CN109756312A - A kind of setting method and device of PDCCH search space - Google Patents
A kind of setting method and device of PDCCH search space Download PDFInfo
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Abstract
This application provides a kind of setting method of PDCCH search space and devices, and applied to including a pair of FDD carrier wave in the FDD cell of at least one pilot frequency point carrier wave, the pilot frequency point carrier wave is upstream auxiliary carriers；For the upstream auxiliary carriers that cannot be dispatched by the PDCCH in PDCCH search space in control domain, resource is distributed on the data field of descending carrier, constitutes the corresponding data field PDCCH search space of the upstream auxiliary carriers；For the UE for accessing the FDD cell, if the upstream auxiliary carriers that the UE is distributed in the base station have corresponding data field PDCCH search space, the UE is given in the resource distribution that then the data field PDCCH search space is occupied, and the UE is made to monitor the PDCCH being mapped in the resource in data field.This method is able to solve the problem of FDD intra-cell uplink bandwidth demand is far longer than the demand of downlink bandwidth.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of Physical Downlink Control Channel (PDCCH) search space
Setting method and device.
Background technique
Currently, frequency division duplex (FDD) cell has a pair of of carrier wave: up-link carrier and downlink in LTE system in 3GPP agreement
Carrier wave.Descending carrier sends PSS, SSS and PBCH.User terminal (UE), can be with by PSS and SSS on detection descending carrier
Know the wireless frame timing and subframe timing of the physical-layer cell ID of cell, the duplex mode of cell and cell.
UE can determine the low sum-bit cell downlink transmit antenna port of radio frames frame number in cell by detecting PBCH
Number, can be known by the MIB carried on PBCH: the downlink bandwidth of cell, the group number of PHICH and cell radio frames frame number
Most-significant byte.
After obtaining above- mentioned information, UE can receive PCFICH in each downlink subframe, according to what is carried on PCFICH
Control format instruction (Control Format Indicator, CFI) determines the length of current subframe control area.
UE can detect PDCCH:UE by detecting in current subframe control area in the corresponding search space PDCCH
The scrambled PDCCH of SI-RNTI, SIB1 and other each SIB can be obtained, all configurations of cell are obtained from these SIB
Information；UE, which passes through the scrambled PDCCH of P-RNTI detected, can obtain paging information；UE in RRC_CONNECTED is logical
Upstream or downstream dynamic scheduling information can be obtained by crossing the scrambled PDCCH of detection C-RNTI；Pass through detection SPS C-RNTI scrambling
PDCCH can obtain upstream or downstream semi-persistent scheduling information；By detecting the other kinds of scrambled PDCCH of RNTI, UE
Other kinds of information can also be obtained, such as: after having sent PRACH in the random access procedure, UE passes through detection RA-
The scrambled PDCCH of RNTI can obtain the scheduling information of RAR；When receiving the MBMS business sent by MBSFN mode, UE is logical
MCCH notice of change can be obtained by crossing the scrambled PDCCH of detection M-RNTI；In the MBMS industry that reception is sent by SC-PTM mode
When business, UE can obtain SC-MCCH notice of change by detecting the scrambled PDCCH of SC-RNTI.
UE in RRC_CONNECTED is after detecting the scrambled PDCCH of C-RNTI, according to what is carried on PDCCH
Specific dynamic scheduling information can execute corresponding processing: when carrying uplink dynamic scheduling information on PDCCH, UE is according to the tune
It spends information and sends PUSCH, and on the PHICH fed back according to the sequential relationship reception eNodeB between PUSCH and PHICH, PHICH
Carry the ACK/NACK information of TB on PUSCH；When bearing downlink dynamic scheduling information on PDCCH, UE is according to the scheduling information
PDSCH is received, and PUCCH is sent according to the sequential relationship between PDSCH and PUCCH, TB on PDSCH is carried on PUCCH
ACK/NACK information.
UE in RRC_CONNECTED is held after detecting the scrambled PDCCH of SPS C-RNTI according on PDCCH
The specific semi-persistent scheduling information carried can execute corresponding processing: when carrying uplink semi-persistent scheduling active information on PDCCH
When, UE determines the resource distribution of semi-static PUSCH according to the information, and according to configuration information periodicity sending PUSCH, each
PUSCH sends according to this PUSCH that the sequential relationship between PUSCH and PHICH receives eNodeB feedback after sending and corresponds to
PHICH, the ACK/NACK information of TB on this PUSCH is carried on PHICH；When bearing downlink semi-persistent scheduling swashs on PDCCH
When information living, UE determines the resource distribution of semi-static PDSCH according to the information, and according to configuration information periodic receipt PDSCH,
PUCCH is sent according to the sequential relationship between PDSCH and PUCCH after receiving PDSCH every time, carries this on PUCCH
The ACK/NACK information of the upper TB of PDSCH.
