CN102781098A - Parameter indicating method, parameter indicating device, parameter determination method and parameter determination device - Google Patents
Parameter indicating method, parameter indicating device, parameter determination method and parameter determination device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0665—Feed forward of transmit weights to the receiver
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Abstract
The invention discloses a transmission parameter indicating method, a transmission parameter indicating device, a transmission parameter determination method and a transmission parameter determination device. The transmission parameter indicating method comprises steps of conducting joint coding for a transmission parameter, generating parameter indicating signaling, wherein the transmission parameter comprises the number of layers of transmission, a scrambling identity, an antenna interface and pilot frequency overhead and sending the parameter indicating signaling to user equipment through downlink control information. By the aid of the technical scheme, the problem that at most two layers of orthogonal transmission between two nodes under a single user multiple-input multiple-output (SU-MIMO) mode in the prior art are conducted is solved, so that transmission can be performed among a plurality of users in the same cell under more demodulation orthogonal conditions.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of parameter indicating means, device and parameter determination method, device.
Background technology
In wireless communication technology; When base station side (for example the Node B of evolution is eNB) is used many antenna transmission data; Can take the mode of spatial reuse to improve message transmission rate; Promptly use identical running time-frequency resource to launch different data in the different antennas position at transmitting terminal, receiving terminal (for example user equipment (UE)) also uses many antennas to receive data.Under single user's situation, the resource of all antennas is all distributed to same user; This user occupies the physical resource that base station side is distributed alone in a transmission intercal; This transmission means is called single user's multiple-input, multiple-output (Single User Multiple-Input Multiple-Out-put abbreviates SU-MIMO as); Under multi-user's situation; The space resources of different antennae is distributed to different user; A user and at least one other user physical resource that the sharing base side is distributed in a transmission intercal, sharing mode can be space division multiple access mode or space division multiplexing mode, this transmission means is called multi-user's multiple-input, multiple-output (Multiple User Multiple-Input Multiple-Out-put; Abbreviate MU-MIMO as), wherein the physical resource of base station side distribution is meant running time-frequency resource.Transmission system is if support SU-MIMO and MU-MIMO simultaneously, and eNB then need provide the data under these two kinds of patterns to UE.UE need know that all eNB is for the used order (Rank) of these UE transmission MIMO data when SU-MIMO pattern or MU-MIMO pattern.Under the SU-MIMO pattern, the resource of all antennas is all distributed to same user, and the used number of plies of transmission MIMO data just equals eNB in the used order of transmission MIMO data; Under the MU-MIMO pattern, a corresponding user is transmitted total number of plies that the used number of plies is less than eNB transmission MIMO data, if carry out the switching of SU-MIMO pattern and MU-MIMO, eNB need be in the different transmission mode UE Different control data that send a notice.
Long Term Evolution (Long-Term Evolution; Abbreviate LTE as) version 8 (Release 8) standard in defined following three kinds of downlink physical control channels: physical down control format indicating channel (Physical Control Format Indicator Channel; Abbreviate PCFICH as), the automatic repeat requests indicating channel of physical mixed (Physical Hybrid Automatic Retransmission Request Indicator Channel; Abbreviate PHICH as) and Physical Downlink Control Channel (Physical Downlink Control Channel abbreviates PDCCH as).Wherein PDCCH is used for bearing downlink control information (Downlink Control Information abbreviates DCI as), comprising: uplink and downlink schedule information, and uplink power control information.The form of DCI (DCI format) is divided into following several kinds: DCI format 0, DCI format 1, DCI format 1A, DCI format1B, DCI format 1C, DCI format 1D, DCI format 2, DCI format 2A, DCI format 3 and DCI format3A etc.; Wherein the transmission mode 5 of support MU-MIMO of definition has been utilized the Downlink Control Information of DCI format 1D in the version 8, and (Downlink power offset field is expressed as δ to the descending power territory among the DCI format 1D
Power-offset) be used in reference to and be shown in that the power for a user reduces by half in the MU-MIMO pattern information of (promptly-10log10 (2)); Because 5 of MU-MIMO transmission modes are supported two users' MU-MIMO transmission; Through this descending power territory; MU-MIMO transmission mode 5 can be supported the dynamic switching of SU-MIMO pattern and MU-MIMO pattern; But no matter a UE is only supported the transmission of a stream at SU-MIMO pattern or this DCI format of MU-MIMO pattern; Though LTE Release 8 supports single user's transmission of maximum two streams in transmission mode 4, because the switching between the transmission mode can only be semi-static, so in LTE version 8, can not accomplish the dynamic switching of single user's multithread transmission and multi-user's transmission.
In the version 9 (Release 9) of LTE; Defeated in order to strengthen descending multi-antenna transmitting; Introduced the transmission mode that double-current wave beam forms (Beamforming); And Downlink Control Information has increased DCI format 2B to support this transmission mode, and the sign bit that a scrambler sequence identity (Scrambling Identity abbreviates SCID as) is arranged in DCI format 2B is to support two different scrambler sequence; ENB can distribute to different user with these two scrambler sequence, a plurality of users of same resource multiplex.In addition, when having only a transmission block to enable, the antenna port when new data indication (New Data Indication abbreviates NDI as) bit that the transmission block of disable (Disabled) is corresponding also is used for indicating the individual layer transmission.
