CN108365942A - Method for transmitting DM-RS pattern and conveyer node - Google Patents

Abstract

The present invention relates to the conveyer nodes for demodulated reference signal mode to be transmitted to using more than two transport layer in resource block in radio circuit in multiple transmitting antennas receiver node (12).Conveyer node (10) includes the mapping circuit (1301) for being configured to multiple code words being mapped to more than two transport layer.In addition, conveyer includes being configured to fixed mode of the basis based on transmission order, each transport layer of more than two transport layer is mapped to the additional mappings circuit (1302) of corresponding demodulated reference signal port.Each demodulation parameter signal port is arranged to addition demodulated reference signal mode to resource block, and demodulated reference signal port is associated with Liang Ge code division multiplexings group according to association mode.The each transport layer of Liang Ge code division multiplexings group carries out code division multiplexing, and the transport layer of different code division multiplexings group carries out frequency division multiplexing.In addition, conveyer node (10) includes being configured to the pre-coding circuit (1303) of each code word and demodulated reference signal mode that precoding is carried by corresponding transport layer and including multiple transmitting antennas and being configured to that the demodulated reference signal mode of precoding is transmitted to the transmitting circuit (1304) of receiver node (12) in resource block.

Description

Method for transmitting DM-RS pattern and conveyer node

Technical field

The present invention relates in radio circuit conveyer node and method therein.Specifically, the present invention relates to And demodulated reference signal mode is transmitted in radio circuit.

Background technology

3rd generation partner program (3GPP) is responsible for universal mobile telecommunications service (UMTS) system and long term evolution (LTE) Standardization.LTE is for realizing that can be based on grouping with the high speed for reaching High Data Rate in uplink in the downlink Communication technology, it is considered as the next generation mobile communication system of UMTS system.The access net of LTE is with being also referred to as evolved universal Net (E-UTRAN) is accessed in face.The first version of LTE is known as the 8th version (Rel-8), it is possible to provide the peak rate of 300 Mbps, example If 5 ms or less radio nets postpone, spectrum efficiency significantly increases and is designed to simplify network operation, reduces cost Deng network architecture.To support High Data Rate, LTE to allow up to the system bandwidth of 20 MHz.LTE also can be in different frequencies It operates, and can be operated at least frequency division duplex (FDD) pattern and time division duplex (TDD) pattern in band.It is used in LTE Modulation technique or transfer scheme are known as orthogonal frequency division multiplexing (OFDM).

For next generation mobile communication system, for example, international mobile telecommunication (IMT) is advanced and/or LTE is advanced（It is LTE Evolution）, the support to the bandwidth for being up to 100 MHz is being discussed.The advanced versions in future that can be considered as LTE standard of LTE, and And since it is the evolution of LTE, backwards compatibility is important so that the advanced LTE that can be deployed in of LTE have been occupied Spectrum in.In LTE the and LTE advanced wireless electricity base station of referred to as evolution NodeB (eNB), it can use and carry precoding/wave beam Forming（beamforming）The mutiple antennas of technology so as to user equipment provide High Data Rate.Therefore, LTE and LTE is advanced is It is capable of providing the example of the radio system of multiple-input and multiple-output (MIMO) technology.Another example of system based on MIMO is complete Ball microwave access mutual operability (WiMAX) system.

The also referred to as predefined training sequence/signal of reference signal (RS), in a wireless communication system extensive use, it is intended to Improve detection performance.It may include conveyer node and receiver node using the basic communication system of reference signal.Conveyer section Point can be indicated by radio base station or user equipment, and receiver node can be indicated by user equipment or radio base station.It passes Device node is sent to may include data block generator, wherein RS is inserted into transmission block.Data block including RS then passes through wireless communication Road is transmitted to receiver node.In addition, predefining RS between conveyer node and receiver node.Therefore, in receiver section Point first passes through and applies channel estimation using RS targets in channel estimator.This channel estimator enables conveyer node Relevant detection is enough carried out so as to the demodulated received signal in channel demodulator, restores data with reliable and appropriate ways.With regard to downlink For link, conveyer node can transmit signal by multiple transmitting antennas, and receiver node can pass through multiple reception days Line receives signal.Indicate that the channel matrix of channel status can be determined by the quantity of transmitting antenna and reception antenna.Line number, which is equal to, to be connect The quantity of antenna is received, and columns is equal to the quantity of transmitting antenna.The transmission order of matrix can be transmitted by wireless channel The maximum quantity of different types of information.Each information of the different types of information transmitted using multiple transmitting antennas can define To be defined as transport layer as stream or following use.

In LTE Rel-10, to reach LTE advanced downlink spectrum efficiency 30bps/Hz, certain advanced Antenna should be used Configuration, for example, 8 × 8 high-order mimos, support to be up to the transmission of 8 transport layers.By multiple transmission and reception antenna transmission and receive number According to when, it is to be understood that channel status between antennas is suitably to receive signal.It correspondingly, should be defined in Rel-10 for height The channel state information (CSI) restored up to the data of 8 transport layers measures and channel demodulation.In LTE Rel-8, cell is specific Channel measurement and channel demodulation both of the reference signal (CRS) for downlink delivery mode 1/2/3/4/5/6, and special RS (DRS) or the specific RS of UE are used for downlink delivery mode 7（I.e. single transport layer beam forming）Channel demodulation.If CRS is used In carrying out the channel measurement in high-order mimo and demodulation, then overhead will inevitably increase, and therefore, throughput performance will Degradation.Therefore, it is that LTE Rel-10 consider two kinds of downlink reference signal：

Channel state information reference signals (CSI-RS) make CSI estimations be used for such as channel quality indicator when needed (CQI) purpose of/precoding matrix indicators (PMI)/transmission order designator (RI) report.This downlink RS is：

Cell is specific

In frequency and it is sparse in the time

In the data area middle punch of common/multicast/broadcast Single Frequency Network (MBSFN) subframe（puncture）.

Demodulated reference signal (DM-RS), the purpose for physical down link sharing channel (PDSCH) demodulation.This downlink Link reference signal is

- UE is specific, that is, the PDSCH and DM-RS for being intended for particular UE will carry out identical pre-encode operation

Only exist to transmit in the transport layer and resource block dispatched in eNodeB

The signal transmitted on different transport layers is mutually orthogonal in eNodeB

8 ports DM-RS in total will be introduced

Herein, embodiment is focusing only in the design of DM-RS.

Fig. 1 shows that the DM-RS pattern for general cyclic prefix (CP) designs.In LTE, radio frame structure includes 10 The subframe of a 1 ms.One subframe includes the time slot of two 0.5 ms.One time slot includes multiple orthogonal frequencies in time-domain The multiple resource block RB being multiplexed in (OFDM) symbol and frequency domain.One resource block is shown in FIG. 1, and is defined on along x-axis Symbol in and in the frequency along y-axis.Resource block is included in 12 loads sent during a transmission interval (TTI) Wave, a transmission interval are to transmit the time of a subframe.Each time slot includes seven symbols.Resource block includes multiple moneys Source unit.Resource unit (RE) is the minimum unit in OFDM, and is the OFDM symbol transmitted on a carrier wave.Show The transmission order 1-4 DM-RS patterns for general cyclic prefix (CP) are exemplified, and support to be up to 4 transport layers, that is, in total Define 4 ports DM-RS.In short, 12 resource units are provided as DM-RS expenses in total per transport layer, it is labeled as in Fig. 1 ' 1 ' or ' 2 '.Different subcarrier in two code division multiplexing (CDM) group's acquisition frequency domains, that is, CDM+ frequency division multiplexings (FDM) are made For basic multiplexing scheme.Each CDM groups cover (orthogonal using the orthogonal code that each length in the time domain is 2 Code cover, OCC) with multiplexing up to two transport layers.In the case of up to 2 transport layers, CDM groups 1 are only existed, such as Indicated with ' 1 '.

