CN103428858B - The sending method of control signaling, the detection method of control signaling, terminal and base station - Google Patents
The sending method of control signaling, the detection method of control signaling, terminal and base station Download PDFInfo
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Abstract
The invention provides a kind of sending method of control signaling, the detection method of control signaling, terminal and base station, wherein, detection method includes：Terminal receives the configuration signal for carrying candidate's control signaling transfer resource positional information that base station is sent；Terminal determines to need the aggregation level N (1) ... N (n) detected according to configuration signal, the DMRS port set used according to the position candidate under aggregation level N (i) in RB determines the DMRS port set that the position candidate under current aggregation level N (j) uses in the RB, or, according to aggregation level N (1) ..., the DMRS port set that the position candidate under N (n) under any aggregation level uses in RB is that the subset for the DMRS port set that the position candidate in the RB under N (p) uses determines DMRS port set that the position candidate under any aggregation level uses.Channel estimation number and implementation complexity can be reduced using the present invention.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of sending method of control signaling, the detection method of control signaling,
Terminal and base station.
Background technology
In Long Term Evolution (Long term evolution, abbreviation LTE) system and increase LTE (LTE-Advance) system
Middle down physical layer control signaling, which contains terminal, needs related downstream grants (DL Grant) information of the downlink transfer known
Uplink authorization (UL Grant) information related to the uplink that UE needs are known, to indicate transfer resource position, modulation is compiled
The related information of the various transmission such as code mode, these physical layer control signalings are in Physical Downlink Control Channel (Physical
Downlink Control channel, PDCCH) on be transmitted.Here physical layer control signaling is primarily referred to as physical layer
The proprietary control signaling of user.
In the version (Release, abbreviation R) 8/9 of LTE system and the R10 of LTE-Advance system versions, thing is transmitted
The physical layer control channel of reason layer control signaling is generally disposed at top n OFDM (Orthogonal Frequency
Division Multiplexing, OFDM) send on symbol, this N number of symbol is generally referred to as control signaling transmission region.
The available transmission of existing control signaling transmission region (the first control signaling transmission region, the first control signaling region)
Resource is divided into multiple control channel unit (CCE) resource units, and control information is taken resource and divided in units of CCE
Match somebody with somebody, resource units CCE here can further be subdivided into multiple REGs again, and a CCE is by multiple discontinuous REGs groups
Into usually 9 resource units groups (REGs) form a CCE, and further each REG is by multiple basic resources unit groups
Into.
Proprietary and publicly-owned control signaling is all transmitted by resource units of CCE.Then REG resources corresponding to being mapped to
On, further it is mapped on multiple Physical Resource Block (PRB) RE (Resource element, least resource unit).Eventually
End carries out blind Detecting generally according in the following manner：Calculate proprietary control signaling, the original position of publicly-owned control signaling, here we
It is primarily upon proprietary control signaling：
The aggregation level of the control signaling blind Detecting of table 1 and blind check number
It can be seen that the control signaling transfer resource of user's distribution is not continuous, prelisted in multi-antenna systems to closed loop
Code technology out tape carrys out many difficulties, hence in so that control signaling region closed loop difficult to use can only be prelisted using diversity technique
Code technology.Main cause be the first control signaling region demodulation pilot design and information feedback in terms of have it is very big
Design difficulty, therefore control signaling is all only to support discontinuous resource transmission and diversity technique in existing version.
In the version after R10, in order to improve the transmission capacity of control channel, the control signaling of more users is supported,
New control channel region (the second control signaling transmission region, the second control signaling region) is opened up in design consideration, and same
UE control signaling transfer resource can be continuous running time-frequency resource, to support closed loop precoding technology, carry and done control information
Transmission performance.
The control signaling region of new and old edition is as shown in figure 1, physical down of this method in original R8/9/10 is shared
Channel (PDSCH) transmission region transfers fractional transmission resource and is used for new control signaling transmission region, can cause control signaling
Closed loop precoding technology is supported during transmission, lifting control signaling capacity supports the control signaling of more users.We can claim
The second control signaling area transmissions control channel for the second control channel or enhanced PDCCH (enhanced PDCCH,
ePDCCH)。
Separately below from detection resource granularity, position candidate (ePDCCH candidates) pilot tone end of ePDCCH transmission
Mouthful, transmission means etc. introduces some ePDCCH detection method.
Typically, since it will be taken without the control information after the extra information notice encoded modulation of terminal more
Few transfer resource, therefore, base station and terminal can be to arrange a basic resource allocation unit as smallest allocation granularity, Ran Houjin
Several sizes for taking resource of one step agreement, the polymerization of generally one or more resource allocation units, N number of resource allocation unit
Polymerization be referred to as aggregation level N, base station can send the control information after coded modulation, terminal meeting with a kind of size therein
Several resource sizes that blind Detecting is arranged again, it is referred to as several aggregation levels of detection agreement.It is general to define one substantially
Resource units eCCE, eCCE are similar with former CCE function, can borrow early version CCE's in the second control area eCCE
Definition is slightly made an amendment, and can also newly be defined, and can be fixed size (size) or variable size.
