CN102754364A

CN102754364A - Method for indicating a DM-RS antenna port in a wireless communication system

Info

Publication number: CN102754364A
Application number: CN2011800090055A
Authority: CN
Inventors: 金润善; 韩臸奎; 金圣泰; 延明勋; 单成; 李仁镐
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2010-02-11
Filing date: 2011-02-11
Publication date: 2012-10-24
Anticipated expiration: 2031-02-11
Also published as: USRE48954E1; AU2011215025A1; RU2012121693A; JP5756815B2; JP2015188239A; CN102754364B; JP5993063B2; JP2013520066A; KR20110093564A; CA2787834A1; CN105187181B; RU2556078C2; CN105187181A; RU2015118984A; USRE48935E1; AU2011215025B2; RU2015118984A3; CA2787834C; RU2674647C2; KR101688551B1

Abstract

A control information interpretation method for use in a mobile communication system including a terminal and a base station, wherein the terminal receives, from the base station, control information including transport block information and DeModulation Reference Signal (DM-RS) antenna port allocation indication information, checks a number of the transport blocks allocated to the terminal based on the transport block information, and interpreting the DM-RS antenna port allocation indication information according to the number of transport blocks.

Description

Be used for method at wireless communication system indication demodulated reference signal antenna port

Technical field

The present invention relates generally to radio communication; Specifically, relate to the wireless communication system transmission that is used for based on the multicarrier multiple access scheme such as OFDM (OFDMA) and be used for the method for the channel state information reference signals (CSI-RS) of subscriber equipment (UE) with measure channel quality.

Background technology

Be designed to provide the GSM of voice-based service to develop into the wireless packet data communication system that high-speed high-quality wireless data and multimedia service are provided at first.The technology standardization tissue like third generation partner program (3GPP), 3GPP2 and Institute of Electrical and Electric Engineers (IEEE), just is being devoted to improve ultra 3G (beyond-3G) communication technology based on various multicarrier multiple access schemes.For example, 3GPP Long Term Evolution (LTE), 3GPP2 Ultra-Mobile Broadband (UMB) and IEEE802.16m are the mobile communication technology standards based on multicarrier multiple access scheme that is used to support high-speed high-quality wireless packet data transmission service.

Based on the 3G communication system of multicarrier multiple access scheme evolution, like LTE, UMB and 802.16m, adopt various technology, comprise multiple-input and multiple-output (MIMO) beam shaping, adaptive modulation and coding (AMC) and channel sensitive scheduling, to improve efficiency of transmission.These technology improve throughput of system through the transmitted power of concentrated a plurality of antennas or through regulating to send data volume and at first data are sent to the user with good channel quality.Because these technology are operated based on the channel quality information between base station (that is, the Node B of evolution (eNB)) and the mobile radio station (that is, subscriber equipment (UE)), thus this eNB or this UE measure channel quality, and CSI-RS is used to this purpose.

In GSM, time, frequency and power resource are limited.Therefore, along with the resource of distributing to reference signal increases, traffic channel resource reduces, thereby has reduced the data volume that can be sent out.In the case, channel measurement and estimated performance have improved, but throughput of system has but descended.

Therefore, consider throughput of system,, need transmission and Traffic Channel, effectively Resources allocation to reference signal in order to ensure optimum performance.

In the 3-G (Generation Three mobile communication system) standard of evolution, reference signal is divided into two types: common reference signal (CRS) and DRS (Dedicated Reference Signal) (DRS).In 3GPP LTE system, CRS is commonly referred to as specific to the RS of sub-district or common RS, and is received by all UE in the sub-district of an eNB.In order to support that channel estimating and measurement are carried out in the transmission that utilizes a plurality of transmitting antennas, define several reference signal modes, to be used for the differentiation between antenna port.

DRS divides with CRS to open the additional reference signal of transmission, and is sent to the particular UE of being selected by eNB.In 3GPP LTE system, DRS also is called as specific to the RS of UE and is used to support utilize the data traffic channels transmission of carrying out based on the precoding of non-code book.

Among the senior LTE (LTE-A) that comes from LTE evolution, except CRS with the DRS, demodulated reference signal (DM-RS) is used to support to reach 8 layers channel estimating.Similar with DRS, DM-RS separates with the transmission of CRS, sends with the mode specific to UE.

In the LTE-A system, utilize to use the two OFDMA transmission plan transmitted downlink signal of frequency domain and time domain.Downlink band is divided into a plurality of Resource Block (RB) in frequency domain, each RB comprises 12 number of sub-carrier, and in time domain, is divided into a plurality of subframes, and each subframe comprises 14 OFDM symbols.ENB is that unit sends with the radio resource of being made up of one or more RB in frequency domain, in time domain, sends with subframe.Resource units by the definition of a number of sub-carrier of an OFDM symbol duration is called as resource element (RE).

In single user-multiple-input and multiple-output (SU-MIMO) pattern or multi-user-multiple-input and multiple-output (MU-MIMO) pattern, can use multilayer to transmit.For the multilayer transmission, for each layer distributes the DM-RS resource.In the LTE-A system, the DM-RS resource of distributing for the channel estimating of one deck is called as the DM-RS port.At this, term DM-RS resource and DM-RS port can exchange use.

Fig. 1 illustrate be designed be used in the LTE-A system the DM-RS pattern.

With reference to figure 1, the DM-RS pattern of reference number 100 expression orders (rank) 2, wherein in the DM-RS of order 2 pattern, eNB is to two-layer transmission DM-RS.When sending two DM-RS with the DM-RS pattern of the order shown in Fig. 12, these two DM-RS are utilized spreading factor 2 quadrature spread on position 101 and 102, send with code division multiplexing (CDM) group then.In a similar manner, the DM-RS of 103 and 104 transmission quadrature spread in the position.In Fig. 1, continuous blue RE carries DM-RS.Therefore, the DM-RS of two DM-RS antenna ports code division multiplexing (CDMed) on identical frequency and time resource.

In Fig. 1, the DM-RS pattern of reference number 110 expression orders 4, wherein in the DM-RS of order 4 pattern, eNB sends DM-RS to four layers.The DM-RS pattern of this order 4 is also utilized with the DM-RS pattern 100 identical spreading factors 2 of order 2 and is expanded DM-RS, except additional RS is used for four DM-RS antenna ports.Therefore, compare with the DM-RS pattern 100 of order 2, the DM-RS pattern 110 of order 4 has the RE that is used for DM-RS of twice.

In Fig. 1, the DM-RS pattern of reference number 120 expression orders 8, wherein in the DM-RS of order 8 pattern, eNB sends DM-RS to eight layers.DM-RS pattern 120 uses of order 8 are used for DM-RS with the RE of DM-RS pattern 110 similar numbers of order 4 and send.In order to utilize the RE with DM-RS pattern 110 similar numbers of order 4 to come to send DM-RS to eight DM-RS antenna ports, the DM-RS pattern 120 of order 8 utilizes spreading factor 4 to come quadrature spread DM-RS on position 105,106,107 and 108.

Summary of the invention

Technical problem

In the LTE-A system, the order of the signal that is sent by eNB changes with the state of downlink channel.Because the order of the transmission signal of eNB changes, so the DM-RS pattern also changes with the signal order.That is to say that eNB can be used to the DM-RS pattern 120 of order 8 to have the layer of the channel of big figure, and the DM-RS pattern 100 of order 2 is used to have the layer of the channel of peanut.As stated, because the DM-RS pattern changes in time and the DM-RS port of distributing to UE also can change, so eNB should notify the UE to correspondence with DM-RS pattern and DM-RS antenna port, to modulate correct downlink traffic channel.

When maximum 8 DM-RS antenna ports can utilized and support to three DM-RS patterns among Fig. 1, eNB can use the sum-bit of the expression DM-RS pattern of bitmap form to represent eight of DM-RS antenna port DM-RS information to be notified to UE.That is to say,, use 10 altogether in order to give UE with the DM-RS resource notification.The DM-RS pattern of DM-RS pattern and order 8 of DM-RS pattern, order 4 of supposing order 2 is respectively by 00,01 and 02 expression, and eNB can will notify to UE with the DM-RS mode assignments DM-RS antenna port 1 and 2 of order 4 with 01100000 through transmission information 01 so.

Yet the DM-RS resource of using 10 information to be distributed to UE notice is tediously long relatively, thereby has reduced the throughput of system of down link.

Another problem of said method is the DM-RS antenna port information that UE can not obtain other UE.That is to say that UE can only obtain its DM-RS antenna port information.

In the wireless communication system of supporting the MU-MIMO downlink transmission,,, can carry out the effective reception algorithm to this UE so if the transmission to other UE is known on the identical time/frequency resource of particular UE distributing to like the LTE-A system.For the receiver based on least mean-square error (MMSE) operation, this receiver confirms to be used to realize the interference strength of optimum performance.In addition, in order accurately to measure interference strength, this receiver at first determines whether to exist and disturbs.Yet above-mentioned DM-RS resource notification does not provide and disturbs relevant any information to UE.

Therefore, except effective DM-RS resource notification, also need provide other UE to send whether causing interference for information about to UE.

In the LTE-A system, eNB can distribute to single UE with reaching 8 DM-RS antenna ports.Each antenna port allows one of multilayer of the MIMO transmission of this eNB is carried out channel estimating.This eNB uses the physical downlink control channel (PDCCH) that is designed to send control information that the DM-RS antenna port that distributes is notified to UE.Because when eNB carries out MIMO when sending, every layer all needs the DM-RS antenna port to distribute, so the MIMO transmission plan of it and eNB is closely related.That is to say that transmit for the MIMO to three layers, eNB sends and three control informations that the DM-RS antenna port is relevant to one or more UE.

Technical scheme

Based on the problems referred to above at least and make the present invention; And the present invention provides a kind of being used for to send the method that is used in the professional DM-RS resource information of LTE-A system receiving downlink to UE, and this information is distributed to the DM-RS resource of other UE at identical frequency/time resource to this UE notice.

According to an aspect of the present invention, provide a kind of in GSM the control information means of interpretation at terminal.This method comprises: receive the control information that comprises transmission block information and DM-RS antenna port distribution indication information; Distribute to the number of the transmission block at this terminal based on this transmission block information check; And explain that according to the number of transmission block this DM-RS antenna port distributes indication information.

According to a further aspect in the invention, provide a kind of in GSM the control information sending method of base station.This method comprises: the number of the transmission block at terminal is distributed in inspection; Select the DM-RS antenna port to distribute indication information according to the number of transmission block; The control information that generation comprises transmission block information and selected DM-RS antenna port distributes indication information; And this control information sent to this terminal.

