CN103428858A - Control signaling sending method, control signaling detecting method, terminal and base station - Google Patents
Control signaling sending method, control signaling detecting method, terminal and base station Download PDFInfo
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Abstract
The invention provides a control signaling sending method, a control signaling detecting method, a terminal and a base station. The control signaling detecting method comprises the following steps that the terminal receives a configuration signaling carrying candidate control signaling transmission position information and sent by the base station; the terminal determines aggregation levels N (1) to N (n) needing to be detected according to the configuration signaling, and determines a DMRS port set used by candidate positions, at the current aggregation level N (j), in an RB, according to a DMRS port set used by the candidate positions, at the aggregation levels N (i), in the RB, or the terminal determines a DMRS port set used by the candidate positions at any aggregation level according to the fact that the DMRS port set used by the candidate positions at any aggregation level of the aggregation levels N (1) to N (n) in the RB is a subset of the DMRS port set used by the candidate positions, at the aggregation level N (p), in the RB. According to the control signaling sending method, the control signaling detecting method, the terminal and the base station, the number of channel estimation times can be reduced and the achievement complexity can be reduced.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of sending method of control signal, detection method, terminal and the base station of control signal.
Background technology
At Long Term Evolution (Long term evolution, be called for short LTE) system and increase down physical layer control signal in LTE (LTE-Advance) system and comprised downstream grants (DL Grant) information that downlink transfer that terminal need to know is relevant and relevant uplink authorization (UL Grant) information of uplink that UE need to be known, indicate the transfer resource position, the information that the various transmission such as modulation coding mode are relevant, these physical layer control signals are transmitted on Physical Downlink Control Channel (Physical Downlink Control channel, PDCCH).The physical layer control signal here mainly refers to the proprietary control signal of user of physical layer.
Version (Release in the LTE system, be called for short R) 8/9 and the R10 of LTE-Advance system version in, the physical layer control channel of physical layer for transmission control signal generally is configured in top n OFDM (Orthogonal Frequency Division Multiplexing, OFDM) send on symbol, generally claim that this N symbol is the control signal transmission region.
Existing control signal transmission region (the first control signal transmission region, the first control signal zone) available transmission resources is divided into a plurality of control channels unit (CCE) resource units, control information takies resource and take CCE and distributed as unit, the resource units CCE here can further be subdivided into a plurality of REGs again, a CCE is comprised of a plurality of discontinuous REGs, be generally that 9 resource units groups (REGs) form a CCE, further each REG is comprised of a plurality of basic resources units.
Proprietary and publicly-owned control signal all be take CCE and is transmitted as resource units.Then be mapped on corresponding REG resource, further be mapped on the RE (Resource element, least resource unit) of a plurality of Physical Resource Block (PRB).Terminal is generally carried out blind Detecting in such a way: calculate proprietary control signal, and the original position of publicly-owned control signal, we mainly pay close attention to proprietary control signal here:
The polymerization rank of table 1 control signal blind Detecting and blind check number of times
The control signal transfer resource that can find out user assignment is not continuous, in multiaerial system, to the closed loop precoding technique to implement to bring a lot of difficulties, therefore makes the control signal zone can only use diversity technique and is difficult to use the closed loop precoding technique.Main cause is that demodulation pilot frequency design and the information feedback aspect in the first control signal zone has very large design difficulty, and therefore in existing version, control signal is all only to support discontinuous resource transmission and diversity technique.
In version after R10, in order to improve the transmission capacity of control channel, support the control signal of more users, design considers to open up new control channel zone (the second control signal transmission region, the second control signal zone), and the control signal transfer resource of same UE can be continuous running time-frequency resource, to support the closed loop precoding technique, put forward the transmission performance of having done control information.
The control signal zone of new and old edition as shown in Figure 1, this method is transferred the part transfer resource for new control signal transmission region at Physical Downlink Shared Channel (PDSCH) transmission region of original R8/9/10, can, so that control signal when transmission supported the closed loop precoding technique, promote the control signal that the control signal capacity is supported more users.We can claim that the control channel in the second control signal zone transmission is the second control channel or enhancement mode PDCCH (enhanced PDCCH, ePDCCH).
Below respectively from detecting resource granularity, position candidate (ePDCCH candidates) the pilot tone port of ePDCCH transmission, the detection method of some ePDCCH is introduced in the aspects such as transmission means.
In general, owing to not having the extra control information of information notification terminal after coded modulation will take how many transfer resources, therefore, base station and terminal can take that to arrange a basic resource allocation unit be the smallest allocation granularity, then further arrange several sizes that take resource, be generally the polymerization of one or more resource allocation units, the polymerization of N resource allocation unit is called the polymerization level n, base station can send with a kind of size wherein the control information after coded modulation, several resource size that terminal meeting blind Detecting is arranged again, also can be called several polymerization ranks that detect agreement.ECCE of basic resources unit of General Definition, the function class of eCCE and former CCE seemingly, can using the definition of early version CCE or slightly make an amendment at the second control area eCCE, also can newly define, can be fixing size (size) or variable size.
