CN103988563B - The mapping method and device of the search space of down control channel - Google Patents
The mapping method and device of the search space of down control channel Download PDFInfo
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Abstract
The embodiments of the invention provide a kind of mapping method and device of the search space of down control channel, wherein, methods described includes：It is defined as the search space of down control channel (PDCCH) distribution according to resource distribution mode；Using resource block RB as interval, each position candidate (candidate) of the PDCCH is mapped to corresponding to the search space on running time-frequency resource.The method and apparatus of the embodiment of the present invention, by the way that PDCCH different candidate are mapped into acquisition frequency selective scheduling gain on different RB, so as to improve PDCCH performance.
Description
Technical field
The present invention relates to wireless communication technology, and more specifically to LTE, (Long Term Evolution, are drilled for a long time
Enter) mapping method of the search space of down control channel in/LTE-A (LTE-Advanced, the Long Term Evolution of enhancing) system
And device.
Background technology
With EUTRA (Evolved Universal Terrestrial Radio Access, the general land of evolution without
Line accesses) evolution of network, there is many new scenes, such as the heterogeneous network with identical or different cell ID.Data are believed
The new characteristic of road and control channel should be introduced into.For enhanced PDCCH (Physical Downlink Control
Channel, Physical Downlink Control Channel), it is necessary to consider herein below：
Increased control channel capacity can be supported；
Frequency domain ICIC (Inter-Cell Interference Coordination, inter-cell interference cancellation can be supported
Technology)；
The space huge profit that control channel resource can be improved is used；
Wave beam forming and/or diversity can be supported；
Can be on new carrier type and MBSFN ((Multicast Broadcast Single Frequency
Network, multicast broadcast single frequency network) operate in subframe；
It can be coexisted with traditional UE (User Equipment, user equipment) on same carrier wave.
Desired characteristic includes the ability with scheduling frequency selection and mitigates the ability of inter-cell interference.More than being based on
Demand, E-PDCCH (Enhanced-PDCCH, enhanced PDCCH) can be allowed to be located at traditional PDSCH (Physical
Downlink Shared Channel, Physical Downlink Shared Channel) region.E-PDCCH is located at one of traditional PDSCH region
Subject matter is the design of search space.UE is its E-PDCCH of blind Detecting in the region of its distribution in network side.This area
Domain can be semi-statically configured by high-level signaling, can also carry out dynamic configuration by the signaling of layer 1.It is main for E-PDCCH
There are two kinds of mapping schemes, that is, local mapping and distributed mapping.For local mapping, it is desirable to obtain frequency selectivity tune
Gain and frequency selective beam figuration gain are spent, namely eNB (base station) can be in the subcarrier with preferable channel response
Upper transmission E-PDCCH.
In existing system, search space includes multiple times with different polymerizations horizontal (Aggregation Level)
Bit selecting puts (candidate), as shown in table 1, horizontal for each polymerization, is configured with multiple position candidates.How will be multiple
Alternate location mappings on search space to obtain frequency selective scheduling gain or frequency diversity gain, it is non-for E-PDCCH
It is often important.
In the Rel-10v10.0.0 of LTE system, the function of search space is defined as foloows：
Wherein, YkIt is and C-RNTI (Cell Radio Network Temporary Identifier, cell wireless network
Network temporary mark) related UE special parameters, i=0 ..., L-1, NCCE,kBe subframe k control area in CCE (Control
Channel Element, control channel unit) total quantity.
By the function, the starting point of each UE search space can be determined using UE special parameters.However, it is contemplated that ginseng
Number YkIt is only relevant with sub-frame number and C-RNTI, it is impossible to ensure that search space includes the subcarrier for the channel quality having had.Cause
This, it is impossible to obtain frequency scheduling gain.
In order that UE obtains frequency scheduling gain, E-PDCCH resources should be configured or moved by the special high-level signalings of UE
State configures.If E-PDCCH resources are configured by high-level signaling, then design search space has preferably letter to support to be located at
At least one position candidate on the carrier wave of road quality is with regard to extremely important.If reuse existing search space function, Duo Gehou
Bit selecting, which is put, to be mapped on adjacent subcarrier, for example, 4 position candidates are mapped on identical resource block, this will likely
E-PDCCH all position candidates experience identical channel fading is limited, it is thus impossible to obtain frequency scheduling gain.
It should be noted that the introduction to technical background above be intended merely to it is convenient technical scheme is carried out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Can not merely because these schemes the present invention
Background section is set forth and thinks that above-mentioned technical proposal is known to those skilled in the art.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of mapping method and device of the search space of down control channel,
To obtain frequency selective scheduling gain.
A kind of one side according to embodiments of the present invention, there is provided mapping side of the search space of down control channel
Method, wherein, methods described includes：
It is defined as the search space of down control channel (PDCCH) distribution according to resource distribution mode；
It is interval with resource block (RB), each position candidate (candidate) of the PDCCH is mapped to the search
Corresponding to space on running time-frequency resource.
One side according to embodiments of the present invention, there is provided a kind of base station, it is used to carry out searching for down control channel
The mapping in rope space, wherein, the base station includes：
Determining unit, it is defined as the search space of down control channel (PDCCH) distribution according to resource distribution mode；
Map unit, it maps each position candidate (candidate) of the PDCCH using resource block RB as interval
To corresponding to the search space on running time-frequency resource.
One side according to embodiments of the present invention, there is provided a kind of computer-readable program, wherein, when holding in a base station
During the row program, the program causes computer to perform the mapping of the search space of foregoing down control channel in the base station
Method.
One side according to embodiments of the present invention, there is provided a kind of storage medium for being stored with computer-readable program,
Wherein, the computer-readable program causes computer to perform the mapping of the search space of foregoing down control channel in a base station
Method.