Then, control signaling can define different aggregation levels based on eCCE, for example polymerize 1,2,4,8 or
1,2,4 or 1,3,5,7 etc..So different aggregation levels just represents different resource sizes.Terminal, which also just compares, to be directed to
Carry out to property blind Detecting this several aggregation level.
UE is detected for these candidates.Will to candidates carry out one by one blind Detecting, it is necessary to first determine
Each eCCE resources that candidates is included are demodulated using what pilot frequency port.In the second control signaling transmission region,
The proprietary demodulation pilot tone (DMRS) in R10 can be reused to demodulate control signaling, support precoding technique well.DMRS is also referred to as
For the proprietary demodulation pilot tones (UE Specific RS) of UE, its main function is demodulated with control signaling or data, specifically here
Refer to the demodulation of descending control signaling information.In early version, it is designed mainly for the demodulation of data message, there is 8 correspondences
DMRS port (port), maximum support 8 layers, respectively Port 7-14.Typically only use 4 ends in the second control signaling region
Mouthful it is used to demodulate control signaling, is Port7-10.
The available resources that the second control signaling region in one Physical Resource Block RB includes, can be divided into multiple resource sets
Close, specific point-score include it is a variety of, such as the mode of frequency division, time division way, code division mode and some hybrid modes.Need to define
The corresponding relation of resource set (Resource set) and pilot frequency port, which could be belonged to according to the eCCE resources taken in detection
Individual or which resource set, to determine the pilot frequency port used.
UE when carrying out blind Detecting to ePDCCH, the resource size that is taken in RB according to ePDCCH candidates come
Resource set and the relation of the pilot frequency port used are determined, such as：
When 1resource set are occupied, the relation of pilot frequency ports of the resource set with using is as shown in table 2：
The relation of the resource set of table 2 and the pilot frequency port used
| Resource set 1 | Port a |
| Resource set 2 | Port b |
| Resource set 3 | Port c |
| Resource set 4 | Port d |
When 2resource set are occupied, the relation such as table 3 or the institute of table 4 of resource set and the pilot frequency port used
Show：
The relation of the resource set of table 3 and the pilot frequency port used
| Resource set 1 | Port a |
| Resource set 2 | Port a |
| Resource set 3 | Port d |
| Resource set 4 | Port d |
The relation of the resource set of table 4 and the pilot frequency port used
| Resource set 1 | Port b |
| Resource set 2 | Port b |
| Resource set 3 | Port c |
| Resource set 4 | Port c |
When 4resource set are occupied, the relation of pilot frequency ports of the resource set with using is as shown in table 5：
The relation of the resource set of table 5 and the pilot frequency port used
The problem of prior art is present be：By taking following ePDCCH candidates as an example, each grid represents one
Resource set, if the aggregation level (Aggregation Level, AL) that the needs of configuration detect includes polymerization 1,2,4,
8, wherein AL 1,2,4 be centralized mapping (Localized) transmission, and AL=8 is the transmission of scattered (Distributed).Often
EPDCCH candidates include candidates as shown in Figure 2 under individual aggregation level, in UE to ePDCCH canidates
When being detected, due to in each RB, it may appear that need situation about all being estimated port a~port d, channel is estimated
Metering number is more, and higher implementation complexity can be brought to terminal.
The content of the invention
The embodiments of the invention provide a kind of sending method of control signaling, the detection method of control signaling, terminal and base
Stand, to solve because of the higher complexity that existing control channel detection technique channel estimation number be present excessively and is brought to terminal
Degree problem.
The embodiments of the invention provide a kind of sending method of control signaling, this method includes：
Base station is that terminal configures control signaling candidate transport resource location information, the control signaling candidate transport resource location
Packet enhanced Physical Downlink Control Channel under N (n), and each aggregation level containing multiple aggregation level N (1) ...
(ePDCCH) position candidate of transmission, n are the integer more than 1；
When the base station is selected corresponding to one of position candidate in candidate's control signaling transfer resource position
Frequency resource location sends the configuration signal for carrying the control signaling candidate transport resource location information to the terminal.
Preferably, the position candidate under N (n) under any aggregation level is in resource block for the aggregation level N (1) ...
(RB) set of proprietary demodulation pilot tone (DMRS) port used in is the DMRS ends that the position candidate in the RB under N (i) uses
The subset of mouth set, wherein, i is the positive integer less than or equal to n.
Preferably, the aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
Preferably, the DMRS port set that the position candidate under any aggregation level uses in RB include two or
Three DMRS ports.
Preferably, when the DMRS port set that the position candidate under any aggregation level uses in RB includes two
When, two DMRS ports are port 7 and port 9, or, it is port 8 and port 10.
The embodiment of the present invention additionally provides a kind of detection method of control signaling, and this method includes：
Terminal receives the configuration signal for the carrying control signaling candidate transport resource location information that base station is sent；
The aggregation level N (1) ... N (n) that the terminal needs to detect according to configuration signal determination, and it is each poly-
Close the position candidate under rank；
The proprietary demodulation pilot tone that the terminal uses according to the position candidate under aggregation level N (i) in resource block (RB)
(DMRS) port set determines the DMRS port set that the position candidate under current aggregation level N (j) uses in the RB, its
In, i and j are the positive integer less than or equal to n, and are differed, and n is the integer more than 1；Or
Aggregation level N (1) ... the DMRS that the position candidate under N (n) under any aggregation level uses in RB
Port set is the subset for the DMRS port set that the position candidate in the RB under N (i) uses, wherein, i is less than or equal to n's
Positive integer.
