CN110166203A

CN110166203A - Determination, detection method and device, base station and the terminal of Physical Downlink Control Channel

Info

Publication number: CN110166203A
Application number: CN201810151012.2A
Authority: CN
Inventors: 贺海港; 张晨晨; 郝鹏; 毕峰; 刘文豪
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2018-02-13
Filing date: 2018-02-13
Publication date: 2019-08-23

Abstract

A kind of determination of Physical Downlink Control Channel, detection method and device, base station and terminal, base station determine the PDCCH candidate that should retain in the PDCCH candidate of configuration；The base station selects a PDCCH candidate as the PDCCH for sending Downlink Control Information to terminal from the PDCCH candidate of reservation.After terminal determines the PDCCH candidate retained in the PDCCH candidate configured, the terminal is attempted to receive the Downlink Control Information that PDCCH channel is carried in the running time-frequency resource position of the PDCCH candidate of the reservation.Present invention also provides corresponding device, base station and terminals.The application avoids the limit of power of UE in such a way that PDCCH candidate abandons.

Description

Determination, detection method and device, base station and the terminal of Physical Downlink Control Channel

Technical field

This application involves cordless communication networks, determination, detection side more particularly, to a kind of Physical Downlink Control Channel Method and device, base station and terminal.

Background technique

In long term evolution (LTE:Long Term Evolution) and new generation of wireless access technology (NR, New RAT) In, Downlink Control Information passes through Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) Carrying, and under normal conditions, base station selects a PDCCH candidate to believe as final PDCCH in multiple PDCCH candidates Road.Terminal is not aware that base station in this multiple PDCCH candidate, and final choice is which PDCCH candidate (can also be referred to as It is candidate PDCCH) as final PDCCH channel.Therefore terminal needs to attempt PDCCH one by one in multiple PDCCH candidates Demodulation decoding, until can be successfully found PDCCH channel.

It is candidate for above-mentioned multiple PDCCH, it is typically distributed in multiple aggregation levels, each aggregation level generally comprises more A PDCCH is candidate.Aggregation level refers to control channel unit (the Control Channel that a PDCCH candidate includes Element, CCE) number.For example, each PDCCH candidate in the aggregation level is by 4 if aggregation level is 4 CCE composition.By taking NR (New RAT: new generation of wireless access technology) as an example, a CCE is by 6 resource element groups (Resource Element Group, REG) composition, each REG is made of 12 resource elements (Resource Element, RE), but this Shen It please be not limited to this.

As can be seen that PDCCH number of candidates is more, terminal needs the PDCCH number of candidates of blind Detecting more, therefore, needs Want the CCE number of channel estimation also more.

The above-mentioned basic concepts for PDCCH are described.In addition to this, it then introduces involved in some PDCCH The concept of the control resource collection (Control the Resource set, CORESET) and search space that arrive.Wherein, CORESET is There are the concept in concept in NR, search space in LTE and NR.

It is mainly used for determining the frequency domain model that base station sends PDCCH and terminal detection PDCCH about CORESET, CORESET It encloses and the number of symbols of PDCCH channel occupancy.CORESET may include following parameter:

A CORESET ID (control resource collection identifier)

Frequency-domain resources (frequency domain resource)

Time-duration (1,2, or 3) (time-domain symbol number)

About search space, search space is mainly used for determining that those aggregation levels, Yi Ji can be used in PDCCH channel PDCCH number of candidates and the information such as PDCCH period and time-domain position in specific aggregation level.Search space can wrap Containing following parameter:

A CORESET ID (control resource collection identifier)

DCI format parameter；(descending control information format)

Monitoring periodicity of slot (s) (monitoring cycle)

Monitoring offset of slot(s)((0,1,…,N-1)for monitoring periodicity Of N) (Physical Downlink Control Channel monitoring offset number of time slot)

Number of candidates for AL=1 (0,1,2,3,4,5,6,8) (believe by the physical down of aggregation level 1 Road number of candidates)

Number of candidates for AL=2 (0,1,2,3,4,5,6,8) (believe by the physical down of aggregation level 2 Road number of candidates)

Number of candidates for AL=4 (0,1,2,3,4,5,6,8) (believe by the physical down of aggregation level 4 Road number of candidates)

Number of candidates for AL=8 (0,1,2,3,4,5,6,8) (believe by the physical down of aggregation level 8 Road number of candidates)

Number of candidates for AL=16 (0,1,2,3,4,5,6,8) (physical down of aggregation level 16 Channel candidate number)

Normal structure is for third generation partner program (3rd Generation Partnership Project, 3GPP) The maximum number for being determined an interior CORESET of portions of bandwidth (Bandwidth part, BWP) is 3, maximum in a BWP Search space number is 10, and a search space corresponds to a CORESET.

According to described above, the period on different search spaces can be different, when multiple search spaces are located at it is same when When in gap, when especially these search spaces are located at different CORESET, total PDCCH number of candidates will be obvious on the time slot Increase, therefore the blind examination detecting number of PDCCH, and needs the number for carrying out channel estimation CCE that can also obviously increase.To respectively PDCCH number of candidates on a search space and/or the CCE number for needing to carry out channel estimation, may make to set beyond user It is an example for including two search spaces shown in Fig. 1 except the limit of power that standby (User equipment, UE) is supported, Rectangular block in figure indicates 1 time slot, wherein the CCE number overload for needing to carry out channel estimation is more than the threshold value of setting. The above problem can actually be attributed to total PDCCH number of candidates of base station configuration, the PDCCH candidate value beyond permission.

Another similar problem is, for giving the configuration of search space, Downlink Control Information (Downlink Control Information, DCI) multiple DCI can be arranged for the search space in format parameter (format parameter) format.However, for given aggregation level (AL), NR provides that the PDCCH number of candidates of DCI format 2-0 is up to 1 Or 2.Above-mentioned search space parameter may configure multiple DCI format, and the PDCCH for the unified setting of aggregation level L is waited It selects number to be greater than 2, such as is configured to 6.So, for DCI format 2-0, the PDCCH number of candidates that base station is configured is greater than The PDCCH number of candidates that its maximum is supported.Require consideration for how that the PDCCH number of candidates DCI format 2-0 is limited in 2 Within.

Summary of the invention

The embodiment of the invention provides a kind of determination methods of physical downlink control channel PDCCH, comprising:

Base station determines the PDCCH candidate that should retain in the PDCCH candidate configured；

The base station selects a PDCCH candidate to send downlink control as to terminal from the PDCCH candidate of reservation The PDCCH of information processed.

The embodiment of the invention also provides a kind of determination methods of physical downlink control channel PDCCH, comprising:

Downlink control is respectively configured to each downlink control channel format in search space, by high-level signaling in base station PDCCH number of candidates of the channel format in each aggregation level；

The base station from configured for the downlink control channel format PDCCH candidate in, select a PDCCH candidate as PDCCH sends the Downlink Control Information of the downlink control channel format to terminal.

Base station selects W CCE according to setting rule from a control resource collection CORESET；

The base station is to each aggregation level in each search space for belonging to the CORESET, in the model of the W CCE Enclose the running time-frequency resource position of the PDCCH candidate of interior determining configuration；

The base station selects a PDCCH candidate from the PDCCH candidate of configuration, sends downlink control letter as to terminal The PDCCH of breath.

The embodiment of the invention also provides a kind of determining devices of physical downlink control channel PDCCH, comprising:

PDCCH candidate's determining module, for determining the PDCCH candidate that should retain in the PDCCH candidate configured；

PDCCH selecting module, for selecting a PDCCH candidate as to terminal from the PDCCH of reservation candidate Send the PDCCH of Downlink Control Information.

Resource selection module, for selecting W CCE from a control resource collection CORESET according to setting rule；

PDCCH candidate's determining module, for each aggregation level in each search space for belonging to the CORESET, The running time-frequency resource position of the PDCCH candidate of configuration is determined in the range of the W CCE；

PDCCH selecting module is sent for selecting a PDCCH candidate from the PDCCH of configuration candidate as to terminal The PDCCH of Downlink Control Information.

The embodiment of the invention also provides a kind of base station, including memory, processor and it is stored on the memory simultaneously The computer program that can be run on the processor, the processor execute the processing of method as described above.

The embodiment of the invention also provides a kind of computer storage mediums, for saving computer program, the computer The processing of method as described above is realized when program is executed by processor.

Above-described embodiment scheme can be in such a way that PDCCH candidate abandons, to avoid the PDCCH on each search space Number of candidates and/or the CCE number for needing to carry out channel estimation exceed the limit of power of UE.

The embodiment of the invention provides a kind of detection methods of physical downlink control channel PDCCH, comprising:

Terminal determines the PDCCH candidate retained in the PDCCH candidate configured；

The terminal is attempted to receive what PDCCH channel was carried in the running time-frequency resource position of the PDCCH candidate of the reservation Downlink Control Information.