In the version 10 (Release 10) of LTE; Defeated in order further to strengthen descending multi-antenna transmitting; Introduce transmission mode 9, on the basis of transmission mode 9 double-current beamforming (pattern 8) in compatible LTE version 9, further be strengthened to the maximum wave beam forming of supporting 8 layer transmission; And Downlink Control Information has increased DCI format 2C to support this transmission mode; In DCIformat 2C, SCID, number of layers and the antenna port mode through combined coding is designed the control signaling, and reused the SCID bit that is used to indicate the scrambler sequence identity in the pattern 8.Equally, when having only a transmission block to enable, the antenna port when new data indication (NDI) bit that the transmission block of disable (Disabled) is corresponding also is used for indicating the individual layer transmission.In the version 10; Pass through quadrature mask (Orthogonal Cover Code between each port; Abbreviate OCC as) the realization quadrature; The distribution of the OCC sign indicating number of different port (port 7～14) can be unified as shown in table 1, and the last mode of using of different orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing abbreviates OFDM as) symbol l ' of wherein carrying demodulated reference signal is according to formula w
p(l ') decision,
Wherein, m '=0,1,2, each physics time is Zi the relative position that hangs down to high demodulation pilot frequency, n in the difference respective figure 1
PRBCorresponding to the fast index of physics running time-frequency resource that is used for Physical Downlink Shared Channel (Physical Downlink Share Channel abbreviates PDSCH as) transmission.
Table 1
Though transmission mode 9 is the maximum transfer of data that can support 8 layers under the SU-MIMO pattern, with respect to pattern 8, MU-MIMO is not strengthened, promptly maximum can only support two users and each user can only 1 layer demodulation pilot frequency quadrature under the transmission situation.The demodulated reference signal that is relied on owing to transmission mode 9 simultaneously produces according to cell identity (cell identity); And pattern 8, pattern 9 times; Demodulation pilot frequency pattern position between the different nodes is identical; When cell edge, different nodes take that pilot tone can't realize quadrature between the user of same asset, therefore are unfavorable for the elimination of disturbing.Especially in the heterogeneous network, there are comparatively serious disturbance in macrocell and low power nodes (Low powerNode abbreviates LPN as).In LTE version 11, proposed in heterogeneous network, make macrocell and low power nodes adopt the mode of same cells identity, reduce the interference between macrocell and the low power nodes through centralized dispatching.DCI format 2C based on pattern 9 correspondences; The maximum orthogonal transmission that can only realize 2 layers between two nodes; Be each node can only be with the transmission of 1 layer the time, could realize the quadrature of demodulation pilot frequency, greatly limitations the gain that cell splitting brought; To this problem, effective solution is not proposed as yet at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of parameter indicating means, device and parameter determination method, device, one of to address the above problem at least.
According to an aspect of the present invention, a kind of parameter indicating means is provided, has comprised: transmission parameter is carried out combined coding generate the parameter indication signaling, wherein, transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense; The above-mentioned parameter indication signaling is sent to subscriber equipment through Downlink Control Information.
According to another aspect of the present invention; A kind of parameter indicating device is provided, has comprised: the combined coding module is used for that transmission parameter is carried out combined coding and generates the parameter indication signaling; Wherein, transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense; Signaling sending module is used for the above-mentioned parameter indication signaling is sent to subscriber equipment through Downlink Control Information.
According to a further aspect of the invention, a kind of parameter determination method is provided, has comprised: subscriber equipment receives the parameter indication signaling that the transmission parameter indicating device sends through Downlink Control Information; Subscriber equipment is according to the above-mentioned parameter indication signaling; Confirm the transmission parameter configuration; Wherein, The above-mentioned parameter indication signaling is generated through transmission parameter being carried out combined coding by the transmission parameter indicating device, and wherein, transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense.
According to a further aspect of the invention, provide a kind of parameter to confirm device, having comprised: the signaling receiver module is used to receive the parameter indication signaling that the transmission parameter indicating device sends through Downlink Control Information; The parameter determination module; Be used for according to the above-mentioned parameter indication signaling; Confirm the transmission parameter configuration, wherein, the above-mentioned parameter indication signaling is generated through transmission parameter being carried out combined coding by the transmission parameter indicating device; Wherein, transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense.
Through the present invention; Employing is carried out combined coding to the transmission parameters such as the number of plies, scrambler sequence identity, antenna port, pilot-frequency expense of transmission and is generated the parameter indication signaling; And send to the scheme of subscriber equipment through Downlink Control Information; Solved in the prior art the maximum problem that can only realize the orthogonal transmission of 2 layers between two nodes under the SU-MIMO pattern, and then reached and support to be implemented between a plurality of users under the same sub-district effect of transmitting under the more demodulation pilot frequency quadrature condition.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the transmission parameter indicating means of the embodiment of the invention;
Fig. 2 is the demodulation pilot frequency pattern of OCC=2 during normal cyclic prefix in the LTE version 10 of the instance according to the present invention;
Fig. 3 is the demodulation pilot frequency pattern of OCC=4 during normal cyclic prefix in the LTE version 10 of the instance according to the present invention;
Fig. 4 is the structured flowchart according to the transmission parameter indicating device of the embodiment of the invention;
Fig. 5 is the structured flowchart of transmission parameter indicating device according to the preferred embodiment of the invention;
Fig. 6 is a flow chart of confirming method according to the transmission parameter of the embodiment of the invention;
Fig. 7 is a structured flowchart of confirming device according to the transmission parameter of the embodiment of the invention;
Fig. 8 is that transmission parameter is confirmed the structured flowchart of device according to the preferred embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Fig. 1 is the flow chart according to the transmission parameter indicating means of the embodiment of the invention.As shown in Figure 1, comprise according to the transmission parameter indicating means of the embodiment of the invention:
Step S102 carries out combined coding to transmission parameter and generates the parameter indication signaling, and wherein, transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense;
Step S104 sends to subscriber equipment with the above-mentioned parameter indication signaling through Downlink Control Information.
