CN104685810B - For adjusting the method and device of blind decoding in downlink control channel - Google Patents
For adjusting the method and device of blind decoding in downlink control channel Download PDFInfo
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- CN104685810B CN104685810B CN201380050746.7A CN201380050746A CN104685810B CN 104685810 B CN104685810 B CN 104685810B CN 201380050746 A CN201380050746 A CN 201380050746A CN 104685810 B CN104685810 B CN 104685810B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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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
Abstract
The method carried out according to the base station of one embodiment of the invention to the blind decoding in downlink control channel, it includes：The step of using the blind decoding number of candidates (Number of EPDCCH candidates) of every polymerization grade (Aggregation Level) of the more than one EPDCCH groups (set) of terminal to generate EPDCCH；And the step of EPDCCH of the generation is transferred to the terminal；Characterized in that, the blind decoding number of candidates be size based on the resource for forming the EPDCCH groups or the number all organized and calculate.
Description
Technical area
The present invention relates to the method and device that a kind of blind decoding in downlink control channel is adjusted, in more detail
Ground is said, is related to one kind to being set to that by enhanced physical downlink control channel (EPDCCH) downlink can be received
The method and device that the blind decoding of the terminal of control information (Downlink Control Information, DCI) is adjusted.
Background technology
With the development of communication system, the consumer of such as enterprise and individual uses very a variety of wireless terminal devices.Mesh
Preceding, LTE (Long Term Evolution), LTE-A (LTE Advanced) of 3GPP series etc. GSM are
A kind of service departed from based on voice, and the high-speed high capacity for receiving a variety of data such as video, wireless data can be transmitted
Communication system, therefore it is required that exploitation can transmit the technology of Large Volume Data suitable for wireline communication network.
On the other hand, as downlink control channel needs the increase of information that loads, it has been proposed that for its
New EPDCCH, but due to the quantity of the uncontrollable blind decoding in EPDCCH search spaces, therefore blind decoding be present and hold
The problem of row time increases.
The content of the invention
The technical problem to be solved in the present invention
It is above-mentioned in order to solve the problems, such as, a kind of blind decoding number of candidates using determination is provided in this specification to terminal
The method and device that blind decoding is adjusted, wherein determining to be used for by the number of consideration group and the size of composition resource
It is set to receive DCI's (Downlink Control Information) by downlink control channel EPDCCH
Blind decoding (blind decoding) candidate's number in EPDCCH monitoring (monitoring) groups (multiple) (set (s)) of terminal
Amount.
Technical scheme
The method that base station according to an embodiment of the invention is adjusted to the blind decoding in downlink control channel, its
Including：Using the more than one EPDCCH groups (set) of terminal every polymerization grade (per Aggregation Level) it is blind
Decode the step of number of candidates (Number of EPDCCH candidates) is to generate EPDCCH；And by the generation
EPDCCH is transferred to the step of terminal；Characterized in that, the blind decoding number of candidates is based on the composition EPDCCH
The size or the number all organized of the resource of group and calculate.
The method that blind decoding in terminal-pair downlink control channel according to another embodiment of the present invention is adjusted,
It includes：The step of down link signal being received from base station；And the EPDCCH regions of the down link signal in the reception
In be applicable more than one EPDCCH groups every polymerization grade blind decoding number of candidates to perform blind decoding the step of；Its feature
Be, the blind decoding number of candidates be size based on the resource for forming the EPDCCH groups or the number all organized and calculate
's.
Base station according to an embodiment of the invention, it includes：Control unit, it utilizes the more than one EPDCCH groups of terminal
The blind decoding number of candidates of every polymerization grade generate EPDCCH；And transport part, it transmits the EPDCCH of the generation
To the terminal；Characterized in that, the blind decoding number of candidates be size based on the resource for forming the EPDCCH groups or
The number all organized and calculate.
Terminal according to an embodiment of the invention, it includes：Acceptance division, it receives down link signal from base station；And
Control unit, it is applicable the often polymerization of more than one EPDCCH groups in the EPDCCH regions of the down link signal of the reception
The blind decoding number of candidates of grade performs blind decoding；Characterized in that, the blind decoding number of candidates is based on described in composition
The size of the resource of EPDCCH groups or the number all organized and calculate.
Beneficial effect
When being applicable of the invention, downlink control channel EPDCCH terminal is received in ratio in as terminal
Blind decoding is performed in the number of the size of the EPDCCH groups of EPDCCH group characteristics, so as to the end being lifted in EPDCCH search spaces
The blind decoding performance at end.
Brief description of the drawings
Fig. 1 is to represent according to an embodiment of the invention to be used for setting for the attached of the structure of the EPDCCH groups of any terminal
Figure.
Fig. 2 is the accompanying drawing of EPDCCH number of candidates when representing to combine first embodiment and mathematical expression 1.
Fig. 3 be represent according to the second embodiment of the present invention and the number of candidates of the EPDCCH groups of mathematical expression 3 accompanying drawing.
Fig. 4 is to represent to generate by determining blind decoding quantity in the base station according to one embodiment of the invention
EPDCCH, and the accompanying drawing for the process being transmitted to it.
Fig. 5 is to represent to adjust blind solution in EPDCCH regions using blind decoding quantity according to the terminal of one embodiment of the invention
The accompanying drawing of the process of code.
Fig. 6 is the accompanying drawing for the structure for representing the base station according to another embodiment.
Fig. 7 is the accompanying drawing for the structure for representing the user terminal according to another embodiment.
Embodiment
Hereinafter, the section Example of the present invention will be described in detail by exemplary accompanying drawing.It should be noted that right
During the inscape of each accompanying drawing assigns sign flag, for identical inscape, on different accompanying drawings
It has been shown that, identical symbol is also used as far as possible.In addition, when the present invention will be described, if it is determined that to known to correlation
When the detailed description of structure or function may obscure the purport of the present invention, it is convenient to omit detailed description thereof.
Wireless communication system in the present invention in order to such as plurality of communication services of voice, packet is provided and by extensive cloth
Put.Wireless communication system include user terminal (User Equipment, UE) and base station (Base Station, BS, or
eNB).User terminal in this manual refers to a kind of generalized concept of the terminal in radio communication, therefore should be interpreted that not
Only include the user equipment (User Equipment, UE) in WCDMA and LTE, HSPA etc., but also including the movement in GSM
Radio station (Mobile Station, MS), user terminal (User Terminal, UT), subscriber station (Subscriber Station,
SS), wireless device (wireless device) etc..
Base station or cell (cell) generally refer to the station (station) to be communicated with user terminal, it may also be said to Cheng Jie
Point-B (Node-B), eNB (evolved Node-B), sector (Sector), website (Site), base station transceiver system (Base
Transceiver System, BTS), access point (Access point), via node (Relay Node), RRH (Remote
Radio Head), RU (Radio Unit) etc. other terms.