The beneficial effect of the embodiment of the present invention is：By the way that PDCCH different candidate are mapped into different RB
It is interior, frequency selective scheduling gain is obtained, so as to improve PDCCH performance.
With reference to following explanation and accompanying drawing, only certain exemplary embodiments of this invention is disclose in detail, specifies the original of the present invention
Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in scope.In appended power
In the range of the spirit and terms that profit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
Used in individual other embodiment, it is combined with the feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more further features, one integral piece, step or component.
Brief description of the drawings
Many aspects of the present invention may be better understood with reference to following accompanying drawing.Part in accompanying drawing is not proportional paints
System, and it is intended merely to show the principle of the present invention.For the ease of showing and describing some parts of the present invention, corresponded in accompanying drawing
Part may be exaggerated or minimized.Element and feature described in the accompanying drawing of the present invention or a kind of embodiment can be with
The element and feature shown in one or more other accompanying drawings or embodiment is combined.In addition, in the accompanying drawings, similar mark
Number corresponding part in several accompanying drawings is represented, and may be used to indicate the corresponding component used in more than one embodiment.Attached
In figure：
Fig. 1 is the mapping method flow chart of the search space of the down control channel of the embodiment of the present invention；
Fig. 2 is the schematic diagram of the one embodiment mapped using formula (1) or formula (2)；
Fig. 3 is the schematic diagram of the another embodiment mapped using formula (1) or formula (2)；
Fig. 4 is the schematic diagram of the one embodiment mapped using formula (3)；
Fig. 5 is the schematic diagram of the one embodiment mapped using formula (4)；
Fig. 6 is the schematic diagram of the one embodiment mapped using formula (5)；
Fig. 7 is the composition schematic diagram of the base station of the embodiment of the present invention.
Embodiment
Referring to the drawings, will be apparent by following specification, the foregoing and further feature of the embodiment of the present invention.This
A little embodiments are exemplary, are not limitations of the present invention.In order to enable those skilled in the art to easy geography
Solve the principle and embodiment of the present invention, PDCCH of the embodiments of the present invention to be sent in lte-a system in PDSCH region
Illustrate, but can manage exemplified by the mapping of the search space of (hereinafter referred to as PDCCH either new PDCCH or E-PDCCH)
Solution, the embodiment of the present invention are not limited to said system, the other systems or scene of the mapping of the search space for being related to PDCCH
It is applicable.
Embodiment 1
The embodiments of the invention provide a kind of mapping method of the search space of down control channel.Fig. 1 is this method
Flow chart, refer to Fig. 1, and this method includes：
Step 101：It is defined as the search space of down control channel (PDCCH) distribution according to resource distribution mode；
Step 102：It is interval with resource block (RB), each position candidate (candidate) of the PDCCH is mapped to
Corresponding to the search space on running time-frequency resource.
In the present embodiment, PDCCH is used for bearing downlink control information (DCI, Downlink Control
Information), it is that least unit is constructed with control channel unit (CCE, Control Channel Element), such as
Shown in table 1, a PDCCH can be made up of L CCE, and L spans are 1,2,4,8, and it represents PDCCH different polymerization journeys
Spend (aggregation level), this L CCE may be in M(L)Sent on individual position.
In the present embodiment, resource distribution mode is, for example, type0, type1, type2 etc., according to different resource allocations
Mode, it may be determined that for the search space of PDCCH distribution.For example, the resource distribution mode based on type0, is assigned with to PDCCH
6 RBG (Resource Block Group, resource block group), according to different system bandwidths, RBG length (size) is different,
Such as system bandwidth is 10MHz, RBG size are 3 RB, then are assigned with 18 RB equivalent to PDCCH.For another example it is based on
Type0 resource distribution mode, 3 RBG are assigned with to PDCCH, then if system bandwidth is 10MHz, RGB size are 3
RB, then it is assigned with 9 RB equivalent to PDCCH.For another example the resource distribution mode based on type2,12 are assigned with to PDCCH
Individual RB.Wherein, resource distribution mode can report to user by system configuration by high-level signaling.Wherein, each RB can include again
Multiple CCE, in the present embodiment, illustrated so that each RB includes 4 CCE as an example.
Wherein, the resource distribution mode of above several types is merely illustrative, the embodiment of the present invention not in this, as
Limitation, with the development of technology, it is possible to new resource distribution mode, such as RB-level bitmap mode occurs.
The method of the embodiment of the present invention can also be used under this resource distribution mode.
In the present embodiment, horizontal according to different polymerization, E-PDCCH each position candidate passes through the unit that newly defines
Step-length (such as using RB as step-length) be mapped in the E-PDCCH resources of distribution, to obtain frequency selection scheduling gain.
That is, the different position candidates of PDCCH are assigned to different running time-frequency resources, the different piece of a position candidate as far as possible
It is assigned on adjacent running time-frequency resource.
In one embodiment, if PDCCH distribution search space RB quantity M(RB)Not less than the PDCCH's
The quantity M of position candidate(L), namely M(RB)≥M(L), then by each alternate location mappings of the PDCCH to the search space
In the different RB of corresponding running time-frequency resource.
For example, the quantity M of the RB for the search space of PDCCH distribution(RB)For 8, then as L=1 or 2, PDCCH candidate
The quantity M of position(L)For 6, meet M(RB)≥M(L), that is, being enough to put down all of PDCCH for the RB of PDCCH distribution quantity
Position candidate, then directly by each alternate location mappings of the PDCCH to different RB.
In one embodiment, if PDCCH distribution search space RB quantity M(RB)Less than the candidate bit
The quantity M put(L), namely M(RB)＜ M(L), then first by the M of the PDCCH(RB)Individual alternate location mappings are to the search space pair
It is according still further to the mode of cyclic shift, remaining alternate location mappings are empty to the search in the different RB for the running time-frequency resource answered
Between corresponding running time-frequency resource different RB in.