The above-mentioned parameter indicating means; When indication user device transmissions parameter; Can carry out combined coding to parameters such as the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense and generate the parameter indication signaling, send to subscriber equipment through Downlink Control Information then.Since said method with pilot-frequency expense as transmission parameter participated in the combined coding, so can select pilot-frequency expense more flexibly, thereby between the multi-user, support the more demodulation pilot frequency orthogonal transmission of multilayer.
Preferably, step S102 may further include following processing: confirm that according to above-mentioned transmission parameter the layer when transmitting based on the subscriber equipment specific reference signals arrives the mapping mode of antenna port, and generate the parameter indication signaling according to this mapping mode.
After the transmission parameters such as the number of plies, scrambler sequence identity, antenna port, pilot-frequency expense to transmission carry out combined coding; Can determine layer the mapping mode when transmitting to antenna port based on the subscriber equipment specific reference signals; For example, when number of layers is v, if its corresponding port is { p
0, p
1... p
V-1, layer i (o≤i≤then v-1) corresponding to port p
iJust can design the parameter indication signaling then, and finally generate the parameter indication signaling according to this corresponded manner.
Preferably, confirm that according to transmission parameter layer mapping mode to antenna port when transmitting based on the subscriber equipment specific reference signals can comprise:
Confirm the mapping mode of layer according to following formula to antenna port:
When having only a layer transmission, y
(p)(i)=x
(0)(i), wherein, x
(0)(i) be the modulation symbol of layer 0, y
(p)(i) be the data of corresponding port p after the respective layer precoding, p ∈ 0,4,5,7,8,9,10},
Be number of modulation symbols waiting for transmission on the current layer;
When number of layers greater than 1 the time, layer being mapped as to port
Wherein, x
(j)(i) be the modulation symbol of layer j,
Be corresponding port p after the respective layer precoding
jData, p
jCorresponding port is indicated by indication signaling, and o≤j≤v-1, v are number of layers,
Be number of modulation symbols waiting for transmission on the current layer.
Through above-mentioned formula, can determine layer the mapping mode when transmitting, for the constructing variable indication signaling provides foundation to antenna port based on the subscriber equipment specific reference signals.
Preferably; Can further include following processing after the step S102: according to the size indication quadrature mask despreading length of the port numbers of distributing, when the maximum port numbers of distributing during greater than first threshold, subscriber equipment adopts the quadrature mask of first length; When the maximum port numbers of distributing during smaller or equal to first threshold; Subscriber equipment adopts the quadrature mask of first length or second length, and wherein, first length is greater than second length.
Quadrature mask despreading length can implicitly be indicated through the maximum port numbers of distributing.Because the bigger required OCC length of maximum port numbers of distributing is just long more; Therefore can set a threshold value (first threshold),, just use long OCC (the quadrature mask of first length) when the maximum port numbers of distributing during greater than this threshold value; When the maximum port numbers of distributing during smaller or equal to this threshold value; Just use short OCC (the quadrature mask of second length), because OCC has backward compatible characteristic, therefore; During smaller or equal to this threshold value, use long OCC also to be fine in the maximum port numbers of distributing.Need to prove, be a scope because OCC supports, so when the maximum port numbers of distributing continues to increase, second threshold value, the 3rd threshold value or the like just need be set, to select longer OCC for use.In the hereinafter instance, be that 2, the second length quadrature mask-lengths are 4 to describe with the first length quadrature mask-length.
Preferably, step S102 can further include following processing: when having only a transmission block to enable, the new data indication bit that the transmission block of disable is corresponding is used to carry out combined coding.
In said method, owing to when carrying out combined coding, added this parameter of pilot-frequency expense, the bit that therefore need increase newly.When having only a transmission block to enable, the new data indication bit that the transmission block of disable is corresponding is left unused, and therefore can this bit be reused in and carry out combined coding, thereby improve the utilance of bit, also is easier to realize.
Below in conjunction with instantiation and Fig. 2, Fig. 3 above-mentioned preferred embodiment is elaborated.In the instance below, instance 1 and instance 2 are based on pattern shown in Figure 2, and instance 3 and instance 4 are based on pattern shown in Figure 3.Fig. 2, be a Physical Resource Block (Physical Resource Block shown in 3; Abbreviate PRB as) interior demodulated reference signal (Demodulation Reference Signal; Abbreviate DMRS as; Be also referred to as Ue-specific Reference Signal) the mapping pattern, wherein each lattice is represented a Resource Unit (Resource Element abbreviates RE as).
Need to prove, below the expense of the demodulation reference mark that relates among the embodiment be pairing with Fig. 2 or Fig. 3, wherein during the 12RE expense among the embodiment 1,2, corresponding to the pattern of Fig. 2 (a), during the 24RE expense, corresponding to 2 (b) pattern; During 12RE expense among the embodiment 3,4, corresponding to the pattern of Fig. 3 (a), during the 24RE expense, corresponding to 3 (b) pattern.
Instance 1:
In this instance; Following information is carried out combined coding: the number of plies of transmission, scrambler sequence identity, antenna port and demodulated reference signal expense; The parameter indication signaling structure that generates is as shown in table 2, and the parameter indication signaling comprises bit 1,2,3 and 4 and is used to indicate each information.When having only a transmission block to enable, new data indication (NDI) bit that the transmission block of disable (Disabled) is corresponding can be reused in and carry out combined coding.
Table 2
Through this parameter indication signaling, can the maximum orthogonal transmission that realizes 4 layers.And under the situation of different districts identity, can divide into groups through distributing different demodulation pilot frequencies, realize quadrature, and when different nodes adopt the same cells identity, then can realize the quadrature of different layers through configuration more flexibly.
Based on above-mentioned parameter indication signaling advice method; Further; The length of quadrature mask (OCC) can be through the port numbers implicit expression notice of distributing; When comprising port one 1 in the port numbers of distributing and during greater than 11 port, then using length is 4 OCC sign indicating number, otherwise uses the OCC sign indicating number of OCC=2 or OCC=4.