According to a further aspect in the invention, a kind of terminal that in GSM, is used to explain the control information that receives from the base station is provided.This terminal comprises: the control information that wireless communication unit, its reception comprise transmission block information and the DM-RS antenna port distributes indication information; And controller, it distributes to the number of the transmission block at this terminal based on this transmission block information check, and explains that according to the number of transmission block this DM-RS antenna port distributes indication information.

According to a further aspect in the invention, a kind of base station of sending control information of in GSM, being used to is provided.This base station comprises: controller; The number of the transmission block at terminal is distributed in its inspection; Select the DM-RS antenna port to distribute indication information according to the number of transmission block, and produce the control information that comprises transmission block information and selected DM-RS antenna port distribution indication information.This base station also comprises wireless communication unit, and it sends to this terminal with this control information.

Useful technique effect

DM-RS antenna port indicating means of the present invention can will be used for the receiving downlink service signal in the LTE-A system DM-RS resource allocation information with notify to UE together about the information of distributing to the DM-RS resource of other UE at identical frequency/time resource, thereby improve systematic function.

Description of drawings

From the detailed description of carrying out below in conjunction with accompanying drawing, above-mentioned and others, the feature and advantage of some embodiment of the present invention will be clearer, in the accompanying drawings:

Fig. 1 is the figure that is illustrated as traditional DM-RS pattern of in the LTE-A system, using and designing;

Fig. 2 is the figure of the control information of on PDCCH, carrying in the LTE-A system, used according to an embodiment of the invention of diagram;

Fig. 3 be diagram according to an embodiment of the invention eNB distribute to this UE and the flow chart of the method for the DM-RS antenna port of other UE of in identical frequency/time resource, being scheduled to UE notice;

Fig. 4 be diagram according to an embodiment of the invention UE number confirm to distribute to this UE based on the DM-RS antenna port allocation index of sending and the flow chart of the method for the DM-RS antenna port of other UE of in identical frequency/time resource, being scheduled by eNB;

Fig. 5 is that diagram is according to an embodiment of the invention for through using the figure that distinguishes the DM-RS pattern that designs between the DM-RS antenna port of two scrambler sequence in the MU-MIMO transmission of using 3 or 4 transport layers;

Fig. 6 is the figure of the control information of on PDCCH, carrying in the LTE-A system, used according to an embodiment of the invention of diagram;

Fig. 7 A and Fig. 7 B be diagram according to an embodiment of the invention eNB to UE notice DM-RS antenna port distribute with the flow chart of the method for disturbing relevant information;

Fig. 8 A and Fig. 8 B be diagram according to an embodiment of the invention UE number confirm to distribute to this UE based on the DM-RS antenna port allocation index of sending and the flow chart of the method for the DM-RS antenna port of other UE of in identical frequency/time resource, being scheduled with the SU/MU-MIMO designator by eNB;

Fig. 9 is the flow chart that diagram is used to distribute the method for DM-RS antenna port according to an embodiment of the invention;

Figure 10 is that diagram is used to obtain the flow chart about the method for the information of the DM-RS antenna port that distributed according to an embodiment of the invention;

Figure 11 is the figure of the control information of on PDCCH, carrying in the LTE-A system, used according to an embodiment of the invention of diagram;

Figure 12 is whether new data indicator (NDI) position that diagram is used to utilize transmission block is according to an embodiment of the invention notified and used application transport to divide the flow chart of the process of collection;

Figure 13 is that to be used to utilize the NDI position of transmission block to notify current transmission according to an embodiment of the invention be initialization or resend and whether application transport is divided the flow chart of the process of collection in diagram; And

Figure 14 is that diagram is used to utilize the NDI position of transmission block whether to notify the flow chart of the process of application of synchronized HARQ according to an embodiment of the invention.

Embodiment

Be described in detail with reference to the attached drawings various embodiment of the present invention below.In institute's drawings attached, use identical reference number to represent identical or similar part.In addition, can omit to the known function that comprises among this paper and the detailed description of structure, to avoid making that theme of the present invention is unclear.

In the LTE-A system, two kinds of MIMO situation are arranged: (1) SU-MIMO situation, wherein eNB distributes to single UE with transport layer; And (2) MU-MIMO situation, wherein eNB distributes to two above UE with transport layer.In the SU-MIMO situation, a UE can be assigned with 1,2,3,4,5,6,7 or 8 transport layer.That is to say that in the SU-MIMO situation, eNB can judge 8 DM-RS antenna ports of distribution as many as according to it.

Yet the MU-MIMO situation will considered enforcement under the restriction of implementing complexity.

1, MU-MIMO can support the transmission to 4 UE of as many as on identical frequency/time resource.

2, MU-MIMO can distribute to single UE for 2 layers with as many as.

3, MU-MIMO can be supported in the transmission of 4 layers of as many as on identical frequency/time resource.That is to say, can distribute one deck or be that each distribution among two UE is two-layer, rather than be that each distribution among three UE is two-layer among four UE each.

SU-MIMO and MU-MIMO can be that unit changes by frequency bandwidth with subframe (1msec) according to the judgement of eNB.In the LTE-A system, the restriction that the as many as that sends for eNB is 4 layers can use 4 combination orders (composite rank) of MU-MIMO to replace.

Transmitting one of relevant restriction with LTE-A and the shared MIMO of LTE system is: on one deck, can only transmit a transmission block.At this, be that the transmission block of unit is sent to physical layer from the upper strata of LTE or LTE-A system with the business information of being transmitted, so that be encoded and modulate.In LTE or LTE-A system, eNB can use identical frequency/time resource that two transmission blocks of as many as are sent to a UE.When sending a transmission block, the corresponding UE that on single layer, this transmission block is sent to; Yet, use at least two layers to send two transmission blocks.

Consider at the restrictive condition of Distribution Layer under MU-MIMO and the SU-MIMO situation and on two or more layers and send two these facts of transmission block; According to one embodiment of the invention, propose a kind ofly the DM-RS antenna port of distributing to UE to be notified to the minimized method of the control information of this UE to being used for.Whether according to another embodiment of the present invention, also propose a kind of eNB will be that the special-purpose MU-MIMO signal of this UE or the part of SU-MIMO signal are notified the method to this UE about the signal that UE receives.When the signal that receives is MU-MIMO signal a part of, notify and the relevant information of DM-RS antenna port of distributing to other UE, make this UE can measure and eliminate interference component.

According to one embodiment of the invention, use with the information of DM-RS antenna port that in LTE and LTE-A system, has used and transmission block and carry out DM-RS antenna port notice.As stated, two transmission blocks can always send on two or more layers.In addition, a transmission block always sends on single layer.When eNB in LTE and LTE-A system sends Traffic Channel, promptly during PDSCH, PDCCH is configured to carry that to be used for the number about transmission block be the control informations that 1 or 2 notices are given UE.According to one embodiment of the invention,, use minimum control information that the DM-RS antenna port is notified to UE through using transmission block information and DM-RS antenna port assignment information.

Fig. 2 illustrates the figure that is carried on the control information on the PDCCH that in the LTE-A system, uses according to an embodiment of the invention.

With reference to figure 2, Reference numeral 230 expression DM-RS antenna port indication informations (can exchange with the DM-RS resource indicator hereinafter and use), it is the part of the control information on PDCCH, transmitted.When receiving PDCCH, UE analyzes DM-RS antenna port indication control information 230 through the control information 210 of reference transmission piece 0 and the control information 220 of transmission block 1.The control information 210 of transmission block 0 comprises the information whether transmission block about correspondence is sent out, if be sent out, then also comprises the information of the size of this transmission block.The control information 220 of transmission block 1 comprises the information whether transmission block about correspondence is sent out, if be sent out, then also comprises the size of this transmission block.The transmission block that eNB can be sent out (being transmission block 0 and transmission block 1 one or both of) notice is given UE.In the LTE-A system, also use Reference numeral 210 and the transmission block 0 of 220 expressions and 1 the control information in the LTE of previous generation system, used by Fig. 2.According to one embodiment of the invention, propose a kind of through use transmission block control information 210 with 220 and DM-RS resource indication information 230 indicate the method for DM-RS antenna port with minimum figure place.

Following table 1 illustrates the message of indicating DM-RS antenna port call number of distributing and the meaning of describing this call number according to an embodiment of the invention.

The DM-RS antenna port of MIMO transmission distributes by notice as follows:

< system features 1 >

1, is directed against 1 ~ 8 layer SU-MIMO transmission

2, the MU-MIMO to 2 layers of the as many as of distributing to a UE transmits

3, to the MU-MIMO of 4 UE of as many as transmission

4, the MU-MIMO to 4 layers of as many as transmits (the greatest combined order of MU-MIMO is 4).

When the DM-RS antenna port that is distributed that will in MU-MIMO transmission, use as eNB was notified to the UE that is scheduled, this eNB also provided the information about the DM-RS antenna port of distributing to other UE that possibly cause interference to identical time/frequency resource.

According to one embodiment of the invention, as shown in table 1, eNB utilizes the DM-RS resource indicator to confirm different DM-RS Resource Allocation Formulas according to the transmission block that will use.

Therefore, this UE explains the call number of being sent by eNB according to the transmission block (that is, transmission block 0, transmission block 1 or transmission block 0 and 1) that will be sent out.For example, if eNB sends to UE with call number value 3, then this UE can be according to transmission block control information 210 with 220 setting and explain the implication of this call number value differently.Suppose that transmission

block control information

210 and 220 is provided so that and only send transmission block 1; Then the DM-RS antenna port 3 that identifies in the DM-RS pattern 110 of order 4 of Fig. 1 of this UE is assigned to this UE; And DM-

RS antenna port

0,1,2 is assigned to other UE, to be used for the MU-MIMO transmission.That is to say, the information that this UE can obtain the information of the DM-RS antenna port that is assigned to other UE that can cause interference potentially and distribute to the DM-RS antenna port of this UE itself, thus effectively alleviate interference.

In order to distribute the DM-RS antenna port based on table 1, as shown in table 1, use the call number of 10 of 4 as many as that identify each transport block transmission.When using table 1, the DM-RS antenna port that in the information field shown in Fig. 2 230, carries 4 distributes and the information relevant with interference.

[table 1]

<table 1: utilize distributing and interference informing of greatest combined order 4 (UE of the common scheduling of 4 quilts of as many as)>for the SU-MIMO transmission of 8 layers of each UE as many as with for the DM-RS antenna port in the MU-MIMO transmission of 2 layers of each UE as many as

First antenna port that DM-RS in the middle of DM-RS antenna port 0 all reference signals of indication (RS) is assigned to.That is to say, from the call number of DM-RS antenna port 0 beginning with any DM-RS antenna port n of ascending order layout.

