CN102754364B

CN102754364B - For indicating the method for demodulated reference signal antenna port in a wireless communication system

Info

Publication number: CN102754364B
Application number: CN201180009005.5A
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: 2015-09-09
Anticipated expiration: 2031-02-11
Also published as: RU2674647C2; RU2015118984A; AU2011215025A1; AU2011215025B2; RU2015118984A3; CA2787834C; CN105187181A; JP2013520066A; JP5993063B2; RU2556078C2; USRE48954E1; CN102754364A; CN105187181B; JP2015188239A; KR20110093564A; KR101688551B1; USRE48935E1; JP5756815B2; RU2012121693A; CA2787834A1

Abstract

The control information means of interpretation used in the mobile communication system comprising terminal and base station, wherein this terminal receives the control information comprising transmission block information and demodulated reference signal (DM-RS) antenna port allocation indication information from this base station, distribute to the number of the transmission block of this terminal based on this transmission block information check, and explain this DM-RS antenna port allocation indication information according to the number of transmission block.

Description

For indicating the method for demodulated reference signal antenna port in a wireless communication system

Technical field

The present invention relates generally to radio communication, specifically, relate to and be used for the channel state information reference signals (CSI-RS) of subscriber equipment (UE) with the method for measure channel quality for sending in the wireless communication system based on the such as multicarrier Multiple Access scheme of OFDM (OFDMA) and so on.

Background technology

Be designed at first provide the mobile communication system of voice-based service to develop into the wireless packet data communication system providing high-speed high-quality wireless data and multimedia service.Technology standardization tissue, as third generation partner program (3GPP), 3GPP2 and Institute of Electrical and Electric Engineers (IEEE), is just being devoted to improve beyond 3G (beyond-3G) communication technology based on various multicarrier Multiple Access scheme.Such as, 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 for supporting high-speed high-quality wireless block data transmission to serve.

Based on the 3G communication system of multicarrier Multiple Access scheme evolution, as LTE, UMB and 802.16m, adopt various technology, comprise multiple-input and multiple-output (MIMO) beam forming, adaptive modulation and coding (AMC) and channel sensitive scheduling, to improve efficiency of transmission.These technology are by concentrating the transmitted power of multiple antenna or improving throughput of system by regulating to send data volume and first data are sent to the user with good channel quality.Because these technology operate based on the channel quality information between base station (that is, the Node B (eNB) of evolution) and mobile radio station (that is, subscriber equipment (UE)), so this eNB or this UE measure channel quality, and CSI-RS is used to this object.

In mobile communication system, time, frequency and power resource are limited.Therefore, along with the resource distributing to reference signal increases, traffic channel resource reduces, thus decreases the data volume that can be sent out.In the case, channel measurement and estimated performance improve, but throughput of system but have dropped.

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

In the 3-G (Generation Three mobile communication system) standard of evolution, reference signal is divided into two classes: collective reference signal (CRS) and DRS (Dedicated Reference Signal) (DRS).In 3GPP LTE system, CRS is commonly referred to as RS specific to community or common RS, and is received by all UE in the community of an eNB.In order to support, to utilizing the transmission of multiple transmitting antenna to carry out channel estimating and measurement, to define several reference signal modes, for the differentiation between antenna port.

DRS is the additional reference signal dividing out transmission with CRS, and is sent to the particular UE selected by eNB.In 3GPP LTE system, DRS is also referred to as RS specific to UE and for supporting the data traffic channels transmission utilizing the precoding based on non-code book to carry out.

Senior LTE(LTE-A coming from LTE evolution) in, except CRS and DRS, the channel estimating of demodulated reference signal (DM-RS) for supporting nearly 8 layers.Similar with DRS, the transmission of DM-RS and CRS separately, sends in the mode specific to UE.

In lte-a system, utilize the OFDMA transmission plan transmitted downlink signal using both frequency-domain and time-domains.Downlink band is divided into multiple Resource Block (RB) in a frequency domain, and each RB comprises 12 subcarriers, and is divided into multiple subframe in the time domain, and each subframe comprises 14 OFDM symbol.ENB sends in a frequency domain in units of the radio resource be made up of one or more RB, sends in the time domain with subframe.The resource units defined by a subcarrier 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, multilayer can be used to transmit.For multilayer transmission, it is each Layer assignment DM-RS resource.In lte-a system, the DM-RS resource that the channel estimating for one deck is distributed is called as DM-RS port.At this, term DM-RS resource and DM-RS port can exchange use.

Fig. 1 illustrate be designed to be used in lte-a system DM-RS pattern.

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

In FIG, reference number 110 represents the DM-RS pattern of order 4, and wherein in the DM-RS pattern of order 4, eNB sends DM-RS for four layers.The DM-RS pattern of this order 4 also utilizes the spreading factor 2 identical with the DM-RS pattern 100 of order 2 to expand DM-RS, except additional RS is used for four DM-RS antenna port.Therefore, compared with the DM-RS pattern 100 of order 2, the DM-RS pattern 110 of order 4 has the RE for DM-RS of twice.

In FIG, reference number 120 represents the DM-RS pattern of order 8, and wherein in the DM-RS pattern of order 8, eNB sends DM-RS for eight layers.The DM-RS pattern 120 of order 8 uses and sends for DM-RS with the RE of the identical number of DM-RS pattern 110 of order 4.Send DM-RS with the RE of the identical number of DM-RS pattern 110 of order 4 for eight DM-RS antenna port in order to utilize, the DM-RS pattern 120 of order 8 utilizes spreading factor 4 to carry out quadrature spread DM-RS on position 105,106,107 and 108.

Summary of the invention

technical problem

In lte-a system, the order of the signal sent by eNB changes with the state of downlink channel.Because the order change of the transmission signal of eNB, so DM-RS pattern also changes with signal order.That is, the DM-RS pattern 120 of order 8 can be used for the layer of the channel with big figure by eNB, and the DM-RS pattern 100 of order 2 is used for the layer of the channel with peanut.As mentioned above, because DM-RS pattern changes in time and the DM-RS port distributing to UE also can change, so DM-RS pattern and DM-RS antenna port should be informed to corresponding UE by eNB, to modulate correct downlink traffic channel.

When the DM-RS pattern of three in Fig. 1 can utilize and support maximum 8 DM-RS antenna port, eNB can use the sum-bit of the expression DM-RS pattern of bitmap form to represent eight of DM-RS antenna port, by DM-RS message notice to UE.That is, in order to by DM-RS resource notification to UE, use altogether 10.Assuming that the DM-RS pattern of the DM-RS pattern of the DM-RS pattern of order 2, order 4 and order 8 represents by 00,01 and 02 respectively, so eNB can inform to UE by transmission information 01 and 01100000 by distributing DM-RS antenna port 1 and 2 with the DM-RS pattern of order 4.

But, use the information of 10 to notify that the DM-RS resource of distributing is relatively tediously long to UE, thus reduce 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, UE can only obtain its DM-RS antenna port information.

In the wireless communication system supporting MU-MIMO downlink transmission, as lte-a system, if be known to the transmission of other UE in the identical time/frequency resource distributing to particular UE, so effective receiving algorithm can be performed for this UE.For the receiver operated based on least mean-square error (MMSE), this receiver determines the interference strength realizing optimum performance.In addition, in order to Measurement accuracy interference strength, first this receiver determines whether there is interference.But above-mentioned DM-RS resource notification does not provide to UE and disturbs relevant any information.