Preferably, the proprietary demodulation pilot tone that the position candidate under the aggregation level N (i) uses in resource block (RB)
(DMRS) port set includes two or three DMRS ports.
Preferably, the aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
Preferably, when the DMRS port set that the position candidate under the aggregation level N (i) uses in RB includes two
During DMRS port, two DMRS ports are port 7 and port 9, or, it is port 8 and port 10.
Preferably, the terminal determines the DMRS port that the position candidate under current aggregation level N (j) uses in the RB
After gathering or determining the DMRS port set that the position candidate under any aggregation level uses, methods described is also wrapped
Include：
The high-level signaling that the terminal is sent according to the base station determines the position candidate under current aggregation level N (j)
The DMRS port used in the RB.
Preferably, methods described also includes：The terminal takes according to the position candidate under aggregation level N (k) in RB
Resource set determine the resource set that the position candidate under current aggregation level N (m) takes in the RB, wherein, m ＜ k ＜=4.
The embodiment of the present invention separately provides a kind of base station, and the base station includes：
Configuration module, for configuring control signaling candidate transport resource location information for terminal, control signaling candidate passes
Defeated resource location information includes the enhanced physical down multiple aggregation level N (1) ... under N (n), and each aggregation level
The position candidate of control channel (ePDCCH) transmission, n are the integer more than 1；
Sending module, for selecting one of position candidate corresponding in candidate's control signaling transfer resource position
Running time-frequency resource position the configuration signal for carrying the control signaling candidate transport resource location information is sent to the terminal.
Preferably, the position candidate under N (n) under any aggregation level is in resource block for the aggregation level N (1) ...
(RB) set of proprietary demodulation pilot tone (DMRS) port used in is the DMRS ends that the position candidate in the RB under N (i) uses
The subset of mouth set, wherein, i is the positive integer less than or equal to n.
Preferably, the aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
Preferably, the DMRS port set that the position candidate under any aggregation level uses in RB include two or
Three DMRS ports.
Preferably, when the DMRS port set that the position candidate under any aggregation level uses in RB includes two
When, two DMRS ports are port 7 and port 9, or, it is port 8 and port 10.
The embodiment of the present invention provides a kind of terminal again, and the terminal includes：
Receiving module, the carrying control signaling candidate transport resource location information sent for receiving base station match somebody with somebody confidence
Order；
Determining module, for being determined to need the aggregation level N (1) ... N (n) detected according to the configuration signal, with
And the position candidate under each aggregation level；Used according to the position candidate under aggregation level N (i) in resource block (RB) proprietary
The set of demodulation pilot tone (DMRS) port determines the DMRS port that the position candidate under current aggregation level N (j) uses in the RB
Set, wherein, i and j are the positive integer less than or equal to n, and are differed, and n is the integer more than 1；Or the aggregation level
The DMRS port set that position candidate under N (n) under any aggregation level uses in RB is N (i) in the RB to N (1) ...
Under the subset of DMRS port set that uses of position candidate, wherein, i is the positive integer less than or equal to n.
Preferably, the proprietary demodulation pilot tone that the position candidate under the aggregation level N (i) uses in resource block (RB)
(DMRS) port set includes two or three DMRS ports.
Preferably, the aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
Preferably, when the DMRS port set that the position candidate under the aggregation level N (i) uses in RB includes two
During DMRS port, two DMRS ports are port 7 and port 9, or, it is port 8 and port 10.
Preferably, the determining module, is additionally operable to：Current polymer grade is determined according to the high-level signaling of base station transmission
The DMRS port that position candidate under other N (j) uses in the RB.
Preferably, the determining module, is additionally operable to：The money taken according to the position candidate under aggregation level N (k) in RB
Source collection determines the resource set that the position candidate under current aggregation level N (m) takes in the RB, wherein, m ＜ k ＜=4.
The embodiment of the present invention, by reusing port so that the port number occurred in each RB is reduced, and is estimated so as to reduce channel
Metering number, thus implementation complexity is reduced, and then reduce detection delay.
