CN102904839B - Channel estimation methods, data transmission method for uplink and equipment - Google Patents
Channel estimation methods, data transmission method for uplink and equipment Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of channel estimation methods, data transmission method for uplink and equipment.A method comprises: a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair; If the value of codebook subset limitation signaling is greater than 4, then adopts and have the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical; If the value of codebook subset limitation signaling is less than or equal to 4, then adopts and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.The embodiment of the present invention shares the right situation of same Resource Block for control channel and data channel, and receiving device correctly can estimate actual channel, and then ensures the correct demodulation of control channel.
Description
Technical field
The embodiment of the present invention relates to the communication technology, particularly relates to a kind of channel estimation methods, data transmission method for uplink and equipment.
Background technology
Long Term Evolution (LongTermEvolution, hereinafter referred to as: LTE) or senior Long Term Evolution (LongTermEvolutionAdvanced, hereinafter referred to as: LTE-A) technology adopts frequency pilot sign to obtain channel estimation value, and apply this channel estimation value, demodulation is carried out to data.
In the prior art, running time-frequency resource unit for transfer of data is Resource Block (ResourceBlock, hereinafter referred to as: RB), Whole frequency band can be divided into multiple RB to (hereinafter referred to as: RBpair), each RBpair in time domain corresponding two time slots (hereinafter referred to as: slot), many groups frequency pilot sign and multi-layer data symbol transmit on same RBpair, divide with code between many groups frequency pilot sign or time frequency division multiplex mode transmission, wherein, the corresponding one group of frequency pilot sign of every layer data symbol.In LTE or LTE-A, sending ending equipment can transmit a certain Physical Downlink Control Channel (X-PhysicalDownlinkControlChannel on of a RBpair slot, hereinafter referred to as: X-PDCCH), another slot transmits Physical Downlink Shared Channel (PhysicalDownlinkSharedChannel, hereinafter referred to as: PDSCH).X-PDCCH is used for transmitting the control information of DSCH Downlink Shared Channel, and first receiving device receives X-PDCCH, solves the control information received required for PDSCH, and then separates PDSCH.X-PDCCH and PDSCH transmitted in same RBpair adopts identical pilot tone to carry out channel estimating, namely adopts the long pilot tone of same orthogonal code to carry out channel estimating.
But inventor is realizing finding in process of the present invention, and prior art, when carrying out the channel estimating of above-mentioned X-PDCCH, occurs the problem being unable to estimate out actual channel often, thus causes X-PDCCH demodulation mistake.
Summary of the invention
The embodiment of the present invention provides a kind of channel estimation methods, data transmission method for uplink and equipment.
The embodiment of the present invention provides a kind of channel estimation methods, comprising:
A Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
If the value of codebook subset limitation signaling is greater than 4, then adopts and have the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical;
If the value of codebook subset limitation signaling is less than or equal to 4, then adopts and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
Correspondingly, the embodiment of the present invention provides a kind of receiving device, comprising:
Data reception module, for a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
Processing module, if be greater than 4 for the value of codebook subset limitation signaling, then adopt and has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical; If the value of codebook subset limitation signaling is less than or equal to 4, then adopts and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
In the above embodiment of the present invention, after receiving device receives the data of sending ending equipment transmission on RBpair, the transfer of data number of plies on the data channel on this RBpair can be known by codebook subset limitation signaling, thus the number of plies of the frequency pilot sign that pilot tone running time-frequency resource identical in this RBpair superposes is informed according to this transfer of data number of plies, thus the number of plies of frequency pilot sign can be adopted to be greater than 2 layers of corresponding mode or adopt the number of plies of frequency pilot sign to be greater than channel estimating that 4 layers of corresponding mode carry out control channel, thus correctly can estimate actual channel, and then ensure the correct demodulation of control channel.
The embodiment of the present invention provides another kind of channel estimation methods, comprising:
The signaling that receiving end/sending end equipment sends, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, and wherein, control channel and data channel share described Resource Block pair;
If the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is greater than 2, then adopts and have the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical;
If the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is less than or equal to 2, then adopts and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
Correspondingly, the embodiment of the present invention provides another kind of receiving device, comprising:
Signaling receiver module, for the signaling that receiving end/sending end equipment sends, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, and wherein, control channel and data channel share described Resource Block pair;
Channel estimation module, if the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is greater than 2, then adopt and have the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical, if the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is less than or equal to 2, then adopt and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
The embodiment of the present invention provides a kind of data transmission method for uplink, comprising:
Signaling is sent to receiving device, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, wherein, control channel and data channel share described Resource Block pair, to make described receiving device according to described indication information, carry out the channel estimating of described control channel.
Correspondingly, the embodiment of the present invention provides a kind of sending ending equipment, comprising:
Signaling sending module, for sending signaling to receiving device, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, wherein, control channel and data channel share described Resource Block pair, to make described receiving device according to described indication information, carry out the channel estimating of described control channel.
The above embodiment of the present invention shares the situation of same RBpair for control channel and data channel, receiving device is before the channel estimating of carrying out the control channel in RBpair, can receiving end/sending end equipment send signaling, the indication information of 2 whether is greater than by the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that the resource block pair comprised in this signaling is identical, receiving device can adopt corresponding channel estimating mode to carry out the channel estimating of control channel, thus correctly can estimate actual channel, and then ensure the correct demodulation of control channel.
