CN104396326A - Transmission method for control information, user equipment and base station - Google Patents
Transmission method for control information, user equipment and base station Download PDFInfo
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- CN104396326A CN104396326A CN201280074422.2A CN201280074422A CN104396326A CN 104396326 A CN104396326 A CN 104396326A CN 201280074422 A CN201280074422 A CN 201280074422A CN 104396326 A CN104396326 A CN 104396326A
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- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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Abstract
Provided are a transmission method for control information, a user equipment and a base station. The transmission method includes: a base station sending configuration information about a centralized enhanced physical downlink control channel to a user equipment, a region where the centralized enhanced physical downlink control channel resource configured by the configuration information is located including a first aggregation level region and a second aggregation level region, wherein aggregation levels contained in the second aggregation level region completely occupy one or more physical resource block pairs. Through the embodiments of the present invention, the blocking rate of a control channel can be reduced, and additional control channel overhead will not be generated.
Description
Transmission method, user equipment and the station technology field of control information
The present invention relates to a kind of communications field, more particularly to a kind of transmission method of control information, user equipment and base station.Background technology
In LTE system, Physical Downlink Control Channel（PDCCH, Physical Downlink Control CHannel) it is used for user equipment（UE, User Equipment) transmission control signaling, to realize the functions such as downlink transfer distribution, uplink imparting, Power Control, paging, system information, Stochastic accessing.
But, inventor is had found in existing scheme, for control channel expense is limited in into certain limit, the PDCCH of high aggregation level can produce control channel particle (CCE with the PDCCH of multiple oligomerization ranks, Control Channel Element) coincidence, this coincidence means possible collision between PDCCH, and the obstruction of control channel can be caused to a certain extent.However, for enhanced Physical Downlink Control Channel（EPDCCH, enhanced PDCCH), its inherent characteristic can allow to use new search space structure, can reduce blocking probability by Jin mono- Walk on the premise of overhead is not increased.
It should be noted that the introduction to technical background is intended merely to the convenient explanation clear, complete to technical scheme progress above, and facilitates the understanding of those skilled in the art and illustrate.Can not be merely because these schemes be set forth in the background section of the present invention and think that above-mentioned technical proposal is known to those skilled in the art.The content of the invention
The embodiment of the present invention provides a kind of transmission method of control information, user equipment and base station, it is therefore intended that in the case where not producing extra control channel expense, reduces the blocking rate of control channel.
There is provided a kind of transmission method of control information, institute for one side according to embodiments of the present invention
Stating transmission method includes：
Base station sends the configuration information of centralized enhanced Physical Downlink Control Channel to user equipment, the centralized enhanced physical downlink control channel resource region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included can take one or more Physical Resource Block pair；
The base station sends the centralized enhanced Physical Downlink Control Channel to the user equipment.
Another aspect according to embodiments of the present invention includes there is provided a kind of transmission method of control information, the transmission method：
User equipment receives the configuration information for the centralized enhanced Physical Downlink Control Channel that base station is sent, the centralized enhanced physical downlink control channel resource region that wherein described configuration information is configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included can take one or more Physical Resource Block pair；
The user equipment is detected to receive the centralized enhanced Physical Downlink Control Channel of base station transmission in the centralized enhanced physical downlink control channel resource that the configuration information is configured to search space.
Another aspect according to embodiments of the present invention includes there is provided a kind of base station, the base station：First transmitting element, the configuration information of centralized enhanced Physical Downlink Control Channel is sent to user equipment, the centralized enhanced physical downlink control channel resource region that wherein described configuration information is configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included can take one or more Physical Resource Block pair；
Second transmitting element, the centralized enhanced Physical Downlink Control Channel is sent to user equipment.
Another aspect according to embodiments of the present invention includes there is provided a kind of user equipment, the user equipment：
First receiving unit, receive the configuration information for the centralized enhanced Physical Downlink Control Channel that base station is sent, the centralized enhanced physical downlink control channel resource region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included can take one or more Physical Resource Block pair；
Second receiving unit, the centralized enhanced physical down control configured in the configuration information
In channel resource processed, search space is detected to receive the centralized enhanced Physical Downlink Control Channel of base station transmission.
Another aspect according to embodiments of the present invention is there is provided a kind of communication system, and the communication system includes base station as described above, and user equipment as described above.
Another aspect according to embodiments of the present invention is there is provided a kind of computer-readable program, wherein when performing described program in a user device, described program causes computer to perform the transmission method of control information as described above in the user equipment.
Another aspect according to embodiments of the present invention is there is provided a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmission method of control information as described above in a user device.
Another aspect according to embodiments of the present invention is there is provided a kind of computer-readable program, wherein when performing described program in a base station, described program causes computer to perform the transmission method of control information as described above in the base station.
Another aspect according to embodiments of the present invention is there is provided a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmission method of control information as described above in a base station.
The beneficial effect of the embodiment of the present invention is, by the way that the resource region of centralized enhanced Physical Downlink Control Channel is divided into high aggregation level region and oligomerization rank region, the blocking rate of control channel can be reduced, and does not produce extra control channel expense.
With reference to explanation hereinafter and accompanying drawing, only certain exemplary embodiments of this invention is disclose in detail, the principle for specifying the present invention can be in adopted mode.It should be understood that embodiments of the present invention are not so limited in scope.In the range of the spirit and terms of appended claims, embodiments of the present invention include many changes, modifications and equivalent.
Described for a kind of embodiment and/or the feature that shows can be used in same or similar mode in one or more other embodiments, it is combined with feature in other embodiment, or substitute the feature in other embodiment.
Refer to that feature, one integral piece, Walk be rapid or presence of component when " include/comprising " uses herein it should be emphasized that term, but be not precluded from that one or more further features, one integral piece, Walk be rapid or presence or additional of 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 drafting, and is intended merely to show the principle of the present invention.For the ease of showing and describing some parts of the present invention, may to be exaggerated Huo Shrink small for corresponding part in accompanying drawing.