The general introduction of the above-mentioned each function of being executed for UE in FDD cell in LTE system.In actual networking, there are one
Kind business demand, if video uploads the demand of business, demand of the business demand to intra-cell uplink bandwidth is far longer than under
The demand of row bandwidth；Since FDD cell only has a pair of of carrier wave, it can not solve in practical application that upstream bandwidth demand is remote in cell
The problem of much larger than downlink bandwidth demand.
Summary of the invention
In view of this, the application provides the setting method and device of a kind of PDCCH search space, it is able to solve FDD cell
The problem of interior upstream bandwidth demand is far longer than the demand of downlink bandwidth.
In order to solve the above technical problems, the technical solution of the application is achieved in that
A kind of setting method of PDCCH search space, being applied to includes a pair of of Frequency Division Duplex FDD carrier wave and at least one is different
In the FDD cell of frequency point carrier wave, wherein a pair of of FDD carrier wave includes a descending carrier and a up-link carrier, descending carrier are
Unique descending carrier in the FDD cell, up-link carrier are the uplink main carriers in the FDD cell, and the pilot frequency point carrier wave is
The upstream auxiliary carriers of the FDD cell, the frequency point of the pilot frequency point carrier wave are different from the frequency point of a pair of FDD carrier wave；This method comprises:
For the upstream auxiliary carriers that cannot be dispatched by the PDCCH in PDCCH search space in control domain, in descending carrier
Resource is distributed on data field, constitutes the corresponding data field PDCCH search space of the upstream auxiliary carriers；
It is auxiliary that the PDCCH sent in the corresponding data field PDCCH search space of the upstream auxiliary carriers carries corresponding uplink
The uplink scheduling information of carrier wave；
For the UE for accessing the FDD cell, if the upstream auxiliary carriers that the UE is distributed in the base station have corresponding data field
The UE is given in PDCCH search space, the then resource distribution occupied the data field PDCCH search space, supervises the UE in data field
Listen the PDCCH being mapped in the resource.
A kind of setting device of PDCCH search space, being applied to includes a pair of of Frequency Division Duplex FDD carrier wave and at least one is different
In the FDD cell of frequency point carrier wave, wherein a pair of of FDD carrier wave includes a descending carrier and a up-link carrier, descending carrier are
Unique descending carrier in the FDD cell, up-link carrier are the uplink main carriers in the FDD cell, and the pilot frequency point carrier wave is
The upstream auxiliary carriers of the FDD cell, the frequency point of the pilot frequency point carrier wave are different from the frequency point of a pair of FDD carrier wave；The device includes:
First configuration unit, the second configuration unit and third configuration unit；
First configuration unit, cannot be by the scheduling of the PDCCH in PDCCH search space in control domain for being directed to
Row secondary carrier distributes resource on the data field of descending carrier, constitutes the corresponding data field PDCCH search of the upstream auxiliary carriers
Space；
Second configuration unit, for configuring in the corresponding data field PDCCH search space of the upstream auxiliary carriers
The PDCCH of transmission carries the uplink scheduling information of corresponding upstream auxiliary carriers；
The third configuration unit, for the UE for the access FDD cell, if the uplink that the UE is distributed in the base station is auxiliary
Carrier wave has the data field PDCCH search space of corresponding first configuration of described dispensing unit, then searches for data field PDCCH empty
Between the resource distribution that occupies to the UE, so that the UE is monitored the PDCCH being mapped in the resource in data field.
It as can be seen from the above technical solution, include a pair of FDD carrier wave and at least one pilot frequency point by introducing in the application
The FDD cell of carrier wave is far longer than using pilot frequency point carrier wave as upstream auxiliary carriers to solve FDD intra-cell uplink bandwidth demand
The problem of demand of downlink bandwidth；And newly proposed by way of increasing data field PDCCH search space to solve the application
The not enough problem of PDCCH search space in control domain on descending carrier in FDD cell.
