CN101668338A - Method for realizing multiuser multiple-input multiple-output (MIMO) in time division duplex (TDD) system and equipment thereof - Google Patents
Method for realizing multiuser multiple-input multiple-output (MIMO) in time division duplex (TDD) system and equipment thereof Download PDFInfo
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Abstract
The invention discloses a method for realizing multiuser multiple-input multiple-output (MIMO) in a time division duplex (TDD) system and equipment thereof. The method comprises the steps: a base station Node B divides n users in a subdistrict into one group; the Node B informs the information of time slot code channel resource, modulation mode and transmission block size to n UEs in the group byHS-SCCH; the n UEs in the group repeatedly use the same time slot code channel resource; the Node B shapes on corresponding time slot code channels of n HS-PDSCHs by wave beam and transmits n servicedata streams; at the corresponding time slot code channel position of the HS-PDSCHs, the each UE in the group receives corresponding service data stream, estimates the channel with a midamble shift sequence corresponding to the code channels, demodulates the received service data and removes interference by a channel estimating result, and feeds back corresponding information to the Node B by an uplink feedback channel HS-SIC. The technical scheme of the method provides a solution for inducing a MU-MIMO technology into a 1.8 Mcps TDD system.
Description
Technical field
The present invention relates to wireless communication technology field, refer to a kind of method and apparatus of in tdd systems, realizing multi-user's multiple-input and multiple-output especially.
Background technology
Multi-user's multiple-input and multiple-output (MU-MIMO, Multiple User Multiple InputMultiple Out put) technology is to utilize the space segmentation between different user to constitute different channels, makes the multiplexing identical physical resource of the user who satisfies certain channel condition.If the MU-MIMO technology is introduced in the upstream or downstream transmission of two (TDD) systems of 1.28Mcps time-division, then can be improved cell capacity.Briefly introduce the upstream or downstream transmission course of existing 1.28McpsTDD system below.
Fig. 1 is the transmission and the receiving course schematic diagram of the high speed descending grouping access system in the existing 3GPP Rel.71.28Mcps TDD standard.As shown in Figure 1, high speed downlink packet in 3GPP Rel.71.28Mcps TDD standard inserts in (HSDPA) system, information such as the time-slot code channel resource that NodeB takies business datum by High-Speed Shared Control Channel (HS-SCCH), modulation system, transmission block size are told UE, on the corresponding time slot code channel of high-speed physical layer DSCH Downlink Shared Channel (HS-PDSCH, High Speed Physical Downlink SharedChannel), send business datum then.UE receives business datum on the time-slot code channel position of the HS-PDSCH of HS-SCCH appointment, use the midamble shift sequence corresponding to carry out channel estimating according to the defaultmidamble method of salary distribution (can with reference to 3GPP TS25.221) with code channel, utilize resulting channel estimation results demodulation business datum and eliminate interference, and pass through the transmission block size and the modulation system information of HSDPA feedback channel (HS-SICH) feeding back ACK/NACK, recommendation.
Fig. 2 is the transmission and the receiving course schematic diagram of the high speed up packet access system in the existing 3GPP Rel.71.28Mcps TDD standard.As shown in Figure 1, high speed uplink packet in 3GPP Rel.71.28Mcps TDD standard inserts in (HSUPA) system, and NodeB tells UE by the up absolute grant channel of enhancing (E-AGCH) with information such as the time-slot code channel resource of uplink business data appointment, UE transmitted powers.UE sends business datum according to the indication of E-AGCH on the corresponding time-slot code channel of enhancing physics up channel (E-PUCH).Node B receives business datum on the corresponding time slot code channel of E-PUCH, use the midamble shift sequence corresponding to carry out channel estimating according to the default midamble method of salary distribution (can with reference to 3GPP TS25.221) with code channel, utilize resulting channel estimation results demodulation business datum and eliminate interference, and pass through HSUPA feedback channel (E-HICH) to UE feeding back ACK/nack message.
3GPP Rel.8 has introduced single user's multiple-input and multiple-output (SU-MIMO) technology in the HSDPA downlink transfer, a plurality of data flow that take identical time-slot code channel resource by transmission improve single user's peak throughput.The space structure of SU-MIMO as shown in Figure 3.
Fig. 3 is the SU-MIMO space structure schematic diagram of the HSDPA system in the existing 3GPP Rel.8 standard.As shown in Figure 3, on original HSDPA downlink transfer basis, information such as the time-slot code channel resource that Node B takies jointly by two data flow of HS-SCCH indication, modulation system utilize wave beam forming to send two data flow again.UE carries out demodulation to each data flow respectively according to the indication of HS-SCCH, then on HS-SICH to the transmission block size and the modulation system information of each data flow feeding back ACK/NACK, recommendation.
If the front is mentioned the MU-MIMO technology is introduced in the upstream or downstream transmission of 1.28Mcps time division duplex (TDD) system, then can be improved cell capacity.But in the prior art owing to the MU-MIMO technology is introduced in the 1.8Mcps TDD system solution when therefore also the MU-MIMO technology being introduced 1.8Mcps TDD system as yet.
Summary of the invention
The invention provides a kind of method that in tdd systems, realizes multi-user's multiple-input and multiple-output, a solution when this method has provided MU-MIMO technology introducing 1.28Mcps TDD system.
The present invention also provides a kind of Node B, and this Node B can realize MU-MIMO in 1.28Mcps TDD system.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The invention discloses a kind of method that realizes multi-user's multiple-input and multiple-output in tdd systems, base station node B is divided into one group with the user of the n in the sub-district, and then the downlink transmission process in this method may further comprise the steps:
Node B is notified to n UE in the group by high-speed shared control channel HS-SCCH with the information that comprises time-slot code channel resource, modulation system and transmission block size of downlink service data; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group;
Node B utilize wave beam forming on the corresponding time slot code channel of n high-speed physical layer DSCH Downlink Shared Channel HS-PDSCH, send respectively with organize in the corresponding n bar business data flow of n UE;
Each UE in the group receives the corresponding service data flow according to the information that receives from HS-SCCH in the corresponding time slot code channel position of HS-PDSCH;
Each UE in the group uses the midamble shift sequence corresponding with code channel to carry out channel estimating, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and feed back corresponding information by downstream feedback channel HS-SICH to Node B.
The invention also discloses a kind of base station node B, this Node B comprises: grouping module and communication module, wherein,
Grouping module is used for, and the user of the n in the sub-district is divided into one group, and group result is notified to communication module;
Communication module is used for by high-speed shared control channel HS-SCCH the information that comprises time-slot code channel resource, modulation system and transmission block size of downlink service data being notified to n UE in the group; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group; Utilize wave beam forming on the corresponding time slot code channel of n high-speed physical layer DSCH Downlink Shared Channel HS-PDSCH, send respectively with organize in the corresponding n bar business data flow of n UE;
Wherein, each UE in the group receives the corresponding service data flow according to the information that receives from HS-SCCH in the corresponding time slot code channel position of HS-PDSCH, and the use midamble shift sequence corresponding with code channel carried out channel estimating, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and feed back corresponding information by uplink feedback channel HS-SICH to communication module.