The embodiment of the invention also provides a kind of detection methods of physical downlink control channel PDCCH, comprising:

Terminal selects W CCE according to setting rule from a control resource collection CORESET；

The terminal is to each aggregation level in each search space for belonging to the CORESET, in the model of the W CCE Enclose the running time-frequency resource position of interior determination PDCCH candidate to be detected；

The terminal is attempted reception PDCCH channel and is carried in the running time-frequency resource position of the PDCCH candidate to be detected Downlink Control Information.

The embodiment of the invention also provides a kind of detection devices of physical downlink control channel PDCCH, comprising:

PDCCH candidate's determining module, for determining the PDCCH candidate retained in the PDCCH candidate configured；

PDCCH detection module is attempted to receive PDCCH letter for the running time-frequency resource position of the PDCCH candidate in reservation The Downlink Control Information that road is carried.

PDCCH candidate's determining module, for each aggregation level in each search space for belonging to the CORESET, The running time-frequency resource position of PDCCH candidate to be detected is determined in the range of the W CCE；

PDCCH detection module, for attempting to receive PDCCH in the running time-frequency resource position of the PDCCH candidate to be detected The Downlink Control Information that channel is carried.

The embodiment of the invention also provides a kind of terminal, including memory, processor and it is stored on the memory simultaneously The computer program that can be run on the processor, the processor execute the processing of method as described above.

In above-described embodiment, terminal is by the way of the discarding of PDCCH candidate, to determine that the PDCCH for needing to detect is waited Choosing avoids the PDCCH number of candidates detected on each search space and/or the CCE number for carrying out channel estimation beyond UE's Limit of power.

Detailed description of the invention

Fig. 1 provides CCE number that terminal needs to carry out channel estimation one beyond the limit of power supported and exemplary shows It is intended to；

Fig. 2 is the flow chart that one PDCCH of the embodiment of the present invention determines method；

Fig. 3 is the module map of one PDCCH determining device of the embodiment of the present invention；

Fig. 4 is the flow chart of one PDCCH detection method of the embodiment of the present invention；

Fig. 5 is the module map of one PDCCH detection device of the embodiment of the present invention；

Fig. 6 is the flow chart that two PDCCH of the embodiment of the present invention determines method；

Fig. 7 is the module map of two PDCCH determining device of the embodiment of the present invention；

Fig. 8 is the flow chart of two PDCCH detection method of the embodiment of the present invention；

Fig. 9 is the module map of two PDCCH detection device of the embodiment of the present invention；

Figure 10 A- Figure 14 B is the schematic diagram of the selection PDCCH candidate in example 1-6 of the present invention；

Figure 15 is the schematic diagram for the CCE that CORESET bandwidth includes in example seven of the present invention；

Figure 16 is the schematic diagram of the W CCE of selection in example seven of the present invention in CORESET.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application Feature can mutual any combination.

The application proposes relevant programme, needs to carry out channel estimation for solving PDCCH number of candidates and/or terminal CCE number exceeds the problem of UE limit of power.Wherein, terminal maximum be able to detect (blind Detecting) PDCCH number of candidates and into The CCE number of row channel estimation is provided with respective threshold value (also referred to as target gate), such as terminal at most detects 8 PDCCH is candidate, and most multipair 48 CCE carry out channel estimation.The resolving ideas that the application proposes is that base station is provided in given time-frequency Source set, according to the rule selection running time-frequency resource subclass of setting, base station is in the running time-frequency resource subclass, according to the another of setting One rule is that one or more PDCCH candidate selects running time-frequency resource, then therefrom selects 1 PDCCH Hou Yuan as transmission downlink control The PDCCH of information processed.Terminal is in the same manner from given running time-frequency resource Resource selection running time-frequency resource subclass, described In running time-frequency resource subclass, running time-frequency resource is selected for one or more PDCCH candidate, is then attempted one or more of On the corresponding running time-frequency resource position of PDCCH candidate, the Downlink Control Information for receiving PDCCH channel bearing is attempted.

Using PDCCH abandon operation a kind of mode in, given running time-frequency resource set such as can be a certain bandwidth or A certain CORESET, according to the running time-frequency resource subclass that selects of rule of setting can be for the PDCCH candidate of configuration it is selected Running time-frequency resource set, and base station is that one or more PDCCH candidate selects running time-frequency resource according to another rule of setting, be can be After abandoning part PDCCH candidate in the PDCCH candidate of configuration, the running time-frequency resource of the PDCCH candidate of reservation.Based on selection CCE set generates in the another way of PDCCH candidate, and base station is one or more PDCCH candidate according to another rule of setting The running time-frequency resource (portion of time frequency resources in running time-frequency resource subclass) of selection is determined for the running time-frequency resource of PDCCH candidate Position, PDCCH candidate no longer needs to abandon at this time, is used directly for determining PDCCH.

The application is described in detail with embodiment below.

Embodiment one

The settling mode that the present embodiment proposes is, if the number of the PDCCH candidate of configuration and/or the PDCCH of configuration are waited Selecting corresponding CCE number is more than that corresponding threshold value, then base station and terminal are candidate according to some PDCCH of identical rule discarding, So that the number and corresponding CCE number of remaining PDCCH candidate, are no more than corresponding threshold value i.e. without departing from UE ability model It encloses.

In addition, be 1 or 2 to the maximum number of the PDCCH candidate of DCI format 2-0 setting in relevant criterion, and to each Kind of DCI format format is using by the way of unified configure, thus the number for being likely to occur the PDCCH candidate of configuration is more than 2 Situation, the present embodiment are directed to a problem, select 1 or 2 PDCCH candidates as downlink using from the PDCCH of configuration candidate The PDCCH for controlling information format 2-0 is candidate, and the PDCCH for abandoning other configurations is candidate.It, can be according to by taking selection 2 as an example PDCCH candidate index select from front to back 2 PDCCH candidates perhaps 2 PDCCH candidates of equally spaced selection or according to when Gap indexes, at least one information in C-RNTI and SFI-RNTI, selects 2 PDCCH candidates according to certain rule.

The determination method of the physical downlink control channel PDCCH of the present embodiment is as shown in Figure 2, comprising:

Step 110, base station determines the PDCCH candidate that should retain in the PDCCH candidate configured；

Step 120, the base station selects a PDCCH candidate to send out as to terminal from the PDCCH candidate of reservation Send the PDCCH of Downlink Control Information.

In the present embodiment, the base station determines the PDCCH candidate that should retain in the PDCCH candidate configured, comprising: the base It stands and the discarding operation of PDCCH candidate is executed respectively to each aggregation level in each search space, the PDCCH candidate abandons operation packet It includes:

According to the number for the PDCCH candidate that the first regular determination should retain；

The PDCCH candidate for selecting respective number from the PDCCH candidate of configuration according to Second Rule, as what should be retained PDCCH candidate abandons the PDCCH candidate of remaining configuration.

In the present embodiment, the base station executes PDCCH candidate to each aggregation level in each search space respectively and abandons behaviour Make, comprising: according to the sequence of search space number from low to high, successively each polymer grade in each search space is executed respectively PDCCH candidate abandons operation.In relevant criterion, the number of public search space low (numbering small) and the proprietary search of UE is empty Between number it is high (i.e. number is big), the present embodiment numbers sequence from low to high according to search space, successively to each search space Interior each polymer grade executes PDCCH candidate respectively and abandons operation, it is ensured that important search space can preferably retain PDCCH Candidate can not be protected again for the aggregation level in subsequent searches space after avoiding the number of the PDCCH candidate retained from reaching respective threshold The case where staying PDCCH.

In the present embodiment, the base station executes PDCCH candidate to each aggregation level in each search space respectively and abandons behaviour Make, comprising: in a search space, according to the sequence of aggregation level from high in the end or sequence from low to high, to each poly- It closes rank and executes the discarding operation of PDCCH candidate respectively.

A kind of related way that PDCCH candidate abandons operation is: to the aggregation level L for belonging to a certain search space s, PDCCH abandons the PDCCH number of candidates retained after operation and is denoted as M'_s,L, the preoperative PDCCH number of candidates of PDCCH candidate discarding For M_s,LThen:

。

Wherein, α is a certain number less than 1, for example, α be terminal CCE channel estimation number threshold value with it is true according to configuration Fixed current time slots terminal needs to carry out the ratio between CCE number of channel estimation.Base station and terminal can be (such as one to a cycle Radio frames) in each time slot execute the processing that above-mentioned PDCCH determines method respectively, current time slots refer to currently performed PDCCH It determines the relevant time slot of method, time slot k can also be expressed as.

But above-mentioned calculating M'_s,LMode there are some problems: it is empty for each search for example, using downward floor operation Between s, all it is possible that candidate without available PDCCH on a certain aggregation level L on the s of the search space, i.e. M'_s,LIt is 0；Especially It is in some aggregation level that may result on important search space (such as public search space) without available PDCCH Number of candidates.For another example, after carrying out PDCCH discarding operation, total PDCCH number of candidates may be significantly less than terminal energy on time slot The threshold value for the CCE number enough supported, so as to cause the reduction of available PDCCH number of candidates.