Base station or cell (cell) i.e. in this specification should be interpreted to represent the base station controller (Base in CDMA
Station Controller, BSC), the subregion of the covering such as the eNB in WCDMA NodeB, LTE or sector (website)
Or the implication of the broad sense for the function of showing, and be all including especially big cell (megacell), macrocell
(macrocell), Microcell (microcell), picocell (picocell), Femto cell (femtocell) and relaying
The implication of a variety of overlay areas such as node (relay node), RRH, RU communication range.
Due to there is the base station for controlling each cell in a variety of cells enumerated, therefore base station can be interpreted two kinds
Implication.I) with wireless zone relatively, there is provided especially big cell, macrocell, Microcell, picocell, Femto cell, cell
(smallsite) device in itself, or ii) refer to the wireless zone in itself.In i), interact and offer rule can be provided
The device of fixed wireless zone is all by the control of identical individual or all devices for making the wireless zone cooperate and forming
Base station.According to constituted mode eNB, RRH of wireless zone, antenna, RU, LPN, point, transmission receiving point, transfer point, receiving point etc.
As the embodiment of base station.In ii) in, with the viewpoint of user terminal or the angle of adjacent base station, receive or transmission signal
Wireless zone can refer to base station in itself.
Therefore, by especially big cell, macrocell, Microcell, picocell, Femto cell, cell, RRH, antenna, RU,
LPN (Low Power Node), point, eNB, transmission receiving point, transfer point, receiving point are referred to as base station.
User terminal and base station in this specification is as realizing technology or technological thought described in this specification
Two kinds of transmission receive main bodys and used with the implication of broad sense, do not limited by particular term or word.In this specification
User terminal and base station as two kinds of (up-links for realizing technology or technological thought described in this specification
(Uplink) or downlink (Downlink)) transmission received main body and used with the implication of broad sense, not by particular term
Or word is limited.Wherein, up-link (Uplink, UL, or up), which refers to transmit to base station by user terminal, receives number
According to mode, downlink (Downlink, DL, or descending) refer to by base station to user terminal transmit receive data side
Formula.
It is not particularly limited for the access mode suitable for wireless communication system.Can use such as CDMA connect
Enter mode (Code Division Multiple Access, CDMA), time division multiple acess access way (Time Division
Multiple Access, TDMA), frequency division multiple access access way (Frequency Division Multiple Access,
FDMA), orthogonal frequency-time multiple access mode (OrthogonALFrequency Division Multiple Access,
OFDMA), OFDM-FDMA, OFDM-TDMA, OFDM-CDMA etc. a variety of access modes.One embodiment of the invention can
Suitable for enter to turn to LTE and LTE-advanced asynchronous wireless communication by GSM, WCDMA, HSPA and enter to turn to CDMA,
The resource allocation in CDMA-2000 and UMB sychronous wireless communication field etc..The present invention can not be construed to by specific radio communication
Field limits or limited, and should be interpreted that all technical fields of the thought including that can be applicable the present invention.
Up-link is transmitted and downlink transmission can use the time division duplex being transmitted using the different time
(Time Division Duplex, TDD) mode, or the FDD being transmitted using different frequencies can be used
(Frequency Division Duplex, FDD) mode.
Also, be in such as LTE, LTE-A system formed on the basis of single carrier wave or carrier wave pair up-link and under
Line link, so as to form specification.Up-link and downlink pass through such as physical downlink control channel (Physicsl
Downlink Control Channel, PDCCH), Physical Control Format Indicator Channel (Physical Control Format
Indicator Channel, PCFICH), physical mixed ARQ instructions channel (Physical Hybrid ARQ Indicator
Channel, PHICH), physical uplink control channel (Physical Uplink Control Channel, PUCCH) etc.
Control channel and transmit control information, and by such as physical down link sharing channel (Physical Downlink Shared
Channel, PDSCH), physical uplink link shared channels (Physical Uplink Shared Channel, PUSCH) etc.
Data channel is formed, so as to transmit data.
On the one hand, EPDCCH (Enhanced PDCCH or Extended PDCCH) transmission control information can also be utilized.
Cell (cell) in this specification can also refer to the coverage of the signal with transmission receiving point transmission or transmission connects
The coverage for the signal that sink (transmission point or transmission/reception point) receives
Member carrier (component carrier), the transmission receiving point are in itself.
The wireless communication system for being applicable embodiment can be and transmission signal by more than two transmission receiving point cooperations
Cooperative multipoint transmission reception system (coordinated multi-point transmission/reception System,
CoMP system) or cooperation multi-antenna transmission mode (coordinated multi-antenna transmission system),
Cooperate multi-cell communication systems.CoMP system can comprise at least two multiple transmission receiving points and terminal.
Multiple transmission receiving point can be base station or macrocell (macro cell, hereinafter referred to as " eNB "), and with height
Transimission power or at least one RRH with low transimission power in macrocell area, wherein RRH pass through optical cable or light
Fiber is connected with eNB and is had line traffic control.
Hereinafter, downlink (downlink) refers to the communication or communication lines from multiple transmission receiving point or base station to terminal
Footpath, up-link (upnlink) refer to from terminal to multiple transmission receiving point or communication or the communication path of base station.In descending chain
Transmitter can be a part for multiple transmission receiving point in road, and receiver can be a part for terminal.In the uplink
Transmitter can be a part for terminal, and receiver can be a part for multiple transmission receiving point.
Signal being transmitted into reception by the channel such as PUCCH, PUSCH, PDCCH, EPDCCH and PDSCH etc. below
Situation, it is indicated with the mode of " be transmitted, receive to PUCCH, PUSCH, PDCCH, EPDCCH and PDSCH ".
ENB performs downlink transmission to terminal.ENB can be transmitted for unicast transmission (unicast
Transmission primary physical Channel Physical downlink sharied signal channel (PhysicALDownlink Shared)
Channel, PDSCH) and receive the down link control information of scheduling etc. needed for PDSCH and for being transmitted as up
In uplink data channel (for example, physical uplink link shared channels (PhysicALDownlink Shared Channel,
PUSCH physical downlink control channel (the PhysicALDownlink Control for the scheduling grant information)) being transmitted
Channel, PDCCH) or EPDCCH.Hereinafter, the content by each transmission reception signal can be recited as " the channel
Be transmitted reception " form.
Now, as below with reference to brief description of the drawings, first terminal (UE1) can to eNB transmitting uplink signals, and
Second terminal can transmitting uplink signals to RRH.