As seen from the above technical solution, this base station node B of the present invention is divided into one group with the user of the n in the sub-district; Node B is notified to n UE in the group by high-speed shared control channel HS-SCCH with the information that comprises time-slot code channel resource, modulation system and transmission block size of downlink service data; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group; Node B utilize wave beam forming on the corresponding time slot code channel of n high-speed physical layer DSCH Downlink Shared Channel HS-PDSCH, send respectively with organize in the corresponding n bar business data flow of n UE; Each UE in the group receives the corresponding service data flow according to the information that receives from HS-SCCH in the corresponding time slot code channel position of HS-PDSCH; Each UE in the group uses the midamble shift sequence corresponding with code channel to carry out channel estimating, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and by the technical scheme of downstream feedback channel HS-SICH to Node B feedback corresponding information, the concrete solution when having provided with MU-MIMO technology introducing 1.8Mcps TDD system.
Description of drawings
Fig. 1 is the transmission and the receiving course schematic diagram of the high speed descending grouping access system in the existing 3GPP Rel.71.28Mcps TDD standard;
Fig. 2 is the transmission and the receiving course schematic diagram of the high speed up packet access system in the existing 3GPP Rel.71.28Mcps TDD standard;
Fig. 3 is the SU-MIMO space structure schematic diagram of the HSDPA system in the existing 3GPP Rel.8 standard;
Fig. 4 is the space structure schematic diagram when in the embodiment of the invention MU-MIMO technology being applied to the downlink transfer of 1.28Mcps TDD system;
Fig. 5 is the flow chart of downlink transmission process shown in Figure 4;
Fig. 6 is the space structure schematic diagram when in the embodiment of the invention MU-MIMO technology being applied to the uplink of 1.28Mcps TDD system;
Fig. 7 is the flow chart of uplink process shown in Figure 6;
Fig. 8 .1 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1;
Fig. 8 .2 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A;
Fig. 8 .3 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B;
Fig. 8 .4 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2;
Fig. 8 .5 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A;
Fig. 8 .6 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B;
Fig. 9 .1 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1;
Fig. 9 .2 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A;
Fig. 9 .3 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B;
Fig. 9 .4 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2;
Fig. 9 .5 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A;
Fig. 9 .6 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B;
Figure 10 .1 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1;
Figure 10 .2 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A;
Figure 10 .3 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B;
Figure 10 .4 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2;
Figure 10 .5 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A;
Figure 10 .6 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B;
Figure 11 .1 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1;
Figure 11 .2 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A;
Figure 11 .3 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B;
Figure 11 .4 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2;
Figure 11 .5 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A;
Figure 11 .6 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B;
Figure 12 .1 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1;
Figure 12 .2 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A;
Figure 12 .3 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B;
Figure 12 .4 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2;
Figure 12 .5 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A;
Figure 12 .6 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B;
Figure 13 .1 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1;
Figure 13 .2 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A;
Figure 13 .3 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B;
Figure 13 .4 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2;
Figure 13 .5 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A;
Figure 13 .6 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B;
Figure 14 .1 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1;
Figure 14 .2 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A;
Figure 14 .3 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B;
Figure 14 .4 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2;
Figure 14 .5 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A;
Figure 14 .6 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B;
Figure 15 .1 is the K=2 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1;
Figure 15 .2 is the K=2 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2;
Figure 16 is the composition structured flowchart of a kind of Node B of the embodiment of the invention.
Embodiment
In the present invention, mainly provided in the TDD system specific implementation when introducing the MU-MIMO technology.
Fig. 4 is the space structure schematic diagram when in the embodiment of the invention MU-MIMO technology being applied to the downlink transfer of 1.28Mcps TDD system.Fig. 5 is the flow chart of downlink transmission process shown in Figure 4.Referring to Fig. 4, Node B is according to the uplink channel estimation result of each user in the sub-district, and n the UE that interchannel is satisfied certain condition is divided into one group, and then downlink transmission process may further comprise the steps as shown in Figure 5:
In this step, comprise to Node B feedback corresponding information by HS-SICH: information such as the transmission block size of ACK/NACK, recommendation and modulation system.
In flow process shown in Figure 5, comprise midamble shift sequence in the specific field of the business data packet that sends in the step 502, then UE carries out channel estimating according to the midamble shift sequence of the process channel fading in the reception business data flow and the midamble shift sequence of code channel correspondence (promptly without the original midamble shift sequence that declines) in the step 504, and this part content is same as the prior art.
Fig. 6 is the space structure schematic diagram when in the embodiment of the invention MU-MIMO technology being applied to the uplink of 1.28Mcps TDD system.Fig. 7 is the flow chart of uplink process shown in Figure 6.Referring to Fig. 6, Node B is according to the uplink channel estimation result of each user in the sub-district, and n the UE that interchannel is satisfied certain condition is divided into one group, and then uplink process may further comprise the steps as shown in Figure 7:
In this step, by E-HICH to UE feedback corresponding information be: expression receives successful ACK, or represents the NACK that takes defeat.
In flow process shown in Figure 7, comprise midamble shift sequence in the specific field of the business data packet that sends in the step 702, then Node B carries out channel estimating according to the midamble shift sequence of the process channel fading in the reception business data flow and the midamble shift sequence of code channel correspondence (promptly without the original midamble shift sequence that declines) in the step 704, and this part content is same as the prior art.
In embodiments of the present invention, Node B comprises the method that UE in the sub-district divides into groups: (1) selects n minimum UE of correlation to be divided into one group according to the correlation between each UE up channel in the sub-district; (2) according to UE multipath center angle isolation, n the UE that each other multipath center angle is differed certain preset value is divided into one group.
In embodiments of the present invention, when carrying out channel estimating, Node B can distribute identical midamble shift sequence for user in organizing, and also can distribute different midambleshift sequences for each user in organizing.
When Node B distributes identical midamble shift sequence for user in organizing, code channel according to HS-SCCH (or E-AGCH) indication, use the midamble shift sequence of correspondence in the default midamble method of salary distribution to carry out channel estimating, this is identical with traditional HSDPA and HSUPA, but the multiplexing identical time-slot code channel resource of user in the group.
When Node B distributed different midamble shift sequences for user in organizing, Node B needed which its corresponding midamble shift sequence of each UE in the group of notifications is.