The embodiment of the present invention provides a kind of channel estimation methods, comprising:
A Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
Adopt has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
Correspondingly, embodiments provide a kind of receiving device, comprising:
Receiver module, for a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
Channel estimation module, has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel for adopting on the pilot tone running time-frequency resource that described resource block pair is identical.
In the above embodiment of the present invention, the situation of same RBpair is shared for control channel and data channel, receiving device is when carrying out the channel estimating of the control channel in RBpair, adopting regularly on pilot tone running time-frequency resource identical in RBpair has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of control channel, thus correctly can estimate actual channel, and then ensureing the correct demodulation of control channel, solution is simple and reliable, effectively reduces terminal complexity.
The embodiment of the present invention provides a kind of data transmission method for uplink, comprising:
Determine whether the number of plies N of the data of the required transmission of data channel to be sent is greater than 4,1≤N≤8;
If, then a Resource Block on send M layer data and corresponding M group frequency pilot sign, wherein, 1≤M≤4, described M layer data refers to the data of M data Layer of corresponding same code word in described N layer data, the number of plies of described M group frequency pilot sign on identical pilot tone running time-frequency resource is less than or equal to 2 layers, and described Resource Block is to referring to the Resource Block pair that described data channel and described control channel share.
Accordingly, the embodiment of the present invention provides a kind of sending ending equipment, comprising:
Determination module, for determining whether the number of plies N of the data that data channel to be sent transmits is greater than 4,1≤N≤8;
Sending module, if determine that the number of plies N of the data that data channel to be sent transmits is greater than 4 for described determination module, then a Resource Block on send M layer data and corresponding M group frequency pilot sign, wherein, 1≤M≤4, described M layer data refers to the data of M data Layer of corresponding same code word in described N layer data, the number of plies of described M group frequency pilot sign on identical pilot tone running time-frequency resource is less than or equal to 2 layers, and described Resource Block is to referring to the Resource Block pair that described data channel and described control channel share.
In the above embodiment of the present invention, on the RBpair that control channel and data channel share, sending ending equipment sends to the maximum number of plies of the downlink data of receiving device to be 4, namely has at most 2 layers of frequency pilot sign to share identical running time-frequency resource.Therefore, for receiving device, can give tacit consent to adopt on pilot tone running time-frequency resource identical in RBpair has the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of control channel, specifically, the frequency pilot sign that the Resource Block that receiving device can combine control channel place in RBpair receives carries out the channel estimating of control channel, thus avoids occurring that receiving device cannot carry out the situation of correct demodulation to control channel.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of channel estimation methods embodiment one of the present invention;
Fig. 2 is the structural representation of RBpair in the embodiment of channel estimation methods shown in Fig. 1 one;
Fig. 3 is the flow chart of channel estimation methods embodiment two of the present invention;
Fig. 4 is the flow chart of channel estimation methods embodiment three of the present invention;
Fig. 5 is the flow chart of data transmission method for uplink embodiment of the present invention;
Fig. 6 is the structural representation of receiving device embodiment one of the present invention;
Fig. 7 is the structural representation of receiving device embodiment two of the present invention;
Fig. 8 is the structural representation of receiving device embodiment three of the present invention;
Fig. 9 is the structural representation of sending ending equipment embodiment of the present invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the flow chart of channel estimation methods embodiment one of the present invention, and as shown in Figure 1, the method for the present embodiment can comprise:
Step 101, a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair.
If the value of step 102 codebook subset limitation signaling is greater than 4, then adopts and have the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
If the value of step 103 codebook subset limitation signaling is less than or equal to 4, then adopts and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
Below in conjunction with Fig. 2, the technical scheme of channel estimation methods embodiment one of the present invention shown in Fig. 1 is described in detail.
Fig. 2 is the structural representation of RBpair in the embodiment of channel estimation methods shown in Fig. 1 one, as shown in Figure 2, this RBpair comprises slot1 and slot2, this RBpair comprise in time domain 14 symbols (hereinafter referred to as: symbol), frequency domain comprises 12 subcarriers (hereinafter referred to as: subcarrier), demodulation pilot frequency (DemodulationReferenceSignal, hereinafter referred to as: frequency pilot sign DMRS) takies the 5th in RBpair on slot1,6 symbol, slot2 takies the 12nd in RBpair, 13 symbol.There is a kind of RBpair, in this kind of RBpair, X-PDCCH transmits on slot1, and PDSCH transmits on slot2.PDSCH and X-PDCCH uses identical frequency pilot sign to carry out channel estimating, and namely use and take the 5th, 6,12, subset or the complete or collected works of the DMRS symbol on 13 symbols carry out channel estimating.Wherein, the number of plies of DMRS symbol is identical with the number of data layers that PDSCH transmits, all corresponding one group of frequency pilot sign of every layer data, to estimate the channel that this data Layer experiences.