Such as the DL/UL scheduling authorizations for any terminal in the existing system of 3GPP LTE/LTE-A Rel-8,9,10
The DCI (Downlink Control Information) of (scheduling grant), TPC command (command) etc. passes through
By foremost 1~3OFDM symbols (multiple) (system bandwidth of downlink subframe>During 10PRBs) or 2~4OFDM symbols
(multiple) (during system bandwidth≤10PRBs) and the PDCCH (or EPDCCH) that is transmitted are transmitted.Therefore, arbitrary LTE/
LTE-A terminals are passing through DL as described above to receive the DCI for corresponding terminal from base station/eNB/RU/RRH transmission
Subframe foremost 1~3OFDM symbols (multiple) or 2~4OFDM symbols (multiple) and set PDCCH region in, it is necessary to right
Whether transmission scans for (search) for the PDCCH of corresponding terminal, and the operation of such terminal is referred to as blind decoding
(blind decoding).For the blind decoding of the terminal, the PDCCH region is by the base unit that is transmitted as PDCCH
Control channel unit (Control Channel Element, CCE) is formed.For the composition of the CCE, arbitrary DL subframe
PDCCH region by the RE (Resource for PHICH and PCFICH and for communicating downlink physical signalling CRS
Element remaining RE points outside) are to be formed by being grouped (grouping) to continuous 4 RE on the frequency axis
REG (Resource Element Group), wherein, PHICH and PCFICH are other to be transmitted by the PDCCH region
Downlink physical channel.As described above, when the REG of resource impact (resource mapping) unit as CCE is formed
When, in order that the diversity gain (diversity gain) of PDCCH transmission maximizes, each CCE is respectively by 9 REG staggeredly
(interleaved REG) is formed.
Terminal is performed for whether transmitting the blind decoding of PDCCH for corresponding terminal in units of the CCE.But
In order to receive the energy-conservation (power of PDSCH sufficient processing time (processing time) and terminal to terminal
Saving), it is not that all CCE for being set in the PDCCH region are performed with blind decoding, but according to every terminal, in order to hold
Row blind decoding and selected by the CCE of terminal monitors (monitoring).As described above, any terminal needs to be monitored
CCE polymerization (aggregation), will be made up of the CCE that the PDCCH transmission for any terminal can occur
PDCCH candidates (candidates) are defined as search space (search space).Have defined in present LTE/LTE-A systems
Any terminal needs the two kinds of search spaces monitored.One is that the common search for needing all terminals in cell to monitor jointly is empty
Between (Common Search Space, CSS), wherein, for system information transmissions and accidental access response (Random Access
Response, RAR) transmission PDSCH distribution information (assignment information) or TPC command information, be used for
DL/UL schedule informations of any terminal etc. can be transmitted by CSS.Another is set to inherently as every terminal
The USS (UE-specific Search Space) of search space (unique search space), for corresponding terminal
DL/UL schedule informations etc. can be transmitted by USS.
Also, when the PDCCH for any terminal is transmitted in LTE/LTE-A systems, LTE/LTE-A systems are supported with root
According to terminal channel status and need the DCI size etc. transmitted to corresponding terminal, it (is not one that multiple CCE are bundled together
CCE the PDCCH transmission based on polymerization (aggregated) CCEs) and to PDCCH being transmitted.In present LTE/LTE-
In A systems, CCE polymerizations (aggregation) are supported to be used as the polymerization grade that PDCCH is transmitted by a CCE
PDCCH based on the AL1 of (Aggregation Level, AL) is transmitted and respectively by the way that 2,4,8 CCE are tied together
Tie up and transmit PDCCH AL2,4,8.Wherein, the USS for any terminal is respectively by every AL independent setting, and needs
PDCCH candidates (candidates) quantity of monitoring of the terminal per AL is wanted, that is, needs the blind decoding quantity of execution of the terminal per AL
It is defined as difference.
Next, the DCI format (format) for needing to perform blind decoding for every terminal is illustrated.Present LTE/
DCI format defined in LTE-A specifications, included according to the purpose of the DCI information transmitted and attribute：For transmitting UL scheduling
The DCI format 0,4 of information；For transmitting the series of DL scheduling authorizations DCI format 1 and the series of DC forms 2；And for TPC command
DCI format 3.Wherein, any terminal is in the USS for corresponding terminal, according to the base belonging to corresponding terminal and corresponding terminal
Channel status between the performance (capability) (for example, each Tx/Rx antenna numbers of UE, eNB) stood and terminal and base station, only
To by top signaling and the PDSCH TM (Transmission Mode) that set and the TM dependence DCI formats (TM of setting
Dependent DCI format) (for example, for the DCI format 1/1B/1D/2/2A/2B/2C of downlink and for up
The DCI format 4 of link) 1 or 2 (one is to be used for PDSCH TM dependence DCI formats, and another is PUSCH TM
PUSCH TM dependences DCI format 4 in 2) and (fallback) the DCI format 0/1A that retracts, respectively according to defined above every
AL PDCCH number of candidates performs blind decoding.In addition, PDCCH candidate's numbers of every AL defined in present LTE/LTE-A
It is as follows：Number of candidates i.e. for AL1,2,4,8 is respectively 6,6,2,2.Thus, it is used for corresponding terminal in any terminal
It can be set as in USS, PDSCH TM dependences DCI formats and rollback DCI format be performed respectively 16 times and most 32 times
Blind decoding, or during if the terminal for being set to PUSCH TM 2,16 times blind decodings are increased to DCI format 4 so that at most
Perform the blind decoding of 48 times.
It is that can be performed in EPDCCH USS blind can receive DCI terminal definitions to be set to by EPDCCH
(legacy) PDCCH is left in decoding, rather than the DwPTS of EPDCCH monitoring DL subframes or special (special) subframe
USS.Therefore, it is that can set described EPDCCH can receive DCI terminal definitions by the EPDCCH to be set to
While monitoring DL or special subframe, by upper strata RRC signaling (higher layer RRC signaling) respectively to by N
PRBs groups (a group of N PRBs) (N={ (1), 2,4,8 } for localized＆ { 2,4,8, (16) } for
Distributed) the EPDCCH groups (set) formed set altogether individual K (>=1) EPDCCH groups (multiple) (set (s)).(so
It and K maximum is a value among 2,3,4,6, will afterwards determine, and form the PRBs of each EPDCCH groups number
Amount, i.e. N are independently set according to per EPDCCH groups) also, the K EPDCCH groups (multiple) be divided into and meet K=K respectivelyL+KD
, KLIndividual concentration (localized) EPDCCH groups (multiple) and KDIndividual distribution (distributed) EPDCCH groups (multiple).But
With described N values and K, KL、...、KDIndependently, all blind decoding numbers of terminal are necessary to be maintained and existing system value
It is identical.
If during existing system, for the DCI format that can be received for being set to corresponding terminal, while it is desirable to
The CCE monitored according to every AL quantity and blind decoding number thus have been determined, but for setting K EPDCCH group
The terminal of (multiple), it is necessary to which while whole blind decoding numbers same as the prior art are maintained, segmentation is according to every
The blind decoding of EPDCCH groups attempts (attempts).If during existing system, can be connect for being set to corresponding terminal
, it is necessary to the USS of the PDCCH number of candidates monitor and the every AL for being configured to reflect it per AL for the DCI format of receipts
CCE quantity and according to its blind decoding number according to PDSCH/PUSCH TM set and be decided to be as described above.Thus, it is right
In the terminal for setting K EPDCCH group (multiple), it is necessary to maintaining the same of whole blind decoding numbers same as the prior art
When, split the EPDCCH number of candidates (the blind decoding number performed is needed in the EPDCCH groups) per EPDCCH groups.