The special default midamble method of salary distribution has two kinds of patterns (pattern) in existing TS25.221 agreement, is respectively pattern1 and pattern2, can be used for two times of empty branches.In order to realize the sky branch more than two times, in embodiments of the present invention the existing special default midamble method of salary distribution has been carried out expansion to support doubly empty divide (n＞2) of n.For each pattern after the expansion of different K value shown in figure Fig. 8 .1 to Figure 15 .2.Here, K=2,4,6,8,10,12,14,16, indicate the maximum number of operable midamble shift sequence in the sub-district.
Fig. 8 .1 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1.Fig. 8 .2 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A.Fig. 8 .3 is the K=16 in the embodiment of the invention, the midambleshift sequence schematic diagram under the pattren1B.Fig. 8 .4 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2.Fig. 8 .5 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A.Fig. 8 .6 is the K=16 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B.
When K=16, midamble shift sequence under the pattern1 among Fig. 8 .1 and the midamble shift sequence under the pattren2 among Fig. 8 .4 are exactly two kinds of pattern in the existing special default midamble method of salary distribution.And the pattern1B among the pattren1A among Fig. 8 .2 and Fig. 8 .3 expands out according to the pattern1 among Fig. 8 .1 in the embodiment of the invention, be specially: with the sequence number among the pattren1 among Fig. 8 .1 is that the midamble shift sequence of odd number is released and obtained pattern1A among Fig. 8 .2, is that the midamble shift sequence of even number is released and obtained pattern1B among Fig. 8 .3 with the sequence number among the pattren1 among Fig. 8 .1.For example: with midamble shift m1, m3, the m5 of SF16 row code channel correspondence among the pattern1 among Fig. 8 .1 ... the m15 compartment of terrain is divided into two groups, be m1,5,9,13 and m3,7,11,15, the SF16 code channel granularity of every group of correspondence is the twice of patten1 code channel granularity, for each group of being divided, according to SF is that 16 o'clock midamble shift sequence determines that SF is respectively 8,4,2 and 1 o'clock midamble shift sequence, the concrete grammar that should determine is existing method, specifically can be with reference to figure 8.2 and Fig. 8 .3.
Equally, pattern2B among pattren2A among Fig. 8 .5 and Fig. 8 .6 expands out according to the pattren2 among Fig. 8 .4 in the embodiment of the invention, be specially: with the sequence number among the pattren2 among Fig. 8 .4 is that the midamble shift sequence of odd number is released and obtained pattern2A among Fig. 8 .5, is that the midamble shift sequence of even number is released and obtained pattern2B among Fig. 8 .6 with the sequence number among the pattren2 among Fig. 8 .4.For example: with midamble shift m2, m4, the m6 of SF16 row code channel correspondence among the pattern2 among Fig. 8 .4 ... the m16 compartment of terrain is divided into two groups, be m2,6,10,14 and m4,8,12,16, the SF16 code channel granularity of every group of correspondence is the twice of patten2 code channel granularity, for each group of being divided, according to SF is that 16 o'clock midamble shift sequence determines that SF is respectively 8,4,2 and 1 o'clock midamble shift sequence, the concrete grammar that should determine is existing method, specifically can be with reference to figure 8.5 and Fig. 8 .6.
In above-mentioned figure, m represents midamble shift sequence, and the superscript of m is illustrated in K the sequence number in the midamble shift sequence, and c represents spreading code, and which code channel the superscript of c represents, the subscript of c is represented spreading factor (SF).Below also identical.
From Fig. 8 .1～8.6 as can be seen, when K=16, through corresponding four the different midamble shift sequences of the identical code channel resource in expansion back.For example, for the 16th code channel, the midamble shift sequence corresponding with it comprises: the m among the pattern1A
(13)-c
16 (16), the m among the pattern1B
(15)-c
16 (16), the m among the pattern2A
(14)-c
16 (16), the m among the pattern2B
(16)-c
16 (16)As seen through can realizing at most after the expansion 4 times of empty branches, comprise 4 UE at most in promptly same group.
Fig. 9 .1 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1.Fig. 9 .2 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A.Fig. 9 .3 is the K=14 in the embodiment of the invention, the midambleshift sequence schematic diagram under the pattren1B.Fig. 9 .4 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2.Fig. 9 .5 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A.Fig. 9 .6 is the K=14 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B.
Figure 10 .1 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1.Figure 10 .2 is the K=12 in the embodiment of the invention, the midambleshift sequence schematic diagram under the pattren1A.Figure 10 .3 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B.Figure 10 .4 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2.Figure 10 .5 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A.Figure 10 .6 is the K=12 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B.
Figure 11 .1 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1.Figure 11 .2 is the K=10 in the embodiment of the invention, the midambleshift sequence schematic diagram under the pattren1A.Figure 11 .3 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1B.Figure 11 .4 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2.Figure 11 .5 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A.Figure 11 .6 is the K=10 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B.
Figure 12 .1 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1.Figure 12 .2 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A.Figure 12 .3 is the K=8 in the embodiment of the invention, the midambleshift sequence schematic diagram under the pattren1B.Figure 12 .4 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2.Figure 12 .5 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A.Figure 12 .6 is the K=8 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B.
Figure 13 .1 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1.Figure 13 .2 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A.Figure 13 .3 is the K=6 in the embodiment of the invention, the midambleshift sequence schematic diagram under the pattren1B.Figure 13 .4 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2.Figure 13 .5 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A.Figure 13 .6 is the K=6 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B.
Figure 14 .1 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1.Figure 14 .2 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1A.Figure 14 .3 is the K=4 in the embodiment of the invention, the midambleshift sequence schematic diagram under the pattren1B.Figure 14 .4 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2.Figure 14 .5 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2A.Figure 14 .6 is the K=4 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2B.
Figure 15 .1 is the K=2 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren1.Figure 15 .2 is the K=2 in the embodiment of the invention, the midamble shift sequence schematic diagram under the pattren2.
As can be seen, at K=14 (12,10,8,6,4) time, Fig. 9 .1 (10.1,11.1,12.1,13.1,14.1) in pattren1 under midamble shift sequence and Fig. 9 .4 (10.4,11.4,12.4,13.4,14.4) in pattren2 under midamble shift sequence be exactly two kinds of pattern in the existing special default midamble method of salary distribution.And the pattern1B among the pattren1A among Fig. 9 .2 (10.2,11.2,12.2,13.2,14.2) and Fig. 9 .3 (10.3,11.3,12.3,13.3,14.3) expands out according to the pattren1 among Fig. 9 .1 in the embodiment of the invention.Equally, Fig. 9 .5 (10.5,11.5,12.5,13.5,14.5) in pattren2A and the pattern2B among Fig. 9 .6 (10.6,11.6,12.6,13.6,14.6) be according to Fig. 9 .4 (10.4 in the embodiment of the invention, 11.4,12.4,13.4,14.4) in pattren2 expand out.Can support 4 times of empty branches after the expansion at most.When K=2, can not expand again.
