CN103378885A - Method for transmitting downlink data, method for receiving downlink data, and apparatus - Google Patents
Method for transmitting downlink data, method for receiving downlink data, and apparatus Download PDFInfo
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- CN103378885A CN103378885A CN2012101128728A CN201210112872A CN103378885A CN 103378885 A CN103378885 A CN 103378885A CN 2012101128728 A CN2012101128728 A CN 2012101128728A CN 201210112872 A CN201210112872 A CN 201210112872A CN 103378885 A CN103378885 A CN 103378885A
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Abstract
Embodiments of the present invention provide a method for transmitting downlink data, a method for receiving downlink data, and apparatuses. The methods and the apparatuses relate to the technical field of communications and are invented for effectively improving performance of PDSCH (physical downlink shared channel) estimation. The method for transmitting downlink data comprises determining the downlink data needed to be transmitted to user equipment, the downlink data including an enhanced- physical downlink control channel (E-PDCCH) and a PDSCH; performing physical resource mapping of the downlink data to map the E-PDCCH and the PDSCH on different physical resource blocks (RB) of the same pre-coding resource block groups (PRG); performing pre-coding processing on the mapped downlink data, wherein a pilot frequency port of the E-PDCCH and at least one pilot frequency port of the PDSCH use the same pre-coding matrix for pre-coding processing; and transmitting the downlink data after the pre-coding processing to the user equipment. The methods and the apparatuses can be applied to wireless communication technology.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of sending, receiving method and device of downlink data.
Background technology
According to LTE Release 8/9/10 standard, a normal descending sub frame, include two time slots (slot), each time slot has 7 orthogonal frequency division multiplex OFDMs (Orthogonal Frequency Division Multiplexing) symbol, and a normal descending sub frame contains 14 or 12 OFDM symbols altogether; A Physical Resource Block RB (Resource Block) comprises 12 subcarriers at frequency domain, be half subframe duration (time slot) in time domain, namely comprise 7 or 6 OFDM symbols, wherein, normal CP (Cyclic Prefix, Cyclic Prefix) length is 7 OFDM symbols, and the CP length of expansion is 6 OFDM symbols.Certain subcarrier in certain OFDM symbol is called RE (Resource Element, resource element), and therefore a RB comprises 84 or 72 RE.On a subframe, a pair of RB of two time slots is referred to as Resource Block pair, and namely RB is to (RB pair).
In Long Term Evolution LTE before version 10 and version 10 (the Long Term Evolution) system, physical downlink control channel PDCCH (Physical Downlink Control Channel) and Physical Downlink Shared Channel PDSCH (Physical Downlink Shared Channel) are the time-divisions in a subframe, and PDCCH is carried in front n the symbol of a subframe.In the LTE system after version 10, the introducing of the technology such as multi-user's multiple-input, multiple-output MIMO (Multiple Input Multiple Output) and coordinate multipoint sending and receiving CoMP (Coordinated Multiple Point Transmission And Reception) is so that the control channel capacity is limited, therefore introduced the PDCCH that transmits based on MIMO precoding mode, the Physical Downlink Control Channel E-PDCCH (Enhanced Physical Downlink Control Channel) that namely strengthens.E-PDCCH is not in the control area of front n symbol of a subframe but in the zone of the transmitting downlink data of this subframe, and with PDSCH be frequency division, can take different RB pair from PDSCH.
For certain user equipment (UE) (User Equipment), the E-PDCCH that sends to this UE when the base station and the different RBs of PDSCH on same precoding Resource Block group PRG (Precoding Resource Group) are when upper, when UE carries out channel estimating to PDSCH, can only use PDSCH place RB that upper pilot tone is carried out channel estimating, cause the poor-performing of channel estimating.
Summary of the invention
The main purpose of embodiments of the invention is, a kind of sending, receiving method and device of downlink data is provided, performance that can Effective Raise PDSCH channel estimating.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of sending method of downlink data comprises:
Definite needs are transferred to the downlink data of UE, and described downlink data comprises E-PDCCH and PDSCH;
Carry out the physical resource mapping of described downlink data, so that described E-PDCCH is mapped in the different physics RB of same PRG to upper with PDSCH;
Downlink data after the described mapping is carried out precoding processing, and wherein, at least one pilot tone port of the pilot tone port of described E-PDCCH and described PDSCH uses same pre-coding matrix to carry out precoding processing;
Send downlink data after the described precoding processing to described UE.