Brief description of the drawings
Fig. 1 is the control signaling area schematic of existing new and old edition；
Fig. 2 is the schematic diagram of the candidates that ePDCCH candidates are included under existing each aggregation level；
Fig. 3 is present invention determine that the schematic diagram of the port embodiment one used under each aggregation level；
Fig. 4 is present invention determine that the schematic diagram of the port embodiment two used under each aggregation level；
Fig. 5 is present invention determine that the schematic diagram of the port embodiment three used under each aggregation level；
Fig. 6 is present invention determine that the schematic diagram of the port embodiment four used under each aggregation level；
Fig. 7 is present invention determine that the schematic diagram of the port embodiment five used under each aggregation level；
Fig. 8 is the structural representation of base station embodiment of the present invention；
Fig. 9 is the structural representation of terminal embodiment of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
The embodiments of the invention provide a kind of sending method of control signaling, the embodiment is described from base station side, should
Method includes：
Step 11, base station are that terminal configures control signaling candidate transport resource location information, the control signaling candidate transport
Resource location information includes the enhanced physical down control multiple aggregation level N (1) ... under N (n), and each aggregation level
The position candidate of channel (ePDCCH) transmission processed；
Wherein, position candidate of the aggregation level N (1) ... under N (n) under any aggregation level is at resource block (RB)
The set of proprietary demodulation pilot tone (DMRS) port inside used is the DMRS port collection that the position candidate in the RB under N (i) uses
The subset of conjunction, wherein, i is the positive integer less than or equal to n, and n is the integer more than 1；The aggregation level N (i) can be polymerization
Rank 1, aggregation level 2, aggregation level 4 or aggregation level 8；What the position candidate under any aggregation level used in RB
DMRS port set includes two or three DMRS ports；Used when the position candidate under any aggregation level in RB
When DMRS port set includes two, two DMRS ports are port 7 and port 9, or, it is port 8 and port 10；
Step 12, the base station select one of position candidate pair in candidate's control signaling transfer resource position
The running time-frequency resource position answered sends the configuration signal for carrying the control signaling candidate transport resource location information to the terminal.
Correspondingly, the embodiment of the present invention additionally provides a kind of detection method of control signaling, and the embodiment is entered from end side
Row description, this method include：
Step 21, terminal receive the configuration signal for the carrying control signaling candidate transport resource location information that base station is sent；
The aggregation level N (1) ... N (n) that step 22, the terminal need to detect according to configuration signal determination,
And the position candidate under each aggregation level；
The proprietary solution that step 23, the terminal use according to the position candidate under aggregation level N (i) in resource block (RB)
The set of pilot tone (DMRS) port is adjusted to determine the DMRS port collection that the position candidate under current aggregation level N (j) uses in the RB
Close, wherein, i and j are the positive integer less than or equal to n, and are differed, and n is the integer more than 1；Or
Aggregation level N (1) ... the DMRS that the position candidate under N (n) under any aggregation level uses in RB
Port set is the subset for the DMRS port set that the position candidate in the RB under N (i) uses, wherein, i is less than or equal to n's
Positive integer.
Additionally it is possible that the method further comprises：Terminal takes according to the candidates under aggregation level N (k) in RB
Resource set determine the resource set that the candidates under current aggregation level N (m) takes in the RB, wherein, m ＜ k ＜=
4。
Technical scheme is described in detail the angle interacted below from terminal and base station：
Embodiment one
Base station sends control signaling in the downlink transfer resource in the second control signaling region, and base station sends descending control letter
There is adaptive, the respectively base of several code checks when can select the Size that control signaling detects to be controlled signalling when making
In several different aggregation levels that eCCE is defined：
Aggregation level N (1), aggregation level N (2), aggregation level N (3), aggregation level N (4), wherein N (1)-N (4) are whole
Number.Common value has respectively 1,2,4,8.Here this value is not limited to, is also not necessarily limited to 4 kinds of aggregation levels or 2
Kind, other situations such as 3 kinds of aggregation levels.
For base station and terminal, it can arrange following mapping relations be present：
If ePDCCH candidates takes 1 eCCE in RB, and the eCCE corresponds to a resource
Set, the corresponding DMRS port of each resource set are determined according to now resource set and DMRS port relation table,
Illustrate by taking the table 5 in background technology as an example, but be not limited to the relation of table description.Assuming that a in table, b, c, d are respectively 7,9,8,
10 or other values, such as 7,8,9,10, are illustrated, then table 5 can be presented as table 5-1 for hypothesis herein before
Form.
The relation of table 5-1 resource sets and the pilot frequency port used
| Resource set1 | Port 7 |
| Resource set 2 | Port 9 |
| Resource set 3 | Port 8 |
| Resource set 4 | Port 10 |
If the resource set taken is Resource1 therein, its demodulation fixed or be configured so that
Pilot frequency port is Port7, and if Resource2 therein, its demodulation pilot frequency port fixed or be configured so that is
Port9, if Resource3 therein, its demodulation pilot frequency port fixed or be configured so that is Port8, if it
In Resource4, its demodulation pilot frequency port fixed or be configured so that is Port10；If the situation of configuration, then be
Base station is configured by configuration signal.
If ePDCCH candidates takes 2 eCCE in RB, the two eCCE correspond to 2 resource
Sets, then according to resource set when 2resource set are occupied in background technology and DMRS port relation tables 3 or
Table 4 determines specific DMRS port, it is assumed that a, b, c, d are respectively 7,9,8,10, then table 3 can be presented as table 3-1 shape
Formula, table 4 can be presented as table 4-1 form.