The element and feature that element and feature described in a kind of accompanying drawing or embodiment of the present invention can be shown in one or more other accompanying drawings or embodiment are combined.In addition, in the accompanying drawings, similar label represents corresponding part in several accompanying drawings, and may be used to indicate the corresponding component used in more than one embodiment.
Fig. 1 is a PDCCH CCE logical construction schematic diagram；
Fig. 2 is the schematic flow sheet of the transmission method of the embodiment of the present invention；
Fig. 3 is the ePDCCH of an embodiment of the present invention eCCE logical construction schematic diagram；Fig. 4 is the schematic diagram of the ePDCCH expenses contrast of the embodiment of the present invention；
Fig. 5 is an exemplary plot of the search space configuration of the embodiment of the present invention；
Fig. 6 is another exemplary plot of the search space configuration of the embodiment of the present invention；
Figure is the schematic diagram that centralized ePDCCH and distribution PDCCH is collided；Fig. 8 is the centralized ePDCCH and distribution ePDCCH of the embodiment of the present invention region configuration schematic diagram；
Fig. 9 is the centralized ePDCCH and distribution ePDCCH of the embodiment of the present invention another region configuration schematic diagram；
Figure 10 is the centralized ePDCCH and distribution ePDCCH of the embodiment of the present invention another region configuration schematic diagram；
Figure 11 is the centralized ePDCCH and distribution ePDCCH of the embodiment of the present invention another region configuration schematic diagram；
Figure 12 is an exemplary plot of centralized ePDCCH and distribution ePDCCH the physical resource configuration of the embodiment of the present invention；
Figure 13 is the another schematic flow sheet of the transmission method of the embodiment of the present invention；
Figure 14 is a composition schematic diagram of the base station of the embodiment of the present invention；
Figure 15 is a composition schematic diagram of the user equipment of the embodiment of the present invention.
Embodiment
Referring to the drawings, by following specification, foregoing and further feature of the invention will be apparent.In the specification and illustrated in the drawings, specifically disclose only certain exemplary embodiments of this invention, which show some embodiments for the principle that can wherein use the present invention, it will be appreciated that, the invention is not restricted to described embodiment, on the contrary, the present invention includes whole modifications, modification and the equivalent fallen within the scope of the appended claims.
In LTE system, a PDCCH is by some control channel particles（CCE, Control Channel Element) composition, the corresponding PDCCH of different CCE numbers different aggregation levels (AL, Aggregation Level).Table 1 shows PDCCH aggregation levels and CCE number corresponding relations.
Table 1
For each aggregation level, some PDCCH candidates of UE blind checks attempt demodulation and are really sent to the PDCCH of oneself.PDCCH aggregation levels and number of candidates（Blind check number of times）Relation it is as shown in table 2.All PDCCH candidates constitute user's dedicated search space of the UE（UE specific search space )
Table 2
Fig. 1 is the PDCCH CCE provided from network side angle a logical construction schematic diagram, and PDCCH search space concept can be illustrated by by Fig. 1 CCE logical constructions.The N of numbering 0 represents that CCE is numbered in Fig. 1, and all user PDCCH that N depends on present sub-frame scheduling are total
The aggregation level size of number and each PDCCH.CCE sums N size determines PDCCH region size, PDCCH region can take up subframe preceding 1,2,3 or 4 OFDM symbols.Aggregation level occupies L CCE for L PDCCH, and original position is located at L integral multiple CCE numberings.
For example, AL4 PDCCH original positions can be only positioned at the CCE that numbering is 0,4,8 in Fig. 1, AL8 PDCCH is not shown in FIG. 1, can similarly obtain.UE can be by Hash（Hash) function obtains the original position of PDCCH candidates, and blind check is implemented according to the number of candidates shown in table 2 in continuous CCE after.
Fig. 1 actually show also PDCCH multiplexing structure, and one of those is mainly characterized by high aggregation level（Such as AL4 or AL8) PDCCH can be with multiple oligomerization ranks（Such as AL1 or PDCCH 2) produce the coincidence of CCE resources, and this coincidence can actually bring the collision between PDCCH.
For example, an AL4 dispatched PDCCH takes 0 No. 3 (￡, then all AL1 or AL2 PDCCH that can take 0 No. 3 CCE transmission can not be dispatched in book frame in, that is, be blocked（Block) fall, therefore blocking probability is also an important indicator of control channel design.
For new scenes such as heterogeneous network, multipoint cooperative, carrier aggregations in reply LTE-A, Release 11 has started to enhanced Physical Downlink Control Channel（EPDCCH, enhanced PDCCH) research.EPDCCH component units are referred to as eCCE (enhanced CCE), ePDCCH can use with PDCCH same thoughts, still place ePDCCH candidates according to Fig. 1 structures.
However, different from PDCCH, ePDCCH is in Physical Downlink Shared Channel（PDSCH, Physical Downlink Shared CHannel) area transmissions, this causes the Physical Resource Block not taken by ePDCCH to be used to dispatch PDSCH transmission to still having an opportunity.
This advantage can with resource location shared by dynamic instruction ePDCCH in the case of it is more obvious, such as using enhanced Physical Control Format Indicator Channel（EPCFICH, enhanced Physical Control Format Indicator Channel) etc., so that dynamic adjustment control channel expense, therefore ePDCCH can use new search space structure.The present invention is directed to the localized transmission technology of enhanced Physical Downlink Control Channel in lte-a system, it is proposed that a kind of new search space structure, and corresponding collocation method etc., the embodiment of the present invention is described in detail below.
Embodiment 1
The embodiment of the present invention provides a kind of transmission method of control information, applied to base station side.Fig. 2 is the schematic flow sheet of the transmission method of the embodiment of the present invention, as shown in Fig. 2 the transmission method includes：
Walk rapid 201, base station sends the configuration information of centralized enhanced Physical Downlink Control Channel to user equipment, the ePDCCH resources region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level included in the second aggregation level region can take one or more Physical Resource Block pair.