A kind of method of reseptance of downlink data comprises:
UE receives the downlink data that the base station sends, described downlink data comprises that the base station sends to E-PDCCH and the PDSCH of described UE, described E-PDCCH and PDSCH by described base station maps the different physics RB of same PRG on, and described base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing;
Described UE carries out blind Detecting to the downlink data of described reception, to obtain described E-PDCCH;
Described UE obtains described PDSCH according to the described E-PDCCH that obtains from the downlink data of described reception.
A kind of base station comprises:
Determining unit, definite downlink data that need to be transferred to UE, described downlink data comprises E-PDCCH and PDSCH;
Map unit is used for carrying out the physical resource mapping of the definite described downlink data of determining unit, so that described E-PDCCH is mapped in the different physics RB of same PRG to upper with PDSCH;
Precoding unit is used for the downlink data after the described map unit mapping is carried out precoding processing, and wherein, at least one pilot tone port of the pilot tone port of described E-PDCCH and described PDSCH uses same pre-coding matrix to carry out precoding processing;
Transmitting element is used for sending downlink data after the described precoding unit precoding processing to described UE.
A kind of UE comprises:
Receiving element, be used for receiving the downlink data that the base station sends, described downlink data comprises that the base station sends to E-PDCCH and the PDSCH of described UE, described E-PDCCH and PDSCH by described base station maps the different physics RB of same PRG on, and described base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing;
The blind Detecting unit is used for the downlink data that described receiving element receives is carried out blind Detecting, to obtain described E-PDCCH;
Acquiring unit for the E-PDCCH that obtains according to described blind Detecting unit, obtains described PDSCH from the downlink data that described receiving element receives.
The sending, receiving method of the downlink data that the embodiment of the invention provides, base station and UE, the different RB that the E-PDCCH that the base station sends to UE and PDSCH are mapped in same PRG is to upper, because the same pre-coding matrix of the pilot tone port of described E-PDCCH and at least one pilot tone port use of described PDSCH has carried out precoding processing.Therefore when PDSCH being carried out channel estimating, can utilize the pilot tone port of E-PDCCH to carry out joint channel estimation, Effective Raise the performance of channel estimating.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of schematic flow sheet of the sending method of the downlink data that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is mapping mode schematic diagram in the method shown in Figure 1;
Fig. 3 (a) is 1 o'clock for the polymerization rank, and RB is to the corresponding relation of the logic control element of interior pilot tone port and E-PDCCH;
Fig. 3 (b) is 2 o'clock for the polymerization rank, and RB is to the corresponding relation of the logic control element of interior pilot tone port and E-PDCCH;
Fig. 4 be PDSCH at a RB to interior pilot tone port pattern schematic diagram;
A kind of schematic flow sheet of the method for reseptance of the downlink data that Fig. 5 provides for the embodiment of the invention;
A kind of structured flowchart of the base station that Fig. 6 provides for the embodiment of the invention;
A kind of structured flowchart of the UE that Fig. 7 provides for the embodiment of the invention;
A kind of structured flowchart of the UE that Fig. 8 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.In the present invention, suppose that E-PDCCH is individual layer (order 1) transmission.
The embodiment of the invention provides a kind of sending method of downlink data, as shown in Figure 1, may further comprise the steps:
Step 11, the downlink data of UE is determined to be transferred in the base station, and described downlink data comprises E-PDCCH and PDSCH.
In this step, E-PDCCH is the control information that the base station sends to UE, and PDSCH is the business information that the base station sends to UE.The specific implementation of this step sees also prior art, and the present invention does not do restriction.
In the system of LTE version 10, the RB in each PRG is determined by system bandwidth that to number in the embodiment of the invention, the corresponding relation of system bandwidth and PRG can be referring to table 1.For example, when system bandwidth be 25 RB to the time, referring to table 1, each PRG comprises 2 RB pair.Need to prove that because the definition of PRG of E-PDCCH is uncertain in the existing standards and norms, embodiments of the invention are take table 1 as example, but are not limited to table 1.