Simultaneously, corresponding layer to the corresponded manner of antenna port (based on the precoding mode of the antenna port of specific (UE-specific) reference signal of UE) is:
Based on the single antenna port transmission time, under the situation of compatible LTE version 8, version 9, version 10, precoding can be further defined as y
(p)(i)=x
(0)(i), wherein p ∈ { 0,4,5,7,8,9,10} is the port numbers that is used for the single antenna port of physical channel data transmission.
When the antenna port based on the specific reference signal of UE transmits 2 layers; If the port-for-port 7,8 of control signaling indication; Layer to the precoding of port relation for
if the port-for-port 9,10 of control signaling indication, relation is
to layer to the precoding of port
When the antenna port based on the specific reference signal of UE transmitted more than 2 layers, layer to the precoding relation of port did
Above formula index
indicates the current layer number of modulation symbols to be transmitted.x
(v)(i) modulation symbol of presentation layer v, y
(p)(i) data of corresponding port p after the precoding of expression respective layer.
In this embodiment, { 78 11 13} are corresponding to first group DMRS position among Fig. 2 (b) for port; { 9,10,12,14} is corresponding to second group of DMRS position among Fig. 2 (b) for port.Wherein Fig. 2 (a) respective layer number is smaller or equal to 2 o'clock, port 7, the DMRS position of 8}.
Instance 2:
In the present embodiment; Following information is carried out combined coding: the number of plies of transmission, scrambler sequence identity, antenna port and demodulated reference signal expense; The parameter indication signaling structure that generates is as shown in table 3, and the parameter indication signaling comprises bit 1,2,3 and 4 and is used to indicate each information.When having only a transmission block to enable, new data indication (NDI) bit that the transmission block of disable (Disabled) is corresponding can be reused in and carry out combined coding.
Table 3
Through this parameter indication signaling, can the maximum orthogonal transmission that realizes 8 layers.And have under the situation of different cell identities at different nodes, can divide into groups through distributing different demodulation pilot frequencies, realize quadrature, and when different nodes adopt the same cells identity, then can realize the quadrature of different layers through configuration more flexibly.
Based on above-mentioned parameter indication signaling advice method; Further; The length of quadrature mask (OCC) can be through the port numbers implicit expression notice of distributing; When comprising port one 1 in the port numbers of distributing and during greater than 11 port, then using length is 4 OCC sign indicating number, otherwise uses the OCC sign indicating number of OCC=2 or OCC=4.
Simultaneously, corresponding layer to the corresponded manner of antenna port (based on the precoding mode of the antenna port of specific (UE-specific) reference signal of UE) is:
Based on the single antenna port transmission time, under the situation of compatible LTE version 8, version 9, version 10, precoding can be further defined as y
(p)(i)=x
(0)(i), wherein p ∈ { 0,4,5,7,8,9,10} is the port numbers that is used for the single antenna port of physical channel data transmission.
When the antenna port based on the specific reference signal of UE transmits 2 layers; If the port-for-port 7,8 of control signaling indication; Layer to the precoding of port relation for
if the port-for-port 9,10 of control signaling indication, relation is
to layer to the precoding of port
When the antenna port based on the specific reference signal of UE transmits 3 layers; If the port-for-port { 7 of control signaling indication; 8; 9}; Layer concerns for
if the port-for-port { 7 of control signaling indication to the precoding of port; 8,11}, relation is
to layer and be that 4 OCC sign indicating number carries out spread spectrum/despreading based on length to the precoding of port; If the port-for-port { 9 of control signaling indication; 10; 12}, relation is
to layer and be that 4 OCC sign indicating number carries out spread spectrum/despreading based on length to the precoding of port.
When the antenna port based on the specific reference signal of UE transmits 4 layers; If the port-for-port { 7 of control signaling indication; 8; 9,10}, layer concerns for
wherein v=4 to the precoding of port; If the port-for-port { 7 of control signaling indication; 8; 11; 13}, relation is
to layer and be that 4 OCC sign indicating number carries out spread spectrum/despreading based on length to the precoding of port; If the port-for-port { 9 of control signaling indication; 10; 12; 14}, relation is
to layer and be that 4 OCC sign indicating number carries out spread spectrum/despreading based on length to the precoding of port.
When the antenna port based on the specific reference signal of UE transmitted more than 4 layers, layer to the precoding relation of port did
Above formula index
indicates the current layer number of modulation symbols to be transmitted.x
(v)(i) modulation symbol of presentation layer v, y
(p)(i) data of corresponding port p after the precoding of expression respective layer.
In this embodiment, { 781113} is corresponding to first group DMRS position among Fig. 2 (b) for port; { 9,10,12,14} is corresponding to second group of DMRS position among Fig. 2 (b) for port.Wherein Fig. 2 (a) respective layer number is smaller or equal to 2 o'clock, port 7, the DMRS position of 8}.
Embodiment 3:
In this instance; Following information is carried out combined coding: the number of plies of transmission, scrambler sequence identity, antenna port and demodulated reference signal expense; The parameter indication signaling structure that generates is as shown in table 4, and the parameter indication signaling comprises bit 1,2 and 3 and is used to indicate each information.When having only a transmission block to enable, new data indication (NDI) bit that the transmission block of disable (Disabled) is corresponding can be reused in and carry out combined coding.
Table 4
In the table, when number of layers＜=4, DMRS adopts the pattern of 12 RE, when number of layers＞4, uses the pattern of 24 RE.
Based on above-mentioned parameter indication signaling advice method, further, the length of quadrature mask (OCC) is fixed as 4.