In the present invention, to for being set to receive by the downlink control channel EPDCCH newly imported
EPDCCH monitoring group (multiple) (monitoring set of DCI (Downlink Control Information) terminal
(s) the blind decoding operation scheme in) is defined.
The present invention provides a kind of for being set to receive by EPDCCH in the system more than LTE-A Rel-11
The blind decoding scheme of DCI terminal.Therefore, it is allocated for any one terminal to provide a kind of basis in the present invention
The size (size) of the quantity of EPDCCH groups and each EPDCCH groups (for example, quantity according to the PRB for forming the EPDCCH groups)
Can implicitly (implicit) segmentation per AL EPDCCH number of candidates (candidates) technical scheme.
As described above, when if any terminal is set so as to by EPDCCH to receive DCI, for corresponding terminal
K (>=1) EPDCCH groups (multiple) are set, and each EPDCCH groups are made up of N PRBs groups.Also, each EPDCCH groups are set
The type (distributed or localized) of the fixed EPDCCH groups.As arbitrary EPDCCH terminals and the K that sets
EPDCCH groups (multiple) can be by meeting K=K respectivelyL+KD, KLThe individual EPDCCH groups for concentrating type (localized type)
(multiple) and KDThe EPDCCH groups of individual distribution pattern (distributed type) are (multiple) to be formed.If so by K
During the terminal of the EPDCCH USS settings of (multiple) compositions of EPDCCH groups, DL is monitored in the EPDCCH set by top signaling
The blind decoding performed in PDCCH CSS regions and the EPDCCH USS regions being set for receiving DCI is left in frame.
Now, the blind decoding UE operations in PDCCH CSS are left can be carried out according to existing Rel-10 operation, and in EPDCCH
It is per CC (Component Carrier) that blind decoding UE operations in USS, which should be defined as according to all blind decoding number of attempts,
The situation of most 32 times (PUSCH TM 1 situations) or 48 times (PUSCH TM 2 situation), make its segmentation to composition should
EPDCCH USS K EPDCCH group (multiple).
In addition, if when being set at monitoring EPDCCH terminal, for concentrating type (localized
Type) for EPDCCH groups, in conventional subframe (normALsubframe) (normALCP) and special subframe setting 3,4,8
EPDCCH RE (Resource can be transmitted in (speciALsubframe configuration 3,4,8) (normALCP)
Element quantity) is less than XthreshWhen support AL2,4,8, and in addition in the case of, support AL1,2,4.But additionally
Ground, AL32 can be supported in the case of the former can also be defined, and AL16 can be supported in the case of the latter.
Also, with above-mentioned concentration type EPDCCH groups, for distribution pattern (distributed type)
For EPDCCH groups, it can be transmitted in conventional subframe (normALCP) and special subframe set 3,4,8 (normALCP)
EPDCCH RE (Resource Element) quantity is less than XthreshWhen support AL2,4,8,16, and remove thisOutside situationUnder, branch
Hold AL1,2,4,8.But AL32 in the case similarly, i.e., extraly, can be supported in the case of the former can be defined, and the latter
In the case of can support AL16.However, the determination AL supported by arbitrary EPDCCH groups above-mentioned XthreshOne embodiment of value can
To be 104, but actually it can be applicable the present invention with whether determining the Xthresh values independently.
The present invention is under EPDCCH design specifications as described above, there is provided one kind determines to need in each EPDCCH groups often
The process of the AL EPDCCH number of candidates monitor and realize its device.Wherein, for this method and the device and
Speech, corresponding terminal will need (needing to perform blind decoding) every AL's of monitoring (monitoring) in the EPDCCH groups
EPDCCH candidate (candidates) quantity, according to the quantity of the EPDCCH groups set for corresponding terminal, K values (or KL
Value and KDValue) and form the PRB quantity N values of each EPDCCH groups and determine.
Fig. 1 is to represent according to an embodiment of the invention to be used for setting for the attached of the structure of the EPDCCH groups of any terminal
Figure.Fig. 1 is can be realized by top signaling (higher layer (RRC) signaling).
With reference to figure 1, it will be assumed that in order to illustrate the present invention, for setting the upper strata letter of the EPDCCH groups for any terminal
The structure of (for example, RRC) is made as 110.I.e. corresponding information region may be configured as each EPDCCH groups set information
(1stEPDCCH set configuration information,2ndEPDCCH set configuration
information,KthEPDCCH set configuration information) with being set for corresponding terminal
The related set information of number (Number of EPDCCH sets configured) K values of EPDCCH groups is together layered
(hierarchical) structure of setting.Also, as shown in 120, each EPDCCH groups set information can be by such as forming this
The PRBs of EPDCCH groups distribution information (A group of N1PRB) and the type information of the EPDCCH groups etc. information element
(Information Element, IE) is formed.Now, the PRB of each EPDCCH groups quantity will be formed respectively with
N1、...、NkRepresent, and call it as the size (size) of each EPDCCH groups.
In the first embodiment of the present invention, every AL EPDCCH number of candidates is distributed according to the number K of EPDCCH groups.
According to the number K values of the EPDCCH groups set for any terminal, can determine in each EPDCCH groups
Corresponding terminal needs the number of the every AL monitored EPDCCH groups.Will be defined as can be by each AL of terminal monitors whole
EPDCCH number of candidates is labeled as A1、A2、...、AMWhen, the every AL EPDCCH groups that need to monitor in each EPDCCH groups
Quantity can be determined by the following manner.
Mathematical expression 1
As another scheme for being applicable mathematical expression 1, each EPDCCH groups set information is defined for indicate by
The information area for the AL that EPDCCH groups are supported, and can be based on this EPDCCH number of candidates of the distribution per AL.As the definition letter
Cease an example in region so that the bit map being made up of M bits (bitmap) is defined to each EPDCCH groups set information
The AL indication bits (indicator bits) of mode.The bit map domain (bitmap field) is respectively with 1stAL~MthAL
With 1:1 mapping, so as to whether by the EPDCCH groups each AL be supported to notify to terminal.When i.e. the bit map domain is set as 1,
So that the AL by EPDCCH groups support correspondingly, and if it is not, the bit map domain can be caused to be set to 0.Such as
Upper described, when the AL supported by arbitrary EPDCCH groups is contained in into the EPDCCH group set informations, the mathematical expression 1 of the above can root
According to each AL, (modify) is changed in the following manner.