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

In lte-a system, eNB can distribute to single UE by reaching 8 DM-RS antenna port.Each antenna port permission carries out channel estimating to one of multilayer of the MIMO transmission of this eNB.This eNB uses the physical downlink control channel (PDCCH) being designed to send control information that the DM-RS antenna port of distribution is informed to UE.Because when eNB carry out MIMO send time, every layer all needs DM-RS antenna port to distribute, so the MIMO transmission scheme of it and eNB is closely related.That is, for for the MIMO transmission of three layers, eNB sends the control information relevant with three DM-RS antenna port to one or more UE.

technical scheme

The present invention is made based at least the problems referred to above, and the invention provides a kind of method for sending to UE for the DM-RS resource information of receiving downlink business in lte-a system, this information notifies to this UE the DM-RS resource distributing to other UE at identical frequency/time resource.

According to an aspect of the present invention, a kind of control information means of interpretation of terminal is in mobile communication system provided.The method comprises: receive the control information comprising transmission block information and DM-RS antenna port allocation indication information; The number of the transmission block of this terminal is distributed to based on this transmission block information check; And explain this DM-RS antenna port allocation indication information according to the number of transmission block.

According to a further aspect in the invention, a kind of control information sending method of base station is in mobile communication system provided.The method comprises: check the number distributing to the transmission block of terminal; Number according to transmission block selects DM-RS antenna port allocation indication information; Produce the control information comprising transmission block information and selected DM-RS antenna port allocation indication information; And this control information is sent to this terminal.

According to a further aspect in the invention, provide a kind of in mobile communication system for explaining the terminal of the control information received from base station.This terminal comprises: wireless communication unit, and it receives the control information comprising transmission block information and DM-RS antenna port allocation indication information; And controller, it distributes to the number of the transmission block of this terminal based on this transmission block information check, and explains this DM-RS antenna port allocation indication information according to the number of transmission block.

According to a further aspect in the invention, a kind of base station in mobile communication system for sending control information is provided.This base station comprises: controller, it checks the number distributing to the transmission block of terminal, number according to transmission block selects DM-RS antenna port allocation indication information, and produces the control information comprising transmission block information and selected DM-RS antenna port allocation indication information.This base station also comprises wireless communication unit, and this control information is sent to this terminal by it.

advantageous Effects

The DM-RS resource allocation information being used for receiving downlink service signal can be informed to UE together with the information about the DM-RS resource distributing to other UE in identical frequency/time resource by DM-RS antenna port indicating means of the present invention in lte-a system, thus improves systematic function.

Accompanying drawing explanation

Below in conjunction with the detailed description that accompanying drawing carries out, the above-mentioned and other side of some embodiment of the present invention, feature and advantage will clearly, in the accompanying drawings:

Fig. 1 is illustrated as to use and the figure of traditional DM-RS pattern of design in lte-a system;

Fig. 2 is the figure of the control information carried on PDCCH that diagram uses according to an embodiment of the invention in lte-a system;

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

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

Fig. 5 is that diagram is according to an embodiment of the invention in order to by carrying out distinguishing and the figure of the DM-RS pattern designed between the DM-RS antenna port of use two scrambler sequence in the MU-MIMO transmission of use 3 or 4 transport layers;

Fig. 6 is the figure of the control information carried on PDCCH that diagram uses according to an embodiment of the invention in lte-a system;

Fig. 7 A and Fig. 7 B be diagram according to an embodiment of the invention eNB notify that DM-RS antenna port is distributed and the flow chart of method to the relevant information of interference to UE;

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

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

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

Figure 11 is the figure of the control information carried on PDCCH that diagram uses according to an embodiment of the invention in lte-a system;

Figure 12 is the flow chart of diagram according to an embodiment of the invention for utilizing the new data indicator of transmission block (NDI) position to notify the process whether using application transport diversity;

Figure 13 is that diagram is according to an embodiment of the invention for utilizing the NDI position of transmission block to notify that current transmission is initialization or resends and the flow chart of the whether process of application transport diversity; And

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

Embodiment

Below with reference to the accompanying drawings various embodiment of the present invention is described in detail.Make in all of the figs to be denoted by like references same or similar part.In addition, the detailed description to the known function comprised and structure can be omitted herein, to avoid making theme of the present invention unclear.

In lte-a system, have two kinds of MIMO situations: (1) SU-MIMO situation, wherein transport layer is distributed to single UE by eNB; And (2) MU-MIMO situation, wherein transport layer is distributed to two or more UE by eNB.In SU-MIMO situation, a UE can be assigned with 1,2,3,4,5,6,7 or 8 transport layer.That is, in SU-MIMO situation, eNB can judge to distribute as many as 8 DM-RS antenna port according to it.

But MU-MIMO situation will be implemented under the restriction considering enforcement complexity.

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

2, as many as 2 Layer assignment can be given single UE by MU-MIMO.

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

SU-MIMO and MU-MIMO can judging with subframe (1msec) as unit changes by frequency bandwidth according to eNB.In lte-a system, the restriction for the as many as 4 layers of eNB transmission can replace with 4 of MU-MIMO combination order (composite rank).

One of restriction relevant to the MIMO transmission that LTE-A and LTE system share is: can only transmit a transmission block on one deck.At this, the transmission block in units of transmitted business information is sent to physical layer from the upper strata of LTE or lte-a system, to be encoded and to modulate.In LTE or lte-a system, eNB can use identical frequency/time resource that as many as two transmission blocks are sent to a UE.When a transmission transmission block, by corresponding UE that this transmission block is sent on single layer; But, use to least two layers and send two transmission blocks.

Consider the restrictive condition of Distribution Layer in MU-MIMO and SU-MIMO situation and on two or more layers, send this fact of two transmission blocks, according to one embodiment of the invention, propose a kind of to the minimized method of control information for the DM-RS antenna port distributing to UE being informed to this UE.According to another embodiment of the present invention, whether also propose a kind of eNB is the method that the part of the special MU-MIMO signal of this UE or SU-MIMO signal informs to this UE by the signal received about UE.When the signal received is MU-MIMO signal a part of, notifies the information relevant to the DM-RS antenna port distributing to other UE, make this UE can measure and eliminate interference component.

According to one embodiment of the invention, use and carry out DM-RS antenna port notice with the information of the DM-RS antenna port used in LTE and lte-a system and transmission block.As mentioned above, two transmission blocks can always send on two or more layer.In addition, a transmission block always sends on single layer.When in LTE and lte-a system, eNB sends Traffic Channel, namely during PDSCH, PDCCH is configured to carrying for being 1 or 2 control informations informing to UE by the number about transmission block.According to one embodiment of the invention, by using transmission block information and DM-RS antenna port assignment information, use minimum control information that DM-RS antenna port is informed to UE.

Fig. 2 illustrates the figure being carried on the control information on PDCCH used in lte-a system according to an embodiment of the invention.

With reference to figure 2, Reference numeral 230 represents DM-RS antenna port indication information (can exchange with DM-RS resource indicator hereinafter and use), and it is a part for the control information transmitted on PDCCH.When receiving PDCCH, UE analyzes DM-RS antenna port instruction control information 230 by reference to the control information 210 of transmission block 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 (i.e. transmission block 0 and transmission block 1 one or both of) that eNB can be sent out informs UE.The control information of the transmission block 0 and 1 represented by the Reference numeral 210 and 220 of Fig. 2 used in the LTE system of previous generation is also used in lte-a system.According to one embodiment of the invention, propose a kind of by using transmission block control information 210 and 220 and DM-RS resource indication information 230 with the method for minimum figure place instruction DM-RS antenna port.