Then, control signal can define different polymerization ranks based on eCCE, such as polymerization 1,2,4,8, can be also 1,2,4 or 1,3,5,7 etc.So different polymerization ranks have just represented different resource size.Terminal is also just carried out these several polymerization ranks of blind Detecting more targetedly.
UE is detected for these candidates.To carry out blind Detecting one by one to candidates, need to first determine what pilot tone port is each eCCE resource that candidates comprises used carry out demodulation.At the second control signal transmission region, the proprietary demodulation pilot frequency (DMRS) that can reuse in R10 carrys out the demodulation control signal, well supports precoding technique.DMRS is also referred to as the proprietary demodulation pilot frequency of UE (UE Specific RS), and its Main Function is by control signal or data demodulates, the concrete demodulation that refers to descending control signaling information here.In early version, its demodulation mainly for data message designs, and the DMRS port (port) of 8 correspondences is arranged, and 8 layers of maximum supports, be respectively Port 7-14.The second control signal zone is generally only used 4 ports and is come for the demodulation control signal, is Port7-10.
The available resources of the second control signal district inclusion in Physical Resource Block RB, can be divided into a plurality of resource collections, and concrete point-score comprises multiple, as mode, time division way, code minute mode and some hybrid modes of frequency division.The corresponding relation that needs definition resource set (Resource set) and pilot tone port, the resource that could take according to eCCE when detecting belongs to which or which resource set, determines the pilot tone port used.
UE is when carrying out blind Detecting to ePDCCH, and the resource size taken in RB according to ePDCCH candidates is determined the relation of the pilot tone port of resource set and use, such as:
When 1resource set is occupied, the relation of the pilot tone port of resource set and use is as shown in table 2:
The relation of the pilot tone port of table 2 resource set and use
| Resource set 1 | Port a |
| Resource set 2 | Port b |
| Resource set 3 | Port c |
| Resource set 4 | Port d |
When 2resource set is occupied, the relation of the pilot tone port of resource set and use is as shown in table 3 or table 4:
The relation of the pilot tone port of table 3 resource set and use
| Resource set 1 | Port a |
| Resource set 2 | Port a |
| Resource set 3 | Port d |
| Resource set 4 | Port d |
The relation of the pilot tone port of table 4 resource set and use
| |
Port b |
| Resource set 2 | Port b |
| Resource set 3 | Port c |
| Resource set 4 | Port c |
When 4resource set is occupied, the relation of the pilot tone port of resource set and use is as shown in table 5:
The relation of the pilot tone port of table 5 resource set and use
The problem that prior art exists is: following ePDCCH candidates is example, each grid represents a resource set, if the polymerization rank (Aggregation Level, AL) that the needs of configuration detect comprises polymerization 1,2,4,8, wherein AL 1,2, the 4th, the transmission of centralized mapping (Localized), AL=8 is the transmission that disperses (Distributed).Under each polymerization rank, ePDCCH candidates comprises candidates as shown in Figure 2, when UE is detected ePDCCH canidates, due to in each RB, there will be need to be to the situation that port a～port d is estimated, the channel estimating number of times is more, can bring higher implementation complexity to terminal.
Summary of the invention
The embodiment of the present invention provides a kind of sending method of control signal, detection method, terminal and the base station of control signal, to solve the higher complexity issue that exists the channel estimating number of times too much to bring to terminal because of existing control channel detection technique.
The embodiment of the present invention provides a kind of sending method of control signal, and the method comprises:
Base station is terminal configuration control signal candidate transfer resource positional information, this control signal candidate transfer resource positional information comprises a plurality of polymerization level ns (1) ... N (n), and the position candidate of the transmission of the enhancement mode Physical Downlink Control Channel (ePDCCH) under each polymerization rank, n is greater than 1 integer;
Described base station selects running time-frequency resource position corresponding to one of them position candidate to send the configuration signal that carries described control signal candidate transfer resource positional information to described terminal in described candidate's control signal transfer resource position.
Preferably, described polymerization level n (1) ... the set of proprietary demodulation pilot frequency (DMRS) port that the position candidate under the lower arbitrary polymerization rank of N (n) is used in Resource Block (RB) is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
Preferably, described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
Preferably, two or three DMRS ports of DMRS port set-inclusion that the position candidate under described arbitrary polymerization rank is used in RB.