More particularly, the RS that in LTE and LTE-A system, uses comprises CRS, MBMS broadcasting reference signal, DRS, location reference signals (PRS) and DM-RS.

In the case, antenna port 0 to 3 is assigned to CRS, and antenna port 4 is assigned to MBMS broadcasting reference signal, antenna port 5 is assigned to DRS, and antenna port 6 is assigned to PRS, and antenna port 7 to 14 is assigned to DM-RS.According to one embodiment of the invention, DM-RS antenna port 0 is corresponding to antenna port 7, and DM-RS antenna port 1 is corresponding to antenna port 8, and supposes that this principle is applicable to following description.

Fig. 3 illustrates eNB according to an embodiment of the invention distributes to the flow chart of method from the DM-RS antenna port of this UE and other UE that in identical frequency/time resource, is scheduled to the UE notice.

With reference to figure 3, in step 310, eNB dispatches in specific time/frequency resource.In this scheduling was handled, eNB confirmed the time/frequency resource of UE and the message transmission rate of each UE.In the step 310 of Fig. 3, eNB is set to N by the number of the UE of common scheduling.N=1 representes the SU-MIMO transmission, N=2,3 or 4 expression MU-MIMO transmission.

In step 320, eNB is provided with the call number that the DM-RS antenna port of j UE is distributed in indication.J is the variable that is used between UE, distinguishing.The eNB inspection is by the number of the transmission block of j UE in the middle of the UE of common scheduling.UE can with the number of transmission block be 1 or 2.When sending a transmission block, can send transmission block 0 or transmission block 1.

If judge and only send transmission block 0, then in step 340, select to be used for notifying call number in the call number row that eNB has only transmission block 0 to be activated from table 1 to j UE with the DM-RS port that is assigned with.The call number of wherein having only transmission block 0 to be activated is listed out to be used for indicating when transmission block 0 and is activated and transmission block 1 is distributed to the call number of the DM-RS antenna port of j UE and other UE that is scheduled in identical time/frequency resource when disabled.

If judge and only send transmission block 1, then in step 350, select to be used for notifying call number in the call number row that eNB has only transmission block 1 to be activated from table 1 to j UE with the DM-RS port that is assigned with.The call number of wherein having only transmission block 1 to be activated is listed out to be used for indicating when transmission block 1 and is activated and transmission block 0 is distributed to the call number of the DM-RS antenna port of j UE and other UE that is scheduled in identical time/frequency resource when disabled.

If

judge transmission block

0 and 1 the two all be sent out, then in step 360, select to be used for notifying call number in the call number row that eNB two transmission blocks from table 1 all are activated to j UE with the DM-RS port that is assigned with.The call number that two transmission blocks all are activated in the table 1 is listed out and is used for indicating the call number of distributing to the DM-RS antenna port of j UE and other UE that is scheduled in identical time/frequency resource when transmission block 0 when 1 all is activated.

In step 370, eNB judges whether that all have been assigned with DM-RS antenna port allocation index separately number by the UE of common scheduling, that is, and and j=N.If j equals N, then all have been assigned with DM-RS antenna port allocation index separately number by the UE of common scheduling.If all have been assigned with DM-RS antenna port allocation index number by the UE of common scheduling, then in step 390, eNB number sends to DM-RS antenna port allocation index the UE of the common scheduling of corresponding quilt on PDCCH.Yet, if also there is the UE be not assigned with DM-RS antenna port allocation index number, that is, j N, in step 380, eNB increases progressively 1 with j, and to next by the UE repeating step 330 of common scheduling.

Fig. 4 illustrates UE according to an embodiment of the invention number confirms to distribute to the DM-RS antenna port of this UE and other UE that in identical frequency/time resource, is scheduled based on the DM-RS antenna port allocation index of being sent by eNB the flow chart of method.

With reference to figure 4, in step 405, UE carries out the PDCCH blind decoding.On the PDCCH candidate, carry out blind decoding; Because UE does not know to send the time/frequency resource specific to the PDCCH of this UE above that in LTE and LTE-A system, thereby the PDCCH candidate who does not have crc error that UE will decode confirms as the PDCCH of the control information of carrying it.

After carrying out this blind decoding, in step 410, UE judges whether to receive the downlink scheduling PDCCH specific to this UE.If do not receive the downlink scheduling PDCCH specific to this UE, then in step 405, this UE repeats the PDCCH blind decoding.Yet, when the downlink scheduling PDCCH that receives specific to this UE, in step 415, the down link control information (DCI) among this PDCCH of this UE inspection.This DCI comprises about the control information of

transmission block

0 and 1, DM-RS antenna port assignment information and other control information.

In step 420, UE judges based on 0 control information 210 of the transmission block shown in Fig. 2 and transmission block 1 control information 220 whether transmission block 0 and transmission block 1 one or both of are sent out.

When having only transmission block 0 to be sent out; In step 425; UE has only in the call number row that transmission block 0 is activated search by the call number of DM-RS antenna assignment control information 230 indications of Fig. 2 in table 1, and the message inspection through this call number is detailed is about the information of the DM-RS antenna port that distributed.In addition, UE can check whether this transmission relates to the MU-MIMO transmission of a plurality of UE, and if check that also which DM-RS antenna port is assigned to other UE.

When having only transmission block 1 to be sent out in step 420; In step 430; UE has only in the call number row that transmission block 1 is activated search by the call number of DM-RS antenna assignment control information 230 indications of Fig. 2 in table 1, and the message inspection through this call number is detailed is about the information of the DM-RS antenna port that distributed.In addition, UE can check whether this transmission relates to the MU-MIMO transmission of a plurality of UE, and if check that also which DM-RS antenna port is assigned to other UE.

When the two was sent out when transmission block 0 and transmission block 1, in step 435, search was by the call number of DM-RS antenna assignment control information 230 indications of Fig. 2 in the call number row that UE two transmission blocks in table 1 all are activated.In addition, UE can check whether this transmission relates to the MU-MIMO transmission of a plurality of UE, and if check that also which DM-RS antenna port is assigned to other UE.

In step 440, UE receives the transmission block (being transmission block 0 or transmission block 1) of the correspondence of being sent by eNB, and uses the single DM-RS antenna port that is distributed to estimate this transport layer channel.

In step 445, UE receive the transmission block 0 that sends by eNB with 1 the two, and a plurality of DM-RS antenna ports of being distributed of use are assessed the channel of a plurality of transport layers.

In step 450, UE judges whether other UE is dispatched by common with this UE together on identical time/frequency resource.That is to say that UE judges that the signal that sends to this UE still is in the MU-MIMO transmission, to receive in the SU-MIMO transmission.Can be based on judging that with the checked DM-RS antenna port of distributing to other UE of DM-RS antenna port assignment information this signal still is in the MU-MIMO transmission, to receive in the SU-MIMO transmission about the information of other UE with in step 425,430 and 435.

When the signal specific to this UE be in MU-MIMO transmission, send the time, in step 455, UE detects the signal that sends through the DM-RS antenna port of distributing to other UE, and uses this information to improve its signal receiving performance.For example, in order to improve receptivity, UE can measure the signal strength signal intensity of the DM-RS that sends to other UE, and in the MMSE receiver, uses this measurement result.

When the signal specific to this UE is when in SU-MIMO transmission, sending, in step 460, UE do not having other UE in identical time/frequency resource by the supposition of common scheduling under, handle the signal that receives according to the SU-MIMO reception programme.

After in one of

step

455 and 460, receiving signal, UE turns back to the PDCCH blind decoding in the step 405.

Table 1 is used to support to have the SU-MIMO and the MU-MIMO transmission of the characteristic of listing under top < system features 1 >.Yet, in the LTE-A of reality system, eNB can carry out with < system features 1>in different SU-MIMO of type and MU-MIMO transmission.

According to one embodiment of the invention, following table 2 is used for supporting having the SU-MIMO and the MU-MIMO transmission of the characteristic that following < system features 2>list:

< system features 2 >

1, is directed against 1 ~ 8 layer SU-MIMO transmission

2, the MU-MIMO to 2 layers of the as many as of distributing to a UE transmits

3, to the MU-MIMO of the UE of 2 of as many as transmission

When under the restrictive condition of system features 2, when 2 UE of as many as are dispatched jointly, to compare with table 1, the DM-RS antenna port has distributed with the decreased number of the situation of disturbing relevant information.The transmission block 0 that wherein has only through comparison sheet 2 is activated and wherein has only the minimizing that call number row that transmission block 1 is activated and the manipulative indexing number row of table 1 can be observed the number of situation.

When using table 2 to distribute the DM-RS antenna port, use 4 amount of information to identify the call number of 10 of the as many as of each transmission block transmission situation.That is to say that when using table 2, the DM-RS antenna port that in the field 230 of Fig. 2, carries 4 distributes and the information relevant with interference.

[table 2]

<table 2: utilize distributing and interference informing of greatest combined order 4 (2 quilts of as many as common scheduling UE)>to the SU-MIMO transmission of 8 layers of the as many as of each UE with to the DM-RS antenna port in the MU-MIMO transmission of 2 layers of the as many as of each UE

ENB uses method that table 2 confirms DM-RS antenna port allocation index number with identical with reference to the method for table 1 and Fig. 3 description.In addition, UE receive with the method for explaining DM-RS antenna port allocation index number with identical with reference to the method for table 1 and Fig. 4 description.Therefore, being repeated in this description the method that use table 2 is not provided.

Table 3 illustrates the message of call number of indicating DM-RS antenna port allocation model according to an embodiment of the invention and the meaning of describing this call number.Especially, table 3 is used for notifying the DM-RS antenna port of the MIMO transmission that < system features 1>list to distribute.Yet the method for between the DM-RS pattern, distinguishing and each are used to send aspect the DM-RS of DM-RS antenna port of DM-RS, and table 3 is different from table 2.More particularly, discern the DM-RS of DM-RS pattern and each DM-RS antenna port based on the scrambler sequence in the table 3 that describes below.