Above-mentioned transmission parameter signaling advice method is with among Fig. 3, and first group of corresponding port of DMRS is { 78 11 13}; Second group of port is for { 9 10 12 14} are that example is illustrated; In the practical application, two groups of ports also can be respectively first group of port { 7 89 10}, second group of port { 11 12 13 14}; When adopting the described packet mode of the latter, revise 7 according to packet mode is corresponding in only needing to show---7; 8---8; 11---9; 13---10; 9---11; 10---12; 12---13; 14---14.Wherein, the pattern shown in Fig. 3 (a) is a sub-set of pattern shown in Fig. 3 (b), the DMRS pattern when having only first group of port to use.
If the port that distributes during the K layer is respectively { P
0, P
1... P
K-1, then layer to the corresponding relation of port does, layer k, and 0≤k≤K-1 is corresponding to port P
kFor example, when the dicode word enabled, what state 2 was supported was 3 layers of transmission, and port is that { 7,8,11} then representes p
0=7, p
1=8, p
2=11; This moment, layer 0, corresponding port 7, layer 1 corresponding port 8, layer 2 corresponding port 11.
Instance 4:
In the present embodiment; One or more information in the following information are carried out combined coding: the number of plies of transmission, scrambler sequence identity, antenna port and demodulated reference signal expense; The parameter indication signaling structure that generates is as shown in table 5, and the parameter indication signaling comprises bit 1,2,3 and 4 and is used to indicate each information.When having only a transmission block to enable, new data indication (NDI) bit that the transmission block of disable (Disabled) is corresponding can be reused in and carry out combined coding.
Table 5
Based on the advice method of above-mentioned parameter indication signaling, further, the length of quadrature mask (OCC) is fixed as 4.
At above-mentioned transmission parameter signaling advice method, be with among Fig. 3, first group of corresponding port of DMRS is { 78 11 13}; Second group of port is for { 9 10 12 14} are that example is illustrated; In the practical application, two groups of ports also can be respectively first group of port { 789 10}, second group of port { 11 12 13 14}; When adopting the described packet mode of the latter, revise 7 according to packet mode is corresponding in only needing to show---7; 8---8; 11---9; 13---10; 9---11; 10---12; 12---13; 14---14.Wherein the pattern shown in Fig. 3 (a) is a sub-set of pattern shown in Fig. 3 (b), the DMRS pattern when having only first group of port to use.
If the port that distributes during the K layer is respectively { P
0, P
1... P
K-1, then layer to the corresponding relation of port does, layer k, and 0≤k≤K-1 is corresponding to port P
kMaximum 4 users multiplexing (this moment every user 1 or 2 layers) orthogonal multiplex of supporting altogether under this mode; And when existing client layer greater than 2 the time, maximum only allows 2 users multiplexing, and every user is no more than 4 layers.Should guarantee as far as possible in the port assignment process that two groups of port numbers that use are identical.
In the above under the configuration mode in the table; Situation for all re-transmissions all is not optimized; But when considering that single codeword stream user and two streams of code words users carry out multiplexing situation; Can only further optimize double-deck situation of single codeword stream, the parameter after the optimization is that signaling structure is as shown in table 6, adopts the mapping mode that arrives port with above-mentioned consistent layer simultaneously.
Table 6
Need to prove; Various corresponding relations in the above-mentioned instance (for example in the form behind the combined coding corresponding relation of index and specific object corresponding relation, antenna port and the number of plies, the index of layer and the corresponding relation of pilot frequency design) are not limited to this unique corresponding relation; Promptly; Their order can be exchanged combination arbitrarily, as long as corresponding one by one.Particularly, the specific object that the index behind combined coding is corresponding unique, the index behind the corresponding unique combined coding of specific object.Above-mentioned instance is just enumerated its corresponding a kind of possibility.
Fig. 4 is the structured flowchart according to the transmission parameter indicating device of the embodiment of the invention.As shown in Figure 4, comprise according to the transmission parameter indicating device of the embodiment of the invention:
Combined coding module 42 is used for that transmission parameter is carried out combined coding and generates the parameter indication signaling, and wherein, transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense;
Signaling sending module 44 is connected to combined coding module 42, is used for the above-mentioned parameter indication signaling is sent to subscriber equipment through Downlink Control Information.
In said apparatus; Combined coding module 42 is when indication user device transmissions parameter; Can carry out combined coding to parameters such as the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense and generate the parameter indication signaling, send to subscriber equipment through Downlink Control Information then.Since combined coding module 42 with pilot-frequency expense as transmission parameter participated in the combined coding, so can select pilot-frequency expense more flexibly, thereby between the multi-user, support the more demodulation pilot frequency orthogonal transmission of multilayer.
Preferably, as shown in Figure 5, combined coding module 42 can further include:
Signaling design cell 422 is used for confirming that according to above-mentioned transmission parameter the layer when transmitting based on the subscriber equipment specific reference signals arrives the mapping mode of antenna port, and generates the parameter indication signaling according to this mapping mode.
After the transmission parameters such as the number of plies, scrambler sequence identity, antenna port, pilot-frequency expense to transmission carry out combined coding; Can determine layer the mapping mode when transmitting to antenna port based on the subscriber equipment specific reference signals; For example, when number of layers is v, if its corresponding port is { p
0, p
1... p
V-1, layer i (o≤i≤then v-1) corresponding to port p
iJust can design the parameter indication signaling then, and finally generate the parameter indication signaling according to this corresponded manner.
Preferably, signaling design cell 422 confirms that layer mapping mode to antenna port when transmitting based on the subscriber equipment specific reference signals can comprise:
Confirm the mapping mode of layer according to following formula to antenna port:
When having only a layer transmission, y
(p)(i)=x
(0)(i), wherein, x
(0)(i) be the modulation symbol of layer 0, y
(p)(i) be the data of corresponding port p after the respective layer precoding, p ∈ 0,4,5,7,8,9,10},
Be number of modulation symbols waiting for transmission on the current layer;
When number of layers greater than 1 the time, layer being mapped as to port
Wherein, x
(j)(i) be the modulation symbol of layer j,
Be corresponding port p after the respective layer precoding
jData, p
jCorresponding port is indicated by indication signaling, and o≤j≤v-1, v are number of layers,
Be number of modulation symbols waiting for transmission on the current layer.