For example, the quantity M of the RB for the search space of PDCCH distribution(RB)For 4, then as L=1 or 2, PDCCH candidate
The quantity M of position(L)For 6, meet M(RB)＜ M(L), that is, for PDCCH distribution RB lazy weight to put down PDCCH institute
There is position candidate, then first connect 4 position candidates and be respectively mapped in this 4 RB, will be remaining according still further to the mode of cyclic shift
2 position candidates are respectively mapped in first RB and in second RB.
In embodiments of the present invention, it is included in both examples above, PDCCH time horizontal for different polymerizations
The starting point that bit selecting is put can be located in identical RB, can also be located in different RB.
For example, if the starting point of PDCCH position candidate were in first RB during L=1, PDCCH time during L=2
The starting point that bit selecting is put can be located in first RB, can also be located in second RB；Similarly, during L=4 PDCCH candidate bit
The starting point put can be located in first RB, can also be located in the 3rd RB or the 4th RB.By that analogy.
In embodiments of the present invention, it is included in both examples above, for different RB, PDCCH position candidate
CCE ordinal positions different in different RB are may map to, identical CCE ordinal positions in different RB can also be mapped to.
That is, each position candidate for the PDCCH being mapped in different RB, the position of the CCE on the different RB are identical or not
Together.
For example, if PDCCH first alternate location mappings are on first RB the 4th CCE, the PDCCH's
Second position candidate may map on second RB the 4th CCE, can also be mapped to second RB other CCE
On, such as on first CCE；Similarly, the 3rd position candidate of the PDCCH may map to the 3rd RB the 4th CCE
On, it can also be mapped on the 3rd RB other CCE, such as on second CCE；Similarly, the 4th candidate bit of the PDCCH
Put on the 4th CCE that may map to the 4th RB, can also be mapped on the 4th RB other CCE, such as the 3rd
On CCE.By that analogy.
Wherein, if M(RB)＜ M(L), then for above-mentioned " identical " it may is that, PDCCH M(RB)Individual position candidate
The position of CCE on each RB is identical, and CCE of the remaining position candidate on each RB position is identical.For it is above-mentioned " no
Together " it may is that, PDCCH M(RB)CCE of the individual position candidate on each RB position is different, remaining position candidate
The position of CCE on each RB is different.
Wherein, if M(RB)≥M(L), then for above-mentioned " identical " it may is that, PDCCH each position candidate exists
The position of CCE on each RB is identical.For above-mentioned " difference " it may is that, with the RB CCE included quantity
Position candidate be one group, the position of CCE of the position candidate on each RB in this group is different, for that can not be divided into one group
Position candidate, its CCE on each RB position is different.Exemplified by foregoing, M(RB)For 8, M(L)For 6, a RB includes 4
Individual CCE, then position of preceding 4 position candidates on 4 RB is different, and rear 2 position candidates can not be divided into one group, then the two are waited
The position that bit selecting is put on two other RB is different.
In the present embodiment, if the horizontal quantity no more than control Channel Elements (CCE) in each RB of polymerization,
All CCE of a PDCCH position candidate are mapped in identical RB.If for example, polymerize horizontal L=1 or 2, one
RB includes 4 CCE, then meets above-mentioned relation, and 1 or 2 CCE that a PDCCH position candidate is included is mapped to together
In one RB.If for another example polymerizeing horizontal L=4, a RB includes 4 CCE, then meets above-mentioned relation, one of PDCCH
4 CCE that position candidate is included are mapped in same RB.
In one embodiment, when horizontal for different polymerization, the starting point of PDCCH position candidate is located at different RB
Interior, and for different RB, PDCCH alternate location mappings are in different RB during identical CCE ordinal positions：
It can determine that m-th of position candidate of the PDCCH provides in time-frequency corresponding to the search space according to below equation
CCE on source：
It can also be determined m-th of position candidate of the PDCCH when corresponding to the search space according to below equation
CCE in frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration, it is to be used to distinguish not
With a parameter of start position of the user in E-PDCCH resources.For L=1, it represents to provide relative to E-PDCCH
The starting CCE in source relative skew.Such as E-PDCCH resources are 4 RB, that is, 16 CCE, Xk=1 represents from the 1st RB
The 2nd CCE start.Xk=10 represent since the 3rd RB the 3rd CCE.And for L=2, according to of the invention real
The difference of the method for example offer is applied, corresponding starting point is different；I=0 ..., L-1, L are that polymerization is horizontal, NCCEIt is to match somebody with somebody for E-PDCCH
The CCE put total quantity.
In order that the method for the embodiment is more clear understandable, below in conjunction with accompanying drawing by specific example to the embodiment
Mapping method illustrates.
Fig. 2 is the mapping schematic diagram of the PDCCH of one embodiment of the invention search space.The embodiment is with M(RB)=
4, XkExemplified by=2, according to formula (1) or formula (2), it is possible to achieve mapping result as shown in Figure 2.
Fig. 2 is refer to, because a RB includes 4 CCE, then M(RB)When=4, NCCE=16, that is, being distributed for the PDCCH
4 RB, totally 16 CCE, numbering are 0~15.
As L=1, PDCCH is made up of 1 CCE, and with reference to table 1, the PDCCH shares 6 position candidates, namely M(L)=6,
That is, this CCE of the PDCCH may be sent in 6 position candidates, then each position candidate corresponds to 1 CCE.
