space in two user equipmenies.
It, can be according to passing through downlink according to the given user equipment of 3GPP LTE/LTE-A rel-8/9/10 referring to Fig. 3 In the PDCCH of link sub-frame transmission public search space (CSS) region and user's dedicated search space (USS) region (or this In be referred to as terminal-specific search space regions) in polymerization grade (ALs) perform blind decoding and limit the number.Here, usually For the CSS regions of all user device configurations in the cell belonging to corresponding user equipment.The USS regions are only set by user Standby configuration.
Corresponding PDCCH region can be divided into the control corresponding to the resource allocation basic unit for DCI transmission Channel element (CCE).It can be defined as the PDCCHs of given user equipment according to polymerization grade by 1,2,4 or 8 CCE is transmitted.In addition, the given user equipment can perform blind decoding.It relies on associated with the blind decoding of the given user equipment DCI format (as downlink DCI format 1/1B/1D/2/2A/2B/2C and the DCI format 4 for uplink) Transmission mode (TM) can be determined according to PCSCH transmission modes (TM) and PUSCH transmission pattern (TM).Here, the PDSCH The TM and PUSCH TM can (such as each transmission/receiving point and/or each user set according to transmission/receiving point and user equipment Tx/Rx number of antennas in standby) ability and the user equipment and the transmission/receiving point between channel status by higher Signal deployment.It therefore, can be according to the corresponding TM of dependence DCI format and/or spare DCI format (such as DCI format 0/1A) in UE The blind decoding number in this gives user equipment and as determined by each polymerization grade (AL) is performed in dedicated search space (USS) The blind decoding of the same number of mesh.Here, which can be by the formula 1 that is defined as below by give user equipment associated with this The function of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI), time slot index and polymerization grade determines.
[formula 1]
Here, i=1 ..., L-1 and m '=m+M(L)·nCI·nCIRepresent multi-carrier indicator field value, and m= 0 ..., M(L)-1·M(L)Represent the candidate PDCCH numbers monitored in the space is given.L represents polymerization grade (AL), and The L ∈ { 1,2,4,8 } in UE dedicated search space.
In addition, Yk=(AYk-1) mod D, wherein, A=29827, D=65537, andIndicate without Number of time slot in line frame.
Therefore, can be to be configured to by the use according to the given user equipment of 3GPP LTE/LTE-A rel-8/9/10 The DCI format that family equipment receives performs blind decoding.Here, which can be in corresponding UE dedicated search space (USS) (i.e. needle The USS of user equipment is given to this) in the polymerization grade 1,2,4 and 8 it is each on perform.Especially the blind decoding can root It is performed 6,6,2 or 2 times according to the polymerization grade 1,2,4 or 8.That is, can be to rely on DCI format and spare DCI format The each of PDSCH TM perform 16 blind decodings, and therefore reach and be performed in total 32 times.Meanwhile it is set in given user In the case of PUSCH transmission pattern (TM) 2 is configured as, DCI format 4 can be directed to and further perform 16 blind decodings.Cause This, in this case, which can reach performs 48 times in total.
(or definition) by newly using in 3GPP LTE/LTE-A rel-11 is configured as in user equipment In the case that EPDCCH receives DCI, blind decoding can be defined as in the downlink subframe monitored in EPDCCH instead of original (i.e. the UE dedicated search of the EPDCCH is empty in EPDCCH USS by PDCCH USS (the UE dedicated search space of i.e. original PDCCH) Between) in perform.In addition, in this case, a EPDCCH set of K (k >=1) can be by higher RRC signaling together with as above institute The downlink subframe configurations for EPDCCH monitoring stated are confirmed as (being configured as leading to for respective user equipment Cross the user equipment that corresponding EPDCCH receives DCI) EPDCCH USS.Here, the maximum value of the K can be 2,3,4 and 6 in One.Each EPDCCH set can include PRB groups (such as N number of PRB, the wherein N be more than or equal to 1 and less than or equal to The natural number of the number of the associated PRB of the downlink bandwidth).
In addition, each EPDCCH set can be determined that distributed-type and localize one in type, and root It signals according to the determining type.
EPDCCH set can correspond to localization type or distributed-type according to EPDCCH transport-types.For local Change type and distributed-type, above-mentioned N all can be 2,4 or 8, it is and without being limited thereto.
Fig. 4 describes the two class EPDCCH transmission including localization EPDCCH transmission and distribution EPDCCH transmission.
Can EPDCCH be transmitted by corresponding PDSCH region.In this case, the transport-type of the EPDCCH can be right The localization EPDCCH transmission of Ying Yu as shown in figs 4 a and 4b and distribution EPDCCH transmission.Therefore, form ECCE's ECCE structures and resource element (RE) number can be different according to each EPDCCH transport-types.Alternatively, no matter EPDCCH Transmission it is similar how, the ECCE structures and resource element (RE) number of each ECCE can be identical.
Localization EPDCCH transmission as is shown in fig. 4 a can illustrate that an ECCE is located at and is transmitted in a resource Block is in (a such as PRB pair).Distribution EPDCCH transmission as shown in fig 4b can illustrate that an ECCE is located at and passes It is defeated at least two resource blocks in (such as at least two PRB pairs).
Meanwhile can be that a user equipment distributes a EPDCCH set of K (k >=1).In this case, due to each EPDCCH set belongs to distributed-type or localization type, therefore can be that a user equipment distributes KLA localization EPDCCH gathers and KDA distribution EPDCCH set.That is, KLAnd KDSummation can be K (KL+KD=K).In other words, K A EPDCCH set (or a set) can be classified as (i) KLA localization EPDCCH set (or one set) and (ii)KDA distribution EPDCCH set (or a set).Here, KLAnd KDMeet K=KL+KD。
However, no matter above-mentioned N, K, KLAnd KDValue how, the blind decoding sum of user equipment can be determined that with it is typical It is identical in (or original) system.It therefore, in the case of for given K EPDCCH set of EPDCCH user device configurations The blind decoding number of each polymerization grade (AL) performed in each EPDCCH set by respective user equipment can be determined. Furthermore it is possible to the blind decoding number of each polymerization grade (AL) determines each corresponding polymerization grade in being gathered according to corresponding EPDCCH (AL) the search space size needed for.
In exemplary radio communication system, the blind decoding with each polymerization grade (AL) can be determined according to blind decoding number Associated search space size.That is, in the case of PDCCH polymerization grades (AL) 1, blind decoding is defined as performing 6 times, and And therefore 6 CCE are configured with for the UE dedicated search space (USS) of the PDCCH polymerization grades (AL) 1.Similarly, for The USSs of PDCCH polymerization grades (AL) 2,4 and 8 is determined in the same manner.More specifically, in the case of PDCCH AL 2, it is blind Decoding is defined as performing 6 times, and is therefore configured with 12 (=2*6) a CCE for the USS of PDCCH AL 2.In PDCCH In the case of AL 4 and PDCCH AL 8, each corresponding blind decoding is defined as performing 2 times, and be therefore directed to PDCCH AL The USS of 4 and PDCCH AL 8 is each configured with 8 CCE and 16 CCE.
However, perhaps the size of EPDCCH set is very likely to be determined to be greater than the usual institute of each polymerization grade (AL) The search space size needed.Therefore, it is more than in the size of EPDCCH set every based on will be performed in corresponding EPDCCH polymerizations In the case of the search space size that the blind decoding number of a polymerization grade (AL) determines, it may be necessary to polymerize in corresponding EPDCCH Defined in each polymerization grade (AL) search space configuration.
