CN103259635A - Method and device for generating DMRS scramble sequence - Google Patents
Method and device for generating DMRS scramble sequence Download PDFInfo
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- CN103259635A CN103259635A CN2012100343337A CN201210034333A CN103259635A CN 103259635 A CN103259635 A CN 103259635A CN 2012100343337 A CN2012100343337 A CN 2012100343337A CN 201210034333 A CN201210034333 A CN 201210034333A CN 103259635 A CN103259635 A CN 103259635A
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Abstract
The invention relates to the field of communication, in particular to a method and device for generating a DMRS scramble sequence. The method includes the steps that a first DMRS scramble initialization parameter X and a second DMRS scramble initialization parameter Y which are needed in the process of generating the DMRS scramble sequence are determined by a base station according to current PDSCH transmission relative parameters, then the corresponding DMRS scramble sequence is generated according to the two parameters, and correspondingly the corresponding DMRS scramble sequence can be generated by a terminal in the same method. Therefore, the DMRS scramble sequence generated by multiplex UE can be switched dynamically and freely between the same sequence and different sequences according to differences of the PDSCH transmission relative parameters, consequently, orthogonality use demands of signals are met, and signal interference between UE is reduced.
Description
Technical field
The present invention relates to the communications field, particularly a kind of generation method and device of DMRS scrambler sequence.
Background technology
At LTE-A (Long Term Evolution-Advanced, long-term evolution upgrading) uplink reference signals that transmits in the system descending transmission mainly comprises DMRS (Demodulation Reference Symbol, demodulation reference mark) and SRS (Sounding Reference Signal, survey and use reference signal), the DMRS signal is mainly used in (the Physical Downlink Shared Channel to PDSCH, Physical Downlink Shared Channel) carries out channel estimating and synchronous, so that receiving terminal success demodulating data.The scrambler sequence of DMRS signal (be called for short DMRS scrambler sequence) all is that the residential quarter ID according to Serving cell carries out initial configuration, and the initial configuration mode of the DMRS scrambler sequence in the different districts generally all is different.At CoMP (Coordinated Multiple Point transmission, cooperative multipoint transmission) in the system, in order to improve spectrum efficiency, can carry out MU-MIMO (Multiple-user MIMO, multi-user multi-antenna) handles, the base station that is a plurality of residential quarters is given a plurality of UE transmission data simultaneously, perhaps receives the transmission data of a plurality of UE simultaneously, and these UE take identical physical resource and carry out multiplexing.
In present LTE-A system, descending DMRS scrambler sequence can be from a plurality of port transmission of network side, and generally, network side can send DMRS scrambler sequence (being called prot7, prot8......port14) by 8 ports.UE according to the channel estimating that obtains based on the DMRS scrambler sequence to carry out the detection of data.The DMRS scrambler sequence is generated by following formula:
Wherein,
Be RB (Resource Block) quantity of descending maximum, c (i) is pseudo random sequence, and c (i) can carry out initialization with following formula one:
Wherein, n
sBe time-gap number,
Be the residential quarter ID of the Serving cell of UE, n
SCIDBe the ID of the scramble sequence that adopts of UE, value is 0 or 1, generally, and n when adopting port7 and/or port8 (port 7 and/or port 8) only
SCIDValue can be 0 or 1, under other situations the acquiescence value be 0.
When carrying out transmitting with residential quarter MU-MIMO, UE can have two kinds of different DMRS port arrangement and two kinds of different scramble sequence ID (SCID) configuration, therefore can support 4 layers at most based on the multiplexing transmission of DMRS.At this moment, different UE has four kinds of DMRS configurations at most, is respectively:
1) the DMRS configuration 1: antenna port=7, SCID=0;
2) the DMRS configuration 2: antenna port=8, SCID=0;
3) the DMRS configuration 3: antenna port=7, SCID=1;
4) the DMRS configuration 4: antenna port=8, SCID=1.
If 4 UE carry out MU-MIMO, then can adopt above configuration 1-4 respectively; If 2 UE carry out MU-MIMO and each UE transmission 2 streams (namely Chuan Shu the number of plies is 2), then two UE use configuration 1-2 and 3-4 respectively.At PDCCH (Physical Downlink Control Channel, when carrying out descending scheduling Physical Downlink Control Channel), the base station is at corresponding DCI (Downlink Control Information, Downlink Control Information) adopts the number of plies of the current transmission of 3 bit joint instructions UE in, used DMRS port and used SCID, wherein the part indication is used for the transmission of MU-MIMO.For example, the value of the 3 bit DCI that issue of base station and its corresponding deploy content can be shown in tables 0:
Table 0
The CoMP technology typically refers to the cooperation between a plurality of transmission points that separate on the geographical position.In general, a plurality of transmission points are base stations of different districts, perhaps a plurality of RRH of same cell base station control.By the cooperation transmission between a plurality of transmission points, can effectively reduce the interference between the different transmission points, improve the particularly throughput of cell edge UE of UE.For a plurality of RRH that belong in the Macro zone (macrocell), can be configured to identical Cell ID (residential quarter ID), also can be configured to different Cell ID and form a plurality of residential quarters.
A plurality of transmission points (residential quarter) in the collaboration region can be given one or more UE transmission data simultaneously, to obtain the gain of Combined Treatment and MU-MIMO.If same resource is only given UE transmission data, then be called SU-JT (single user's joint transmission), as shown in Figure 1; If same resource is given a plurality of UE transmission data simultaneously, then be called MU-JT (multi-user association transmission), as shown in Figure 2.