Due to Xk=2, then after two CCE are offset, 6 CCE (logical time-frequency resource) since the 3rd CCE (numbering 2) are right
Should PDCCH 6 position candidates.By the method for the present embodiment, when this 6 position candidates are mapped into physics with RB step-lengths
Corresponding to frequency resource in 4 RB, the numbering in 10MHz as shown in Figure 2 (50 RB) bandwidth is in 0,3,6,48 RB.Due to
Meet M(RB)＜ M(L), then will first number the CCE (position candidate) for being 2,3,4,5 and be mapped in different RB, according still further to rotation bit
The mode of shifting, the CCE (position candidate) for being 6,7 will be numbered and be mapped in corresponding RB, RB here refers to that physical resource is corresponding
RB.As shown in Fig. 2 be mapped to the CCE for being 2 is numbered in the RB that the numbering of physical time-frequency resource is 0, will numbering be 3 CCE
It is 6 by the numbering that the CCE that numbering is 4 is mapped to physical time-frequency resource in the RB that the numbering for being mapped to physical time-frequency resource is 3
In RB, the CCE for being 5 will be numbered and be mapped in the RB that the numbering of physical time-frequency resource is 48, be that 6 CCE are mapped to thing by numbering
In the RB that the numbering for managing running time-frequency resource is 0, the CCE that numbering is 7 is mapped in the RB that the numbering of physical time-frequency resource is 3.
In the present embodiment, position of each position candidate on the CCE in each RB is identical, as shown in Fig. 2 numbering is 2,3,4,5
CCE is mapped on each RB the 3rd CCE, and the CCE of numbering 6,7 is mapped on each RB the 4th CCE.
Similarly, as L=2, PDCCH is made up of 2 CCE, and with reference to table 1, the PDCCH shares 6 position candidates, namely M(L)=6, that is to say, that the two CCE of the PDCCH may be sent in 6 position candidates, then each position candidate corresponding 2
Individual CCE.Due to Xk=2, then after 4 CCE are offset, 12 CCE since the 5th CCE (numbering 4) (are patrolled the present embodiment
Volume running time-frequency resource) to should PDCCH 6 position candidates.By the method for the present embodiment, this 6 position candidates are walked with RB
Length is mapped to corresponding to physical time-frequency resource in 4 RB, and numbering is 0,3,6,48 corresponding to physical time-frequency resource as shown in Figure 2
RB in.Because the present embodiment is for different L, the starting point of position candidate is located in different RB, therefore PDCCH during L=2
First position candidate (CCE that numbering is 4,5) is mapped to second RB (RB that the numbering of corresponding physical time-frequency resource is 3)
It is interior, and due to meeting M(RB)＜ M(L), then by numbering it is first (4,5), (6,7), (8,9), the CCE (position candidate) of (10,11) reflect
It is mapped in different RB, by numbering is (12,13) according still further to the mode of cyclic shift, the CCE of (14,15) (position candidate) reflects
It is mapped in corresponding RB.In the present embodiment, it is similar with foregoing L=1 situation, CCE of each position candidate in each RB
Position it is identical, as shown in Fig. 2 numbering is (4,5), (6,7), (8,9), the position candidate of (10,11) are all to take each RB
The the 1st, 2 CCE, numbering is (12,13), the position candidate of (14,15) is all the 3rd, 4 CCE for taking each RB.
Similarly, as L=4, PDCCH is made up of 4 CCE, and with reference to table 1, the PDCCH shares 2 position candidates, namely M(L)=2, that is to say, that this four CCE of the PDCCH may be sent in 2 position candidates, then each position candidate corresponding 4
Individual CCE.Due to Xk=2, then for the present embodiment after 8 CCE are offset, 8 CCE since the 9th CCE (numbering 8) are corresponding
2 position candidates of the PDCCH.By the method for the present embodiment, when this 2 position candidates are mapped into physics as step-length using RB
In two RB of frequency resource.Likewise, because the present embodiment is located in different RB for different L, the starting point of position candidate,
Therefore the starting point (8,9,10,11) of PDCCH position candidate will be mapped to the 3rd RB and (correspond to physical time-frequency resource during L=4
The RB that numbering is 6) in, due to corresponding 4 CCE of each position candidate, therefore, a position candidate has just taken whole RB.
In the above description, RB corresponding to the physical time-frequency resource that each position candidate of the PDCCH is be mapped to (is compiled
Number be respectively 0,3,6,48), and for example, the present embodiment not in this, as limitation.
The mapping of the position candidate of the PDCCH shown in Fig. 2 can be realized by above formula (1) or formula (2),
I.e., it is possible to determine the CCE that PDCCH each position candidate is be mapped to.In addition, from figure 2 it can be seen that pass through formula (1)
Or the mapping of formula (2), in each RB, a position candidate is at least distributed, at most distributes two position candidates.
Fig. 3 is the mapping schematic diagram of the PDCCH of another embodiment of the present invention search space.The embodiment is with M(RB)
=8, XkExemplified by=3, according to formula (1) or formula (2), it is possible to achieve mapping result as shown in Figure 3.
Fig. 3 is refer to, because a RB includes 4 CCE, then M(RB)When=8, NCCE=32, that is, being distributed for the PDCCH
8 RB, totally 32 CCE, numbering are 0~31.
As L=1, PDCCH is made up of 1 CCE, and with reference to table 1, the PDCCH shares 6 position candidates, namely M(L)=6.
Due to Xk=3, corresponding 1 CCE of each position candidate, then after 3 CCE are offset, 6 since the 4th CCE (numbering 3)
Individual CCE to should PDCCH 6 position candidates.By the method for the present embodiment, this 6 position candidates are mapped with RB step-lengths
To corresponding to physical time-frequency resource in 8 RB, due to meeting M(RB)≥M(L), then will directly number is 6 of 3,4,5,6,7,8
CCE (position candidate) is mapped to corresponding to physical time-frequency resource in 6 RB, the starting point (namely CCE of numbering 3) of its position candidate
It is interior positioned at first RB (#1) corresponding to the physical time-frequency resource.