It is configured as receiving downlink by EPDCCH corresponding with the downlink control channel newly used in user equipment In the case of link control message (DCI), the present embodiment can provide for gather for user equipment in a corresponding EPDCCH (or A plurality of EPDCCH set) in each polymerization grade (AL) method and apparatus for performing blind decoding.Specifically, the present embodiment can With provide for be configured for respective user equipment each EPDCCH set in configuration will be monitored by respective user equipment it is every The method and apparatus of the search space of a polymerization grade (AL).
As described above, it is configured as receiving down link control information (DCI) feelings by EPDCCH in given user equipment Can be a EPDCCH set of user device configuration K (k >=1) (or a set) under condition.In this case, each EPDCCH set can include PRB groups (i.e. N number of PRB).In addition, in the case of each EPDCCH gathers, corresponding EPDCCH collection The type of conjunction can be determined that distributed-type or localization type.In other words, it is the K of EPDCCH user device configurations EPDCCH set (or a set) can be configured with (i) KLA localization EPDCCH set (or a set) and (ii) KDA distribution EPDCCH set (or a set).Here, which represents sets using the user of EPDCCH It is standby.KLAnd KDMeet K=KL+KD。
No matter the appearance of subframe type, cyclic prefix (CP) length and other physical signals, each localization or distribution The PRB included in formula EPDCCH set can be configured with 16 EREG in total in corresponding PRB pair, and (such as EREG#0 is extremely EREG#15)。
It, can be including in total 16 in a PRB pair of each EPDCCH set in the case of the EREG/ECCE newly defined A EREG (such as EREG#0 to EREG#15).Specifically, regardless of (i) frame structure type, (ii) sub-frame configuration, (iii) cyclic prefix (CP) whether length, the size of (iv) original PDCCH control areas and/or (v) have the other reference signals for not including DM-RS (such as CRS, CSI-RS, PRS), a PRB pair can include 16 EREG in total.
More specifically, in the case of general cyclic prefix (CP), a PRB pair in some EPDCCH set can wrap Include 168 resource elements (RE) (such as 12*14=168RE) in total.In such a case, it is possible to do not include from this 168 moneys The surplus resources element (RE) (such as 144 RE) of 24 resource elements (RE) of the DM-RS of source element (RE) performs EREG indexes. That is, can 16 numbers (such as 0,1,2 ... be used according to frequency priority scheme (i.e. first frequency and the later mode of time) 15) the EREG indexes are performed.Therefore, respective resources element (RE) can be numbered and (indexed) from 0 to 15.Similarly, In the case of extended cyclic prefix (CP), a PRB pair in some EPDCCH set can include 144 resource elements in total Plain (RE) (such as 12*12=144RE).In such a case, it is possible to for from 144 resource elements (RE) include for The surplus resources element (RE) (such as 128 RE) of 16 resource elements (RE) of DM-RS performs EREG indexes.It that is, can By performed according to frequency priority scheme (i.e. first frequency and in a manner of the time later) using 16 numbers (such as 0,1,2 ... 15) should EREG indexes.Therefore, respective resources element (RE) can be numbered and (indexed) from 0 to 15.
In the downlink subframe corresponding to general cyclic prefix (CP) (common DL subframe), it will be retouched with reference to Fig. 5 to Fig. 7 State embodiment associated with the EREG Index process for a PRB pair in some EPDCCH set.In Fig. 5 to Fig. 7, The resource element (RE) for DS-RS can be represented, and with the abnormal broken line of number without digital abnormal broken line part Part or grid pattern part can represent the resource element (RE) transmitted for CRS.
Fig. 5 is described according to the physics that EREG Index process is indexed in the case of a transmission antenna port (CRS ports 0) Resource block (PRB) to resource element (RE) map.Fig. 6 is described according to two transmission antenna ports (CRS ports 0 and 1) feelings The RE mappings for the PRB pair that EREG Index process is indexed under condition.Fig. 7 describe according to four transmission antenna ports (CRS ports 0, 1st, 2 and 3) in the case of the PRB pair that is indexed of EREG Index process RE mappings.
Referring to Fig. 5 to Fig. 7, EREG can be according to frequency priority scheme (i.e. frequency preferential and the mode of time later) quilt It is numbered and (indexes) from 0 to 15.It, can be inclined in the cycle for being not based on symbol in Fig. 5 to embodiment shown in fig. 7 Index is performed in the case of shifting.More specifically, as shown in figure 5, when resource element (RE) quilt indicated in first symbol with 500 It indexes as after 11 (indexing 11), index is continued as 12 (indexing 12) with the RE of 510 instructions in second symbol.Here, The RE (510) and the RE (500) for being indexed as 11 for being indexed as 12 (RE (510) for corresponding to next round) is non-conterminous. In same way, after 7 (indexing 7) is indexed as with the RE of 520 instructions in second symbol, used in the third symbol The RE of 530 instructions continues index as 8 (indexing 8).Here, it is indexed as being somebody's turn to do for 8 (RE (530) for corresponding to next round) RE (530) and the RE (520) for being indexed as 7 are non-conterminous.
In Fig. 5 to Fig. 7, the RE with same index can be grouped into an EREG.Therefore, in a PRB pair In the case of, 16 EREG (such as EREG#0 to EREG#15) can be distributed in total.Fig. 5 to Fig. 7 is described with having common CP The associated embodiment of PRB pair.That is, a PRB pair with the common CP can include 16 EREG in total.It is similar Ground even if in the case of a PRB pair with extension CP, can distribute 16 EREG (such as EREG#0 to EREG# in total 15).That is, a PRB pair with extension CP can include 16 EREG in total.
It can include M according to subframe type and CP length corresponding to each ECCE of EPDCCH transmission basic units EREG.More specifically, the M values can determine it is as follows.
In at least one embodiment, at (i) there is the common subframe of common CP and (ii) to be configured with special subframe 3rd, 4 or 8 and common CP special subframe in the case of, which can be determined that 4 (M=4).In other words, in this feelings Under condition, if including 16 EREG in a PRB pair, then 4 ECCE can be configured in total because each ECCE is by 4 EREG is formed.
In other embodiments, (i) have extension CP common subframe and (ii) have special subframe configuration 1,2, 6th, 7 or 9 and common CP special subframe and (iii) have special subframe be configured 1,2,3,5 or 6 and extend CP spy In the case of different subframe, which can be determined that 8 (M=8).In other words, in this case, if in a PRB pair Include 16 EREG, then 2 ECCE can be configured in total because each ECCE is made of 8 EREG.
Therefore, according to associated with EPDCCH set, downlink subframe type, cyclic prefix (CP) length etc. PRB sizes (i.e. N values, such as the value of PRB), the EPDCCH set formed to give user equipment can be configured with (i) 2N ECCE (in the case where an ECCE is made of 8 EREG) or (ii) 4N ECCE are (in an ECCE by 4 EREG groups In the case of).
In addition, user equipment can be configured as monitoring EPDCCH.For when the RE's for being used for possible EPDCCH transmission Number is less than threshold value (Xthresh) when common subframe and common CP and for as the RE that be used for possible EPDCCH transmission Number be less than threshold value (Xthresh) (hereinafter referred to example 1) when there is special subframe 3,4 or 8 and common CP is configured Special subframe, localization EPDCCH set, which can be defined as, supports polymerization grade 2,4,8 and 16, and distribution EPDCCH can To be defined as supporting polymerization grade 2,4,8,16 and 32.
Otherwise (hereinafter referred to example 2), localization EPDCCH set, which can be defined as, supports 1,2,4 and of polymerization grade 8, and distribution EPDCCH can be defined as and support polymerization grade 1,2,4,8 and 16.