Preferably, during two of DMRS port set-inclusions that the position candidate under described arbitrary polymerization rank is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
The embodiment of the present invention also provides a kind of detection method of control signal, and the method comprises:
Terminal receives the configuration signal that carries control signal candidate transfer resource positional information that base station sends;
Described terminal is determined and is needed the polymerization level n (1) detected according to described configuration signal ... N (n), and the position candidate under each polymerization rank;
The DMRS port set that the position candidate under current polymerization level n (j) is used in this RB is determined in proprietary demodulation pilot frequency (DMRS) the port set that described terminal is used in Resource Block (RB) according to the position candidate under polymerization level n (i), wherein, i and j are the positive integer that is less than or equal to n, and not identical, n is greater than 1 integer; Perhaps,
Described polymerization level n (1) ... the DMRS port set that the position candidate under the lower arbitrary polymerization rank of N (n) is used in RB is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
Preferably, two or three DMRS ports of proprietary demodulation pilot frequency (DMRS) port set-inclusion that the position candidate under described polymerization level n (i) is used in Resource Block (RB).
Preferably, described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
Preferably, during two DMRS ports of DMRS port set-inclusion that the position candidate under described polymerization level n (i) is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
Preferably, after described terminal is determined the DMRS port set that the position candidate under current polymerization level n (j) is used in this RB or determined the DMRS port set of the position candidate use under described arbitrary polymerization rank, described method also comprises:
The high-level signaling that described terminal sends according to described base station is determined the DMRS port that the position candidate under current polymerization level n (j) is used in this RB.
Preferably, described method also comprises: the resource set that described terminal takies in RB according to the position candidate under polymerization level n (k) is determined the resource set that the position candidate under current polymerization level n (m) takies in this RB, wherein, and m<k<=4.
The embodiment of the present invention separately provides ，Gai base station, a kind of base station to comprise:
Configuration module, be used to terminal configuration control signal candidate transfer resource positional information, this control signal candidate transfer resource positional information comprises a plurality of polymerization level ns (1) ... N (n), and the position candidate of the transmission of the enhancement mode Physical Downlink Control Channel (ePDCCH) under each polymerization rank, n is greater than 1 integer;
Sending module, send for select running time-frequency resource position corresponding to one of them position candidate in described candidate's control signal transfer resource position the configuration signal that carries described control signal candidate transfer resource positional information to described terminal.
Preferably, described polymerization level n (1) ... the set of proprietary demodulation pilot frequency (DMRS) port that the position candidate under the lower arbitrary polymerization rank of N (n) is used in Resource Block (RB) is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
Preferably, described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
Preferably, two or three DMRS ports of DMRS port set-inclusion that the position candidate under described arbitrary polymerization rank is used in RB.
Preferably, during two of DMRS port set-inclusions that the position candidate under described arbitrary polymerization rank is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
The embodiment of the present invention provides again a kind of terminal, and this terminal comprises:
Receiver module, the configuration signal that carries control signal candidate transfer resource positional information sent for receiving base station;
Determination module, for determining and need the polymerization level n (1) detected according to described configuration signal ... N (n), and the position candidate under each polymerization rank; The DMRS port set that the position candidate under current polymerization level n (j) is used in this RB is determined in proprietary demodulation pilot frequency (DMRS) the port set of using in Resource Block (RB) according to the position candidate under polymerization level n (i), wherein, i and j are the positive integer that is less than or equal to n, and not identical, n is greater than 1 integer; Perhaps, described polymerization level n (1) ... the DMRS port set that the position candidate under the lower arbitrary polymerization rank of N (n) is used in RB is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
Preferably, two or three DMRS ports of proprietary demodulation pilot frequency (DMRS) port set-inclusion that the position candidate under described polymerization level n (i) is used in Resource Block (RB).
Preferably, described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
Preferably, during two DMRS ports of DMRS port set-inclusion that the position candidate under described polymerization level n (i) is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
Preferably, described determination module, also for: the high-level signaling sent according to described base station is determined the DMRS port that the position candidate under current polymerization level n (j) is used in this RB.
Preferably, described determination module, also for: the resource set taken in RB according to the position candidate under polymerization level n (k) is determined the resource set that the position candidate under current polymerization level n (m) takies in this RB, wherein, m<k<=4.
The embodiment of the present invention, by reusing port, make the interior port number occurred of each RB reduce, thereby reduce the channel estimating number of times, thereby reduced implementation complexity, and then reduced and detected delay.
The accompanying drawing explanation
Fig. 1 is the control signal area schematic of existing new and old edition;
Fig. 2 is the schematic diagram of the candidates that under existing each polymerization rank, ePDCCH candidates comprises;
Fig. 3 is the schematic diagram that the present invention determines the port embodiment mono-used under each polymerization rank;
Fig. 4 is the schematic diagram that the present invention determines the port embodiment bis-used under each polymerization rank;
Fig. 5 is the schematic diagram that the present invention determines the port embodiment tri-used under each polymerization rank;
Fig. 6 is the schematic diagram that the present invention determines the port embodiment tetra-used under each polymerization rank;
Fig. 7 is the schematic diagram that the present invention determines the port embodiment five used under each polymerization rank;
The structural representation that Fig. 8 is base station embodiment of the present invention;
The structural representation that Fig. 9 is terminal embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that do not conflict, the embodiment in the application and the feature in embodiment be combination in any mutually.