In LTE Rel-10, in single user spatial reuse, it can be transmitted per downlink component carrier in subframe UE of up to two transmission blocks to scheduling.Each transmission block is assigned with modulation and the encoding scheme of their own.In addition, transmission block with Code word (CW) is associated, and is transmitted layer mapping according to mapped mode.Derived from the channel coding ratio of identical information bit block Spy is commonly referred to as " code word ".In more transmitting antenna devices or system, gained code word is then modulated and is distributed in transmitting antenna On to transmit.Precoding is that multiple antennas is combined to transmit the mainstream technology used.Basic principle involved in precoding is mixing And the distributed modulation symbol on antenna, while current channel condition may also be taken into account.Precoding can for example pass through by The information of symbolic vector of the carrying comprising modulation symbol, which is multiplied by, is chosen so as to the matrix of match channels to realize.The sequence of symbolic vector Therefore row form the collection of parallel symbol stream, and each such symbol stream is commonly referred to as " transport layer ".Therefore, according in special reality In existing depending on the selection of precoder, transport layer can correspond directly to some antenna or transport layer can through precoder mapping It is distributed on also referred to as several antennas of antenna port.The machine that codeword assignment to special transport layer is used in such systems System referred to as " maps ", or more specifically, referred to as " code word to transport layer maps ".

However, receiver node may not be able to demodulate the data transmitted by multiple transport layers.

Invention content

The purpose of embodiment herein is to provide a kind of transport layers enabling different transmission orders in an efficient way to demodulation ginseng The mechanism for examining signal mapping, so that receiver node can demodulate the data of transmission.

According to embodiment herein in a first aspect, providing a kind of method in conveyer node.This method is used for Demodulated reference signal mode is transmitted to receiver section in resource block using more than two transport layer in multiple transmitting antennas Point.Conveyer node and receiver node are included in radio circuit.

Multiple code words are mapped to more than two transport layer by conveyer node.Conveyer node is also according to based on transmission order Each transport layer of more than two transport layer is mapped to corresponding demodulated reference signal port by fixed mode.Each demodulation parameter letter Demodulation parameter signal mode is added to resource block in number port, and the demodulated reference signal port is associated with two according to association mode Code division multiplexing group.The transport layer of each code division multiplexing group carries out code division multiplexing, and the transmission of different code division multiplexings group Layer carries out frequency division multiplexing.

The each code word and demodulated reference signal mode that conveyer precoding is carried by corresponding transport layer, and in resource The demodulated reference signal mode of precoding is transmitted to receiver node in block.

To execute this method, conveyer node provide herein in radio circuit in multiple transmission days Demodulated reference signal mode is transmitted to receiver node in resource block using more than two transport layer on line.

Conveyer node includes the mapping circuit for being configured to multiple code words being mapped to more than two transport layer.In addition, passing It includes being configured to be mapped to each transport layer of more than two transport layer according to the fixed mode based on transmission order to send device node The additional mappings circuit of corresponding demodulated reference signal port.Each demodulated reference signal port addition demodulated reference signal mode arrives Resource block, the demodulated reference signal port are associated with Liang Ge code division multiplexings group according to association mode.Each code division multiplexing group The transport layer of group carries out code division multiplexing, and the transport layer of different code division multiplexings group carries out frequency division multiplexing.Conveyer node is also Pre-coding circuit including being arranged to each code word and demodulated reference signal mode that precoding is carried by corresponding transport layer.

Conveyer node also includes transmitting circuit, and transmitting circuit includes multiple transmitting antennas and is configured in resource block The demodulated reference signal mode of precoding is transmitted to receiver node.

Inventive solution provides public or fixed mapping between the port transport layer to demodulated reference signal (DM-RS) Pattern, to enabled effectively mapping.Embodiment enables receiver node to demodulate the data of transmission as a result,.

In some embodiments, using the mapping principle mapped in referred to herein as code word (CW), so that two code word mappings To different code division multiplexings (CDM) group to realize that exceeding transmission order 2 transmits.In the channel estimation of the every transport layer of application, this is reflected Principle is penetrated to can avoid interfering between code word.

In some embodiments, using the mapping principle mapped between referred to as CW, with as far as possible will be related with a code word Transport layer is assigned to Liang Ge CDM groups.These embodiments of mapping have the advantages that simply to follow DM-RS port numberings.

Some embodiments herein provide mapping transport layer to the mode of demodulated reference signal, for no matter using single User's (SU) situation or multi-user (MU) situation are transparent.

Description of the drawings

Embodiment will be more fully described about attached drawing now, wherein：

Fig. 1 is the schematic overview for describing resource block,

Fig. 2 is the schematic overview of conveyer node and receiver node,

Fig. 3 is schematic overview of the code word to the mapped mode of transport layer,

Fig. 4 is the schematic overview for describing resource block,

Fig. 5 is the block diagram for the embodiment for describing this solution,

Fig. 6 be according to the schematic overview of the mapped mode of some embodiments of this solution,

Fig. 7 be according to the schematic overview of the mapped mode of some embodiments of this solution,

Fig. 8 is the block diagram of the mapping of the user equipment of combined dispatching,

Fig. 9 be according to the schematic overview of the mapped mode of some embodiments of this solution,

Figure 10 be according to the schematic overview of the mapped mode of some embodiments of this solution,

Figure 11 is the block diagram of the mapping of the user equipment of combined dispatching,

Figure 12 is the schematic flow diagram of the method in conveyer node, and

Figure 13 is the block diagram of conveyer node.

Specific implementation mode

Fig. 2 shows the basic communication systems with reference signal, wherein system includes conveyer node 10 and receiver section Point 12.Even if shown example can be by radio base station if being directed to down link demodulation reference signal (DM-RS) conveyer node 10 Or user equipment indicates, and receiver node 12 can be indicated by user equipment or radio base station.Conveyer node 10 can wrap Include data block generator 14, wherein DM-RS pattern is inserted into data block or resource block.Resource block including DM-RS then leads to It crosses wireless channel and is transmitted to receiver node 12.In addition, predefining DM-RS between conveyer node 10 and receiver node 12 Pattern, that is, receiver node 12 knows DM-RS pattern in the signal.Therefore, in receiver node 12, by estimating in channel DM-RS targets, i.e., known DM-RS pattern is used first to apply channel estimation in gauge 16.This channel estimation is used subsequently to carry out phase Dry detection restores data so as to the demodulated received signal in channel demodulator 18, with reliable and appropriate ways.With regard to downlink Speech, conveyer node 10 can transmit signal by multiple transmitting antennas, and receiver node 12 can pass through multiple reception antennas Receive signal.Indicate that the channel matrix of channel status can be determined by the quantity of transmitting antenna and reception antenna.Line number, which is equal to, to be received The quantity of antenna, and columns is equal to the quantity of transmitting antenna.The transmission order of matrix is can be transmitted not by wireless channel The maximum quantity of congener information.Each information of the different types of information transmitted using multiple transmitting antennas may be defined as Transport layer.