In the present embodiment, the number of the PDCCH candidate that should retain according to the first regular determination, comprising: empty to search Between aggregation level L in s, if the number M of the PDCCH candidate of configuration_s,L> 0 and should retaining of being calculated PDCCH it is candidate Number M'_s,L=0, then enable M'_s,L=1.It is available can to guarantee that search space s at least remains 1 PDCCH candidate in this way.Institute State M'_s,L=0 can be formula aboveTo calculate.

In another embodiment, the number of the PDCCH candidate that should retain according to the first regular determination, comprising: pass through High-level signaling notice terminal is for calculating M'_s,LNumerical value n_s, M'_s,LIt is that aggregation level L in the s of search space should retain The number of PDCCH candidate；And by formulaCalculate M'_s,L, wherein for the search in current time slots Space s, α are equal to n_sDivided by the n of multiple search spaces other in current time slots_sThe quotient that the sum of value obtains,Expression takes downwards It is whole.The numerical value n that another embodiment is configured by high-level signaling_s, so that base station can according to need the PDCCH time to reservation The number of choosing is adjusted, such as at least retains the original of 1 PDCCH candidate based on each search space or important search space Then numerical value n is set_s, etc..Above-mentioned search space s indicates relevant 1 search space, and s is the number of search space, and Aggregation level L indicates 1 aggregation level in search space, and L is the number of aggregation level.

In another embodiment, the number of the PDCCH candidate that should retain according to the first regular determination, comprising: to searching Aggregation level L in the s of rope space, if the number M of the PDCCH candidate of configuration_s,L> 0, then the number for the PDCCH candidate that should retainWherein, α is the threshold value of terminal CCE channel estimation number and the current time slots end according to configuration determination End needs to carry out the ratio between CCE number of channel estimation,Expression rounds up.

In the present embodiment, the PDCCH marquis for selecting respective number from the PDCCH candidate of configuration according to Second Rule Choosing, as the PDCCH candidate that should retain, comprising:

To the aggregation level L in the s of search space, according to the sequence of PDCCH candidate index from low to high, or from high to low Sequentially or equally spaced mode, from the M of configuration_s,LM' is selected in a PDCCH candidate_s,LA PDCCH candidate that should retain, M'_s,L It is the number of the PDCCH candidate that should retain determined according to first rule, M_s,L> 0, M'_s,L>0。

When wherein, using mode at equal intervals, the base station can to the aggregation level L in the s of search space, everyIt is a PDCCH is candidate, from the M of configuration_i,jSelect a PDCCH candidate as the PDCCH that should retain in a PDCCH candidate, until selecting M'_sLUntil a PDCCH candidate, M'_sLIt is the number of the PDCCH candidate that should retain determined according to first rule, M_s,L> 0, M'_s,L> 0,It indicates to be rounded downwards.

It should be noted that reaching terminal support in the number of the PDCCH candidate of reservation when using embodiment of above The processing of the PDCCH candidate of reservation can be no longer determined after the threshold value of PDCCH candidate number, it will be remaining in configuration PDCCH is all abandoned.By the above-mentioned means, the number of the PDCCH candidate retained can be made to be no more than respective doors limit value, it can also So that search space, which is especially important search space (such as public search space), available PDCCH candidate, and retain PDCCH candidate will not differ excessive than respective doors limit value.

Number for the PDCCH candidate of configuration existing for DCI format 2-0 is more than what DCI format2-0 allowed The problem of maximum number of PDCCH candidate, the present embodiment propose following several settling modes:

Mode one

The descending control information format DCI format 2-0 for being L for aggregation level in the s of search space, according to PDCCH The sequence of candidate index from low to high, or sequence or equally spaced mode from high to low, from the M of configuration_s,LA PDCCH candidate Select M'_s,LA PDCCH that should retain is candidate, M'_s,LIt is the maximum number for the PDCCH candidate that DCI format 2-0 allows, M_s,L > 0, M'_s,L>0。

Mode two

The DCI format 2-0 for being L for aggregation level in the s of search space, first according to Cell Radio Network Temporary Identifier/Identity, Cell-RNTI At least one information in C-RNTI, time slot format indicating cell radio network temporary identifier SFI-RNTI and time slot index, meter Calculate the M of configuration_s,LThe first PDCCH candidate that should retain in a PDCCH candidate, then selected based on first PDCCH candidate Select other M'_s,L- 1 PDCCH that should retain is candidate, M'_s,LIt is the maximum number for the PDCCH candidate that DCI format 2-0 allows Mesh, M_s,L> 0, M'_s,L>0。

It is described that other M' are determined based on first PDCCH candidate in the present embodiment_s,L- 1 PDCCH that should retain is waited Choosing, comprising: since should retain the first PDCCH candidate, everyA PDCCH candidate, which selects one, to be retained PDCCH it is candidate, until selecting M' again_s,LUntil -1 PDCCH that should retain is candidate.

In another embodiment, can be solved in such a way that high-level signaling is respectively configured existing for DCI format2-0 Problem, specifically, another embodiment provide a kind of determination method of physical downlink control channel PDCCH, comprising: base station pair The downlink control channel format is respectively configured each by high-level signaling in each downlink control channel format in search space PDCCH number of candidates in aggregation level；The base station is from the PDCCH candidate configured for the downlink control channel format, choosing A PDCCH candidate selected as PDCCH send to terminal the Downlink Control Information of the downlink control channel format.Because being to be directed to Each downlink control channel format is respectively configured, so there is no the numbers of the PDCCH of configuration candidate to be greater than DCI format The problem of maximum number that 2-0 is supported.

The present embodiment additionally provides a kind of determining device of physical downlink control channel PDCCH, as shown in Figure 3, comprising:

PDCCH candidate determining module 10, for determining the PDCCH candidate that should retain in the PDCCH candidate configured；

PDCCH selecting module 20, for selecting a PDCCH candidate as to end from the PDCCH of reservation candidate End sends the PDCCH of Downlink Control Information.

When above-mentioned PDCCH candidate determining module determines the PDCCH candidate that should retain in the PDCCH candidate configured, and PDCCH selecting module selects a PDCCH candidate to send downlink control as to terminal from the PDCCH candidate of reservation , can be using the specific processing in the present embodiment method when the PDCCH of information, which is not described herein again.

The present embodiment additionally provides a kind of base station, including memory, processor and is stored on the memory and can be The computer program run on the processor, the processor execute the processing of the method as performed by the present embodiment base station.

Correspondingly, the present embodiment additionally provides a kind of detection method of physical downlink control channel PDCCH, as shown in figure 4, Include:

Step 210, terminal determines the PDCCH candidate retained in the PDCCH candidate configured；

Step 220, the terminal is attempted to receive PDCCH channel in the running time-frequency resource position of the PDCCH candidate of the reservation The Downlink Control Information carried.

Terminal determines the PDCCH candidate retained in the PDCCH candidate configured, in the PDCCH candidate that configuration is determined with base station The method of the PDCCH candidate of reservation is identical.

In the present embodiment,

The terminal determines the PDCCH candidate that should retain in the PDCCH candidate configured, comprising: the terminal is to each search Each aggregation level in space executes PDCCH candidate respectively and abandons operation, and the PDCCH candidate abandons operation and includes:

In the present embodiment,

The terminal executes PDCCH candidate to each aggregation level in each search space respectively and abandons operation, comprising: according to The sequence of search space number from low to high, successively executes PDCCH candidate to each polymer grade in each search space respectively and abandons Operation.

In the present embodiment,

The number for the PDCCH candidate that the terminal should retain according to the first regular determination, comprising:

To the aggregation level L in the s of search space, if the number M of the PDCCH candidate of configuration_s,L> 0 and what is be calculated answer The number M' of the PDCCH candidate of reservation_s,L=0, then enable M'_s,L=1；Or

Notify terminal for calculating M' by high-level signaling_s,LNumerical value n_s, M'_s,LIt is the aggregation level L in the s of search space The number for the PDCCH candidate that should retain；By formulaCalculate M'_s,L, wherein for searching in current time slots Rope space s, α are equal to n_sDivided by the n of multiple search spaces other in current time slots_sThe quotient that the sum of value obtains,Expression takes downwards It is whole；Or

To the aggregation level L in the s of search space, if the number M of the PDCCH candidate of configuration_s,L> 0, then it should retain The number of PDCCH candidateWherein, α is for the threshold value of terminal CCE channel estimation number and according to configuration Determining current time slots terminal needs to carry out the ratio between CCE number of channel estimation,Expression rounds up.