As described above, no matter the EPDCCH number of sets (K) of (i) for respective user equipment configuration, (ii) are each corresponding The polymerization grade supported in EPDCCH aggregate types and (iii) corresponding EPDCCH set, performs in respective user equipment Blind decoding trial sum may need identical in typical (or existing) user equipment.Therefore, according to above-mentioned PUSCH transmission The blind decoding that pattern (TM) performs in respective user equipment, which attempts sum, may need to be 32 or 48.
The present embodiment can be provided in be polymerize according to EPDCCH of the EPDCCH design standards for the given user device configuration In be given user equipment the blind decoding method and apparatus that determine search space.More specifically, the present embodiment can provide use In the method and apparatus for determining search space, which is based on each polymerization grade and gives user equipment in search sky by this Between middle execution.In other words, in the present embodiment, (such as corresponded to according to PRB sizes associated with an EPDCCH set The N values of PRB numbers), the downlink subframe type that is configured with corresponding EPDCCH set, cyclic prefix (CP) length etc., EPDCCH polymerizations can be configured with (i) 2N ECCE (such as ECCE#0 to ECCE# (2N-1)) or (ii) 4N ECCE is (such as ECCE#0 to ECCE# (4N-1)).Hereinafter, the sum of ECCE can be referred to as NECCE.Statement ECCE# represents corresponding ECCE Index.
Fig. 8 is to describe to be configured in the EPDCCH UE dedicated search space of transmission/receiving point according at least one embodiment The flow chart of the method for downlink control channel in data area.
Referring to Fig. 8, which can perform special positioned at EPDCCH UE according to the configuration of at least one embodiment The method (800) of the downlink control channel in data area in search space.More specifically, this method (800) can (or definition) is configured in EPDCCHUE dedicated search space corresponding to the basic transmission of EPDCCH in step S810 to include (i) The ECCE of unit and (ii) in step S820 by the EPDCCH to user device transmissions in the EPDCCH UE dedicated search The ECCE of configuration (or definition) in space.
More specifically, in step S810, the transmission/receiving point can defined in EPDCCH UE dedicated search space (or Formed) corresponding to EPDCCH BTU Basic Transmission Unit ECCE.Here, which, which can be located in subframe, forms K The N number of resource block of each of EPDCCH set is in the data area of (such as PRB pair).Each EPDCCH set can include N A resource block is to (such as PRB pair).The K and N may be greater than or the natural number equal to 1.As described above, each PRB pair can wrap 16 EREG are included, and each ECCE can include 4 or 8 EREG.
Referring back to step S810, which can use (i) recessive allocation plan, (ii) dominant configuration side One in case and (iii) mixed configuration scheme, determine search space start offset (referred to herein as ECCE start offsets). Hereinafter, each of the allocation plan will be described in further detail.For example, in the case of recessive allocation plan, the transmission/connect Sink can use the radio network temporary identifier (RNTI) of (i) user equipment, (ii) subframe index, (iii) polymerization grade, with And (iv) included in EPDCCH gather in ECCE sums function defined in EPDCCH UE dedicated search space (or Formed) ECCE.
In the operation (S810) for forming (or definition) ECCE, it is will be in polymerization grade that ECCE, which can form (or definition), The number of monitoring operation performed in unit (i.e. in the ECCE number units corresponding to polymerization grade) based on corresponding polymerization grade It is continuous in mesh.Alternatively, ECCE can be formed as being discrete in polymerization grade unit.Specifically, it is being distributed In the case of formula EPDCCH gathers and/or localization EPDCCH gathers, ECCE can be continuous.Meanwhile in distribution In the case of EPDCCH gathers and/or localization EPDCCH gathers, ECCE can be discrete.Here, the term is " continuous " and " discrete " may not necessarily so mean " physics is continuous " and " physics is discrete ".That is, these terms can be packet Include the concept that logic is continuous/discrete and physics is continuous/discrete.
It as it is explained in detail hereinafter, can be by (i) corresponding EPDCCH set to the associated ECCE jump values of discontinuous ECCE ECCE sums, (ii) polymerization grade and (iii) are by the candidate EPDCCH numbers based on corresponding polymerization grade by user equipment monitors The function definition of mesh (i.e. EPDCCH interfaces are candidate).
Meanwhile in the case where the user equipment is configured with multi-carrier indicator field, the multi-carrier indicator field Value can be applied to define the function of the ECCE.
In addition, the transport-type of EPDCCH set can correspond to localization EPDCCH transmission and distribution EPDCCH transmission One of.The polymerization grade can be selected as one of 1,2,4,8,16 and 32.For as the RE for being used for possible EPDCCH transmission Number be less than threshold value (Xthresh) when common subframe and common CP and for when being used for possible EPDCCH transmission The number of RE is less than threshold value (Xthresh) (hereinafter referred to example 1) when there is special subframe configuration 3,4 or 8 and common CP Special subframe, localization EPDCCH set, which can be defined as, supports polymerization grade 2,4,8 and 16, and distribution EPDCCH It can be defined as and support polymerization grade 2,4,8,16 and 32.Otherwise (hereinafter referred to example 2), localization EPDCCH set can Be defined as support polymerization grade 1,2,4 and 8, and distribution EPDCCH can be defined as support polymerization grade 1,2,4, 8 and 16.
In step S820, which can be special in the EPDCCH UE to the user device transmissions by EPDCCH With the ECCE that (or definition) is formed in search space.
So far, it describes to be configured in transmission/receiving point according at least one embodiment with reference to Fig. 8 and is located at EPDCCH UE The method of the downlink control channel in data area in dedicated search space.Hereinafter, be more fully described with It puts and the method for search space start offset (ECCE start offsets) is determined in the operation (S810) of ECCE and for follow-up blind decoding Attempt the associated embodiment of method of determining ECCE indexes.
<1. search space start offset (ECCE start offsets)>
Embodiment 1：Dominant configuration
In the case where forming EPDCCH set for given user equipment, in corresponding EPDCCH set by the user The search space start offset value for the blind decoding that equipment carries out can be signaled by higher.In other words, for EPDCCH user In the case that equipment forms EPDCCH set, ECCE start offsets value can be by being used to form the dynamic or more of corresponding EPDCCH set High-level signaling (such as higher RRC signaling) signals.I.e. the ECCE start offset values may be embodied in wireless heterogeneous networks (RRC) In message.In addition, in this case, which can form the PRB groups of EPDCCH set together with (i) The transmission type information of (i.e. N number of PRB) configuration information and (ii) EPDCCH set is (such as localization type or distributed class Type) it is signalled.Here, which can indicate the 2N gathered in the formation corresponding EPDCCH The starting ECCE monitored in the ECCSs or 4N ECCSs by the user equipment in each polymerization grade.
In this case, the blind decoding process of respective user equipment can monitor subframe from corresponding in all EPDCCH In determine ECCE start offset values ECCE indexes execution.
In the example (the first example) for determining ECCE start offset values, when EPDCCH set is configured, it will be applied to The ECCE start offset values (ECCE of all polymerization grades supported by corresponding EPDCCH setoffset) can be determined, and And respective user equipment is transferred to by higher level signaling.In this case, which can originate identical ECCE All polymerization grades that the blind decoding that deviant is applied in gathering for corresponding EPDCCH defines.That is, gather in some EPDCCH In the case of being configured with 2N ECCE or 4N ECCE, ECCEoffsetCan be as depicted in figure 9 be confirmed as N and send out Signal is (in NECCEIn the case of=4N).Here, which can include ECCE#0 to ECCE# (2N-1), and the 4N A ECCE can include ECCE#0 to ECCEoffsetECCE#(4N-1).In this case, respective user equipment can be by phase Same ECCEoffsetAll polymerization grades (AL) that the blind decoding that (such as ECCE#N) is applied in gathering for corresponding EPDCCH defines. Therefore, in this case, which can be in all polymerization grades (AL) since ECCE#N.