Mathematical expression 2
Ka refers to a in mathematical expression 2thWhen the bit map of AL instructions field (indicator field) is reversed
EPDCCH group quantity (number of EPDCCH set which athALindicator field bitmap
toggled)。
Wherein, in M AL for being defined as being supported by the EPDCCH groups set for corresponding terminal, 1stAL~MthAL by
Minimum (lowest) AL to highest (largest) AL incremental order definition.It is in office i.e. according to above-mentioned EPDCCH design conditions
According to X in concentration type (Localized type) EPDCCH groups of meaningthreshAL1,2,4 are supported, and in distribution pattern EPDCCH
In the case of 1,2,4,8 being supported in group, 1stAL refers to AL1, and 2ndAL refers to AL2,3rdAL refers to AL4,4thAL refers to AL8.Or according to
XthreshAL2,4,8 are supported in type EPDCCH groups are arbitrarily concentrated, and 2,4,8,16 feelings are supported in EPDCCH groups are distributed
Under condition, each above-mentioned 1stAL is AL2,2ndAL is AL4,3rdAL is AL8,4thAL is AL16.But above-mentioned two situations are
The situation that the EPDCCH groups of at least one distribution pattern are set for corresponding terminal, therefore set when any terminal
EPDCCH set types are all when concentrating type, and the AL supported in the EPDCCH groups set for corresponding terminal is respectively 1,2,4
Or 2,4,8, thus this 1stAL is AL1,2ndAL is AL2,3rdAL is AL4, or 1stAL is AL2,2ndAL is AL4,3rdAL
For AL8.Thus, whether above-mentioned every AL whole EPDCCH number of candidates can be with meeting XthreshIndependently, it is identified as A1
=6, A2=6, A3=2, A4=2.
Or the type combination according to the EPDCCH groups set for corresponding terminal, following three kinds can be applicable respectively
Value.
A-1) in the case of all concentration types of EPDCCH groups set for any terminal, A can be identified as1=
6、A2=6, A3=4, A4=0.
A-2 in the case of) being entirely distribution pattern for the EPDCCH groups that any terminal is set, A can be identified as1=
6、A2=6, A3=2, A4=2.
A-3 the EPDCCH groups and at least one of at least one distribution pattern) are included for the EPDCCH groups that any terminal is set
In the case of individual concentration EPDCCH groups, A is applicable respectively1=6, A2=6, A3=2, and concentrating the EPDCCH groups of type
In be applicable A4=0, and to be applicable A only in the above-mentioned formula being distributed in EPDCCH groups4=2, and it is applicable KDAnd K is replaced to carry out
It is applicable, wherein above-mentioned formula is used to obtain 4thAL EPDCCH candidates.
Fig. 2 is the accompanying drawing of EPDCCH number of candidates when representing to combine first embodiment and mathematical expression 1.Represent to be applicable
A-1), a-2), a-3) example.
210th, 212,214,216,218 be according to X in type EPDCCH groups are concentratedthreshAL1,2,4 are supported, and are being divided
The embodiment of AL1,2,4,8 is supported in cloth type EPDCCH groups.
220th, 222,224,226,228 be according to X in type EPDCCH groups are concentratedthreshSupport AL2,4,8, and
The embodiment of AL2,4,8,16 is supported in distribution pattern EPDCCH groups.
210th, the monitoring number of candidates of concentration type EPDCCH groups when 220 expression K are 1.212nd, 222 represent when K is 2
Concentrate the monitoring number of candidates of type EPDCCH groups.214th, the monitoring candidate of distribution pattern EPDCCH groups when 224 expression K are 1
Quantity.216th, the monitoring number of candidates of distribution pattern EPDCCH groups when 226 expression K are 2.218th, 228 a concentration class is represented
The monitoring number of candidates of type EPDCCH groups and a distribution pattern EPDCCH group.
Described A1、A2、A3、A4、(A5) value be one embodiment, meet A1+A2+A3+A4Whole groups of=16
Close or meet A1+A2+A3+A4+A5=16 whole combinations may each comprise in the scope of the present invention.
The second embodiment of the present invention distributes every AL EPDCCH number of candidates according to the size of EPDCCH groups.
The size of the EPDCCH groups in a second embodiment includes point according to PRB quantity (number of PRBs)
With mode.
, it is necessary to by the EPDCCH groups according to the type institute of above-mentioned EPDCCH groups when setting the EPDCCH groups for any terminal
All EPDCCH number of candidates (or blind decoding number according to it) that monitor of the corresponding terminal of support per AL are determined
Justice is, with the types of EPDCCH groups independently, so as to need all EPDCCH candidate numbers that monitor of the corresponding terminal per AL
Amount ratio in each EPDCCH groups size (above-mentioned N1 ..., Nk) mode distribute to each EPDCCH groups.I.e. for quilt
Be set as to receive DCI any terminal by EPDCCH, respectively distribution with N1, N2 ..., NkK of size
During EPDCCH groups, and the whole EPDCCH number of candidates that will be defined as every AL that corresponding terminal can monitor are referred to as A1、A2、...、
AMWhen, need every AL of corresponding terminal monitoring EPDCCH number of candidates to be carried out by the following manner in each EPDCCH groups
Definition.
Mathematical expression 3
It as another scheme for being applicable above formula, may be such that as first embodiment, i.e., each EPDCCH groups set
Determine information definition be used for indicate by EPDCCH groups support AL information area, and based on this distribute often AL EPDCCH candidate's numbers
Amount.As an example for defining the information area so that define what is be made up of M bits to each EPDCCH groups set information
The AL indication bits (indicator bits) of bit map (bitmap) mode.The bit map domain (bitmap field) point
Not with 1stAL~MthAL is with 1:1 mapping, so as to whether by the EPDCCH groups each AL be supported to notify to terminal.That is the bit
When mapping domain is set as 1 so that by the AL of EPDCCH groups support correspondingly, and if it is not, the bit can be caused to reflect
Diapason is set to 0.As described above, when the AL supported by arbitrary EPDCCH groups is contained in into the EPDCCH group set informations,
Mathematical expression above can change (modify) in the following manner according to each AL.
Mathematical expression 4
In mathematical expression 4, bi,mRefer to ithThe m of EPDCCH groupsthThe bit map value of AL instructions field.
Wherein, in M AL for being defined as being supported by the EPDCCH groups set for corresponding terminal, 1stAL~MthAL by
Minimum (lowest) AL to highest (largest) AL incremental order definition.It is in office i.e. according to above-mentioned EPDCCH design conditions
According to X in concentration type (Localized type) EPDCCH groups of meaningthreshAL1,2,4 are supported, and in distribution pattern EPDCCH
In the case of 1,2,4,8 being supported in group, 1stAL refers to AL1, and 2ndAL refers to AL2,3rdAL refers to AL4,4thAL refers to AL8.Or according to
XthreshAL2,4,8 are supported in type EPDCCH groups are arbitrarily concentrated, and 2,4,8,16 feelings are supported in EPDCCH groups are distributed
Under condition, each above-mentioned 1stAL is AL2,2ndAL is AL4,3rdAL is AL8,4thAL is AL16.Thus, above-mentioned every AL whole
Whether EPDCCH number of candidates can be with meeting XthreshIndependently, it is identified as A1=6, A2=6, A3=2, A4=2.
Or the type combination according to the EPDCCH groups set for corresponding terminal, following three kinds can be applicable respectively
Value.
B-1) in the case of all concentration types of EPDCCH groups set for any terminal, A can be identified as1=
6、A2=6, A3=4, A4=0.