Detailed description of the invention
Fig. 1 is PDCCH search space setting procedure schematic diagram in the embodiment of the present application one；
Fig. 2 is PDCCH search space setting procedure schematic diagram in the embodiment of the present application two；
Fig. 3 is PDCCH search space setting procedure schematic diagram in the embodiment of the present application three；
Fig. 4 is the apparatus structure schematic diagram for being applied to above-mentioned technology in the embodiment of the present application.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples,
Technical solution of the present invention is described in detail.
In order to solve in practical application, upstream bandwidth demand is far longer than downlink bandwidth need in cell in the embodiment of the present application
The problem of asking, be provided with a kind of FDD cell, relative in existing realization only include a pair of FDD carrier wave common FDD cell,
It is properly termed as special FDD cell, the FDD cell in the embodiment of the present application includes a pair of FDD carrier wave and at least one pilot frequency point
Carrier wave, wherein a pair of of FDD carrier wave includes a descending carrier and a up-link carrier, and descending carrier is unique in the FDD cell
Descending carrier, up-link carrier is the uplink main carrier in the FDD cell, and the pilot frequency point carrier wave is the uplink of the FDD cell
Secondary carrier, the frequency point of the pilot frequency point carrier wave are different from the frequency point of a pair of FDD carrier wave.
It is specific using the FDD frame structure in existing 3GPP agreement in the FDD cell provided in the embodiment of the present application:
Unique descending carrier and each up-link carrier all use the transmission of FDD frame structure progress relevant information.
Unique descending carrier executes the institute of descending carrier in common FDD cell in an identical manner in the FDD cell
Functional, unique uplink main carrier executes all of common FDD intra-cell uplink carrier wave in an identical manner in the cell
Function.In addition to this, unique descending carrier also needs to dispatch the resources of each upstream auxiliary carriers, Ge Geshang in the FDD cell
Row secondary carrier can provide ascending resource as uplink main carrier to UE in cell: uplink PRACH resource, PUSCH resource and
PUCCH resource.
In the practical application of the networking provided in the embodiment of the present application, type there are two types of the UE of the networking is accessed:
The first, common UE: this UE executes each function of UE in common FDD cell in the same manner.
For these UE, which is exactly a common FDD cell, which is only made of a pair of of FDD carrier wave: UE phase
The uplink of pass is sent on uplink main carrier and executes, and the relevant downlink transmission of UE is executed by unique descending carrier.Namely
It says and does not know the cell by this UE there are other upstream auxiliary carriers.
Second, the UE: this kind of UE for the FDD cell for supporting the application to propose is reported when accessing cell supports special FDD
The ability of cell.
If the cell of such UE access is common FDD cell, eNodeB ignores the capability reporting；If such UE access
Cell is special FDD cell, and eNodeB distributes up-link carrier to such UE according to the capability reporting: can be only in UE distribution
Row main carrier can also distribute multiple up-link carriers simultaneously to UE, on these carrier waves may include uplink main carrier or not include
Row main carrier.
For this kind of UE, after accessing special FDD cell, it is special that eNodeB is carried UE when distributing resource to UE
The instruction of FDD cell, or indicate that current area is special FDD cell in a manner of implying the up-link carrier of distribution, than
Such as: some up-link carrier and descending carrier of distribution are not the carrier waves of pairing.
Each embodiment of the application describes needed for second of UE (UE for supporting FDD cell provided by the embodiments of the present application)
The setting method of the PDCCH search space to be monitored.For convenience, it is directly described below using UE.
In FDD cell in the embodiment of the present application unique descending carrier need to dispatch the descending carrier resource, on
The resource of the resource of row main carrier and each upstream auxiliary carriers.Since the number of symbols that each subframe control area occupies is limited,
The PDCCH number that can be carried in PDCCH search space in control area is naturally limited.
It can be able to satisfy while the need of dispatching downlink carrier wave and up-link carrier in the number of common LTE FDD cell PDCCH
It asks, still, the dispatching requirement of the LTE FDD cell provided in the embodiment of the present application, newly-increased each upstream auxiliary carriers may
It can not be met by the PDCCH in existing PDCCH search space.
When the PDCCH number that PDCCH search space is capable of providing is unable to fully dispatch the resource in each upstream auxiliary carriers
When, the resource in each upstream auxiliary carriers is wasted.
With reference to the accompanying drawing, the setting up procedure of PDCCH search space in the embodiment of the present application is described in detail, to solve this Shen
The not enough problem of PDCCH search space in control domain on descending carrier in the networking that please be provide.