In another example (the second example) for determining ECCE start offset values, the ECCE start offsets value can by Each polymerization grade (AL) that corresponding EPDCCH set is supported is individually determined, and from higher level signaling to respective user equipment Transmission.In other words, in the case where some EPDCCH set is formed to support X polymerization grade, ECCE start offset values It can distinguish and determine in each polymerization grade (AL), and be transmitted from higher level signaling to respective user equipment.Here, each The different ECCE start offsets values that polymerization grade determines can be expressed as ECCEoffset,1、ECCEoffset,2... and ECCEoffset,x.In this case, respective user equipment can be by different ECCE start offsets values (i.e. in each polymerization etc. The ECCE start offsets value that grade is individually determined) it is applied to each polymerization grade defined in corresponding EPDCCH set for blind decoding (AL).Therefore, in this case, which can be from corresponding to the ECCE being individually determined in each polymerization grade (AL) The ECCE indexes of beginning deviant start.
For example, in the case where forming localization EPDCCH set, if associated with the blind decoding of user equipment poly- It closes grade (AL) and is defined as 1,2 and 4, then for three ECCE start offset values (such as ECCE of the user equipmentoffset,1、, ECCEoffset,2And ECCEoffset,3) can be determined.Therefore, in the case of polymerization grade (AL) 1, by respective user equipment The blind decoding of execution can be from corresponding to ECCEoffset,1ECCE indexes start.Similarly, in the situation of polymerization grade (AL) 2 In, the corresponding blind decoding performed by respective user equipment can be from corresponding to ECCEoffset,2ECCE indexes start.In polymerization etc. In the case of grade (AL) 4, the corresponding blind decoding performed by respective user equipment can be from corresponding to ECCEoffset,3ECCE indexes Start.
Embodiment 2：Recessiveness configuration
Typically, it can define in each polymerization grade of user equipment that UE is special to be searched in original (or typical) PDCCH Rope space (USS).The ECCE of blind decoding is performed in the EPDCCH set formed by respective user equipment in each user equipment Index start offset can be defined with being similar to the mode of the typical scenario.More specifically, the ECCE index start offsets can To be defined as the RNTI of (i) respective user equipment, (ii) subframe index is (such asWherein nsFor time slot index (i.e. The time-gap number in radio frames)), the size of (iii) polymerization grade (AL) and (iv) corresponding EPDCCH set is (i.e. Number (the N of ECCEECCE), such as 2N or 4N) function.
In more detail, search space start offset (i.e. ECCE start offsets) can be with indicating positions, for the user equipment Formed some EPDCCH set in since the position respective user equipment blind decoding.The search space start offset is (i.e. ECCE start offsets) it can be defined as the function of above-mentioned parameter.For example, the search space start offset can be by following public affairs Formula 2 defines.
[formula 2]
ECCEoffset=f (RNTI, subframe index, AL, NECCE)
In formula 2, NECCERepresent ECCE in total.Furthermore it is possible to it is based on and the associated PRB of corresponding EPDCCH set Size (i.e. N values, for example form the PRB numbers of an EPDCCH set) and the EREG numbers (M) of one ECCE of formation determine NECCE。
In at least one embodiment, it can reuse and determine the special PDCCH monitoring candidates' of UE in original PDCCH Function, i.e., the function defined by above formula 1.However, in this case, it is right according to the PDCCH sizes in corresponding subframe ECCE sums (the N that should gather in corresponding EPDCCHECCE) 2N or 4N can be used instead of CCE sums (NCCE, k)。
Embodiment 3：Mixed configuration
It can correspond to be configured with reference to recessiveness according to the method that embodiment 3 determines ECCE start offsets mixed with dominant configuration Close type.First, the ECCE start offsets value of each EPDCCH set can be according to embodiment 1 by determining ECCE start offsets Method determines, and is transmitted from higher level signaling to respective user equipment.However, based on the downlink for transmitting corresponding EPDCCH The index of subframe, the user equipment can use different ECCE start offsets (i.e. with the ECCE that is signaled by higher The different ECCE start offsets of beginning deviant).That is, by being used in corresponding EPDCCH set by respective user equipment ECCE start offsets value can be determined based on following function：(i) it is somebody's turn to do by higher level signaling for what the respective user equipment determined ECCE start offsets value (referred to herein as with the ECCE start offsets value of explicit signaling) and (ii) the downlink frame index. Therefore, identical ECCE start offsets value will not be applied to all downlink subframes of transmission EPDCCH.That is, by every A downlink subframe performs the jump of ECCE start offsets value, and the search space which can be always identical provides phase The diversity effect answered.
Alternatively, the search space start offset value (i.e. ECCE start offsets value) of practical application can be based on parameter If (i) is with the ECCE start offset values of explicit signaling, (ii) downlink frame index and (iii) respective user equipment RNTI is obtained.That is, by can be determined by the EPDCCH search spaces of user equipment monitors based on following function： (i) the search space start offset value (the ECCE start offsets value determined by explicit signaling) determined by higher level signaling, (ii) downlink frame index and the RNTI of (iii) respective user equipment.Here, which can generation Some EPDCCH that table will be formed by respective user equipment in EPDCCH monitors downlink subframe for the respective user equipment The search space monitored in set.It alternatively, can be with by monitored search space start offset (i.e. ECCE start offsets) It is determined based on following function：(i) signaling parameter (the search space start offset value such as determined by higher level signaling), under (ii) The size of downlink subframe frame index and (iii) EPDCCH set.
So far, determining search space start offset (i.e. ECCE start offsets) is described according to embodiment 1 to embodiment 3 Method.Hereinafter, embodiment associated with the method that determining ECCE indexes are attempted for follow-up blind decoding will be described in further detail.
<2.ECCE jumps>
Given EPDCCH user equipmenies can perform blind decoding from the ECCE indexes corresponding to ECCE start offset values.This In, according to the above embodiments 1 to embodiment 3 the ECCE start offset values can be determined in each polymerization grade (AL).It can be with The polymerization grade (AL) is defined for the blind decoding in the EPDCCH set formed for respective user equipment.It meanwhile will be at some The number for the blind decoding that polymerization grade (AL) performs can be plural number.It that is, will be in some polymerization grade (AL) by relative users Candidate EPDCCH (i.e. EPDCCH monitoring is candidate) number of equipment monitor can be plural number.In this case, in the first blind solution Code performs follow-up blind decoding ECCE indexes after attempting may need to be defined.Here, first blind decoding attempt with it is upper Stating ECCE start offsets is associated.
The present embodiment can be provided as follow-up blind decoding and attempt a determining ECCE index (or a plurality of ECCE indexes) Method.More specifically, the present embodiment can provide the method for the blind decoding that sequence performs continuous ECCE and be tasted according to blind decoding The method that examination performs ECCE jumps.
Embodiment 4：Continuous ECCE
According to embodiment 4, the blind decoding of continuous ECCE can be sequentially performed.As described above, to give user equipment shape Into EPDCCH monitoring downlink subframes corresponding EPDCCH set in the ECCE start offset values of each polymerization grade can To be determined according to embodiment 1 to embodiment 3.It, can be with when the ECCE start offsets value is determined according to embodiment 1 to embodiment 3 Using the method for the above-mentioned blind decoding that continuous ECCE is performed according to the sequence of embodiment 4.More specifically, when the ECCE start offsets When value is determined according to embodiment 1 to embodiment 3, user equipment can be that L*T continuous ECCE in EPDCCH set are performed EPDCCH monitors (i.e. blind decoding).Here, L represents the size of corresponding polymerization grade (AL), and T represents determining blind decoding number Mesh.The L*T continuous ECCE can be since corresponding ECCE start offsets value.Specifically, being somebody's turn to do for a continuous ECCE of L*T EPDCCH monitoring can perform in the unit of L CCE (i.e. in the unit of L CCE).That is, based on by corresponding The number of blind decoding that the corresponding polymerization grade (having size L) that EPDCCH set is supported performs is set as T and according to implementation The ECCE start offsets value that example 1 to embodiment 3 determines is offsetLIn the case of, respective user equipment, which can perform, to be corresponded to ECCE#offsetLUntil ECCE# (offsetL+ L*T-1) ECCE blind decoding.Specifically, in this case, the blind solution Code can perform in L ECCE unit.