Each pattern structure during from above different K values as can be seen, identical code channel resource correspondence different midamble shift sequences in the time slot, distribute different midamble shift sequences if Node B is the UE in same group, then Node B needs which its corresponding midamble shift sequence of each UE in the group of notifications is.Provide two kinds of methods in the embodiment of the invention: a kind of method is to increase the signaling indication in control channel HS-SCCH or E-AGCH, and another kind of method is to use HS-SCCH order or E-AGCH order to indicate.Describe respectively below.
Method one
9 types HS-SCCH and 2 types E-AGCH are arranged in the 3GPP TS25.222R8 agreement.9 types HS-SCCH is used for traditional scheduler, semi-continuous (SPS) scheduling and the indication of MIMO single current, and 2 kinds of E-AGCH are used for traditional scheduler and semi-continuous scheduling.In the embodiment of the invention, be that different UEs on the same group is when distributing different midamble shift sequences, in order to pass through its corresponding midamble shift sequence of each UE in HS-SCCH (during downlink transfer) and E-AGCH (during uplink) group of notifications, the information field of HS-SCCH and E-AGCH has been carried out following modification respectively:
HS-SCCH Class1～9
(1) first type HS-SCCH (Type1, traditional scheduler)
The information field form of existing first type HS-SCCH is as shown in table 1:
| Information field | ?CCS | ??TS | ??Mod | ??TBS | ??HAP | ??RV | ??NDI | ??HCSN | ??CRC?UE?ID |
| Bit number | ??8 | ??5 | ??1 | ??6 | ??3 | ??3 | ??1 | ??3 | ??16 |
Table 1
In embodiments of the present invention, the crc field of the HS-SCCH by type in first is informed UE empty branch whether, and indicates the code channel and the midamble shift sequence of UE correspondences with 8 bits of CCS field.For example, whether empty the branch and not empty branch distinguished in polarity inversion with CRC: the counter-rotating expression is empty to divide the not empty branch of nonreversible expression.A kind of definition of 8 bits of CCS field can be as shown in table 2:
Table 2
Xccs1～Xccs8 represents 8 bits of CCS field respectively in table 2, and SF represents spreading factor, and Kstart represents initial code channel, and Kstop represents to finish code channel (code channel is a continuous dispensing, therefore only need inform initial code channel and finish code channel to get final product).About the various empty branch situation in the table 2,8 of CCS field are more specific as follows than specific implication:
1) when not empty branch, during SF=16: Kstart and Kstop represent with 4 bits respectively, and Kstart is less than or equal to Kstop;
2) when not empty branch, during SF=1: Kstart shows SF=1 more than or equal to one group of numerical table of Kstop, Kstart=1111 here, Kstop=0000;
3) when two times of empty branches, during SF=16: first bit Xccs1 of CCS is 0, represents two times of empty branches; Kstart and Kstop represent that with 3 bits M=0 represents pattern1 respectively, and M=1 represents pattern2; Kstart is less than or equal to Kstop;
4) when two times of empty branches, during SF=1: first bit Xccs1 of CCS is 0, represents two times of empty branches; Kstart and Kstop represent that with 3 bits M=0 represents pattern1 respectively, and M=1 represents pattern2; Kstart shows SF=1 more than or equal to one group of numerical table of Kstop;
5) when many times of empty branches, during SF=16, first bit Xccs1 of CCS is 1, represents many times of empty branches; Kstart and Kstop represent with 2 bits that respectively the value 00,01,10 and 11 of M1 M2 is represented pattern1A, pattern1B, pattern2A and pattern2B respectively; Kstart is less than or equal to Kstop;
6) when many times of empty branches, during SF=1, first bit Xccs1 of CCS is 1, represents many times of empty branches; Kstart and Kstop represent with 2 bits that respectively the value 00,01,10 and 11 of M1 M2 is represented pattern1A, pattern1B, pattern2A and pattern2B respectively; Kstart shows SF=1 more than or equal to one group of numerical table of Kstop.
Here, be meant 3 times of empty branches or the sky branch more than 3 times many times of empty branches.
(2) second types HS-SCCH (Type2, first scheduling, the SU-MIMO double fluid SF=1 of passing of SPS)
The information field form of existing second type HS-SCCH is as shown in table 3:
| Information field | ??11xx10xx ??RRPI&TBS | ??TS | ??CCS | ??Mod | The Hs-SICH indication | ??HCSN | Reserve | ??CRC ??UE?ID |
| Bit number | ??8 | ??5 | ??6 | ??1 | ??2 | ??3 | ??5 | ??16 |
Table 3
In embodiments of the present invention, the crc field of the HS-SCCH by type in second is informed UE empty branch whether, and indicates the code channel and the midamble shift sequence of UE correspondences with 6 bits of CCS field.For example, whether empty the branch and not empty branch distinguished in polarity inversion with CRC: the counter-rotating expression is empty to divide the not empty branch of nonreversible expression.A kind of definition of 6 bits of CCS field can be as shown in table 4:
Table 4
Xccs1～Xccs6 represents 6 bits of CCS field respectively in table 6, and SF represents spreading factor, and Kstart represents initial code channel, and Kstop represents to finish code channel (code channel is a continuous dispensing, therefore only need inform initial code channel and finish code channel to get final product).About the various empty branch situation in the table 4,6 of CCS field are more specific as follows than specific implication:
1) when not empty branch, during SF=16: Kstart and Kstop represent with 3 bits respectively, and Kstart is less than or equal to Kstop;
2) when not empty branch, during SF=1: Kstart shows SF=1 more than or equal to one group of numerical table of Kstop, Kstart=100 here, Kstop=010;
3) when two times of empty branches, during SF=16: first bit Xccs1 of CCS is 0, represents two times of empty branches; Kstart and Kstop represent that with 2 bits M=0 represents pattern1 respectively, and M=1 represents pattern2; Kstart is less than or equal to Kstop;
4) when two times of empty branches, during SF=1: first bit Xccs1 of CCS is 0, represents two times of empty branches; Kstart and Kstop represent that with 2 bits M=0 represents pattern1 respectively, and M=1 represents pattern2; Kstart shows SF=1 more than or equal to one group of numerical table of Kstop;
5) when many times of empty branches, during SF=16, first bit Xccs1 of CCS is 1, represents many times of empty branches; Kstart and Kstop represent with 1 bit that respectively the value 00,01,10 and 11 of M1 M2 is represented pattern1A, pattern1B, pattern2A and pattern2B respectively; Kstart is less than or equal to Kstop;
6) when many times of empty branches, during SF=1, first bit Xccs1 of CCS is 1, represents many times of empty branches; Kstart and Kstop represent with 1 bit that respectively the value 00,01,10 and 11 of M1 M2 is represented pattern1A, pattern1B, pattern2A and pattern2B respectively; Kstart shows SF=1 more than or equal to one group of numerical table of Kstop.