Table 1 below illustrates the message of the call number indicating DM-RS antenna port to distribute according to an embodiment of the invention and the meaning describing this call number.

The DM-RS antenna port of MIMO transmission is distributed notified as follows:

< system features 1>

1, for the SU-MIMO transmission of 1 ~ 8 layer

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

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

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

When the DM-RS antenna port of distributing used in MU-MIMO transmission is informed to the UE be scheduled by eNB, this eNB also provides about distributing to the information that may cause the DM-RS antenna port of other UE of interference to identical time/frequency resource.

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

Therefore, this UE explains according to the transmission block that will be sent out (that is, transmission block 0, transmission block 1 or transmission block 0 and 1) call number sent by eNB.Such as, if call number value 3 is sent to UE by eNB, then this UE differently can explain the implication of this call number value according to the setting of transmission block control information 210 and 220.Assuming that transmission block control information 210 and 220 is provided so that only to send transmission block 1, the DM-RS antenna port 3 that then this UE identifies in the DM-RS pattern 110 of the order 4 of Fig. 1 is assigned to this UE, and DM-RS antenna port 0,1,2 is assigned to other UE, for MU-MIMO transmission.That is, this UE can obtain the information being assigned to the DM-RS antenna port that can cause the information of the DM-RS antenna port of other UE of interference potentially and distribute to this UE itself, thus effectively alleviates interference.

In order to distribute DM-RS antenna port based on table 1, as shown in table 1, use 4 call numbers identifying the as many as 10 of each transport block transmission.When using table 1, the DM-RS antenna port of carrying 4 in the information field 230 is in fig. 2 distributed and the information relevant to interference.

[table 1]

< table 1: utilize greatest combined order 4(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and in the MU-MIMO transmission of each UE as many as 2 layers DM-RS antenna port distribute and interference notice >

The first day line cap that DM-RS antenna port 0 indicates the DM-RS in the middle of all reference signals (RS) to be assigned to.That is, from DM-RS antenna port 0 with the call number of any DM-RS antenna port n of ascending order layout.

More particularly, the RS used in LTE and lte-a system comprises CRS, MBMS and broadcasts 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 broadcast 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 corresponds to antenna port 7, and DM-RS antenna port 1 corresponds to antenna port 8, and supposes that this principle is applicable to following description.

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

With reference to figure 3, in the step 310, eNB dispatches in specific time/frequency resource.In this dispatch deal, eNB determines 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 by the number of UE jointly dispatched.N=1 represents that SU-MIMO transmits, and N=2,3 or 4 represents MU-MIMO transmission.

In step 320, eNB arranges the call number that the DM-RS antenna port of a jth UE is distributed in instruction.J is the variable for distinguishing between UE.ENB checks by the number of the transmission block of the jth UE in the middle of the UE that jointly dispatches.UE can the number of transmission block be 1 or 2.When a transmission transmission block, transmission block 0 or transmission block 1 can be sent.

If judge only to send transmission block 0, then in step 340, the call number for the DM-RS be assigned with port being informed to a jth UE is selected in the call number row that eNB only has transmission block 0 to be activated from table 1.The call number row wherein only having transmission block 0 to be activated illustrate the call number being used to indicate and distributing to a jth UE and the DM-RS antenna port of other UE be scheduled in identical time/frequency resource when transmission block 0 is activated and transmission block 1 is disabled.

If judge only to send transmission block 1, then in step 350, the call number for the DM-RS be assigned with port being informed to a jth UE is selected in the call number row that eNB only has transmission block 1 to be activated from table 1.The call number row wherein only having transmission block 1 to be activated illustrate the call number being used to indicate and distributing to a jth UE and the DM-RS antenna port of other UE be scheduled in identical time/frequency resource when transmission block 1 is activated and transmission block 0 is disabled.

If judge that both transmission blocks 0 and 1 are all sent out, then in step 360, the call number for the DM-RS be assigned with port being informed to a jth UE is selected in the call number row that eNB two transmission blocks from table 1 are all activated.The call number row that in table 1, two transmission blocks are all activated illustrate the call number being used to indicate and distributing to a jth UE and the DM-RS antenna port of other UE be scheduled in identical time/frequency resource when transmission block 0 is all activated with 1.

In step 370, eNB judges whether allly to be assigned with respective DM-RS antenna port allocation index number by the UE jointly dispatched, that is, j=N.If j equals N, be then allly all assigned with respective DM-RS antenna port allocation index number by the UE jointly dispatched.If all be assigned with DM-RS antenna port allocation index number all by the UE jointly dispatched, then, in step 390, DM-RS antenna port allocation index number sends to corresponding to the UE jointly dispatched by eNB on PDCCH.But if also there is the UE not being assigned with DM-RS antenna port allocation index number, that is, j<N, then in step 380, j is increased progressively 1 by eNB, and by the UE jointly dispatched, step 330 is repeated to the next one.

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

With reference to figure 4, in step 405, UE carries out PDCCH blind decoding.PDCCH candidate carries out blind decoding, because UE does not know the time/frequency resource of the PDCCH sent specific to this UE thereon in LTE and lte-a system, thus the PDCCH candidate of crc error that do not have of decoding is defined as carrying the PDCCH of its control information by UE.

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 PDCCH blind decoding.But when receiving the downlink scheduling PDCCH specific to this UE, in step 415, this UE checks the down link control information (DCI) in this PDCCH.This DCI comprises about the control information of transmission block 0 and 1, DM-RS antenna port assignment information and other control information.

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

When only having transmission block 0 to be sent out, in step 425, the call number indicated by the DM-RS antenna assignment control information 230 of Fig. 2 is searched in the call number row that UE only has transmission block 0 to be activated in Table 1, and by describing the information of message inspection about distributed DM-RS antenna port of this call number in detail.In addition, UE can check whether this transmission relates to the MU-MIMO transmission of multiple UE, and if be, also checks which DM-RS antenna port is assigned to other UE.

When only having transmission block 1 to be sent out in step 420, in step 430, the call number indicated by the DM-RS antenna assignment control information 230 of Fig. 2 is searched in the call number row that UE only has transmission block 1 to be activated in Table 1, and by describing the information of message inspection about distributed DM-RS antenna port of this call number in detail.In addition, UE can check whether this transmission relates to the MU-MIMO transmission of multiple UE, and if be, also checks which DM-RS antenna port is assigned to other UE.

When both transmission block 0 and transmission block 1 are sent out, in step 435, the call number indicated by the DM-RS antenna assignment control information 230 of Fig. 2 is searched in the UE call number row that two transmission blocks are all activated in Table 1.In addition, UE can check whether this transmission relates to the MU-MIMO transmission of multiple UE, and if be, also checks which DM-RS antenna port is assigned to other UE.

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

In step 445, UE receives both the transmission blocks 0 and 1 sent by eNB, and uses multiple DM-RS antenna port of distributing to assess the channel of multiple transport layer.

In step 450, UE judges whether other UE is jointly dispatched together with this UE in identical time/frequency resource.That is, UE judges send to the signal of this UE in SU-MIMO transmission or receive in MU-MIMO transmission.Can based on about other UE information with step 425,430 with in 435 together with DM-RS antenna port assignment information the checked DM-RS antenna port distributing to other UE judge that this signal receives in SU-MIMO transmits or in MU-MIMO transmission.