If receiving device can support at most 8 layer data transmission, then sending ending equipment needs at most transmission 8 groups of frequency pilot signs in a RBpair, and these 8 groups of frequency pilot signs are distinguish with different running time-frequency resources a bit, and some is that code divides.Such as, when supporting 8 layer data transmission, the 1st, 2,5,7 groups of frequency pilot signs take identical DMRS running time-frequency resource, the DMRS resource part of the dark color namely in Fig. 2, then the 1st, 2,5,7 groups of frequency pilot signs need to be divided by code to transmit on identical running time-frequency resource, also namely now, identical in RBpair pilot tone running time-frequency resource there are 4 layers of (being greater than 2 layers) frequency pilot sign; 3rd, 4,6,8 groups of frequency pilot signs take identical DMRS running time-frequency resource, the DMRS resource part of the light color namely in Fig. 2, also namely now, pilot tone running time-frequency resource identical in RBpair have 4 layers of (being greater than 2 layers) frequency pilot sign.Particularly, the orthogonal code of these 8 groups of frequency pilot signs employings is such as shown in table 1.
If a receiving device supports at most 4 layer data transmission, then sending ending equipment needs at most transmission 4 groups of frequency pilot signs in a RBpair.Wherein the 1st, 2 groups of frequency pilot signs can take identical DMRS running time-frequency resource, as the DMRS resource part of the dark color in Fig. 2, therefore, 1st, 2 groups of frequency pilot signs need to be divided by code to transmit on identical running time-frequency resource, also namely now, pilot tone running time-frequency resource identical in RBpair have 2 layers of (being less than or equal to 2 layers) frequency pilot sign.3rd, 4 groups of frequency pilot signs can take identical DMRS running time-frequency resource, as the DMRS resource part of the light color in Fig. 2, in like manner, now, pilot tone running time-frequency resource identical in RBpair have 2 layers of (being less than or equal to 2 layers) frequency pilot sign.
The orthogonal code sequence process that corresponding pilot signal can adopt sequence number 1 ~ 4 in following table 1 is transmitted with 4 layer data.
Table 1
| Sequence number | Orthogonal code sequence |
| 1 | [+1+1+1+1] |
| 2 | [+1-1+1-1] |
| 3 | [+1+1+1+1] |
| 4 | [+1-1+1-1] |
| 5 | [+1+1-1-1] |
| 6 | [-1-1+1+1] |
| 7 | [+1-1-1+1] |
| 8 | [-1+1+1-1] |
It can thus be appreciated that, when the transfer of data number of plies is less than or equal to 4, pilot tone running time-frequency resource identical in RBpair there are at most 2 layers of frequency pilot sign, now, the 5th, on 6 symbol, 2 groups of DMRS of superposition are mutually orthogonal, 12nd, on 13 symbol, 2 groups of DMRS symbols of superposition are mutually orthogonal, therefore, receiving device can combine the 5th, and the DMRS symbol that 6 symbol receive carries out the channel estimating of control channel.When the transfer of data number of plies is greater than 4, the minimum frequency pilot sign that haves three layers on pilot tone running time-frequency resource identical in RBpair, now, receiving device needs associating the 5th, 6,12,13 symbol could obtain the orthogonality between 4 groups of DMRS symbols, therefore, receiving device needs associating the 5th, 6,12, the DMRS symbol that 13 symbols receive carries out the channel estimating of control channel.
Therefore, receiving device wants to carry out correct channel estimating to control channel, first will obtain on pilot tone running time-frequency resource identical in RBpair have which floor frequency pilot sign, thus corresponding channel estimating mode could be adopted to carry out the channel estimating of control channel.And the number of plies of the frequency pilot sign that pilot tone running time-frequency resource identical in RBpair exists depends on the number of plies of the data that PDSCH transmits.But, owing to receive RBpair as shown in Figure 2 at receiving device after, first need to carry out channel estimating to X-PDCCH, now receiving device do not know the number of data layers of the PDSCH transmitted in slot2, therefore, receiving device cannot be informed on identical running time-frequency resource to have superposed altogether which floor DMRS symbol, thus also cannot know the channel estimating mode of the required control channel adopted.If receiving device thinks that maximum 2 layers of DMRS are superimposed upon on identical running time-frequency resource, and in fact the transmission number of plies of PDSCH is greater than 4, then receiving device is unable to estimate out actual channel, thus cannot carry out the demodulation of X-PDCCH.
For receiving device in above-mentioned prior art, the present embodiment cannot learn that the end adopts the mode of which kind of channel estimating to carry out the channel estimating of X-PDCCH and produced problem to the RBpair shown in Fig. 2, the solution of proposition just.
In the present embodiment, receiving device can use codebook subset limitation signaling CodebookSubsetRestriction to know the transfer of data number of plies on PDSCH.This CodebookSubsetRestriction signaling is a kind of high-rise semi-static signaling, and namely the value of this signaling represents that sending ending equipment sends to the largest data transfer number of plies on the PDSCH of receiving device before upper once this signaling arrives.By CodebookSubsetRestriction signaling, receiving device can determine which floor frequency pilot sign pilot tone running time-frequency resource identical in this RBpair has at most receive the data of sending ending equipment transmission on a RBpair after.