Through above-mentioned formula, can determine layer the mapping mode when transmitting, for the constructing variable indication signaling provides foundation to antenna port based on the subscriber equipment specific reference signals.
Preferably, as shown in Figure 5, the transmission parameter indicating device can further include according to the preferred embodiment of the invention:
Mask indicating module 46 is connected to combined coding module 42, is used for the size indication quadrature mask despreading length according to the maximum port numbers of distributing; When the maximum port numbers of distributing during greater than first threshold; Subscriber equipment adopts the quadrature mask of first length, and when the maximum port numbers of distributing during smaller or equal to first threshold, subscriber equipment adopts the quadrature mask of first length or second length; Wherein, first length is greater than second length.
Quadrature mask despreading length can implicitly be indicated through the maximum port numbers of distributing.Because the bigger required OCC length of maximum port numbers of distributing is just long more; Therefore can set a threshold value (first threshold),, just use long OCC (the quadrature mask of first length) when the maximum port numbers of distributing during greater than this threshold value; When the maximum port numbers of distributing during smaller or equal to this threshold value; Just use short OCC (the quadrature mask of second length), because OCC has backward compatible characteristic, therefore; During smaller or equal to this threshold value, use long OCC also to be fine in the maximum port numbers of distributing.
Preferably, as shown in Figure 5, combined coding module 42 may further include:
Bit is reused unit 424, is connected to parameter list unit 422, is used for when having only a transmission block to enable, and the new data indication bit that the transmission block of disable is corresponding is used to carry out combined coding.
Because combined coding module 42 has added this parameter of pilot-frequency expense when carrying out combined coding, therefore need to increase new bit and be used as carrier.When having only a transmission block to enable, the new data indication bit that the transmission block of disable is corresponding is left unused, and therefore can this bit be reused in and carry out combined coding, thereby improve the utilance of bit, also is more convenient for realizing.
Fig. 6 is a flow chart of confirming method according to the transmission parameter of the embodiment of the invention.As shown in Figure 6, confirm that according to the transmission parameter of the embodiment of the invention method comprises:
Step S602, subscriber equipment receives the parameter indication signaling that the transmission parameter indicating device sends through Downlink Control Information;
Step S604; Subscriber equipment is according to the above-mentioned parameter indication signaling; Confirm the transmission parameter configuration, wherein, the above-mentioned parameter indication signaling is generated through transmission parameter being carried out combined coding by the transmission parameter indicating device; Wherein, transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense.
Preferably; Among the step S604; Transmission parameter is carried out combined coding to be generated said parameter indication signaling and may further include following processing: confirm layer when transmitting based on the subscriber equipment specific reference signals to the mapping mode of antenna port according to above-mentioned transmission parameter, and generate the parameter indication signaling according to this mapping mode.
Preferably, confirm that according to transmission parameter layer mapping mode to antenna port when transmitting based on the subscriber equipment specific reference signals can comprise:
Confirm the mapping mode of layer according to following formula to antenna port:
When having only a layer transmission, y
(p)(i)=x
(0)(i), wherein, x
(0)(i) be the modulation symbol of layer 0, y
(p)(i) be the data of corresponding port p after the respective layer precoding, p ∈ 0,4,5,7,8,9,10},
Be number of modulation symbols waiting for transmission on the current layer;
When number of layers greater than 1 the time, layer being mapped as to port
Wherein, x
(j)(i) be the modulation symbol of layer j,
Be corresponding port p after the respective layer precoding
jData, p
jCorresponding port is indicated by indication signaling, and o≤j≤v-1, v are number of layers,
Be number of modulation symbols waiting for transmission on the current layer.
Preferably; Can further include following processing after the step S604: the size according to the port numbers of distributing is confirmed quadrature mask despreading length, when the maximum port numbers of distributing during greater than first threshold, adopts the quadrature mask of first length; When the maximum port numbers of distributing during smaller or equal to first threshold; Adopt the quadrature mask of first length or second length, wherein, first length is greater than second length.
Preferably; Among the step S604; Transmission parameter is carried out combined coding to be generated said parameter indication signaling and can further include following processing: when having only a transmission block to enable, the new data indication bit that the transmission block of disable is corresponding is used to carry out combined coding.
Fig. 7 is a structured flowchart of confirming device according to the transmission parameter of the embodiment of the invention.As shown in Figure 7, confirm that according to the transmission parameter of the embodiment of the invention device comprises:
Corresponding to the above-mentioned parameter indicating device, the parameter indication signaling that the relevant parameters determination module sends with reception above-mentioned parameter indicating device also need be set on subscriber equipment, and finally confirm the transmission parameter configuration according to indication wherein.
Preferably, above-mentioned transmission parameter indicating device can confirm that the layer when transmitting based on the subscriber equipment specific reference signals arrives the mapping mode of antenna port according to above-mentioned transmission parameter, and generates the parameter indication signaling according to this mapping mode.
Preferably, above-mentioned transmission parameter indicating device confirms that layer mapping mode to antenna port when transmitting based on the subscriber equipment specific reference signals can comprise:
Confirm the mapping mode of layer according to following formula to antenna port:
When having only a layer transmission, y
(p)(i)=x
(0)(i), wherein, x
(0)(i) be the modulation symbol of layer 0, y
(p)(i) be the data of corresponding port p after the respective layer precoding, p ∈ 0,4,5,7,8,9,10},
Be number of modulation symbols waiting for transmission on the current layer;
When number of layers greater than 1 the time, layer being mapped as to port
Wherein, x
(j)(i) be the modulation symbol of layer j,
Be corresponding port p after the respective layer precoding
jData, p
jCorresponding port is indicated by indication signaling, and o≤j≤v-1, v are number of layers,
Be number of modulation symbols waiting for transmission on the current layer.