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

When specific to the signal of this UE be send in SU-MIMO transmission time, in step 460, UE there is no other UE by under the supposition of jointly dispatching in identical time/frequency resource, according to the signal that the process of SU-MIMO reception programme receives.

Receive signal in step 455 and one of 460 after, UE turns back to the PDCCH blind decoding in step 405.

Table 1 is for the SU-MIMO of feature that lists under supporting to have < system features 1> above and MU-MIMO transmission.But in the lte-a system of reality, eNB can carry out the SU-MIMO different from the type in < system features 1> and MU-MIMO transmission.

According to one embodiment of the invention, table 2 is below for supporting SU-MIMO and the MU-MIMO transmission with the feature listed in < system features 2> below:

< system features 2>

1, for the SU-MIMO transmission of 1 ~ 8 layer

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

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

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

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

[table 2]

< table 2: utilize greatest combined order 4(as many as 2 by the UE jointly dispatched) the as many as 8 layers for each UE SU-MIMO transmission and in the MU-MIMO transmission of the as many as 2 layers of each UE DM-RS antenna port distribute and interference notice >

ENB use table 2 determines that the method for DM-RS antenna port allocation index number is with identical with the method that Fig. 3 describes with reference to table 1.In addition, UE receives and explains that the method for DM-RS antenna port allocation index number is identical with the method that Fig. 4 describes with reference table 1.Therefore, the repeated description of the method for use table 2 will do not provided.

Table 3 illustrates the message of the call number indicating DM-RS antenna port allocation model according to an embodiment of the invention and the meaning describing this call number.Especially, table 3 is for notifying that the DM-RS antenna port of the MIMO transmission listed in < system features 1> is distributed.But in the DM-RS carrying out method and each DM-RS antenna port for sending DM-RS distinguished between DM-RS pattern, table 3 is different from table 2.More particularly, based on the DM-RS of the scrambler sequence identification DM-RS pattern in table 3 described below and each DM-RS antenna port.

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

Another identifies that when the number of plies of MU-MIMO transmission is 3 or 4 the method for DM-RS antenna port is use two scrambler sequence.That is, when the number of plies of MU-MIMO transmission is 3 or 4, the DM-RS antenna port using additional scrambler sequence to distribute as many as 4 at blue RE place does not distribute additional RE for MU-MIMO transmission, the red R E namely as shown in the order 4DM-RS pattern 110 of Fig. 1.As a result, the method has identical effect, with utilize two scrambler sequence to use order 2DM-RS pattern and each scrambler sequence definition DM-RS antenna port 0 and DM-RS antenna port 1 both.That is, for the MU-MIMO with 3 or 4 transport layers, can by identifying DM-RS antenna port as follows:

1, use walsh code 0 utilize scrambler sequence 0(SC0) DM-RS antenna port 0

2, use walsh code 1 utilize scrambler sequence 0(SC0) DM-RS antenna port 1

3, use walsh code 0 utilize scrambler sequence 1(SC1) DM-RS antenna port 0

4, use walsh code 1 utilize scrambler sequence 1(SC1) DM-RS antenna port 1

In the MU-MIMO transmission of use 3 or 4 transport layers, each scrambler sequence definition DM-RS antenna port 0 and DM-RS antenna port 1 to distinguish between DM-RS antenna port.In addition, when these four kinds of situations are called DM-RS antenna port 0, DM-RS antenna port 1, DM-RS antenna port 2 and DM-RS antenna port 3, also it is expected to identical effect.

Fig. 5 illustrates the figure be designed to according to an embodiment of the invention for carrying out the DM-RS pattern distinguished between the DM-RS antenna port by use two scrambler sequence in the MU-MIMO transmission of use 3 or 4 transport layers.

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

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

The call number used in DM-RS antenna port message notice in table 3 is identical with the principle of table 1 with the principle of the message of the meaning of this call number of description, just the MU-MIMO transmission of table 3 uses additional scrambler sequence when combination order is 3 and 4, and it is different from table 1, only in SU-MIMO transmission, the pattern 110 of Fig. 1 is just utilized to distinguish between DM-RS antenna port, wherein table 1 utilizes the pattern 110 of Fig. 1 to distinguish DM-RS antenna port signal when combination order is 3 or 4, and is that SU-MIMO or MIMO transmission have nothing to do with transmission.

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

[table 3]

< table 3: utilize greatest combined order 4(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and in the MU-MIMO transmission of each UE as many as 2 layers DM-RS antenna port distribute and interference notice >

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 mutually to distinguish 4 DM-RS antenna port signals.Another for the method carrying out distinguishing between 4 DM-RS antenna port signals be by length be 4 orthogonal code be applied to order 2DM-RS pattern.That is, in the MU-MIMO transmission of combination order 3 and 4, length be 4 orthogonal code be assigned to DM-RS antenna port in order 2DM-RS pattern.In the case, the definition of table 1 and table 3 can be used.

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

Table 1,2 and 3 illustrates that SU-MIMO or MU-MIMO transmission are informed to the situation of UE by eNB together with DM-RS antenna port assignment information.According to one embodiment of the invention, there is provided a kind of eNB in lte-a system to utilize additional information effectively transmission mode (i.e. SU-MIMO or MU-MIMO) to be informed to UE, DM-RS antenna port assignment information and the information relevant to interference are informed the method for UE respectively simultaneously.

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

When using SU/MU-MIMO indicating device 630, eNB to the UE that is scheduled send for SU-MIMO transmission be set to 0 SU/MU-MIMO designator 630 and to being sent the SU/MU-MIMO designator being set to 1 for MU-MIMO transmission by the UE jointly dispatched.Namely SU-MIMO is used to transmit if SU/MU-MIMO designator 630 is set to 0() and only distribute a transport layer, then this means that transmission block 0 is sent out.That is, for utilizing the SU-MIMO of 1 layer to transmit, send fixing transmission block, to reduce the amount of the control information distributed for DM-RS antenna port.For utilizing the SU-MIMO of 2,3,4,5,6 or 7 layers to transmit, send two transmission blocks, and transmission block 0 is fixed to and is sent out, to reduce the amount of the control information distributed for DM-RS antenna port.

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

Table 4 below illustrates in the message using in the SU-MIMO of SU/MU-MIMO designator transmission the meaning indicating the call number of DM-RS antenna port allocation model and describe this call number.Especially, table 4 comprises two row, and it represents transmission block 0 and is fixed and enables, and each row in these two row comprise two the son row representing call number and message.Compare with 3 with table 1,2, in table 4, there is not transmission block 1 and be sent out and the situation that transmission block 0 is not sent out.

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

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

Table 4 and table 5 consider that above-mentioned < system features 1> configuration forms.

[table 4]

< table 4: the DM-RS antenna port with SU/MU-MIMO designator is distributed and interference notice (for SU-MIMO)

[table 5]

< table 5: utilize the DM-RS antenna port of SU/MU-MIMO designator to distribute and interference notice (for MU-MIMO) >

When table 4 being used for DM-RS antenna port and distributing, use the amount of information of 4, that is, 3 for identifying the call number of as many as 7, and 1 for SU/MU-MIMO designator.That is, when using table 5, the control information shown in Fig. 6 has the SU/MU-MIMO designator 630 of 1 and distributes and the control information 640 relevant to interference with the DM-RS antenna port of 3.