Specifically, if the value of CodebookSubsetRestriction is greater than 4, then represent that the transfer of data number of plies on the PDSCH of RBpair is greater than 4, also namely represent pilot tone running time-frequency resource identical in this RBpair has and be greater than 2 layers of frequency pilot sign, now, receiving device can adopt has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.In the present embodiment, the frequency pilot sign that the Resource Block at the frequency pilot sign that this channel estimating mode can receive for the Resource Block jointly controlling channel place and data channel place receives carries out the channel estimating of control channel, for example, if the transformat of this RBpair as shown in Figure 2, then receiving device can combine the 5th, 6,12, the DMRS symbol that 13 symbols receive carries out the channel estimating of control channel.
If the value of CodebookSubsetRestriction is less than or equal to 4, then represent that the transfer of data number of plies on the PDSCH of this RBpair is less than or equal to 4, also namely represent pilot tone running time-frequency resource identical in this RBpair has and be less than or equal to 2 layers of frequency pilot sign, now, receiving device can adopt has the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical, the frequency pilot sign that this channel estimating mode can receive for the Resource Block at control channel place in associating RBpair carries out the channel estimating of control channel, still with Fig. 2 for example, then receiving device can combine the 5th, the DMRS symbol that 6th symbol receives carries out the channel estimating of control channel.
It should be noted that, the present embodiment supposes that receiving device can support that at most 8 layer data are transmitted as the embodiment of prerequisite, those skilled in the art are understandable that equally, if receiving device can support more multi-layered transfer of data, then can be reference with above-described embodiment, analogize similar technical scheme, and, for 8 layer data transmission, orthogonal code also can adopt other code word outside table 1, as long as can ensure the orthogonality of DMRS.
In addition, the receiving device in the present embodiment can be the terminal equipments such as mobile phone, and sending ending equipment can be the network equipments such as base station.
In the present embodiment, after receiving device receives the data of sending ending equipment transmission on RBpair, the transfer of data number of plies on the data channel on this RBpair can be known by codebook subset limitation signaling, thus the number of plies of the frequency pilot sign that pilot tone running time-frequency resource identical in this RBpair superposes is informed according to this transfer of data number of plies, thus the number of plies of frequency pilot sign can be adopted to be greater than 2 layers of corresponding mode or adopt the number of plies of frequency pilot sign to be greater than channel estimating that 4 layers of corresponding mode carry out control channel, thus correctly can estimate actual channel, and then ensure the correct demodulation of control channel.
Correctly cannot estimate actual channel to solve above-mentioned receiving device, thus cannot carry out the problem of the demodulation of X-PDCCH, the embodiment of the present invention additionally provides following solution.
Fig. 3 is the flow chart of channel estimation methods embodiment two of the present invention, and as shown in Figure 3, the method for the present embodiment can comprise:
The signaling that step 301, receiving end/sending end equipment send, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, and wherein, control channel and data channel share described Resource Block pair;
Step 302, according to described indication information, carry out the channel estimating of described control channel.
Wherein, step 302 can be specially: if the number of plies of the frequency pilot sign on described indication information indexed resource block Middle Phase pilot tone running time-frequency resource is together greater than 2, then adopts and have the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical; If the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is less than or equal to 2, then adopts and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
Specifically, in the present embodiment, sending ending equipment can send signaling to receiving device, and whether the number of plies of the frequency pilot sign that this signaling can be specifically designed on pilot tone running time-frequency resource identical in this RBpair of instruction receiving device is greater than 2.Receiving device after receiving the signalling, whether the number of plies of the frequency pilot sign that can determine according to the indication information comprised in this signaling on pilot tone running time-frequency resource identical in RBpair is greater than 2, thus can, according to this indication information, adopt corresponding channel estimating mode to carry out the channel estimating of control channel.
It should be noted that, the present embodiment does not limit the concrete form of this signaling, does not limit the concrete form of the indication information comprised in this signaling yet, and those skilled in the art can designed, designed as required.Preferably, the signaling in above-described embodiment can be high-rise semi-static signaling or physical layer dynamic signaling.
This signaling is adopted to the situation of physical layer dynamic signaling, because physical layer dynamic signaling can transmit in each frame, therefore, the number of plies of the frequency pilot sign on identical pilot tone running time-frequency resource can be indicated in this physical layer dynamic signaling comparatively timely and accurately whether to be greater than 2.If the number of plies of the frequency pilot sign on the identical pilot tone running time-frequency resource in this RBpair of instruction receiving terminal is greater than 2, then receiving device can jointly control the channel estimating that the frequency pilot sign that the RBpair at channel and data channel place receives carries out control channel, such as, adopt the symbol of the 5th, 6,12 and 13 shown in above-mentioned Fig. 2 to carry out the channel estimating of control channel; If indicate the number of plies of the frequency pilot sign on the identical pilot tone running time-frequency resource in this RBpair of receiving terminal to be less than or equal to 2 in physical layer dynamic signaling, therefore, the frequency pilot sign that the Resource Block that receiving device can combine control channel place in RBpair receives carries out the channel estimating of control channel, such as, adopt the 5th shown in above-mentioned Fig. 2 and the 6th symbol to carry out the channel estimating of control channel.