Table 1
| System bandwidth (physics RB) | PRG size (RB to) |
| ≤10 | 1 |
| 11-26 | 2 |
| 27-63 | 3 |
| 64-110 | 2 |
Through after this step, the E-PDCCH that the base station will send to UE is mapped to one or several RB among certain PRG to upper, simultaneously, the RB that is not occupied by the E-PDCCH of this UE of this PRG on, dispatched the PDSCH of this UE, namely PDSCH is mapped in this PRG not the RB that occupied by E-PDCCH to upper.Illustrate, as shown in Figure 2, the size of PRG is 2 RB pair, and in this step, the E-PDCCH that the base station will send to UE is mapped in and is numbered 0 RB among the PRG0 to upper, and the PDSCH that the base station sends to UE is mapped in and is numbered 1 RB among the PRG0 to upper.
In this step, the base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing, thereby so that UE when PDSCH is carried out channel estimating, can utilize the pilot tone port of E-PDCCH to carry out joint channel estimation.
Known, each E-PDCCH is comprised of the logic control element that one or several is similar to the control channel Elements C CE (Control Channel Element) of PDCCH, this logic control element is defined as eCCE herein, namely each E-PDCCH is comprised of one or several eCCE.E-PDCCH can continue to use the polymerization rank AG (Aggregation Level) among the PDCCH, be that E-PDCCH has 1,2,4,8 four kind of polymerization rank, the polymerization class value of the E-PDCCH that the number that need to be transferred to the eCCE that the E-PDCCH of UE comprises and described UE are corresponding is identical, be that the polymerization rank is the E-PDCCH of n, an E-PDCCH comprises n eCCE.To interior, four DMRS (Demodulation Reference Signal, demodulated reference signal) pilot tone port (port) is arranged at most at a RB, be respectively port 7,8,9,10.For a UE, E-PDCCH is individual layer transmission, and demodulation pilot frequency port and eCCE that E-PDCCH uses have binding relationship, and so-called binding relationship refers to, the corresponding definite pilot tone port of each eCCE.Illustrate, if the polymerization rank AG of E-PDCCH is 1, shown in Fig. 3 (a), when a RB centering has 4 eCCE, because the polymerization rank AG of E-PDCCH is 1, namely an E-PDCCH comprises 1 eCCE, and 4 eCCE of this RB centering belong to respectively 4 E-PDCCH, respectively with pilot tone port 7,8,9,10 bindings.And if the polymerization rank AG of E-PDCCH is 2, shown in Fig. 3 (b), when a RB centering had 4 eCCE, because the polymerization rank AG of E-PDCCH is 2, namely an E-PDCCH comprised 2 eCCE, among right 4 eCCE of this RB, per 2 belong to an E-PDCCH, and eCCE0 and eCCE1 belong to 1 E-PDCCH, with 7 bindings of pilot tone port, and eCCE2 and eCCE3 belong to another E-PDCCH, with 9 bindings of pilot tone port.
In the system of LTE version 10, the specific reference signals DMRS that has introduced UE comes PDSCH is carried out channel estimating, and the antenna end slogan that 8 DMRS are arranged at most is 7,8,9,10,11,12,13,14.Can be as shown in Figure 4 to the pilot tone port pattern of interior DMRS at a RB, wherein, the pilot tone port of DMRS is in time- domain symbol 5,6, and on 12,13, and each port distribution is on different running time-frequency resources.
Figure 2 shows that example, the E-PDCCH that the base station will send to UE is mapped in and is numbered 0 RB among the PRG0 to upper, the PDSCH that sends to UE is mapped in is numbered 1 RB among the PRG0 to upper.Suppose that E-PDCCH uses 9 demodulation of DMRS port, and PDSCH is two-layer transmission, UE uses DMRS pilot tone port 7 and 8 couples of PDSCH to carry out channel estimating.Can only use for fear of UE and to be numbered 1 the right pilot tone of RB PDSCH is carried out channel estimating, in this step, at the base station end, can use same pre-coding matrix to carry out precoding processing to the pilot tone port 9 of E-PDDCH and the pilot tone port 7 of PDSCH, perhaps, can use same pre-coding matrix to carry out precoding processing to the pilot tone port 9 of E-PDDCH and the pilot tone port 8 of PDSCH, certainly, can also use same pre-coding matrix to carry out precoding processing to the pilot tone port 9 of E-PDDCH and the pilot tone port 7 and 8 of PDSCH.Thereby, when UE carries out channel estimating to PDSCH, can utilize the pilot tone port of E-PDCCH to carry out joint channel estimation.