Preferably, as shown in Figure 8, transmission parameter confirms that device can further include according to the preferred embodiment of the invention: mask determination module 76; Be connected to parameter determination module 74; Be used for confirming quadrature mask despreading length,, adopt the quadrature mask of first length when the maximum port numbers of distributing during greater than first threshold according to the size of the maximum port numbers of distributing; When the maximum port numbers of distributing during smaller or equal to first threshold; Adopt the quadrature mask of first length or second length, wherein, first length is greater than second length.
Preferably, when having only a transmission block to enable, above-mentioned transmission parameter indicating device can the new data indication bit that the transmission block of disable is corresponding be used to carry out combined coding.
From above description; Can find out that technical scheme provided by the invention can further strengthen the MU-MIMO transmission mode, when the multi-user is transmitted; Carry out the distribution of layer more flexibly; Support simultaneously between the different nodes, the orthogonal transmission of DMRS between different nodes in heterogeneous network especially, and also the interference that helps between the different nodes suppresses.Whole proposal can realize following technique effect: existing MU-MIMO technology is strengthened, support to realize between a plurality of users under the same sub-district more demodulation pilot frequency orthogonal transmission; Support the orthogonal transmission of demodulation pilot frequency between the different nodes, can realize Interference Estimation more accurately; Support under the heterogeneous network that pilot tone orthogonal transmission more flexibly between the different nodes obtains bigger cell splitting and gains.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, and in some cases, can carry out step shown or that describe with the order that is different from here by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (20)
1. a transmission parameter indicating means is characterized in that, comprising:
Transmission parameter is carried out combined coding generate the parameter indication signaling, wherein, said transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense;
Said parameter indication signaling is sent to subscriber equipment through Downlink Control Information.
2. method according to claim 1 is characterized in that, transmission parameter is carried out combined coding generation parameter indication signaling comprise:
Confirm that according to said transmission parameter the layer when transmitting based on the subscriber equipment specific reference signals arrives the mapping mode of antenna port, and generate said parameter indication signaling according to said mapping mode.
3. method according to claim 2 is characterized in that, confirms that according to said transmission parameter layer mapping mode to antenna port when transmitting based on the subscriber equipment specific reference signals comprises:
Confirm the mapping mode of layer according to following formula to antenna port:
When having only a layer transmission, y
(p)(i)=x
(0)(i), wherein, x
(0)(i) be the modulation symbol of layer 0, y
(p)(i) be the data of corresponding port p after the respective layer precoding, p ∈ 0,4,5,7,8,9,10},
Be number of modulation symbols waiting for transmission on the current layer;
When number of layers greater than 1 the time, layer being mapped as to port
Wherein, x
(j)(i) be the modulation symbol of layer j,
Be corresponding port p after the respective layer precoding
jData, p
jCorresponding port is indicated by indication signaling, and o≤j≤v-1, v are number of layers,
Be number of modulation symbols waiting for transmission on the current layer.
4. method according to claim 3 is characterized in that, after transmission parameter being carried out combined coding generation parameter indication signaling, also comprises:
Size indication quadrature mask despreading length according to the port numbers of distributing; When the maximum port numbers of distributing during greater than first threshold; Subscriber equipment adopts the quadrature mask of first length, and when the maximum port numbers of distributing during smaller or equal to first threshold, subscriber equipment adopts the quadrature mask of first length or second length; Wherein, said first length is greater than said second length.
5. according to each described method of claim 1 to 4, it is characterized in that, transmission parameter carried out combined coding generation parameter indication signaling comprise:
When having only a transmission block to enable, the new data indication bit that the transmission block of disable is corresponding is used to carry out combined coding.
6. a transmission parameter indicating device is characterized in that, comprising:
The combined coding module is used for that transmission parameter is carried out combined coding and generates the parameter indication signaling, and wherein, said transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense;
Signaling sending module is used for said parameter indication signaling is sent to subscriber equipment through Downlink Control Information.
7. device according to claim 6 is characterized in that, said combined coding module comprises:
The signaling design cell is used for confirming that according to said transmission parameter the layer when transmitting based on the subscriber equipment specific reference signals arrives the mapping mode of antenna port, and generates said parameter indication signaling according to said mapping mode.
8. device according to claim 7 is characterized in that, said signaling design cell confirms that the layer when transmitting based on the subscriber equipment specific reference signals comprises to the method for the mapping mode of antenna port:
Confirm the mapping mode of layer according to following formula to antenna port:
When having only a layer transmission, y
(p)(i)=x
(0)(i), wherein, x
(0)(i) be the modulation symbol of layer 0, y
(p)(i) be the data of corresponding port p after the respective layer precoding, p ∈ 0,4,5,7,8,9,10},
Be number of modulation symbols waiting for transmission on the current layer;
When number of layers greater than 1 the time, layer being mapped as to port
Wherein, x
(j)(i) be the modulation symbol of layer j,
Be corresponding port p after the respective layer precoding
jData, p
jCorresponding port is indicated by indication signaling, and o≤j≤v-1, v are number of layers,
Be number of modulation symbols waiting for transmission on the current layer.
9. device according to claim 8 is characterized in that, also comprises:
The mask indicating module; Be used for indicating said quadrature mask despreading length according to the size of the port numbers of distributing, when the maximum port numbers of distributing during greater than first threshold, subscriber equipment adopts the quadrature mask of first length; When the maximum port numbers of distributing during smaller or equal to first threshold; Subscriber equipment adopts the quadrature mask of first length or second length, and wherein, said first length is greater than said second length.