The relation of table 3-1 resource sets and the pilot frequency port used
| Resource set1 | Port 7 |
| Resource set 2 | Port 7 |
| Resource set 3 | Port 10 |
| Resource set 4 | Port 10 |
The relation of table 4-1 resource sets and the pilot frequency port used
| Resource set1 | Port 9 |
| Resource set 2 | Port 9 |
| Resource set 3 | Port 8 |
| Resource set 4 | Port 8 |
If Resource 1 and 2, this two pieces of Resource are fixed or are configured so that pilot frequency port 7 carries out channel
Estimation and demodulation；If Resource3 and 4, this two pieces of Resource are fixed or are configured so that pilot frequency port 10 is carried out
Channel estimation and demodulation；Or if Resource 1 and 2, this two pieces of Resource are fixed or are configured so that pilot tone
Port 9 carries out channel estimation and demodulation；If Resource3 and 4, this two pieces of Resource are fixed or are configured so that and lead
Frequency port 8 carries out channel estimation and demodulation.
If ePDCCH candidates takes 4 eCCE in RB, this 4 eCCE correspond to 4 resource
DMRS port can be according to other aggregation levels corresponding to resource sets when sets, 4resource set are occupied
Under the DMRS ports that use of candidates gather to determine；Either according to the candidates under other aggregation levels
The DMRS ports set used combines high-rise configuration signal to determine.
The complexity of channel estimation can be minimized by the configuration shown in Fig. 3,1 time ePDCCH's of aggregation level
2 candidates, respectively comprising Resourceset0 and 1, the DMRS used in each RB be present in candidates
Port is a and b, corresponds to 7 and 9 respectively.
There is a candidate in the ePDCCH candidates under aggregation level 2, should in each RB
Candidate includes Resource set0 and 1 polymerization in RB, and two Resource sets correspond to a DMRS port,
Because DMRS port collection corresponding to the resource set that ePDCCH candidates during aggregation level 1 take is combined into
Port7 and 9, and due to the presence for needing to meet subset relation, the DMRS port used can only be port7or port 9；Can
Specifically used port7 or port9 are determined with the high-level signaling issued according to base station.
There is 1 candidate in the ePDCCH candidates under aggregation level 4, should in each RB
Candidates includes 4 all corresponding DMRS of Resource set, 4 Resource sets in the RB
Port, here due to aggregation level 1 when ePDCCH candidates take resource set corresponding to DMRS port
Collection is combined into port7 and 9, therefore can be one in port7 and port9, specifically determines which is by the 1bit signalings of base station
Individual port.This mode determines jointly equivalent to the DMRS port that the 1bit signalings according to base station and aggregation level 1 use.
It must belong to the set of port7 and 8 that the corresponding DMRS port of 4 Resource sets, which can be fixed, so take common factor can
To be defined as port7.
There are two kinds of situations under aggregation level 8：
A kind of situation is the situation that 4 or 0 Resource set are accounted in RB with accounting for 4 under aggregation level 4
Resource set situation determines that the method for pilot frequency port is identical；
Another situation includes 2 resource set polymerization, is a candidate in RB to be present
The situation of resource set 0,1 polymerization, determine that method is identical with the pilot frequency port for the situation that aggregation level is 2.
In this embodiment, the DMRS port that ePDCCH candidates are used under each aggregation level are polymer grade
The subset that ePDCCH candidates under other 1 are used.
Embodiment two
Situation in embodiment one, the complexity of channel estimation can also be minimized by the configuration shown in Fig. 4：
There are 2 candidates in 1 time ePDCCH of aggregation level candidates, include respectively in each RB
Resource set2 and 3, the DMRS port used are a and b, correspond to 8 and 10 respectively.
There is a candidate in the ePDCCH candidates under aggregation level 2, should in each RB
Candidate includes Resource set2 and 3 polymerization in RB, and two Resource sets correspond to a DMRS port,
Because DMRS port collection corresponding to the resource set that ePDCCH candidates during aggregation level 1 take is combined into
Port8 and 10, and due to the presence for needing to meet subset relation, the DMRS port used can only be port8or port 10；
Specifically used port8 or port10 can be determined according to the high-level signaling that base station issues.
There is 1 candidate in the ePDCCH candidates under aggregation level 4, should in each RB
Candidates includes 4 all corresponding DMRS of Resource set, 4 Resource sets in the RB
Port, here due to aggregation level 1 when ePDCCH candidates take resource set corresponding to DMRS port
Collection is combined into port8 and 10, therefore can be port8, one in 10, specifically determines which is by the 1bit signalings of base station
port.This mode determines jointly equivalent to the DMRS port that the 1bit signalings according to base station and aggregation level 1 use.Also may be used
Must belong to the set of port7 and 8 to fix the corresponding DMRS port of 4 Resource sets, so take common factor can be with
It is defined as port8.
There are two kinds of situations under aggregation level 8：
A kind of situation is the situation that 4 or 0 Resource set are accounted in RB with accounting for 4 under aggregation level 4
Resource set situation determines that the method for pilot frequency port is identical.
Another situation includes 2 resource set polymerization, is a candidate in RB to be present
Resource set2, the situation of 3 polymerization, determine that method is identical with the pilot frequency port for the situation that aggregation level is 2.
In this embodiment, the DMRS port that ePDCCH candidates are used under each aggregation level are polymer grade
The subset that ePDCCH candidates under other 1 are used.
Embodiment three
Situation in embodiment one, the complexity of channel estimation can also be minimized by the configuration shown in Fig. 5：
1 candidate in each RB be present in 1 time ePDCCH of aggregation level candidates, comprising
Resource set0, the DMRS port used are a, corresponding ports 7.