For example, some localization EPDCCH set of given user equipment can be configured with continuous 8 PRB.In basis In the case that the number of the EREG of one ECCE of above-mentioned standard formation is 4, localization EPDCCH set can be configured with total Totally 32 (=8*4) a ECCE.In addition, will be held in corresponding EPDCCH set by respective user equipment in polymerization grade (AL) 2 The number of capable blind decoding is defined as 6 and ECCE start offsets value as in the case of 16, which can continue blind Decode (i) ECCE#18 and ECCE#19, (ii) ECCE#20 and ECCE#21, (iii) ECCE#22 and ECCE#23, (iv) ECCE# 24 and ECCE#25 and (v) ECCE#26 and ECCE#27.
However, in this case, if corresponding (offsetL+ L*T) value be more than to form corresponding EPDCCH set Sum (the N of ECCEECCE=2N or 4N), then it can be from corresponding to the search space that will be performed by respective user equipment ECCE#0 cycles perform corresponding blind decoding.That is, it is configured with (offsetL+L*T-NECCE) search space of a ECCE can To be defined as ECCE#0 to ECCE# (offsetL+L*T-NECCE-1)。
Embodiment 5：ECCE jumps
According to another method for forming search space for blind decoding by user equipment, using the EPDCCH of follow-up blind decoding Monitoring candidate (referred to herein as candidate EPDCCH) can determine (or definition) in each polymerization grade (AL) in EPDCCH set. Here, which can represent to continue to execute after ECCE associated with ECCE start offsets is by blind decoding Next blind decoding.The ECCE start offsets can be determined according to above-described embodiment 1 to embodiment 3.Specifically, it is follow-up with this The associated EPDCCH monitoring candidate of blind decoding can be determined by the ECCE of jump constant, numbers.In other words, it will be based on (i.e. EPDCCH is monitored the number of blind decoding that the corresponding polymerization grade (having size L) supported by corresponding EPDCCH set performs Candidate number) it is set as T and ECCE start offset values and is confirmed as offsetLIn the case of, it can use as follows ECCH jumping parameters (H) definition forms the ECCE indexes of T EPDCCH search space based on corresponding polymerization grade (AL).
[formula 3]
In (p+1) a search space of polymerization grade (L)：ECCE#(offsetL+ p*H) to ECCE# (offsetL+p*H + L-1), for the T-1 of p=0,1,2 ...
That is, behind the first search space of blind decoding, can ECCE# (offset be included with blind decodingL+ H) to ECCE# (offsetL+ H+L-1) the second search space.Here it is possible to second search space is determined according to ECCE jump values (H).Separately Outside, can { ECCE# (offset be included with blind decodingL+ 2H) to ECCE# (offsetL+2H+L-1)}…{ECCE#(offsetL+ (T-1) H) to ECCE# (offsetL+ (T-1) H+L-1) } T search space in it is each.In this case, such as fruit shape ECCE index values into some (n+1) a search spaces p=n (i.e. when) are more than the ECCE for forming corresponding EPDCCH set Sum (i.e. NECCE) so such as the situation of continuous ECCE described in embodiment 4, corresponding decoding process can loop back to The ECCE#0 of the first ECCE gathered corresponding to the corresponding EPDCCH.Therefore, in this case, corresponding search space (i.e. should (n+1) a search space) it can be distributed from ECCE#0.
However, in the case where cyclic shift is applied to determine that EPDCCH monitoring is candidate, it may occur however that form (n at (i) + 1) a EPDCCH monitors that the candidate ECCE of candidate and corresponding follow-up EPDCCH monitoring and (ii) formation (n+1) are a Overlapping between the ECCE of the previous EPDCCH monitoring candidates of EPDCCH monitoring candidate (i.e. as p=n).Therefore, Ke Yitong It crosses to perform and be shifted with the ECCE of the size of corresponding polymerization grade (L) as many, determine that EPDCCH monitors candidate collection, thus keep away The overlapping is exempted from.In other words, if above formula 3 in offsetL+n*H>NECCE(for p=n), for searching for p=n Rope space can be defined by equation 4 below.
[formula 4]
In (p+1) a search space of polymerization grade (L)：ECCE#(offsetL+p*H-NECCE+ L) to ECCE# (offsetL+p*H-NECCE+ 2L-1), for p=n
In formula 4, the T-1 of p=0,1,2 ..., and offsetL+n*H≥NECCE
Above description is concluded in the case of p=n, corresponding search space can be directed to and perform m ECCE cyclic shift.Cause This, which can be shifted mL by the ECCE cyclic shifts.I.e. if offset in equation 3 aboveL+n* H≥mNECCE, then it can be defined for the search space of p=n by following formula 5.
[formula 5]
In (p+1) a search space of polymerization grade (L)：ECCE#(offsetL+p*H-mNECCE+ mL) to ECCE# (offsetL+p*H-m NECCE+ mL+L-1), for p=n
In formula 5, n=0,1,2 ..., T-1, and offsetL+n*H≥mNECCE(m=0,1,2,3 ...).
Alternatively, it in the case of application cyclic shift, does not need to unconditionally perform and the size of polymerization grade (L) ECCE displacements as many.That is, only occur to monitor that candidate ECCE's is overlapping with corresponding to the previous EPDCCH, It is likely to perform and be shifted with the ECCE of the size of polymerization grade (L) as many.
Side identical in dominant configuration (or determining) method with the search space start offset according to embodiment 2 can be used Formula performs the method for determining ECCE jump values (H).More specifically, in the case where forming EPDCCH set, it can be by higher Signaling is to the corresponding ECCE jump values (H) of user device transmissions.In this way, the corresponding ECCE jump values (H) included in for In the case of in the higher level signaling of EPDCCH set configurations, it can gather in each EPDCCH and determine individual H values.Therefore, In this case, identical H values can be applied to all polymerization grades being defined in corresponding EPDCCH set.Alternatively Ground, H values can be individually determined, and transmitted by higher in each polymerization grade (AL) in being defined on corresponding EPDCCH set Number.
In other embodiments, corresponding H values (i.e. corresponding jump value) can be based on the big of (i) corresponding EPDCCH set Small, (ii) forms the number of the EREG of an above-mentioned ECCE and/or (iii) polymerization grade (AL) size is determined by recessiveness, and It is without being limited thereto.For example, H values can be determined that (i) NECCE, i.e., the number of the ECCE included in a PRB and (ii) are poly- Close the maximum value in grade (AL) size (L).Here, in the case where forming the number of EREG of an ECCE and being referred to as E, packet It is contained in number (the i.e. N of the ECCE in a PRBECCE) it can correspond to 16/E.That is, H values can be byReally It is fixed.Here, the common subframe of (i) with common CP and (ii) with special subframe be configured 3,4 or 8 and common CP it is special In the case of subframe, which can be 4 (E=4).(i) have special subframe be configured 1,2,6,7 or 9 and common CP it is special There is the common subframe of extension CP and (iii) there is special subframe to be configured 1,2,3,5 or 6 and extend the spy of CP by subframe, (ii) In the case of different subframe, which can be 8 (E=8).