Similarly, as L=2, PDCCH is made up of 2 CCE, and with reference to table 1, the PDCCH shares 6 position candidates, namely M(L)=6, corresponding 2 CCE of each position candidate, then the present embodiment is after it offset by 6 CCE, from the 7th CCE (numbering 6)
Start 12 CCE to should PDCCH 6 position candidates.By the method for the present embodiment, by this 6 position candidates with RB
Step-length is mapped to corresponding to physical time-frequency resource in 8 RB, because for different L, the starting point of position candidate is positioned at different
In RB, therefore according to the method for cyclic shift, first position candidate (CCE of numbering 6,7) is mapped to physical time-frequency money
Corresponding to source in second RB (#2), by that analogy, numbering is (8,9), (10,11), (12,13), (14,15), (16,17)
It is (CCE position in #3, #4, #5, #6, #7 RB that CCE (position candidate), which is respectively mapped to numbering corresponding to the physical time-frequency resource,
Put identical, be all the 3rd, 4 CCE).
Similarly, as L=4, PDCCH is made up of 4 CCE, and with reference to table 1, the PDCCH shares 2 position candidates, namely M(L)=2, corresponding 4 CCE of each position candidate, then the present embodiment is after 12 CCE are offset, and from the 13rd CCE, (numbering is
12) start 8 CCE to should PDCCH 2 position candidates.By the method for the present embodiment, by this 2 position candidates with
RB is that step-length is mapped to corresponding to physical time-frequency resource in two RB, and the starting point of its position candidate will be mapped to physical time-frequency money
Corresponding to source in the 4th RB, due to corresponding 4 CCE of each position candidate, therefore, a position candidate has just taken entirely
RB。
In the fig. 3 embodiment, numbering #1~#6 RB is not necessarily continuous on corresponding physical time-frequency resource,
For example, may also be discrete distribution as shown in Figure 2.Continuous numbering is given in figure 3, is to illustrate in different polymerizations
When horizontal, the starting point of PDCCH position candidate is located in different RB.Below in an example, there is also identical situation,
Such as it is referred to as first RB (#1) of physical time-frequency resource, second RB (#2), the 3rd RB (#3), the 4th RB (#4) etc.,
Its implication is identical with Fig. 3 embodiment, no longer illustrates one by one.
In another embodiment, when for different polymerization levels, the starting point of PDCCH position candidate is positioned at identical
RB in, and for different RB, PDCCH alternate location mappings are in different RB during identical CCE ordinal positions：
It can determine that m-th of position candidate of the PDCCH provides in time-frequency corresponding to the search space according to below equation
CCE on source：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration, it is to be used to distinguish not
With a parameter of start position of the user in E-PDCCH resources, its implication is as it was previously stated, will not be repeated here；I=
0 ..., L-1, L are that polymerization is horizontal, NCCEIt is for the CCE of E-PDCCH configurations total quantity.
In order that the method for the embodiment is more clear understandable, below in conjunction with accompanying drawing by specific example to the embodiment
Mapping method illustrates.
Fig. 4 is the mapping schematic diagram of the PDCCH of one embodiment of the invention search space.The embodiment is with M(RB)=
4, XkExemplified by=2, according to formula (3), it is possible to achieve mapping result as shown in Figure 4.
Unlike the mapping result shown in Fig. 2, the present embodiment is for the different horizontal L of polymerization, PDCCH candidate bit
The starting point put is located in identical RB.
Fig. 4 is refer to, as L=1, the starting point of PDCCH position candidate, namely the CCE that numbering is 2 is when being mapped to physics
In first RB of frequency resource.As L=2, the starting point of PDCCH position candidate, namely the CCE that numbering is (4,5) also are located at
In first RB of physical time-frequency resource.As L=4, the starting point of PDCCH position candidate, namely numbering is (8,9,10,11)
CCE also be located in first RB of physical time-frequency resource.
In another embodiment, when for different polymerization levels, the starting point of PDCCH position candidate is positioned at difference
RB in, and for different RB, when PDCCH alternate location mappings are to CCE ordinal positions different in different RB：
It can determine that m-th of position candidate of the PDCCH provides in time-frequency corresponding to the search space according to below equation
CCE on source：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration, it is to be used to distinguish not
With a parameter of start position of the user in E-PDCCH resources, its implication is as it was previously stated, will not be repeated here；I=
0 ..., L-1, L are that polymerization is horizontal, NCCEIt is for the CCE of E-PDCCH configurations total quantity.
In order that the method for the embodiment is more clear understandable, below in conjunction with accompanying drawing by specific example to the embodiment
Mapping method illustrates.
Fig. 5 is the mapping schematic diagram of the PDCCH of one embodiment of the invention search space.The embodiment is with M(RB)=
4, XkExemplified by=2, according to formula (4), it is possible to achieve mapping result as shown in Figure 5.
Unlike the mapping result shown in Fig. 2, the present embodiment is for different RB, PDCCH alternate location mappings
To different CCE ordinal positions.
Unlike the mapping result shown in Fig. 4, the present embodiment is horizontal for different polymerizations, PDCCH candidate bit
The starting point put is located in different RB, and for different RB, PDCCH alternate location mappings to different CCE ordinal positions.
Fig. 5 is refer to, as L=1, the starting point of PDCCH position candidate, namely the CCE that numbering is 2 is when being mapped to physics
In first RB of frequency resource, however, position of each position candidate of the PDCCH in each RB is different, for example, numbering is
2 CCE is located at first RB of physical time-frequency resource the 3rd CCE position, and the CCE that numbering is 3 is located at physical time-frequency money
Second RB in source the 4th CCE position, the CCE that numbering is 4 are located at first of the 3rd RB of physical time-frequency resource
CCE position, the CCE that numbering is 5 are located at the 4th RB of physical time-frequency resource second CCE position, numbering 6,7
After CCE maps according to cyclic shift, the CCE that numbering is 6 is located at first RB of physical time-frequency resource the 4th CCE position
Put, the CCE that numbering is 7 is located at second RB of physical time-frequency resource first CCE position.