Situation for MU-JT, if a plurality of base stations belong to into different residential quarters, and multiplexing UE belongs to different residential quarters, for example, UE1 shown in Figure 2 belongs to Cell 1, and UE3 belongs to Cell 3, when then a base station sends the DMRS scrambler sequence for simultaneously a plurality of multiplexing UE, because adopt different DMRS scrambler sequence initial methods at different UEs, therefore, the base station can't guarantee the DMRS scrambler sequence orthogonality each other of each UE by port.Phase mutual interference between the multiplexing UE at this moment is very big, can influence the demodulation performance of its data greatly, thereby reduces transmission rate.Therefore, be necessary to allow this moment the multiplexing UE that carries out the MU-JT transmission adopt identical DMRS scrambler sequence, when to be the base station at different UEs generate corresponding DMRS scrambler sequence, employed pseudo random sequence of carrying out scrambling adopts identical initialization value, and no matter whether above-mentioned each UE belongs to same residential quarter.
On the other hand, if the Cell ID of a plurality of base stations in the above situation is identical, then scrambler sequence is also identical in the residential quarter, and the DMRS scrambler sequence that different UEs generates is also identical.In theory, then very low near the channel relevancy between the UE of each base station if this moment, the space isolation between a plurality of base stations was better, can multiplexing identical DMRS port to increase the capacity of DMRS.Yet, in the practical application, space isolation between the base station is difficult to accurately control, if the space isolation between the base station is undesirable, so this moment, because each UE adopts identical DMRS scrambler sequence, then still can there be bigger interference between each UE, this can influence the demodulation performance of its data greatly, thereby reduces transmission rate.Be necessary their scrambler sequence is made into different this moment, to reduce the interference between the UE that adopts identical DMRS configuration.
At the problems referred to above, under the prior art, the UE that can dispose different districts calculates DMRS scrambler sequence initial value according to following several schemes:
A, the following formula of employing calculate DMRS scrambler sequence initial value:
Wherein, X is that the base station disposes the parameter to UE, if parameter X and the n of two UE configurations
SCIDIdentical, then two UE can generate identical DMRS scrambler sequence, thereby realize the orthogonal multiplex of DMRS port; If the X difference of two UE configurations, then two UE can generate different DMRS scrambler sequence.
B, the following formula of employing calculate DMRS scrambler sequence initial value:
Wherein, Y is that the base station disposes the parameter to UE, or the UE_ID of UE, if the parameter Y differences of two UE configuration, even two UE then in the same residential quarter also can generate different DMRS scrambler sequence, thus the interference between the minimizing DMRS.
C, configuration UE are calculated as follows DMRS scrambler initial value:
Wherein, X and Y are that the base station disposes the parameter to UE, and perhaps, X is that the base station disposes the parameter to UE, and Y is the UE_ID of UE.If two UE have disposed identical X and identical Y, then two UE can generate identical DMRS scrambler sequence, thereby realize the orthogonal multiplex of DMRS port; If X is different with any parameter among the Y, then two UE can generate different DMRS scrambler sequence, thereby reduce the interference between the DMRS.
At present, when adopting such scheme B, can not make the UE of different districts generate identical DMRS scrambler sequence; When operational version A, in case two UE have disposed identical X, then the DMRS scrambler sequence of these two UE is identical always, for obtaining certain interference randomization effect, need to give a plurality of X candidate values of terminal configuration, and in DCI, dynamically the concrete value of X is indicated, its expense can be bigger; And during operational version C, in case disposed different Y for two UE, then these two UE may generate identical DMRS scrambler sequence hardly, are difficult to realize the orthogonal multiplex of DMRS between the user.
Obviously, adopt existing DMRS scrambler sequence to generate scheme, two multiplexing UE only can satisfy " generating identical DMRS scrambler sequence " and one of " generating different DRMS scrambler sequence " these two targets, can not realize the flexible switching of two states, obviously, along with the variation of application scenarios, this mode can not be satisfied with the user demand of UE, need the new DMRS scrambler sequence of design to generate scheme.
Summary of the invention
The embodiment of the invention provides a kind of generation method and device of DMRS scrambler sequence, and in order to realizing the dynamic switching of DMRS scrambler sequence generating mode, thereby the signal that reduces between the UE disturbs.
The concrete technical scheme that the embodiment of the invention provides is as follows:
A kind of generation method of DMRS scrambler sequence is characterized in that, comprising:
Determine a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
According to PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Generate corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Generate corresponding DRMS scrambler sequence according to the DMRS scrambler initial value that obtains, and adopt this DRMS scrambler sequence that terminal is sent DMRS.
A kind of generation method of DMRS scrambler sequence comprises:
Determine a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
According to PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Generate corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Generate corresponding DMRS scrambler sequence according to the DMRS scrambler initial value that obtains, and receive the DMRS that network side sends according to this DMRS scrambler sequence.
A kind of generating apparatus of DMRS scrambler sequence comprises:
First determining unit is used for determining a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Second determining unit, be used for determining a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y according to Physical Downlink Shared Channel PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Generation unit is used for generating corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Communication unit is used for generating corresponding DRMS scrambler sequence according to the DMRS scrambler initial value that obtains, and adopts this DRMS scrambler sequence that terminal is sent DMRS.
A kind of generating apparatus of DMRS scrambler sequence comprises:
First determining unit is used for determining a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Second determining unit, be used for determining a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y according to Physical Downlink Shared Channel PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Generation unit is used for generating corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Communication unit is used for generating corresponding DMRS scrambler sequence according to the DMRS scrambler initial value that obtains, and receives the DMRS that network side sends according to this DMRS scrambler sequence.