(3) HS-SCCH of the third type (Type3, SPS retransfer scheduling, SU-MIMO double fluid SF=1)
The information field form of the HS-SCCH of existing the third type is as shown in table 5:
| Information field | ??11xx10xx ??RRPI&TBS | ??TS | ??CCS | ??Mod | ??RV | ??PTR | ??HCSN | Reserve | ??CRC ??UE?ID |
| Bit number | ??8 | ??5 | ??6 | ??1 | ??2 | ??4 | ??3 | ??1 | ??16 |
Table 5
The method for designing that not empty branch and sky divide under the type MU-MIMO is second type HS-SCCH together, promptly inform with crc field whether sky divides UE, and with the code channel and the midamble shift sequence of 6 bits indication UE correspondences of CCS field, the implication of 6 bits of CCS field is no longer repeated here with table 4.
(4) the 4th types HS-SCCH (Type4, SU-MIMO single-stream transmission, SU-MIMO double fluid SF=1)
The information field form of existing the 4th type HS-SCCH is as shown in table 6:
| Information field | ??0xxxxxx1 ??CCS | ??TS | ??Mod | ??TBS | ??HAP | ??RV | ??HCSN | Reserve | ??CRC ??UE?ID |
| Bit number | ??8 | ??5 | ??1 | ??6 | ??4 | ??2 | ??3 | ??1 | ??16 |
Table 6
The method for designing that not empty branch and sky divide under the type MU-MIMO is second type HS-SCCH together.
(5) the 5th types HS-SCCH (Type5, SU-MIMO stream transmission, SU-MIMO double fluid SF=1)
The information field form of existing the 5th type HS-SCCH is as shown in table 7:
| Information field | ??1xxxxxx0 ??Mod2&TBS2 ??Offset | ??TS | ??TBS | ??Mod | ??HAP | ??RV1 | ??RV2 | ??HCSN | ??CRC ??UE?ID |
| Bit number | ??8 | ??5 | ??6 | ??1 | ??3 | ??2 | ??2 | ??3 | ??16 |
Table 7
The type is not supported MU-MIMO.Because among the SU-MIMO, as every antenna of UE and Node
Node B just can send double-current data flow to UE when the channel between B satisfied certain condition, MU-MIMO requires the channel between double-current user to satisfy certain condition again simultaneously, SU-MIMO double fluid user could be divided into one group of MU-MIMO user when two kinds of channel conditions satisfy simultaneously, so the type supports that the possibility of MU-MIMO is very little.
(6) the 6th types HS-SCCH (Type6, first scheduling, the SU-MIMO double fluid SF=1/SF=16 of passing of SPS)
The information field form of existing the 6th type HS-SCCH is as shown in table 8:
| Information field | ??1x0 ??Flag | ??CCS | ??TS | ??Mod | ??RRPI | ??TBS | The HS-SICH indication | ??HCSN | Reserve | ??CRC ??UE?ID |
| Bit number | ??3 | ??8 | ??5 | ??1 | ??2 | ??2 | ??2 | ??3 | ??8 | ??16 |
Table 8
The method for designing that not empty branch and sky divide under the type MU-MIMO is first type HS-SCCH together.
(7) the 7th types HS-SCCH (Type7, SPS retransfer scheduling, SU-MIMO double fluid SF=1/SF=16)
The information field form of existing the 7th type HS-SCCH is as shown in table 9:
| Information field | ??1x0 ??Flag | ??CCS | ??TS | ??Mod | ??RRPI | ??TBS | ??RV | ??PTR | ??HCSN | Reserve | ??CRC ??UE?ID |
| Bit number | ??3 | ??8 | ??5 | ??1 | ??2 | ??2 | ??2 | ??4 | ??3 | ??4 | ??16 |
Table 9
The method for designing that not empty branch and sky divide under the type MU-MIMO is first type HS-SCCH together.
(8) the 8th types HS-SCCH (Type8, SU-MIMO single current, SU-MIMO double fluid SF=1/SF=16)
The information field form of existing the 8th type HS-SCCH is as shown in table 10:
| Information field | ??CCS | ??TBS1 | ??Mod | ??TS | ??RV1 | ??Type ??Flag | ??Field ??Flag | ??SI | ??HAP | ??HCSN | ??CRC ??UE?ID |
| Bit number | ??4 | ??6 | ??1 | ??5 | ??2 | ??6 | ??1 | ??2 | ??4 | ??3 | ??16 |
Table 10
The method for designing that not empty branch and sky divide under the type MU-MIMO is second type HS-SCCH together, and wherein, totally 6 bits of CCS and SI field are identical to the definition of 6 bit CCS among the HS-SCCH of type in the indicating mode and second of code channel.
(9) the 9th types HS-SCCH (Type9, SU-MIMO double fluid, SU-MIMO double fluid SF=1/SF=16)
The information field form of existing the 9th type HS-SCCH is as shown in table 11:
| Information field | ??CCS | ??TBS1 | ??Mod1 | ??TS | ??RV1 | ??TBS1 | ??Mod2 | ??RV2 | ??HAP | ??HCSN | ??CRC ??UE?ID |
| Bit number | ??4 | ??6 | ??1 | ??5 | ??2 | ??6 | ??1 | ??2 | ??4 | ??3 | ??16 |
Table 11
The type is not supported MU-MIMO.