In other embodiments, corresponding H values (i.e. corresponding jump value) can be based on including (i) corresponding EPDCCH set Size (the N values such as when EPDCCH set is configured with one group of N number of PRB), (ii) T values will be corresponding (i.e. EPDCCH monitoring is candidate for the number for the blind decoding being performed in EPDCCH set based on corresponding polymerization grade (having size L) Number), (iii) polymerization grade (AL) size L and (iv) E values, that is, formed an ECCE EREG value at least it One function is determined by recessiveness.For example, the corresponding EPDCCH collection based on corresponding polymerization grade by user equipment monitors can be used The function of the sum of the ECCE of conjunction, polymerization grade and/or candidate's EPDCCH numbers determines the ECCE jump values of discontinuous ECCE, and It is and without being limited thereto.More specifically, when the sum of the corresponding EPDCCH ECCE gathered is by polymerization grade and based on corresponding polymerization etc. When grade is removed by the product of the candidate EPDCCH numbers of user equipment monitors, it can determine discontinuous ECCE's by the function of operating value ECCE jump values.
In such a case, it is possible to corresponding ECCE jump values (H) are determined by equation 6 below or formula 7.Here, [X] is represented Maximum integer no more than X.
[formula 6]
H=max (ab, L), wherein a=max (1, [N/T]) and b=16/E
[formula 7]
H=max (ab, L), wherein a=[N/T] and b=16/E
When being configured with EPDCCH set, H=max (or jumping parameters) can be signaled by higher.Here, H=max can To be called h for short.It meanwhile can be by the jumping parameters (h) that signal and/or other by the ECCE jump values (H) of practical application Recessive parameter (such as polymerization grade size (L), EPDCCH set sizes (N or NECCE(=2N or 4N)) etc.) function determine.Than Such as, the jump value (such as H=max (h, L)) of each polymerization grade (AG) is determined according to the h values signaled for respective user equipment Mixed configuration method may be embodied in the range of the present embodiment.
In other embodiments, the situation of the user equipment of cross-carrier scheduling is activated in carrier aggregation (CA) user equipment In, can individually distributing (or determining) above-mentioned search space start offset value in each respective component carrier wave (CC), (i.e. ECCE rises Beginning deviant).That is, different search spaces start offset value can be signalled at each component carrier (CC).Another In one embodiment, the carrier index value of each component carrier (CC) can be applied to generation (or determining) search space starting The above-mentioned function of deviant.Here, which can correspond to the multi-carrier indicator field applied to scheduling authorization (CIF) value.Alternatively, in the case where monitoring EPDCCH (i.e. based on some polymerization grade (AL) in EPDCCH set In the case of performing blind decoding), search space can be continuously configured or be passed through ECCE according to above-described embodiment 4 or embodiment 5 Hop configurations.Specifically, in these cases, main plot (P may be usedcell) search space and time cell (Scell) search Rope space is to increase CIF.That is, employing main plot (Pcell) search space after, time cell may be used (Scell) search space.
It in the present embodiment, can be as described above in EPDCCH set to perform EPDCCH monitoring operations (i.e. blind decoding) User equipment determine that EPDCCH monitoring is candidate (i.e. search space).Specifically, it is in the present embodiment, it is possible to real by combining (i) Apply all EPDCCH prisons that example 1 at least one of embodiment 3 and at least one of (ii) embodiment 4 and embodiment 5 embodies It can be applied depending on the determining method (i.e. all search spaces determine method) of candidate.
In other embodiments, (i) search space start offset value (i.e. ECCE start offsets value) can be straight by higher It connects and having to explicitly signals or (ii) is for determining that the parameter of search space start offset value can be by according to mixed configuration scheme Higher is signaled.In this case, ECCE jump values (H) and/or relevant parameter can be further signalled.Namely Say, ECCE start offsets parameter corresponding to the search space configuration parameter that given user equipment is directed in gathering in EPDCCH and ECCE jump relevant parameters can be signalled.In this case, after the allocation list determined for parameter is defined, often The configuration index of application can be signalled by a EPDCCH set.Search space allocation list can be in each EPDCCH types quilt Definition.Therefore, which can be used for including (i) for localizing the allocation list of EPDCCH set and (ii) The allocation list of distributed EPDCCH set.Alternatively, search space allocation list can be based on (i) EPDCCH set size or (ii) number for forming the EREG of an ECCE is defined.Specifically, search space configuration is defined in the number (E) based on EREG In the case of table, two search space allocation lists can be defined (such as the allocation list of E=4 and E=8).With based on allocation list Search space map associated all embodiments and be included in the range of the present embodiment.
In the case where user equipment is configured as receiving down link control information (DCI) by EPDCCH, this implementation Example can provide the method for receiving the DCI.
Figure 10 is to describe to receive the downlink control in data area in a user device according to other embodiments The flow chart of the method for channel.
Referring to Figure 10, which can perform the method for receiving the downlink control channel positioned at data area (1000).More specifically, in step S1010, the user equipment can by formed in subframe K EPDCCH gather it is each A N number of resource block receives EPDCCH to the data area of (such as PRB pair) from transmission/receiving point.Here, the K and N are greater than Or the natural number equal to 1.In step S1020, the user equipment is in EPDCCH UE dedicated search space according to downlink control Information (DCI) form processed can perform the EPDCCH that can be decoded in each EPDCCH set.
As described above, each PRB pair can include the resource element groups (EREG) of 16 enhancings.It is basic with EPDCCH transmission The corresponding control channel element (ECCE) each enhanced of unit can include 4 or 8 EREG.
More specifically, in step S1020, the user equipment can basis should in the EPDCCH UE dedicated search space Down link control information (DCI) form decodes the EPDCCH in each EPDCCH set.In such a case, it is possible to pass through Using as described above according to (i) dominant allocation plan of embodiment 1 to embodiment 3, (ii) recessiveness allocation plan and (iii) one in mixed configuration scheme forms (or definition) and the associated ECCE of EPDCCH decodings.For example, match in recessiveness , can be by the radio network temporary identifier (RNTI) of (i) user equipment in the case of putting scheme, (ii) subframe index, (iii) is poly- The function for closing the ECCE sums of grade and/or (iv) included in an EPDCCH set forms (or definition) ECCE.As above Described, the start offset of ECCE indexes for performing blind decoding by respective user equipment in EPDCCH set can be defined as (i) RNTI of respective user equipment, (ii) subframe index is (such asWherein nsIndexed for time slot), (iii) polymerization etc. Size (i.e. number (the N of ECCE of the corresponding EPDCCH set of grade (AL) and (iv)ECCE), such as 2N or 4N) function.This In, EPDCCH set can be formed in each user equipment.
In more detail, search space start offset (i.e. ECCE start offsets) can be with indicating positions, for the user equipment Formed some EPDCCH set in since the position respective user equipment blind decoding.The search space start offset is (i.e. ECCE start offsets) it can be defined as the function of above-mentioned parameter.For example, the search space start offset can be by ECCEoffset =f (RNTI, subframe index, AL, NECCE) definition.
The function defined by above formula 1 can be reused, i.e., the special PDCCH monitoring of UE is determined in original PDCCH Candidate function.However, in this case, as described above, corresponding to ECCE according to the PDCCH sizes in corresponding subframe Sum (NECCE CCK,K) 2N or 4N.