B-2 in the case of) being entirely distribution pattern for the EPDCCH groups that any terminal is set, A can be identified as1=
6、A2=6, A3=2, A4=2.
B-3 the EPDCCH groups and at least one of at least one distribution pattern) are included for the EPDCCH groups that any terminal is set
In the case of individual concentration EPDCCH groups, A is applicable respectively1=6, A2=6, A3=2, and concentrating the EPDCCH groups of type
In be applicable A4=0, and to be applicable A only in the above-mentioned formula being distributed in EPDCCH groups4=2, and it is applicable KDAnd K is replaced to carry out
It is applicable, wherein above-mentioned formula is used to obtain 4thAL EPDCCH candidates.
I.e. according to above-mentioned EPDCCH design conditions, in type (Localized type) EPDCCH groups are arbitrarily concentrated
According to XthreshAL1,2,4,8 are supported, and in the case of supporting 1,2,4,8,16 in distribution pattern EPDCCH groups, 1stAL refers to
AL1, and 2ndAL refers to AL2,3rdAL refers to AL4,4thAL refers to AL8,5thAL refers to AL16.Or according to XthreshArbitrarily concentrating class
AL2,4,8,16 are supported in type EPDCCH groups, and are being distributed in EPDCCH groups in the case of support 2,4,8,16,32, it is each above-mentioned
1stAL is AL2,2ndAL is AL4,3rdAL is AL8,4thAL is AL16,5thAL is AL32.Thus, above-mentioned every AL whole
Whether EPDCCH number of candidates can be with meeting XthreshIndependently, it is identified as A1=6, A2=6, A3=2, A4=1, A5=1.
Or the type combination according to the EPDCCH groups set for corresponding terminal, following three kinds can be applicable respectively
Value.
C-1) in the case of all concentration types of EPDCCH groups set for any terminal, A can be identified as1=
6、A2=6, A3=2, A4=2.
C-2 in the case of) being entirely distribution pattern for the EPDCCH groups that any terminal is set, A can be identified as1=
6、A2=6, A3=2, A4=1, A5=1.
C-3 the EPDCCH groups and at least one of at least one distribution pattern) are included for the EPDCCH groups that any terminal is set
In the case of individual concentration EPDCCH groups, A is applicable respectively1=6, A2=6, A3=2, and concentrating the EPDCCH groups of type
In be applicable A4=1, A5=0, and to be applicable A only in EPDCCH groups are distributed4=0, A5=1.
Fig. 3 be represent according to the second embodiment of the present invention and the number of candidates of the EPDCCH groups of mathematical expression 3 accompanying drawing.
Illustrated in second embodiment in a manner of size of the ratio in the physical set (physical set size) of each EPDCCH groups
The situation of EPDCCH number of candidates is determined, and observes the embodiment of more than two EPDCCH groups.Class is arbitrarily being concentrated in observation
According to X in type EPDCCH groupsthreshAL1,2,4,8 are supported, and 1,2,4,8,16 reality is supported in distribution pattern EPDCCH groups
Apply example.
Number of candidates when 310 expressions concentrate the size of EPDCCH groups identical.Because the PRB quantity of two groups is identical, because
This is applicable c-1), as AL=1 (1stNumber of candidates when AL) is respectively 3, as AL=2 (2ndNumber of candidates when AL) is respectively
3, and as AL=4 (3rd) and AL=8 (4 ALthNumber of candidates when AL) is respectively 1.
In addition, number of candidates when 312 expressions concentrate the size of EPDCCH groups to differ.312 are also suitable and c-1 identicals
A1=6, A2=6, A3=2, A4=2.The PRB quantity of first concentration group is in the case that the PRB quantity of the 4, second concentration group is 2,
According to N during mathematical expression 3totalFor 6, it is multiplied in the N of the first concentration group1/NtotalFor 2/3, it is multiplied in the N of the second concentration group2/Ntotal
For 1/3.Due to that in the case of AL=4 and AL=8, can not be divided by for integer, therefore set for 1.
In the case of EPDCCH is distributed, it can similarly be calculated as 320 and 322.320 represent distribution group
Size identical situation, and the situation that the PRB quantity that the PRB quantity of 322 the first distribution groups of expression is the 4, second distribution group is 2.
It is applicable c-2) A1=6, A2=6, A3=2, A4=1, A5=1 embodiment.
For the first distribution group and the second distribution group in 320, as AL=8 and AL=16, due to being A4=1, A5=1,
Therefore, two distribution groups are embodied in a manner of EPDCCH number of candidates is assigned as 1.
322 be the first distribution group PRB quantity be the 4, second distribution group PRB quantity be 2 situation, according to mathematical expression 3
When NtotalFor 6, it is multiplied in the N of the first concentration group1/NtotalFor 2/3, it is multiplied in the N of the second concentration group2/NtotalFor 1/3.Due to
It in the case of AL=4 and AL=8, can not be divided by for integer, therefore set for 1.Due to A3=2, A4=1, A5=1, therefore
In the case of AL=4, AL=8, AL=16,1 has been selectively set to.
330 and 332 represent for a concentration group and the number of candidates of a distribution group.By being applicable c-3), to concentrating
For type, 330 represent the situation that two EPDCCH groups are formed objects, and A is applicable for concentration group1=6, A2=6, A3=
2、A4=1, A5=0, and it is applicable A for distribution group1=6, A2=6, A3=2, A4=0, A5=1.322 represent two EPDCCH tools
There is different size of situation.The PRB quantity of first concentration group is in the case that the PRB quantity of the 4, second distribution group is 2, according to number
N during formula 3totalFor 6, it is multiplied in the N of the first concentration group1/NtotalFor 2/3, it is multiplied in the N of the second concentration group2/NtotalFor 1/3.
C-3 and mathematical expression 3 are applicable, the value calculated by suitable integer enumeration function can be used in the part that can not calculate integer.
Described A1、A2、A3、A4、(A5) value be one embodiment, meet A1+A2+A3+A4Whole groups of=16
Close or meet A1+A2+A3+A4+A5=16 whole combinations may each comprise in the scope of the present invention.
It is apparent that the situation for being applicable the mutually different scheme per AL is also included within the scope of the present invention.In addition, according to each
The EPDCCH number of candidates of every AL in the EPDCCH groups of such scheme can not show that integer is set for limiting, or not
When can draw integer, the function (ceil or floor) that can calculate greater or lesser integer value can be applicable.
Hereinafter, by being set to that by EPDCCH the DCI receive process of DCI terminal and the biography of base station can be received
Defeated process is observed.Also, the present invention relates to a kind of blind solution for being set to that DCI terminal can be received by EPDCCH
Code method and device, wherein, the EPDCCH is newly directed into 3GPP LTE/LTE-A Rel-11 and follow-up system.
Fig. 4 is to represent to generate by determining blind decoding quantity in the base station according to one embodiment of the invention
EPDCCH, and the accompanying drawing for the process being transmitted to it.