There is a candidate in the ePDCCH candidates under aggregation level 2, should in each RB
Candidate includes Resource set0 and 1 polymerization in RB, and two Resource sets correspond to a DMRS port,
Because DMRS port collection corresponding to the resource set that ePDCCH candidates during aggregation level 1 take is combined into
Port7, and due to the presence for needing to meet subset relation, the DMRS port used are port7.
There is 1 candidate in the ePDCCH candidates under aggregation level 4, should in each RB
Candidates includes 4 all corresponding DMRS of Resource set, 4 Resource sets in the RB
Port, here due to aggregation level 1 when ePDCCH candidates take resource set corresponding to DMRS port
Collection is combined into port7, therefore the corresponding DMRS port of fixed 4 Resource sets is also port7.
There are two kinds of situations under aggregation level 8：
A kind of situation is the situation that 4 or 0 Resource set are accounted in RB with accounting for 4 under aggregation level 4
Resource set situation determines that the method for pilot frequency port is identical.
Another situation includes 2 resource set polymerization, is a candidate in RB to be present
The situation of resource set 0,1 polymerization, determine that method is identical with the pilot frequency port for the situation that aggregation level is 2.
In this embodiment, the DMRS port all sames that ePDCCH candidates are used under each aggregation level, it is
port7。
Example IV
Situation in embodiment one, the complexity of channel estimation can also be minimized by the configuration shown in Fig. 6：
1 candidate in each RB be present in 1 time ePDCCH of aggregation level candidates, comprising
Resource set1, the DMRS port used are b, corresponding port9.
There is a candidate in the ePDCCH candidates under aggregation level 2, should in each RB
Candidate includes Resource set0 and 1 polymerization in RB, and two Resource sets correspond to a DMRS port,
Because DMRS port collection corresponding to the resource sets that ePDCCH candidates during aggregation level 1 take is combined into
Port9, and due to the presence for needing to meet subset relation, the DMRS port used are port9.
There is 1 candidate in the ePDCCH candidates under aggregation level 4, should in each RB
Candidates includes 4 all corresponding DMRS of Resource sets, 4 Resource sets in the RB
Port, here due to aggregation level 1 when ePDCCH candidates take resource set corresponding to DMRS port
Collection is combined into port9, it is thus determined that the corresponding DMRS port of 4 Resource sets is also port9.
There are two kinds of situations under aggregation level 8：
A kind of situation is the situation that 4 or 0 Resource sets are accounted in RB with accounting for 4 under aggregation level 4
Resource sets situation determines that the method for pilot frequency port is identical.
Another situation includes 2 resource sets polymerization, is a candidate in RB to be present
The situation of resource set 0,1 polymerization, determine that method is identical with the pilot frequency port for the situation that aggregation level is 2.
In this embodiment, the DMRS port all sames that ePDCCH candidates are used under each aggregation level, it is
port9。
Embodiment five
Situation in embodiment one, the complexity of channel estimation can be minimized by the configuration shown in Fig. 6：
1 candidate in each RB be present in 1 time ePDCCH of aggregation level candidates, comprising
Resource set2, the DMRS port used are c, corresponding port8.
There is a candidate in the ePDCCH candidates under aggregation level 2, should in each RB
Candidate includes Resource set2 and 3 polymerization in RB, and two Resource sets correspond to a DMRS port,
Because DMRS port collection corresponding to the resource set that ePDCCH candidates during aggregation level 4 take is combined into
Port8 and 10, and due to the presence for needing to meet subset relation, the DMRS port used are port8or10, can pass through height
Layer signal deployment determines.
There are 2 candidates in the ePDCCH candidates under aggregation level 4, this 2 in each RB
Candidates respectively includes a Resource set in the RB, is resource set2 and 3, the two Resource
Each correspondences of sets one DMRS port, respectively port8 and port10.
There are two kinds of situations under aggregation level 8：
A kind of situation is the situation that 4 or 0 Resource set are accounted in RB with accounting for 4 under aggregation level 4
, can be true according to the DMRS ports used of the candidates under aggregation level 4 set in the case of resource set
The fixed DMRS port that it is used are one in port8 and 10, can be configured.
Another situation includes 2 resource sets polymerization, is a candidate in RB to be present
The situation of resource set 2,3 polymerization, determine that method is identical with the pilot frequency port for the situation that aggregation level is 2.
In this embodiment, the DMRS port set that ePDCCH candidates are used under each aggregation level is poly-
The subset of the DMRS ports set used in the case of closing rank 4.
The embodiment of the present invention, by reusing port so that the port number occurred in each RB is reduced, and is estimated so as to reduce channel
Metering number, thus implementation complexity is reduced, and then reduce detection delay.
As shown in figure 8, being the structural representation of base station embodiment of the present invention, the base station includes configuration module 81 and sends mould
Block 82, wherein：
Configuration module, for configuring control signaling candidate transport resource location information for terminal, control signaling candidate passes
Defeated resource location information includes the enhanced physical down multiple aggregation level N (1) ... under N (n), and each aggregation level
The position candidate of control channel (ePDCCH) transmission, n are the integer more than 1；
Sending module, for selecting one of position candidate corresponding in candidate's control signaling transfer resource position
Running time-frequency resource position the configuration signal for carrying the control signaling candidate transport resource location information is sent to the terminal.