Meanwhile in the operation (S1020) of decoding EPDCCH, user equipment can monitor and will be in polymerization grade unit The continuous ECCE of the number of monitoring operation based on the execution of corresponding polymerization grade as many.As described above, it is set for given user The ECCE start offsets of each polymerization grade in the standby corresponding EPDCCH set of EPDCCH monitoring downlink subframes formed Value can be determined according to embodiment 1 to embodiment 3.When the ECCE start offsets value is determined according to embodiment 1 to embodiment 3, The method that the blind decoding that continuous ECCE is performed according to the sequence of above-described embodiment 4 can be applied.More specifically, when the ECCE is originated When deviant is determined according to embodiment 1 to embodiment 3, user equipment can be in EPDCCH set for L*T continuous ECCE Perform EPDCCH monitoring operations (i.e. blind decoding).Here, L represents the size of corresponding polymerization grade (AL), and T represents what is determined Blind decoding number.The L*T continuous ECCE can be since corresponding ECCE start offsets value.Specifically, it is continuous for L*T The EPDCCH monitoring of ECCE can perform in the unit of L CCE.
Meanwhile in the operation (S1020) of decoding EPDCCH, what user equipment can be as described in Example 5 is gathering It closes and monitors discontinuous ECCE in level cells (in the unit corresponding to the number of the ECCE of polymerization grade).In such case Under, the ECCE jump values of discontinuous ECCE can be determined by following function：(i) ECCE being contained in corresponding EPDCCH set Sum, the candidate EPDCCH numbers that (ii) polymerization grade and (iii) are monitored by the user equipment based on corresponding polymerization grade. As described above, according to being formed by another method of the search space of the user equipment blind decoding, using follow-up blind decoding EPDCCH monitoring is candidate to be determined (or definition) in each polymerization grade (AL) in EPDCCH set.Here, this is follow-up Blind decoding can represent the next blind solution that will be continued to execute after ECCE corresponding with ECCE start offsets is by blind decoding Code.The ECCE start offsets can be determined according to above-described embodiment 1 to embodiment 3.Specifically, it is associated with the follow-up blind decoding The EPDCCH monitoring candidate can be determined by the ECCE of jump constant, numbers.As described above, according to the determining search space of recessiveness Another method, which can be determined by following function：(i) N values, i.e. corresponding EPDCCH set size ( In the case that one EPDCCH set is configured with one group of N number of PRB), (ii) T values will perform in some EPDCCH set The blind decoding number (i.e. the candidate number of EPDCCH monitoring) in polymerization grade (AL) of blind decoding, (iii) L values, i.e. polymerization etc. The size of grade and/or (iv) E values form the number of the EREG of an ECCE.
Meanwhile in the case where the user equipment is configured with multi-carrier indicator field (CIF), the multi-carrier indicator The value of field (CIF) is applied to define the function of the ECCE of blind decoding.The carrier index of each component carrier (CC) (CI) function of generation deviant can be applied to.Here, which can be applied to scheduling authorization The value of multi-carrier indicator field (CIF).
Meanwhile can be that one of localization EPDCCH transmission and distribution EPDCCH transmission form EPDCCH set.It is poly- It closes grade and can correspond to one of 1,2,4,8,16 and 32.In addition, for when the number for the RE for being used for possible EPDCCH transmission Mesh is less than threshold value Xthresh(Xthresh) when common subframe and common CP and for when being used for possible EPDCCH transmission The number of RE is less than threshold value (Xthresh) (hereinafter referred to example 1) when there is special subframe configuration 3,4 or 8 and common CP Special subframe, localization EPDCCH set, which can be defined as, supports polymerization grade 2,4,8 and 16, and distribution EPDCCH It can be defined as and support polymerization grade 2,4,8,16 and 32.Otherwise (hereinafter referred to example 2), localization EPDCCH set can Be defined as support polymerization grade 1,2,4 and 8, and distribution EPDCCH can be defined as support polymerization grade 1,2,4, 8 and 16.
Figure 11 is the schematic diagram for describing the base station according to several embodiments.
Referring to Figure 11, base station 1100 can be including control processor 1110, transmitter according at least one embodiment 1120 and receiver 1130.Here, base station 1100 can be located at data for being configured in EPDCCH UE dedicated search space Transmission/receiving point of downlink control channel in region.
Control processor 1110 can control operation (the i.e. base station 1100 needed for performing the present embodiment described above Operation).Each it polymerize with the EPDCCH set formed for user equipment more specifically, control processor 1110 can be controlled The blind decoding of grade is associated to operate (i.e. the operation of base station 1100) here, under which is configured as by corresponding to The EPDCCH of Uplink Control Channel receives down link control information (DCI).
More specifically, that (or definition) can be formed in the EPDCCH UE dedicated search space is right for control processor 1110 It should be in the ECCE of the BTU Basic Transmission Unit of EPDCCH.Here, which can be located at forms K EPDCCH set in subframe In each N number of resource block in the data area of (such as PRB pair).The K and N is greater than or equal to 1 natural number.As above institute It states, each PRB pair can include 16 EREG, and each ECCE can include 4 or 8 EREG.
In addition, control processor 1110 can use (i) as described above recessive allocation plan, (ii) dominant configuration side One in case and (iii) mixed configuration scheme, determine search space start offset (i.e. ECCE start offsets).For example, In the case of recessive allocation plan, control processor 1110 can be by using the radio network temporary identifier of user equipment (RNTI), the function of the ECCE sums of the index of the subframe, polymerization grade and each EPDCCH set, in the EPDCCH UE (or definition) ECCE is formed in dedicated search space.
Transmitter 1120 and receiver 1130 can transmit and receive respectively the needs related with the user equipment for holding The signal, message and/or data of the above the present embodiment of row.For example, transmitter 1120 can be by EPDCCH to user equipment Transmission forms the ECCE of (or definition) in the EPDCCH UE dedicated search space.
Figure 12 is the schematic diagram for describing the user equipment according to several embodiments.
Referring to Figure 12, receiver 1210, control processor 1220 can be included according to the user equipment 1200 of the present embodiment With transmitter 1230.
Receiver 1210 can receive down link control information, data by respective channel from base station (such as base station 1100) And/or message.Here, which can correspond to transmission/receiving point.More specifically, receiver 1210 can be by subframe The data area of the middle N number of PRB pair of each for forming K EPDCCH set receives EPDCCH from the base station.Here, the K It may be greater than with N or the natural number equal to 1.
Control processor 1220 can control operation (the i.e. user equipment needed for performing the present embodiment described above 1200 operation).More specifically, control processor 1210 can be controlled in the EPDCCH set with being formed for user equipment 1200 Here, user equipment 1200 is configured the associated operation (i.e. the operation of user equipment 1200) of blind decoding of each polymerization grade Down link control information (DCI) is received for the EPDCCH by corresponding to downlink control channel.In addition, control processor 1210 can decode the EPDCCH in each EPDCCH set in EPDCCH UE dedicated search space according to corresponding DCI format. It in this case, can be by (i) user with the associated ECCE of EPDCCH decodings in EPDCCH UE dedicated search space The radio network temporary identifier (RNTI) of equipment, (ii) subframe index, (iii) polymerization grade and (iv) NECCE, that is, it is included in The function of ECCE sums in one EPDCCH set is formed (or definition).
Transmitter 1230 can transmit control information, data and/or message by respective channel to the base station.
ECCE can be related with the operation of base station 1100 or user equipment 1200 continuous or discrete.More specifically Ground, ECCE can be formed as being based in polymerization grade unit (i.e. in the ECCE number units corresponding to polymerization grade) It is continuous in the number of monitoring operation that corresponding polymerization grade performs.Alternatively, ECCE can be formed as in polymerization grade It is discrete in unit.Specifically, in the case of distributed EPDCCH gathers and/or localize EPDCCH set, ECCE It can be continuous.Meanwhile in the case of gathering in distributed EPDCCH and/or localizing EPDCCH set, ECCE can be It is discrete.It as described above, can be by the ECCE of (i) corresponding EPDCCH set to the associated ECCE jump values of discontinuous ECCE Sum, the candidate EPDCCH numbers that (ii) polymerization grade and (iii) will be monitored based on corresponding polymerization grade by user equipment 1200 Purpose function defines.Meanwhile in the case where user equipment 1200 is configured with multi-carrier indicator field, carrier wave instruction The value of symbol field can be applied to define the function (i.e. ECCE defined functions) of the ECCE.In addition, the transmission of EPDCCH set Type can correspond to one of localization EPDCCH transmission and distribution EPDCCH transmission.