Similarly, as L=2, the starting point of PDCCH position candidate, namely the CCE that numbering is (4,5) are located at physical time-frequency
In second RB of resource, however, position of each position candidate of the PDCCH in each RB is different.For example, numbering is
The CCE of (4,5) is located at second RB of physical time-frequency resource the 1st, 2 CCE position, and numbering is that the CCE of (6,7) is located at thing
The 3rd RB of running time-frequency resource the 3rd, 4 CCE position is managed, numbering is that the CCE of (8,9) is located at the 1st, 2 of the 4th RB
CCE position, numbering are the position for the 3rd, 4 CCE that the CCE of (10,11) is located at first RB of physical time-frequency resource, numbering
For (12,13) CCE be located at physical time-frequency resource second RB the 3rd, 4 CCE position, numbering is the CCE of (14,15)
Positioned at the 3rd RB of physical time-frequency resource the 1st, 2 CCE position.Wherein, because each position candidate corresponds to 2 CCE,
And a RB includes 4 CCE, therefore, in the case of L=2, mentioned here " PDCCH each position candidate is in each RB
Interior position is different " refer to that position of continuous two position candidates in its respective RB is different.
Similarly, as L=4, the starting point of PDCCH position candidate, namely the CCE that numbering is (8,9,10,11) are located at thing
In the 3rd RB for managing running time-frequency resource, due to corresponding 4 CCE of each position candidate, and a RB includes 4 CCE, therefore, right
In L=4 situation, CCE corresponding to a position candidate has taken whole RB, in the absence of " PDCCH each position candidate
Position in each RB is different ".
In another embodiment, when for different polymerization levels, the starting point of PDCCH position candidate is positioned at identical
RB in, and for different RB, when PDCCH alternate location mappings are to CCE ordinal positions different in different RB：
It can determine that m-th of position candidate of the PDCCH provides in time-frequency corresponding to the search space according to below equation
CCE on source：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration, it is to be used to distinguish not
With a parameter of start position of the user in E-PDCCH resources, its implication is as it was previously stated, will not be repeated here；I=
0 ..., L-1, L are that polymerization is horizontal, NCCEIt is for the CCE of E-PDCCH configurations total quantity.
In order that the method for the embodiment is more clear understandable, below in conjunction with accompanying drawing by specific example to the embodiment
Mapping method illustrates.
Fig. 6 is the mapping schematic diagram of the PDCCH of one embodiment of the invention search space.The embodiment is with M(RB)=
4, XkExemplified by=2, according to formula (5), it is possible to achieve mapping result as shown in Figure 6.
Unlike the mapping result shown in Fig. 2, the present embodiment is horizontal for different polymerizations, PDCCH candidate bit
The starting point put is located in identical RB, and for different RB, PDCCH alternate location mappings to different CCE ordinal positions.
Unlike the mapping result shown in Fig. 4, the present embodiment is for different RB, PDCCH alternate location mappings
To different CCE ordinal positions.
Unlike the mapping result shown in Fig. 5, the present embodiment is horizontal for different polymerizations, PDCCH candidate bit
The starting point put is located in identical RB.
Fig. 6 is refer to, as L=1, the starting point of PDCCH position candidate, namely the CCE that numbering is 2 is when being mapped to physics
In first RB of frequency resource, the position of each position candidate of the PDCCH in each RB is similar with Fig. 5, omits say herein
It is bright.
Similarly, as L=2, the starting point of PDCCH position candidate, namely when numbering is that the CCE of (4,5) also is located at physics
In first RB of frequency resource, the position of each position candidate of the PDCCH in each RB is similar with Fig. 5, omits say herein
It is bright.
Similarly, as L=4, the starting point of PDCCH position candidate, namely the CCE that numbering is (8,9,10,11) also are located at
In first RB of physical time-frequency resource.
In figure 2 above-Fig. 6 embodiment, for different subframes, the UE special parameters XkIt is variable.
It can also be seen that if polymerization level, which is not more than in each RB, controls Channel Elements in the embodiment more than
(CCE) quantity, namely L≤4, then all CCE of the PDCCH a position candidate be mapped in identical RB.
According to the method for the present embodiment, when by corresponding to PDCCH each alternate location mappings to the search space of distribution
After on running time-frequency resource, to inform the search space that UE is distributed RB configuration and in RB CCE sequence number, therefore, this reality
Applying the method for example can also comprise the following steps：
Step 103：It will be the sequence number of CCE in the RB configurations and RB of the search space of down control channel (PDCCH) distribution
It is sent to UE.
Thus, it is possible to reduce UE blind check number.In the present embodiment, it is not intended to limit sending method.For example, it can pass through
High-level signaling configures RB the and/or CCE sequence numbers of the UE.
By the method for the embodiment of the present invention, frequency in PDCCH different alternate location mappings to different RB, will be obtained
Rate selectivity scheduling gains, which thereby enhance PDCCH transmission performance.
Present invention also offers a kind of base station, as described in the following examples 2, due to the base station solve the principle of problem with
The mapping method of the search space of the down control channel of embodiment 1 is similar, therefore its specific implementation may be referred to embodiment 1
Method implementation, something in common repeats no more.
Embodiment 2
The embodiments of the invention provide a kind of base station, search space of the base station for carrying out down control channel is reflected
Penetrate.Fig. 7 is the composition schematic diagram of the base station, refer to Fig. 7, the base station includes：
Determining unit 701, it is empty that it is defined as the search of down control channel (PDCCH) distribution according to resource distribution mode
Between；
Map unit 702, it reflects each position candidate (candidate) of the PDCCH using resource block RB as interval
It is mapped to corresponding to the search space on running time-frequency resource.