Multiple code words are mapped to more than two transport layer by conveyer node 10, and according to the stent based on transmission order Each transport layer of more than two transport layer is mapped to the corresponding ports DM-RS by formula.10 precoding of conveyer node passes through corresponding The each code word and DM-RS pattern that transport layer carries, and the DM-RS pattern of precoding is transmitted to receiver in resource block Node.Receiver node 12 then can demodulate the data received based on DM-RS pattern.

Fig. 2 shows the schematic overviews of radio circuit.This solution is wirelessly electrically accessed based on Evolved Universal Terrestrial (E-UTRA) system is discussed, which is also commonly referred to as the long term evolution (LTE) of the WCDMA system of widespread deployment, but can It is realized in any radio circuit using OFDM and MIMO.

Even if shown example can be by radio base station or user equipment table if being directed to downlink RS conveyers node 10 Show, and receiver node 12 can be indicated by user equipment or radio base station.Embodiment herein relates generally to be used for example As the DM-RS of advanced 10th versions of LTE is designed.This solution is related to the relationship between transport layer and the ports DM-RS, and In transport layer to public or fixed mapped mode is provided between the ports DM-RS, to enabled effective mapping and so that connecing The data of transmission can be demodulated by receiving device node.

As described above, multiple code words are mapped to more than two transport layer by conveyer node.Fig. 3 is that code word is reflected to transport layer The schematic overview penetrated.The case where there are one transport layers for band 31, supplies single code word CW1 to precoding so as to through mutiple antennas Transmission.The case where there are two transport layers for band 32, two code word CW1 and CW2 of supply are passed to precoding through mutiple antennas It send.The case where there are three transport layers for band 33 directly supplies a code word CW1 to precoding.Second code word CW2 is through going here and there simultaneously (S/P) converter supplies are to precoding, and simultaneously (S/P) converter is divided into two signals, in situation 43, precoding to the string Encourage mutiple antennas.The case where there are four transport layers for band 34, code word CW1 and CW2 are supplied to each codeword division at two The corresponding S/P converters of a signal, and precoding is further supplied to be transmitted through mutiple antennas.For band, there are five transmission The case where layer 35, a code word CW1 is supplied to the first S/P converters for being divided into two signals, and is further supplied to Precoding.Second code word CW2 is supplied to the 2nd S/P converters for being divided into three signals, and is further supplied to and prelists Code.Precoding is supplied to mutiple antennas.The case where there are six transport layers for band 36, the first code word CW1, which is supplied to, divides it At the first S/P converters of three signals, and it is further supplied to precoding.Second code word CW2, which is supplied to, is divided into three 2nd S/P converters of a signal, and it is further supplied to precoding.Precoding is supplied to mutiple antennas.For carrying seven The case where transport layer 37, the first code word CW1 is supplied to the first S/P converters for being divided into three parts, and further supplies Precoding should be arrived.Second code word CW2 is supplied to the 2nd S/P converters for being divided into four parts, and is further supplied to Precoding.Precoding is supplied to mutiple antennas.The case where for carrying eight transport layers 38, two code words CW1 and CW2 are supplied to Signal is divided into four parts by corresponding S/P converters, each S/P converters, and further for being applied to precoding to encourage Mutiple antennas.

Transport layer and the ports DM-RS are strongly related to data transmission.There is disclosed herein mappings between them so that Receiver node knows how the data that demodulation receives.It is disclosed in Fig. 1 using Liang Ge CMD groups for transmitting order 1-4（That is 1- 4 transport layers）DM-RS pattern.However, embodiment herein also discloses transmission order 5-8 DM-RS patterns design with into one Step definition enables higher MIMO ranks in 8 ports DM-RS in total.To keep, based on effective extension of transmission order 1-4 patterns, providing Following pattern for transmitting order 5-8 as shown in Figure 4.In the time domain be 4 OCC length for each CDM groups with Form soft extension.The carrier wave of frequency is defined along y-axis, and defines symbol along x-axis.The shared resource unit for being assigned to RS of this pattern The identical positions RS, and Liang Ge CDM groups is kept not change, this can largely make UE realizations become light.It is logical It crosses and uses OCC on four continuous resource units (RE) in the time domain, for the DM-RS pattern of the 1st transport layer and for the 2nd The DM-RS pattern of transport layer is multiplexed by means of CDM.By the way that OCC is used on four continuous resource units in the time domain, It is multiplexed by means of CDM for the DM-RS pattern of the 3rd transport layer and the DM-RS pattern for the 4th transport layer.It is passed for the 1st Send the DM-RS pattern of layer and the 2nd transport layer and for the DM-RS pattern of the 3rd transport layer and the 4th transport layer by means of frequency division multiplexing (FDM) it is multiplexed.

In addition, DM-RS pattern shown in Fig. 4 will be used to transmit order 5-8 together with transmission order 1-4.Therefore, provided herein From transmission order 1 to the complete DM-RS pattern of transmission order 8.There is disclosed herein how transport layer to be distributed to for single user feelings The DM-RS pattern of condition and multi-user's situation, and embodiments herein relate to how to be distributed transport layer to the first CDM groups G1 With the 2nd CDM groups G2.

This solution uses code word.It should be noted that as shown in figure 3 above, each code word (CW) and up to 4 transmission Layer is associated, and for odd number transmission order mapping, and the transmission Layer assignment not waited will occur between two CW.Due to introducing DM-RS is used for data demodulation, therefore, it will thus provide the ports DM-RS of quantity identical as the transport layer of transmission.Therefore, in this solution The new mappings between transport layer and the ports DM-RS are provided in scheme.

Fig. 5 is the block diagram for describing Rel-10 embodiments 510, which exemplifies this solution.Rel-10 embodiments 510 Before executing precoding process 513, in addition to code word to transport layer mapping 511, transport layer is also executed to DM-RS mappings 512.

As described above, in the case of transmission at up to 2 layers, up to 2 CW will share a CDM group.By using Fig. 3 In be that transmit in order 1 and Fig. 3 in situation 32 be the mapping for transmitting order 2 and defining in situation 31, sharing a CDM group causes Extremely simple transport layer is mapped to DM-RS.However, being transmitted beyond 2 layers（That is ＞ transmits order 2）In the case of, two will be applied A CDM groups, and mutually FDM multiplexings, this keeps mapping somewhat complicated.Embodiment hereof is provided in two CW and DM-RS pattern Between relationship.In addition, the embodiment of this solution be suitable for single user (SU) situation and multi-user (MU) situation, and Transparent mapped provided herein for SU and MU.Therefore, embodiment hereof can cover both SU situations and MU situations to save Standard works and also reduces Operating Complexity.