Embodiment one
It is PDCCH search space setting procedure schematic diagram in the embodiment of the present application one referring to Fig. 1, Fig. 1.Specific steps are as follows:
Step 101, base station is directed to the upstream auxiliary carriers that cannot be dispatched by the PDCCH in PDCCH search space in control domain,
Resource is distributed on the data field of descending carrier, constitutes the corresponding data field PDCCH search space of the upstream auxiliary carriers.
The resource distributed on the data field of descending carrier can be one or more RB.Each downlink subframe is divided into
Control domain and data field, the resource distributed on the data field of descending carrier here are distributed by granularity of a RB.
When PDCCH search space is only able to satisfy the descending scheduling of descending carrier and the uplink tune of uplink main carrier in control domain
When spending, or when not executing the scheduling of upstream auxiliary carriers, then it is described cannot be by the PDCCH tune in PDCCH search space in control domain
The upstream auxiliary carriers of degree include all upstream auxiliary carriers in the FDD cell.
When the search space of PDCCH in control domain is not enough to support the scheduling of descending scheduling and each up-link carrier, i.e.,
At least one upstream auxiliary carriers can be dispatched by the PDCCH of the search space of PDCCH in control domain, but institute can not be dispatched
It is when some upstream auxiliary carriers, then described to be by the upstream auxiliary carriers dispatched of the PDCCH in PDCCH search space in control domain
Upstream auxiliary carriers except the upstream auxiliary carriers that the FDD cell is dispatched by PDCCH search space in control domain.
Step 102, the PDCCH that base station is sent in the corresponding data field PDCCH search space of the upstream auxiliary carriers takes
Uplink scheduling information with corresponding upstream auxiliary carriers.
The uplink scheduling information includes: the dynamic scheduling information of PUSCH and the semi-persistent scheduling information of PUSCH.It is typical
Ground, the uplink scheduling information are carried by DCI format 0 or 4 on the PDCCH.
In the concrete realization, step 102, it may be arranged as searching in the corresponding data field PDCCH of the upstream auxiliary carriers
The PDCCH sent in rope space can also carry the uplink power control commands of PUSCH, PUCCH in corresponding upstream auxiliary carriers
Uplink power control commands and SRS (Sounding Reference Signal: detection reference signal) control information.Institute
The control information for stating SRS includes: that the uplink power control commands of SRS and SRS send request.The uplink power control of the PUSCH
System order, the uplink power control commands of PUCCH and SRS control information respectively by DCI format 3/3A on the PDCCH,
DCI format 3/3A and DCI format 3B is carried.
In the concrete realization, step 102, it may be arranged as searching in the corresponding data field PDCCH of the upstream auxiliary carriers
The PDCCH sent in rope space can also carry the down dispatch information for configuring the UE on the up-link carrier.The downlink tune
Spending information includes: the dynamic scheduling information of PDSCH and the semi-persistent scheduling information of PDSCH.The down dispatch information passes through institute
State on PDCCH it is various carry down dispatch informations DCI formats carry, such as: DCI format 1,1A, 1B, 1C, 1D, 2,2A, 2B,
2C、2D。
In specific implementation, the application provides the mode of three kinds of carrying information, and one is only carry corresponding upstream auxiliary carriers
Uplink scheduling information；One is the uplink scheduling informations for not only carrying corresponding upstream auxiliary carriers, also carry the corresponding auxiliary load of uplink
The control information of the uplink power control commands of PUSCH, the uplink power control commands of PUCCH and SRS on wave.One is not only
Carry the uplink power control of the corresponding uplink scheduling information of upstream auxiliary carriers, the uplink power control commands of PUSCH, PUCCH
The control information of order and SRS also carries the down dispatch information of UE of the configuration in the upstream auxiliary carriers.
In this step, one kind is selected in the mode that base station can carry information at above-mentioned three kinds, will be selected in the scene of needs
The carrying information mode selected is notified to related UE.Such as: for some UE, a upstream auxiliary carriers, the load are configured with to the UE
Wave has corresponding data field search space, and UE is needed to monitor PDCCH in the search space, in this scene, needs data field
The mode that search space carries information notifies UE.Here it is possible to UE is notified by dedicated signaling, and such as: pass through RRC connection reconfiguration
Message informing UE can also notify UE by common signaling, such as: by system message by the corresponding number of some upstream auxiliary carriers
All UE in cell are broadcast to according to the mode for carrying information on domain search spatially PDCCH.