Position candidate of the aggregation level N (1) ... under N (n) under any aggregation level makes in resource block (RB)
The set of proprietary demodulation pilot tone (DMRS) port is the DMRS port set that the position candidate in the RB under N (i) uses
Subset, wherein, i is the positive integer less than or equal to n.
Wherein, the aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
In addition, the DMRS port set that the position candidate under any aggregation level uses in RB includes two or three
Individual DMRS port；When the DMRS port set that the position candidate under any aggregation level uses in RB includes two,
Two DMRS ports are port 7 and port 9, or, it is port 8 and port 10.
Above-mentioned base station, by terminal send configuration signaling so that terminal can reuse port, so that in each RB
The port number of appearance is reduced, and reduces channel estimation number.
As shown in figure 9, being the structural representation of terminal embodiment of the present invention, the terminal includes receiving module 91 and determines mould
Block 92, wherein：
Receiving module, the carrying control signaling candidate transport resource location information sent for receiving base station match somebody with somebody confidence
Order；
Determining module, for being determined to need the aggregation level N (1) ... N (n) detected according to the configuration signal, with
And the position candidate under each aggregation level；Used according to the position candidate under aggregation level N (i) in resource block (RB) proprietary
The set of demodulation pilot tone (DMRS) port determines the DMRS port that the position candidate under current aggregation level N (j) uses in the RB
Set, wherein, i and j are the positive integer less than or equal to n, and are differed, and n is the integer more than 1；Or the aggregation level
The DMRS port set that position candidate under N (n) under any aggregation level uses in RB is N (i) in the RB to N (1) ...
Under the subset of DMRS port set that uses of position candidate, wherein, i is the positive integer less than or equal to n.
Wherein, the proprietary demodulation pilot tone that the position candidate under the aggregation level N (i) uses in resource block (RB)
(DMRS) port set includes two or three DMRS ports；When the position candidate under the aggregation level N (i) uses in RB
DMRS port set when including two DMRS ports, two DMRS ports are port 7 and port 9, or, be the He of port 8
Port 10.The aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8, etc..
In addition, the determining module, is additionally operable to：Current aggregation level is determined according to the high-level signaling of base station transmission
The DMRS port that candidates under N (j) is used in the RB.
Further, the determining module, is additionally operable to：Taken according to the candidates under aggregation level N (k) in RB
Resource set determine the resource set that the candidates under current aggregation level N (m) takes in the RB, wherein, m ＜ k ＜=
4。
Above-mentioned terminal, by reusing port so that the port number occurred in each RB is reduced, so as to reduce channel estimation time
Number, thus implementation complexity is reduced, and then reduce detection delay.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and said procedure can be stored in computer-readable recording medium, such as read-only storage, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, can also use the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, reference only to preferred embodiment to this hair
It is bright to be described in detail.It will be understood by those within the art that technical scheme can be modified
Or equivalent substitution, without departing from the spirit and scope of technical solution of the present invention, the claim model in the present invention all should be covered
Among enclosing.
Claims (22)
1. a kind of sending method of control signaling, it is characterised in that this method includes：
Base station is that terminal configures control signaling candidate transport resource location information, the control signaling candidate transport resource location information
Enhanced Physical Downlink Control Channel ePDCCH comprising multiple aggregation level N (1) ... under N (n), and each aggregation level is passed
Defeated position candidate, n are the integer more than 1；
The base station selects time-frequency corresponding to one of position candidate to provide in the control signaling candidate transport resource location
Source position sends the configuration signal for carrying the control signaling candidate transport resource location information to the terminal.
2. according to the method for claim 1, it is characterised in that：
Position candidate under N (n) under any aggregation level uses proprietary the aggregation level N (1) ... in resource block RB
The set of demodulation pilot tone DMRS port is the subset for the DMRS port set that the position candidate in the RB under N (i) uses, wherein, i
For the positive integer less than or equal to n.
3. according to the method for claim 2, it is characterised in that：
The aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
4. according to the method for claim 2, it is characterised in that：
The DMRS port set that position candidate under any aggregation level uses in RB includes two or three DMRS ends
Mouthful.
5. according to the method for claim 4, it is characterised in that：
When the DMRS port set that the position candidate under any aggregation level uses in RB includes two, this two
DMRS port is port 7 and port 9, or, it is port 8 and port 10.
6. a kind of detection method of control signaling, it is characterised in that this method includes：
Terminal receives the configuration signal for the carrying control signaling candidate transport resource location information that base station is sent；
The terminal determines to need the aggregation level N (1) ... N (n) detected, and each aggregation level according to the configuration signal
Under position candidate；
The proprietary demodulation pilot tone DMRS ends that the terminal uses according to the position candidate under aggregation level N (i) in resource block RB
Mouth set determines the DMRS port set that the position candidate under current aggregation level N (j) uses in the RB, wherein, i and j are equal
For the positive integer less than or equal to n, and differ, n is the integer more than 1；Or
Aggregation level N (1) ... the DMRS port collection that the position candidate under N (n) under any aggregation level uses in RB
Conjunction is the subset for the DMRS port set that the position candidate in the RB under N (i) uses, wherein, i is the positive integer less than or equal to n.