This solution is suitable for SU-MIMO and MU-MIMO bis- in the case of being disclosed in the more transport layer transmission of downlink The transport layer of person is to public between DM-RS or fixed mapped mode.More specifically, the mapping mapped in referred to herein as CW is former Reason is in embodiment hereof for making two CW be mapped to different CDM groups to realize that exceeding transmission order 2 transmits.Therefore, it transmits Order 1-2 mappings are executable, reused as in Rel-9.When application is per transport layer channel estimation, this mapping principle can avoid It is interfered between code word, this is because code word is separated into two difference CDM groups, this can make h-arq (HARQ) Processing keeps independent.The principle mapped in CW is provided in figures 6 to 8.In addition, being mapped between disclosing referred to as CW in Fig. 9-11 another One fixes mapping.

Fig. 6 shows the mapped mode for being used to map transport layer to the ports DM-RS according to the first embodiment of this solution Schematic overview.Fig. 6 shows mapped mode in code word.DM-RS pattern for different CDM groups is labeled as 62.

For transmitting order 3：First CW, CW1 is mapped to transport layer 1.

Transport layer 1 is mapped to 1 G1 of CDM groups.Second code word CW2 is mapped to transport layer 2 and 3.Transport layer 2 and 3 is mapped to 2 G2 of CDM groups.

For transmitting order 4：CW1 is mapped to transport layer 1-2.Transport layer 1-2 is mapped to G1.CW2 is mapped to transport layer 3 and 4. Transport layer 3 and 4 is mapped to G2.

For transmitting order 5：CW1 is mapped to transport layer 1-2.Transport layer 1-2 is mapped to G1.CW2 is mapped to transport layer 3-5. Transport layer 3-5 is mapped to G2.

For transmitting order 6：CW1 is mapped to transport layer 1-3.Transport layer 1-3 is mapped to G1.CW2 is mapped to transport layer 4-6. Transport layer 3-6 is mapped to G2.

For transmitting order 7：CW1 is mapped to transport layer 1-3.Transport layer 1-3 is mapped to G1.CW2 is mapped to transport layer 4-7. Transport layer 3-7 is mapped to G2.

For transmitting order 8：CW1 is mapped to transport layer 1-4.Transport layer 1-4 is mapped to G1.CW2 is mapped to transport layer 5-8. Transport layer 5-8 is mapped to G2.

It can be had the following advantages according to the fixed mode of the mapping of some embodiments of this solution：

Fixation mapping principle for transmitting order 3-8 situations,

The fixation mapped mode of both SU-MIMO and MU-MIMO is covered,

Independent HARQ is kept as far as possible for each UE, and/or

It is suitable for both common CP and extension CP, the different mode with resource unit

Herein then by be SU-MIMO situations description, followed by the description of MU-MIMO situations.As described above, a CDM Group is associated with up to 4 ports DM-RS in so-called association mode.For the purpose of illustration, we are by DM-RS port definitions It is as follows：

● CDM groups 1：The ports DM-RS 1/2/5/6

● CDM groups 2：The ports DM-RS 3/4/7/8,

Alternatively

● CDM groups 1：The ports DM-RS 1/2/5/7

● CDM groups 2：The ports DM-RS 3/4/6/8

For SU-MIMO situations, a UE will occupy alone the resource block (RB) of distribution.Therefore, in the situation known to transmission order Under, this UE can be the transport layer that data transmission uses all supports.It is mapped and is schemed based on code word specified in figure 3 to transport layer Mapping principle in CW in 6 shows detailed transport layer to DM-RS port mappings in Fig. 7.Fig. 7 shows basis in Rel-9 Specified content and when only using a CDM group, can reuse the mapped mode of transmission order 1-2.According to this solution party The basic principle of the embodiment of case is the ports DM-RS that transport layer related with a code word is assigned in a CDM group. It is noted that each CDM groups include up to 4 ports DM-RS, these ports DM-RS occupy identical 12 OFDM resources Unit, and be multiplexed by orthogonal code covering.

Fig. 7 shows two input code words CW1 and CW2.The base for indicating downlink physical channel is generated by following steps Band signal.Input code word each of is transmitted on the physical channel by corresponding scrambling circuit by its bit scramble.Corresponding tune Device processed modulates scrambler bits, generates complex value modulation symbol.Channel-encoded bit derived from identical information bit block is commonly referred to as " code Word ".Code word is for example, by executing turbo（turbo）Coding, rate-matched, intertexture etc. handle the result of information bit. In more transmitting antenna systems, gained code word is then modulated and is distributed in transmitting antenna to transmit.

One code word CW1 or CW2 can be supplied to respectively is divided into the string of two signals simultaneously (S/P) turn respectively by CW1 and CW2 Parallel operation, and precoding is further carried out to be transmitted through mutiple antennas.Complex value modulation symbol for corresponding CW is mapped to transmission On layer.Single complex value modulation symbol of the pre-coding circuit precoding on each transport layer on antenna port to transmit.In advance Coding circuit inputs the vector block from transport layer mapper, and generation will be mapped in the resource on each antenna port Vector block.Corresponding channel resource mapper will be mapped to resource unit for the complex value modulation symbol of each antenna port.It is right The ofdm signal generative circuit answered generates complex-valued time domain orthogonal frequency division multiplexing (OFDM) signal for each antenna port.

Provide the extension mapped to transport layer mapping or abbreviation transport layer for the code word of transport layer 4-8.Extension needs With the 8th version backward compatibility of LTE, and the minimum influence that is brought to current LTE specification is especially introduced in terms of control signaling.

Fig. 7 shows the fixed mapping of the transmission order of the up to transmission order 8 according to the embodiment of this solution.Each transmission Order has fixed mapping scheme 711-718：

The case where there are one transport layers for band 71, single code word CW1 is mapped to the first transport layer L1.First transport layer then reflects It is mapped to the first ports the DM-RS P1 of the first CDM groups G1.First transport layer also maps to the 2nd DM- of the first CDM groups G1 The ports RS P2.Modulation symbol and DM-RS are supplied to precoding to be transmitted through one or more transmitting antennas.Modulation symbol is herein Alternatively referred to as physical down link sharing channel (PDSCH) symbol.

The case where there are two transport layers for band 72, a code word CW1 is mapped to the first transport layer L1 and the second transport layer L2.First transport layer L1 is then mapped to the first ports DM-RS P1, and the second transport layer L2 is mapped to the first CDM groups G1 The 2nd ports DM-RS P2.Modulation symbol and DM-RS are supplied to precoding to be transmitted through mutiple antennas.

The case where there are three transport layers for band 73, a code word CW1 is mapped to the first transport layer L1.First transport layer L1 It is then mapped to the first ports the DM-RS P1 of the first CDM groups G1.Second code word CW2 is mapped to the second transport layer L2 and third Transport layer L3.Second transport layer L2 is then mapped to the 3rd ports DM-RS P3, and third transport layer L3 is mapped to the 2nd CDM The 4th ports the DM-RS P4 of group G2.Modulation symbol and DM-RS are supplied to precoding to be transmitted through mutiple antennas.

The case where there are four transport layers for band 74, a code word CW1 is mapped to the first transport layer L1 and the second transport layer L2.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1, and the second transport layer is mapped to The 2nd ports the DM-RS P2 of first CDM groups G1.Second code word CW2 is mapped to third transport layer L3 and the 4th transport layer L4.The Three transport layer L3 are then mapped to the 3rd ports DM-RS P3, and the 4th transport layer L4 is mapped to the 4th of the 2nd CDM groups G2 The ports DM-RS P4.Modulation symbol and DM-RS are supplied to precoding to be transmitted through mutiple antennas.