Again for example, suppose that E-PDCCH uses 9 demodulation of DMRS port, and PDSCH is the individual layer transmission, UE uses 7 couples of PDSCH of DMRS pilot tone port to carry out channel estimating.Can only use for fear of UE and to be numbered 1 the right pilot tone of RB PDSCH is carried out channel estimating, in this step, at the base station end, can use same pre-coding matrix to carry out precoding processing to the pilot tone port 9 of E-PDDCH and the pilot tone port 7 of PDSCH, thereby, when UE carries out channel estimating to PDSCH, can utilize the pilot tone port of E-PDCCH to carry out joint channel estimation.
In order effectively to guarantee the accuracy of joint channel estimation, preferably, it is fixing to use same pre-coding matrix to carry out the power proportions relation of at least one pilot tone port of the pilot tone port of described E-PDCCH of precoding processing and described PDSCH, to be more conducive to the joint channel estimation of UE.For example, when the base station uses same pre-coding matrix to carry out precoding processing to the pilot tone port 7 of the pilot tone port 9 of E-PDDCH and PDSCH, the pilot power of the pilot tone port 9 of E-PDDCH and the pilot tone port 7 of PDSCH is the same, or the pilot power of the pilot tone port 9 of E-PDDCH is twices of the pilot power on the pilot tone port 7 of PDSCH.
Need to prove, the power proportions relation of using same pre-coding matrix to carry out at least one pilot tone port of the pilot tone port of described E-PDCCH of precoding processing and described PDSCH needs base station and UE to know altogether, it can be pre-set to base station and UE, also can be the base station determine in real time and notice to UE.
Also need to prove, in order further to guarantee the performance of PDSCH channel estimating, concrete, in this step, when only the PDSCH in described downlink data was order 1 transmission in the base station, when namely described PDSCH only had a pilot tone port, the pre-coding matrix same to pilot tone port and the pilot tone port use of described PDSCH of described E-PDCCH carried out precoding processing, in other situations, can adopt prior art.
Further, in this step, thereby realize that for the ease of precoding processing the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH use same pre-coding matrix to carry out precoding processing, concrete optional, the base station can use same pre-coding matrix to the pilot tone port of described E-PDCCH, at least one pilot tone port of described PDSCH, the data of described E-PDCCH and the data of described PDSCH are carried out precoding processing, namely be not only the pilot tone port, the data of E-PDCCH also use identical pre-coding matrix to carry out precoding processing with the data of PDSCH.Further alternative, the base station can also use same pre-coding matrix that the data of the layer corresponding with described at least one pilot tone port of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH are carried out precoding processing.
Concrete, because in the prior art, during the transmission of PDSCH one deck, PDSCH pilot tone port is 7; When PDSCH was two-layer transmission, PDSCH pilot tone port was 7,8; When PDSCH was three layers of transmission, PDSCH pilot tone port was 7,8,9; When PDSCH was 4 layers of transmission, PDSCH pilot tone port was 7,8,9,10; When PDSCH was 5 layers of transmission, PDSCH pilot tone port was 7,8,9,10,11; When PDSCH was 6 layers of transmission, PDSCH pilot tone port was 7,8,9,10,11,12; When PDSCH was 7 layers of transmission, PDSCH pilot tone port was 7,8,9,10,11,12,13; When PDSCH was 8 layers of transmission, PDSCH pilot tone port was 7,8,9,10,11,12,13,14.And E-PDCCH only is one deck transmission.Because the pilot tone port 7 of PDSCH always exists, can make port 7 bindings of pilot tone port and the PDSCH of E-PDDCH, be that pilot tone port 7 in the PRG at place among the pilot tone port x (such as port 9) of E-PDDCH and the PDSCH uses same pre-coding matrix to carry out precoding, that is comprise the pilot tone port 7 of described PDSCH with the pilot tone port that the pilot tone port of described E-PDCCH uses same pre-coding matrix to carry out the described PDSCH of precoding processing.