In this step, one kind can be selected in the mode of above-mentioned three kinds carrying information, by the selection in 3GPP agreement
Carrying information mode give clear stipulaties.In this scene, the mode for notifying any UE to carry information is not needed.Because all
Support the UE of special FDD cell that can clearly know the mode for carrying information from 3GPP agreement and it is necessary to assist according to 3GPP
The regulation of view executes: UE needs to monitor related DCI format in the data field search space of corresponding upstream auxiliary carriers to obtain it
All kinds of control information of upper transmission.
Step 103, for access the FDD cell UE, if the upstream auxiliary carriers that the UE is distributed in the base station have it is corresponding
Data field PDCCH search space, the then resource distribution occupied the data field PDCCH search space give the UE, make the UE in number
The PDCCH being mapped in the resource is monitored according to domain.
When one UE access FDD cell, up-link carrier need to be distributed for the UE, if the upstream auxiliary carriers of the UE are distributed in base station
By the PDCCH scheduling of PDCCH search space in control domain, then existing realization is pressed, if the upstream auxiliary carriers of the UE are distributed in base station
It is dispatched by the PDCCH of data field PDCCH search space, then needs the resource distribution for occupying the data field search space to the UE,
It notifies the UE, monitors PDCCH on which or which RB of data field.
The resource distribution that the corresponding data field PDCCH search space of upstream auxiliary carriers is occupied can be with to the mode of UE are as follows:
(1), UE is notified by dedicated signaling, such as: pass through RRC connection reconfiguration message informing UE
(2), UE is notified by common signaling, such as: the corresponding data field of secondary carrier on some is searched by system message
The resource broadcast that rope spatially occupies is to UE all in cell.
In the present embodiment, PDCCH dispatching uplink main carrier and descending carrier in control domain in PDCCH search space
Specific implementation, compared with realization, no longer describes one by one here.
RB is distributed in the embodiment of the present application on the downstream carriers, constitutes the corresponding data field PDCCH of the upstream auxiliary carriers
Search space, there are two types of implementations, and being respectively as follows: cannot be dispatched to be each by the PDCCH in PDCCH search space in control domain
Upstream auxiliary carriers data field PDCCH search space is respectively set；For it is all cannot be by PDCCH search space in control domain
A shared data field PDCCH search space is arranged in the upstream auxiliary carriers of PDCCH scheduling, and specific implementation passes through embodiment two
It is described in detail with embodiment three.
Embodiment two
Base station is that cannot each be set respectively by the upstream auxiliary carriers dispatched of the PDCCH in PDCCH search space in control domain
Set data field PDCCH search space.
Referring to fig. 2, Fig. 2 is PDCCH search space setting procedure schematic diagram in the embodiment of the present application two.Specific steps are as follows:
Step 201, base station is auxiliary for each uplink that cannot be dispatched by the PDCCH in PDCCH search space in control domain
Carrier wave independently distributes resource on the data field of descending carrier, constitutes the corresponding data field PDCCH of each upstream auxiliary carriers
Search space.
In specific implementation, to be each upstream auxiliary carriers distribution resource as unit of RB in data field, different uplinks
The number for the RB that the corresponding data field search space of secondary carrier occupies can be the same, can also be different, can be with when specific implementation
According to the number for the UE that the bandwidth of corresponding upstream auxiliary carriers, the type of business demand of support and upstream auxiliary carriers allow to access
It is configured.
Step 202, base station is sent in the corresponding data field PDCCH search space of each upstream auxiliary carriers
PDCCH carries the uplink scheduling information of corresponding upstream auxiliary carriers.
In the present embodiment step 202, by taking configuration carries uplink scheduling information as an example, when specific implementation, it can also configure and take
Control with the uplink power control commands of PUSCH, the uplink power control commands of PUCCH and SRS in corresponding upstream auxiliary carriers
Information processed and the down dispatch information for configuring the UE on the up-link carrier.
Step 203, for access the FDD cell UE, if the upstream auxiliary carriers that the UE is distributed in the base station have it is corresponding
Data field PDCCH search space, the then resource distribution occupied the data field PDCCH search space give the UE, make the UE in number
The PDCCH being mapped in the resource is monitored according to domain.
Embodiment three
Base station is all upstream auxiliary carriers setting one that cannot be dispatched by the PDCCH in PDCCH search space in control domain
A shared data field PDCCH search space.