The case where there are five transport layers for band 75, a code word CW1 is mapped to the first transport layer L1 and the second transport layer L2.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1, and the second transport layer is mapped to The 2nd ports the DM-RS P2 of first CDM groups G1.Second code word CW2 is mapped to third transport layer L3, the 4th transport layer L4 and Five transport layer L5.Third transport layer L3 is then mapped to the 3rd ports DM-RS P3, and the 4th transport layer L4 is mapped to the 4th DM-RS Port P4 and the 5th transport layer L5 is mapped to the 7th ports the DM-RS P7 of the 2nd CDM groups G2.Modulation symbol and DM-RS are supplied Precoding should be arrived to be transmitted through mutiple antennas.

The case where there are six transport layers for band 76, a code word CW1 is mapped to the first transport layer L1, the second transport layer L2 With third transport layer L3.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1, the second transmission The 2nd ports the DM-RS P2 and third transport layer L3 that layer L2 is mapped to the first CDM groups G1 are mapped to the first CDM groups G1 The 5th ports DM-RS P5.Second code word CW2 is mapped to the 4th transport layer L4, the 5th transport layer L5 and the 6th transport layer L6.The Four transport layer L4 are then mapped to the 3rd ports DM-RS P3, and the 5th transport layer L5 is mapped to the 4th ports DM-RS P4, Yi Ji Six transport layer L6 are mapped to the 7th port P7 of the 2nd CDM groups G2.Modulation symbol and DM-RS are supplied to precoding so as to through more A antenna transmission.

The case where for carrying seven transport layers 77, a code word CW1 are mapped to the first transport layer L1, the second transport layer L2 With third transport layer L3.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1, the second transmission The 2nd ports the DM-RS P2 and third transport layer L3 that layer L2 is mapped to the first CDM groups G1 are mapped to the first CDM groups G1 Fifth port P5.Second code word CW2 is mapped to the 4th transport layer L4, the 5th transport layer L5, the 6th transport layer L6 and the 7th and passes Send a layer L7.4th transport layer L4 is then mapped to the 3rd ports DM-RS P3, and the 5th transport layer L5 is mapped to the 4th ports DM-RS P4, the 6th transport layer L6 is mapped to the 7th port P7 and the 7th transport layer is mapped to the 8th DM-RS of the 2nd CDM groups G2 Port P8.Modulation symbol and DM-RS are supplied to precoding to be transmitted through mutiple antennas.

The case where for carrying eight transport layers 78, a code word CW1 are mapped to the first transport layer L1, the second transport layer L2, third transport layer L3 and the 8th transport layer L8.First transport layer L1 is then mapped to the first DM-RS of the first CDM groups G1 Port P1, the second transport layer L2 are mapped to the 2nd ports the DM-RS P2 of the first CDM groups G1, and third transport layer L3 is mapped to The fifth port P5 and the 8th transport layer L8 of one CDM groups G1 is mapped to the 6th ports the DM-RS P6 of the first CDM groups G1. Second code word CW2 is mapped to the 4th transport layer L4, the 5th transport layer L5, the 6th transport layer L6 and the 7th transport layer L7.4th passes A layer L4 is sent to be then mapped to the 3rd ports DM-RS P3, the 5th transport layer L5 is mapped to the 4th ports DM-RS P4, the 6th transport layer L6 is mapped to the 7th port P7 and the 7th transport layer is mapped to the 8th port P8 of the 2nd CDM groups G2.Modulation symbol and DM-RS is supplied to precoding to be transmitted through mutiple antennas.

Fig. 8 is shown as embodiment of the MU-MIMO situations using this solution of mapping scheme in code word, wherein passes through 3 The UE UE1-UE3 of a combined dispatching use transmission 6 mapped mode of order.UE1 is by being mapped to the ports DM-RS of 1 G1 of CDM groups A transport layer L1 transmission data #1.UE2 is by being mapped to the ports DM-RS and CDM groups 2 G2 of 1 G1 of CDM groups 2 transport layers L1, L2 of the ports DM-RS transmit data #1, #2.UE3 by be mapped to 1 G1 of CDM groups the ports DM-RS and 3 transport layer L1, L2, L3 transmission data #1, #2, #3 of two ports DM-RS of 2 G2 of CDM groups.Cause by keeping code Word separates in different CDM groups and reduces code word interference.

Fig. 9 shows the mapped mode for being used to map transport layer to the ports DM-RS according to some embodiments of this solution Schematic overview.Fig. 9 shows mapped mode between the code word opposite with embodiment in the Fig. 6-8 for showing to map in code word.For not DM-RS pattern with CDM groups is labeled as 92.Mapping is intended to that each CW is made to be mapped to as far as possible in Liang Ge CDM groups between code word. Following DM-RS port numberings are to be transmitted interlayer mapping.The method has very clear between transport layer and the ports DM-RS Mapping.

For transmitting order 3：Transport layer 1 and 2 is mapped to the ports DM-RS of 1 G1 of CW1 and CW2 and CDM groups.Transport layer 3 It is mapped to the ports DM-RS of 2 G2 of the second code word CW2 and CDM groups.

For transmitting order 4：Transport layer 1-2 is mapped to the ports DM-RS of 1 G1 of CW1 and CW2 and CDM groups.3 He of transport layer 4 are mapped to the ports DM-RS of 2 G2 of CW1 and CW2 and CDM groups.

For transmitting order 5：Transport layer 1-3 is mapped to the ports DM-RS of 1 G1 of CW1 and CW2 and CDM groups.Transport layer 4-5 It is mapped to the ports DM-RS of 2 G2 of code word CW1 and CW2 and CDM groups.

For transmitting order 6：Transport layer 1-3 is mapped to the ports DM-RS of 1 G1 of CW1 and CW2 and CDM groups.Transport layer 4-6 It is mapped to the ports DM-RS of 2 G2 of CW1 and CW2 and CDM groups.

For transmitting order 7：Transport layer 1-4 is mapped to the ports DM-RS of 1 G1 of CW1 and CW2 and CDM groups.Transport layer 5-7 It is mapped to the ports DM-RS of 2 G2 of CW1 and CW2 and CDM groups.

For transmitting order 8：Transport layer 1-4 is mapped to the ports DM-RS of 1 G1 of CW1 and CW2 and CDM groups.Transport layer 5-8 It is mapped to the ports DM-RS of 2 G2 of CW1 and CW2 and CDM groups.

Figure 10 shows the fixed mapping to the principle mapped between transport layer mapping and CW based on the code word specified in Fig. 3.Figure Show detailed transport layer to DM-RS port mappings in 10, wherein as described in the also mapping in CW above, for transmitting order The transport layer mapping of 1-2 SU/MU-MIMO can be reused in Rel-9 specified content, and only use one CDM groups Group, and the transport layer mapping for being used to transmit order 3-8 SU-MIMO is to assign transport layer related with a code word to two as far as possible A CDM groups.Advantage is simply to follow DM-RS port numberings.Herein in addition, as described above, the ports DM-RS of CDM groups It is the ports DM-RS alternatively distributed, that is, 2 ports-DM-RS 3/ of 1 ports-DM-RS 1/2/5/7 of CDM groups and CDM groups 4/6/8。

Figure 10 shows the fixed mapping of the up to transmission order of transmission order 8.Each transmission order has fixed mapping scheme 1011- 1018：

The case where there are one transport layers for band 101, single code word CW1 is mapped to the first transport layer L1.First transport layer is subsequent It is mapped to the first ports the DM-RS P1 of the first CDM groups G1.First transport layer also maps to the second of the first CDM groups G1 The ports DM-RS P2.Modulation symbol and DM-RS are supplied to precoding to be transmitted through one or more transmitting antennas.