In the present embodiment,

The PDCCH candidate for selecting respective number from the PDCCH candidate of configuration according to Second Rule, as should retain PDCCH candidate, comprising:

To the aggregation level L in the s of search space, according to the sequence of PDCCH candidate index from low to high, or from high to low Sequentially, from the M of configuration_s,LM' is selected in a PDCCH candidate_s,LA PDCCH candidate that should retain；Or

To the aggregation level L in the s of search space, everyA PDCCH is candidate, from the M of configuration_i,jA PDCCH candidate It is middle to select a PDCCH candidate as the PDCCH that retain, until selecting M'_s,LUntil a PDCCH candidate；

Wherein, M'_s,LIt is the number of the PDCCH candidate that should retain determined according to first rule, M_s,L> 0, M'_s,L> 0,It indicates to be rounded downwards.

In the present embodiment,

The descending control information format DCI format 2-0 for being L for aggregation level in the s of search space, according to PDCCH The sequence of candidate index from low to high, or sequence or equally spaced mode from high to low, from the M of configuration_s,LA PDCCH candidate Select M'_s,LA PDCCH that should retain is candidate；Or

The DCI format 2-0 for being L for aggregation level in the s of search space, first according to Cell Radio Network Temporary Identifier/Identity, Cell-RNTI At least one information in C-RNTI, time slot format indicating cell radio network temporary identifier SFI-RNTI and time slot index, meter Calculate the M of configuration_s,LThe first PDCCH candidate that should retain in a PDCCH candidate, then selected based on first PDCCH candidate Select other M'_s,L- 1 PDCCH that should retain is candidate；

Wherein, M'_s,LIt is the maximum number for the PDCCH candidate that DCI format 2-0 allows, M_s,L> 0, M'_s,L>0。

In the present embodiment,

Other M' are determined based on first PDCCH candidate_s,L- 1 PDCCH that should retain is candidate, comprising: from described The first PDCCH candidate that should retain starts, everyA PDCCH candidate selects the PDCCH that should retain candidate, directly To selecting M' again_s,LUntil -1 PDCCH that should retain is candidate.

A kind of detection device of physical downlink control channel PDCCH is additionally provided in the present embodiment, as shown in Figure 5, comprising:

PDCCH candidate determining module 30, for determining the PDCCH candidate retained in the PDCCH candidate configured；

PDCCH detection module 40 is attempted to receive PDCCH for the running time-frequency resource position of the PDCCH candidate in reservation The Downlink Control Information that channel is carried.

The present embodiment additionally provides a kind of terminal, including memory, processor and is stored on the memory and can be The computer program run on the processor, the processor execute the processing of the method as performed by the present embodiment terminal.

Embodiment two

In the present embodiment, in a CORESET, according to certain rule selection fixed number CCE (such as 48, be no more than The CCE number ability that UE is supported)；Base station and terminal determine the running time-frequency resource position of PDCCH candidate according to certain rule, that is, The position of the candidate corresponding CCE of PDCCH and quantity.Because PDCCH candidate to be limited in fixed (such as within 48 CCE), because This terminal carries out the available satisfaction of threshold value of the CCE quantity of channel estimation.

As shown in fig. 6, a kind of determination method of physical downlink control channel PDCCH provided in this embodiment, comprising:

Step 310, base station selects W CCE according to setting rule from a control resource collection CORESET；

The threshold value for the CCE quantity that W can carry out channel estimation according to terminal determines.

Step 320, the base station is to each aggregation level in each search space for belonging to the CORESET, at the W The running time-frequency resource position of the PDCCH candidate of configuration is determined in the range of CCE；

Step 330, the base station selects a PDCCH candidate from the PDCCH candidate of configuration, sends down as to terminal The PDCCH of row control information.

In the present embodiment,

The base station selects W CCE according to setting rule from a control resource collection CORESET, comprising:

According to W CCE of the sequential selection of CCE index from low to high；Or

According to W CCE of the sequential selection of CCE index from high to low；Or

At interval ofA CCE selects a CCE, until selecting W CCE, N_CCE,pIt is to form the CORESET The number of CCE,It indicates to be rounded downwards.

In the present embodiment,

The base station determines the running time-frequency resource position of the PDCCH candidate of configuration in the range of the W CCE, comprising: right Aggregation level L in the s of search space determines the running time-frequency resource position of the PDCCH candidate of configuration in the following manner:

In the range of the W CCE, M is determined according to the sequence of CCE index from low to high_s,LA PDCCH it is candidate when Frequency resource location；Or

In the range of the W CCE, M is determined according to the sequence of CCE index from high to low_s,LA PDCCH it is candidate when Frequency resource location；Or

In the range of the W CCE, M is determined in a manner of equally spaced_s,LThe running time-frequency resource position of a PDCCH candidate；

Wherein, M_s,LIt is the PDCCH number of candidates for the aggregation level L configuration that base station is in the s of search space.

The present embodiment additionally provides a kind of determining device of the physical downlink control channel PDCCH of base station side, such as Fig. 7 institute Show, comprising:

Resource selection module 50, for selecting W CCE from a control resource collection CORESET according to setting rule, The threshold value for the CCE quantity that W can carry out channel estimation according to terminal determines；

PDCCH candidate determining module 60, for each aggregation level in each search space for belonging to the CORESET, The running time-frequency resource position of the PDCCH candidate of configuration is determined in the range of the W CCE；

PDCCH selecting module 70 is sent out for selecting a PDCCH candidate from the PDCCH of configuration candidate as to terminal Send the PDCCH of Downlink Control Information.

The specific implementation for the processing that above-mentioned modules execute is shown in the description in the present embodiment method, no longer superfluous here It states.

Correspondingly, the present embodiment also provides a kind of detection method of physical downlink control channel PDCCH, as shown in figure 8, packet It includes:

Step 410, terminal selects W CCE according to setting rule from a control resource collection CORESET；

The threshold value for the CCE quantity that W can carry out channel estimation according to terminal determines；

Step 420, the terminal is to each aggregation level in each search space for belonging to the CORESET, at the W The running time-frequency resource position of PDCCH candidate to be detected is determined in the range of CCE；

Step 430, the terminal is attempted to receive PDCCH letter in the running time-frequency resource position of the PDCCH candidate to be detected The Downlink Control Information that road is carried.

In the present embodiment,

The terminal selects W CCE according to setting rule from a control resource collection CORESET, comprising:

In the present embodiment,

The terminal determines the running time-frequency resource position of the PDCCH candidate of configuration in the range of the W CCE, comprising: right Aggregation level L in the s of search space determines the running time-frequency resource position of the PDCCH candidate of configuration in the following manner:

The present embodiment additionally provides a kind of detection device of physical downlink control channel PDCCH of terminal side, such as Fig. 9 institute Show, comprising:

Resource selection module 80, for selecting W CCE from a control resource collection CORESET according to setting rule, The threshold value for the CCE quantity that W can carry out channel estimation according to terminal determines；

PDCCH candidate determining module 90, for each aggregation level in each search space for belonging to the CORESET, The running time-frequency resource position of PDCCH candidate to be detected is determined in the range of the W CCE；

PDCCH detection module 100, for attempting to receive in the running time-frequency resource position of the PDCCH candidate to be detected The Downlink Control Information that PDCCH channel is carried.

Example one

This example sets 1 rule according to search space ID sequence+rounding downwards for 0, carries out PDCCH candidate discarding behaviour Make.

In this example, for being used for scheduling carrier wave n_CIPDCCH, for the aggregation level L in the s of search space, PDCCH loses It abandons the PDCCH number of candidates retained after operation and is denoted as M'_s,L, PDCCH abandons preoperative PDCCH number of candidates and is denoted as M'_s,L。

Base station side

Base station numbers sequence from low to high according to search space, successively executes PDCCH candidate and abandons operation；For same Different aggregation levels in search space then sequentially execute PDCCH candidate according to aggregation level from high to low and abandon operation；

For each aggregation level L in each search space s, PDCCH is executed in the following way and abandons operation:

For M_s,L> 0, PDCCH abandon the PDCCH number of candidates M' retained after operation_s,LIt calculates as follows:If the M' of above-mentioned calculating_s,L=0, then enable M'_s,L=1.

The PDCCH number of candidates M' retained after operation is abandoned calculating PDCCH_s,LAfterwards, for the polymerization on the s of search space Rank L, from M_s,LM' is selected in a PDCCH candidate_s,LPDCCH is candidate.Base station is obtaining above-mentioned M'_s,LAfter a PDCCH is candidate, from M'_s,LSelect a PDCCH candidate as actual PDCCH channel in a PDCCH candidate.