When the number of plies of MU-MINO transmission was 3 or 4, eNB was mapped to the DM-RS of frequency division multiplexing (FDM) and code division multiplexing (CDM) each the DM-RS antenna port shown in the order 4DM-RS pattern 110 of Fig. 1.That is to say, be that DM-RS antenna port 0 is sent in 2 Walsh (Walsh) sign indicating number, 0 (+1 ,+1) with length in blue RE, and in red R E, be that 2 walsh code 1 (+1 ,-1) sends DM-RS antenna port 3 with length.Table 3 is 3 or 4 and distinguish the situation of the DM-RS of each DM-RS antenna port with the mode of using scrambler sequence corresponding to the number of plies of the transmission of MU-MIMO wherein.

Another number of plies in MU-MIMO transmission be 3 or the method for 4 o'clock identification DM-RS antenna ports be to use two scrambler sequence.That is to say; When the number of plies of MU-MIMO transmission is 3 or 4; Use additional scrambler sequence to distribute the DM-RS antenna port of 4 of as many as not distribute additional RE, i.e. red R E shown in the order 4DM-RS pattern 110 of Fig. 1 to be used for the MU-MIMO transmission at blue RE place.As a result, this method has identical effect, with utilize two scrambler sequence use order 2DM-RS pattern and each scrambler sequence definition DM-RS antenna port 0 and DM-RS antenna port 1 the two.That is to say, for MU-MIMO with 3 or 4 transport layers, can be by following sign DM-RS antenna port:

1, uses the DM-RS antenna port 0 that utilizes scrambler sequence 0 (SC0) of walsh code 0

2, use the DM-RS antenna port 1 that utilizes scrambler sequence 0 (SC0) of walsh code 1

3, use the DM-RS antenna port 0 that utilizes scrambler sequence 1 (SC1) of walsh code 0

4, use the DM-RS antenna port 1 that utilizes scrambler sequence 1 (SC1) of walsh code 1

In the MU-MIMO transmission of using 3 or 4 transport layers, each scrambler sequence definition DM-RS antenna port 0 and DM-RS antenna port 1 are so that distinguish between the DM-RS antenna port.In addition, when these four kinds of situation being called DM-RS antenna port 0, DM-RS antenna port 1, DM-RS antenna port 2 and DM-RS antenna port 3 respectively, also can expect identical effect.

Fig. 5 illustrates the figure that is designed to be used for the DM-RS pattern between the DM-RS antenna port of the MU-MIMO transmission of using 3 or 4 transport layers, distinguished through using two scrambler sequence according to an embodiment of the invention.

With reference to figure 5, use two scrambler sequence on identical RE, to send the DM-RS of 4 DM-RS antenna ports.

Following table 3 illustrates when use utilizes the DM-RS pattern of two scrambler sequence in the MU-MIMO of combination order 3 or 4 transmission, the message of the call number of use and the meaning of describing this call number in DM-RS antenna port information notice.In table 3, suppose in SU-MIMO transmission scrambler sequence (SC) always 0.

The call number of in DM-RS antenna port information notice, using in the table 3 is identical with the principle of table 1 with the principle of the message of the meaning of describing this call number; Just the MU-MIMO of table 3 be transmitted in the combination order be 3 with used the scrambler sequence of adding at 4 o'clock; And it is different with table 1; Only in the SU-MIMO transmission, just utilize the pattern 110 of Fig. 1 between the DM-RS antenna port, to distinguish; Wherein table 1 is 3 or utilized the pattern 110 of Fig. 1 to distinguish DM-RS antenna port signals at 4 o'clock in the combination order, and with transmission be that SU-MIMO or MIMO transmission are irrelevant.

ENB use table 3 confirms that the method for DM-RS antenna port allocation index number is identical with the method for wherein using table 1 shown in Fig. 3.In addition, UE receives identical with the method for the wherein use table 1 described among the method for explaining DM-RS antenna port allocation index number and Fig. 4.Therefore, with being repeated in this description the same procedure of use table 3 is not provided.

[table 3]

<table 3: utilize distributing and interference informing of greatest combined order 4 (UE of the common scheduling of 4 quilts of as many as)>for the SU-MIMO transmission of 8 layers of each UE as many as with for the DM-RS antenna port in the MU-MIMO transmission of 2 layers of each UE as many as

Reference table 3 for the MU-MIMO transmission of combination order 3 and 4, uses and utilizes the order 2DM-RS pattern of scrambler sequence that 4 DM-RS antenna port signals are distinguished each other.Another method that is used between 4 DM-RS antenna port signals, distinguishing is to be that 4 orthogonal code is applied to order 2DM-RS pattern with length.That is to say that in combination order 3 was transmitted with 4 MU-MIMO, length was that 4 orthogonal code is assigned to the DM-RS antenna port in the order 2DM-RS pattern.In the case, can use the definition of table 1 and table 3.

Distribute for the DM-RS antenna port that uses table 3, uses 4 amount of information to identify the call number of 10 of the as many as of each transport block transmission situation.That is to say, when using table 3, in the field 230 of Fig. 2, carry 4 DM-RS antenna port assignment information and the information relevant with interference.

Table 1,2 and 3 illustrates eNB and notifies the situation to UE with SU-MIMO or MU-MIMO transmission with DM-RS antenna port assignment information.According to one embodiment of the invention; Provide a kind of eNB in the LTE-A system to utilize additional information effectively transmission mode (being SU-MIMO or MU-MIMO) to be notified to UE, DM-RS antenna port assignment information is notified the method for giving UE respectively with the information relevant with interference simultaneously.

Fig. 6 is the figure that the control information of in the LTE-A system, using according to an embodiment of the invention of on PDCCH, carrying is shown.Except with 0 control information 210 of transmission block shown in Fig. 2 and transmission block 1 control information 220 similar transmission block 0 control informations 610 with transmission block 1 control information 620, the last control information of PDCCH also comprises and is used for 1 SU/MU-MIMO designator 630 and the DM-RS antenna port assignment information 640 between SU-MIMO and MU-MIMO transmission, distinguished.

When using SU/MU-MIMO indicating device 630, eNB sends to SU-MIMO transmission to the UE that is scheduled and is set to 0 SU/MU-MIMO designator 630 and is set to 1 SU/MU-MIMO designator to sent to MU-MIMO transmission by the UE of common scheduling.If SU/MU-MIMO designator 630 is set to 0 (promptly using the SU-MIMO transmission) and only distributes a transport layer, this means that then transmission block 0 is sent out.That is to say,, send fixing transmission block, be used for the amount of the control information of DM-RS antenna port distribution with minimizing for the SU-MIMO transmission that utilizes 1 layer.For the SU-MIMO transmission that utilizes 2,3,4,5,6 or 7 layers, sends two transmission blocks, and transmission block 0 is fixed to and is sent out, be used for the amount of the control information of DM-RS antenna port distribution with minimizing.

In addition,, can use two tables, so that eNB sends and UE receives distribution of DM-RS antenna port and interfere information according to the value of SU/MU-MIMO designator 630.

Following table 4 is illustrated in the call number of indication DM-RS antenna port allocation model in the SU-MIMO transmission of using the SU/MU-MIMO designator and the message of the meaning of this call number of description.Especially, table 4 comprises two row, and on behalf of transmission block 0, it be fixed and launch, and each row in these two row comprise two sub-column of representing call number and message.Compare with 3 with table 1,2, in table 4, do not exist transmission block 1 to be sent out and situation that transmission block 0 is not sent out.

Because table 4 is configured to illustrate the DM-RS antenna port assignment information that is used for the SU-MIMO transmission DM-RS antenna port assignment information that is used for the MU-MIMO transmission is not shown, so do not comprise the information relevant with interference.

Table 5 illustrates and when using the SU/MU-MIMO designator, is used to indicate the call number of DM-RS antenna port allocation model and the message of the meaning of describing this call number.Especially, table 5 comprises and disturbs relevant information and DM-RS antenna port assignment information.

Table 4 and table 5 are considered above-mentioned < system features 1 >, and configuration forms.

[table 4]

<table 4: the DM-RS antenna port with SU/>MU-MIMO designator distributes and interference informing (to SU-MIMO)

[table 5]

Divide timing when table 4 being used for the DM-RS antenna port, use 4 amount of information, that is, 3 call numbers that are used to identify 7 of as many as, 1 is used for the SU/MU-MIMO designator.That is to say that when using table 5, the control information shown in Fig. 6 has 1 SU/MU-MIMO designator 630 and 3 DM-RS antenna port distribution and the control information 640 relevant with interference.

Fig. 7 A and Fig. 7 B be illustrate eNB according to an embodiment of the invention to UE notice DM-RS antenna port distribute with the flow chart of the method for disturbing relevant information.UE can utilize this DM-RS antenna port to distribute and distribute in identical frequency/time resource by the DM-RS antenna port of other UE of common scheduling with disturbing relevant information check.

With reference to figure 7A and Fig. 7 B, in step 705, eNB is operation dispatching in specific time/frequency resource.In this scheduling was handled, eNB confirmed the time/frequency resource of UE and the message transmission rate of each UE.In addition, eNB is set to N by the number of the UE of common scheduling.

After scheduling UE, in step 710, eNB judges that whether the number of the UE be scheduled is 1 (promptly whether N=1).If N=1 then uses SU-MIMO; If N>1, then use MU-MIMO.If N=1 (promptly using the SU-MIMO transmission), then in step 715, eNB SU/MU-MIMO designator is set to 0.In step 720, eNB judges whether the number of the transmission block that will in the SU-MIMO pattern, send is 2.If the number of transmission block is 1, then in step 725, eNB selects DM-RS transmission mode call number from the call number row of first situation of table 4.Otherwise if the number of transmission block is 2, then in step 730, eNB selects the DM-RS transmission mode from the call number row of second situation of table 4.In step 735, eNB sends with other control information DM-RS antenna port allocation index number and SU/MU-MIMO designator on PDCCH.Because eNB has confirmed the SU-MIMO transmission, so the SU/MU designator is set to 0.

As N in step 710 (, must be the MU-MINO transmission) greater than 1 the time, eNB SU/MU designator be set to 1 in step 740.Because step 750 to 770 with the step 320 of top Fig. 3 that has described to 370 identical, so the detailed description to the repetition of step 750 to 770 will be provided.

Although step 750 to 770 with the step 320 of Fig. 3 to 370 identical, the step 780 of Fig. 7 is unique, because the SU/MU-MIMO designator that is sent on the PDCCH of each UE is set to 1.In the step 390 of Fig. 3, do not use the SU/MU-MIMO designator, therefore, do not send this indicated value.

Fig. 8 A and Fig. 8 B illustrate UE according to an embodiment of the invention confirms to distribute to the DM-RS antenna port of this UE and other UE that in identical frequency/time resource, is scheduled based on DM-RS antenna port allocation index of being sent by eNB number and SU/MU-MIMO designator the flow chart of method.