In the embodiment of the invention, redesigned a kind of generation method of DMRS scrambler sequence, adopt this method, needs used when the base station can be determined to generate the DMRS scrambler sequence according to current PDSCH transmission relevant parameter a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, and generate corresponding DMRS scrambler sequence according to these two parameters, accordingly, terminal also can be adopted and be generated corresponding DMRS scrambler sequence in a like fashion, like this, the DMRS scrambler sequence that makes multiplexing UE generate, can transmit the difference of relevant parameter according to PDSHC, between identical sequence and different sequence, dynamically switch neatly, thereby satisfy the user demand of signal in orthogonal, the signal that has reduced between the UE disturbs; On the other hand, the base station can with the make an appointment generation method of an above-mentioned DMRS scrambler initiation parameter X and the second scrambler initiation parameter Y of terminal, and will notify UE by DCI based on the mode of these two calculation of parameter DMRS scrambler sequence, like this, complexity and expense that the DCI that only notifies account form effectively to reduce designs, thereby the mitigation system load, the elevator system overall performance.
Description of drawings
Fig. 1 is prior art user's joint transmission schematic diagram that places an order;
Fig. 2 is multi-user association transmission schematic diagram under the prior art;
Fig. 3 is that network side generates DMRS scrambler sequence flow chart in the embodiment of the invention;
Fig. 4 is that end side generates DMRS scrambler sequence flow chart in the embodiment of the invention;
Fig. 5 is base station functions structural representation in the embodiment of the invention;
Fig. 6 is UE illustrative view of functional configuration in the embodiment of the invention.
Embodiment
In order to realize the dynamic switching of DMRS scrambler sequence generating mode, thereby the signal that reduces between the UE disturbs.In the embodiment of the invention, relevant parameter is transmitted according to PDSCH in the base station, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, and generate corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, and generate corresponding DRMS scrambler sequence according to the DMRS scrambler initial value that obtains, and adopt this DRMS scrambler sequence that terminal is sent demodulation reference mark DMRS, on the other hand, terminal also adopts corresponding mode to determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, and according to the notice of network side based on PDSH transmission relevant parameter, generate corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, generate corresponding DMRS scrambler sequence according to the DMRS scrambler initial value that obtains, and receive the demodulation reference mark DMRS that network side sends according to this DMRS scrambler sequence.
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
Consult shown in Figure 3ly, in the embodiment of the invention, it is as follows that network side generates the detailed process of DMRS scrambler sequence:
Step 300: a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B are determined in the base station.
In the embodiment of the invention, when a DMRS scrambler initiation parameter set A (hereinafter to be referred as set A) is determined in the base station, can adopt following any one mode:
A1, base station choose one or more parameter and form set A from first parameter sets of being made of limited integer that pre-defines.
Wherein, can comprise the residential quarter ID of the Serving cell of UE in the set A, and the residential quarter ID of the neighbor cell of UE, the number of the parameter that records in the set A is N, as, A={a1, a2, ..., aN}, N are predefined determined value, perhaps, the value of N also can be selected voluntarily by the base station, if the base station value of N voluntarily, then the base station need be notified to UE with the value of N.
For example, first parameter sets can for 0,1 ..., 503}.First parameter sets usually can all set in advance in network side and end side and finish, and the base station can directly obtain use.
A2, base station at this moment, can only comprise a set element in the set A according to choosing the Serving cell ID of UE or the device id of UE (being UE_ID) composition set A with the mode of end side agreement.
In the embodiment of the invention, when the 2nd DMRS scrambler initiation parameter set B (hereinafter to be referred as set B) is determined in the base station, can adopt following any one mode:
B1, base station according to the mode of end side agreement choose a certain preset parameter in the device id (being UE_ID) of UE or the above-mentioned set A (as, a1) form set B; At this moment, can only comprise a set element in the set B.
B2, base station choose one or more parameter and form set B from second parameter sets of being made of limited integer that pre-defines.
Wherein, can comprise the residential quarter ID of the Serving cell of UE in the set B, and the residential quarter ID of the neighbor cell of UE, the number of the parameter that records in the set B is M, as, B={b1, b2 ..., bM}; The M value is predefined determined value, and perhaps, the value of M also can be selected voluntarily by the base station, if the base station value of M voluntarily, then the base station need be notified to UE with the value of M.。For example, second parameter sets can for 0,1 ..., 1024}.Second parameter sets usually can all set in advance in network side and end side and finish, and the base station can directly obtain use.
Step 310: a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y are determined according to PDSCH transmission relevant parameter and an above-mentioned DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B in the base station.
In the present embodiment, PDSCH transmission relevant parameter can be that number of codewords, the transmission number of plies, DMRS port arrangement, the DMRS scrambling ID of PDSCH transfer of data (is n
SCID), PDSCH users multiplexing number and PDSCH transmit or combination in any in the required DMRS sequence characteristic.The base station can select a DMRS scrambler initiation parameter X (abbreviation parameter X) according to set A based on these PDSCH transmission relevant parameters, selects the 2nd DMRS scrambler initiation parameter Y (being called for short parameter Y) according to set B.
For example: set A is { 103,117}, a parameter is chosen as parameter X according to above-mentioned PDSCH transmission relevant parameter in the base station from set A, this parameter X can be the cell ID ID of the Serving cell of UE, can be and the equal different residential quarter ID of the residential quarter ID of UE neighbor cell, can also be the residential quarter ID of the arbitrary neighbor cell except the Serving cell of UE.
Again for example, it is certain pre-conditioned that the base station judges whether PDSCH data flow transmitted number satisfies, if, then parameter Y is defined as preset value, otherwise, from set B, select parameter Y.