The case where there are two transport layers for band 102, a code word CW1 is mapped to the first transport layer L1, and a CW2 It is mapped to the second transport layer L2.First transport layer L1 is then mapped to the first ports DM-RS P1, and the second transport layer L2 mappings To the 2nd ports the DM-RS P2 of the first CDM groups G1.Modulation symbol and DM-RS are supplied to precoding to be passed through mutiple antennas It send.

The case where there are three transport layers for band 103, a code word CW1 is mapped to the first transport layer L1.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1.Modulation symbol and DM-RS are supplied to precoding to pass through Mutiple antennas transmits.Second code word CW2 is mapped to the second transport layer L2 and third transport layer L3.Second transport layer L2 then maps To the 2nd ports DM-RS P2, and third transport layer L3 is mapped to the 3rd ports the DM-RS P3 of the 2nd CDM groups G2.Modulation symbol Number and DM-RS pattern be supplied to precoding to be transmitted through mutiple antennas.

The case where there are four transport layers for band 104, a code word CW1 is mapped to the first transport layer L1 and the second transport layer L2.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1, and the second transport layer is mapped to The 2nd ports the DM-RS P2 of first CDM groups G1.Second code word CW2 is mapped to third transport layer L3 and the 4th transport layer L4.The Three transport layer L3 are then mapped to the 3rd ports DM-RS P3, and the 4th transport layer L4 is mapped to the 4th of the 2nd CDM groups G2 The ports DM-RS P4.Modulation symbol and DM-RS pattern are supplied to precoding to be transmitted through mutiple antennas.

The case where there are five transport layers for band 105, a code word CW1 is mapped to the first transport layer L1 and the second transport layer L2.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1, and the second transport layer is mapped to The 2nd ports the DM-RS P2 of first CDM groups G1.Second code word CW2 is mapped to third transport layer L3, the 4th transport layer L4 and Five transport layer L5.Third transport layer L3 is then mapped to the 3rd ports DM-RS P3, and the 4th transport layer L4 is mapped to second The 4th ports the DM-RS P4 of CDM groups G2.5th transport layer L5 is mapped to the 5th ports the DM-RS P7 of the first CDM groups G1. Modulation symbol and DM-RS pattern are supplied to precoding to be transmitted through mutiple antennas.

The case where there are six transport layers for band 106, a code word CW1 is mapped to the first transport layer L1, the second transport layer L2 and third transport layer L3.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1, and second passes The 2nd ports DM-RS P2 and third transport layer L3 that layer L2 is mapped to the first CDM groups G1 is sent to be mapped to the 2nd CDM groups The 3rd ports DM-RS of G2.Second code word CW2 is mapped to the 4th transport layer L4, the 5th transport layer L5 and the 6th transport layer L6.The Four transport layer L4 are then mapped to the 4th ports the DM-RS P4 of the 2nd CDM groups G2, and the 5th transport layer L5 is mapped to first The 5th ports the DM-RS P5 of DM-RS groups G1.6th transport layer L6 is mapped to the 6th port P6 of the 2nd CDM groups G2.Modulation Symbol and DM-RS pattern are supplied to precoding to be transmitted through mutiple antennas.

The case where for carrying seven transport layers 107, a code word CW1 are mapped to the first transport layer L1, the second transport layer L2 and third transport layer L3.First transport layer L1 is then mapped to the first ports the DM-RS P1 of the first CDM groups G1, and second passes The 2nd ports DM-RS P2 and third transport layer L3 that layer L2 is mapped to the first CDM groups G1 is sent to be mapped to the 2nd CDM groups The third port P3 of G2.Second code word CW2 is mapped to the 4th transport layer L4, the 5th transport layer L5, the 6th transport layer L6 and the 7th Transport layer L7.4th transport layer L4 is then mapped to the 4th ports the DM-RS P4 of the 2nd CDM groups G2, and the 5th transport layer L5 reflects The 5th ports the DM-RS P5 and the 6th transport layer L6 for being mapped to the first CDM groups G1 are mapped to the 6th of the 2nd CDM groups G2 Port P6.7th transport layer L7 is mapped to the 7th port P7 of the first CDM groups G1.Modulation symbol and DM-RS pattern are supplied to Precoding through mutiple antennas to transmit.

The case where for carrying eight transport layers 108, a code word CW1 are mapped to the first transport layer L1, the second transport layer L2, third transport layer L3 and the 4th transport layer.First transport layer L1 is then mapped to the first ends DM-RS of the first CDM groups G1 Mouth P1, and the second transport layer L2 is mapped to the 2nd ports the DM-RS P2 of the first CDM groups G1.Third transport layer L3 is mapped to The third port P3 of 2nd CDM groups G2, and the 4th transport layer L4 is mapped to the 4th port P4 of the 2nd CDM groups G2.The Two code word CW2 are mapped to the 5th transport layer L5, the 6th transport layer L6, the 7th transport layer L7 and the 8th transport layer L8.5th transmission Layer L5 is then mapped to the 5th ports the DM-RS P5 of the first CDM groups G1, and the 6th transport layer L6 is mapped to the 2nd CDM groups G2 The 6th ports DM-RS P6 and the 7th transport layer L7 be mapped to the 7th port P7 of the first CDM groups G1.7th transport layer It is mapped to the 8th port P8 of the 2nd CDM groups G2.Modulation symbol and DM-RS pattern are supplied to precoding so as to through mutiple antennas Transmission.

Figure 11 shows the example that description mapping scheme works for MU-MIMO what states, wherein passes through each difference UE for 3 combined dispatchings of 1 transport layer, 2 transport layers and 3 transport layers uses transmission 6 mapping scheme of order.Therefore, it adjusts Spend the transport layer 1 L1 transmission data #1 that the first user equipment (UE) 1 is the ports DM-RS for being mapped to the first CDM groups G1.Scheduling Second user equipment UE 2 is 2 transport layer L1, L2 transmission data #1, #2 of the ports DM-RS for being mapped to the first CDM groups G1. Scheduling third user equipment (UE) 3 is the ports DM-RS of the ports DM-RS and the 2nd CDM groups G2 that are mapped to the first CDM groups G1 Three transport layer L1, L2, L3 transmission data #1, #2, #3.DM-RS pattern follows the transmission order 3 for being mapped between code word.

It should be understood that in addition can perform control signaling for MU-MIMO situations which DM-RS indicated to each UE Port assignment is to which transport layer.This can ensure that UE executes channel estimation using DM-RS appropriate.