With reference to figure 8A, in step 805, UE carries out the PDCCH blind decoding.As stated; PDCCH is carried out blind decoding; This is because UE does not know to send the time/frequency resource specific to the PDCCH of this UE above that in LTE and LTE-A system, thereby the PDCCH candidate who does not have crc error that UE will decode confirms as the PDCCH of the control information of carrying its oneself.

After carrying out blind decoding, in step 810, UE judges whether to receive the downlink scheduling PDCCH specific to this UE.If do not receive the downlink scheduling PDCCH specific to this UE, then in step 805, UE repeats the PDCCH blind decoding.Yet, if receive downlink scheduling PDCCH specific to this UE, in step 815, the DCI among this PDCCH of UE inspection.As shown in Figure 6, this DCI comprises that control information, SU/MU-MIMO designator, the DM-RS antenna port of transmission block 0 and transmission block 1 distribute control information and other control information.

In step 820, UE judges that the SU/MU-MIMO designator of the control information on PDCCH, carry is set to 0 or be set to 1.When the SU/MU-MIMO designator is set to 0, this expression SU-MIMO transmission, and therefore in step 825 UE judge eNB be only send transmission block 0 or send transmission block 0 and transmission block 1 the two.When only sending transmission block 0, in step 830, the DM-RS antenna port that UE search packet in the call number row of a SU-MIMO situation of table 4 is contained in Fig. 6 distributes the call number in the control information field 640.This DM-RS antenna port allocation index number is used to channel estimating.

In step 835, UE carries out channel estimating to the layer that uses the DM-RS antenna port to send, and in step 840, UE utilizes the SU-MIMO method of reseptance to handle the signal that receives.

When in step 825, send transmission block 0 with 1 the two the time, in step 845, UE search packet in the call number row of the 2nd SU-MIMO situation of table 4 is contained in the call number in the DM-RS antenna port distribution control information field 640 of Fig. 6.This DM-RS antenna port allocation index number is used to channel estimating.

In step 850, UE carries out channel estimating to a plurality of layers that use the DM-RS antenna port to send, and in step 840, utilizes the SU-MIMO method of reseptance to handle the signal that receives then.

When the SU/MU-MIMO designator is set to 1 in step 820, this expression MU-MIMO transmission, and therefore in step 855, UE judge eNB be send transmission block 0, be send transmission block 1 or send

transmission block

0 and 1 the two.

When eNB only sent transmission block 0, in step 860, the DM-RS antenna port that UE search packet in the call number row of a MU-MIMO situation of table 5 is contained in Fig. 6 distributed the call number in the control information field 640.In step 865, UE carries out channel estimating to the single layer that the DM-RS antenna port through correspondence sends.In step 870, UE detects other DM-RS antenna port signal under the supposition of a part of MU-MIMO transmission, and through using detected other DM-RS antenna port signal to improve signal receiving performance.

When eNB in step 855 only sent transmission block 1, in step 875, the DM-RS antenna port that UE search packet in the call number row of the 2nd MU-MIMO situation of table 5 is contained in Fig. 6 distributed the call number in the control information field 640.Afterwards, UE carries out step 865 and 870.

When eNB in step 855 send transmission block 0 with 1 the two the time, in step 880, UE search packet in the call number row of the 3rd MU-MIMO situation of table 5 is contained in the call number in the DM-RS antenna port distribution control information field 640 of Fig. 6.In step 885, UE carries out channel estimating to a plurality of layers that the DM-RS antenna port through correspondence sends.Afterwards, UE carry out step 870.

After signal in completing

steps

840 or 870 receives, the PDCCH blind decoding in the UE repeating step 805.

As stated; Table 1,2,3,4 and 5 provide about transmission mode (that is SU-MIMO transmission or MU-MIMO transmission) with distribute to by the information of the DM-RS antenna port of other UE that in MU-MIMO transmits, possibly cause interference of eNB scheduling and the DM-RS antenna port information of distributing to this UE.Information about the DM-RS antenna port of distributing to other UE has advantageously improved the receptivity of the UE that is scheduled, and has increased control information expense efficient.

One embodiment of the invention have proposed to consider whether transmission block 0 and/or transmission block 1 are sent to a UE and do not consider that the DM-RS antenna port of the information relevant with interference distributes.In the case, do not send and disturb relevant information, thereby reduced the amount of control information.

Following table 6 illustrates and is used to indicate the call number of DM-RS antenna port allocation model and the message of the meaning of describing this call number according to an embodiment of the invention.Especially, with table 1,2,3,4 and 5 different, table 6 is designed to eNB and only notifies the information about the DM-RS antenna port of distributing to this UE to object UE.When using table 6, even in the MU-MIMO transmission, eNB does not yet provide and disturbs relevant additional information to UE.

Also, order 4DM-RS pattern considered that < system features 1>designs table 6 under being used to make up the hypothesis of order 3 or 4.

Because eNB uses table 6 to notify the method for the DM-RS that distributes similar with the method for describing with reference to Fig. 3 to UE, so omit detailed description at this.Basically, the method for use table 6 only is that with the method difference of describing with reference to figure 3 eNB notifies the DM-RS antenna port to UE under the situation of not considering to disturb.

Different with the table 1 that 10 DM-RS antenna port allocation index number are provided for each transmission mode, in table 6, for each transmission mode provides 9 DM-RS antenna port allocation index number.The minimizing of call number number means the amount of the information that will send and does not reduce because do not exist with disturbing relevant information.

[table 6]

Table 6: utilize greatest combined order 4 (4 quilts of as many as common scheduling UE) to the SU-MIMO transmission of 8 layers of each UE as many as with to the DM-RS antenna port indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

Following table 7 illustrates and is used to indicate the call number of DM-RS antenna port allocation model and the message of the meaning of describing this call number according to another embodiment of the present invention.With table 1,2,3,4 and 5 different, table 7 is designed to eNB and only notifies the information about the DM-RS antenna port of distributing to corresponding UE to UE.Therefore, similar with table 6 when using table 7, even in the MU-MIMO transmission, eNB does not yet provide and disturbs relevant information to UE.

Also, order 2DM-RS pattern and two scrambler sequence consider < system features 1>under being used to make up the supposition of order 3 or 4.This and table 3 are similar.

Because it is similar with the method for describing with reference to Fig. 3 that eNB use table 7 notifies the DM-RS that is assigned with to the method for UE, so omit detailed description at this.Basically, the difference of the method for use table 7 and the method for describing with reference to Fig. 3 only is that eNB notifies the DM-RS antenna port to UE under situation about not considering from the interference of other UE.

With wherein for each transmission mode provides the table 1 of 10 DM-RS antenna port allocation index number different, in table 7, for each transmission mode provides 8 DM-RS antenna port allocation index number.The minimizing of call number number means that the amount of the information that will be sent out reduces owing to not existing with disturbing relevant information.

Consider figure place, compare (wherein in table 1, using 4) with use table 1, when use table 7, use 3 to come to UE notice DM-RS antenna port assignment information and the information relevant with interference.

[table 7]

Table 7: utilize greatest combined order 4 (4 quilts of as many as common scheduling UE) to the SU-MIMO transmission of 8 layers of each UE as many as with to the DM-RS antenna port indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

When using table 1 to 7 the time, eNB notifies the DM-RS antenna port in the initialization of mixed automatic repeat request (HARQ).

Handle relatively with HARQ, the DM-RS antenna port situation in addition of distributing that needs to list in notification list 1 to the table 7 is used to resend.

In initialization, in the time will sending a transmission block, on single layer, send this transmission block.Yet, in resending, when sending a transmission block,, can on a plurality of layers, resend this transmission block according to the decision of eNB.In order to distribute notice to be used to resend the DM-RS antenna port,, utilize the call number that does not have in the table 1,2,3,4,5,6 and 7 to use to define additional assignment information according to one embodiment of the invention to UE.

As table 7, following table 8 is under order 2DM-RS pattern and two scrambler sequence are used to make up the supposition of order 3 and 4, to consider < system features 1>and design.Especially, with table 1,2,3,4 and 5 different, table 8 is designed so that eNB is only to UE notice DM-RS antenna port.Therefore, when using table 8, even in the MU-MIMO transmission, eNB does not yet provide and disturbs relevant information to UE.

Table 8 is different from table 7 part and is:

1, in table 8,, also can freely distribute in 4 combinations of DM-RS antenna port and scrambler even when one of

transmission block

0 and 1 are sent to UE.That is to say; When sending a transmission block, can distribute in DM-RS antenna port 0 and scrambler sequence 0 combination, DM-RS antenna port 0 and scrambler sequence 1 combination, DM-RS antenna port 1 and scrambler sequence 0 combination and DM-RS antenna port 1 and scrambler sequence 1 combination.The

call number

0,1,2 and 3 of the call number row of first and second transmission modes of table 8 is these situation.

2, in table 8, defined the call number of the additional DM-RS antenna port distribution that can be applied to resending.They are call numbers 4,5,6 and 7 of call number row of first and second transmission modes of table 8.

[table 8]

Table 8: utilize greatest combined order 4 (4 quilts of as many as common scheduling UE) to the SU-MIMO transmission of 8 layers of each UE as many as with to the DM-RS antenna port indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

The table 1 that has 10 call numbers with the call number of each transmission mode row is different, and in table 8, the call number row of each in two transmission modes have 8 call numbers.The call number of each transmission mode row have 8 call numbers in the table 8, and are irrelevant with the number of the transmission block that will send.Therefore, when using table 8,3 are used for the DM-RS antenna port and distribute.Table 8 can only be used for the initialization of HARQ processing and resend with 3 DM-RS antenna port distribution, these are different with table 7, though table 7 also uses 3, do not support to resend.

Have only when sending a transmission block and this transmission block and resend, just can utilize call number 4,5,6 and 7 corresponding DM-RS antenna port assignment information with the call number row of first and second transmission modes of table 8.Relative with it, can be used for initialization with call number 4,5, the 6 and 7 corresponding DM-RS antenna port assignment information of the call number row of first and second transmission modes of table 8 and resend.

First and second transmission modes are mutually the same.Therefore, can be as shown in table 9 express table 8.

In table 9, first and second transmission modes are a transmission mode by unification, but provide identical result.In addition, the call number of listing in the table 9 provides as an example, and not necessarily uses all call numbers shown in it.For example, can omit some call numbers according to implementation method.