For M'_s,LThe selection of PDCCH candidate, base station is from M_s,LIn a PDCCH candidate, according to PDCCH candidate index by low To high sequential selection M'_s,LA PDCCH is candidate.Such as aggregation level L, M a certain in the s of search space_s,L=8, M '_s,L=4 When, the M before executing PDCCH candidate selection_s,LA PDCCH position candidate is as shown in Figure 10 A.It executes PDCCH candidate and selects it M' afterwards_s,LA PDCCH position candidate is as shown in Figure 10 B.Or

For M '_i,jThe selection of PDCCH candidate, base station is from M_s,LIn a PDCCH candidate, according to PDCCH candidate index by height To low sequential selection M'_s,LA PDCCH is candidate；Such as aggregation level L, M a certain in the s of search space_s,L=8, M '_s,L=4 When, the M before executing PDCCH candidate selection_s,LA PDCCH position candidate is as shown in Figure 11 A.It executes PDCCH candidate and selects it M' afterwards_s,LA PDCCH position candidate is as shown in Figure 11 B.Or

For M'_s,LThe selection of PDCCH candidate, everyA PDCCH candidate selects a PDCCH candidate as guarantor The PDCCH stayed is candidate, until selecting M'_s,LUntil the PDCCH of reservation is candidate.Such as a certain aggregation level in the s of search space L, M_s,L=8, M '_s,LM when=4, before executing PDCCH candidate selection_s,LA PDCCH position candidate is as illustrated in fig. 12.It holds M' after row PDCCH candidate selection_s,LA PDCCH position candidate is as shown in Figure 12 B.

For using the transmission of the PDCCH of aggregation level L, base station is from the above-mentioned M' obtained_s,LIn a PDCCH candidate, selection One PDCCH position candidate is carried on the letter by the PDCCH channel, to terminal transmission as final PDCCH channel, base station Downlink Control Information on road.

Terminal side

In the present embodiment, the operating feature of terminal side is as follows: according to the sequence of search space number from low to high, executing PDCCH candidate abandons operation；For the different aggregation levels in same search space, sequentially held from high to low according to aggregation level Row PDCCH candidate abandons operation.

For each aggregation level L in each search space s, PDCCH is executed according to the methods below and abandons operation；It is right In M_s,L> 0, PDCCH abandon the PDCCH number of candidates M' retained after operation_s,LIt calculates as follows:On if State the M' of calculating_s,L=0, then enable M'_s,L=1；

The PDCCH number of candidates M' retained after operation is abandoned calculating PDCCH_s,LAfterwards, for the polymerization on the s of search space Rank L, from M_s,LM' is selected in a PDCCH candidate_s,LPDCCH is candidate.Base station is obtaining above-mentioned M'_s,LAfter a PDCCH is candidate, In this M'_s,LSelect a PDCCH candidate as actual PDCCH channel in a PDCCH candidate.For M'_s,LPDCCH candidate's Selection, the selection mode that terminal uses are not repeated herein as base station.

Terminal carries out PDCCH blind Detecting in multiple aggregation levels, for using the PDCCH blind Detecting of aggregation level L, eventually It attempts to above-mentioned M' at end_s,LA PDCCH position candidate attempts the detection of PDCCH.If terminal can be in some aggregation level Some PDCCH position candidate can successfully detect PDCCH, then terminal uses Downlink Control Information entrained by the PDCCH channel, To go to receive the information that corresponding PDSCH channel is carried according to the instruction of the DCI.

Example two

This example carries out PDCCH candidate by the way of being sorted+being rounded up by search space ID and abandons operation.

Base station side

In this example, the operation of base station side and example one the difference is that: for each of each search space s Aggregation level L executes PDCCH according to the methods below and abandons operation；

For M_s,L> 0, PDCCH abandon the PDCCH number of candidates M' retained after operation_s,LIt calculates as follows:Wherein, α is the threshold value of terminal CCE channel estimation number and the current time slots end according to configuration determination End needs to carry out the ratio between CCE number of channel estimation,Expression rounds up.

The PDCCH number of candidates M' retained after operation is abandoned calculating PDCCH_s,LAfterwards, for the polymerization on the s of search space Rank L, from M_s,LM' is selected in a PDCCH candidate_s,LA PDCCH is candidate.Base station is obtaining above-mentioned M'_s,LA PDCCH is candidate Afterwards, in this M'_s,LSelect a PDCCH candidate as actual PDCCH channel in a PDCCH candidate.

For M'_s,LThe selection of a PDCCH candidate, base station is from M_s,LIn a PDCCH candidate, according to PDCCH candidate index by Low to high sequential selection M'_s,LA PDCCH is candidate；

Alternatively, for M'_s,LThe selection of a PDCCH candidate, base station is from M_s,LIn a PDCCH candidate, according to PDCCH candidate's rope Draw sequential selection M' from high to low_s,LA PDCCH is candidate；

Alternatively, for M'_i,jThe selection of a PDCCH candidate, everyA PDCCH candidate selects a PDCCH candidate PDCCH as reservation is candidate, until selecting M'_s,LUntil the PDCCH of reservation is candidate.

Terminal side

In the present embodiment, the operating feature of terminal side is as follows: according to the sequence of search space number from low to high, executing PDCCH candidate abandons operation；For the different aggregation levels in same search space, sequentially held from high to low according to aggregation level Row PDCCH candidate abandons operation；For each aggregation level L in each search space s, held according to mode identical with base station Row PDCCH abandons operation, abandons the PDCCH number of candidates M' retained after operation calculating PDCCH_s,LAfterwards, for search space s On aggregation level L, from M_s,LM' is selected in a PDCCH candidate_s,LPDCCH is candidate.Terminal is for M'_s,LThe selection of PDCCH candidate Mode is identical as base station.

Example three

This example carries out PDCCH candidate's discarding in such a way that ID sequence+RRC notice numerical value n in search space is calculated for α Operation.

Base station side

In this example, the operating feature of base station side is as follows: base station numbers sequence from low to high according to search space, executes PDCCH candidate abandons operation；For the different aggregation levels in same search space, sequentially held from high to low according to aggregation level Row PDCCH candidate abandons operation；For each aggregation level L in each search space s, execute according to the methods below PDCCH abandons operation；For M_i,j> 0, PDCCH abandon the PDCCH number of candidates M' retained after operation_s,LIt calculates as follows:

In this example, for scheduling carrier wave n_CIPDCCH, search space s, aggregation level L configuration PDCCH number of candidates For M_s,L, execute PDCCH candidate and abandon operation M'_s,L。

Base station is denoted as n for calculating the numerical value of α for search space s by high-level signaling notice_s.Base station is each to search Rope space s configures a n_sValue.Base station is according to the n of search space s_sValue, determines search space s on time slot k, the α of aggregation level L Value, such as:

α=search space s n_sThe n of all search spaces on value/time slot k_sThe sum of value.

For M'_s,LThe selection of a PDCCH candidate, base station is from M_s,LIn a PDCCH candidate, according to PDCCH candidate index by Low to high sequential selection M'_s,LA PDCCH is candidate；Alternatively, for M'_s,LThe selection of PDCCH candidate, base station is from M_s,LA PDCCH In candidate, according to the sequential selection M' of PDCCH candidate index from high to low_s,LA PDCCH is candidate；Alternatively, for M'_s,LIt is a The selection of PDCCH candidate, everyA PDCCH candidate selects a PDCCH candidate candidate as the PDCCH retained, directly To selecting M'_s,LUntil the PDCCH of a reservation is candidate.

Terminal side

In the present embodiment, the operating feature of terminal side is as follows: terminal numbers sequence from low to high according to search space, holds Row PDCCH candidate abandons operation；For the different aggregation levels in same search space, according to aggregation level sequence from high to low It executes PDCCH candidate and abandons operation；For each aggregation level L in each search space s, execute according to the methods below PDCCH abandons operation: for M_s,L> 0, PDCCH abandon the PDCCH number of candidates M' retained after operation_s,LIt calculates as follows:

In this example, for scheduling carrier wave n_CIPDCCH, search space s, aggregation level L configuration PDCCH number of candidates For M_s,L, executing PDCCH candidate and abandoning the PDCCH number of candidates after operation is M'_s,L。

Terminal is each search space s configuration for calculating the numerical value n of α by high-level signaling according to base station_s., determine The α value of search space s on time slot k, aggregation level L, such as:

The PDCCH number of candidates M' retained after operation is abandoned calculating PDCCH_s,LAfterwards, for the polymerization on the s of search space Rank L, from M_s,LM' is selected in a PDCCH candidate_s,LPDCCH is candidate.Terminal is obtaining above-mentioned M'_s,LAfter a PDCCH is candidate, This M'_s,LSelect a PDCCH candidate as actual PDCCH channel in a PDCCH candidate.For M'_s,LThe choosing of PDCCH candidate It selects, terminal uses mode identical with base station.

Example four

The principle of this example DCI format 2-0PDCCH candidate selection is: PDCCH candidate index from low to high suitable Sequence.

The DCI format 2-0 for being L for aggregation level in the s of search space, base station polymer grade from for search space s Not Wei L configuration M_s,LIn a position candidate, according to PDCCH candidate index from low to high sequence, select M'_s,LA PDCCH is candidate； Wherein, M'_s,LThe DCI format2-0 for being L for aggregation level in the s of search space is protected after executing PDCCH selection/discarding operation The PDCCH number of candidates stayed.