Again for example, it is pre-conditioned accordingly that the base station judges whether PDSCH data flow transmitted number and number of codewords all satisfy, if, then parameter Y is defined as preset value, otherwise, from set B, select parameter Y.As, the PDSCH of 1 layer of single codeword transmit seasonal Y=0 or 1, the PDSCH that selects Y, 2 layers of dicode word during more than or equal to 2 layers single codeword PDSCH transmission from set B transmits seasonal Y=0 or 1, select Y during more than or equal to 2 layers dicode words transmission from set B.
Again for example, it is certain pre-conditioned that the base station judges whether the required DMRS sequence characteristic of PDSCH transmission satisfies, if then parameter Y is defined as preset value, otherwise, from set B, select parameter Y.As, the base station judges that the DMRS sequence characteristic of PDSCH transmission be the DMRS sequence maintenance quadrature with other UE, then the base station is defined as preset value 0 or 1 with parameter Y, if the base station is judged the DMRS sequence characteristic of PDSCH transmission and is and the DMRS sequence maintenance interference randomization of other UE, then select parameter Y from set B.
Again for example, it is certain pre-conditioned that the base station judges whether the users multiplexing number of PDSCH transmission satisfies, if, then parameter Y is defined as preset value, otherwise, from set B, select parameter Y.As, if the base station judges that the users multiplexing number of PDSCH transmission is 2, then parameter Y is defined as preset value 0 or 1, if judging the users multiplexing number of PDSCH transmission, the base station greater than 2, then from set B, selects parameter Y.The users multiplexing number of PDSCH transmission refers on identical running time-frequency resource the UE number of scheduling simultaneously.
In the process of execution in step 310, UE can be notified by high-level signaling with set A in the base station, and perhaps, acquiescence UE adopts with the network side stipulated form and confirms set A; And, notify UE with set B by high-level signaling, perhaps, acquiescence UE adopts with the network side stipulated form and confirms set B.
Like this, UE can transmit relevant parameter according to PDSCH, and parameter X is determined in choosing based on set A, and determines parameter Y based on set B; Determine set A and set B if base station side acquiescence UE adopts with the network side stipulated form, then UE need not be notified in the base station.
On the other hand, in the process of execution in step 310, the base station also can with the indication information of fixed parameter X and parameter Y (as, the index value of parameter X in set A, and the index value of parameter Y in set B or the value of parameter Y) after a kind of or combination in any in the number of codewords, the transmission number of plies, DMRS port arrangement and DMRS scrambling ID that adopt with the PDSCH transfer of data carries out combined coding, issue UE by DCI.
Like this, UE can directly obtain parameter X and the parameter Y of network side indication according to DCI.
Step 320: the base station generates corresponding DMRS scrambler initial value based on the DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y that determine.
DMRS scrambler initial value computational methods (can select following any one formula for use):
Step 330: the base station generates corresponding DRMS scrambler sequence according to the DMRS scrambler initial value that obtains, and adopts this DRMS scrambler sequence that UE is sent DMRS.
Based on above-described embodiment, to consult shown in Figure 4ly, in the embodiment of the invention, it is as follows that UE generates the detailed process of DMRS scrambler sequence:
Step 400:UE determines a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B.
In the present embodiment, when UE determines set A, can adopt following any one method:
C1, UE are according to choosing the Serving cell ID of UE or the device id of UE (being UE_ID) composition set A with the mode of network side agreement; Concrete mode is identical with base station side, does not repeat them here.
C2, UE obtain set A according to the notice of network side high-level signaling.
And in the present embodiment, when UE determines set B, can adopt following any one method:
D1, UE form set B according to choosing in the device id (UE_ID) of UE or the set A a certain preset parameter with the mode of network side agreement; Concrete mode is identical with base station side, does not repeat them here.
D2, UE obtain set B according to the notice of network side high-level signaling.
Step 410:UE determines a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y according to PDSCH transmission relevant parameter and an above-mentioned DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B.
UE can transmit relevant parameter according to PDSCH, as number of codewords, the transmission number of plies, DMRS port arrangement, the DMRS scrambling ID based on the PDSCH transfer of data, PDSCH users multiplexing number and PDSCH transmit or combination in any in the required DMRS sequence characteristic, according to the true parameter X of set A, and determine parameter Y according to set B.Wherein, when definite parameter Y, UE can judge number of codewords, the transmission number of plies, DMRS port arrangement, the DMRS scrambling ID of above-mentioned PDSCH transfer of data, whether in the required DMRS sequence characteristic of PDSCH users multiplexing number and PDSCH transmission one or combination in any satisfy pre-conditioned, if then parameter Y is defined as preset value; Otherwise, from set B, select parameter Y; Concrete judgment mode is identical with base station side, does not repeat them here.Perhaps, UE can receive the DCI that network side sends, a kind of or combination in any of above-mentioned each PDCSH transmission relevant parameter and the indication information combined coding of parameter X and parameter Y among this DCI; UE can determine parameter X according to this indication information in set A, and according to this indication information directly or in set B, determine parameter Y.
For example, UE can directly determine parameter X according to set A, as, include only 1 element a1, then X=a1 in the set A; Also can determine X according to the set A of network side transmission and the indication information among the DCI.On the other hand, UE can directly determine parameter Y according to set B, for example includes only 1 element b1 in the set B, and then Y=b1 also can determine Y according to the set B of network side transmission and the indication information among the DCI.
Step 420:UE generates corresponding DMRS scrambler initial value based on an above-mentioned DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y.
DMRS scrambler initial value computational methods (can select following any one formula for use):
Step 430:UE generates corresponding DMRS scrambler sequence according to the DMRS scrambler initial value that obtains, and receives the DMRS that network side sends according to this DMRS scrambler sequence.