This signaling is adopted to the situation of high-rise semi-static signaling, because the transmission cycle of the semi-static signaling of high level is longer, therefore this high-rise semi-static signaling not necessarily can indicate the number of plies of the frequency pilot sign on pilot tone running time-frequency resource identical in each frame exactly, therefore, what indicate in this high-rise semi-static signaling is the scope of the number of plies of frequency pilot sign on identical pilot tone running time-frequency resource, the such as maximum number of plies, receiving device can be determined after receiving the semi-static signaling of such high level, this high-rise semi-static signaling the time of advent to next high-rise semi-static signaling the time of advent between, the number of plies of the frequency pilot sign on identical pilot tone running time-frequency resource all can not exceed the maximum number of plies indicated in this high-rise semi-static signaling.Such as, the value of high-rise semi-static signaling is 0 or 1.When its value is 0, represent that the number of plies of the frequency pilot sign on identical pilot tone running time-frequency resource is less than or equal to 2; When its value is 1, represent that the number of plies maximum of the frequency pilot sign on identical pilot tone running time-frequency resource is greater than 2, the number of plies of the frequency pilot sign on namely identical pilot tone running time-frequency resource may be greater than 2, and also may be less than or equal to 2, vice versa.If high-rise semi-static signaling indicates the number of plies of the frequency pilot sign on identical pilot tone running time-frequency resource to be less than or equal to 2, then the frequency pilot sign that can jointly control on the Resource Block at channel place carries out channel estimating; In LTE, can jointly control the 5th on the RBpair at channel and data channel place, the frequency pilot sign on 6 symbols carries out channel estimating.If high-rise semi-static signaling indicates the number of plies maximum of the frequency pilot sign on identical pilot tone running time-frequency resource to be greater than 2, then the frequency pilot sign that can jointly control on the Resource Block at frequency pilot sign on the Resource Block at channel place and data channel place carries out channel estimating; In LTE, can jointly control the 5th on the RBpair at channel and data channel place, 6,12, the frequency pilot sign on 13 symbols carries out channel estimating.
About the semi-static signaling of above-mentioned high level and physical layer dynamic signaling, those skilled in the art can adopt the semi-static signaling of existing high level and physical layer dynamic signaling to realize, and repeat no more herein.
The above embodiment of the present invention shares the situation of same RBpair for control channel and data channel, receiving device is before the channel estimating of carrying out the control channel in RBpair, can receiving end/sending end equipment send signaling, the indication information of 2 whether is greater than by the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that the resource block pair comprised in this signaling is identical, receiving device can adopt corresponding channel estimating mode to carry out the channel estimating of control channel, thus correctly can estimate actual channel, and then ensure the correct demodulation of control channel.
Correctly cannot estimate actual channel to solve above-mentioned receiving device, thus cannot carry out the problem of the demodulation of control channel, the embodiment of the present invention additionally provides following solution.
Fig. 4 is the flow chart of channel estimation methods embodiment three of the present invention, and as shown in Figure 4, the method for the present embodiment can comprise:
Step 401, a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
Step 402, adopt and have the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
The method of the present embodiment equally can for the structure of RBpair shown in Fig. 2, and wherein X-PDCCH and PDSCH shares transmission on a RBpair.The method of the present embodiment, relative to the scheme of the embodiment of channel estimation methods shown in Fig. 1 one and embodiment two, realizes more simple.In the method for the present embodiment, which floor DMRS has been superposed altogether regardless of on identical running time-frequency resource in RBpair, receiving device adopts on pilot tone running time-frequency resource identical in RBpair all regularly has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of control channel, specifically, in the present embodiment, receiving terminal can jointly control the channel estimating that the frequency pilot sign that the RBpair at channel and data channel place receives carries out control channel, thus there will not be the situation being unable to estimate out actual channel.
Share the situation of same RBpair for control channel and data channel in the present embodiment, receiving device is when carrying out the channel estimating of the control channel in RBpair, adopting regularly on pilot tone running time-frequency resource identical in RBpair has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of control channel, thus correctly can estimate actual channel, and then ensure the correct demodulation of control channel, solution is simple and reliable, effectively reduces terminal complexity.
Be unable to estimate out actual channel to solve above-mentioned receiving device, thus cannot carry out the problem of the demodulation of control channel, the embodiment of the present invention additionally provides following solution.
In a data transmission method for uplink embodiment, sending ending equipment can send signaling to receiving device, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, wherein, control channel and data channel share described Resource Block pair, to make described receiving device according to described indication information, carry out the channel estimating of described control channel.
Specifically, in the present embodiment, sending ending equipment can send to receiving device the semi-static signaling of high level or the physical layer dynamic signaling that comprise described indication information.The data transmission method for uplink of the present embodiment is method sending ending equipment performed by corresponding with the channel estimation methods shown in Fig. 3, and it is similar that it realizes principle, repeats no more herein.
Fig. 5 is the flow chart of data transmission method for uplink embodiment of the present invention, and as shown in Figure 5, the method for the present embodiment can comprise:
Step 501, determine whether the number of plies N of the data of the required transmission of data channel to be sent is greater than 4,1≤N≤8;
If step 502, then a Resource Block on send M layer data and corresponding M group frequency pilot sign, wherein, 1≤M≤4, described M layer data refers to the data of M data Layer of corresponding same code word in described N layer data, the number of plies of described M group frequency pilot sign on identical pilot tone running time-frequency resource is less than or equal to 2 layers, and described Resource Block is to referring to the Resource Block pair that described data channel and described control channel share.