For MU-MIMO situations, several UE will share identical resource block simultaneously.Therefore, known to transmission order pattern In the case of, each UE will use only the part of the transport layer of transmission.It is strongly desired to proceed to the simple, natural of SU-MIMO situations Extension.Embodiment proposes following two step process for MU-MIMO situations

Step 1：According to mapping distributes each UE between mapping principle or CW in CW

Step 2：Step 1 is repeated for the UE of other combined dispatchings.

Embodiment hereof can reuse SU-MIMO mapping schemes on multi-subscriber dispatching, can make in Fig. 7 or 10 The transport layer of proposal is transparent for SU-MIMO and MU-MIMO to DM-RS port mappings scheme.This also meet SU-MIMO with The principle of switching at runtime between MU-MIMO.This solution is disclosed for transmitting order 1-2 SU/MU-MIMO and transmission order 3-8 The fixation transport layer of both SU-MIMO maps, wherein is not necessarily to any additional control signaling.

Now with reference to flow chart depicted in figure 12, describe to be known as in the conveyer node of conveyer 10 in figure, Method and step for demodulated reference signal to be transmitted to according to some general embodiments in resource block receiver node 12.Step Suddenly it need not carry out, but can carry out in any suitable order in the following sequence.Conveyer node 10 is in multiple transmitting antennas It is upper to use more than two transport layer.Conveyer node 10 and receiver node 12 are included in radio circuit.Therefore, Figure 12 shows to map and be sent to mapping by signal the conveyer node 10 of receiver node 12 according to this solution.

As indicated by the dashed lines, this is optional step to step 120..In some embodiments, conveyer node 10 is controllable Instruction which or which the demodulated reference signal port assignment of receiver node 12 is made to the signal of receiver node 12.

Multiple code words are mapped to more than two transport layer by step 121. conveyer node 10.For example, according to that can be based on passing Send order fixed algorithm, the first code word and the second code word are mapped to different transport layers.

Step 123. conveyer node 10 is according to the fixed mode based on transmission order by each biography of more than two transport layer Layer is sent to be mapped to corresponding demodulated reference signal port.

Demodulated reference signal mode is added to resource block in each demodulated reference signal port.Demodulated reference signal port according to Association mode is associated with Liang Ge code division multiplexings group.The transport layer of each code division multiplexing group carries out code division multiplexing, and different The transport layer of code division multiplexing group carries out frequency division multiplexing.Therefore, transport layer carries out CDM and FDM multiplexings in resource block.

Each code division multiplexing group that association mode can define Liang Ge code division multiplexings group includes up to four demodulation references Demodulated reference signal is added to resource block in signal port, each demodulated reference signal port according to demodulated reference signal mode.Two The demodulated reference signal mode of each code division multiplexing group of a code division multiplexing group occupies identical orthogonal frequency division multiplexing resource Unit, and the transport layer of each code division multiplexing group of Liang Ge code division multiplexings group is answered by orthogonal code covering (OCC) With.Therefore, OCC separates the information transmitted by different transport layers.

In some embodiments, it is multiple to be mapped to the same code point for the definable transport layer for being mapped to some code word of fixed mode With the demodulated reference signal port in group, the interior mapping of so-called code word.Alternatively, fixed mode can define and be mapped to some code The transport layer of word is mapped to the demodulated reference signal port in different code division multiplexing groups, is mapped between so-called code word.

Fixed mode is applicable to transmission order 2-8.

The each code word and demodulated reference signal that 10 precoding of step 125. conveyer node is carried by corresponding transport layer Pattern.For example, conveyer node carrys out the resource block that precoding carries code word and DM-RS pattern with the following methods：So that for not Different DM-RS patterns and code word with transport layer can be transmitted by one or more transmitting antennas.

Precoder is weighting matrix.Data symbol and DM-RS are by shared precoder, therefore, comparable channel information It can be estimated by being based on DM-RS pattern and identifying transport layer.

Basic principle involved in precoding is mixing and the distributed modulation symbol on antenna, while will may also currently be believed Road condition is taken into account.Precoding can be for example chosen so as to by the way that the information for carrying the symbolic vector comprising modulation symbol to be multiplied by The matrixes of match channels is realized.Therefore the sequence of symbolic vector forms the collection of parallel symbol stream, and each such symbol stream Commonly referred to as " transport layer ".Therefore, depending on the selection of precoder in special realization, transport layer can correspond directly to certain A antenna or transport layer can be mapped through precoder to be distributed on also referred to as several antennas of antenna port.

The demodulated reference signal mode of precoding is transmitted to receiver by step 127. conveyer node 10 in resource block Node 12.After precoding, output is the data and DM-RS pattern of precoding.DM-RS pattern is relatively independent of precoding.

It should be noted that resource block can be assigned in a manner of multi-user's multiple-input and multiple-output multiple receiver nodes and/ Or a receiver node is assigned in a manner of single user multiple-input and multiple-output.

Demodulated reference signal mode can be used for physical down link sharing channel demodulation.

In some embodiments, the first code division multiplexing group associations of Liang Ge code division multiplexings group are to demodulated reference signal end Slogan 1,2,5 and 6 or 1,2,5 and 7.The second code of Liang Ge code division multiplexings group point multiplexing group and demodulated reference signal port 3, 4, it 7 is associated with 8 with 8 or 3,4,6.This can be defined in fixable association mode.

To execute the above method, conveyer node 10 is provided.Conveyer node 10 can be set by radio base station or user It is standby to indicate.Depending on for example using radio access technologies and term depending on, radio base station can be described as such as NodeB, evolution section Point B（ENB or eNode B）, base transceiver station（base transceiver station）, access point base station, base station routing Device or any other network element that can be communicated with the user equipment in respective cell.

User equipment can by such as wireless communication terminal, mobile cellular telephone, personal digital assistant (PDA), wireless platform, Laptop computer, computer can be indicated wirelessly with any other kind of devices of radio base station communication.

Figure 13 shows to be indicated by radio base station and includes mapping/processing circuit such as processor, according in LTE Transport layer executes the conveyer node 10 of mapping to the mapped mode between the ports DM-RS in Rel-10, wherein the ports DM-RS Data demodulation will be essentially available for support multiple LTE advanced features.Conveyer node 10 is mapped to by transmitting circuit transmission Receiver node.Therefore, the modulation symbol of the first code word and the second code word is mapped to three of receiver node 12 to be transmitted to Or more transport layer.More than two transport layer is mapped to two codes point by conveyer node 10 also based on the transmission order of channel It is multiplexed the demodulated reference signal port in group.Demodulated reference signal port is associated with the two code division multiplexings according to association mode Group.As a result, unique reference signal is assigned using the transmission of code word on each transport layer.By to each code division multiplexing group The transport layer that the mapping of the demodulated reference signal port of group generates mutually carries out code division multiplexing and frequency division multiplexing.Conveyer node 10 The code word and DM-RS pattern that subsequent precoding is carried by transport layer, and pass through the number of multiple transmitting antennas transmission precoding According to.Conveyer node 10 and receiver node 12 are arranged to be included in radio circuit.

Conveyer node 10 includes being configured to for multiple code words to be mapped to the mapping circuit 1301 of more than two transport layer.