Step 14, the base station sends downlink data after the described precoding processing to described UE.
The sending method of the downlink data that the embodiment of the invention provides, the E-PDCCH that the base station sends to UE is mapped in the different RB of same PRG to upper with PDSCH, because at least one pilot tone port of the pilot tone port of described E-PDCCH and described PDSCH uses same pre-coding matrix to carry out precoding processing, when therefore UE carries out channel estimating to PDSCH, can utilize the pilot tone port of E-PDCCH to carry out joint channel estimation, Effective Raise the performance of channel estimating.
Corresponding with aforementioned method of reseptance, as shown in Figure 5, the embodiment of the invention also provides a kind of method of reseptance of downlink data, may further comprise the steps:
Step 21, UE receives the downlink data that the base station sends, described downlink data comprises that the base station sends to E-PDCCH and the PDSCH of described UE, described E-PDCCH and PDSCH by described base station maps the different physics RB of same PRG on, and described base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing.
Step 22, UE carries out blind Detecting to the downlink data of described reception, to obtain described E-PDCCH.
Step 23, UE obtains described PDSCH according to the described E-PDCCH that obtains from the downlink data of described reception.
The method of reseptance of the downlink data that the embodiment of the invention provides, the E-PDCCH that the base station sends to UE is mapped in the different RB of same PRG to upper with PDSCH, because at least one pilot tone port of the pilot tone port of described E-PDCCH and described PDSCH uses same pre-coding matrix to carry out precoding processing, when UE carries out channel estimating to PDSCH, can utilize the pilot tone port of E-PDCCH to carry out joint channel estimation, Effective Raise the performance of channel estimating.
In one embodiment of the invention, in the downlink data that UE receives, the same pre-coding matrix of described use carries out the pilot tone port of the described E-PDCCH of precoding processing to be fixed with the power proportions relation of at least one pilot tone port of described PDSCH.Need to prove that this power proportions relation is in common knowledge by base station and UE.
In one embodiment of the invention, PDSCH in the described downlink data is order 1 transmission, when namely only the PDSCH in described downlink data is order 1 transmission, be described PDSCH when a pilot tone port is only arranged, described base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and the pilot tone port of described PDSCH are carried out precoding processing.
Concrete, in one embodiment of the invention, described base station uses same pre-coding matrix that the data of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH have been carried out precoding processing.
Concrete, in one embodiment of the invention, described base station uses same pre-coding matrix that the data of the layer corresponding with described at least one pilot tone port of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH are carried out precoding processing.
In one embodiment of the invention, the pilot tone port that uses same pre-coding matrix to carry out the described PDSCH of precoding processing with the pilot tone port of described E-PDCCH comprises the pilot tone port 7 of described PDSCH.
Further, in one embodiment of the invention, after step 23, described method of reseptance also comprises:
UE uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing according to described base station, and the RB shared to described PDSCH carries out channel estimating to upper channel.
After UE receives E-PDCCH and PDSCH, the UE known base station uses the pilot tone port of same E-PDCCH and one or several pilot tone port of PDSCH to carry out precoding processing, therefore, UE will use the pilot tone port of same E-PDCCH and one or several pilot tone port of PDSCH to carry out precoding processing and carry out the shared RB of PDSCH to upper channel estimating according to the base station.
Better, UE will use according at least one the pilot tone port with described PDSCH same pre-coding matrix to carry out the pilot tone port of described E-PDCCH of precoding processing and the pilot tone port of described PDSCH, and the RB shared to PDSCH carries out joint channel estimation to upper channel.
Embodiment is corresponding with preceding method, and the embodiment of the invention provides again a kind of base station, as shown in Figure 6, comprising:
Determining unit 101, definite downlink data that need to be transferred to UE, described downlink data comprises E-PDCCH and PDSCH;
Transmitting element 104 is for the downlink data after described UE transmission precoding unit 103 precoding processing.