In one embodiment,
Quantity M of the map unit 702 in the RB for the search space distributed for the PDCCH(RB)Not less than the candidate bit
The quantity M put(L)When, by the difference of running time-frequency resource corresponding to each alternate location mappings to the search space of the PDCCH
RB in.
In one embodiment,
Quantity M of the map unit 702 in the RB for the search space distributed for the PDCCH(RB)Less than the position candidate
Quantity M(L)When, first by the M of the PDCCH(RB)Running time-frequency resource corresponding to individual alternate location mappings to the search space is not
With in RB, according still further to the mode of cyclic shift, by running time-frequency resource corresponding to remaining alternate location mappings to the search space
Different RB in.
In the foregoing embodiments, horizontal for different polymerization, the map unit is by the position candidate of the PDCCH
Starting point be mapped in different RB, or be mapped in identical RB.
In the foregoing embodiments, each position candidate of the PDCCH is reflected for different RB, the map unit
It is mapped on each RB different CCE position, or is mapped on each RB identical CCE position.
In one embodiment, when horizontal for different polymerization, the map unit is by the position candidate of the PDCCH
Starting point be mapped in different RB, and each position candidate of the PDCCH is reflected for different RB, the map unit
When being mapped on each RB identical CCE position, the map unit 702 can determine the m of the PDCCH according to below equation
Individual position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L
It is that polymerization is horizontal, NCCEIt is for the CCE of E-PDCCH configurations total quantity.
In one embodiment, when horizontal for different polymerization, the map unit is by the position candidate of the PDCCH
Starting point be mapped in different RB, and each position candidate of the PDCCH is reflected for different RB, the map unit
When being mapped on each RB identical CCE position, the map unit 702 can also determine the PDCCH's according to below equation
M-th of position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L
It is that polymerization is horizontal, NCCEIt is for the CCE of E-PDCCH configurations total quantity.
In one embodiment, when horizontal for different polymerization, the map unit is by the position candidate of the PDCCH
Starting point be mapped in different RB, and each position candidate of the PDCCH is reflected for different RB, the map unit
When being mapped on each RB different CCE position, the map unit 702 can determine the m of the PDCCH according to below equation
Individual position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L
It is that polymerization is horizontal, NCCEIt is for the CCE of E-PDCCH configurations total quantity.
In one embodiment, when horizontal for different polymerization, the map unit is by the position candidate of the PDCCH
Starting point be mapped in identical RB, and each position candidate of the PDCCH is reflected for different RB, the map unit
When being mapped on each RB identical CCE position, the map unit 702 can determine the m of the PDCCH according to below equation
Individual position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L
It is that polymerization is horizontal, NCCEIt is for the CCE of E-PDCCH configurations total quantity.
In one embodiment, when horizontal for different polymerization, the map unit is by the position candidate of the PDCCH
Starting point be mapped in identical RB, and each position candidate of the PDCCH is reflected for different RB, the map unit
When being mapped on each RB different CCE position, the map unit 702 can determine the m of the PDCCH according to below equation
Individual position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L
It is that polymerization is horizontal, NCCEIt is for the CCE of E-PDCCH configurations total quantity.
In the foregoing embodiments, if the horizontal quantity no more than control Channel Elements (CCE) in each RB of polymerization,
All CCE of a position candidate of the PDCCH are mapped in identical RB.
In the foregoing embodiments, for different subframes, UE special parameters XkIt is variable.
In one embodiment, the base station can also include：
Transmitting element 703, it will be CCE in the RB configurations and RB of the search space of down control channel (PDCCH) distribution
Sequence number be sent to UE.
By the base station of the present embodiment, by PDCCH different alternate location mappings to corresponding RB, frequency can be obtained
Selective scheduling gains, which thereby enhance PDCCH transmission performance.
The embodiment of the present invention additionally provides a kind of computer-readable program, wherein, should when performing the program in a base station
Program causes computer to perform the mapping method of the search space of the down control channel described in embodiment 1 in the base station.
The embodiment of the present invention additionally provides a kind of storage medium for being stored with computer-readable program, wherein, the computer
Readable program causes computer to perform the mapping method of the search space of the down control channel described in embodiment 1 in a base station.
Apparatus and method more than of the invention can be realized by hardware, can also be realized by combination of hardware software.The present invention
It is related to such computer-readable program, when the program is performed by logical block, can realizes the logical block above
Described device or component parts, or the logical block is realized various methods or step described above.Logical block is for example
Processor used in field programmable logic part, microprocessor, computer etc..The invention further relates to for storing above journey
The storage medium of sequence, such as hard disk, disk, CD, DVD, flash memory.
Above in association with specific embodiment, invention has been described, it will be appreciated by those skilled in the art that this
A little descriptions are all exemplary, are not limiting the scope of the invention.Those skilled in the art can be according to the present invention
Spirit and principle various variants and modifications are made to the present invention, these variants and modifications are also within the scope of the invention.
Claims (23)
1. a kind of mapping method of the search space of down control channel, wherein, methods described includes：
It is defined as the search space of down control channel distribution according to resource distribution mode；
Using resource block RB as interval, each position candidate candidate of the down control channel is mapped to the search
Corresponding to space on running time-frequency resource；
Wherein, the RB for the search space distributed if down control channel quantity M(RB)Not less than the position candidate
Quantity M(L), then by running time-frequency resource corresponding to each alternate location mappings to the search space of the down control channel
Different RB in.
2. a kind of mapping method of the search space of down control channel, wherein, methods described includes：
It is defined as the search space of down control channel distribution according to resource distribution mode；
Using resource block RB as interval, each position candidate candidate of the down control channel is mapped to the search
Corresponding to space on running time-frequency resource；
Wherein, the RB for the search space distributed if down control channel quantity M(RB)Less than the position candidate
Quantity M(L), then first by the M of the down control channel(RB)Time-frequency corresponding to individual alternate location mappings to the search space provides
In the different RB in source, according still further to the mode of cyclic shift, during by corresponding to remaining alternate location mappings to the search space
In the different RB of frequency resource.