10. according to each described device of claim 6 to 9, it is characterized in that said combined coding module also comprises:
Bit is reused the unit, is used for when having only a transmission block to enable, and the new data indication bit that the transmission block of disable is corresponding is used to carry out combined coding.
11. a transmission parameter is confirmed method, it is characterized in that, comprising:
Subscriber equipment receives the parameter indication signaling that the transmission parameter indicating device sends through Downlink Control Information;
Said subscriber equipment is confirmed the transmission parameter configuration according to said parameter indication signaling, wherein,
Said parameter indication signaling is generated through transmission parameter being carried out combined coding by said transmission parameter indicating device, and wherein, said transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense.
12. method according to claim 11 is characterized in that, transmission parameter is carried out combined coding generate said parameter indication signaling and comprise:
Confirm that according to said transmission parameter the layer when transmitting based on the subscriber equipment specific reference signals arrives the mapping mode of antenna port, and generate said parameter indication signaling according to said mapping mode.
13. method according to claim 12 is characterized in that, confirms that according to said transmission parameter the layer when transmitting based on the subscriber equipment specific reference signals comprises to the method for the mapping mode of antenna port:
Confirm the mapping mode of layer according to following formula to antenna port:
When having only a layer transmission, y
(p)(i)=x
(0)(i), wherein, x
(0)(i) be the modulation symbol of layer 0, y
(p)(i) be the data of corresponding port p after the respective layer precoding, p ∈ 0,4,5,7,8,9,10},
Be number of modulation symbols waiting for transmission on the current layer;
When number of layers greater than 1 the time, layer being mapped as to port
Wherein, x
(j)(i) be the modulation symbol of layer j,
Be corresponding port p after the respective layer precoding
jData, p
jCorresponding port is indicated by indication signaling, and o≤j≤v-1, v are number of layers,
Be number of modulation symbols waiting for transmission on the current layer.
14. method according to claim 13 is characterized in that, said subscriber equipment is confirmed also to comprise after the transmission parameter configuration according to said parameter indication signaling:
Size according to the port numbers of distributing is confirmed said quadrature mask despreading length; When the maximum port numbers of distributing during greater than first threshold; Adopt the quadrature mask of first length,, adopt the quadrature mask of first length or second length when the maximum port numbers of distributing during smaller or equal to first threshold; Wherein, said first length is greater than said second length.
15. according to each described method of claim 11 to 14, it is characterized in that, transmission parameter carried out combined coding generate said parameter indication signaling and comprise:
When having only a transmission block to enable, the new data indication bit that the transmission block of disable is corresponding is used to carry out combined coding.
16. a transmission parameter is confirmed device, is positioned on the subscriber equipment, it is characterized in that, comprising:
The signaling receiver module is used to receive the parameter indication signaling that the transmission parameter indicating device sends through Downlink Control Information;
The parameter determination module is used for according to said parameter indication signaling, confirms the transmission parameter configuration, wherein,
Said parameter indication signaling is generated through transmission parameter being carried out combined coding by said transmission parameter indicating device, and wherein, said transmission parameter comprises: the number of plies of transmission, scrambler sequence identity, antenna port, pilot-frequency expense.
17. device according to claim 16; It is characterized in that; Said transmission parameter indicating device confirms that according to said transmission parameter the layer when transmitting based on the subscriber equipment specific reference signals arrives the mapping mode of antenna port, and generates said parameter indication signaling according to said mapping mode.
18. device according to claim 17 is characterized in that, said transmission parameter indicating device confirms that the layer when transmitting based on the subscriber equipment specific reference signals comprises to the method for the mapping mode of antenna port:
Confirm the mapping mode of layer according to following formula to antenna port:
When having only a layer transmission, y
(p)(i)=x
(0)(i), wherein, x
(0)(i) be the modulation symbol of layer 0, y
(p)(i) be the data of corresponding port p after the respective layer precoding, p ∈ 0,4,5,7,8,9,10},
Be number of modulation symbols waiting for transmission on the current layer;
When number of layers greater than 1 the time, layer being mapped as to port
Wherein, x
(j)(i) be the modulation symbol of layer j,
Be corresponding port p after the respective layer precoding
jData, p
jCorresponding port is indicated by indication signaling, and o≤j≤v-1, v are number of layers,
Be number of modulation symbols waiting for transmission on the current layer.
19. device according to claim 18 is characterized in that, said transmission parameter confirms that device also comprises:
The mask determination module; Be used for confirming said quadrature mask despreading length,, adopt the quadrature mask of first length when the maximum port numbers of distributing during greater than first threshold according to the size of the port numbers of distributing; When the maximum port numbers of distributing during smaller or equal to first threshold; Adopt the quadrature mask of first length or second length, wherein, said first length is greater than said second length.
20., it is characterized in that when having only a transmission block to enable, the new data indication bit that said transmission parameter indicating device is corresponding with the transmission block of disable is used to carry out combined coding according to each described device of claim 16 to 18.
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|---|---|---|---|
| CN201110118555.2A CN102781098B (en) | 2011-05-09 | Parameter indicating means, device and parameter determination method, device | |
| PCT/CN2012/075188 WO2012152214A1 (en) | 2011-05-09 | 2012-05-08 | Transmission parameter indication/transmission parameter determination method and device |
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|---|---|---|---|
| CN201110118555.2A CN102781098B (en) | 2011-05-09 | Parameter indicating means, device and parameter determination method, device |
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| CN102781098A true CN102781098A (en) | 2012-11-14 |
| CN102781098B CN102781098B (en) | 2016-12-14 |
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