The base station that the embodiment of the invention provides, the E-PDCCH that sends to UE is mapped in the different RB of same PRG to upper with PDSCH, use same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH have been carried out precoding processing, when therefore UE carries out channel estimating to PDSCH, can utilize the pilot tone port of E-PDCCH to carry out joint channel estimation, Effective Raise the performance of channel estimating.
In one embodiment of the invention, the precoding unit 103 pilot tone port that uses same pre-coding matrix to carry out the described E-PDCCH of precoding processing is fixed with the power proportions relation of at least one pilot tone port of described PDSCH.
Optionally, in an embodiment of the present invention, PDSCH in the described downlink data is order 1 transmission, when namely only the PDSCH in described downlink data is order 1 transmission, be described PDSCH when a pilot tone port is only arranged, precoding unit 103 uses same pre-coding matrix that the pilot tone port of described E-PDCCH and the pilot tone port of described PDSCH are carried out precoding processing.
Further, in an embodiment of the present invention, precoding unit 103 is concrete for using same pre-coding matrix that the data of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, described E-PDCCH and the data of described PDSCH are carried out precoding processing.
Further, in an embodiment of the present invention, precoding unit 103 is concrete for using same pre-coding matrix that the data of the layer corresponding with described at least one pilot tone port of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH are carried out precoding processing.
Concrete, in an embodiment of the present invention, the pilot tone port that uses same pre-coding matrix to carry out the described PDSCH of precoding processing with the pilot tone port of described E-PDCCH comprises the pilot tone port 7 of described PDSCH.
Embodiment is corresponding with preceding method, and the embodiment of the invention provides again a kind of UE, as shown in Figure 7, comprising:
Receiving element 201, be used for receiving the downlink data of its corresponding search volume, described downlink data comprises that the base station sends to E-PDCCH and the PDSCH of described UE, described E-PDCCH and PDSCH by described base station maps the different physics RB of same PRG on, and described base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing;
Blind Detecting unit 202 is used for the downlink data that receiving element 201 receives is carried out blind Detecting, to obtain described E-PDCCH;
Acquiring unit 203 for the E-PDCCH that obtains according to blind Detecting unit 202, obtains described PDSCH from the downlink data that receiving element 202 receives.
The UE that the embodiment of the invention provides, the E-PDCCH that the base station sends to UE is mapped in the different RB of same PRG to upper with PDSCH, because at least one pilot tone port of the pilot tone port of described E-PDCCH and described PDSCH uses same pre-coding matrix to carry out precoding processing, when UE carries out channel estimating to PDSCH, utilize the pilot tone port of E-PDCCH to carry out joint channel estimation, Effective Raise the performance of channel estimating.
Optionally, in one embodiment of the invention, it is fixing that the same pre-coding matrix of described use carries out the power proportions relation of at least one pilot tone port of the pilot tone port of described E-PDCCH of precoding processing and described PDSCH.
Optionally, in one embodiment of the invention, PDSCH in the described downlink data is order 1 transmission, when namely only the PDSCH in described downlink data is order 1 transmission, be described PDSCH when a pilot tone port is only arranged, described base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and the pilot tone port of described PDSCH are carried out precoding processing.
Concrete, in one embodiment of the invention, described base station uses same pre-coding matrix that the data of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH have been carried out precoding processing.
Concrete, in one embodiment of the invention, described base station uses same pre-coding matrix that the data of the layer corresponding with described at least one pilot tone port of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH are carried out precoding processing.
Concrete, in one embodiment of the invention, the pilot tone port that uses same pre-coding matrix to carry out the described PDSCH of precoding processing with the pilot tone port of described E-PDCCH comprises the pilot tone port 7 of described PDSCH.
Further, in one embodiment of the invention, as shown in Figure 8, described UE also comprises:
Preferably, channel estimating unit 204 is concrete be used for according to and at least one pilot tone port of described PDSCH use same pre-coding matrix to carry out the pilot tone port of described E-PDCCH of precoding processing and the pilot tone port of described PDSCH, the RB shared to PDSCH carries out joint channel estimation to upper channel.
It will be understood by those skilled in the art that each functional unit in each embodiment of the present invention can be integrated in the processing unit, also can be that the independent physics of unit exists, and also can be integrated in the unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, the form that also can adopt hardware to add SFU software functional unit realizes.