3. method according to claim 1 or 2, wherein,
Horizontal for different polymerizations, the starting point of the position candidate of the down control channel is located in different RB.
4. the method according to claim 11, wherein, each time for the down control channel being mapped in different RB
Bit selecting is put, and the position of the CCE on the different RB is identical or different.
5. according to the method for claim 4, wherein, it is each when the down control channel being mapped in different RB
Position candidate, when the position of the CCE on the different RB is identical, the of the down control channel is determined according to below equation
M position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
6. according to the method for claim 4, wherein, it is each when the down control channel being mapped in different RB
Position candidate, when the position of the CCE on the different RB is identical, the of the down control channel is determined according to below equation
M position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
7. according to the method for claim 4, wherein, it is each when the down control channel being mapped in different RB
Position candidate, in the position difference of the CCE on the different RB, the of the down control channel is determined according to below equation
M position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
8. method according to claim 1 or 2, wherein,
Horizontal for different polymerizations, the starting point of the position candidate of the down control channel is located in identical RB.
9. the method according to claim 11, wherein, each time for the down control channel being mapped in different RB
Bit selecting is put, and the position of the CCE on the different RB is identical or different.
10. according to the method for claim 9, wherein, it is each when the down control channel being mapped in different RB
Individual position candidate, when the position of the CCE on the different RB is identical, the down control channel is determined according to below equation
M-th of position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
11. according to the method for claim 9, wherein, it is each when the down control channel being mapped in different RB
Individual position candidate, in the position difference of the CCE on the different RB, the down control channel is determined according to below equation
M-th of position candidate is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
12. according to the method described in claim 5 or 6 or 7 or 10 or 11, wherein,
For different subframes, the UE special parameters XkIt is variable.
13. a kind of base station, it is used for the mapping for carrying out the search space of down control channel, wherein, the base station includes：
Determining unit, it is defined as the search space of down control channel distribution according to resource distribution mode；
Map unit, it maps each position candidate candidate of the down control channel using resource block RB as interval
To corresponding to the search space on running time-frequency resource；
Wherein, quantity M of the map unit in the RB for the search space distributed for the down control channel(RB)Not less than institute
State the quantity M of position candidate(L)When, each alternate location mappings of the down control channel are corresponding to the search space
Running time-frequency resource different RB in.
14. a kind of base station, it is used for the mapping for carrying out the search space of down control channel, wherein, the base station includes：
Determining unit, it is defined as the search space of down control channel distribution according to resource distribution mode；
Map unit, it maps each position candidate candidate of the down control channel using resource block RB as interval
To corresponding to the search space on running time-frequency resource；
Wherein, quantity M of the map unit in the RB for the search space distributed for the down control channel(RB)Less than described
The quantity M of position candidate(L)When, first by the M of the down control channel(RB)Individual alternate location mappings are to the search space pair
It is according still further to the mode of cyclic shift, remaining alternate location mappings are empty to the search in the different RB for the running time-frequency resource answered
Between corresponding running time-frequency resource different RB in.
15. the base station according to claim 13 or 14, wherein,
Horizontal for different polymerizations, the starting point of the position candidate of the down control channel is mapped to not by the map unit
In same RB.
16. base station according to claim 15, wherein, the down control channel being mapped in different RB it is each
Position candidate, the position of the CCE on the different RB are identical or different.
17. base station according to claim 16, wherein, it is each when the down control channel being mapped in different RB
Individual position candidate, when the position of the CCE on the different RB is identical, the map unit according to below equation determine it is described under
M-th of position candidate of row control channel is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
18. base station according to claim 16, wherein, it is each when the down control channel being mapped in different RB
Individual position candidate, when the position of the CCE on the different RB is identical, the map unit according to below equation determine it is described under
M-th of position candidate of row control channel is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
19. base station according to claim 16, wherein, it is each when the down control channel being mapped in different RB
Individual position candidate, in the position difference of the CCE on the different RB, the map unit according to below equation determine it is described under
M-th of position candidate of row control channel is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
20. the base station according to claim 13 or 14, wherein,
Horizontal for different polymerizations, the starting point of the position candidate of the down control channel is mapped to phase by the map unit
In same RB.
21. base station according to claim 20, wherein, the down control channel being mapped in different RB it is each
Position candidate, the position of the CCE on the different RB are identical or different.
22. base station according to claim 21, wherein, it is each when the down control channel being mapped in different RB
Individual position candidate, when the position of the CCE on the different RB is identical, the map unit according to below equation determine it is described under
M-th of position candidate of row control channel is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
23. base station according to claim 20, wherein, it is each when the down control channel being mapped in different RB
Individual position candidate, in the position difference of the CCE on the different RB, the map unit according to below equation determine it is described under
M-th of position candidate of row control channel is in the CCE corresponding to the search space on running time-frequency resource：
Wherein, NCCE_RBIt is the quantity of CCE in a RB；XkIt is the UE special parameters of high-rise configuration；I=0 ..., L-1, L are polymerizations
Level, NCCEIt is the CCE of the down control channel configuration for enhancing total quantity；In the case of in the absence of carrier aggregation CA, m '
=m, in the case where carrier aggregation CA be present, m '=m+M(L)·nCI, wherein, nCIIt is the value of multi-carrier indicator field, M(L)For
The quantity of PDCCH position candidate.
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| PCT/CN2012/072727 WO2013139011A1 (en) | 2012-03-21 | 2012-03-21 | Method and device for mapping search space of downlink control channel |
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| CN111435870B (en) * | 2019-01-11 | 2022-12-30 | 中兴通讯股份有限公司 | Transmission method and device of downlink control channel and storage medium |
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| WO2013139011A1 (en) | 2013-09-26 |
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