Walk rapid 202, base station sends centralized enhanced Physical Downlink Control Channel to user equipment.In the present invention, the ePDCCH is that centralization ePDCCH, i.e., one ePDCCH are located at one or more Physical Resource Block pair adjacent to each other as far as possible（PRB pair) in.On centralized ePDCCH and distribution ePDCCH and the particular content of Physical Resource Block pair, prior art is may be referred to, be will not be repeated here.
In the present embodiment, ePDCCH configuration information configuration ePDCCH resources, i.e. Physical Resource Block pair where user's dedicated search space.Particular content on configuration information may be referred to prior art.
In the present embodiment, the first aggregation level region and the second aggregation level region can be not present overlapping in actual physical resources mapping or exist partly overlapping.The aggregation level in the second aggregation level region will be fully filled with Physical Resource Block pair, once therefore the aggregation level dispatched, the Physical Resource Block to will not exist waste resource particle（RE, Resource Element);Conversely, when without such scheduling, the Physical Resource Block constitutes control channel expense to can be used for PDSCH transmission, not.
In one embodiment, the first aggregation level region and the second aggregation level region are not present overlapping.For example, the first aggregation level region can be the oligomerization rank region that aggregation level is 1 and/or 2；Second aggregation level region can be the high aggregation level region that aggregation level is 4 and/or 8, and two regions occupy different physical resources.
In another embodiment, the first aggregation level region and the second aggregation level region may have part and overlap.
For example, network side can configure an oligomerization rank region and one high aggregation level region for each UE.Configuration can take a variety of methods, for example, UE configurations K=KL+KhIndividual ePDCCH
Set, as centralized ePDCCH transmission, wherein KL are gathered for placing oligomerization rank candidate（Such as AL1, AL2), KHIt is individual to gather for placing high aggregation level candidate（Such as AL4);In another example K=KL+K can be configured for UEhIndividual centralized ePDCCH set, wherein KL are gathered for placing oligomerization rank candidate（Such as AL1, AL2), KHIt is individual to gather for placing all aggregation level candidates（Such as AL1, AL2, AL4), then it is equivalent to K set and constitutes oligomerization rank region, ΚΗIndividual set constitutes high aggregation level region, and it is overlapping that high and low aggregation level region has part.
It is worth noting that, only being schematically illustrated above to the collocation method in the first aggregation level region and the second aggregation level region, the invention is not restricted to this.Describe, only illustrated below so that the first aggregation level region and the second aggregation level region are not present and overlapped as an example for convenience.
Fig. 3 is the ePDCCH of an embodiment of the present invention eCCE logical construction schematic diagram, shows the eCCE set of all users observed from network side angle.Convenient for statement, here only by taking aggregation level 1,2,4 as an example, AL8 can be promoted according to AL4 thinkings.
As shown in figure 3, centralization ePDCCH eCCE logical constructions have used eCCE numberings 0 N, 0 M.It is different from PDCCH, for centralized ePDCCH, two ePDCCH regions can be divided into according to aggregation level.(^^ regions are only used for placing AL1, AL2 ePDCCH candidates, are easy to the ePDCCH of oligomerization rank multiplexings in a Physical Resource Block for the 6 of label 0^；The M of label 0 eCCE regions, which are used to place, can fill up the AL4 ePDCCH candidates of whole Physical Resource Block pair.
This search space configuration can avoid the collision of AL4 candidates and AL1, AL2 candidate completely, so as to reduce ePDCCH blocking probability.In addition, although additionally reserved M+1 eCCE, but brought extra control channel expense.Because can essentially regard as will should have been moved to high aggregation level region in the AL4 ePDCCH of oligomerization rank subdispatch, 4 integral multiple eCCE will be so vacated in oligomerization region, these eCCE just form some Physical Resource Block pair not utilized by ePDCCH, according to foregoing ePDCCH characteristics, these Physical Resource Block do not constitute control channel expense to can for example be reused by PDSCH.
Fig. 4 is the schematic diagram of the ePDCCH expenses contrast of the embodiment of the present invention.As shown in figure 4, each Physical Resource Block 4 eCCE to being made up of.In Figure 4 A, PDCCH thinkings are continued to use and place ePDCCH position candidates, 16 eCCE has been reserved, can have been taken by the candidate of AL1,2,4, ePDCCH position candidates are with shown in Fig. 1.In figure 4b, the ePDCCH of the present invention is employed
Search space allocation plan, has reserved 32 eCCE, wherein 16 eCCE can be used by AL1, AL2,16 additionally configured eCCE is that AL4 candidates are special.
As shown in Fig. 4 A, 4B, shadow pattern represents to actually obtain the centralized ePDCCH of scheduling, it is assumed here that scheduled 2 AL1 ePDCCH and 1 AL4 ePDCCH.Because unblanketed Physical Resource Block is to available for PDSCH transmission, so the Physical Resource Block only where shade is to constituting control channel expense.
As shown in Fig. 4 A, 4B, the control channel expense of two methods is 3 Physical Resource Block pair, it can be seen that eCCE resources special extra configuration AL4 do not bring extra control channel expense.AL1, AL2 ePDCCH have identical search space for Fig. 4 A, 4B, extra to effectively reduce blocking probability for the AL4 eCCE configured, and will not bring extra control channel expense.
It is worth noting that, this search space configuration is applied to centralization ePDCCH, but it is not particularly suited for PDCCH.Even if because in the presence of the CCE being not used by PDCCH, it can not also be reused by PDSCH, therefore the extra CCE resources of configuration will permanently bring control channel expense.
In the present embodiment, network side can configure oligomerization rank region and high aggregation level region for UE, and the separate configurations in high and low aggregation level region cause system to possess the higher free degree to be controlled blocking probability adjustment.Can the height of aggregation level can fill up a Physical Resource Block to making a distinction with ePDCCH aggregation level, and this characteristic ensure that even if additionally extra control channel expense will not also be introduced by having reserved resource.UE can carry out blind check in different aggregation level regions to the ePDCCH of different aggregation levels.