The above-mentioned unit of realizing with the form of SFU software functional unit can be stored in the computer read/write memory medium.Above-mentioned SFU software functional unit is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.Aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (Read-Only Memory, abbreviation ROM), the various media that can be program code stored such as random access memory (Random Access Memory is called for short RAM), magnetic disc or CD.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (28)
1. the sending method of a downlink data is characterized in that, comprising:
Definite needs are transferred to the downlink data of subscriber equipment, and described downlink data comprises Physical Downlink Control Channel E-PDCCH and the Physical Downlink Shared Channel PDSCH of enhancing;
Carry out the physical resource mapping of described downlink data, so that described E-PDCCH is mapped in the different Physical Resource Block RB of same precoding Resource Block group PRG to upper with PDSCH;
Downlink data after the described mapping is carried out precoding processing, and wherein, at least one pilot tone port of the pilot tone port of described E-PDCCH and described PDSCH uses same pre-coding matrix to carry out precoding processing;
Send downlink data after the described precoding processing to described subscriber equipment.
2. sending method according to claim 1 is characterized in that, it is fixing that the same pre-coding matrix of described use carries out the power proportions relation of at least one pilot tone port of the pilot tone port of described E-PDCCH of precoding processing and described PDSCH.
3. sending method according to claim 1 is characterized in that, the PDSCH in the described downlink data is order 1 transmission.
4. sending method according to claim 1, it is characterized in that the data of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, described E-PDCCH and the data of described PDSCH use same pre-coding matrix to carry out precoding processing.
5. sending method according to claim 1, it is characterized in that the data of the layer corresponding with described at least one pilot tone port of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH use same pre-coding matrix to carry out precoding processing.
6. according to claim 1 to 5 each described sending methods, it is characterized in that the pilot tone port that uses same pre-coding matrix to carry out the described PDSCH of precoding processing with the pilot tone port of described E-PDCCH comprises the pilot tone port 7 of described PDSCH.
7. the method for reseptance of a downlink data is characterized in that, comprising:
Subscriber equipment receives the downlink data that the base station sends, described downlink data comprises that the base station sends to Physical Downlink Control Channel E-PDCCH and the Physical Downlink Shared Channel PDSCH of the enhancing of described subscriber equipment, described E-PDCCH and PDSCH by described base station maps the different Physical Resource Block RB of same precoding Resource Block group PRG on, and described base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing;
Described subscriber equipment carries out blind Detecting to the downlink data of described reception, to obtain described E-PDCCH;
Described subscriber equipment obtains described PDSCH according to the described E-PDCCH that obtains from the downlink data of described reception.
8. method of reseptance according to claim 7 is characterized in that, it is fixing that the same pre-coding matrix of described use carries out the power proportions relation of at least one pilot tone port of the pilot tone port of described E-PDCCH of precoding processing and described PDSCH.
9. method of reseptance according to claim 7 is characterized in that, the PDSCH in the described downlink data is order 1 transmission.
10. method of reseptance according to claim 7, it is characterized in that described base station uses same pre-coding matrix that the data of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH have been carried out precoding processing.
11. method of reseptance according to claim 7, it is characterized in that described base station uses same pre-coding matrix that the data of the layer corresponding with described at least one pilot tone port of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH are carried out precoding processing.
12. to 11 each described method of reseptances, it is characterized in that according to claim 6 the pilot tone port that uses same pre-coding matrix to carry out the described PDSCH of precoding processing with the pilot tone port of described E-PDCCH comprises the pilot tone port 7 of described PDSCH.
13. method of reseptance according to claim 6 is characterized in that, described method also comprises:
Described subscriber equipment uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing according to described base station, and the RB shared to described PDSCH carries out channel estimating to upper channel.
14. require 13 described method of reseptances according to power, it is characterized in that, described subscriber equipment uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing according to described base station, the channel of described PDSCH is carried out channel estimating comprise:
Described subscriber equipment uses same pre-coding matrix to carry out the pilot tone port of described E-PDCCH of precoding processing and the pilot tone port of described PDSCH according at least one the pilot tone port with described PDSCH, and the RB shared to PDSCH carries out joint channel estimation to upper channel.