The embodiment of the present invention provides a kind of sending method of control signal, and this embodiment is described from base station side, and the method comprises:
Step 11, base station are terminal configuration control signal candidate transfer resource positional information, this control signal candidate transfer resource positional information comprises a plurality of polymerization level ns (1) ... N (n), and the position candidate of the transmission of the enhancement mode Physical Downlink Control Channel (ePDCCH) under each polymerization rank;
Wherein, described polymerization level n (1) ... the set of proprietary demodulation pilot frequency (DMRS) port that the position candidate under the lower arbitrary polymerization rank of N (n) is used in Resource Block (RB) is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n, and n is greater than 1 integer; Described polymerization level n (i) can be other 1 for polymer grade, polymerization rank 2, polymerization rank 4 or polymerization rank 8; Two or three DMRS ports of DMRS port set-inclusion that position candidate under described arbitrary polymerization rank is used in RB; During two of DMRS port set-inclusions that the position candidate under described arbitrary polymerization rank is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0;
Correspondingly, the embodiment of the present invention also provides a kind of detection method of control signal, and this embodiment is described from end side, and the method comprises:
Step 21, terminal receive the configuration signal that carries control signal candidate transfer resource positional information that base station sends;
Step 22, described terminal are determined and are needed the polymerization level n (1) detected according to described configuration signal ... N (n), and the position candidate under each polymerization rank;
The DMRS port set that the position candidate under current polymerization level n (j) is used in this RB is determined in proprietary demodulation pilot frequency (DMRS) the port set that step 23, described terminal are used in Resource Block (RB) according to the position candidate under polymerization level n (i), wherein, i and j are the positive integer that is less than or equal to n, and not identical, n is greater than 1 integer; Perhaps,
Described polymerization level n (1) ... the DMRS port set that the position candidate under the lower arbitrary polymerization rank of N (n) is used in RB is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
In addition, described method can also comprise: the resource set that terminal takies in RB according to the candidates under polymerization level n (k) is determined the resource set that the candidates under current polymerization level n (m) takies in this RB, wherein, and m<k<=4.
Below from the mutual angle of terminal and base station, technical scheme of the present invention is described in detail:
Embodiment mono-
Base station sends control signaling on the downlink transfer resource in the second control signal zone, the self adaptation of code check when base station has several Size that can select control signal to detect to carry out the control signal transmission while sending descending control signaling is respectively several different polymerization rank based on the eCCE definition:
Polymerization level n (1), polymerization level n (2), polymerization level n (3), polymerization level n (4), wherein N (1)-N (4) is integer.Common value is respectively 1,2, and 4,8.Here being not limited to this value, also being not limited to 4 kinds of polymerization ranks, can be also 2 kinds, 3 kinds of other situations such as polymerization rank.
Concerning base station and terminal, can arrange to exist following mapping relations:
If the candidates of ePDCCH takies 1 eCCE in RB, and this eCCE is corresponding to a resource set, determine with the relation table of DMRS port the DMRS port that each resource set is corresponding according to resource set now, the table 5 of take in background technology is the example explanation, but is not limited to the relation of this table description.Suppose a in table, b, c, d is respectively 7,9,8,10, can be also other values, as 7,8,9,10, take that the former describes for hypothesis here, and table 5 can be presented as the form of showing 5-1.
The relation of the pilot tone port of table 5-1 resource set and use
| | Port | 7 |
| Resource set 2 | |
|
| Resource set 3 | |
|
| |
|
If a resource set who takies is Resource1 wherein, it is fixed or the demodulation pilot frequency port that is configured to use is Port7, Resource2 wherein if, it is fixed or the demodulation pilot frequency port that is configured to use is Port9, Resource3 wherein if, it is fixed or the demodulation pilot frequency port that is configured to use is Port8, Resource4 wherein if, and it is fixed or the demodulation pilot frequency port that is configured to use is Port10; If the situation of configuration is that base station is configured by configuration signal.
If the candidates of ePDCCH takies 2 eCCE in RB, these two eCCE are corresponding to 2 resource sets, and the resource set when in background technology, 2resource set is occupied and DMRS port relation table 3 or table 4 are determined concrete DMRS port, suppose a, b, c, d is respectively 7,9,8,10, table 3 can be presented as the form of table 3-1, and table 4 can be presented as the form of table 4-1.