E-AGCH Class1 and 2
(1) first type E-AGCH (Type1, traditional scheduler)
The information field form of existing first type E-AGCH is as shown in table 12:
| Information field | ??PRRI | ??CRRI | ??TRRI | ??ECSN | ??RDI | The E-HICH indication | ??EN | ??CRC ??UE?ID |
| Bit number | ??5 | ??5 | ??5 | ??3 | ??3 | ??2 | ??3 | ??16 |
Table 12
In embodiments of the present invention, inform by the crc field of first type E-AGCH that UE is whether empty and divide, and indicate the code channel and the midamble shift sequence of this UE correspondence with 5 bits of this CRRI field of E-AGCH of type in first.For example, whether empty the branch and not empty branch distinguished in polarity inversion with CRC: the counter-rotating expression is empty to divide the not empty branch of nonreversible expression.The type refers to support two times of empty branches, and a kind of definition of 5 bits of CRRI field can be as shown in table 13 at this moment:
Table 13
(2) second types E-AGCH (Type2, SPS scheduling)
The information field form of existing second type E-AGCH is as shown in table 14:
| Information field | ??PRRI | ??CRRI | ??TRRI | ??ECSN | ??Field ??Flag | ??SI1 | ??SI2 | ??ENI | Reserve | ??CRC ??UE?ID |
| Bit number | ??5 | ??4 | ??5 | ??3 | ??2 | ??2 | ??5 | ??3 | ??1 | ??16 |
Table 14
In embodiments of the present invention, Node B informs by the crc field of second type E-AGCH that UE is whether empty and divides, and indicates the code channel and the midamble shift sequence of this UE correspondence with 1 bit of 5 bits of the SI2 field of this E-AGCH of second type and reserved field.For example, whether empty the branch and not empty branch distinguished in polarity inversion with CRC: the counter-rotating expression is empty to divide the not empty branch of nonreversible expression.The type refers to support two times of empty branches and many times of empty branches, and the concrete definition of SI2 field and reserved field can be as shown in Table 15:
| Empty branch situation | ?Xinfo2，4 | ??Xinfo2，5 | Explanation |
| Two times of empty branches | Reserve | ??M | M=0 represents pattern1; M=1 represents pattern2; |
| Many times of empty branches | ??M1 | ??M2 | The |
Table 15
In table 15, Xinfo2, the 4th bit of 4 expression SI2 fields, Xinfo2, the 5th bit of 5 expression SI2 fields.
Method two
Among the 3GPP TS25.222Rel.8 two kinds of HS-SCCH order types and a kind of E-AGCH order type are arranged at present, be used to indicate semi-continuous scheduling and DRX process activation, only taken 16 bits of 5 bits of TS field and 3 bits subsequently and UE ID, all the other bits are reserved.In TDD of the present invention system, introduce under the scene of MU-MIMO, can increase a kind of HS-SCCH order type and E-AGCH order type indication UE and enter or withdraw from the MU-MIMO state, Node B can use 3 pattern (being the midamble shift sequence of code channel correspondence) that reserved bit indication UE uses outside 24 bits that used, and each information field of HS-SCCH and E-AGCH control channel is still understood according to existing implication, promptly informs the code channel that it is corresponding to UE.
Promptly in the method, outside HS-SCCH (E-AGCH) control channel, introduced HS-SCCHorder type (E-AGCH order type).Wherein, the implication of each field of HS-SCCH (E-AGCH) control channel is constant, UE is the code channel of self correspondence as can be known therefrom, and Node B informs the Pattern of code channel correspondence by HS-SCCHorder (E-AGCH order) to UE, promptly informs it specifically is which midamble shift sequence of this code channel to UE.Describe respectively below.
(1) first type HS-SCCH order (Type1 is based on first type HS-SCCH)
The contrast of the information field form of first type HS-SCCH order after defining at MU-MIMO among the information field form of existing first type HS-SCCH order and the present invention is shown in table 16:
Table 16
In table 16, the different values of MIM2M3 represent that respectively uplink synchronous foundation, release half-persistence scheduling resources, DRX activate, the DRX deexcitation, and this is existing definition in the prior art.6 kinds of pattern:pattern1, pattern1A, pattern1B, pattern2, pattern2A and pattern2B under different K values, representing not empty branch and empty timesharing in embodiments of the present invention with 7 values 000～110 of M4M5M6 respectively.
In one embodiment of the invention promptly, for each UE in the group, Node B sends HS-SCCH order earlier, present undefined 3 reserved bit are informed the pattern that UE uses in the TBS field wherein, send the code channel that first type HS-SCCH informs this UE correspondence subsequently, each field implication of first type HS-SCCH is identical with existing implication.
(2) second types HS-SCCH order (Type2 is based on the 6th type HS-SCCH)
The contrast of the information field form of second type HS-SCCH order after defining at MU-MIMO among the information field form of existing second type HS-SCCH order and the present invention is shown in table 17:
Table 17
In table 17, the different values of MIM2M3 represent to discharge half-persistence scheduling resources, DRX activation, DRX deexcitation respectively, and this is existing definition in the prior art.6 kinds of pattern:pattern1, pattern1A, pattern1B, pattern2, pattern2A and pattern2B under different K values, representing not empty branch and empty timesharing in embodiments of the present invention with 7 values 000～110 of M4M5M6 respectively.
In one embodiment of the invention promptly, for each UE in the group, Node B sends HS-SCCH order earlier, present undefined 3 reserved bit are informed the pattern that UE uses in the TBS field wherein, send the code channel that first type HS-SCCH informs this UE correspondence subsequently, each field implication of first type HS-SCCH is identical with existing implication.
(3) E-AGCH order (based on second type E-AGCH)
The contrast of the information field form of the E-AGCH order after defining at MU-MIMO among the information field form of existing E-AGCH order and the present invention is shown in table 18:
Table 18
In table 18,000 expression of MIM2M3 value discharges half-persistence scheduling resources, and this is existing definition in the prior art.6 kinds of pattern:pattern1, pattern1A, pattern1B, pattern2, pattern2A and pattern2B under different K values, representing not empty branch and empty timesharing in embodiments of the present invention with 7 values 000～110 of M4M5M6 respectively.
In one embodiment of the invention promptly, for each UE in the group, Node B sends E-AGCH order earlier, in the FieldFlag field wherein at present undefined 2 reserved bit when 1 reserved bit in the SI1 field inform the pattern that UE uses, send the code channel that second type E-AGCH informs this UE correspondence subsequently, each field implication of second type E-AGCH is identical with existing implication.
In an embodiment of the present invention, in the downlink transmission process, UE receives HS-PDSCH and demodulation according to the HS-SCCH indication on corresponding time-slot code channel, on HS-SICH, feed back modulation system, transmission block size and ACK/NACK information then, modulation system and the transmission block size of Node B during according to the feedback of UE decision transmission next time.Because the empty timesharing of business datum, a plurality of users use identical time-slot code channel resource, and Node B need carry out power division according to a certain percentage to the different user on the same code channel resource, and the feedback information of UE also is based on the watt level after the distribution.Therefore divide the multiple change or switch to not empty timesharing when empty by the sky branch, Node B need convert according to the ratio of preceding once empty timesharing on the basis of the modulation system of UE feedback and transmission block size, to determine the transmission block size and the modulation system of business data flow next time.For example during the MU-MIMO downlink transfer, number of users is 4 in the group, i.e. 4 user A in this time slot, B, C, the multiplexing identical code channel resource of D, Node B is divided into 4 parts with the power on this code channel, transmit 4 business data flows respectively and give 4 users, each user goes up feedback modulation system and transmission block size based on the power that is divided into after 4 parts with HS-SICH.When Node B switches to 2 times of empty timesharing, be interior 2 user A of next time slot scheduling and the multiplexing identical code channel resource of B (user C withdraws from D), Node B is divided into 2 parts with the power on this this code channel, because when to give the power of user A and B this moment be last transmission 2 times, therefore determine the transmission block size to be respectively big or small 2 times of its feedback.