15. a base station is characterized in that, comprising:
Determining unit, definite downlink data that need to be transferred to subscriber equipment, described downlink data comprises Physical Downlink Control Channel E-PDCCH and the Physical Downlink Shared Channel PDSCH of enhancing;
Map unit is used for carrying out the physical resource mapping of the definite described downlink data of determining unit, so that described E-PDCCH is mapped in the different Physical Resource Block RB of same precoding Resource Block group PRG to upper with PDSCH;
Precoding unit is used for the downlink data after the described map unit mapping is carried out precoding processing, and wherein, at least one pilot tone port of the pilot tone port of described E-PDCCH and described PDSCH uses same pre-coding matrix to carry out precoding processing;
Transmitting element is used for sending downlink data after the described precoding unit precoding processing to described subscriber equipment.
16. base station according to claim 15 is characterized in that,
The pilot tone port that described precoding unit uses same pre-coding matrix to carry out the described E-PDCCH of precoding processing is fixed with the power proportions relation of at least one pilot tone port of described PDSCH.
17. base station according to claim 15 is characterized in that, the PDSCH in the described downlink data is order 1 transmission.
18. base station according to claim 15, it is characterized in that described precoding unit specifically is used for using same pre-coding matrix that the data of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, described E-PDCCH and the data of described PDSCH are carried out precoding processing.
19. base station according to claim 15, it is characterized in that described precoding unit specifically is used for using same pre-coding matrix that the data of the layer corresponding with described at least one pilot tone port of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH are carried out precoding processing.
20. to 19 each described base stations, it is characterized in that according to claim 15 the pilot tone port that uses same pre-coding matrix to carry out the described PDSCH of precoding processing with the pilot tone port of described E-PDCCH comprises the pilot tone port 7 of described PDSCH.
21. a subscriber equipment is characterized in that, comprising:
Receiving element, be used for receiving the downlink data that the base station sends, described downlink data comprises that the base station sends to Physical Downlink Control Channel E-PDCCH and the Physical Downlink Shared Channel PDSCH of the enhancing of described subscriber equipment, described E-PDCCH and PDSCH by described base station maps the different Physical Resource Block RB of same precoding Resource Block group PRG on, and described base station uses same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing;
The blind Detecting unit is used for the downlink data that described receiving element receives is carried out blind Detecting, to obtain described E-PDCCH;
Acquiring unit for the E-PDCCH that obtains according to described blind Detecting unit, obtains described PDSCH from the downlink data that described receiving element receives.
22. subscriber equipment according to claim 21 is characterized in that,
It is fixing that the same pre-coding matrix of described use carries out the power proportions relation of at least one pilot tone port of the pilot tone port of described E-PDCCH of precoding processing and described PDSCH.
23. subscriber equipment according to claim 21 is characterized in that, the PDSCH in the described downlink data is order 1 transmission.
24. subscriber equipment according to claim 21, it is characterized in that described base station uses same pre-coding matrix that the data of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH have been carried out precoding processing.
25. subscriber equipment according to claim 21, it is characterized in that, it is characterized in that described base station uses same pre-coding matrix that the data of the layer corresponding with described at least one pilot tone port of at least one pilot tone port of the pilot tone port of described E-PDCCH, described PDSCH, the data of described E-PDCCH, described PDSCH are carried out precoding processing.
26. to 25 each described subscriber equipmenies, it is characterized in that according to claim 21 the pilot tone port that uses same pre-coding matrix to carry out the described PDSCH of precoding processing with the pilot tone port of described E-PDCCH comprises the pilot tone port 7 of described PDSCH.
27. subscriber equipment according to claim 21, it is characterized in that, also comprise channel estimating unit, be used for using same pre-coding matrix that the pilot tone port of described E-PDCCH and at least one pilot tone port of described PDSCH are carried out precoding processing according to described base station, the RB shared to described PDSCH carries out channel estimating to upper channel.
28. require 21 described subscriber equipmenies according to power, it is characterized in that, described channel estimating unit specifically be used for according to and at least one pilot tone port of described PDSCH use same pre-coding matrix to carry out the pilot tone port of described E-PDCCH of precoding processing and the pilot tone port of described PDSCH, the RB shared to PDSCH carries out joint channel estimation to upper channel.
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