Base station calculates blind decoding number of candidates according to the size or the number all organized of the resource for forming EPDCCH groups
(S410).Using the foregoing size according to resource mathematical expression 3,4 or can utilize the mathematical expression 1 according to the number all organized,
2.Because above-mentioned calculating is predetermined, therefore base station and terminal can enjoy identical information.Therefore, calculating process can be selected
Perform to selecting property.Base station is generated using the blind decoding number of candidates of every polymerization grade of the more than one EPDCCH groups of terminal
EPDCCH(S420).Afterwards, the EPDCCH of generation is transferred to the terminal (S430).
As shown in S410, size or the number all organized of the blind decoding number of candidates ratio in the resource for forming EPDCCH groups
Purpose is reciprocal.Wherein, the size of the resource can be the quantity for the PRB for forming the EPDCCH groups.When utilize mathematical expression 3,
And the EPDCCH groups are when being two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to forming one
The PRB of individual EPDCCH groups quantity is removed determines blind decoding candidate's number in the ratio of the quantity for the PRB for forming whole EPDCCH groups
Amount.In addition, for determining ratio, can be by using the function or utilization that can calculate integer when ratio is not integer
The integer that has predefined and calculate blind decoding number of candidates.
In addition, in order to perform S410 steps, after base station determines number of candidates, notifying can be to institute to terminal, base station
State the information of the blind decoding number of candidates of every polymerization grade of the terminal transmission instruction EPDCCH groups.
Fig. 5 is to represent to adjust blind solution in EPDCCH regions using blind decoding quantity according to the terminal of one embodiment of the invention
The accompanying drawing of the process of code.
Terminal receives down link signal (S510) since base station.Down link signal of the terminal in the reception
The blind decoding number of candidates of every polymerization grade of more than one EPDCCH groups is applicable in EPDCCH regions to perform blind decoding.This
When, blind decoding number of candidates ratio is in the size of resource or the inverse for the number all organized that form the EPDCCH groups.Can be with
It is the number of candidates or utilize the number according to the number all organized that foregoing utilization calculates according to the mathematical expression 3,4 of the size of resource
Formula 1,2 and the number of candidates calculated.Calculate predetermined due to described, therefore base station and terminal can enjoy identical information.
Size or the number all organized of the blind decoding number of candidates ratio in the resource for forming the EPDCCH groups
It is reciprocal.Wherein, the size of the resource can be the quantity for the PRB for forming the EPDCCH groups.When utilizing mathematical expression 3, and institute
When to state EPDCCH groups be two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to forming one
The PRB of EPDCCH groups quantity is removed determines blind decoding number of candidates in the ratio of the quantity for the PRB for forming whole EPDCCH groups.
In addition, for determining ratio, can be by using the function that can calculate integer or using in advance when ratio is not integer
The integer that determines and calculate blind decoding number of candidates.
In addition, in order to share number of candidates between terminal and base station, terminal can be received described in instruction from base station
The information of the blind decoding number of candidates of every polymerization grade of EPDCCH groups.
In Fig. 4,5, base station and terminal can possess blind decoding number of candidates in the form of table (table), can also be by
Base station instruction notice, or terminal can also the mode same with base station calculate EPDCCH groups every polymerization grade blind decoding time
Select quantity.Blind decoding number of candidates is shared in terminal and base station can realize that is, the present invention is not limited in specific in many ways
Sharing mode.
Fig. 6 is the accompanying drawing for the structure for representing the base station according to another embodiment.
With reference to figure 6, control unit 610 and transport part 620, acceptance division 630 are included according to the base station 600 of another embodiment.
Control unit 610 be used for control for perform it is foregoing the present invention and the basis of required base station is set so as to pass through
EPDCCH and all operationss for receiving the DCI method of reseptances of DCI terminal.
Transport part 620 and acceptance division 630 be used for by for perform the foregoing present invention and required signal or information, data with
Terminal is transmitted and received.Fig. 6 base station performs the operation of the base station shown in Fig. 4.
In more detail, the control unit 610 utilizes the blind solution of every polymerization grade of the more than one EPDCCH groups of terminal
Code number of candidates generates EPDCCH, and the transport part is used to the EPDCCH of the generation being transferred to the terminal.And as above
It is described, the blind decoding number of candidates ratio in the resource for forming the EPDCCH groups size or the number all organized
Number.
Size or the number all organized of the blind decoding number of candidates ratio in the resource for forming the EPDCCH groups
It is reciprocal.Wherein, the size of the resource can be the quantity for the PRB for forming the EPDCCH groups.When utilizing mathematical expression 3, and institute
When to state EPDCCH groups be two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to forming one
The PRB of EPDCCH groups quantity is removed determines blind decoding number of candidates in the ratio of the quantity for the PRB for forming whole EPDCCH groups.
In addition, for determining ratio, can be by using the function that can calculate integer or using in advance when ratio is not integer
The integer that determines and calculate blind decoding number of candidates.Also, described in the transport part 620 can indicate to the terminal transmission
The information of the blind decoding number of candidates of every polymerization grade of EPDCCH groups.
Fig. 7 is the accompanying drawing for the structure for representing the user terminal according to another embodiment.
With reference to figure 7, acceptance division 730 and control unit 710, transport part are included according to the user terminal 700 of another embodiment
720。
Acceptance division 730 receives down link control information and data, information by respective channel from base station.
Also, control unit 710 be used for control for perform it is foregoing the present invention and the basis of required base station is set so as to
The all operationss of the DCI method of reseptances of DCI terminal are received by EPDCCH.
Transport part 720 uplink control information and data, information are transmitted to base station by respective channel.Fig. 7 terminal
Perform the operation of the terminal shown in Fig. 5.
Control unit 710 is applicable more than one EPDCCH in the EPDCCH of the down link signal of reception region
The blind decoding number of candidates of every polymerization grade of group performs blind decoding.Acceptance division 730 receives down link signal from base station.Institute
Blind decoding number of candidates ratio is stated in the size of resource or the inverse for the number all organized that form EPDCCH groups.
The blind decoding number of candidates ratio is in the size of resource or the inverse for the number all organized that form EPDCCH groups.
Wherein, the size of the resource can be the quantity for the PRB for forming the EPDCCH groups.It is and described when utilizing mathematical expression 3
When EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to forming one
The PRB of EPDCCH groups quantity is removed determines blind decoding number of candidates in the ratio of the quantity for the PRB for forming whole EPDCCH groups.
In addition, for determining ratio, can be by using the function that can calculate integer or using in advance when ratio is not integer
The integer that determines and calculate blind decoding number of candidates.The acceptance division 730 can be received described in instruction from the base station
The information of the blind decoding number of candidates of every polymerization grade of EPDCCH groups.