Provide the composition structured flowchart of a kind of NodeB among the present invention based on the foregoing description.
Figure 16 is the composition structured flowchart of a kind of Node B of the embodiment of the invention.As shown in figure 16, this Node B comprises: grouping module 1601 and communication module 1602, wherein,
Wherein, each UE in the group receives the corresponding service data flow according to the information that receives from HS-SCCH in the corresponding time slot code channel position of HS-PDSCH, and the use midamble shift sequence corresponding with code channel carried out channel estimating, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and feed back corresponding information by uplink feedback channel HS-SICH to communication module.
In Figure 16, described communication module 1602, be further used for the information that comprises time-slot code channel resource and UE transmitted power of uplink business data being notified to n UE in the group, make UE send business datum at the corresponding time-slot code channel of enhancing physics up channel E-PUCH according to the information that receives from E-AGCH by strengthening up absolute grant channel E-AGCH; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group; Be used on the corresponding time slot code channel of E-PUCH, receiving business datum, use the midamble shift sequence corresponding to carry out channel estimating with code channel, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and feed back corresponding information by downstream feedback channel E-HICH to UE.
In Figure 16, described grouping module 1601 is used for according to the correlation between each UE up channel in the sub-district, selects n minimum UE of correlation to be divided into one group; Perhaps, according to UE multipath center angle isolation, n the UE that each other multipath center angle is differed certain preset value is divided into one group.
In Figure 16, this Node B carries out channel estimating for n UE in the group distributes different midamble shift sequences, then described communication module 1602 is used for the employed different midamble shift sequence of each UE in the group is notified to each interior UE of group respectively;
Described communication module 1602 is used for when downlink transfer, and the employed different midamble shift sequence of each UE in will organizing by HS-SCCH is notified to each UE in the group respectively; The employed different midambleshift sequence of each UE in perhaps will organizing by HS-SCCH order order is notified to each UE in the group respectively; The specific implementation process is no longer repeated here referring to the embodiment of front.
Described communication module 1602 is used for when downlink transfer, and the employed different midamble shift sequence of each UE in will organizing by E-AGCH is notified to each UE in the group respectively; The employed different midamble shift sequence of each UE in perhaps will organizing by E-AGCH order order is notified to each UE in the group respectively.The specific implementation process is no longer repeated here referring to the embodiment of front.
In sum, this base station node B of the present invention is divided into one group with the user of the n in the sub-district; Node B is notified to n UE in the group by high-speed shared control channel HS-SCCH with the information that comprises time-slot code channel resource, modulation system and transmission block size of downlink service data; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group; Node B utilize wave beam forming on the corresponding time slot code channel of n high-speed physical layer DSCH Downlink Shared Channel HS-PDSCH, send respectively with organize in the corresponding n bar business data flow of n UE; Each UE in the group receives the corresponding service data flow according to the information that receives from HS-SCCH in the corresponding time slot code channel position of HS-PDSCH; Each UE in the group uses the midamble shift sequence corresponding with code channel to carry out channel estimating, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and by the technical scheme of downstream feedback channel HS-SICH to Node B feedback corresponding information, the concrete solution when having provided with MU-MIMO technology introducing 1.28Mcps TDD system.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1, a kind of method that realizes multi-user's multiple-input and multiple-output in tdd systems is characterized in that base station node B is divided into one group with the user of the n in the sub-district, and then the downlink transmission process in this method may further comprise the steps:
Node B is notified to n UE in the group by high-speed shared control channel HS-SCCH with the information that comprises time-slot code channel resource, modulation system and transmission block size of downlink service data; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group;
Node B utilize wave beam forming on the corresponding time slot code channel of n high-speed physical layer DSCH Downlink Shared Channel HS-PDSCH, send respectively with organize in the corresponding n bar business data flow of n UE;
Each UE in the group receives the corresponding service data flow according to the information that receives from HS-SCCH in the corresponding time slot code channel position of HS-PDSCH;
Each UE in the group uses the midamble shift sequence corresponding with code channel to carry out channel estimating, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and feed back corresponding information by uplink feedback channel HS-SICH to Node B.
2, the method for claim 1 is characterized in that, this method further comprises the following steps of uplink process:
Node B is notified to n UE in the group by strengthening up absolute grant channel E-AGCH with the information that comprises time-slot code channel resource and UE transmitted power of uplink business data; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group;
UE sends business datum according to the information that receives from E-AGCH at the corresponding time-slot code channel that strengthens physics up channel E-PUCH;
Node B receives business datum on the corresponding time slot code channel of E-PUCH, use the midamble shift sequence corresponding to carry out channel estimating with code channel, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and feed back corresponding information by downstream feedback channel E-HICH to UE.
3, method as claimed in claim 1 or 2 is characterized in that, described base station node B is divided into one group with the UE of the n in the sub-district and comprises:
According to the correlation between each UE up channel in the sub-district, select n minimum UE of correlation to be divided into one group; Perhaps
According to UE multipath center angle isolation, n the UE that each other multipath center angle is differed certain preset value is divided into one group.
4, method as claimed in claim 1 or 2 is characterized in that, n UE in the group uses identical midamble shift sequence to carry out channel estimating.
5, method as claimed in claim 1 or 2, it is characterized in that, n UE in the group uses different midamble shift sequences to carry out channel estimating, and then this method further comprises: the employed different midamble shift sequence of each UE in NodeB will organize is notified to each UE in the group respectively.
6, method as claimed in claim 5 is characterized in that, each UE that the employed different midamble shift sequence of each UE in described Node B will organize is notified in the group comprises:
When downlink transfer, the employed different midamble shift sequence of each UE in Node B will organize by HS-SCCH is notified to each UE in the group respectively; The employed different midamble shift sequence of each UE in perhaps Node B will organize by HS-SCCH order order is notified to each UE in the group respectively;
When downlink transfer, the employed different midamble shift sequence of each UE in Node B will organize by E-AGCH is notified to each UE in the group respectively; The employed different midamble shift sequence of each UE in perhaps Node B will organize by the E-AGCHorder order is notified to each UE in the group respectively.