The relation of the pilot tone port of table 3-1 resource set and use
| | Port | 7 |
| Resource set 2 | |
|
| Resource set 3 | |
|
| |
|
The relation of the pilot tone port of table 4-1 resource set and use
| | Port | 9 |
| Resource set 2 | |
|
| Resource set 3 | |
|
| |
|
If the candidates of ePDCCH takies 4 eCCE in RB, these 4 eCCE are corresponding to 4 resource sets, and the DMRS ports set that the DMRS port that resource sets when 4resource set is occupied is corresponding can use according to the candidates under other polymerization ranks is determined; Or the DMRS ports used according to the candidates under other polymerization ranks set is determined in conjunction with high-rise configuration signal.
Can be by the complexity of the arrangement minimises channel estimating shown in Fig. 3, all there are 2 candidates in the candidates of 1 time ePDCCH of polymerization rank in each RB, comprise respectively Resourceset0 and 1, the DMRS port of use is a and b, respectively correspondence 7 and 9.
All there is a candidate in ePDCCH candidates under polymerization rank 2 in each RB, this candidate comprises the polymerization of Resource set0 and 1 in RB, two corresponding DMRS port of Resource sets, because the DMRS port set that the resource set that ePDCCH candidates during polymerization rank 1 takies is corresponding is port7 and 9, and, because needs meet the existence of subset relation, the DMRS port of use can only be port7or port 9; The high-level signaling that can issue according to base station is determined the concrete port7 of use or port9.
All there is 1 candidate in ePDCCH candidates under polymerization rank 4 in each RB, this candidates comprises 4 all Resource set in this RB, 4 corresponding DMRS port of Resource sets, the DMRS port set that the resource set that ePDCCH candidates during here due to polymerization rank 1 takies is corresponding is port7 and 9, therefore can be in port7 and port9, specifically by the 1bit signaling of base station, determine it is which port.This mode is equivalent to jointly determine according to the DMRS port of the 1bit signaling of base station and 1 use of polymerization rank.Also can fix the corresponding DMRS port of 4 Resource sets must be to belong to port7 and 8 set, gets like this common factor and can be defined as port7.
The polymerization rank has two kinds of situations for 8 times:
A kind of situation determines that with the situation that the polymerization rank accounts for 4 resource set for 4 times the method for pilot tone port is identical for the situation that accounts for 4 or 0 Resource set in RB;
Another situation is to have a candidate in RB, and the polymerization that comprises 2 resource set is the situation of the polymerization of resource set 0,1, and the pilot tone port of the situation that is 2 with the polymerization rank determines that method is identical.
In this embodiment, the DMRS port that under each polymerization rank, ePDCCH candidates is used is the subset that the ePDCCH candidates under polymerization rank 1 is used.
Embodiment bis-
Situation in embodiment mono-, can also be by the complexity of the arrangement minimises channel estimating shown in Fig. 4:
All there are 2 candidates in the candidates of 1 time ePDCCH of polymerization rank in each RB, comprises respectively Resource set2 and 3, and the DMRS port of use is a and b, respectively correspondence 8 and 10.
All there is a candidate in ePDCCH candidates under polymerization rank 2 in each RB, this candidate comprises the polymerization of Resource set2 and 3 in RB, two corresponding DMRS port of Resource sets, because the DMRS port set that the resource set that ePDCCH candidates during polymerization rank 1 takies is corresponding is port8 and 10, and, because needs meet the existence of subset relation, the DMRS port of use can only be port8or port 10; The high-level signaling that can issue according to base station is determined the concrete port8 of use or port10.
All there is 1 candidate in ePDCCH candidates under polymerization rank 4 in each RB, this candidates comprises 4 all Resource set in this RB, 4 corresponding DMRS port of Resource sets, the DMRS port set that the resource set that ePDCCH candidates during here due to polymerization rank 1 takies is corresponding is port8 and 10, therefore can be port8, in 10 one, specifically determine it is which port by the 1bit signaling of base station.This mode is equivalent to jointly determine according to the DMRS port of the 1bit signaling of base station and 1 use of polymerization rank.Also can fix the corresponding DMRS port of 4 Resource sets must be to belong to port7 and 8 set, gets like this common factor and can be defined as port8.
The polymerization rank has two kinds of situations for 8 times:
A kind of situation determines that with the situation that the polymerization rank accounts for 4 resource set for 4 times the method for pilot tone port is identical for the situation that accounts for 4 or 0 Resource set in RB.
Another situation is to have a candidate in RB, and the polymerization that comprises 2 resource set, be resource set2, the situation of 3 polymerization, and the pilot tone port of the situation that is 2 with the polymerization rank determines that method is identical.
In this embodiment, the DMRS port that under each polymerization rank, ePDCCH candidates is used is the subset that the ePDCCH candidates under polymerization rank 1 is used.