It is PDCCH search space setting procedure schematic diagram in the embodiment of the present application three referring to Fig. 3, Fig. 3.Specific steps are as follows:
Step 301, base station is auxiliary for all uplinks that cannot be dispatched by the PDCCH in PDCCH search space in control domain
Carrier wave distributes resource on the data field of descending carrier, constitutes the corresponding shared data domain PDCCH of all upstream auxiliary carriers
Search space.
In specific implementation, to be all upstream auxiliary carriers distribution resources, the number root of RB as unit of RB in data field
According to the type of business demand and each uplink supported in the bandwidth of corresponding each upstream auxiliary carriers, each upstream auxiliary carriers
Secondary carrier allows the number of the UE accessed to be configured.
Step 302, base station is sent in the corresponding shared data domain PDCCH search space of all upstream auxiliary carriers
PDCCH carries the uplink scheduling information of each upstream auxiliary carriers in all upstream auxiliary carriers.
In the present embodiment step 302, for configuring the uplink scheduling information for carrying each upstream auxiliary carriers, specific implementation
When, the uplink power control for carrying the uplink power control commands of PUSCH, PUCCH in each upstream auxiliary carriers can also be configured
The down dispatch information of UE of the control information and configuration of order and SRS on these up-link carriers.
Step 303, for access the FDD cell UE, if the upstream auxiliary carriers that the UE is distributed in the base station have it is corresponding
Data field PDCCH search space, the then resource distribution occupied the data field PDCCH search space give the UE, make the UE in number
The PDCCH being mapped in the resource is monitored according to domain.
The setting of middle data field PDCCH search space through the foregoing embodiment is able to solve FDD cell provided by the present application
The not enough problem of PDCCH search space in control domain on middle descending carrier.
In LTE FDD cell provided by the present application, for newly-increased data field PDCCH search space, in the space hold
Each RB on, have 16 EREG in each subframe, number from 0 to 15.36.211 agreement of 3GPP is shown in the definition of EREG.
The number for the enhancing resource unit group (EREG) that each enhancing control channel unit (ECCE) includes is in FDD frame structure
Lower related with the type of cyclic prefix, the EREG number that ECCE includes under different CP is shown in 3GPP TS36.211 agreement such as following table
Lattice:
Table 6.8A.1-1:Number of EREGs per ECCE,
Each PDCCH occupies one or more ECCE.Specifically, mode identical with EPDCCH can be used, is defined more
Kind PDCCH format, different PDCCH formats correspond to different number of ECCE.Various EPDCCH formats are in CASE A and CASE B
The ECCE number of lower occupancy see the table below.Below table is only intended to example: every kind of EPDCCH format corresponds to different ECCE numbers,
Therefore CASE A and CASE B are not illustrated.Wherein, ECCE is mapped to there are two types of the mapping modes of EREG: Localized
Transmission (centralization is sent) and Distributed transmission (distribution is sent).In data field PDCCH
Search space, the mapping mode that ECCE is mapped to EREG equally includes: Localized transmission (centralization is sent)
With Distributed transmission (distribution is sent).The mapping method of ECCE to EREG is shown under both mapping modes
3GPP agreement TS36.211 agreement.
Table 6.8A.1-2:Supported EPDCCH formats
Different DCI formats is carried on PDCCH, the bit number of the information content and occupancy that every kind of DCI format carries is logical
Chang Butong.According to the PDCCH DCI format used and the radio channel state of the corresponding UE of the PDCCH, determine that PDCCH should
The ECCE number of occupancy, to guarantee UE correct decoding PDCCH.Then, PDCCH format is selected to be sent according to ECCE number,
The ECCE number that the PDCCH format of selection occupies should be no less than the ECCE number that PDCCH should be occupied.
It is new to realize the method for ECCE or EREG can be mapped in its corresponding search space using existing EPDCCH
Increase the mapping of PDCCH to ECCE and EREG in PDCCH search space, kind that but not limited to this realizes the mode of mapping.
Increase the RB that PDCCH data field search space can be multiplexed the search space EPDCCH or MPDCCH occupancy in the application newly
Resource, it can PDCCH is sent in the search space of data field by EPDCCH or MPDCCH.