From above-described embodiment, by the way that the resource region of enhanced Physical Downlink Control Channel is divided into high aggregation level region and oligomerization rank region, the blocking rate of control channel can be reduced, and do not produce extra control channel expense.Embodiment 2
On the basis of embodiment 1, how the present embodiment illustrates from user perspective to network side to user device configuration ePDCCH resources.
In the present embodiment, the lateral user equipment in base station sends the configuration information of enhanced Physical Downlink Control Channel, and ePDCCH resources are configured by user.The ePDCCH resources configured include the
One aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included can take one or more Physical Resource Block pair.Due to being configured by user, multiple user equipmenies can share the first aggregation level region and the second aggregation level region.
In one embodiment, the first aggregation level region and the second aggregation level region are multiple.For example, a part of user equipment can share a pair of first aggregation level regions and the second aggregation level region；Another part user equipment can share another pair the first aggregation level region and the second aggregation level region.
Fig. 5 is an exemplary plot of the search space configuration of the embodiment of the present invention.As shown in figure 5, N number of UE shares a pair of high and low aggregation level regions in figure, M UE shares another pair height, aggregation level region, by that analogy, can configure required aggregation level region successively according to UE quantity.
In the present embodiment, allow multiple UE to share the same area, be to allow UE to be multiplexed as far as possible in the same area, fill up the region to improve the level of resources utilization；The resource that distribution can be made by distributing different regions for UE adapts to the demand that UE quantity increases.
It is worth noting that, Fig. 5 only provides example arrangement, different UE can also share an oligomerization rank region, and configure different high aggregation level regions（Such as UE Kl Kn), do not enumerate one by one.
For Fig. 5 examples, in terms of a certain UE angles, its high aggregation level region configured and itself and every other UE oligomerization rank region are non-intersect folded；In terms of network side angle, all oligomerization regions occupy different physical resources respectively from the high zone of convergency in system in Fig. 5 examples, equivalent to the eCCE structures constituted shown in Fig. 3, therefore obstruction collision will not be produced between height aggregation level candidate, and according to above analyzing, extra expense is not caused in the high aggregation level region of additional allocation yet.
In the present embodiment, network side has the ability in separate configurations height aggregation level region, can be the extra free degree of scheduling increase and flexibility, and network side can flexibly be held to this configuration.Network side can also configure high aggregation level region and be partially overlapped with oligomerization rank region, depending on network scheduling.Due to each UE separate configurations, it can at least ensure the high aggregation level region that some UE cannot not possess overlappingly, so as to obtain the reduction of system congestion probability.
In another embodiment, the first aggregation level region is multiple, and the second aggregation level region is one.
Fig. 6 is another exemplary plot of the search space configuration of the embodiment of the present invention.As shown in fig. 6, a public high aggregation level region can be defined, the region will be monitored by all UE for being configured with centralized ePDCCH.All UE control signaling is accommodated because the region is likely to require, therefore more Physical Resource Block pair can be reserved in public high aggregation level region, scheduled Physical Resource Block will not bring the wasting of resources to that can be used by PDSCH, therefore even if many reserved resources yet.
In the present embodiment, network side will configure a public high aggregation level region and the special oligomerization rank regions of a UE for UE, UE high aggregation level candidates of blind check in public high aggregation level region, the blind check oligomerization rank candidate in the special oligomerization rank regions of UE.
From above-described embodiment, by the way that the resource region of enhanced Physical Downlink Control Channel is divided into high aggregation level region and oligomerization rank region, the blocking rate of control channel can be reduced, and do not produce extra control channel expense.Embodiment 3
On the basis of embodiment 1,2, multiplexing of the embodiment of the present invention to distributed ePDCCH and centralization ePDCCH is illustrated.In the present invention, it is that the centralized ePDCCH of high aggregation level configures independent eCCE/PRB resources, not only contributes to reduce centralized ePDCCH blocking probability, be actually also beneficial to reduce the collision with distribution ePDCCH.
In the present embodiment, the lateral user equipment side in base station sends the configuration information of centralized enhanced Physical Downlink Control Channel, and actual downstream control information（DCI, Downlink Control Indicator), configure centralization ePDCCH resources.The ePDCCH resources configured include the first aggregation level region and the second aggregation level region, the aggregation level that wherein the second aggregation level region is included can take one or more Physical Resource Block pair, and the lateral user equipment side in base station sends distribution ePDCCH configuration information and DCI.
Fig. 7 is the schematic diagram that centralized ePDCCH and distribution PDCCH is collided, and is not centralized ePDCCH separate configurations height aggregation level region.As shown in Figure 7,4 Physical Resource Block are to being configured to distributed ePDCCH regions, 4 same Physical Resource Block are to being also configured as centralized ePDCCH regions, to provide certain probability Distribution and Centralization ePDCCH is multiplexed in a Physical Resource Block internally, so as to improve the level of resources utilization.
As shown in fig. 7, shadow pattern represents ePDCCH candidates.Fig. 7 assumes that network side is not
Centralized ePDCCH separate configurations height aggregation level region, therefore all ePDCCH candidates (ALU AL2, AL4) are all located at this 4 Physical Resource Block internally, now in the presence of the collision problem of centralized AL4 candidates and distribution ePDCCH candidates.Assuming that a distribution ePDCCH is dispatched, then the ePDCCH will be dispersed to all 4 Physical Resource Block pair.As shown in shade in Fig. 7 distributions ePDCCH regions, 4 enhanced resource grains subgroups of numbering 0,4,8,12（EREG, enhanced RE Group) form a distribution ePDCCH, on this basis, AL1, AL2 centralized ePDCCH candidates are it is possible to be multiplexed into this 4 Physical Resource Block centerings, but AL4 centralized ePDCCH will be completely blocked due to resource contention.As a same reason, when AL4 centralizations ePDCCH obtains scheduling, it will block to fall all distributed ePDCCH candidates of this 4 Physical Resource Block centerings.
Therefore, the collision problem between distributed ePDCCH and the high aggregation level candidates of centralization ePDCCH is to influence a subject matter of Distribution and Centralization ePDCCH multiplexings.