Base station side

It in this example, for descending control information format 2-0, is configured in the s of search space, and base station is that search is empty Between the PDCCH number of candidates of aggregation level L configuration in s be M_s,L, for and for descending control information format 2-0, PDCCH number of candidates M'_s,LIt is fixed as 2.In this example, base station needs the M configured from base station_s,LIn a PDCCH candidate, selection M'_s,LA PDCCH is candidate.

In this example, base station generates M according to certain rule_s,LA PDCCH position candidate；For poly- on the s of search space The downlink control format 2-0 of rank L is closed, base station is from this M_s,LIn a PDCCH candidate from low to high according to PDCCH candidate index Sequential selection M'_s,LA PDCCH is candidate.

For example, for M_s,L=8, M'_s,L=2, for the DCI format 2-0 in the s of search space, for a certain polymerization Rank L, the M before executing PDCCH candidate selection_s,LA PDCCH position candidate is as shown in FIG. 13A.Execute PDCCH candidate choosing M' after selecting_s,LA PDCCH position candidate is as shown in Figure 13 B.

For using the descending control information format base station 2-0, P of aggregation level L from the above-mentioned M' obtained_s,LA PDCCH is waited It chooses, selects a PDCCH position candidate as final PDCCH channel, base station is sent by the PDCCH channel to terminal Format is the Downlink Control Information of 2-0.

Terminal side

It in this example, for descending control information format 2-0, is configured in the s of search space, and base station is that search is empty Between the PDCCH number of candidates of aggregation level L configuration in s be M_s,L, for and for descending control information format 2-0, PDCCH number of candidates M'_s,LIt is fixed as 2.In this example, terminal needs the M configured from base station_s,LIn a PDCCH candidate, selection M'_s,LA PDCCH is candidate.

In this example, terminal generates M according to certain rule_s,LA PDCCH position candidate；For poly- on the s of search space The downlink control format 2-0 of rank L is closed, terminal is from this M_s,LIn a PDCCH candidate from low to high according to PDCCH candidate index Sequential selection M'_s,LA PDCCH is candidate.

Terminal carries out PDCCH blind Detecting in multiple aggregation levels, for using the PDCCH blind Detecting of aggregation level L, eventually Attempt the detection of PDCCH in end.If terminal can some PDCCH position candidate in some aggregation level can successfully detect PDCCH, then terminal obtains Downlink Control Information entrained by the PDCCH channel.

Example five

The selection principle of this example DCI format 2-0PDCCH candidate is: being waited by the selection such as time slot index PDCCH Choosing.

The DCI format 2-0 for being L for aggregation level in the s of search space, base station polymer grade from for search space s Not Wei L configuration M_s,LIn position candidate, according to PDCCH candidate index from low to high sequence, select M'_s,LA PDCCH is candidate；Its In, M'_s,LThe DCI format2-0 for being L for aggregation level in the s of search space retains after executing PDCCH selection/discarding operation The PDCCH number of candidates got off.

Base station side

In this example, base station generates M according to certain rule_s,LA PDCCH position candidate；For poly- on the s of search space The downlink control format 2-0 of rank L is closed, base station is from this M_s,LBelieved in a PDCCH candidate according at least one of following information Breath calculates selected first PDCCH position candidate after executing PDCCH candidate selection according to certain computation rule:

Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell Radio Network Temporary Identifier, C-RNTI)；

Time slot format indicating cell radio network temporary identifier (Slot format indication Radio Network Temporary Identifier, SFI-RNTI)；

Time slot index；

For example, first PDCCH candidate is in M_s,LIndex in a PDCCH candidate is mod (C-RNTI, M_s,L).It is calculating After first PDCCH candidate index, base station is since the PDCCH candidate index, according to PDCCH candidate index from low to high suitable The interval of sequence and setting continues to select other PDCCH candidate indexes, if choose highest PDCCH candidate index still without Select enough M'_s,LA PDCCH is candidate, then continues to continue to select PDCCH candidate from the PDCCH candidate index of lowest number, and PDCCH candidate index selecting sequence is from low to high, until selecting enough M'_s,LUntil a PDCCH is candidate.For example, for M_s,L=8, M'_s,L=2, the DCI format 2-0 in the s of search space selects a certain aggregation level L from PDCCH candidate is executed M before_s,LA PDCCH position candidate is as shown in Figure 14 A.Execute the M' after PDCCH candidate selection_s,LA PDCCH candidate bit It sets as shown in Figure 14B.

For using the descending control information format 2-0 of aggregation level L, base station is from the above-mentioned M' obtained_s,LA PDCCH is waited It chooses, selects a PDCCH position candidate as final PDCCH channel, base station is sent by the PDCCH channel to terminal Format is the Downlink Control Information of 2-0.

Terminal side

In this example, terminal generates M according to rule identical with base station_s,LA PDCCH position candidate, namely determine M_s,LIt is a The running time-frequency resource position of PDCCH candidate.For example, first PDCCH candidate is in M_s,LIndex in a PDCCH candidate is mod (C- RNTI,M_s,L).After calculating first PDCCH candidate index, terminal is since the PDCCH candidate index, according to PDCCH candidate Sequence from low to high and the interval of setting are indexed, continues to select other PDCCH candidate indexes, if chosen highest PDCCH candidate index is still without the enough M' of choosing_s,LA PDCCH is candidate, then continues to continue to select from the PDCCH candidate index of lowest number PDCCH candidate is selected, and PDCCH candidate index selecting sequence is from low to high, until selecting enough M'_s,LUntil a PDCCH is candidate.

Terminal carries out PDCCH blind Detecting in multiple aggregation levels, for using the PDCCH blind Detecting of aggregation level L, eventually Attempt the detection of PDCCH in end.If terminal can some PDCCH position candidate in some aggregation level successfully detect PDCCH, then terminal obtains Downlink Control Information entrained by the PDCCH channel.

Example six

This example DCI format 2-0PDCCH candidate's selection principle is: for the DCI-format 2-0 in index space PDCCH number of candidates is separately configured.

Base station side

In Downlink Control Information (Downlink Control Information, DCI) format 2-0 in NR, Mei Geju The maximum PDCCH number of candidates that closing allows in rank is 2.Configuration for search space, a search space can configure more A descending control information format, however only a PDCCH number of candidates is configured for each aggregation level.In order to look after downlink control Other descending control information formats except information format 2-0, base station may be poly- on the corresponding search space s of format 2-0 The PDCCH number of candidates that rank L configuration is significantly greater than 2 is closed, however descending control information format 2-0 is in each aggregation level PDCCH number of candidates is no more than 2.To, it may appear that the PDCCH number of candidates of base station configuration is greater than Downlink Control Information lattice This problem of the PDCCH number of candidates of formula 2-0 support.

In order to solve this problem, in this example, for each aggregation level in same search space s, base station passes through high level Signaling is that each descending control information format in the s of the search space configures a PDCCH number of candidates, for example, base station is to search The PDCCH number of candidates of each aggregation level L configuration in the s of rope space is M_s,L, and M_s,LNo more than 2.

For using the descending control information format 2-0 of aggregation level L, base station is from the above-mentioned M obtained_s,LA PDCCH is candidate In, select a PDCCH position candidate as final PDCCH channel, base station sends lattice by the PDCCH channel, to terminal Formula is the Downlink Control Information of 2-0.

Example seven

The running time-frequency resource of this exemplary PDCCH candidate is located in W CCE in CORESET.

Base station side

In this example, for being used for scheduling carrier wave n_CIPDCCH, base station be search space s in aggregation level L configuration PDCCH number of candidates is M_s,L, in this example, base station selects W CCE, W is according to terminal progress channel from a CORESET The threshold value of the CCE quantity of estimation determines；According to fixed rule selection M within the scope of this W CCE_s,LA PDCCH candidate makees It is candidate for the final PDCCH of the aggregation level L in the s of search space.Base station is in this M_s,LOne is selected in a PDCCH candidate PDCCH candidate is as final PDCCH channel.

In this example, the CORESET bandwidth that a number of base station configuration is p is as shown in figure 15, in Figure 15, The frequency domain bandwidth of CORESET p is N_CCE,p=96 CCE.For being used for scheduling carrier wave n_CIPDCCH, base station be search space s In aggregation level L configuration PDCCH number of candidates be M_s,L, base station determines this M_s,LThe specific implementation of a PDCCH position candidate Mode is as described below.

For belonging to any search space s of the CORESET, any aggregation level L, base station is according to certain rules at this In the range of W CCE, M is generated_s,LA PDCCH is candidate (namely to determine M_s,LThe running time-frequency resource position of a PDCCH candidate)；

The W CCE of selection of base station according to one of following rules in CORESET, W=48 in this example:

In CORESET, according to W CCE of the sequential selection of CCE index from low to high；

In CORESET, according to W CCE of the sequential selection of CCE index from high to low；

In CORESET, in the CORESET being made of Z CCE, according at equal intervalsA CCE A CCE is selected, until selecting W=48 CCE；

When according to W CCE is selected at equal intervals, the schematic diagram of base station selected CCE candidate is as shown in figure 16.