[table 9]

Table 9: utilize greatest combined order 4 (4 quilts of as many as common scheduling UE) to the SU-MIMO transmission of 8 layers of each UE as many as with to the DM-RS antenna port indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

As shown in table 9, when sending a transmission block, Maximum Rank is 4, and when order was 1 or 2, scrambler sequence (SC) was 0 or 1, and when order is 3 when above, scrambler sequence (SC) is 0.Similarly, when sending two transmission blocks, Maximum Rank is 8, and when order was 1 or 2, scrambler sequence was 0 or 1, and when order is 3 when above, scrambler sequence (SC) is 0.

In table 9, when in initialization, sending a transmission block, only explain that to order 1 the DM-RS antenna port distributes indication information.When in resending, sending a transmission block, explain that to all orders the DM-RS antenna port distributes indication information.When sending two transmission blocks, explain that to all orders the DM-RS antenna port distributes indication information in initialization or in resending.

Fig. 9 illustrates the flow chart of the method for use table 8 distribution DM-RS antenna port according to an embodiment of the invention.Basically; The number of the transmission block of UE is distributed in the eNB inspection; Select the DM-RS antenna port to distribute indication information according to the number of transmission block; Generation comprises the control information about number of transport blocks purpose information and selected DM-RS antenna port distribution indication information, and the control information that is produced is sent to this UE.

More particularly, with reference to Fig. 9, in step 900, eNB is operation dispatching in subframe.In step 910, it is with one that eNB judges or two transmission blocks send to the UE that is scheduled.According to the number of transmission block, select different call numbers from table 8.If judging, eNB sends two transmission blocks, then the appropriate index of eNB call number column selection DM-RS antenna port assignment information of the 3rd transmission mode from table 8 number in step 950.When sending two transmission blocks, the call number of the call number column selection DM-RS antenna port assignment information of the 3rd transmission mode from table 8, and do not consider that this transmission is initialization or resends.

When sending a transmission block, eNB can be the initialization of this transmission block or resend from the different call number of table 8 selection according to current transmission.Therefore, when eNB in step 910 judged transmission block of transmission, in step 920, eNB judged that this transmission is the initialization of this transmission block or resends.

When current transmission was initialization, in step 940, eNB selected the call number except call number 4,5,6 and 7 from the call number row of first or second transmission mode.Yet when current transmission is when resending, in step 930, eNB selects any one from the call number row of first or second transmission mode.

Figure 10 illustrates use table 8 according to an embodiment of the invention to obtain the flow chart about the method for the information of the DM-RS antenna port that distributed.Basically; UE receives the control information that comprises transmission block information and DM-RS antenna port distribution indication information; Distribute to the number of the transmission block of this UE based on this transmission block information check, and explain that according to the number of transmission block this DM-RS antenna port distributes indication information.

More particularly, with reference to Figure 10, in step 1000, UE carries out the PDCCH blind decoding to the received signal.In step 1010, UE judges whether to receive its downlink scheduling PDCCH.When receiving this downlink scheduling PDCCH, the UE inspection is carried on the DCI on this PDCCH in step 1020.In step 1030, UE judges that the number of the transmission block that is sent out is 1 or 2.When the number of transmission block was 1, in step 1040, UE judged that this transmission is initialization or resends.When this transmission is resending of this transmission block; In step 1050, UE distributes to the DM-RS antenna port of this UE itself based on the call number of the call number of first and second transmission modes of table 8 row with the inspection of the corresponding DM-RS antenna port of this call number assignment information.Yet; When this transmission is the initialization of this transmission block; In step 1060, UE distributes to the DM-RS antenna port of this UE itself based on the call number except call number 4,5,6 and 7 in the call number of first and second transmission modes of table 8 row and with the inspection of the corresponding DM-RS antenna port of this call number assignment information.

When the number of transmission block was 2, in step 1070, UE distributed to the DM-RS antenna port of this UE itself based on the call number of the call number of the 3rd transmission mode in the table 8 row with the corresponding DM-RS antenna assignment of this call number information check.When sending two transmission blocks, can judge the DM-RS antenna port of distributing to this UE and do not consider that this transmission is initialization or resends.

How to judge in the method for Fig. 9 and Figure 10 send be initialization or resend example be NDI position with reference to the control information of sending by eNB because be inverted for new initialization NDI position.That is to say,, then be set to 0 NDI bit reversal to be set to 1 n transmission if send new initialization in (n+1) individual transmission place.Otherwise if this transmission is to resend, then the value of NDI position remains unchanged.

The DM-RS antenna port assignment information that in table 8 and the table 9 each can be used to initialization and in resending is notified to UE.Another method that is used for expression table 8 and table 9 is that each table is decomposed into table that is used for initialization and the table that is used to resend.For example, table 9 can be divided into and is respectively applied for initialization and table 10 that resends and table 11.

[table 10]

Table 10: utilize greatest combined order 3 (4 quilts of as many as common scheduling UE) to the SU-MIMO transmission of 8 layers of each UE as many as with to the DM-RS antenna port indicating means (being used for initialization) in the MU-MIMO transmission of 2 layers of each UE as many as

[table 11]

Table 11: utilize greatest combined order 4 (4 quilts of as many as common scheduling UE) to the SU-MIMO transmission of 8 layers of each UE as many as with to the DM-RS antenna port indicating means (being used to resend) in the MU-MIMO transmission of 2 layers of each UE as many as

Table 8,9,10 and 11 considers that < system information 1>is designed under order 2DM-RS pattern and two scrambler sequence are used to make up the supposition of order 3 or 4.Order 4DM-RS pattern adopts identical < system information 1>characteristic and combination order 3 or 4 and be used, and can as shown in Table 12ly provide the call number and the message of describing this call number that are used to notify the DM-RS antenna port information.

[table 12]

Table 12: utilize greatest combined order 4 (4 quilts of as many as common scheduling UE) to the SU-MIMO transmission of 8 layers of each UE as many as with to the DM-RS antenna port indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

In table 12, the call number 6,7,8 of the call number of first and second transmission modes row and 9 and only be used to resend with the corresponding DM-RS antenna port of this call number assignment messages.For initialization, utilize in the call number row of first and second transmission modes call number except call number 6,7,8 and 9 and distribute with the corresponding message informing DM-RS of this call number antenna port.

Table 12 can be expressed as the table with two transmission modes as table 9, and also can as table 10 and table 11, be divided into two tables that separate that are respectively applied for initialization and resend.

The eNB that table 12 can be used to shown in Fig. 8 A, Fig. 8 B, Fig. 9 and Figure 10 confirms that the DM-RS antenna port assignment information and the UE that will be sent out explain the DM-RS assignment information that receives.

Table 13 illustrates and is used for according to an embodiment of the invention to the call number of UE notice DM-RS antenna port information and the message of the implication of describing this call number.With table 1,2,3,4,5,6 and 7 different, table 13 is designed so that when sending a transmission block, eNB notice DM-RS antenna port assignment information and with disturb relevant information.Table 13 can be used for notifying the DM-RS antenna port of MIMO transmission to distribute.

< system features 3 >

1, is directed against 1 layer SU-MIMO transmission

2, the MU-MIMO to one deck of distributing to a UE transmits

3, to MU-MIMO transmission to 4 UE of as many as

4, the MU-MIMO to 4 layers of as many as transmits (the greatest combined order 4 of MU-MIMO).

[table 13]

Table 13: utilize greatest combined order 4 at the SU that sends a transmission block to each UE and DM-RS antenna port in the MU-MIMO pattern and interference indicating means

The table 1 that has 10 call numbers with each call number row is different, and in table 13, each call number row has 6 call numbers.Through the numerical limitations with the transmission block of each UE is 1 to reduce the call number number in each call number row.Aspect figure place, 4 table 1 is different with using, and table 13 allows eNB only to use 3 to UE notice DM-RS antenna port distribution and the information relevant with interference.

Following table 14 illustrates and is used for according to an embodiment of the invention to the call number of UE notice DM-RS antenna port information and the message of the meaning of describing this call number.With table 1,2,3,4,5,6 and 7 different, table 14 is designed so that when sending a transmission block, eNB notice DM-RS antenna port assignment information and with disturb relevant information.Table 14 is used to notify the DM-RS antenna port of MIMO transmission to distribute, like < system features 3 >.In addition, table 14 is under order 2DM-RS pattern and two scrambler sequence are used to make up the supposition of order 3 or 4, to design.This and table 3 are similar.

The table 1 that has 10 call numbers with each call number row is different, and in table 14, the number of call number is 6 in each call number row.Through the numerical limitations with the transmission block of each UE is 1 to reduce the number of call number in each call number row.Aspect figure place, 4 table 1 is different with using, and table 14 allows eBN only to utilize 3 to UE notice DM-RS antenna port distribution and the information relevant with interference.

[table 14]

Table 14: utilize greatest combined order 4 at the SU that sends a transmission block to each UE and DM-RS antenna port in the MU-MIMO pattern and interference indicating means

In above-mentioned DM-RS antenna port distribution method, mentioned special DM-RS antenna port.For example, when sending

transmission block

0 and 1 with table 7, call number 5 expressions utilize the DM-

RS antenna port

0,1,2,3,4 of scrambler 0 and 5 distribution.Yet the present invention can be applicable to the DM-RS antenna port combination except above-described DM-RS antenna port combination.According to one embodiment of the invention; When in table 7, sending

transmission block

0 and 1 simultaneously, call number 5 can be applied to wherein use scrambler 0 identically and be distributed DM-

RS antenna port

0,1,2,5,6 and 7 rather than the situation of DM-

RS antenna port

0,1,2,3,4 and 5.

Figure 11 is the figure that the control information of in the LTE-A system, using according to an embodiment of the invention of on PDCCH, carrying is shown.

With reference to Figure 11, except the control information of each transmission block is divided into NDI position and other control information, be carried on identical with shown in Fig. 2 of control information on the PDCCH.The control information that

field

1110 and 1120 is carried about transmission block 0, the control information that

field

1130 and 1140 is carried about transmission block 1.More particularly,

NDI field

1120 and 1140 carries whether

expression transmission block

0 and 1 is the control information of the initialization during HARQ handles.When transmission block 0 was not sent out, 0 of NDI can be used for other purpose, rather than was used to notify the initialization of HARQ or resend.

Table 15 illustrates the call number that distribution of DM-RS antenna port and transmission mode are indicated in the NDI position that is used to utilize the transmission block that is not sent out according to an embodiment of the invention.