And in the present embodiment, network side is capable of separate configurations centralization ePDCCH high and low aggregation level region, high aggregation level region can be configured to and the non-intersect folded resource location in distribution ePDCCH regions（It according to dispatch situation, may partly overlap, but at least ensure that some UE high aggregation level region is not overlapped with Distributed Area）, so that collision free, in addition can be by oligomerization level region configuration of territory to the resource location with distributed ePDCCH area coincidences, fully to excavate the high level of resources utilization that Distribution and Centralization ePDCCH multiplexings can be brought.
In one embodiment, the resource region of distributed enhanced Physical Downlink Control Channel is not overlapped with the second aggregation level region.
Fig. 8 is the centralized ePDCCH and distribution ePDCCH of the embodiment of the present invention region configuration schematic diagram, a kind of search space allocation plan when considering Distribution and Centralization ePDCCH multiplexings is given, equivalent to the position relationship added on the basis of the high aggregation level region signals of centralization ePDCCH in Figure 5 with distribution ePDCCH regions.
As shown in Fig. 8, for centralized ePDCCH, high aggregation level region is non-intersect folded with distribution ePDCCH regions, to avoid the collision between different type candidate from blocking；Oligomerization rank region is overlapped with distribution ePDCCH regions, to support Distribution and Centralization ePDCCH multiplexing, improves resource utilization.
Fig. 9 is the centralized ePDCCH and distribution ePDCCH of the embodiment of the present invention another region configuration schematic diagram, equivalent to the high aggregation level region signals of centralization ePDCCH in figure 6
On the basis of add and the position relationship in distribution ePDCCH regions.
As shown in figure 9, the situation for being configured with public high aggregation level region, equally, high aggregation level region be not overlapping with distributed ePDCCH regions.
In another embodiment, the resource region of distributed enhanced Physical Downlink Control Channel includes reserved area and public domain；The public domain is not overlapped with the first aggregation level region or the second aggregation level region；The second aggregation level region is not overlapped with the public domain or reserved area.
In the present embodiment, for distributed ePDCCH, to improve the level of resources utilization, two class regions can be divided into：One is public domain, and all UE can detect ePDCCH candidates wherein, and the region is only capable of being multiplexed distributed ePDCCH, to ensure distributed transmission performance to greatest extent；Region exclusive one UE of configuration, is used when public domain off-capacity in addition, and the region can support centralization to be multiplexed with distribution ePDCCH.
Figure 10 is the centralized ePDCCH and distribution ePDCCH of the embodiment of the present invention another region configuration schematic diagram.The situation in two class regions is divided into for distributed ePDCCH, Figure 10 gives the configuration of centralized ePDCCH search spaces, and centralized high aggregation level region is not overlapping with any Distributed Area, to reduce collision obstruction；Distributed public domain is not overlapping with any centralized region, to ensure distributed transmission performance to greatest extent；Centralized oligomerization rank region can be overlapping with the exclusive regions of distributed UE, to support centralization to be multiplexed with distribution ePDCCH, improves resource utilization.
Figure 11 is the centralized ePDCCH and distribution ePDCCH of the embodiment of the present invention another region configuration schematic diagram.The situation in public high aggregation level region is configured with similarly, for centralized ePDCCH, Figure 11 gives the relation with distribution ePDCCH regions.
Figure 12 is the exemplary plot of centralized ePDCCH and distribution ePDCCH the physical resource configuration of the embodiment of the present invention, and the logical resource distribution with Figure 10 is corresponding.Relative to the logical resource configuration above provided, Figure 12 gives the configuration example in actual physical resource.The similar physical resource correspondence that can obtain other assignment of logical, is no longer enumerated.
10MHz system bandwidths are assumed in Figure 12, each RBG (Resource Block Group) includes 3 Physical Resource Block pair, and each SB (Subband) includes 6 Physical Resource Block pair.Tried one's best for the ePDCCH regionals distributed and fill up a RBG, the influence to PDSCH resource allocations can be so reduced as far as possible, the influence to lowest version UE PDSCH transmissions is also reduced.
As shown in figure 12, it is that the distributed exclusive regions of ePDCCH UE and centralization ePDCCH oligomerization ranks region are assigned with 4 Physical Resource Block pair of identical in figure, to support the two to be multiplexed.The centralized high aggregation level regions of ePDCCH and distribution ePDCCH public domains independently occupy non-intersect folded Physical Resource Block pair.
In the present embodiment, in the case where considering Distribution and Centralization ePDCCH multiplexing scenes, be conducive to reducing the blocking probability between centralized ePDCCH and distribution ePDCCH.Embodiment 4
On the basis of embodiment 3, multiplexing of the embodiment of the present invention to distributed ePDCCH and centralization ePDCCH is illustrated.
In the present embodiment, base station sends the configuration information of centralized enhanced Physical Downlink Control Channel to user equipment, configures ePDCCH resources, and actual ePDCCH is carried out afterwards and is sent.The ePDCCH resources region configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included can take one or more Physical Resource Block pair.Base station also sends distributed enhanced Physical Downlink Control Channel to user equipment, needs also exist for first sending distributed ePDCCH configuration informations.
In the present embodiment, the progress for ePDCCH in standardisation, determines that network side needs to configure some ePDCCH set for UE at present, and informs that the set is used for distributed or localized transmission.
In the present embodiment, by the configuration gathered ePDCCH, for a certain UE, the ePDCCH types of required detection can include three kinds of situations：Blind check distribution ePDCCH, a blind check centralization ePDCCH, while the centralized and distributed ePDCCH of blind check.EPDCCH can be used to gather to realize the configuration to the centralized ePDCCH high and low zone of convergency, for example, UE configures two centralization ePDCCH set, and wherein first set is configured as oligomerization rank region, second set is used as high aggregation level region.
In one embodiment, it is that UE configures three ePDCCH set：First set is centralization ePDCCH the first aggregation level region, and second set is centralization ePDCCH the second aggregation level region, and the 3rd collection is combined into the resource region of distributed enhanced Physical Downlink Control Channel.