Behind the position base station selected W CCE, all search spaces corresponding for the CORESET, all aggregation levels PDCCH it is candidate, it is candidate that PDCCH will be generated within the scope of this W=48 CCE.

In this example, scheduling for a certain carrier wave, base station is that the PDCCH of the aggregation level L configuration in the s of search space is waited Selecting number is M_s,L, terminal is in above-mentioned W=48 CCE according to one of following rules identical with base station selection M_s,LA PDCCH It is candidate；

Within the scope of W CCE, according to the sequential selection M of CCE index from low to high_s,LA PDCCH is candidate, such as poly- Close rank L=4, M_s,LThe candidate corresponding position CCE first PDCCH in a PDCCH candidate is that the CCE index in Figure 16 is 0,2,4,6, the CCE index of second PDCCH candidate is 8,10,12,14, and so on.

Within the scope of W CCE, according to the sequential selection M of CCE index from high to low_s,LA PDCCH is candidate, such as poly- Close rank L=4, M_s,LThe candidate corresponding position CCE the last one PDCCH in a PDCCH candidate is the CCE index in Figure 16 It is 88,90,92,94, the candidate corresponding position CCE penultimate PDCCH is that the CCE index in Figure 16 is 8,0,82,84, 86, and so on.

In this example, scheduling for a certain carrier wave, base station is that the PDCCH of the aggregation level L configuration in the s of search space is waited Selecting number is M_s,L, terminal selects M in above-mentioned W=48 CCE_s,LPDCCH candidate method, in addition to above two method, Following methods can also be used:

For carrier wave n_CIScheduling, for relating to the search space s of search space p described above, aggregation level is L's TheNumber of a PDCCH candidate within the scope of above-mentioned W=48 CCE are as follows:

Wherein,Alternatively,Yp,-₁=nRNTI ≠ 0, A₀=39827, A₁= 39829,A₂=39839, and D=65537；

In above formula, For corresponding carrier wave n_CIThe search space s of scheduling In the corresponding PDCCH number of candidates of aggregation level L.It is all carrier wavesIn maximum value.n_RNTIRNTI is nothing Line network identification mark, for example, cell-radio network temporary identifier, system information radio network temporary identifier, time slot format Indicate radio network temporary identifier, pager wireless net network temporary identifier etc..

Base station determines the M in 48 CCE according to above-mentioned rule_s,LAfter a PDCCH position candidate, base station is in this M_s,LIt is a Select a PDCCH candidate as final PDCCH channel in PDCCH candidate.It is sent out by the PDCCH channel to terminal base station Send Downlink Control Information.

Terminal side

In this example, for being used for scheduling carrier wave n_CIPDCCH, base station be search space s in aggregation level L configuration PDCCH number of candidates is M_s,L, terminal is from a CORESET, W CCE of selection, however according to solid within the scope of this W CCE Fixed rule selection M_s,LA PDCCH candidate is candidate as the final PDCCH of the aggregation level L in the s of search space.

In this example, the CORESET bandwidth that a number of base station configuration is p is as shown in figure 15, in Figure 15, The frequency domain bandwidth of CORESET p is N_CCE,p=96 CCE.For being used for scheduling carrier wave n_CIPDCCH, base station be search space s In aggregation level L configuration PDCCH number of candidates be M_s,L, terminal determines this M_s,LThe concrete mode of a PDCCH position candidate It is identical as base station.

For belonging to any search space s of the CORESET, any aggregation level L, terminal is according to certain rules at this In the range of W CCE, M is generated_s,LA PDCCH is candidate；

The W CCE of selection of terminal according to one of following rules in CORESET, W=48 in this example.

In CORESET, in the CORESET being made of Z CCE, according at equal intervals

A CCE selects a CCE, until selecting W=48 CCE；

After terminal selects the W position CCE, all search spaces corresponding for the CORESET, all aggregation levels PDCCH it is candidate, it is candidate that PDCCH will be generated within the scope of this W=48 CCE.

In this example, scheduling for a certain carrier wave, base station is that the PDCCH of the aggregation level L configuration in the s of search space is waited Selecting number is M_s,L, terminal is in above-mentioned W=48 CCE according to one of following rules selection M_s,LPDCCH it is candidate；

Wherein,Alternatively,Y_{P, -1}=n_RNTI≠ 0, A₀=39827, A₁= 39829,A₂=39839, and D=65537；

Terminal carries out PDCCH blind Detecting in multiple aggregation levels, for using the PDCCH blind Detecting of aggregation level L, eventually It attempts to above-mentioned M at end_s,LA PDCCH position candidate attempts the detection of PDCCH.If terminal can be in some aggregation level Some PDCCH position candidate can successfully detect PDCCH, then terminal uses Downlink Control Information entrained by the PDCCH channel, To go to receive the information that corresponding PDSCH channel is carried according to the instruction of the DCI.

The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.Pass through above embodiment party The description of formula, it is required general that those skilled in the art can be understood that above-described embodiment method can add by software The mode of hardware platform is realized, naturally it is also possible to which by hardware, but in many cases, the former is more preferably embodiment.It is based on Such understanding, substantially the part that contributes to existing technology can be with soft in other words for the technical solution of the embodiment of the present invention The form of part product embodies, which is stored in a storage medium (such as ROM/RAM, magnetic disk, CD) In, including some instructions use is so that a terminal device (can be mobile phone, computer, server or the network equipment etc.) Execute method described in each embodiment of the present invention.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims

1. a kind of determination method of physical downlink control channel PDCCH, comprising:

The base station selects a PDCCH candidate to send downlink control letter as to terminal from the PDCCH candidate of reservation The PDCCH of breath.

2. the method as described in claim 1, it is characterised in that:

The base station determines the PDCCH candidate that should retain in the PDCCH candidate configured, comprising: the base station is to each search space Interior each aggregation level executes PDCCH candidate respectively and abandons operation, and the PDCCH candidate abandons operation and includes:

The PDCCH candidate for selecting respective number from the PDCCH candidate of configuration according to Second Rule, as the PDCCH that should retain Candidate abandons the PDCCH candidate of remaining configuration.

3. method according to claim 2, it is characterised in that:

The base station executes PDCCH candidate to each aggregation level in each search space respectively and abandons operation, comprising: according to search The sequence of space number from low to high, successively executes PDCCH candidate to each polymer grade in each search space respectively and abandons operation.

4. method as claimed in claim 2 or claim 3, it is characterised in that:

The base station executes PDCCH candidate to each aggregation level in each search space respectively and abandons operation, comprising: searches at one In rope space, according to the sequence of aggregation level from high in the end or sequence from low to high, each aggregation level is executed respectively PDCCH candidate abandons operation.

5. method according to claim 2, it is characterised in that:

The number of the PDCCH candidate that should retain according to the first regular determination, comprising:

To the aggregation level L in the s of search space, if the number M of the PDCCH candidate of configuration_s,L> 0 and what is be calculated should retain PDCCH candidate number M'_s,L=0, then enable M'_s,L=1.

6. method according to claim 2, it is characterised in that:

Notify terminal for calculating M' by high-level signaling_s,LNumerical value n_s, M'_s,LIt is that aggregation level L in the s of search space should be protected The number of the PDCCH candidate stayed；

By formulaCalculate M'_s,L, wherein n is equal to for the search space s in current time slots, α_sDivided by The n of other multiple search spaces in current time slots_sThe quotient that the sum of value obtains,It indicates to be rounded downwards.

7. method according to claim 2, it is characterised in that:

To the aggregation level L in the s of search space, if the number M of the PDCCH candidate of configuration_s,L> 0, then the PDCCH that should retain is waited The number of choosingWherein, α is that the threshold value of terminal CCE channel estimation number is worked as with according to configuration is determining Preceding time slot terminal needs to carry out the ratio between CCE number of channel estimation,Expression rounds up.

8. method according to claim 2, it is characterised in that:

The PDCCH candidate for selecting respective number from the PDCCH candidate of configuration according to Second Rule, as what should be retained PDCCH candidate, comprising:

It is suitable according to the sequence of PDCCH candidate index from low to high, or from high to low to the aggregation level L in the s of search space Sequence or equally spaced mode, from the M of configuration_s,LM' is selected in a PDCCH candidate_s,LA PDCCH candidate that should retain, M'_s,LIt is According to the number for the PDCCH candidate that should retain that first rule determines, M_s,L> 0, M'_s,L>0。

9. method according to claim 2, it is characterised in that:

The base station selects the PDCCH candidate of respective number according to Second Rule from the PDCCH candidate of configuration, as should retain PDCCH candidate, comprising:

To the aggregation level L in the s of search space, everyA PDCCH is candidate, from the M of configuration_s,LIt is selected in a PDCCH candidate It is candidate as the PDCCH that should retain to select a PDCCH, until selecting M'_s,LUntil a PDCCH candidate, M'_s,LIt is according to described The number for the PDCCH candidate that should retain that one rule determines, M_s,L> 0, M'_s,L> 0,It indicates to be rounded downwards.