The setting device that a kind of PDCCH search space is also proposed based on same inventive concept, in the embodiment of the present application, is answered
For in the FDD cell including a pair of of Frequency Division Duplex FDD carrier wave and at least one pilot frequency point carrier wave, wherein a pair of of FDD carrier wave packet
A descending carrier and a up-link carrier are included, descending carrier is unique descending carrier in the FDD cell, and up-link carrier is this
Uplink main carrier in FDD cell, the pilot frequency point carrier wave are the upstream auxiliary carriers of the FDD cell, the pilot frequency point carrier wave
Frequency point is different from the frequency point of a pair of FDD carrier wave.Referring to fig. 4, Fig. 4 is the device knot for being applied to above-mentioned technology in the embodiment of the present application
Structure schematic diagram.The device includes: the first configuration unit 401, the second configuration unit 402 and third configuration unit 403；
First configuration unit 401, cannot be by the scheduling of the PDCCH in PDCCH search space in control domain for being directed to
Row secondary carrier distributes resource on the data field of descending carrier, constitutes the corresponding data field PDCCH search of the upstream auxiliary carriers
Space；
Second configuration unit 402, for configuring the number configured in corresponding first configuration unit 401 of the upstream auxiliary carriers
The uplink scheduling information of corresponding upstream auxiliary carriers is carried according to the PDCCH sent in the PDCCH search space of domain；
Third configuration unit 403, for the UE for the access FDD cell, if the uplink that the UE is distributed in the base station is auxiliary
The data field PDCCH search space that carrier wave has corresponding first configuration unit 401 to configure then searches for data field PDCCH empty
Between the resource distribution that occupies to the UE, so that the UE is monitored the PDCCH being mapped in the resource in data field.
The unit of above-described embodiment can integrate in one, can also be deployed separately；It can be merged into a unit, it can also
To be further split into multiple subelements.
In conclusion FDD cell of the application by introducing including a pair of FDD carrier wave and at least one pilot frequency point carrier wave,
Using pilot frequency point carrier wave as upstream auxiliary carriers, to solve the demand that FDD intra-cell uplink bandwidth demand is far longer than downlink bandwidth
The problem of；And it is carried by way of increasing data field PDCCH search space to solve downlink in the FDD cell that the application newly proposes
The not enough problem of PDCCH search space in control domain on wave.
And two kinds of increased modes of data field PDCCH search space are provided in specific implementation, one is on each
Row secondary carrier increases data field PDCCH search space, and one is increase for the upstream auxiliary carriers in need for increasing search space
One shared data field PDCCH search space.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (10)
1. a kind of setting method of physical downlink control channel PDCCH search space, which is characterized in that be applied to include a pair of of frequency
Divide in the FDD cell of duplex FDD carrier wave and at least one pilot frequency point carrier wave, wherein a pair of of FDD carrier wave includes a descending carrier
With a up-link carrier, descending carrier is unique descending carrier in the FDD cell, and up-link carrier is upper in the FDD cell
Row main carrier, the pilot frequency point carrier wave are the upstream auxiliary carriers of the FDD cell, and the frequency point of the pilot frequency point carrier wave is different from a pair
The frequency point of FDD carrier wave；This method comprises:
For the upstream auxiliary carriers that cannot be dispatched by the PDCCH in PDCCH search space in control domain, in the data of descending carrier
Resource is distributed on domain, constitutes the corresponding data field PDCCH search space of the upstream auxiliary carriers；
The PDCCH sent in the corresponding data field PDCCH search space of the upstream auxiliary carriers carries corresponding upstream auxiliary carriers
Uplink scheduling information；
For the UE for accessing the FDD cell, if the upstream auxiliary carriers that the UE is distributed in the base station have corresponding data field PDCCH to search
The UE is given in rope space, the then resource distribution occupied the data field PDCCH search space, is mapped to the UE in data field monitoring
PDCCH in the resource.
2. the method according to claim 1, wherein the method further includes:
The PDCCH sent in the corresponding data field PDCCH search space of the upstream auxiliary carriers also carries the corresponding auxiliary load of uplink
The control information of the uplink power control commands of PUSCH, the uplink power control commands of PUCCH and SRS on wave.
3. according to the method described in claim 2, it is characterized in that, the method further includes:
The PDCCH sent in the corresponding data field PDCCH search space of the upstream auxiliary carriers also carries configuration in the uplink
The down dispatch information of UE in secondary carrier.
4. the method according to claim 1, wherein the method further includes:
When the mode that data field search space carries information is notified UE, UE is notified by dedicated signaling；Or, passing through common signaling
Notify UE.