Obtaining the UE of the configuration needs the blind check simultaneously in same subframe centralized and distributed
EPDCCH, now UE only carries out the blind check of AL8 candidates for distributed ePDCCH, and ePDCCH set that should be comprising AL8 can be located inside distribution ePDCCH public domains, to strive for obtaining the multiplexing with other distributed ePDCCH, UE needs to carry out the blind check of AL1, AL2 and AL4 candidate for centralized ePDCCH.
In another embodiment, it is that UE configures two ePDCCH set：Two set both function as centralized ePDCCH transmission, and first set is the first aggregation level region, and second set is the second aggregation level region.
UE only blind check centralization ePDCCH under the configuration, it is assumed that UE only blind check AL1, AL2, AL4, therefore give AL4 blind check number of times and can increase to 4 times；If it is assumed that UE blind checks whole AL1, AL2, AL4, AL8, the blind check number of times for then still following 6,6,2,2 is distributed, it is constant with the blind check number of times for ensureing total, while second set includes AL4 and AL8 candidate, it is used as high aggregation level region.
In another embodiment, it is that UE configures two ePDCCH set：Two set both function as distributed ePDCCH transmission, therefore UE only blind check distribution ePDCCH, and the blind check number of times of tradition 6,6,2,2 is divided equally in can gathering at two, and each set includes the ePDCCH candidates of AL1,2,4,8.
Table 3 shows above-mentioned situation.Schematically illustrated it is worth noting that, these are only, but the invention is not restricted to this.
Table 3
Only blind check point ePDCCH gathers flute --- and suffer from A flutes one and suffer from A
Zhu p mouthful p --- Zhu mouthful
Cloth is divided
(AL1、 2、 4、 8) (AL1、 2、 4、 8)
ePDCCH
Blind check number of times distribution 3,3,1,13,3,1,1
Only blind check collection ePDCCH gathers first set second set
Chinese style is divided
EPDCCH (oligomerization level region (high aggregation level areas
Domain, AL1,2) domain, AL4)
Blind check number of times distribution 6,64
Blind check ePDCCH set first set second sets flute two is suffered from A p ^ Zhu ^ mouthful distribution and divided simultaneously
(oligomerization level region (high aggregation level area (distributed ePDCCH centralizations
Domain, AL1,2) domain, AL4) region, AL8) ePDCCH
Blind check number of times distribution 6,622
From above-described embodiment, the configuration to centralized ePDCCH height aggregation level region can be realized by ePDCCH set, as it was previously stated, the configuration can reduce the blocking rate of control channel, and extra control channel expense is not produced.Embodiment 5
The embodiment of the present invention provides a kind of transmission method of control information, applied to user equipment side.Repeated no more with the identical content of embodiment 1 to 4.Figure 13 is the schematic flow sheet of the transmission method of the embodiment of the present invention, as shown in figure 13, and the transmission method includes：
Walk rapid 1301, user equipment receives the configuration information for the centralized enhanced Physical Downlink Control Channel that base station is sent, the centralized enhanced physical downlink control channel resource region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included can take one or more Physical Resource Block pair；
Walk rapid 1302, user equipment is detected to receive the centralized enhanced Physical Downlink Control Channel of base station transmission in the centralized enhanced physical downlink control channel resource configured to search space.
In one embodiment, the first aggregation level region and the second aggregation level region are not present overlapping.For example, the first aggregation level region is the oligomerization rank region that aggregation level is 1 and/or 2；Second aggregation level region is the high aggregation level region that aggregation level is 4 and/or 8.
In the present embodiment, hold row Walk it is rapid 1302 when, user equipment to high aggregation level carry out blind check when, will not be retrieved in oligomerization rank region；Vice versa, and user equipment will not be retrieved when carrying out blind check to oligomerization rank in high aggregation level region.
In another embodiment, there is part and overlap in the first aggregation level region and the second aggregation level region.
In the present embodiment, enhanced Physical Downlink Control Channel is centralized enhanced Physical Downlink Control Channel；The transmission method can also include：User equipment receives the distributed enhanced Physical Downlink Control Channel that base station is sent.
Wherein, enhanced physical downlink control channel resource is configurable to three set：First set is centralization ePDCCH the first aggregation level region, and second set is centralization ePDCCH the second aggregation level region, and the 3rd collection is combined into distributed ePDCCH resource region；
User equipment under the configuration detects centralized enhanced Physical Downlink Control Channel and distributed enhanced Physical Downlink Control Channel simultaneously.The detection number of times of aggregation level 1 is that the detection number of times that the detection number of times of aggregation level 2 in 6, first set is aggregation level 4 in 6, second set is 2 in first set;The detection number of times of aggregation level 8 is 2 in 3rd set.
Or, enhanced Physical Downlink Control Channel is configurable to two set：Two set both function as centralized ePDCCH transmission, and first set is that the first aggregation level region, second set are the second aggregation level region；
User equipment under the configuration only detects centralized enhanced Physical Downlink Control Channel.Wherein, the detection number of times of aggregation level 1 is 6 in first set, and the detection number of times of aggregation level 2 is that the detection number of times of aggregation level 4 in 6, second set is 4 in first set.
Or, enhanced Physical Downlink Control Channel is configurable to two set：Two set both function as distributed ePDCCH transmission, and the user equipment under the configuration only detects distributed enhanced Physical Downlink Control Channel.Wherein, the detection number of times that the detection number of times of aggregation level 1,2,4,8 is respectively aggregation level 1,2,4,8 in 3,3,1,1, second set in first set is respectively 3,3,1,1.
From above-described embodiment, centralized enhanced physical downlink control channel resource is divided into high aggregation level region and oligomerization rank region, therefore user's dedicated search space also will obtain separate configurations according to aggregation level, search space is carried out to the separation on physical resource according to aggregation level height, the blocking rate of control channel can be reduced, and does not produce extra control channel expense.Embodiment 6
The embodiment of the present invention provides a kind of base station, and corresponding to the transmission method of the control information of embodiment 1 to 4, identical content is repeated no more.