Fig. 7 A and Fig. 7 B illustrate that eNB notifies the flow chart of the method for DM-RS antenna port distribution and the information relevant to interference to UE according to an embodiment of the invention.UE can utilize this DM-RS antenna port to distribute and the information check relevant with interference is distributed in identical frequency/time resource by the DM-RS antenna port of other UE of jointly dispatching.

With reference to figure 7A and Fig. 7 B, in step 705, eNB is operation dispatching in specific time/frequency resource.In this dispatch deal, eNB determines the time/frequency resource of UE and the message transmission rate of each UE.In addition, eNB is set to N by by the number of UE jointly dispatched.

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

When N is in step 720 greater than 1 (that is, must be MU-MINO transmission), SU/MU designator is set to 1 by eNB in step 740.Because step 750 is identical to 370 with the step 320 of Fig. 3 described above to 770, so the detailed description of repetition that will do not provide step 750 to 770.

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

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

With reference to figure 8A, in step 805, UE performs PDCCH blind decoding.As mentioned above, blind decoding is performed to PDCCH, this is because UE does not know the time/frequency resource of the PDCCH sent specific to this UE thereon in LTE and lte-a system, thus the PDCCH candidate of crc error that do not have of decoding is defined as carrying the PDCCH of its oneself control information by UE.

After execution 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 PDCCH blind decoding.But if receive the downlink scheduling PDCCH specific to this UE, then, in step 815, UE checks the DCI in this PDCCH.As shown in Figure 6, this DCI comprises the control information of transmission block 0 and transmission block 1, SU/MU-MIMO designator, DM-RS antenna port distribute control information and other control information.

In step 820, UE judges that the SU/MU-MIMO designator of the control information carried on PDCCH is set to 0 or be set to 1.When SU/MU-MIMO designator is set to 0, this represents SU-MIMO transmission, and therefore in step 825 UE judge that eNB only sends both transmission block 0 or transmission transmission block 0 and transmission block 1.When only sending transmission block 0, in step 830, UE search package in the call number row of a 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 835, UE carries out channel estimating to the layer using DM-RS antenna port to send, and in step 840, the signal that UE utilizes the process of SU-MIMO method of reseptance to receive.

When sending both transmission blocks 0 and 1 in step 825, in step 845, UE search package 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 the multiple layers using DM-RS antenna port to send, in step step 840, then utilize the signal that the process of SU-MIMO method of reseptance receives.

When SU/MU-MIMO designator is set to 1 in step 820, this represents MU-MIMO transmission, and therefore in step 855, UE judges that eNB is transmission transmission block 0, is send transmission block 1 or send both transmission blocks 0 and 1.

When eNB only sends transmission block 0, in step 860, UE search package in the call number row of a 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 865, UE carries out channel estimating to the single layer sent by corresponding DM-RS antenna port.In step 870, UE at the signal received be a part for MU-MIMO transmission supposition under detect other DM-RS antenna port signal, and by using other DM-RS antenna port signal of detecting to improve signal receiving performance.

When in step 855, eNB only sends transmission block 1, in step 875, UE search package in the call number row of the 2nd 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.Afterwards, UE carries out step 865 and 870.

When in step 855, eNB sends both transmission blocks 0 and 1, in step 880, UE search package 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 the multiple layers sent by corresponding DM-RS antenna port.Afterwards, UE carry out step 870.

After Signal reception in completing steps 840 or 870, UE repeats the PDCCH blind decoding in step 805.

As mentioned above, table 1,2,3,4 and 5 provide dispatched by eNB about transmission mode (that is, SU-MIMO transmission or MU-MIMO transmission) and distributing to may cause the information of the DM-RS antenna port of other UE of interference and distribute to the DM-RS antenna port information of this UE in MU-MIMO transmission.Information about the DM-RS antenna port distributing to other UE beneficially improves the receptivity of the UE that is scheduled, and adds control information overhead efficiency.

One embodiment of the invention propose considers 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 to interference is distributed.In the case, do not send and disturb relevant information, thus decreasing the amount of control information.

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

Also order 4DM-RS pattern for combine order 3 or 4 hypothesis under consider < system features 1> to design table 6.

Because the method for the DM-RS that eNB uses table 6 to distribute to UE notice is similar with the method described with reference to Fig. 3, describe in detail so omit at this.Substantially, method and the method difference described with reference to figure 3 of use table 6 are only that eNB is not when considering, when disturbing, DM-RS antenna port is informed to UE.

Different from providing the table 1 of 10 DM-RS antenna port allocation index number 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 that the amount of the information that will send reduces because there is not the information relevant to interference.

[table 6]

< table 6: utilize greatest combined order 4(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port indicating means > in the MU-MIMO transmission of each UE as many as 2 layers

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

Also order 2DM-RS pattern and two scrambler sequence for combine order 3 or 4 supposition under consider < system features 1>.This and table 3 are similar.

Because the method that the DM-RS be assigned with is informed to UE by eNB use table 7 is similar with the method described with reference to Fig. 3, describe in detail so omit at this.Substantially, with the difference of the method described with reference to Fig. 3, the method for use table 7 is only that DM-RS antenna port is informed to UE when not considering the interference from other UE by eNB.

From 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 there is not the information relevant to interference.

Consider figure place, (wherein use 4 in Table 1) compared with use table 1, use when use table 73 to come to notify DM-RS antenna port assignment information and the information relevant to interference to UE.

[table 7]

< table 7: utilize greatest combined order 4(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port indicating means > in the MU-MIMO transmission of each UE as many as 2 layers

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

With HARQ process relatively, need the DM-RS antenna port listed in notification list 1 to table 7 distribute beyond situation for resending.

In initialization, when a transmission block will be sent, single layer sends this transmission block.But, in resending, when a transmission transmission block, according to the decision of eNB, this transmission block can be resend on multiple layer.Be used for resending in order to DM-RS antenna port distribution is informed to UE, according to one embodiment of the invention, utilize in table 1,2,3,4,5,6 and 7 assignment information that the call number definition not having to use adds.

As table 7, table 8 below order 2DM-RS pattern and two scrambler sequence for combine order 3 and 4 supposition under consider that < system features 1> designs.Especially, from table 1,2,3,4 and 5 different, table 8 is designed so that eNB only notifies DM-RS antenna port to UE.Therefore, when using table 8, even if in MU-MIMO transmission, eNB does not also provide to UE and disturbs relevant information.

Table 8 is different from table 7 part and is:

1, in table 8, even if when one of transmission block 0 and 1 is sent to UE, in 4 combinations of DM-RS antenna port and scrambler can also freely be distributed.That is, when a transmission transmission block, DM-RS antenna port 0 can be distributed and scrambler sequence 0 combines, DM-RS antenna port 0 and scrambler sequence 1 combines, DM-RS antenna port 1 and scrambler sequence 0 combines and DM-RS antenna port 1 and scrambler sequence 1 combine in one.The call number 0,1,2 and 3 of the call number row of the first and second transmission modes of table 8 is these situations.

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

[table 8]

< table 8: utilize greatest combined order 4(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port indicating means > in the MU-MIMO transmission of each UE as many as 2 layers

To arrange the table 1 with 10 call numbers different from the call number of each transmission mode, and in table 8, the call number of each row in two transmission modes have 8 call numbers.In table 8, the call number row of each transmission mode have 8 call numbers, have nothing to do with the number of the transmission block that will send.Therefore, when using table 8,3 are distributed for DM-RS antenna port.Table 8 can only distribute for the initialization in HARQ process and the DM-RS antenna port that resends with 3, and these are different from table 7, although table 7 also uses 3, do not support to resend.