Embodiment tri-
Situation in embodiment mono-, can also be by the complexity of the arrangement minimises channel estimating shown in Fig. 5:
All there is 1 candidate in the candidates of 1 time ePDCCH of polymerization rank in each RB, comprises Resource set0, and the DMRS port of use is a, corresponding ports 7.
All there is a candidate in ePDCCH candidates under polymerization rank 2 in each RB, this candidate comprises the polymerization of Resource set0 and 1 in RB, two corresponding DMRS port of Resource sets, because the DMRS port set that the resource set that ePDCCH candidates during polymerization rank 1 takies is corresponding is port7, and, because needs meet the existence of subset relation, the DMRS port of use is port7.
All there is 1 candidate in ePDCCH candidates under polymerization rank 4 in each RB, this candidates comprises 4 all Resource set in this RB, 4 corresponding DMRS port of Resource sets, the DMRS port set that the resource set that ePDCCH candidates during here due to polymerization rank 1 takies is corresponding is port7, and therefore determining the corresponding DMRS port of 4 Resource sets is also port7.
The polymerization rank has two kinds of situations for 8 times:
A kind of situation determines that with the situation that the polymerization rank accounts for 4 resource set for 4 times the method for pilot tone port is identical for the situation that accounts for 4 or 0 Resource set in RB.
Another situation is to have a candidate in RB, and the polymerization that comprises 2 resource set is the situation of the polymerization of resource set 0,1, and the pilot tone port of the situation that is 2 with the polymerization rank determines that method is identical.
In this embodiment, the DMRS port that under each polymerization rank, ePDCCH candidates is used is all identical, is port7.
Embodiment tetra-
Situation in embodiment mono-, can also be by the complexity of the arrangement minimises channel estimating shown in Fig. 6:
All there is 1 candidate in the candidates of 1 time ePDCCH of polymerization rank in each RB, comprises Resource set1, and the DMRS port of use is b, corresponding port9.
All there is a candidate in ePDCCH candidates under polymerization rank 2 in each RB, this candidate comprises the polymerization of Resource set0 and 1 in RB, two corresponding DMRS port of Resource sets, because the DMRS port set that the resource sets that ePDCCH candidates during polymerization rank 1 takies is corresponding is port9, and, because needs meet the existence of subset relation, the DMRS port of use is port9.
All there is 1 candidate in ePDCCH candidates under polymerization rank 4 in each RB, this candidates comprises 4 all Resource sets in this RB, 4 corresponding DMRS port of Resource sets, the DMRS port set that the resource set that ePDCCH candidates during here due to polymerization rank 1 takies is corresponding is port9, therefore determines that the corresponding DMRS port of 4 Resource sets is also port9.
The polymerization rank has two kinds of situations for 8 times:
A kind of situation determines that with the situation that the polymerization rank accounts for 4 resource sets for 4 times the method for pilot tone port is identical for the situation that accounts for 4 or 0 Resource sets in RB.
Another situation is to have a candidate in RB, and the polymerization that comprises 2 resource sets is the situation of the polymerization of resource set 0,1, and the pilot tone port of the situation that is 2 with the polymerization rank determines that method is identical.
In this embodiment, the DMRS port that under each polymerization rank, ePDCCH candidates is used is all identical, is port9.
Embodiment five
Situation in embodiment mono-, can be by the complexity of the arrangement minimises channel estimating shown in Fig. 6:
All there is 1 candidate in the candidates of 1 time ePDCCH of polymerization rank in each RB, comprises Resource set2, and the DMRS port of use is c, corresponding port8.
All there is a candidate in ePDCCH candidates under polymerization rank 2 in each RB, this candidate comprises the polymerization of Resource set2 and 3 in RB, two corresponding DMRS port of Resource sets, because the DMRS port set that the resource set that ePDCCH candidates during polymerization rank 4 takies is corresponding is port8 and 10, and because needs meet the existence of subset relation, the DMRS port used is port8or10, can configure and determine by high-level signaling.
All there are 2 candidates in ePDCCH candidates under polymerization rank 4 in each RB, these 2 candidates respectively comprise a Resource set in this RB, for resource set2 and 3, each corresponding DMRS port of these two Resource sets, be respectively port8 and port10.
The polymerization rank has two kinds of situations for 8 times:
A kind of situation is for to account for 4 resource set for 4 times in the situation that account for situation and the polymerization rank of 4 or 0 Resource set in RB, the set of the DMRS ports used according to the candidates under polymerization rank 4, can determine that the DMRS port of its use, for one in port8 and 10, can be configured.
Another situation is to have a candidate in RB, and the polymerization that comprises 2 resource sets is the situation of the polymerization of resource set 2,3, and the pilot tone port of the situation that is 2 with the polymerization rank determines that method is identical.
In this embodiment, the DMRS port set that under each polymerization rank, ePDCCH candidates is used is the subset of the DMRS ports set of using in the situation of polymerization rank 4.