With a plurality of concrete application scenarioss above-mentioned implementing procedure is carried out further introducing in detail below.
First kind of scene is:
The set A size is N=2, A={ID1, ID2}, the base station is notified to UE with set A by high-level signaling, and by DCI to the index information of UE indication parameter X in set A, wherein, the index information of parameter X (is n with DMRS port and DMRS scrambling ID in DCI
SCID) carry out combined coding; Set B then can be determined B={UE_ID} or B={n respectively by base station and UE according to the mode of making an appointment
RNTI, perhaps, set B also can be disposed to UE by high-level signaling by the base station.Set B only comprises an element in the present embodiment, might as well remember that the element in the set B is b1.So, the base station can be with parameter X, parameter Y in DCI by with DMRS port, n
SCIDCarry out combined coding with number of data streams and be notified to UE.Information behind the combined coding takies 4 bits in DCI, be 1 and 2 to be 16 states of can indicating respectively in the PDSCH transmitted codewords, and the concrete implication of each state is consulted shown in table 1 or the table 2:
Table 1
Table 2
The DMRS initial value calculates and can adopt
Perhaps
In above-described embodiment, for the MU-MIMO transmission that PDSCH data flow transmitted number is 1 or 2 (namely 1 layers or 2 layers), Y=0 can effectively guarantee the orthogonality between the pilot tone of multiplexing UE, thereby guarantees the performance of MU-MIMO; And for PDSCH data flow transmitted number greater than for the SU-MIMO of 2 (namely greater than the 2 layers) transmission, Y=b1 can make the DMRS scrambler sequence difference of different UEs, thereby plays the effect of interference randomization.
Second kind of scene is:
The base station can be notified to UE by high-level signaling with set A, and perhaps, set A also can be definite according to the mode of making an appointment respectively by base station and UE, as, determine that set A is the Serving cell ID of UE.Set A only comprises an element in the present embodiment, so UE can directly determine parameter X according to set A.Set B then can be determined B={UE_ID} or B={n respectively by base station and UE according to the mode of making an appointment
RNTI, perhaps, set B also can be disposed to UE by high-level signaling by the base station.Set B only comprises an element in the present embodiment, might as well remember that the element in the set B is b1.So, the base station can with parameter Y in DCI by with DMRS port, n
SCIDCarry out combined coding with number of data streams and be notified to UE.Information behind the combined coding takies 3 bits in DCI, be 1 and 2 to be 8 states of can indicating respectively in the PDSCH transmitted codewords, and the concrete implication of each state is consulted shown in the table 3:
Table 3
The DMRS initial value calculates and can adopt
Perhaps
In the present embodiment, for the MU-MIMO transmission of 1 layer or 2 layers, Y=0 can effectively guarantee the orthogonality between the pilot tone of multiplexing UE, thereby guarantees the performance of MU-MIMO; And for for 2 layers SU-MIMO transmission, Y=b1 can make the DMRS scrambler sequence difference of different UEs, thereby plays the effect of interference randomization.
The third scene is:
The set A size is N=2, A={ID1, ID2}, the base station is notified to UE with set A by high-level signaling, and by DCI to the index information of UE indication parameter X in set A, wherein, the index information of parameter X (is n with DMRS port and DMRS scrambling ID in DCI
SCID) carry out combined coding; Set B then can be determined B={UE_ID} or B={n respectively by base station and UE according to the mode of making an appointment
RNTI, perhaps, set B also can be disposed to UE by high-level signaling by the base station.Set B only comprises an element in the present embodiment, might as well remember that the element in the set B is b1.So, the base station can be with parameter X, and parameter Y is notified to UE by carrying out combined coding with DMRS port and number of data streams information in DCI.Information behind the combined coding takies 4 bits in DCI, be 1 and 2 to be 16 states of can indicating respectively in the PDSCH transmitted codewords, shown in the concrete implication parameter list 4 of each state:
Table 4:
The DMRS initial value calculates and can adopt
Perhaps
The 4th kind of scene is:
The base station can be notified to UE by high-level signaling with set A, and perhaps, set A also can be definite according to the mode of making an appointment respectively by base station and UE, as, determine that set A is the Serving cell ID of UE.Set A only comprises an element in the present embodiment, so UE can directly determine parameter X according to set A.Set B then can be determined B={UE_ID} or B={n respectively by base station and UE according to the mode of making an appointment
RNTI, perhaps, set B also can be disposed to UE by high-level signaling by the base station.Set B only comprises an element in the present embodiment, might as well remember that the element in the set B is b1.So, the base station can with parameter Y in DCI by with DMRS port, n
SCIDCarry out combined coding with number of data streams and be notified to UE.Information behind the combined coding takies 3 bits in DCI, be 1 and 2 to be 8 states of can indicating respectively in the PDSCH transmitted codewords, and the concrete implication of each state is specifically consulted shown in table 5 and the table 6:
Table 5
Table 6
The DMRS initial value calculates and can adopt
Perhaps
The difference of above-mentioned table 5 and table 6 is, has removed (1 layer, port8, method 2) this option in the table 6, this be consider (1 layer, port8, method 2) and (1 layer, port7, method 2) in not what difference of transfer of data, therefore can economize out a state, reserve for other use.