Figure 14 is the composition schematic diagram of the base station of the embodiment of the present invention.As shown in figure 14, base station 1400 includes：First transmitting element 1401 and the second transmitting element 1402;The other parts of base station 1400 may be referred to prior art, and here is omitted.
Wherein, first transmitting element 1401 is used for the configuration information that enhanced Physical Downlink Control Channel is sent to user equipment, the centralized ePDCCH resources region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included takes one or more Physical Resource Block pair.Second transmitting element 1402 is in configuration
The rear line equipment that comes into force sends centralized enhanced Physical Downlink Control Channel.
Wherein, the enhanced Physical Downlink Control Channel is centralized enhanced Physical Downlink Control Channel；First transmitting element 1401 can be also used for sending the configuration information of distributed enhanced Physical Downlink Control Channel to user equipment, and second transmitting element 1402 can be also used for sending distributed enhanced Physical Downlink Control Channel to user equipment.Embodiment 7
The embodiment of the present invention also provides a kind of user equipment, corresponding to the transmission method of the control information of embodiment 5, and identical content is repeated no more.
Figure 15 is the composition schematic diagram of the user equipment of the embodiment of the present invention.As shown in figure 15, base station 1500 includes：First receiving unit 1501 and the second receiving unit 1502;The other parts of user equipment 1500 may be referred to prior art, and here is omitted.
Wherein, first receiving unit 1501 receives the configuration information for the centralized enhanced Physical Downlink Control Channel that base station is sent, the centralized ePDCCH resources region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, wherein the aggregation level that the second aggregation level region is included takes one or more Physical Resource Block pair；Second receiving unit 1502 is detected to receive the centralized enhanced Physical Downlink Control Channel of base station transmission in the ePDCCH resources configured to search space.
In the specific implementation, first receiving unit 1501 can be also used for receiving the configuration information for the distributed enhanced Physical Downlink Control Channel that base station is sent, and the second receiving unit 1502 can be also used for receiving the distributed enhanced Physical Downlink Control Channel that base station is sent.
The embodiment of the present invention also provides a kind of communication system, and the communication system includes the base station as described in embodiment 6, and user equipment as described in Example 7.
The embodiment of the present invention also provides a kind of computer-readable program, wherein when performing described program in a base station, described program causes computer to perform the transmission method of the control information as described in example 1 above to 4 in the base station.
The embodiment of the present invention also provides a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmission method of the control information described in example 1 above to 4 in a base station.
The embodiment of the present invention also provides a kind of computer-readable program, wherein when holding in a user device
During row described program, described program causes computer to perform the transmission method of the control information as described in example 5 above in the user equipment.
The embodiment of the present invention also provides a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmission method of the control information described in example 5 above in a user device.
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 relates to such computer-readable program, when the program is performed by logical block, the logical block can be made to realize devices described above or component parts, or the logical block is realized that various side Fa Huo Walk described above are rapid.The invention further relates to the storage medium for storing procedure above, such as hard disk, disk, CD, DVD, flash memory.
For one or more combinations of one or more of function box described in accompanying drawing and/or function box, it is possible to achieve be general processor, the digital signal processor for performing function described herein（DSP), application specific integrated circuit（ASIC), field programmable gate array（) or other PLDs, discrete gate or transistor logic, discrete hardware components or it is any appropriately combined FPGA.One or more combinations of one or more of function box described for accompanying drawing and/or function box, it is also implemented as the combination of computing device, for example, the combination of DSP and microprocessor, multi-microprocessor, communicate with DSP the one or more microprocessors combined or any other this configuration.
Above in association with specific embodiment, invention has been described, it will be appreciated by those skilled in the art that these descriptions are all exemplary, it is not limiting the scope of the invention.Those skilled in the art can make various variants and modifications to the present invention according to spirit and principles of the present invention, and these variants and modifications are also within the scope of the invention.
Claims (30)
- Standing grain ' " ^1st, a kind of transmission method of control information, the transmission method includes：Base station sends the configuration information of centralized enhanced Physical Downlink Control Channel to user equipment；Wherein, the centralized enhanced physical downlink control channel resource region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, and the aggregation level that the second aggregation level region is included takes one or more Physical Resource Block pair；The base station sends the centralized enhanced Physical Downlink Control Channel to the user equipment.2nd, transmission method according to claim 1, wherein, aggregation level does not take a Physical Resource Block pair in the first aggregation level region；The first aggregation level region and the second aggregation level region are not present overlapping.3rd, transmission method according to claim 2, wherein, the first aggregation level region is the oligomerization rank region that aggregation level is 1 and/or 2；The second aggregation level region is the high aggregation level region that aggregation level is 4 and/or 8.4th, transmission method according to claim 1, wherein, there is part and overlap in the first aggregation level region and the second aggregation level region.5th, transmission method according to claim 1, wherein, multiple user equipmenies share the first aggregation level region and the second aggregation level region.6th, transmission method according to claim 5, wherein, the first aggregation level region and the second aggregation level region are multiple；Or the first aggregation level region is that multiple, described second aggregation level region is one.7th, the transmission method according to any one of claim 1 to 6, wherein, the transmission method also includes：Base station sends the configuration information of distributed enhanced Physical Downlink Control Channel, and the distributed enhanced Physical Downlink Control Channel to user equipment.8th, transmission method according to claim 7, wherein, resource region and the second aggregation level region of the distributed enhanced Physical Downlink Control Channel are not overlapped.9th, transmission method according to claim 7, wherein, the resource region that the configuration information of the distributed enhanced Physical Downlink Control Channel is configured includes reserved area and public domain； The public domain is not overlapped with the first aggregation level region and the second aggregation level region；The second aggregation level region is not overlapped with the public domain and the reserved area.10th, the transmission method according to any one of claim 1 to 6, wherein, enhanced Physical Downlink Control Channel is configured to three set：First set is the first aggregation level region of the centralized enhanced Physical Downlink Control Channel, second set