The embodiment of the present invention, by reusing port, make the interior port number occurred of each RB reduce, thereby reduce the channel estimating number of times, thereby reduced implementation complexity, and then reduced and detected delay.
As shown in Figure 8, be the structural representation of base station embodiment of the present invention, this base station comprises configuration module 81 and sending module 82, wherein:
Configuration module, be used to terminal configuration control signal candidate transfer resource positional information, this control signal candidate transfer resource positional information comprises a plurality of polymerization level ns (1) ... N (n), and the position candidate of the transmission of the enhancement mode Physical Downlink Control Channel (ePDCCH) under each polymerization rank, n is greater than 1 integer;
Sending module, send for select running time-frequency resource position corresponding to one of them position candidate in described candidate's control signal transfer resource position the configuration signal that carries described control signal candidate transfer resource positional information to described terminal.
Described polymerization level n (1) ... the set of proprietary demodulation pilot frequency (DMRS) port that the position candidate under the lower arbitrary polymerization rank of N (n) is used in Resource Block (RB) is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
Wherein, described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
In addition, two or three DMRS ports of DMRS port set-inclusion that the position candidate under described arbitrary polymerization rank is used in RB; During two of DMRS port set-inclusions that the position candidate under described arbitrary polymerization rank is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
Above-mentioned base station, by terminal, sending configuration signal, make terminal can reuse port, thereby make the port number occurred in each RB reduce, and reduces the channel estimating number of times.
As shown in Figure 9, be the structural representation of terminal embodiment of the present invention, this terminal comprises receiver module 91 and determination module 92, wherein:
Receiver module, the configuration signal that carries control signal candidate transfer resource positional information sent for receiving base station;
Determination module, for determining and need the polymerization level n (1) detected according to described configuration signal ... N (n), and the position candidate under each polymerization rank; The DMRS port set that the position candidate under current polymerization level n (j) is used in this RB is determined in proprietary demodulation pilot frequency (DMRS) the port set of using in Resource Block (RB) according to the position candidate under polymerization level n (i), wherein, i and j are the positive integer that is less than or equal to n, and not identical, n is greater than 1 integer; Perhaps, described polymerization level n (1) ... the DMRS port set that the position candidate under the lower arbitrary polymerization rank of N (n) is used in RB is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
Wherein, two or three DMRS ports of proprietary demodulation pilot frequency (DMRS) port set-inclusion that the position candidate under described polymerization level n (i) is used in Resource Block (RB); During two DMRS ports of DMRS port set-inclusion that the position candidate under described polymerization level n (i) is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.Described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8, etc.
In addition, described determination module, also for: the high-level signaling sent according to described base station is determined the DMRS port that the candidates under current polymerization level n (j) is used in this RB.
Further, described determination module, also for: the resource set taken in RB according to the candidates under polymerization level n (k) is determined the resource set that the candidates under current polymerization level n (m) takies in this RB, wherein, m<k<=4.
Above-mentioned terminal, by reusing port, make the interior port number occurred of each RB reduce, thereby reduce the channel estimating number of times, thereby reduced implementation complexity, and then reduced and detected delay.
One of ordinary skill in the art will appreciate that all or part of step in said method can come the instruction related hardware to complete by program, said procedure can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
Above embodiment is only unrestricted in order to technical scheme of the present invention to be described, only with reference to preferred embodiment, the present invention is had been described in detail.Those of ordinary skill in the art should be appreciated that and can modify or be equal to replacement technical scheme of the present invention, and do not break away from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of claim scope of the present invention.
Claims (22)
1. the sending method of a control signal, is characterized in that, the method comprises:
Base station is terminal configuration control signal candidate transfer resource positional information, this control signal candidate transfer resource positional information comprises a plurality of polymerization level ns (1) ... N (n), and the position candidate of the transmission of the enhancement mode Physical Downlink Control Channel (ePDCCH) under each polymerization rank, n is greater than 1 integer;
Described base station selects running time-frequency resource position corresponding to one of them position candidate to send the configuration signal that carries described control signal candidate transfer resource positional information to described terminal in described candidate's control signal transfer resource position.
2. method according to claim 1 is characterized in that:
Described polymerization level n (1) ... the set of proprietary demodulation pilot frequency (DMRS) port that the position candidate under the lower arbitrary polymerization rank of N (n) is used in Resource Block (RB) is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
3. method according to claim 2 is characterized in that:
Described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
4. method according to claim 2 is characterized in that:
Two or three DMRS ports of DMRS port set-inclusion that position candidate under described arbitrary polymerization rank is used in RB.