Specifically, the method that the present embodiment can send data for sending ending equipment is optimized, and the RBpair adopted in the present embodiment still can with reference to the structure shown in Fig. 2.Sending ending equipment is before transmission downlink data, can determine whether the transmission number of plies N of PDSCH to be sent is greater than 4, if N is greater than 4, then illustrate, the DMRS number of plies that identical running time-frequency resource superposes is greater than 2 layers, then receiving device needs to jointly control the channel estimating that the frequency pilot sign that the RBpair at channel and data channel place receives carries out control channel, if and N is less than or equal to 4, then illustrate, the DMRS number of plies that identical running time-frequency resource superposes is less than or equal to 2 layers, the frequency pilot sign that then receiving device only needs the Resource Block at control channel place in associating RBpair to receive carries out the channel estimating of control channel.
In order to reduce the complexity of receiving device, and avoid occurring the problem that channel estimating mode that receiving device adopts pilot tone is fuzzy, sending ending equipment can when N be greater than 4, on the RB-pair that control channel and data channel share, data on data channel to be sent are split, only send M layer, namely only send M layer data and the M layer frequency pilot sign corresponding with this M layer data.
Above-mentioned M layer data can corresponding first code word, also can corresponding second code word.In the present embodiment, sending ending equipment, when sending data, can send the data of M data Layer of first code word and corresponding M layer DMRS on a RBpair.Due to multiple RBpair can be adopted when transmitting downlink data, and wherein only have the situation that one or several RBpair may exist control channel and data channel and share, therefore, only can there is the RBpair process of the situation that control channel and data channel share for this in the present embodiment, and for other RBpair, it still can normally send N layer data.
It should be noted that, if step 501 determines that the number of plies N of the data of the required transmission of data channel to be sent is less than or equal to 4, the frequency pilot sign that then receiving device both can adopt the Resource Block at control channel place in associating RBpair to receive carries out the mode of the channel estimating of control channel, also can adopt to combine to jointly control the channel estimating that the frequency pilot sign that channel and data channel place RBpair receive carries out described control channel.
It should be noted that in addition, said method embodiment is all only transmitted as example with control channel and data channel and is described on same RBpair, but, the present embodiment does not limit to and this kind of resource form of RBpair, as long as it will be appreciated by persons skilled in the art that control channel and data channel need the resource adopting identical pilot signal to carry out channel estimating that the technical scheme of said method embodiment can be adopted to realize.
In the present embodiment, on the RBpair that control channel and data channel share, sending ending equipment sends to the maximum number of plies of the downlink data of receiving device to be 4, namely has at most 2 layers of frequency pilot sign to share identical running time-frequency resource.Therefore, for receiving device, can give tacit consent to adopt on pilot tone running time-frequency resource identical in RBpair has the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of control channel, specifically, the frequency pilot sign that the Resource Block that receiving device can combine control channel place in RBpair receives carries out the channel estimating of control channel, thus avoids occurring that receiving device cannot carry out the situation of correct demodulation to control channel.
Fig. 6 is the structural representation of receiving device embodiment one of the present invention, as shown in Figure 6, the receiving device of the present embodiment can comprise: data reception module 11, processing module 12, wherein, data reception module 11, for a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair; Processing module 12, if be greater than 4 for the value of codebook subset limitation signaling, then adopt and has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical; If the value of codebook subset limitation signaling is less than or equal to 4, then adopts and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
Specifically, when processing module 12 is greater than 2 layers of frequency pilot sign specifically for having on the pilot tone running time-frequency resource that described resource block pair is identical, the frequency pilot sign that the Resource Block at the frequency pilot sign that the Resource Block of combining described control channel place receives and data channel place receives carries out the channel estimating of described control channel; Or; When being less than or equal to 2 layers of frequency pilot sign for having on the pilot tone running time-frequency resource that described resource block pair is identical, the frequency pilot sign that the Resource Block of combining control channel place described in described resource block pair receives carries out the channel estimating of described control channel.
The receiving device of the above embodiment of the present invention may be used for the method performing embodiment of the method shown in Fig. 1, and it realizes principle and technique effect is similar, repeats no more herein.
Fig. 7 is the structural representation of receiving device embodiment two of the present invention, as shown in Figure 7, the receiving device of the present embodiment can comprise: signaling receiver module 21 and channel estimation module 22, wherein, signaling receiver module 21, for the signaling that receiving end/sending end equipment sends, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, wherein, control channel and data channel share described Resource Block pair, channel estimation module 22, if the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is greater than 2, then adopt and have the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical, if the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is less than or equal to 2, then adopt and have the mode being less than or equal to 2 layers of frequency pilot sign to carry out the channel estimating of described control channel on the pilot tone running time-frequency resource that described resource block pair is identical.
Specifically, this signaling is high-rise semi-static signaling or physical layer dynamic signaling, correspondingly, when channel estimation module 22 is greater than 2 layers of frequency pilot sign specifically for having on the pilot tone running time-frequency resource that described resource block pair is identical, the frequency pilot sign that the Resource Block at the frequency pilot sign that the Resource Block of combining described control channel place receives and data channel place receives carries out the channel estimating of described control channel; Or; When being less than or equal to 2 layers of frequency pilot sign for having on the pilot tone running time-frequency resource that described resource block pair is identical, the frequency pilot sign that the Resource Block of combining control channel place described in described resource block pair receives carries out the channel estimating of described control channel.