7. according to the method for claim 6, it is characterised in that：
The DMRS port set that position candidate under the aggregation level N (i) uses in RB includes two or three DMRS ends
Mouthful.
8. according to the method for claim 6, it is characterised in that：
The aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
9. according to the method for claim 7, it is characterised in that：
When the DMRS port set that the position candidate under the aggregation level N (i) uses in RB includes two DMRS ports,
Two DMRS ports are port 7 and port 9, or, it is port 8 and port 10.
10. according to the method for claim 6, it is characterised in that：
The terminal determines the DMRS port set or true that the position candidate under current aggregation level N (j) uses in the RB
After the DMRS port set that position candidate under fixed any aggregation level uses, methods described also includes：
The high-level signaling that the terminal is sent according to the base station determines the position candidate under current aggregation level N (j) at this
The DMRS port used in RB.
11. according to the method described in claim 6-10 any claims, it is characterised in that methods described also includes：
The resource set that the terminal takes according to the position candidate under aggregation level N (k) in RB determines current aggregation level N
(m) resource set that the position candidate under takes in the RB, wherein, m<k<=4.
12. a kind of base station, it is characterised in that the base station includes：
Configuration module, for configuring control signaling candidate transport resource location information, control signaling candidate transport money for terminal
Source location information includes enhanced physical down control letter of multiple aggregation level N (1) ... under N (n), and each aggregation level
The position candidate of road ePDCCH transmission, n are the integer more than 1；
Sending module, during for being selected in the control signaling candidate transport resource location corresponding to one of position candidate
Frequency resource location sends the configuration signal for carrying the control signaling candidate transport resource location information to the terminal.
13. base station according to claim 12, it is characterised in that：
Position candidate under N (n) under any aggregation level uses proprietary the aggregation level N (1) ... in resource block RB
The set of demodulation pilot tone DMRS port is the subset for the DMRS port set that the position candidate in the RB under N (i) uses, wherein, i
For the positive integer less than or equal to n.
14. base station according to claim 13, it is characterised in that：
The aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
15. base station according to claim 13, it is characterised in that：
The DMRS port set that position candidate under any aggregation level uses in RB includes two or three DMRS ends
Mouthful.
16. base station according to claim 15, it is characterised in that：
When the DMRS port set that the position candidate under any aggregation level uses in RB includes two, this two
DMRS port is port 7 and port 9, or, it is port 8 and port 10.
17. a kind of terminal, it is characterised in that the terminal includes：
Receiving module, the configuration signal of the carrying control signaling candidate transport resource location information for receiving base station transmission；
Determining module, for being determined to need the aggregation level N (1) ... N (n) detected according to the configuration signal, and it is each poly-
Close the position candidate under rank；The proprietary demodulation pilot tone used according to the position candidate under aggregation level N (i) in resource block RB
DMRS port set determines the DMRS port set that the position candidate under current aggregation level N (j) uses in the RB, wherein, i
It is the positive integer less than or equal to n with j, and differs, n is the integer more than 1；Or aggregation level N (1) ... the N
(n) the DMRS port set that the position candidate under under any aggregation level uses in RB is the position candidate in the RB under N (i)
The subset of the DMRS port set used, wherein, i is the positive integer less than or equal to n.
18. terminal according to claim 17, it is characterised in that：
The DMRS port set that position candidate under the aggregation level N (i) uses in RB includes two or three DMRS ends
Mouthful.
19. terminal according to claim 17, it is characterised in that：
The aggregation level N (i) is aggregation level 1, aggregation level 2, aggregation level 4 or aggregation level 8.
20. terminal according to claim 18, it is characterised in that：
When the DMRS port set that the position candidate under the aggregation level N (i) uses in RB includes two DMRS ports,
Two DMRS ports are port 7 and port 9, or, it is port 8 and port 10.
21. terminal according to claim 17, it is characterised in that：
The determining module, is additionally operable to：Determined according to the high-level signaling of base station transmission under current aggregation level N (j)
The DMRS port that position candidate uses in the RB.
22. according to the terminal described in claim 17-21 any claims, it is characterised in that：
The determining module, is additionally operable to：The resource set taken according to the position candidate under aggregation level N (k) in RB determines to work as
The resource set that position candidate under pre-polymerization level n (m) takes in the RB, wherein, m<k<=4.
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| CN108282872B (en) * | 2017-01-06 | 2023-06-06 | 中兴通讯股份有限公司 | Downlink control resource position indication method, determining method and related equipment |
| CN106899983A (en) * | 2017-03-03 | 2017-06-27 | 北京佰才邦技术有限公司 | Schedule information acquisition methods, terminal and baseband chip |
| WO2018210235A1 (en) * | 2017-05-15 | 2018-11-22 | 华为技术有限公司 | Communication method and device |
| CN108880769B (en) * | 2017-05-15 | 2021-06-08 | 华为技术有限公司 | Communication method and device |
| CN110581754B (en) | 2018-06-11 | 2021-05-11 | 电信科学技术研究院有限公司 | Method, equipment and device for sending and receiving request signal |
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