7, method as claimed in claim 6 is characterized in that, each UE that the employed different midamble shift sequence of each UE in described Node B will organize by HS-SCCH is notified to respectively in the group comprises:
For each UE in the group, Nobe B informs by the crc field of the first/the 6th/seven type HS-SCCH that this UE is whether empty and divides, and indicates the code channel and the midambleshift sequence of this UE correspondence with 8 bits of the CCS field of this HS-SCCH of the first/the 6th/seven type;
Perhaps, for each UE in the group, the CRC of Node B by the second/the 3rd/four type HS-SCCH informs this UE empty branch whether, and indicates the code channel and the midambleshift sequence of this UE correspondence with 6 bits of the CCS field of this HS-SCCH of the second/the 3rd/four type;
Perhaps, for each UE in the group, Node B informs by the crc field of the 8th type HS-SCCH that this UE is whether empty and divides, and indicates the code channel and the midamble shift sequence of this UE correspondence with 6 bits of the CCS field of the 8th type HS-SCCH and SI field.
8, method as claimed in claim 6 is characterized in that, the employed different midamble shift sequence of each UE in described Node B will organize by HS-SCCH order order and HS-SCCH is notified to respectively to be organized each interior UE and comprise:
For each UE in the group, Node B informs the code channel of this UE correspondence by first type HS-SCCH, informs the midamble shift sequence of this UE correspondence by 3 reserved bit in the TBS field of first type HS-SCCH order order; Perhaps
For each UE in the group, Node B informs the code channel of this UE correspondence by the 6th type HS-SCCH, informs the midamble shift sequence of this UE correspondence by 2 reserved bit in the TBS field of second type HS-SCCH order order and 1 reserved bit in the HS-SICH indication field.
9, method as claimed in claim 6 is characterized in that, each UE that the employed different midamble shift sequence of each UE in described Node B will organize by E-AGCH is notified to respectively in the group comprises:
For each UE in the group, Node B informs by the crc field of first type E-AGCH that this UE is whether empty and divides, and indicates the code channel and the midamble shift sequence of this UE correspondence with 5 bits of the CRRI field of this E-AGCH of first type;
Perhaps, for each UE in the group, Node B informs by the crc field of second type E-AGCH that this UE is whether empty and divides, and indicates the code channel and the midambleshift sequence of this UE correspondence with 1 bit of 5 bits of the SI2 field of this E-AGCH of second type and reserved field.
10, method as claimed in claim 6 is characterized in that, the employed different midambleshift sequence of each UE in described Node B will organize by E-AGCH order order and E-AGCH is notified to respectively to be organized each interior UE and comprise:
For each UE in the group, Node B informs the code channel of this UE correspondence by second type E-AGCH, and informs the midamble shift sequence of this UE correspondence by 2 reserved bit in the FieldFlag field of E-AGCH order order and 1 reserved bit in the SI1 field.
11, the method for claim 1 is characterized in that, when sky divides multiple to change or switches to not empty timesharing by the sky branch, this method further comprises:
Node B determines the transmission block size and the modulation system of the business data flow that send next time according to the corresponding information of UE feedback and the power division ratio of the empty timesharing of last time.
12, method as claimed in claim 5 is characterized in that, this method further comprises:
Specifying under the K value, pattern1 for the special default midamble method of salary distribution in the TS25.221 agreement, it with spreading factor SF the midamble shift sequence of 16 code channel correspondence, be divided into two groups according to its ordering sequence number compartment of terrain, the SF of every group of correspondence is that 16 code channel granularity is the twice of pattern1 code channel granularity, for each group of being divided, be that 16 o'clock midamble shift sequence determines that SF is respectively 8,4,2 and 1 o'clock midamble shift sequence according to SF; Equally, pattern2 for the special default midamble method of salary distribution in the TS25.221 agreement, it with SF the midamble shift sequence of 16 code channel correspondence, be divided into two groups according to its ordering sequence number compartment of terrain, the SF of every group of correspondence is that 16 code channel granularity is the twice of patternl code channel granularity, for each group of being divided, be that 16 o'clock midamble shift sequence determines that SF is respectively 8,4,2 and 1 o'clock midamble shift sequence according to SF;
Wherein, K represents the maximum number of operable midamble shift sequence in the sub-district, K value 16,14,12,10,8,6 or 4.
13, a kind of base station node B is characterized in that, this Node B comprises: grouping module and communication module, wherein,
Grouping module is used for the user of the n in the sub-district is divided into one group, and group result is notified to communication module;
Communication module is used for by high-speed shared control channel HS-SCCH the information that comprises time-slot code channel resource, modulation system and transmission block size of downlink service data being notified to n UE in the group; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group; Utilize wave beam forming on the corresponding time slot code channel of n high-speed physical layer DSCH Downlink Shared Channel HS-PDSCH, send respectively with organize in the corresponding n bar business data flow of n UE;
Wherein, each UE in the group receives the corresponding service data flow according to the information that receives from HS-SCCH in the corresponding time slot code channel position of HS-PDSCH, and the use midamble shift sequence corresponding with code channel carried out channel estimating, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and feed back corresponding information by uplink feedback channel HS-SICH to communication module.
14, Node B as claimed in claim 13 is characterized in that,
Described communication module, be further used for the information that comprises time-slot code channel resource and UE transmitted power of uplink business data being notified to n UE in the group, make UE send business datum at the corresponding time-slot code channel of enhancing physics up channel E-PUCH according to the information that receives from E-AGCH by strengthening up absolute grant channel E-AGCH; Wherein, the multiplexing identical time-slot code channel resource of n UE in the group; Be used on the corresponding time slot code channel of E-PUCH, receiving business datum, use the midamble shift sequence corresponding to carry out channel estimating with code channel, the business datum and the elimination that utilize resulting channel estimation results demodulation to be received are disturbed, and feed back corresponding information by downstream feedback channel E-HICH to UE.
15, as claim 13 or 14 described Node B, it is characterized in that,
Described grouping module is used for according to the correlation between each UE up channel in the sub-district, selects n minimum UE of correlation to be divided into one group; Perhaps, according to UE multipath center angle isolation, n the UE that each other multipath center angle is differed certain preset value is divided into one group.
As claim 13 or 14 described Node B, it is characterized in that 16, this Node B carries out channel estimating for n UE in the group distributes different midamble shift sequences,
Then described communication module is used for the employed different midamble shift sequence of each UE in the group is notified to each interior UE of group respectively.
17, Node B as claimed in claim 16 is characterized in that,
Described communication module is used for when downlink transfer, and the employed different midamble shift sequence of each UE in will organizing by HS-SCCH is notified to each UE in the group respectively; The employed different midamble shift sequence of each UE in perhaps will organizing by HS-SCCH order order is notified to each UE in the group respectively;
Described communication module is used for when downlink transfer, and the employed different midamble shift sequence of each UE in will organizing by E-AGCH is notified to each UE in the group respectively; The employed different midamble shift sequence of each UE in perhaps will organizing by E-AGCH order order is notified to each UE in the group respectively.
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