5. method according to claim 4 is characterized in that:
During two of DMRS port set-inclusions that the position candidate under described arbitrary polymerization rank is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
6. the detection method of a control signal, is characterized in that, the method comprises:
Terminal receives the configuration signal that carries control signal candidate transfer resource positional information that base station sends;
Described terminal is determined and is needed the polymerization level n (1) detected according to described configuration signal ... N (n), and the position candidate under each polymerization rank;
The DMRS port set that the position candidate under current polymerization level n (j) is used in this RB is determined in proprietary demodulation pilot frequency (DMRS) the port set that described terminal is used in Resource Block (RB) according to the position candidate under polymerization level n (i), wherein, i and j are the positive integer that is less than or equal to n, and not identical, n is greater than 1 integer; Perhaps,
Described polymerization level n (1) ... the DMRS port set that the position candidate under the lower arbitrary polymerization rank of N (n) is used in RB is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
7. method according to claim 6 is characterized in that:
Two or three DMRS ports of DMRS port set-inclusion that position candidate under described polymerization level n (i) is used in RB.
8. method according to claim 6 is characterized in that:
Described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
9. method according to claim 7 is characterized in that:
During two DMRS ports of DMRS port set-inclusion that the position candidate under described polymerization level n (i) is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
10. method according to claim 6 is characterized in that:
After described terminal is determined the DMRS port set that the position candidate under current polymerization level n (j) is used in this RB or determined the DMRS port set of the position candidate use under described arbitrary polymerization rank, described method also comprises:
The high-level signaling that described terminal sends according to described base station is determined the DMRS port that the position candidate under current polymerization level n (j) is used in this RB.
11. according to the described method of the arbitrary claim of claim 6-10, it is characterized in that, described method also comprises:
The resource set that described terminal takies in RB according to the position candidate under polymerization level n (k) is determined the resource set that the position candidate under current polymerization level n (m) takies in this RB, wherein, and m<k<=4.
12. a base station, is characterized in that, this base station comprises:
Configuration module, be used to terminal configuration control signal candidate transfer resource positional information, this control signal candidate transfer resource positional information comprises a plurality of polymerization level ns (1) ... N (n), and the position candidate of the transmission of the enhancement mode Physical Downlink Control Channel (ePDCCH) under each polymerization rank, n is greater than 1 integer;
Sending module, send for select running time-frequency resource position corresponding to one of them position candidate in described candidate's control signal transfer resource position the configuration signal that carries described control signal candidate transfer resource positional information to described terminal.
13. base station according to claim 12 is characterized in that:
Described polymerization level n (1) ... the set of proprietary demodulation pilot frequency (DMRS) port that the position candidate under the lower arbitrary polymerization rank of N (n) is used in Resource Block (RB) is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
14. base station according to claim 13 is characterized in that:
Described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
15. base station according to claim 13 is characterized in that:
Two or three DMRS ports of DMRS port set-inclusion that position candidate under described arbitrary polymerization rank is used in RB.
16. base station according to claim 15 is characterized in that:
During two of DMRS port set-inclusions that the position candidate under described arbitrary polymerization rank is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
17. a terminal, is characterized in that, this terminal comprises:
Receiver module, the configuration signal that carries control signal candidate transfer resource positional information sent for receiving base station;
Determination module, for determining and need the polymerization level n (1) detected according to described configuration signal ... N (n), and the position candidate under each polymerization rank; The DMRS port set that the position candidate under current polymerization level n (j) is used in this RB is determined in proprietary demodulation pilot frequency (DMRS) the port set of using in Resource Block (RB) according to the position candidate under polymerization level n (i), wherein, i and j are the positive integer that is less than or equal to n, and not identical, n is greater than 1 integer; Perhaps, described polymerization level n (1) ... the DMRS port set that the position candidate under the lower arbitrary polymerization rank of N (n) is used in RB is the subset of the DMRS port set of the position candidate use under N in this RB (i), wherein, i is the positive integer that is less than or equal to n.
18. terminal according to claim 17 is characterized in that:
Two or three DMRS ports of DMRS port set-inclusion that position candidate under described polymerization level n (i) is used in RB.
19. terminal according to claim 17 is characterized in that:
Described polymerization level n (i) is polymerization rank 1, polymerization rank 2, polymerization rank 4 or polymerization rank 8.
20. terminal according to claim 18 is characterized in that:
During two DMRS ports of DMRS port set-inclusion that the position candidate under described polymerization level n (i) is used in RB, this two DMRS port-for-ports 7 and port 9, or, be port 8 and port one 0.
21. terminal according to claim 17 is characterized in that:
Described determination module, also for: the high-level signaling sent according to described base station is determined the DMRS port that the position candidate under current polymerization level n (j) is used in this RB.
22., according to the described terminal of the arbitrary claim of claim 17-21, it is characterized in that:
Described determination module, also for: the resource set taken in RB according to the position candidate under polymerization level n (k) is determined the resource set that the position candidate under current polymerization level n (m) takies in this RB, wherein, m<k<=4.
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