10. method according to claim 2, it is characterised in that:

The descending control information format DCI format 2-0 for being L for aggregation level in the s of search space, according to PDCCH candidate The sequence of index from low to high, or sequence or equally spaced mode from high to low, from the M of configuration_s,LA PDCCH candidate selection M'_s,LA PDCCH that should retain is candidate, M'_s,LIt is the maximum number for the PDCCH candidate that DCI format 2-0 allows, M_s,L> 0, M'_s,L>0。

11. method according to claim 2, it is characterised in that:

The DCI format 2-0 for being L for aggregation level in the s of search space, first according to Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C- At least one information in RNTI, time slot format indicating cell radio network temporary identifier SFI-RNTI and time slot index, calculates The M configured out_s,LThe first PDCCH candidate that should retain in a PDCCH candidate, then selected based on first PDCCH candidate Other M'_s,L- 1 PDCCH that should retain is candidate, M'_s,LIt is the maximum number for the PDCCH candidate that DCI format 2-0 allows, M_s,L> 0, M'_s,L>0。

12. method as claimed in claim 11, it is characterised in that:

It is described that other M' are determined based on first PDCCH candidate_s,L- 1 PDCCH that should retain is candidate, comprising:

Since should retain the first PDCCH candidate, everyA PDCCH candidate, which selects one, to be retained PDCCH is candidate, until selecting M' again_s,LUntil -1 PDCCH that should retain is candidate.

13. a kind of determination method of physical downlink control channel PDCCH, comprising:

The down control channel is respectively configured to each downlink control channel format in search space, by high-level signaling in base station PDCCH number of candidates of the format in each aggregation level；

14. a kind of determination method of physical downlink control channel PDCCH, comprising:

The base station is to each aggregation level in each search space for belonging to the CORESET, in the range of the W CCE Determine the running time-frequency resource position of the PDCCH candidate of configuration；

The base station selects a PDCCH candidate from the PDCCH candidate of configuration, sends Downlink Control Information as to terminal PDCCH。

15. method as claimed in claim 14, it is characterised in that:

At interval ofA CCE selects a CCE, until selecting W CCE, N_CCE,pIt is for forming the CCE of the CORESET Number,It indicates to be rounded downwards；

Wherein, the threshold value for the CCE quantity that W carries out channel estimation according to terminal determines.

16. the method as described in claims 14 or 15, it is characterised in that:

The base station determines the running time-frequency resource position of the PDCCH candidate of configuration in the range of the W CCE, comprising: to search Aggregation level L in the s of space determines the running time-frequency resource position of the PDCCH candidate of configuration in the following manner:

In the range of the W CCE, M is determined according to the sequence of CCE index from low to high_s,LThe time-frequency of a PDCCH candidate provides Source position；Or

In the range of the W CCE, M is determined according to the sequence of CCE index from high to low_s,LThe time-frequency of a PDCCH candidate provides Source position；Or

17. a kind of detection method of physical downlink control channel PDCCH, comprising:

The terminal is attempted to receive the downlink that PDCCH channel is carried in the running time-frequency resource position of the PDCCH candidate of the reservation Control information.

18. method as claimed in claim 17, it is characterised in that:

The terminal determines the PDCCH candidate that should retain in the PDCCH candidate configured, comprising: the terminal is to each search space Interior each aggregation level executes PDCCH candidate respectively and abandons operation, and the PDCCH candidate abandons operation and includes:

19. method as claimed in claim 18, it is characterised in that:

The terminal executes PDCCH candidate to each aggregation level in each search space respectively and abandons operation, comprising: according to search The sequence of space number from low to high, successively executes PDCCH candidate to each polymer grade in each search space respectively and abandons operation.

20. method as claimed in claim 18, it is characterised in that:

To the aggregation level L in the s of search space, if the number M of the PDCCH candidate of configuration_s,L> 0 and what is be calculated should retain PDCCH candidate number M'_s,L=0, then enable M'_s,L=1；Or

Notify terminal for calculating M' by high-level signaling_s,LNumerical value n_s, M'_s,LIt is that aggregation level L in the s of search space should be protected The number of the PDCCH candidate stayed；By formulaCalculate M'_{S, L}, wherein it is empty for the search in current time slots Between s, α be equal to n_sDivided by the n of multiple search spaces other in current time slots_sThe quotient that the sum of value obtains,It indicates to be rounded downwards；Or Person

21. method as claimed in claim 18, it is characterised in that:

It is suitable according to the sequence of PDCCH candidate index from low to high, or from high to low to the aggregation level L in the s of search space Sequence, from the M of configuration_s,LM' is selected in a PDCCH candidate_s,LA PDCCH candidate that should retain；Or

To the aggregation level L in the s of search space, everyA PDCCH is candidate, from the M of configuration_s,LIt is selected in a PDCCH candidate It is candidate as the PDCCH that should retain to select a PDCCH, until selecting M'_s,LUntil a PDCCH candidate；

Wherein, M'_s,LIt is the number of the PDCCH candidate that should retain determined according to first rule, M_s,L> 0, M'_s,L> 0, It indicates to be rounded downwards.

22. method as claimed in claim 18, it is characterised in that:

The descending control information format DCI format 2-0 for being L for aggregation level in the s of search space, according to PDCCH candidate The sequence of index from low to high, or sequence or equally spaced mode from high to low, from the M of configuration_s,LA PDCCH candidate selection M'_s,LA PDCCH that should retain is candidate；Or

The DCI format 2-0 for being L for aggregation level in the s of search space, first according to Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C- At least one information in RNTI, time slot format indicating cell radio network temporary identifier SFI-RNTI and time slot index, calculates The M configured out_s,LThe first PDCCH candidate that should retain in a PDCCH candidate, then selected based on first PDCCH candidate Other M'_s,L- 1 PDCCH that should retain is candidate；

23. method as claimed in claim 22, it is characterised in that:

Other M' are determined based on first PDCCH candidate_s,L- 1 PDCCH that should retain is candidate, comprising: should protect from described The first PDCCH candidate stayed starts, everyA PDCCH candidate selects the PDCCH that should retain candidate, Zhi Daozai Select M'_s,LUntil -1 PDCCH that should retain is candidate.

24. a kind of detection method of physical downlink control channel PDCCH, comprising:

The terminal is to each aggregation level in each search space for belonging to the CORESET, in the range of the W CCE Determine the running time-frequency resource position of PDCCH candidate to be detected；

The terminal is attempted reception PDCCH channel and is carried down in the running time-frequency resource position of the PDCCH candidate to be detected Row control information.

25. method as claimed in claim 24, it is characterised in that:

26. the method as described in claim 24 or 25, it is characterised in that:

The terminal determines the running time-frequency resource position of the PDCCH candidate of configuration in the range of the W CCE, comprising: to search Aggregation level L in the s of space determines the running time-frequency resource position of the PDCCH candidate of configuration in the following manner:

27. a kind of determining device of physical downlink control channel PDCCH, comprising:

PDCCH selecting module, for selecting a PDCCH candidate to send as to terminal from the PDCCH of reservation candidate The PDCCH of Downlink Control Information.

28. a kind of determining device of physical downlink control channel PDCCH, comprising:

PDCCH candidate's determining module, for each aggregation level in each search space for belonging to the CORESET, in the W The running time-frequency resource position of the PDCCH candidate of configuration is determined in the range of a CCE；

PDCCH selecting module sends downlink as to terminal for selecting a PDCCH candidate from the PDCCH of configuration candidate Control the PDCCH of information.

29. a kind of base station, including memory, processor and it is stored on the memory and can runs on the processor Computer program, which is characterized in that the processor executes the processing of the method as described in claim 1-16.

30. a kind of detection device of physical downlink control channel PDCCH, comprising:

PDCCH detection module is attempted to receive PDCCH channel institute for the running time-frequency resource position of the PDCCH candidate in reservation The Downlink Control Information of carrying.

31. a kind of detection device of physical downlink control channel PDCCH, comprising:

PDCCH candidate's determining module, for each aggregation level in each search space for belonging to the CORESET, in the W The running time-frequency resource position of PDCCH candidate to be detected is determined in the range of a CCE；

PDCCH detection module, for attempting to receive PDCCH channel in the running time-frequency resource position of the PDCCH candidate to be detected The Downlink Control Information carried.

32. a kind of terminal, including memory, processor and it is stored on the memory and can runs on the processor Computer program, which is characterized in that the processor executes the processing of the method as described in claim 17-26.