Although the content of the technical standard mentioned in embodiments described above is omitted for the general of this specification Description is included, but the related content of the technical standard may be constructed the part of this specification.Therefore, the specification and/or should The part that the relevant content of the standard is added in claim will be understood to comprise within the scope of the invention.
More specifically, included document may be constructed the part of this specification using one of the document as publication Point.Therefore, the part that the relevant content of standard and/or standard document are added in the specification and/or the claim will It is understood to include within the scope of the invention.
As noted previously, as the technical concept of the present invention is to be described by exemplary embodiment, therefore this field skill Art personnel can not depart from the present invention substantive features in the case of by foregoing description make it is various forms of replace, modification and Change.Therefore, the present invention disclosed in the embodiment be intended to illustrate the present invention technical concept, and the scope of the present invention not by The embodiment limits.The scope of the present invention should explain on the basis of appended claim, so as to be included in and claim All technical concepts in range of equal value belong to the present invention.
Cross reference to related applications
The application requires Korean Patent Application No. 10-2012-0101747 (in September 13 in 2012 according to 35U.S.C. § 119 Day submit) and Korean Patent Application No. 10-2013-0027866 (being submitted on 03 15th, 2013) priority, entirety It is incorporated herein by reference.

Claims (10)

1. a kind of method that the downlink control channel being located in data area is received in user equipment (UE), this method packet It includes：
Enhancing physical downlink control channel EPDCCH is received from transmission/receiving point, wherein, the EPDCCH is included for shape The data area of each one or more Physical Resource Block PRB pairs into multiple EPDCCH set in subframe, and wherein, (i) each PRB pair includes multiple enhancing resource element groups EREG, and (ii) transmits the corresponding increasing of basic unit with EPDCCH Strong control channel element ECCE includes multiple EREG；And
According to the down link control information DCI format in EPDCCH UE dedicated search space, decode in corresponding EPCCCH The EPDCCH in set, wherein by the user equipment monitors for by the decoded ECCE of the EPDCCH by (i) institute State the radio network temporary identifier RNTI of user equipment；(ii) index of the subframe；(iii) polymerization grade；And (iv) institute The function of the ECCE sums of corresponding EPCDDH set is stated to define,
In the case of the EREG for wherein including M number in each PRB pair,
The ECCE includes the EREG of the EREG M/2 numbers of M/4 numbers, and wherein M is natural number.
2. according to the method described in claim 1, wherein described M is 16.
3. it according to the method described in claim 1, wherein, decodes the EPDCCH and includes：
By with monitoring discontinuous ECCE as unit of the number of the corresponding ECCE of the polymerization grade.
4. it according to the method described in claim 3, wherein, decodes the EPDCCH and includes：
Based on the polymerization grade, the ECCE sums gathered using corresponding EPDCCH, the polymerization grade and by institute The function of the EPDCCH number of candidates of user equipment monitors is stated, to determine the ECCE jump values of the discontinuous ECCE.
5. according to the method described in claim 1, wherein, there is the situation of multi-carrier indicator field in the user device configuration Under, the value of the multi-carrier indicator field is applied to define the function of the ECCE.
6. it according to the method described in claim 1, wherein, is transmitted for localization EPDCCH in being transmitted with distribution EPDCCH One is gathered to form each EPDCCH.
7. according to the method described in claim 6, wherein, the polymerization grade is determined based at least one of following： EPDCCH transmission type, subframe type, cyclic prefix CP type and for possible EPDCCH transmission RE numbers whether It is less than threshold value,
Wherein, the type of the EPDCCH transmission includes the localization EPDCCH transmission and distribution EPDCCH transmission；
The subframe type includes common subframe and special subframe；And
The cyclic prefix CP type includes common CP and extension CP.
8. a kind of, configuration is located at the downlink chain in data area in user equipment (UE) dedicated search space in transmission/receiving point The method of road control channel, this method include：
Enhancing physical downlink control channel EPDCCH is formed, wherein, it forms the EPDCCH and includes：By using the use The ECCE that the radio network temporary identifier RNTI of family equipment, the index of the subframe, polymerization grade and corresponding EPDCCH gather The function of sum is controlled defined in EPDCCH UE dedicated search space with the corresponding enhancing of the basic unit of EPDCCH transmission Channel Elements ECCE processed, wherein, (i) described EPDCCH includes forming each in multiple EPDCCH set in subframe The data area of one or more Physical Resource Block PRB pairs, (ii) each PRB pair include multiple enhancing resource element groups EREG, And (iii) each described ECCE includes multiple EREG；And
The ECCE defined in the EPDCCH UE dedicated search space is sent to the user by the EPDCCH to set It is standby,
In the case of the EREG for wherein including M number in each PRB pair,
The ECCE includes the EREG of the EREG M/2 numbers of M/4 numbers, and wherein M is natural number.
9. a kind of user equipment (UE) for being located at the downlink control channel in data area for reception, the user equipment packet It includes：
Receiver, the receiver are configured as receiving enhancing physical downlink control channel EPDCCH from transmission/receiving point, Wherein, the EPDCCH includes one or more Physical Resource Block each in the multiple EPDCCH being used to form in subframe set The data area of PRB pair, and wherein, (i) each PRB pair include multiple enhancing resource element groups EREG, and (ii) and The corresponding enhancing control channel element ECCE of basic unit of EPDCCH transmission includes multiple EREG；And
Control processor, the control processor are configured as：According to the downlink in EPDCCH UE dedicated search space Control information DCI format, decode corresponding EPCCCH set in the EPDCCH, wherein by the user equipment monitors with For by the ECCE of the EPDCCH by the radio network temporary identifier RNTI of the user equipment, the indexing of the subframe, gather Close grade, the function of ECCE sums of corresponding EPCDDH set defines,
In the case of the EREG for wherein including M number in each PRB pair,
The ECCE includes the EREG of the EREG M/2 numbers of M/4 numbers, and wherein M is natural number.
10. a kind of transmission/receiving point, the transmission/receiving point is used to match in EPDCCH user equipment (UE) dedicated search space Setting in the downlink control channel in data area, the transmission/receiving point includes：
Control processor, the control processor are configured as：Enhancing physical downlink control channel EPDCCH is formed, In, it forms the EPDCCH and includes：By using the radio network temporary identifier RNTI of the user equipment, the rope of the subframe Draw, the function of the ECCE sums of polymerization grade and corresponding EPDCCH set, defined in EPDCCH UE dedicated search space The corresponding enhancing control channel unit ECCE of basic unit transmitted with EPDCCH, wherein, (i) described EPDCCH includes being used for The data area of the one or more Physical Resource Block PRB pairs of each in multiple EPDCCH set, (ii) are formed in subframe Each PRB pair includes multiple enhancing resource element groups EREG and (iii) each described ECCE includes multiple EREG；And
Transmitter, the transmitter is configured as will be defined in the EPDCCHUE dedicated search space by the EPDCCH The ECCE is sent to the user equipment,
In the case of the EREG for wherein including M number in each PRB pair,
The ECCE includes the EREG of the EREG M/2 numbers of M/4 numbers, and wherein M is natural number.
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