is the second aggregation level region of the centralized enhanced Physical Downlink Control Channel, and the 3rd collection is combined into the resource region of the distributed enhanced Physical Downlink Control Channel；Or enhanced Physical Downlink Control Channel is configured to two set：First set is the first aggregation level region of the centralized enhanced Physical Downlink Control Channel, and second set is the second aggregation level region of the centralized enhanced Physical Downlink Control Channel.11st, a kind of transmission method of control information, the transmission method includes：User equipment receives the configuration information for the centralized enhanced Physical Downlink Control Channel that base station is sent；Wherein, the centralized enhanced physical downlink control channel resource region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, and the aggregation level that the second aggregation level region is included takes one or more Physical Resource Block pair；The user equipment is detected to receive the centralized enhanced Physical Downlink Control Channel of base station transmission in the centralized enhanced physical downlink control channel resource that the configuration information is configured to search space.12nd, transmission method according to claim 11, wherein, aggregation level does not take a Physical Resource Block pair in the first aggregation level region；The first aggregation level region and the second aggregation level region are not present overlapping.13rd, transmission method according to claim 12, wherein, the first aggregation level region is the oligomerization rank region that aggregation level is 1 and/or 2；The second aggregation level region is the high aggregation level region that aggregation level is 4 and/or 8.14th, transmission method according to claim 13, wherein, when the user equipment is detected to high aggregation level, do not detected in the oligomerization rank region；Or, when the user equipment is detected to oligomerization rank, do not detected in the high aggregation level region.15th, transmission method according to claim 11, wherein, the first aggregation level area It is overlapping to there is part in domain and the second aggregation level region.16th, the transmission method according to any one of claim 11 to 15, wherein, the transmission method also includes：The user equipment receives the configuration information for the distributed enhanced Physical Downlink Control Channel that base station is sent, and the distributed enhanced Physical Downlink Control Channel.17th, transmission method according to claim 16, wherein, the user equipment detects the centralized enhanced Physical Downlink Control Channel and the distributed enhanced Physical Downlink Control Channel simultaneously；Wherein, enhanced Physical Downlink Control Channel is configured to three set：First set is the first aggregation level region of the centralized enhanced Physical Downlink Control Channel, second set is the second aggregation level region of the centralized enhanced Physical Downlink Control Channel, and the 3rd collection is combined into the resource region of the distributed enhanced Physical Downlink Control Channel.18th, transmission method according to claim 17, wherein, the detection number of times of aggregation level 1 is 6 in the first set, the detection number of times of aggregation level 2 is 6 in the first set, the detection number of times of aggregation level 4 is 2 in the second set, and the detection number of times of aggregation level 8 is 2 in the 3rd set.19th, transmission method according to claim 16, wherein, the user equipment only detects the centralized enhanced Physical Downlink Control Channel；Wherein, enhanced Physical Downlink Control Channel is configured to two set, and described two set are used to centralized enhanced physical downlink control channel transmission；First set is the first aggregation level region of the centralized enhanced Physical Downlink Control Channel, and second set is the second aggregation level region of the centralized enhanced Physical Downlink Control Channel.20th, transmission method according to claim 19, wherein, the detection number of times of aggregation level 1 is that the detection number of times that the detection number of times of aggregation level 2 in 6, the first set is aggregation level 4 in 6, the second set is 4 in the first set.21st, transmission method according to claim 16, wherein, the user equipment only detects the distributed enhanced Physical Downlink Control Channel；Wherein, enhanced Physical Downlink Control Channel is configured to two set, and described two set are used to distributed enhanced physical downlink control channel transmission.22nd, transmission method according to claim 21, wherein, the detection number of times of aggregation level 1,2,4,8 is respectively 3,3,1,1 in the first set, polymer grade in the second set Other 1,2,4,8 detection number of times is respectively 3,3,1,1.23rd, a kind of base station, the base station includes：First transmitting element, the configuration information of centralized enhanced Physical Downlink Control Channel is sent to user equipment；Wherein, the centralized enhanced physical downlink control channel resource region that the configuration information is configured includes the first aggregation level region and the second aggregation level region, and the aggregation level that the second aggregation level region is included takes one or more Physical Resource Block pair；Second transmitting element, sends the centralized enhanced Physical Downlink Control Channel.24th, base station according to claim 23, wherein, first transmitting element is additionally operable to send the configuration information of distributed enhanced Physical Downlink Control Channel to user equipment；Second transmitting element is additionally operable to send distributed enhanced Physical Downlink Control Channel.25th, a kind of user equipment, the user equipment includes：First receiving unit, receive the configuration information for the centralized enhanced Physical Downlink Control Channel that base station is sent, the centralized enhanced physical downlink control channel resource region that wherein described configuration information is configured includes the first aggregation level region and the second aggregation level region, and the aggregation level that the second aggregation level region is included takes one or more Physical Resource Block pair；Second receiving unit, in the centralized enhanced physical downlink control channel resource that the configuration information is configured, is detected to receive the centralized enhanced Physical Downlink Control Channel of base station transmission to search space.26th, user equipment according to claim 25, wherein,First receiving unit is additionally operable to receive the configuration information for the distributed enhanced Physical Downlink Control Channel that base station is sent, and second receiving unit is additionally operable to receive the distributed enhanced Physical Downlink Control Channel.27th, a kind of communication system, the communication system includes the base station as described in claim 23 or 24, and the user equipment as described in claim 25 or 26.28th, a kind of computer-readable program, wherein when performing described program in a base station, described program causes computer to perform the transmission method of the control information as any one of claim 1 to 10 in the base station.29th, a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmission method of the control information as any one of claim 1 to 10 in a base station. 30th, a kind of computer-readable program, wherein when performing described program in a user device, described program causes computer to perform the transmission method of the control information as any one of claim 11 to 22 in the user equipment.31st, a kind of storage medium for the computer-readable program that is stored with, wherein the computer-readable program causes computer to perform the transmission method of the control information as any one of claim 11 to 22 in a user device.
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| PCT/CN2012/081746 WO2014043890A1 (en) | 2012-09-21 | 2012-09-21 | Transmission method for control information, user equipment and base station |
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