[table 15]

Table 15: utilize greatest combined order 4 (maximum 4 quilts common scheduling UE) to the SU-MIMO transmission of 8 layers of each UE as many as with to DM-RS antenna port and transmission diversity indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

In table 15, NDIx is the NDI position of the transmission block that is not sent out, and can be used to the transmission mode of UE notice in a transmission block.Table 1 to 14 in, can only transmission mode (being SU-MIMO or MU-MIMO) be notified to UE.In table 15, when only sending a transmission block, can notify further information to UE, such as whether using transmission diversity through the NDI position of using the transmission block be not sent out.When using CRS, can utilize transmission diversity, and according to the number of CRS antenna port can only use empty block code frequently (Space Frequency Block Code, SFBC) or frequency of utilization selectivity transmission diversity (FSTD) and SFBC the two.That is to say, when sending the CRS of two antenna ports, utilize SFBC to dispose transmission diversity automatically, when sending the CRS of four antenna ports, utilize FSTC+SFBC to dispose transmission diversity automatically.On the contrary,, can not utilize transmission diversity if when sending the CRS of individual antenna port, and the therefore single port that sends of configuration automatically.

Table 15 is to using SFBC or using the two situation of FSTD and SFBC to design.In the LTE-A system, can use based on the transmission diversity of DM-RS and based on the transmission diversity of CRS.When using DM-RS, can implement transmission diversity as follows:

1, utilizes the SFBC of DM-

RS antenna port

0 and 1; With

2, utilize the FSTD+SFBC of DM-

RS antenna port

0,1,2 and 3.

Table 16 illustrates NDI position indication DM-RS port and the call number of transmission mode and the message of describing the meaning of this call number of the transmission block that utilization according to an embodiment of the invention is not sent out.

[table 16]

Table 16: utilize greatest combined order 4 (UE of the common scheduling of maximum 4 quilts) to the SU-MIMO transmission of 8 layers of each UE as many as with to DM-RS antenna port and transmission diversity indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

When using table 16, NDI position that can be through using the transmission block that is not sent out is to the information of UE notice about whether utilizing transmission diversity to send this transmission block and use which transmit diversity scheme.

Particularly, table 15 is designed to notify the transmit diversity scheme of utilizing CRS, and table 16 is designed to notify the transmission diversity that utilizes DM-RS.According to another embodiment of the present invention, the two all is supported based on the transmission diversity of CRS with based on the transmission diversity of DM-RS.For support based on the transmission diversity of CRS and based on the transmission diversity of DM-RS the two.Table 15 and table 16 are modified to a table.

Table 17 illustrates the NDI position indication DM-RS port of the transmission block that utilization according to an embodiment of the invention is not sent out and the call number of transmission mode.

When using table 17, whether the NDI position that eNB utilizes the transmission block that is not sent out is to resend and application transport divides collection and DM-RS antenna port to distribute information to the UE notice about sending.When having only a transmission block to be sent out, if the NDI position of the transmission block that is not sent out is set to 0, then this NDI position can be used to divide the use of collection or resending of transmission block to the UE notification transmission.When using table 17, if the NDIx of the transmission block that is not sent out be set to 0 and call number be 0, then transmission diversity is notified to UE.This transmission diversity can be applied to the HARQ initialization and resend the two.For simplified system design, can dispose design, make transmission diversity can be applied to the HARQ initial methods or resend in one.When this transmission diversity only is applied to HARQ when resending, NDIx becomes and is used to judge whether transmission is the value that HARQ resends.

[table 17]

Table 17: utilize greatest combined order 4 (UE of the common scheduling of maximum 4 quilts) to the SU-MIMO transmission of 8 layers of each UE as many as with to DM-RS antenna port and transmission diversity indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

Use table 15,16 and 17, can utilize the NDI position that one of SU-MIMO, MU-MIMO and transmission diversity are notified to UE with DM-RS port assignment information.According to one embodiment of the invention, another purposes of the NDI position of the transmission block that is not sent out is to be used to notify synchronous HARQ.

Call number that the NDI position indication DM-RS port assignment that table 18 illustrates the transmission block that utilization is not sent out and synchronous HARQ transmit and the message of describing the meaning of this call number.

[table 18]

Table 18: utilize greatest combined order 4 (UE of the common scheduling of maximum 4 quilts) to the SU-MIMO transmission of 8 layers of each UE as many as with to DM-RS antenna port and synchronous HARQ indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

Utilize table 18, can will notify to UE about the information whether transmission block sends in synchronous HARQ through the NDI that uses the transmission block that is not sent out.Because resending periodically, synchronous HARQ takes place, so need not send additional PDCCH to resending.Yet synchronous HARQ has shortcoming: it dynamically is not adapted to time dependent wireless channel., can become at wireless channel environment and utilize table 17 to come exercise notice when being suitable for synchronous HARQ supporting the synchronous HARQ of single codeword transmission through design table 18, this causes performance optimization.

Call number that the NDI position indication DM-RS port that table 19 illustrates the transmission block that utilization according to an embodiment of the invention is not sent out and synchronous HARQ transmit and the message of describing the meaning of this call number.

[table 19]

Table 19: utilize greatest combined order 4 (UE of the common scheduling of maximum 4 quilts) to the SU-MIMO transmission of 8 layers of each UE as many as with to DM-RS antenna port and synchronous HARQ indicating means in the MU-MIMO transmission of 2 layers of each UE as many as

Utilize table 19, can synchronous HARQ be sent with whether application transport divides the collection notice to give UE through the NDI that uses the transmission block that is not sent out.In table 19, when the NDI position of the transmission block that is not sent out was set to 0, the call number value can be used to synchronous SU/MU-MIMO or transmission diversity are notified to UE.Table 19 is designed so that the synchronous HARQ among the SU/MU-MIMO can be used for initialization.This is to consider the finite population of call number and select the most effectively result of transmission mode.

Figure 12 illustrates according to an embodiment of the invention NDI position through the transmission block that is not sent out in use table 15 and the table 16 whether application transport divides the collection notice to give the flow chart of the process of UE.

With reference to Figure 12, in step 1200, UE receives PDCCH and inspection is carried on the DCI on the PDCCH.In step 1210, UE judges that the number of the transmission block that is sent out is 1 or 2.When 2 transmission blocks were sent out, in step 1250, UE confirmed to distribute to its DM-RS antenna port based on the DM-RS antenna port indication information 1150 (seeing Figure 11) of the control information on the PDCCH.Otherwise when 1 transmission block was sent out, in step 1220, UE judged that the NDI of the transmission block that is not sent out is set to 0 and still is set to 1.

If the NDI of the transmission block that is not sent out is set to 0, then in step 1230, UE is judged as application transport and divides collection.Otherwise if the NDI of the transmission block that is not sent out is set to 1, then in step 1240, UE is judged as and carries out SU-MIMO or MU-MIMO transmission.Confirm the details that notice is given UE among Figure 12 through reference table 15 and table 16.

Figure 13 is that the NDI position that illustrates according to an embodiment of the invention through the transmission block that is not sent out in the use table 17 is initialization with current transmission or resends and whether application transport divides the collection notice to give the flow chart of the process of UE.

With reference to Figure 13, in step 1300, the UE inspection is carried on the DCI on the PDCCH.In step 1310, UE judges that the number of the transmission block that is sent out is 1 or 2.When 2 transmission blocks were sent out, in step 1350, UE confirmed to distribute to its DM-RS antenna port based on the DM-RS antenna port indication information 1150 (seeing Figure 11) of the control information on the PDCCH.Otherwise when 1 transmission block was sent out in step 1310, in step 1320, UE judged that the NDI of the transmission block that is not sent out is set to 0 and still is set to 1.

If the NDI of the transmission block that is not sent out is set to 0, then in step 1330, it is to resend that UE judges current transmission.Otherwise if the NDI of the transmission block that is not sent out is set to 1, then in step 1340, it is initialization that UE is judged as current transmission.In addition, be set to 0 if be judged as the NDI position of the transmission block that a transmission block is sent out and is not sent out, then UE judges whether that based on DM-RS antenna port indication information 1150 application transport divides collection.Confirm the details that notice is given UE among Figure 13 through reference table 17.

Figure 14 incites somebody to action through the NDI position of the transmission block that is not sent out in the use table 18 whether application of synchronized HARQ notifies the flow chart to the process of UE according to an embodiment of the invention.

With reference to Figure 14, in step 1400, the UE inspection is carried on the DCI on the PDCCH.In step 1410, UE judges that the number of the transmission block that is sent out is 1 or 2.When 2 transmission blocks were sent out, in step 1450, UE confirmed to distribute to the DM-RS antenna port of this UE oneself based on the DM-RS antenna port indication information 1150 (seeing Figure 11) of the control information on the PDCCH.Otherwise when 1 transmission block was sent out, in step 1420, UE judged that the NDI of the transmission block that is not sent out is set to 0 and still is set to 1.

If the NDI of the transmission block that is not sent out is set to 0, then in step 1430, UE is judged as application of synchronized HARQ.Otherwise if the NDI of the transmission block that is not sent out is set to 1, then in step 1440, UE is judged as and uses asynchronous HARQ.Confirm the details that notice is given UE among Figure 14 through reference table 18.

Above-mentioned synchronous HARQ transmission notice method is to downlink transmission, promptly from eNB to UE.Yet this synchronous HARQ transmission notice method also can be applied to up link and produce, promptly from UE to eNB.

As stated; DM-RS antenna port indicating means of the present invention can will be used for the receiving downlink service signal effectively in the LTE-A system DM-RS resource allocation information is notified to UE with the information about the DM-RS resource of distributing to other UE at same frequency/time resource, thereby improves systematic function.

Although do not illustrate among the figure, method according to the above embodiment of the present invention can be by comprising wireless communication unit, that is, the UE or the eNB of reflector and receiver and controller carry out.

For example, UE can comprise the number of wireless communication unit that is used to receive the control information that comprises transmission block information and DM-RS antenna port distribution indication information and the transmission block that is used to use this transmission block information check to distribute to this terminal and explain that according to the number of transmission block this DM-RS antenna port distributes the controller of indication information.

In addition, eNB can comprise the number that is used to check the transmission block of distributing to UE, select DM-RS antenna port assignment information and generation to comprise that transmission block information and selected DM-RS antenna port distribute the controller of indication information and the wireless communication unit that is used for the control information that is produced is sent to this UE according to the number of this transmission block.

Although described specific embodiment of the present invention above in detail; But should be expressly understood that many variations of the basic inventive concept of conspicuous this paper instruction and/or modification also will drop within the spirit and scope of the present invention that in accompanying claims and equivalents thereof, limit concerning the technical staff in field.