Only have when transmission transmission block and this transmission block is possibly retransmission time, just can utilize with call number that the call number of the first and second transmission modes of table 8 arranges 4,5,6 and 7 corresponding DM-RS antenna port assignment information.In contrast, with call number that the call number of the first and second transmission modes of table 8 arranges 4,5,6 and 7 corresponding DM-RS antenna port assignment information can be used for initialization 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, the first and second transmission modes are a transmission mode by unification, but are to provide identical result.In addition, the call number listed in table 9 provides as an example, and not necessarily uses all call numbers shown in it.Such as, some call numbers can be omitted according to implementation method.

[table 9]

< table 9: utilize greatest combined order 4(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port indicating means > in the MU-MIMO transmission of each UE as many as 2 layers

As shown in table 9, when a transmission transmission block, maximum order is 4, and when order is 1 or 2, scrambler sequence (SC) is 0 or 1, and when order is more than 3, scrambler sequence (SC) is 0.Similarly, when transmission two transmission blocks, maximum order is 8, and when order is 1 or 2, scrambler sequence is 0 or 1, and when order is more than 3, scrambler sequence (SC) is 0.

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

Fig. 9 illustrates that use table 8 distributes the flow chart of the method for DM-RS antenna port according to an embodiment of the invention.Substantially, eNB checks the number distributing to the transmission block of UE, number according to transmission block selects DM-RS antenna port allocation indication information, produce the control information comprised about number of transport blocks object information and selected DM-RS antenna port allocation indication information, and produced control information is sent to this UE.

More particularly, with reference to Fig. 9, in step 900, eNB is operation dispatching in subframe.In step 910, eNB judges is that one or two transmission blocks are sent to the UE be scheduled.According to the number of transmission block, select different call numbers from table 8.If eNB judges transmission two transmission blocks, then the suitable call number of eNB call number column selection DM-RS antenna port assignment information of the 3rd transmission mode from table 8 in step s 950.When transmission 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 a transmission transmission block, eNB can be the initialization of this transmission block according to current transmission or resend and select different call numbers from table 8.Therefore, when eNB judges a transmission transmission block in step 910, in step 920, eNB judges that this transmission is the initialization of this transmission block or resends.

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

Figure 10 illustrates that use table 8 obtains the flow chart of the method for the information about distributed DM-RS antenna port according to an embodiment of the invention.Substantially, UE receives the control information comprising transmission block information and DM-RS antenna port allocation indication information, distribute to the number of the transmission block of this UE based on this transmission block information check, and explain this DM-RS antenna port allocation indication information according to the number of transmission block.

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

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

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

Each in table 8 and table 9 can be used to initialization and the DM-RS antenna port assignment information in resending to inform to UE.Each table is decomposed into the table that the table and being used for for initialization resends for expressing another method of table 8 and table 9.Such as, table 9 can be divided into and is respectively used to initialization and the table 10 resend and table 11.

[table 10]

< table 10: utilize greatest combined order 3(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for DM-RS antenna port indicating means (for the initialization) > in the MU-MIMO transmission of each UE as many as 2 layers

[table 11]

< table 11: utilize greatest combined order 4(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for DM-RS antenna port indicating means (for the resending) > in the MU-MIMO transmission of each UE as many as 2 layers

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

[table 12]

< table 12: utilize greatest combined order 4(as many as 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port indicating means > in the MU-MIMO transmission of each UE as many as 2 layers

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

Table 12 can be expressed as the table with two transmission modes as table 9, and also can be divided into two tables separated being respectively used to initialization and resending as table 10 and table 11.

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

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

< system features 3>

1, for the SU-MIMO transmission of 1 layer

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

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

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

[table 13]

< table 13: what utilize greatest combined order 4 is sending the DM-RS antenna port in SU and the MU-MIMO pattern of a transmission block and interference indicating means > to each UE

To arrange the table 1 with 10 call numbers different from each call number, and in table 13, each call number row have 6 call numbers.By the number of the transmission block by each UE be restricted to 1 reduce each call number row in call number number.In figure place, different from the table 1 of use 4, table 13 allows eNB only to use 3 to notify that DM-RS antenna port is distributed and the information relevant to interference to UE.

Table 14 below illustrates according to an embodiment of the invention for notifying the call number of DM-RS antenna port information to UE and describing the message of the meaning of this call number.From table 1,2,3,4,5,6 and 7 different, table 14 is designed so that when a transmission transmission block, and eNB notifies DM-RS antenna port assignment information and the information relevant to interference.Table 14 is for notifying that the DM-RS antenna port of MIMO transmission is distributed, as < system features 3>.In addition, table 14 be order 2DM-RS pattern and two scrambler sequence for combine order 3 or 4 supposition under design.This and table 3 are similar.

To arrange the table 1 with 10 call numbers different from each call number, and in table 14, in each call number row, the number of call number is 6.The number that 1 reduces call number in each call number row is restricted to by the number of the transmission block by each UE.In figure place, different from the table 1 of use 4, table 14 allows eBN only to utilize 3 to notify that DM-RS antenna port is distributed and the information relevant to interference to UE.

[table 14]

< table 14: what utilize greatest combined order 4 is sending the DM-RS antenna port in SU and the MU-MIMO pattern of a transmission block and interference indicating means > to each UE

In above-mentioned DM-RS antenna port distribution method, mention special DM-RS antenna port.Such as, when sending transmission block 0 and 1 with table 7, call number 5 represents the distribution utilizing the DM-RS antenna port 0,1,2,3,4 and 5 of scrambler 0.But 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 sending transmission block 0 and 1 in table 7 simultaneously, call number 5 wherein can be used scrambler 0 by being identically applied to and the situation of distributing DM-RS antenna port 0,1,2,5,6 and 7 instead of DM-RS antenna port 0,1,2,3,4 and 5.

Figure 11 is the figure that the control information carried on PDCCH used in lte-a system is according to an embodiment of the invention shown.

With reference to Figure 11, except the control information of each transmission block is divided into except NDI position and other control information, be carried on identical with shown in Fig. 2 of control information on PDCCH.Field 1110 and 1120 carries the control information about transmission block 0, and field 1130 and 1140 carries the control information about transmission block 1.More particularly, NDI field 1120 and 1140 carries and represents that whether transmission block 0 and 1 is the control information of the initialization in HARQ process.When transmission block 0 is not sent out, NDI 0 can be used for other object, instead of for the initialization that notifies HARQ or resend.

Table 15 illustrates the call number according to an embodiment of the invention for utilizing the NDI position of the transmission block be not sent out to indicate DM-RS antenna port distribution and transmission mode.

[table 15]

< table 15: utilize greatest combined order 4(maximum 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port in the MU-MIMO transmission of each UE as many as 2 layers and transmission diversity indicating means >

In table 15, NDIx is the NDI position of the transmission block be not sent out, and can be used to the transmission mode of UE notice in a transmission block.In table 1 is to 14, only transmission mode (i.e. SU-MIMO or MU-MIMO) can be informed to UE.In table 15, when only sending a transmission block, further information can be notified by using the NDI position of the transmission block be not sent out to UE, such as whether using transmission diversity.Can transmission diversity be utilized when using CRS, and only can use both space-frequency block codes (Space Frequency Block Code, SFBC) or frequency of utilization selectivity transmission diversity (FSTD) and SFBC according to the number of CRS antenna port.That is, as the CRS of transmission two antenna ports, utilize SFBC automatically to configure transmission diversity, as the CRS of transmission four antenna ports, utilize FSTC+SFBC automatically to configure transmission diversity.On the contrary, if when sending the CRS of individual antenna port, can not transmission diversity be utilized, and the single port of therefore configuration transmission automatically.