The 5th kind of scene is:
The set A size is N=2, A={ID1, ID2}, the base station is notified to UE with set A by high-level signaling, and by DCI to the index information of UE indication parameter X in set A, wherein, the index information of parameter X (is n with DMRS port and DMRS scrambling ID in DCI
SCID) carry out combined coding; Set B then can be determined B={UE_ID} or B={n respectively by base station and UE according to the mode of making an appointment
RNTI, perhaps, set B also can be disposed to UE by high-level signaling by the base station.Set B only comprises an element in the present embodiment, might as well remember that the element in the set B is b1.So, the base station can be with parameter X, and parameter Y is notified to UE by carrying out combined coding with DMRS port and number of data streams information in DCI.Information behind the combined coding takies 3 bits in DCI, be 1 and 2 to be to indicate 8 states, the concrete implication of each state to consult shown in the table 7-table 11 respectively in the PDSCH transmitted codewords:
Table 7
Wherein, preferable, DMRS scrambler initial value computational methods are:
Table 8
Wherein, preferable, DMRS scrambler initial value computational methods are not for (to have n in the table 8
SCIDClauses and subclauses, the acquiescence n
SCID=0):
Table 9
Wherein, DMRS scrambler initial value computational methods are: (do not have n in the table 9
SCIDClauses and subclauses, the acquiescence n
SCID=0):
Table 10
Wherein, DMRS scrambler initial value computational methods are: (do not have n in the table 10
SCIDClauses and subclauses, the acquiescence n
SCID=0):
Table 11
Wherein, DMRS scrambler initial value computational methods are:
Based on above-described embodiment, consult Fig. 5 and shown in Figure 6, in the embodiment of the invention,
The base station comprises first determining unit 50, second determining unit 51, generation unit 52 and communication unit 53, wherein,
First determining unit 50 is used for determining a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Second determining unit 51 is used for determining a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y according to PDSCH transmission relevant parameter and a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Generation unit 52 is used for generating corresponding DMRS scrambler initial value based on the DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y that determine;
Communication unit 53 is used for generating corresponding DRMS scrambler sequence according to the DMRS scrambler initial value that obtains, and adopts this DRMS scrambler sequence that terminal is sent DMRS.
UE comprises first determining unit 60, second determining unit 61, generation unit 62 and communication unit 63, wherein,
First determining unit 60 is used for determining a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Second determining unit 61 is used for determining a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y according to road PDSCH transmission relevant parameter and a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Generation unit 62 is used for generating corresponding DMRS scrambler initial value based on the DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y that determine;
Communication unit 63 is used for generating corresponding DMRS scrambler sequence according to the DMRS scrambler initial value that obtains, and receives the DMRS that network side sends according to this DMRS scrambler sequence.
In sum, in the embodiment of the invention, redesigned a kind of generation method of DMRS scrambler sequence, adopt this method, needs used when the base station can be determined to generate the DMRS scrambler sequence according to current PDSCH transmission relevant parameter a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, and generate corresponding DMRS scrambler sequence according to these two parameters, accordingly, terminal also can be adopted and be generated corresponding DMRS scrambler sequence in a like fashion, like this, the DMRS scrambler sequence that makes multiplexing UE generate, can transmit the difference of relevant parameter according to PDSHC, dynamically switch between identical sequence and different sequence neatly, thereby satisfy the user demand of signal in orthogonal, the signal that has reduced between the UE disturbs; On the other hand, the base station can with the make an appointment generation method of an above-mentioned DMRS scrambler initiation parameter X and the second scrambler initiation parameter Y of terminal, and will notify UE by DCI based on the mode of these two calculation of parameter DMRS scrambler sequence, like this, complexity and expense that the DCI that only notifies account form effectively to reduce designs, thereby the mitigation system load, the elevator system overall performance.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (28)
1. the generation method of a demodulation reference mark DMRS scrambler sequence is characterized in that, comprising:
Determine a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
According to Physical Downlink Shared Channel PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Generate corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Generate corresponding DRMS scrambler sequence according to the DMRS scrambler initial value that obtains, and adopt this DRMS scrambler sequence that terminal is sent DMRS.
2. the method for claim 1 is characterized in that, determines a DMRS scrambler initiation parameter set A, comprising:
From first parameter sets of being formed by limited integer that pre-defines, choose one or more parameter and form the described first scrambler initiation parameter set A;
Perhaps,
According to choosing the Serving cell sign ID of terminal with the mode of end side agreement or the device id of terminal is formed the described first scrambler initiation parameter set A.
3. the method for claim 1 is characterized in that, determines the 2nd DMRS scrambler initiation parameter set B, comprising:
Form described the 2nd DMRS scrambler initiation parameter set B according to choosing in the device id of terminal or the described DMRS scrambler initiation parameter set A a certain preset parameter with the mode of end side agreement;
Perhaps;
From second parameter sets of being formed by limited integer that pre-defines, choose one or more parameter and form the described second scrambler initiation parameter set B.
4. the method for claim 1, it is characterized in that, according to PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, comprising:
Number of codewords, the transmission number of plies, DMRS port arrangement, DMRS scrambling ID based on the PDSCH transfer of data, PDSCH users multiplexing number and PDSCH transmit or combination in any in the required DMRS sequence characteristic, determine a DMRS scrambler initiation parameter X according to a DMRS scrambler initiation parameter set A, and determine the 2nd DMRS scrambler initiation parameter Y according to the 2nd DMRS scrambler initiation parameter set B.