Explanation above simply illustratively illustrates the technological thought of the present invention, for the technical area belonging to the present invention
For the those of ordinary skill in domain, a variety of amendments can be being carried out without departing from the essential characteristics of the invention and are being changed
Become.Also, disclosed embodiment of this invention is not configured to limit the technological thought of the present invention, and merely to explanation, this hair
Bright technological thought scope will not be limited by these embodiments.Protection scope of the present invention should be entered by following claims scope
Row is explained, and scope of the presently claimed invention should be interpreted that and all technological thoughts in its equivalents.
The cross reference of related application
According to United States patent law 119 (a) bar (35U.S.C § 119 (a)), present patent application is to 28 days 09 month 2012 years to Korea Spro
State's identified patent applications number the 10-2012-0109011st and 09 month 2013 number of patent application to Korean application on the 02nd
No. 10-2013-0104930 requires its preference, and entire contents is incorporated into present patent application in a manner of bibliography
In.Meanwhile if present patent application in addition to the U.S. it is other country also with more than equally the reasons why require preference
If, entire contents will be incorporated into present patent application in a manner of bibliography.
Claims (14)
1. a kind of method that base station is adjusted to the blind decoding in downlink control channel, it includes,
EPDCCH step is generated using the blind decoding number of candidates of every polymerization grade of the more than one EPDCCH groups of terminal
Suddenly；And
The step of EPDCCH of the generation is transferred to the terminal；
Characterized in that,
The blind decoding number of candidates be size based on the resource for forming the EPDCCH groups or the number all organized and calculate
,
The size of the resource is the quantity for the PRB for forming the EPDCCH groups,
When the EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to structure
Into the PRB of an EPDCCH group quantity and form whole EPDCCH groups PRB quantity and determine.
2. according to the method for claim 1, it is characterised in that
The some or all of ratio of the blind decoding number of candidates is in the size or anti-for the resource for forming the EPDCCH groups
Ratio is in the number all organized.
3. according to the method for claim 1, it is characterised in that
When the EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to structure
Quantity into the PRB of an EPDCCH group determines except the ratio of the quantity in the PRB for forming whole EPDCCH groups.
4. according to the method for claim 3, it is characterised in that
When the ratio is not integer, by using the integer that the function or utilization that can calculate integer have predefined
Calculate blind decoding number of candidates.
5. the method that the blind decoding in a kind of terminal-pair downlink control channel is adjusted, it includes,
The step of down link signal being received from base station；And
Every polymerization grade of more than one EPDCCH groups is applicable in the EPDCCH regions of the down link signal of the reception
Blind decoding number of candidates to perform blind decoding the step of；
Characterized in that,
The blind decoding number of candidates be size based on the resource for forming the EPDCCH groups or the number all organized and calculate
,
The size of the resource is the quantity for the PRB for forming the EPDCCH groups,
When the EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to structure
Into the PRB of an EPDCCH group quantity and form whole EPDCCH groups PRB quantity and determine.
6. according to the method for claim 5, it is characterised in that
The some or all of ratio of the blind decoding number of candidates is in the size or anti-for the resource for forming the EPDCCH groups
Ratio is in the number all organized.
7. according to the method for claim 5, it is characterised in that
When the EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to structure
Quantity into the PRB of an EPDCCH group determines except the ratio of the quantity in the PRB for forming whole EPDCCH groups.
8. a kind of base station for being adjusted to the blind decoding in downlink control channel, it includes,
Control unit, it is generated using the blind decoding number of candidates of every polymerization grade of the more than one EPDCCH groups of terminal
EPDCCH；And
Transport part, the EPDCCH of the generation is transferred to the terminal by it；
Characterized in that,
The blind decoding number of candidates be size based on the resource for forming the EPDCCH groups or the number all organized and calculate
,
The size of the resource is the quantity for the PRB for forming the EPDCCH groups,
When the EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to structure
Into the PRB of an EPDCCH group quantity and form whole EPDCCH groups PRB quantity and determine.
9. base station according to claim 8, it is characterised in that
The some or all of ratio of the blind decoding number of candidates is in the size or anti-for the resource for forming the EPDCCH groups
Ratio is in the number all organized.
10. base station according to claim 8, it is characterised in that
When the EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to structure
Quantity into the PRB of an EPDCCH group determines except the ratio of the quantity in the PRB for forming whole EPDCCH groups.
11. base station according to claim 10, it is characterised in that
When the ratio is not integer, by using the integer that the function or utilization that can calculate integer have predefined
Calculate blind decoding number of candidates.
12. a kind of terminal for being adjusted to the blind decoding in downlink control channel, it includes,
Acceptance division, it receives down link signal from base station；And
Control unit, it is applicable the every of more than one EPDCCH groups in the EPDCCH regions of the down link signal of the reception
The blind decoding number of candidates of polymerization grade performs blind decoding；
Characterized in that,
The blind decoding number of candidates be size based on the resource for forming the EPDCCH groups or the number all organized and calculate
,
The size of the resource is the quantity for the PRB for forming the EPDCCH groups,
When the EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to structure
Into the PRB of an EPDCCH group quantity and form whole EPDCCH groups PRB quantity and determine.
13. terminal according to claim 12, it is characterised in that
The some or all of ratio of the blind decoding number of candidates is in the size or anti-for the resource for forming the EPDCCH groups
Ratio is in the number all organized.
14. terminal according to claim 12, it is characterised in that
When the EPDCCH groups are two or more, the blind decoding number of candidates of every polymerization grade of the EPDCCH groups is according to structure
Quantity into the PRB of an EPDCCH group determines except the ratio of the quantity in the PRB for forming whole EPDCCH groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711116740.1A CN107819550B (en) | 2012-09-28 | 2013-09-23 | Method and apparatus for adjusting blind decoding in downlink control channel |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0109011 | 2012-09-28 | ||
| KR20120109011 | 2012-09-28 | ||
| KR1020130104930A KR101562704B1 (en) | 2012-09-28 | 2013-09-02 | Methods of adjusting blind decoding of downlink control channel and apparatuses thereof |
| KR10-2013-0104930 | 2013-09-02 | ||
| PCT/KR2013/008468 WO2014051293A1 (en) | 2012-09-28 | 2013-09-23 | Method and apparatus for blind decoding adjustment in downlink control channel |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201711116740.1A Division CN107819550B (en) | 2012-09-28 | 2013-09-23 | Method and apparatus for adjusting blind decoding in downlink control channel |
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| CN108809505B (en) * | 2017-05-05 | 2019-12-24 | 维沃移动通信有限公司 | Transmission method of downlink control information, terminal and network side equipment |
| US11291041B2 (en) * | 2018-04-05 | 2022-03-29 | Mediatek Inc. | Simultaneous uplink transmissions |
| US11178655B2 (en) * | 2018-11-13 | 2021-11-16 | Qualcomm Incorporated | Physical downlink control channel limit for dual connectivity |
| US11696298B2 (en) * | 2019-11-17 | 2023-07-04 | Qualcomm Incorporated | Blind decoding limits |
| US20220312391A1 (en) * | 2020-04-08 | 2022-09-29 | Apple Inc. | Methods and apparatus for dl control channel monitoring and candidates dropping in wireless communication |
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