Table 15 is for using SFBC or using the situation of both FSTD and SFBC to design.In lte-a system, the transmission diversity based on DM-RS and the transmission diversity based on CRS can be used.When using DM-RS, transmission diversity can be implemented as follows:

1, the SFBC of DM-RS antenna port 0 and 1 is utilized; With

2, the FSTD+SFBC of DM-RS antenna port 0,1,2 and 3 is utilized.

Table 16 illustrates the message of the meaning utilizing the NDI position of the transmission block be not sent out to indicate the call number of DM-RS port and transmission mode according to an embodiment of the invention and to describe this call number.

[table 16]

< table 16: utilize greatest combined order 4(maximum 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port in the MU-MIMO transmission of each UE as many as 2 layers and transmission diversity indicating means >

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

Particularly, table 15 is designed to the transmit diversity scheme notifying to utilize CRS, and table 16 is designed to the transmission diversity notifying to utilize DM-RS.According to another embodiment of the present invention, based on the transmission diversity of CRS with all supported based on both transmission diversities of DM-RS.In order to support the transmission diversity based on CRS and both the transmission diversities based on DM-RS.Table 15 and table 16 are modified to a table.

Table 17 illustrates the call number of NDI position instruction DM-RS port and the transmission mode utilizing the transmission block be not sent out according to an embodiment of the invention.

When using table 17, whether eNB utilizes the NDI position of the transmission block be not sent out to be resend and the information of whether application transport diversity and DM-RS antenna port distribution to UE notice about sending.When only having a transmission block to be sent out, if the NDI position of the transmission block be not sent out is set to 0, then this NDI position can be used to the use of UE notification transmission diversity or resending of transmission block.When using table 17, if the NDIx of the transmission block be not sent out is set to 0 and call number is 0, then transmission diversity is notified to UE.This transmission diversity can be applied to HARQ initialization and resend the two.In order to simplify system, can design be configured, making transmission diversity can be applied to HARQ initial methods or in resending one.When this transmission diversity be only applied to HARQ resend time, NDIx becomes for judging whether send is the value that HARQ resends.

[table 17]

< table 17: utilize greatest combined order 4(maximum 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port in the MU-MIMO transmission of each UE as many as 2 layers and transmission diversity indicating means >

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

Table 18 illustrates the NDI position instruction DM-RS port assignment of the transmission block that utilization is not sent out and the call number of synchronous HARQ transmission and describes the message of the meaning of this call number.

[table 18]

< table 18: utilize greatest combined order 4(maximum 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port in the MU-MIMO transmission of each UE as many as 2 layers and synchronous HARQ indicating means >

Utilize table 18, can by using the NDI of transmission block that is not sent out by the message notice that whether sends in synchronous HARQ about transmission block to UE.Periodically occur because synchronous HARQ resends, so do not need to send additional PDCCH for resending.But synchronous HARQ has shortcoming: it is not dynamically adapted to time dependent wireless channel.By design table 18 to support the synchronous HARQ of single codeword transmission, can utilize table 17 to perform notice when wireless channel environment becomes and is suitable for synchronous HARQ, this causes performance optimization.

Table 19 illustrates the message of the meaning utilizing the NDI position of the transmission block be not sent out to indicate the call number of DM-RS port and synchronous HARQ transmission according to an embodiment of the invention and to describe this call number.

[table 19]

< table 19: utilize greatest combined order 4(maximum 4 by the UE jointly dispatched) the SU-MIMO for each UE as many as 8 layers transmit and for the DM-RS antenna port in the MU-MIMO transmission of each UE as many as 2 layers and synchronous HARQ indicating means >

Utilizing table 19, by using the NDI of the transmission block be not sent out, synchronous HARQ can be sent with whether application transport diversity informs to UE.In table 19, when the NDI position of the transmission block be not sent out is set to 0, call number value can be used to synchronous SU/MU-MIMO or transmission diversity to inform to UE.Table 19 is designed so that the synchronous HARQ in SU/MU-MIMO can be used for initialization.This be consider call number finite population and select the result of the most effective transmission mode.

Figure 12 illustrates by whether, application transport diversity informs to the flow chart of the process of UE by the NDI position of the transmission block be not sent out in use table 15 and table 16 according to an embodiment of the invention.

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

If the NDI of the transmission block be not sent out is set to 0, then in step 1230, UE is judged as application transport diversity.Otherwise if the NDI of the transmission block be not sent out is set to 1, then in step 1240, UE is judged as performing SU-MIMO or MU-MIMO transmission.The details informing UE in Figure 12 are determined by reference to table 15 and table 16.

Figure 13 illustrates to be initialization by current transmission by the NDI position of the transmission block be not sent out in use table 17 according to an embodiment of the invention or to resend and application transport diversity informs to the process of UE flow chart.

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

If the NDI of the transmission block be not sent out is set to 0, then in step 1330, UE judges that current transmission resends.Otherwise if the NDI of the transmission block be not sent out is set to 1, then in step 1340, UE is judged as that current transmission is initialization.In addition, if be judged as that a transmission block is sent out and the NDI position of the transmission block be not sent out is set to 0, then UE judges whether application transport diversity based on DM-RS antenna port indication information 1150.The details informing UE in Figure 13 are determined by reference to table 17.

Figure 14 is that by the NDI position of the transmission block be not sent out in use table 18, whether by, application of synchronized HARQ informs to the flow chart of the process of UE according to an embodiment of the invention.

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

If the NDI of the transmission block be 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 be not sent out is set to 1, then in step 1440, UE is judged as applying asynchronous HARQ.The details informing UE in Figure 14 are determined by reference to table 18.

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

As mentioned above, DM-RS antenna port indicating means of the present invention can in lte-a system effectively by the DM-RS resource allocation information being used for receiving downlink service signal with about distribute in same frequency/time resource other UE DM-RS resource information together with inform to UE, thus improve systematic function.

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

Such as, UE can comprise wireless communication unit for receiving the control information comprising transmission block information and DM-RS antenna port allocation indication information and for using this transmission block information check distribute to the number of the transmission block of this terminal and explain the controller of this DM-RS antenna port allocation indication information according to the number of transmission block.

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

Although described specific embodiment of the present invention in detail above, but should be expressly understood that, many changes of apparent basic inventive concept of instructing herein the technical staff in field and/or amendment also will be dropped within the spirit and scope of the present invention that limit in claims and equivalents thereof.

Claims

1. a control information means of interpretation for terminal in mobile communication system, comprising:

The control information comprising transmission block information and demodulated reference signal (DM-RS) antenna port allocation indication information is received by described terminal;

The number of the transmission block of described terminal is distributed to based on described transmission block information check; And

Index and the scrambling code information of the number of plies corresponding with described DM-RS antenna port allocation indication information, DM-RS antenna port is explained according to the number of described transmission block.

2. method according to claim 1, wherein, when the number of described transmission block is 1, described DM-RS antenna port allocation indication information comprise be set to 4 maximum order and for the scrambler sequence 0 or 1 of order 1 or 2 and the scrambler sequence 0 for order 3.