5. method as claimed in claim 4, it is characterized in that, number of codewords, the transmission number of plies, DMRS port arrangement, DMRS scrambling ID based on the PDSCH transfer of data, PDSCH users multiplexing number and PDSCH transmit or combination in any in the required DMRS sequence characteristic, according to the 2nd DMRS scrambler initiation parameter set B, determine the 2nd DMRS scrambler initiation parameter Y, comprise;
Judge number of codewords, the transmission number of plies, DMRS port arrangement, the DMRS scrambling ID of described PDSCH transfer of data, whether in the required DMRS sequence characteristic of PDSCH users multiplexing number and PDSCH transmission one or combination in any satisfy pre-conditioned, if then described the 2nd DMRS scrambler initiation parameter Y is defined as preset value; Otherwise, from described the 2nd DMRS scrambler initiation parameter set B, select the 2nd DMRS scrambler initiation parameter Y.
6. as each described method of claim 1-5, it is characterized in that, determine a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, comprising:
Notify terminal with a described DMRS scrambler initiation parameter set A by high-level signaling, perhaps, the acquiescence terminal adopts with the network side stipulated form confirms a described DMRS scrambler initiation parameter set A
Notify terminal with described the 2nd DMRS scrambler initiation parameter set B by high-level signaling, perhaps, the acquiescence terminal adopts with the network side stipulated form confirms described the 2nd DMRS scrambler initiation parameter set B.
7. as each described method of claim 1-5, it is characterized in that, after determining a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, after a kind of or combination in any among the transmission number of plies, DMRS port arrangement and the DMRS scrambling ID of the indication information of the DMRS scrambler initiation parameter X that determines and the 2nd DMRS scrambler initiation parameter Y and the employing of PDSCH transfer of data carried out combined coding, DCI issued terminal by Downlink Control Information.
8. method as claimed in claim 7, it is characterized in that, if set A is A={ID1, ID2}, set B is B={b1}, then the information behind the described combined coding takies 3 bits in DCI, and the number of codewords of PDSCH transmission is 1 and 8 states of can encoding respectively in 2 o'clock, and the concrete implication of each state is:
9. the generation method of a demodulation reference mark DMRS scrambler sequence is characterized in that, comprising:
Determine a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
According to Physical Downlink Shared Channel PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Generate corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Generate corresponding DMRS scrambler sequence according to the DMRS scrambler initial value that obtains, and receive the DMRS that network side sends according to this DMRS scrambler sequence.
10. method as claimed in claim 9 is characterized in that, determines a DMRS scrambler initiation parameter set A, comprising:
According to choosing the Serving cell sign ID of terminal with the mode of network side agreement or the device id of terminal is formed the described first scrambler initiation parameter set A;
Perhaps,
Receive network side by a described DMRS scrambler initiation parameter set A of high-level signaling notice.
11. method as claimed in claim 9 is characterized in that, determines the 2nd DMRS scrambler initiation parameter set B, comprising:
Form described the 2nd DMRS scrambler initiation parameter set B according to choosing in the device id of terminal or the described DMRS scrambler initiation parameter set A a certain preset parameter with the mode of network side agreement;
Perhaps,
Receive network side by described the 2nd DMRS scrambler initiation parameter set B of high-level signaling notice.
12. as claim 9,10 or 11 described methods, it is characterized in that, according to PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, comprising:
Number of codewords, the transmission number of plies, DMRS port arrangement, DMRS scrambling ID based on the PDSCH transfer of data, PDSCH users multiplexing number and PDSCH transmit or combination in any in the required DMRS sequence characteristic, determine a DMRS scrambler initiation parameter X according to a DMRS scrambler initiation parameter set A, and determine the 2nd DMRS scrambler initiation parameter Y according to the 2nd DMRS scrambler initiation parameter set B.
13. method as claimed in claim 12, it is characterized in that, number of codewords, the transmission number of plies, DMRS port arrangement, DMRS scrambling ID based on the PDSCH transfer of data, PDSCH users multiplexing number and PDSCH transmit or combination in any in the required DMRS sequence characteristic, according to the 2nd DMRS scrambler initiation parameter set B, determine the 2nd DMRS scrambler initiation parameter Y, comprise;
Judge number of codewords, the transmission number of plies, DMRS port arrangement, the DMRS scrambling ID of described PDSCH transfer of data, whether in the required DMRS sequence characteristic of PDSCH users multiplexing number and PDSCH transmission one or combination in any satisfy pre-conditioned, if then described the 2nd DMRS scrambler initiation parameter Y is defined as preset value; Otherwise, from described the 2nd DMRS scrambler initiation parameter set B, select the 2nd DMRS scrambler initiation parameter Y.
14. as claim 9,10 or 11 described methods, it is characterized in that, according to PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, comprising:
Receive the Downlink Control Information DCI that network side sends, the indication information combined coding of the transmission relevant parameter of PDCSH described in this DCI and a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
In set A, determine parameter X according to described indication information, and according to described indication information directly or in set B, determine parameter Y.
15. method as claimed in claim 14, it is characterized in that, if set A is A={ID1, ID2}, set B is B={b1}, then the information behind the described combined coding takies 3 bits in DCI, and the number of codewords of PDSCH transmission is 1 and 8 states of can encoding respectively in 2 o'clock, and the concrete implication of each state is:
16. the generating apparatus of a demodulation reference mark DMRS scrambler sequence is characterized in that, comprising:
First determining unit is used for determining a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Second determining unit, be used for determining a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y according to Physical Downlink Shared Channel PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Generation unit is used for generating corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Communication unit is used for generating corresponding DRMS scrambler sequence according to the DMRS scrambler initial value that obtains, and adopts this DRMS scrambler sequence that terminal is sent DMRS.
17. device as claimed in claim 16 is characterized in that, described first determining unit is determined a DMRS scrambler initiation parameter set A, comprising:
From first parameter sets of being formed by limited integer that pre-defines, choose one or more parameter and form the described first scrambler initiation parameter set A;
Perhaps,
According to choosing the Serving cell sign ID of terminal with the mode of end side agreement or the device id of terminal is formed the described first scrambler initiation parameter set A.