With receiving device shown in above-mentioned Fig. 7 accordingly, the embodiment of the present invention also provides a kind of sending ending equipment, comprise signaling sending module, for sending signaling to receiving device, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, and wherein, control channel and data channel share described Resource Block pair, to make described receiving device according to described indication information, carry out the channel estimating of described control channel.
The receiving device of the above embodiment of the present invention and sending ending equipment may be used for the method performing embodiment of the method shown in Fig. 3, and it realizes principle and technique effect is similar, repeats no more herein.
Fig. 8 is the structural representation of receiving device embodiment three of the present invention, as shown in Figure 8, the receiving device of the present embodiment can comprise: receiver module 31 and channel estimation module 32, wherein, receiver module 31, for a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair; Channel estimation module 32, has the mode being greater than 2 layers of frequency pilot sign to carry out the channel estimating of described control channel for adopting on the pilot tone running time-frequency resource that described resource block pair is identical.Particularly, channel estimation module 32 to carry out the channel estimating of described control channel to the frequency pilot sign of upper reception specifically for the Resource Block of combining described control channel and data channel place.
The receiving device of the present embodiment may be used for the method performing embodiment of the method shown in Fig. 4, and it realizes principle and technique effect is similar, repeats no more herein.
Fig. 9 is the structural representation of sending ending equipment embodiment of the present invention, as shown in Figure 9, the sending ending equipment of the present embodiment can comprise: determination module 41 and sending module 42, wherein, determination module 41, for determining whether the number of plies N of the data that data channel to be sent transmits is greater than 4,1≤N≤8; Sending module 42, if determine that the number of plies N of the data that data channel to be sent transmits is greater than 4 for described determination module, then a Resource Block on send M layer data and corresponding M group frequency pilot sign, wherein, 1≤M≤4, described M layer data refers to the data of M data Layer of corresponding same code word in described N layer data, the number of plies of described M group frequency pilot sign on identical pilot tone running time-frequency resource is less than or equal to 2 layers, and described Resource Block is to referring to the Resource Block pair that described data channel and described control channel share.
The sending ending equipment of the present embodiment may be used for the method performing embodiment of the method shown in Fig. 5, and it realizes principle and technique effect is similar, repeats no more herein.
One of ordinary skill in the art will appreciate that: all or part of step realizing said method embodiment can have been come by the hardware that program command is relevant, aforesaid program can be stored in a computer read/write memory medium, this program, when performing, performs the step comprising said method embodiment; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (17)
1. a channel estimation methods, is characterized in that, comprising:
A Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
If the value of codebook subset limitation signaling is greater than 4, then the frequency pilot sign that the Resource Block at frequency pilot sign and the data channel place received at the Resource Block at the described control channel place of associating receives is adopted to carry out the channel estimating of described control channel;
If the value of codebook subset limitation signaling is less than or equal to 4, then the frequency pilot sign adopting the Resource Block at control channel place described in the described resource block pair of associating to receive carries out the channel estimating of described control channel.
2. method according to claim 1, is characterized in that, the frequency pilot sign that the Resource Block at the frequency pilot sign that the Resource Block at described associating described control channel place receives and data channel place receives carries out the channel estimating of described control channel, comprising:
Combine described Resource Block carries out described control channel channel estimating to the 5th of upper reception the symbol, the 6th symbol, the 12nd symbol and the 13rd symbol;
The frequency pilot sign of the Resource Block reception at control channel place described in the described resource block pair of described associating carries out the channel estimating of described control channel, comprising:
Combine described Resource Block on the 5th symbol receiving and the 6th symbol carry out the channel estimating of described control channel.
3. a channel estimation methods, is characterized in that, comprising:
The signaling that receiving end/sending end equipment sends, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, and wherein, control channel and data channel share described Resource Block pair;
If the number of plies of the frequency pilot sign on described indication information indexed resource block Middle Phase pilot tone running time-frequency resource is together greater than 2, then the frequency pilot sign that the frequency pilot sign of Resource Block reception at the described control channel place of associating and the Resource Block at data channel place receive is adopted to carry out the channel estimating of described control channel;
If the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is less than or equal to 2, then the frequency pilot sign adopting the Resource Block at control channel place described in the described resource block pair of associating to receive carries out the channel estimating of described control channel.
4. method according to claim 3, is characterized in that, the signaling that described receiving end/sending end equipment sends, and comprising:
Receive the semi-static signaling of high level or the physical layer dynamic signaling of the transmission of described sending ending equipment.
5. the method according to claim 3 or 4, is characterized in that, the frequency pilot sign that the Resource Block at the frequency pilot sign that the Resource Block at described associating described control channel place receives and data channel place receives carries out the channel estimating of described control channel, comprising:
Combine described Resource Block carries out described control channel channel estimating to the 5th of upper reception the symbol, the 6th symbol, the 12nd symbol and the 13rd symbol;
The frequency pilot sign of the Resource Block reception at control channel place described in the described resource block pair of described associating carries out the channel estimating of described control channel, comprising:
Combine described Resource Block on the 5th symbol receiving and the 6th symbol carry out the channel estimating of described control channel.