3. method according to claim 1, wherein, when the number of described transmission block is 2, described DM-RS antenna port allocation indication information comprise be set to 8 maximum order and for the scrambler sequence 0 or 1 of order 2 and the scrambler sequence 0 for order 3.

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

When the number of described transmission block is 1 and current transmission is initialization, explain described DM-RS antenna port allocation indication information for order 1;

When the number of described transmission block be 1 and current transmission be resend time, explain described DM-RS antenna port allocation indication information for all orders; And

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

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

6. method according to claim 1, wherein, when the number of described transmission block is 1, described DM-RS antenna port allocation indication information comprises at least one in following call number: the call number indicating the DM-RS antenna port 0 being assigned with scrambler 0 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 1 of scrambler 0 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 0 of scrambler 1 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 1 of scrambler 1 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 0 and 1 of scrambler 0 in order pattern 2, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, the call number of 1 and 2 and instruction are assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, 1, the call number of 2 and 3, and

When the number of described transmission block is 2, described DM-RS antenna port allocation indication information comprises at least one in following call number: the call number indicating the DM-RS antenna port 0 and 1 being assigned with scrambler 0 in order pattern 2, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, the call number of 1 and 2, instruction is assigned with the call number of the DM-RS antenna port 0 and 1 of scrambler 1 in order pattern 2, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, 1, the call number of 2 and 3, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 8, 1, 2, the call number of 3 and 4, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 8, 1, 2, 3, the call number of 4 and 5, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 8, 1, 2, 3, 4, the call number of 5 and 6 and instruction are assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 8, 1, 2, 3, 4, 5, the call number of 6 and 7,

Wherein, described DM-RS antenna port 0 is the first day line cap of the DM-RS be dispensed in the middle of all reference signals (RS), and arbitrarily DM-RS antenna port n by from DM-RS antenna port 0 by the ascending order number of indexing.

7. a control information sending method for base station in mobile communication system, comprising:

The number being assigned to the transmission block of a terminal is checked by described base station;

Number according to described transmission block selects demodulated reference signal (DM-RS) antenna port allocation indication information;

Produce and comprise the transmission block information of the number being used to indicate described transmission block and the control information of described DM-RS antenna port allocation indication information; And

Described control information is sent to described terminal,

Wherein, the number of plies corresponding with described DM-RS antenna port allocation indication information, the index of DM-RS antenna port and scrambling code information is pre-determined according to the number of described transmission block.

8. method according to claim 7, wherein, when the number of described transmission block is 1, described DM-RS antenna port allocation indication information comprise be set to 4 maximum order and for the scrambler sequence 0 or 1 of order 1 or 2 and the scrambler sequence 0 for order 3.

9. method according to claim 7, wherein, when the number of described transmission block is 2, described DM-RS antenna port allocation indication information comprise be set to 8 maximum order and for the scrambler sequence 0 or 1 of order 2 and the scrambler sequence 0 for order 3.

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

When the number of described transmission block is 1 and current transmission is initialization, select the described DM-RS antenna port allocation indication information in order 1;

When the number of described transmission block be 1 and current transmission be resend time, select the described DM-RS antenna port allocation indication information in all orders; And

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

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

12. methods according to claim 7, wherein, when the number of described transmission block is 1, described DM-RS antenna port allocation indication information comprises at least one in following call number: the call number indicating the DM-RS antenna port 0 being assigned with scrambler 0 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 1 of scrambler 0 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 0 of scrambler 1 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 1 of scrambler 1 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 0 and 1 of scrambler 0 in order pattern 2, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, the call number of 1 and 2 and instruction are assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, 1, the call number of 2 and 3, and

13. 1 kinds, in mobile communication system for explaining the terminal of the control information received from base station, comprising:

Wireless communication unit, it receives the control information comprising transmission block information and demodulated reference signal (DM-RS) antenna port allocation indication information; And

Controller, it distributes to the number of the transmission block of described terminal based on described transmission block information check, and explains index and the scrambling code information of the number of plies corresponding with described DM-RS antenna port allocation indication information, DM-RS antenna port according to the number of described transmission block.

14. terminals according to claim 13, wherein, when the number of described transmission block is 1, described DM-RS antenna port allocation indication information comprise be set to 4 maximum order and for the scrambler sequence 0 or 1 of order 1 or 2 and the scrambler sequence 0 for order 3.

15. terminals according to claim 13, wherein, when the number of described transmission block is 2, described DM-RS antenna port allocation indication information comprise be set to 8 maximum order and for the scrambler sequence 0 or 1 of order 2 and the scrambler sequence 0 for order 3.

16. terminals according to claim 13, wherein, when the number of described transmission block is 1 and current transmission is initialization, described controller explains described DM-RS antenna port allocation indication information for order 1; When the number of described transmission block be 1 and current transmission be resend time, described controller explains described DM-RS antenna port allocation indication information for all orders; And when the number of described transmission block is 2, for initialization with resend, described controller all explains described DM-RS antenna port allocation indication information for all orders.

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

18. terminals according to claim 13, wherein, when the number of described transmission block is 1, described DM-RS antenna port allocation indication information comprises at least one in following call number: the call number indicating the DM-RS antenna port 0 being assigned with scrambler 0 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 1 of scrambler 0 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 0 of scrambler 1 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 1 of scrambler 1 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 0 and 1 of scrambler 0 in order pattern 2, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, the call number of 1 and 2 and instruction are assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, 1, the call number of 2 and 3, and

19. 1 kinds of base stations in mobile communication system for sending control information, comprising:

Controller, it checks the number distributing to the transmission block of a terminal, number according to described transmission block selects demodulated reference signal (DM-RS) antenna port allocation indication information, and generation comprises the transmission block information of the number being used to indicate described transmission block and the control information of described DM-RS antenna port allocation indication information; And

Wireless communication unit, described control information is sent to described terminal by it,

20. base stations according to claim 19, wherein, when the number of described transmission block is 1, described DM-RS antenna port allocation indication information comprise be set to 4 maximum order and for the scrambler sequence 0 or 1 of order 1 or 2 and the scrambler sequence 0 for order 3.

21. base stations according to claim 19, wherein, when the number of described transmission block is 2, described DM-RS antenna port allocation indication information comprise be set to 8 maximum order and for the scrambler sequence 0 or 1 of order 2 and the scrambler sequence 0 for order 3.

22. base stations according to claim 19, wherein, when the number of described transmission block is 1 and current transmission is initialization, the described DM-RS antenna port allocation indication information in order 1 selected by described controller; When the number of described transmission block be 1 and current transmission be resend time, the described DM-RS antenna port allocation indication information in all orders selected by described controller; And when the number of described transmission block is 2, for initialization with resend, the described DM-RS antenna port allocation indication information in all orders all selected by described controller.

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

24. base stations according to claim 19, wherein, when the number of described transmission block is 1, described DM-RS antenna port allocation indication information comprises at least one in following call number: the call number indicating the DM-RS antenna port 0 being assigned with scrambler 0 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 1 of scrambler 0 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 0 of scrambler 1 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 1 of scrambler 1 in order pattern 2, instruction is assigned with the call number of the DM-RS antenna port 0 and 1 of scrambler 0 in order pattern 2, instruction is assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, the call number of 1 and 2 and instruction are assigned with the DM-RS antenna port 0 of scrambler 0 in order pattern 4, 1, the call number of 2 and 3, and