18. device as claimed in claim 16 is characterized in that, described first determining unit is determined the 2nd DMRS scrambler initiation parameter set B, comprising:
Form described the 2nd DMRS scrambler initiation parameter set B according to choosing in the device id of terminal or the described DMRS scrambler initiation parameter set A a certain preset parameter with the mode of end side agreement;
Perhaps;
From second parameter sets of being formed by limited integer that pre-defines, choose one or more parameter and form the described second scrambler initiation parameter set B.
19. device as claimed in claim 16, it is characterized in that, described second determining unit is according to PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, comprising:
Number of codewords, the transmission number of plies, DMRS port arrangement, DMRS scrambling ID based on the PDSCH transfer of data, PDSCH users multiplexing number and PDSCH transmit or combination in any in the required DMRS sequence characteristic, determine a DMRS scrambler initiation parameter X according to a DMRS scrambler initiation parameter set A, and determine the 2nd DMRS scrambler initiation parameter Y according to the 2nd DMRS scrambler initiation parameter set B.
20. device as claimed in claim 19, it is characterized in that, described second determining unit is based on number of codewords, the transmission number of plies, DMRS port arrangement, the DMRS scrambling ID of PDSCH transfer of data, PDSCH users multiplexing number and PDSCH transmit or combination in any in the required DMRS sequence characteristic, according to the 2nd DMRS scrambler initiation parameter set B, determine the 2nd DMRS scrambler initiation parameter Y, comprise;
Judge number of codewords, the transmission number of plies, DMRS port arrangement, the DMRS scrambling ID of described PDSCH transfer of data, whether in the required DMRS sequence characteristic of PDSCH users multiplexing number and PDSCH transmission one or combination in any satisfy pre-conditioned, if then described the 2nd DMRS scrambler initiation parameter Y is defined as preset value; Otherwise, from described the 2nd DMRS scrambler initiation parameter set B, select the 2nd DMRS scrambler initiation parameter Y.
21. as each described device of claim 16-20, it is characterized in that, after described second determining unit is determined a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, notify terminal with a described DMRS scrambler initiation parameter set A by high-level signaling by described communication unit, perhaps, the acquiescence terminal adopts with the network side stipulated form and confirms a described DMRS scrambler initiation parameter set A; And notify terminal with described the 2nd DMRS scrambler initiation parameter set B by high-level signaling by described communication unit, perhaps, the acquiescence terminal adopts with the network side stipulated form confirms described the 2nd DMRS scrambler initiation parameter set B.
22. as each described device of claim 16-20, it is characterized in that, after described second determining unit is determined a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, after a kind of or combination in any among the number of codewords that the one DMRS scrambler initiation parameter X that will determine by described communication unit and the indication information of the 2nd DMRS scrambler initiation parameter Y and PDSCH transfer of data adopt, the transmission number of plies, DMRS port arrangement and the DMRS scrambling ID was carried out combined coding, DCI issued terminal by Downlink Control Information.
23. device as claimed in claim 22, it is characterized in that, if set A is A={ID1, ID2}, set B is B={b1}, then the information behind the combined coding that obtains of described communication unit takies 3 bits in DCI, and the number of codewords of PDSCH transmission is 1 and 8 states of can encoding respectively in 2 o'clock, and the concrete implication of each state is:
24. the generating apparatus of a demodulation reference mark DMRS scrambler sequence is characterized in that, comprising:
First determining unit is used for determining a DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Second determining unit, be used for determining a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y according to Physical Downlink Shared Channel PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B;
Generation unit is used for generating corresponding DMRS scrambler initial value based on a described DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
Communication unit is used for generating corresponding DMRS scrambler sequence according to the DMRS scrambler initial value that obtains, and receives the DMRS that network side sends according to this DMRS scrambler sequence.
25. device as claimed in claim 24 is characterized in that, described first determining unit is determined a DMRS scrambler initiation parameter set A, comprising:
According to choosing the Serving cell sign ID of terminal with the mode of network side agreement or the device id of terminal is formed the described first scrambler initiation parameter set A;
Perhaps,
Receive a described DMRS scrambler initiation parameter set A of network side high-level signaling notice by communication unit.
26. device as claimed in claim 24 is characterized in that, described first determining unit is determined the 2nd DMRS scrambler initiation parameter set B, comprising:
Form described the 2nd DMRS scrambler initiation parameter set B according to choosing in the device id of terminal or the described DMRS scrambler initiation parameter set A a certain preset parameter with the mode of network side agreement;
Perhaps,
Receive a described DMRS scrambler initiation parameter set B of network side high-level signaling notice by communication unit.
27. as claim 24,25 or 26 described devices, it is characterized in that, described second determining unit is according to PDSCH transmission relevant parameter and a described DMRS scrambler initiation parameter set A and the 2nd DMRS scrambler initiation parameter set B, determine a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y, comprising:
Receive the Downlink Control Information DCI that network side sends, the indication information combined coding of the transmission relevant parameter of PDCSH described in this DCI and a DMRS scrambler initiation parameter X and the 2nd DMRS scrambler initiation parameter Y;
In set A, determine parameter X according to described indication information, and according to described indication information directly or in set B, determine parameter Y.
28. device as claimed in claim 27, it is characterized in that, if set A is A={ID1, ID2}, set B is B={b1}, then the information behind the combined coding that receives of described communication unit takies 3 bits in DCI, and the number of codewords of PDSCH transmission is 1 and 8 states of can encoding respectively in 2 o'clock, and the concrete implication of each state is:
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