6. a data transmission method for uplink, is characterized in that, comprising:
Signaling is sent to receiving device, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, wherein, control channel and data channel share described Resource Block pair, to make described receiving device according to described indication information, carry out the channel estimating of described control channel.
7. method according to claim 6, is characterized in that, sends signaling, comprising to receiving device:
The semi-static signaling of high level or the physical layer dynamic signaling that comprise described indication information is sent to receiving device.
8. a channel estimation methods, is characterized in that, comprising:
A Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
The Resource Block at the described control channel of associating and data channel place is adopted the frequency pilot sign of upper reception to be carried out to the channel estimating of described control channel.
9. method according to claim 8, is characterized in that, the frequency pilot sign that the Resource Block at the frequency pilot sign that the Resource Block at described associating described control channel place receives and data channel place receives carries out the channel estimating of described control channel, comprising:
Combine described Resource Block carries out described control channel channel estimating to the 5th of upper reception the symbol, the 6th symbol, the 12nd symbol and the 13rd symbol.
10. a data transmission method for uplink, is characterized in that, comprising:
Determine whether the number of plies N of the data of the required transmission of data channel to be sent is greater than 4,1≤N≤8;
If, then a Resource Block on send M layer data and corresponding M group frequency pilot sign, wherein, 1≤M≤4, described M layer data refers to the data of M data Layer of corresponding same code word in described N layer data, the number of plies of described M group frequency pilot sign on identical pilot tone running time-frequency resource is less than or equal to 2 layers, and described Resource Block is to referring to the Resource Block pair that described data channel and control channel share.
11. methods according to claim 10, is characterized in that, for the Resource Block of frequency pilot sign at described control channel place of control channel estimation in described M group frequency pilot sign.
12. methods according to claim 10, is characterized in that, the frequency pilot sign estimated for control channel in described M group frequency pilot sign is at the 5th symbol of described Resource Block and the 6th symbol.
13. 1 kinds of receiving devices, is characterized in that, comprising:
Data reception module, for a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
Processing module, if be greater than 4 for the value of codebook subset limitation signaling, then adopts the frequency pilot sign that the frequency pilot sign of Resource Block reception at the described control channel place of associating and the Resource Block at data channel place receive to carry out the channel estimating of described control channel; If the value of codebook subset limitation signaling is less than or equal to 4, then the frequency pilot sign adopting the Resource Block at control channel place described in the described resource block pair of associating to receive carries out the channel estimating of described control channel.
14. 1 kinds of receiving devices, is characterized in that, comprising:
Signaling receiver module, for the signaling that receiving end/sending end equipment sends, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, and wherein, control channel and data channel share described Resource Block pair;
Channel estimation module, if the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is greater than 2, the frequency pilot sign that the frequency pilot sign of Resource Block reception at the described control channel place of associating and the Resource Block at data channel place receive then is adopted to carry out the channel estimating of described control channel, if the number of plies of the frequency pilot sign on the pilot tone running time-frequency resource that described indication information indexed resource block Middle Phase is same is less than or equal to 2, the frequency pilot sign then adopting the Resource Block at control channel place described in the described resource block pair of associating to receive carries out the channel estimating of described control channel.
15. 1 kinds of sending ending equipments, is characterized in that, comprising:
Signaling sending module, for sending signaling to receiving device, whether the number of plies comprising the frequency pilot sign on the identical pilot tone running time-frequency resource of resource block pair in described signaling is greater than the indication information of 2, wherein, control channel and data channel share described Resource Block pair, to make described receiving device according to described indication information, carry out the channel estimating of described control channel.
16. 1 kinds of receiving devices, is characterized in that, comprising:
Receiver module, for a Resource Block on receiving end/sending end equipment send data, wherein, control channel and data channel share described Resource Block pair;
Channel estimation module, for the channel estimating adopting the described control channel of associating and the Resource Block at data channel place the frequency pilot sign of upper reception to be carried out to described control channel.
17. 1 kinds of sending ending equipments, is characterized in that, comprising:
Determination module, for determining whether the number of plies N of the data that data channel to be sent transmits is greater than 4,1≤N≤8;
Sending module, if determine that the number of plies N of the data that data channel to be sent transmits is greater than 4 for described determination module, then a Resource Block on send M layer data and corresponding M group frequency pilot sign, wherein, 1≤M≤4, described M layer data refers to the data of M data Layer of corresponding same code word in described N layer data, the number of plies of described M group frequency pilot sign on identical pilot tone running time-frequency resource is less than or equal to 2 layers, and described Resource Block is to referring to the Resource Block pair that described data channel and control channel share.
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| US9819457B2 (en) * | 2015-03-26 | 2017-11-14 | Apple Inc. | Device and method for adaptive channel estimation |
| CN107395333B (en) * | 2016-05-17 | 2022-01-21 | 中兴通讯股份有限公司 | Method and equipment for processing reference demodulation pilot frequency |
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| CN101615979A (en) * | 2008-06-24 | 2009-12-30 | 华为技术有限公司 | Feedback indication method in the multiaerial system, system and equipment |
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