5. the method according to claim 1, wherein
When PDCCH search space is only able to satisfy the descending scheduling of descending carrier and the uplink scheduling of uplink main carrier in control domain
When, or when not executing the scheduling of upstream auxiliary carriers, then it is described to be dispatched by the PDCCH in PDCCH search space in control domain
Upstream auxiliary carriers include all upstream auxiliary carriers in the FDD cell；
It is when the search space of PDCCH in control domain is not enough to support the scheduling of descending scheduling and each up-link carrier, then described
The upstream auxiliary carriers that cannot be dispatched by the PDCCH in PDCCH search space in control domain are the FDD cell by control domain
Upstream auxiliary carriers except the upstream auxiliary carriers of PDCCH search space scheduling.
6. the method according to claim 1, wherein described be directed to the UE for accessing the FDD cell, if the base station point
The upstream auxiliary carriers of the dispensing UE have corresponding data field PDCCH search space, then occupy the data field PDCCH search space
Resource distribution give the UE, so that the UE is monitored the PDCCH that is mapped in the resource in data field, comprising:
For each upstream auxiliary carriers that cannot be dispatched by the PDCCH in PDCCH search space in control domain, in descending carrier
Resource is independently distributed on data field, constitutes the corresponding data field PDCCH search space of each upstream auxiliary carriers；
The PDCCH that the base station is sent in the corresponding data field PDCCH search space of the upstream auxiliary carriers is carried on corresponding
The uplink scheduling information of row secondary carrier, comprising:
It is auxiliary that the PDCCH sent in the corresponding data field PDCCH search space of each upstream auxiliary carriers carries corresponding uplink
The uplink scheduling information of carrier wave.
7. the method according to claim 1, wherein described be directed to the UE for accessing the FDD cell, if the base station point
The upstream auxiliary carriers of the dispensing UE have corresponding data field PDCCH search space, then occupy the data field PDCCH search space
Resource distribution give the UE, so that the UE is monitored the PDCCH that is mapped in the resource in data field, comprising:
For all upstream auxiliary carriers that cannot be dispatched by the PDCCH in PDCCH search space in control domain, in descending carrier
Resource is distributed on data field, constitutes the corresponding shared data domain PDCCH search space of all upstream auxiliary carriers；
The PDCCH that the base station is sent in the corresponding data field PDCCH search space of the upstream auxiliary carriers is carried on corresponding
The uplink scheduling information of row secondary carrier, comprising:
The PDCCH sent in the corresponding shared data domain PDCCH search space of all upstream auxiliary carriers carries the institute
There is the uplink scheduling information of each upstream auxiliary carriers in upstream auxiliary carriers.
8. method according to claim 1-7, which is characterized in that the method further includes:
It is logical by dedicated signaling when the resource distribution that the corresponding data field PDCCH search space of upstream auxiliary carriers is occupied is to UE
Know UE；Or, notifying UE by common signaling.
9. method according to claim 1-7, which is characterized in that the method further includes:
In data field PDCCH search space, the mapping mode that ECCE is mapped to EREG includes: that centralization is sent and distributed hair
It send.
10. a kind of setting device of physical downlink control channel PDCCH search space, which is characterized in that be applied to include a pair
In the FDD cell of Frequency Division Duplex FDD carrier wave and at least one pilot frequency point carrier wave, wherein a pair of of FDD carrier wave includes that a downlink carries
Wave and a up-link carrier, descending carrier are unique descending carriers in the FDD cell, and up-link carrier is in the FDD cell
Uplink main carrier, the pilot frequency point carrier wave are the upstream auxiliary carriers of the FDD cell, and the frequency point of the pilot frequency point carrier wave is different from one
To the frequency point of FDD carrier wave；The device includes: the first configuration unit, the second configuration unit and third configuration unit；
First configuration unit, for auxiliary for the uplink that cannot be dispatched by the PDCCH in PDCCH search space in control domain
Carrier wave distributes resource on the data field of descending carrier, and it is empty to constitute the corresponding data field PDCCH search of the upstream auxiliary carriers
Between；
Second configuration unit is sent in the corresponding data field PDCCH search space of the upstream auxiliary carriers for configuring
PDCCH carry the uplink scheduling informations of corresponding upstream auxiliary carriers；
The third configuration unit, for the UE for the access FDD cell, if the upstream auxiliary carriers of the UE are distributed in the base station
There is the data field PDCCH search space of corresponding first configuration of described dispensing unit, then accounts for the data field PDCCH search space
The UE is given in resource distribution, and the UE is made to monitor the PDCCH being mapped in the resource in data field.
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Application publication date: 20190514 |