Claims

1. the control information means of interpretation at a terminal in GSM comprises:

Receive the control information that comprises transmission block information and demodulated reference signal (DM-RS) antenna port distribution indication information by said terminal;

Distribute to the number of the transmission block at said terminal based on said transmission block information check; And

Explain that according to the number of said transmission block said DM-RS antenna port distributes indication information.

2. method according to claim 1; Wherein, said DM-RS antenna port distributes indication information to comprise to be set to 4 Maximum Rank, and when the number of said transmission block is 1; Comprise scrambler sequence 0 or 1 for order 1 or 2, and for the scrambler sequence 0 of order 3.

3. method according to claim 1; Wherein, said DM-RS antenna port distributes indication information to comprise to be set to 8 Maximum Rank, and when the number of said transmission block is 2; Comprise scrambler sequence 0 or 1 for order 2, and for the scrambler sequence 0 of order 3.

4. method according to claim 1, wherein, explain that according to the number of said transmission block said DM-RS antenna port distributes indication information to comprise:

When the number of said transmission block is 1 and current transmission when being initialization, explain that to order 1 said DM-RS antenna port distributes indication information;

When the number of said transmission block be 1 and current transmission be when resending, explain that to all orders said DM-RS antenna port distributes indication information; And

When the number of said transmission block is 2, for initialization with resend, explain that to all orders said DM-RS antenna port distributes indication information.

5. method according to claim 1, wherein, said control information comprises whether the number that is used for other terminal that is assigned with the one deck at least that is sent by the base station notifies the indication information of giving said terminal more than or equal to 1.

6. method according to claim 1; Wherein, When the number of said transmission block is 1; Said DM-RS antenna port distributes indication information to comprise at least one in the following call number: indication is assigned with the call number of the call number of the DM-RS antenna port 0 of scrambler 0, indication is assigned with the DM-RS antenna port 1 of scrambler 0 in order pattern 2 call number, indication is assigned with the DM-RS antenna port 0 of scrambler 1 in order pattern 2 call number, indication is assigned with the DM-RS antenna port 1 of scrambler 1 in order pattern 2 call number, indication is assigned with scrambler 0 in order pattern 2 DM-RS antenna port 0 and 1, indication is assigned with scrambler 0 in order pattern 4 DM-RS antenna port 0,1 and 2 call number and indication and in order pattern 4, is assigned with the DM-RS antenna port 0,1,2 of scrambler 0 and 3 call number in order pattern 2, and

When the number of said transmission block is 2; Said DM-RS antenna port distributes indication information to comprise at least one in the following call number: indication is assigned with the DM-RS antenna port 0 of scrambler 0 and 1 call number in order pattern 2; Indication is assigned with the DM-RS antenna port 0 of scrambler 0 and 1 call number in order pattern 4; Indication is assigned with the DM-RS antenna port 0 of scrambler and 1 call number in order pattern 2; Indication is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4; 1; 2 and 3 call number; Indication is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 8; 1; 2; 3 and 4 call number; Indication is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 8; 1; 2; 3; 4 and 5 call number; Indication is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 8; 1; 2; 3; 4; 5 and 6 call number and indication are assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 8; 1; 2; 3; 4; 5; 6 and 7 call number

Wherein, said DM-RS antenna port 0 is first antenna port that is dispensed on the central DM-RS of all reference signals (RS), and the DM-RS antenna port n is begun by the ascending order number of indexing from DM-RS antenna port 0 arbitrarily.

7. the control information sending method of a base station in GSM comprises:

Be assigned to the number of the transmission block at a terminal by the inspection of said base station;

Select demodulated reference signal (DM-RS) antenna port to distribute indication information according to the number of said transmission block;

Generation comprises the transmission block information of the number that is used to indicate said transmission block and the control information that said DM-RS antenna port distributes indication information; And

Said control information is sent to said terminal.

8. method according to claim 7; Wherein, said DM-RS antenna port distributes indication information to comprise to be set to 4 Maximum Rank, and when the number of said transmission block is 1; Comprise scrambler sequence 0 or 1 for order 1 or 2, and for the scrambler sequence 0 of order 3.

9. method according to claim 7; Wherein, said DM-RS antenna port distributes indication information to comprise to be set to 8 Maximum Rank, and when the number of said transmission block is 2; Comprise scrambler sequence 0 or 1 for order 2, and for the scrambler sequence 0 of order 3.

10. method according to claim 7, wherein, select said DM-RS antenna port to distribute indication information to comprise:

When the number of said transmission block is 1 and current transmission when being initialization, select the said DM-RS antenna port in the order 1 to distribute indication information;

When the number of said transmission block be 1 and current transmission be when resending, select the said DM-RS antenna port in all orders to distribute indication information; And

When the number of said transmission block is 2, for initialization with resend, all select the said DM-RS antenna port in all orders to distribute indication information.

11. method according to claim 7, wherein, said control information comprises whether the number that is used for other terminal that is assigned with the one deck at least that is sent by the base station notifies the indication information of giving said terminal more than or equal to 1.

12. method according to claim 7; Wherein, When the number of said transmission block is 1; Said DM-RS antenna port distributes indication information to comprise at least one in the following call number: indication is assigned with the call number of the call number of the DM-RS antenna port 0 of scrambler 0, indication is assigned with the DM-RS antenna port 1 of scrambler 0 in order pattern 2 call number, indication is assigned with the DM-RS antenna port 0 of scrambler 1 in order pattern 2 call number, indication is assigned with the DM-RS antenna port 1 of scrambler 1 in order pattern 2 call number, indication is assigned with scrambler 0 in order pattern 2 DM-RS antenna port 0 and 1, indication is assigned with scrambler 0 in order pattern 4 DM-RS antenna port 0,1 and 2 call number and indication and in order pattern 4, is assigned with the DM-RS antenna port 0,1,2 of scrambler 0 and 3 call number in order pattern 2, and

13. a terminal that in GSM, is used to explain the control information that receives from the base station comprises:

The control information that wireless communication unit, its reception comprise transmission block information and demodulated reference signal (DM-RS) antenna port distributes indication information; And

Controller, it distributes to the number of the transmission block at said terminal based on said transmission block information check, and explains that according to the number of said transmission block said DM-RS antenna port distributes indication information.

14. terminal according to claim 13; Wherein, said DM-RS antenna port distributes indication information to comprise to be set to 4 Maximum Rank, and when the number of said transmission block is 1; Comprise scrambler sequence 0 or 1 for order 1 or 2, and for the scrambler sequence 0 of order 3.

15. terminal according to claim 13; Wherein, said DM-RS antenna port distributes indication information to comprise to be set to 8 Maximum Rank, and when the number of said transmission block is 2; Comprise scrambler sequence 0 or 1 for order 2, and for the scrambler sequence 0 of order 3.

16. terminal according to claim 13, wherein, when the number of said transmission block is 1 and current transmission when being initialization, said controller explains that to order 1 said DM-RS antenna port distributes indication information; When the number of said transmission block be 1 and current transmission be when resending, said controller explains that to all orders said DM-RS antenna port distributes indication information; And when the number of said transmission block was 2, for initialization with resend, said controller all was directed against all orders and explains that said DM-RS antenna port distributes indication information.

17. terminal according to claim 13, wherein, said control information comprises whether the number that is used for other terminal that is assigned with the one deck at least that is sent by the base station notifies the indication information of giving said terminal more than or equal to 1.

18. terminal according to claim 13; Wherein, When the number of said transmission block is 1; Said DM-RS antenna port distributes indication information to comprise at least one in the following call number: indication is assigned with the call number of the call number of the DM-RS antenna port 0 of scrambler 0, indication is assigned with the DM-RS antenna port 1 of scrambler 0 in order pattern 2 call number, indication is assigned with the DM-RS antenna port 0 of scrambler 1 in order pattern 2 call number, indication is assigned with the DM-RS antenna port 1 of scrambler 1 in order pattern 2 call number, indication is assigned with scrambler 0 in order pattern 2 DM-RS antenna port 0 and 1, indication is assigned with scrambler 0 in order pattern 4 DM-RS antenna port 0,1 and 2 call number and indication and in order pattern 4, is assigned with the DM-RS antenna port 0,1,2 of scrambler 0 and 3 call number in order pattern 2, and

19. one kind is used to the base station that sends control information, comprises in GSM:

Controller; The number of the transmission block at a terminal is distributed in its inspection; Select demodulated reference signal (DM-RS) antenna port to distribute indication information according to the number of said transmission block, and produce transmission block information that comprises the number that is used to indicate said transmission block and the control information that said DM-RS antenna port distributes indication information; And

Wireless communication unit, it sends to said terminal with said control information.

20. base station according to claim 19; Wherein, said DM-RS antenna port distributes indication information to comprise to be set to 4 Maximum Rank, and when the number of said transmission block is 1; Comprise scrambler sequence 0 or 1 for order 1 or 2, and for the scrambler sequence 0 of order 3.

21. base station according to claim 19; Wherein, said DM-RS antenna port distributes indication information to comprise to be set to 8 Maximum Rank, and when the number of said transmission block is 2; Comprise scrambler sequence 0 or 1 for order 2, and for the scrambler sequence 0 of order 3.

22. base station according to claim 19, wherein, when the number of said transmission block is 1 and current transmission when being initialization, the said DM-RS antenna port that said controller is chosen in the order 1 distributes indication information; When the number of said transmission block be 1 and current transmission be when resending, the said DM-RS antenna port that said controller is chosen in all orders distributes indication information; And when the number of said transmission block was 2, for initialization with resend, the said DM-RS antenna port that said controller all is chosen in all orders distributed indication information.

23. base station according to claim 19, wherein, said control information comprises whether the number that is used for other terminal that is assigned with the one deck at least that is sent by said base station notifies the indication information of giving said terminal more than or equal to 1.

24. base station according to claim 19; Wherein, When the number of said transmission block is 1; Said DM-RS antenna port distributes indication information to comprise at least one in the following call number: indication is assigned with the call number of the call number of the DM-RS antenna port 0 of scrambler 0, indication is assigned with the DM-RS antenna port 1 of scrambler 0 in order pattern 2 call number, indication is assigned with the DM-RS antenna port 0 of scrambler 1 in order pattern 2 call number, indication is assigned with the DM-RS antenna port 1 of scrambler 1 in order pattern 2 call number, indication is assigned with scrambler 0 in order pattern 2 DM-RS antenna port 0 and 1, indication is assigned with scrambler 0 in order pattern 4 DM-RS antenna port 0,1 and 2 call number and indication and in order pattern 4, is assigned with the DM-RS antenna port 0,1,2 of scrambler 0 and 3 call number in order pattern 2, and