Conveyer node 10 also includes being configured to fixed mode of the basis based on transmission order by the every of more than two transport layer A transport layer is mapped to the additional mappings circuit 1302 of corresponding demodulated reference signal port.Each demodulated reference signal port arrangements At addition demodulated reference signal mode to resource block.Demodulated reference signal port is associated with two code division multiplexings according to association mode Group.The transport layer of each code division multiplexing group carries out code division multiplexing, and the transport layer of different code division multiplexings group is into line frequency Divide multiplexing.

In addition, conveyer node 10 includes being arranged to each code word and demodulate ginseng that precoding is carried by corresponding transport layer Examine the pre-coding circuit 1303 of signal mode.Conveyer node 10 also includes transmitting circuit 1304, and transmitting circuit 1304 includes more It a transmitting antenna and is configured to that the demodulated reference signal mode of precoding is transmitted to receiver node 12 in resource block.

In addition, transmitting circuit 1304 may be disposed to control to the signal of receiver node 12 to be indicated to receiver node 12 Which or which demodulated reference signal port assignment is to each receiver node.

Present mechanism for demodulated reference signal mode to be transmitted to receiver node in resource block can be by such as scheming The one or more processors such as the processing circuit 1305 in 13 in discribed conveyer node 10 are together with for executing this solution The computer program code of the function of scheme is realized.Above mentioned program code can also be provided as computer program product, example Such as, to carry the data of the computer program code when being loaded into conveyer node 10 for executing inventive solution The form of carrier.One examples of such carriers can be in the form of CD optical ROMs.However, being carried by other data such as memory stick Body is feasible.In addition, computer program code can be provided as pure program code on the server, and download to conveyer section Point 10.

Therefore, Figure 13 shows to include mapping/processing circuit such as processor, according in LTE Rel-10 transport layer arrive Mapped mode between the ports DM-RS executes the conveyer node 10 of mapping, wherein the ports DM-RS will be essentially available for data Demodulation is to support multiple LTE advanced features.Conveyer is mapped to receiver by transmitting circuit transmission.

Disclosed herein controlled without L1 in transport layer to offer fixation or public mapped mode between the ports DM-RS The solution of signaling.It discloses the ports DM-RS and is essentially available for data demodulation to support to use such as CoMP and spatial reuse The embodiment of multiple LTE advanced features of equal MIMO functions.More specifically, here by being mapped between mapping or CW in CW, make With the mapped mode for following mapping principle, being mapped between the interior mappings of CW and CW means respectively beyond transmission 2 SU-MIMO of order So that two CW is mapped in different CDM groups in the case of transmission or so that each CW is mapped to Liang Ge CDM groups with balance mode In.Transmission order 1-2 SU/MU-MIMO mappings can be reused as in Rel-9.

The embodiment of mapped mode used herein can has the following advantages：

Fixation mapping principle for transmitting order 3-8 situations,

The fixation mapped mode of both SU-MIMO and MU-MIMO is covered,

The applicable pattern for both common CP and extension CP, and/or

The applicable transport layer mapping for retransferring.

In addition, in some embodiments mapped in using CW, due to by keeping code word to separate in different CDM groups And code word interference is reduced, therefore, independent HARQ is kept for each UE as far as possible.Using some embodiments mapped between CW In, realize simplified mapping scheme.

In the accompanying drawings and the description, it has been disclosed that example embodiment of the invention.However, not departing from the present invention substantially Principle in the case of, many change and modification can be carried out to these embodiments.Correspondingly, although using specific term, But they are only used with general and descriptive meaning, is not intended to limit, the scope of the present invention is wanted by accompanying right Book is asked to define.

Claims (13)

1. one kind is in conveyer node (10) for using more than two transport layer in resource block in multiple transmitting antennas The method that demodulated reference signal mode is transmitted to receiver node (12), the conveyer node (10) and receiver node (12) it is included in radio circuit, the method includes：

By multiple code wordsMapping(121) the more than two transport layer is arrived,

According to the fixed mode based on transmission order, by each transport layer of the more than two transport layerMapping(123) phase is arrived Demodulated reference signal port is answered,

- Precoding(125) each code word and demodulated reference signal mode carried by corresponding transport layer, and

By the demodulated reference signal mode of institute's precoding in the resource blockTransmission(127) receiver node is arrived (12)。

2. according to the method described in claim 1, demodulated reference signal mould is added in wherein each demodulated reference signal port Formula is to the resource block, and the demodulated reference signal port is associated with Liang Ge code division multiplexings group according to association mode, wherein often The transport layer of a code division multiplexing group carries out code division multiplexing, and the transport layer of different code division multiplexings group carries out frequency division and answers With.

3. method according to claim 1 or 2, wherein the association mode defines the every of described two code division multiplexing groups A code division multiplexing group includes up to four demodulated reference signal ports, and each demodulated reference signal port is joined according to the demodulation It examines signal mode and adds demodulated reference signal to the resource block and each code division multiplexing of described two code division multiplexing groups The demodulated reference signal mode of group occupies identical orthogonal frequency division multiplexing resource unit, and described two code division multiplexings The transport layer of each code division multiplexing group of group is multiplexed by orthogonal code covering.

4. according to claim 1-3 any one of them methods, wherein the fixed mode defines the biography for being mapped to some code word It send layer to be mapped to the demodulated reference signal port in the same code division multiplexing group, is mapped in so-called code word.

5. according to claim 1-3 any one of them methods, wherein the fixed mode defines the biography for being mapped to some code word It send layer to be mapped to the demodulated reference signal port in different code division multiplexing groups, is mapped between so-called code word.

6. according to claim 1-5 any one of them methods, wherein the resource block is in a manner of multi-user's multiple-input and multiple-output It is assigned to multiple receiver nodes.

7. according to the method described in claim 6, further include control signaling (120) with to the receiver node (12) instruction which A demodulated reference signal port assignment is to each receiver node.

8. according to claim 1-7 any one of them methods, wherein the resource block is in a manner of single user multiple-input and multiple-output It is assigned to receiver node.

9. according to claim 1-8 any one of them methods, wherein the fixed mode is suitable for transmission order 2-8.

10. according to claim 1-9 any one of them methods, wherein the demodulated reference signal mode is used for physical down chain Share channel demodulation in road.

11. according to claim 1-10 any one of them methods, wherein the first yard point of described two code division multiplexing groups is multiple With group associations to demodulated reference signal port numbers 1,2,5 and 6 or 1,2,5 and 7；And second code point multiplexing group is joined with demodulation It is associated to examine signal port 3,4,7 and 8 or 3,4,6 and 8.

12. one kind in multiple transmitting antennas in radio circuit for using more than two transport layer in resource block Demodulated reference signal mode is transmitted to the conveyer node (10) of receiver node (12), including：

Mapping circuit (1301) is configured to multiple code words being mapped to the more than two transport layer,

Additional mappings circuit (1302) is configured to according to the fixed mode based on transmission order, by the more than two transport layer Each transport layer is mapped to corresponding demodulated reference signal port, wherein each demodulated reference signal port arrangements are solved at addition Adjust reference signal mode to the resource block, and the demodulated reference signal port is associated with two codes point according to association mode It is multiplexed group, wherein the transport layer of each described two code division multiplexing groups carries out code division multiplexing, and different code division multiplexing groups The transport layer of group carries out frequency division multiplexing,

Pre-coding circuit (1303) is configured to each code word and demodulated reference signal mould that precoding is carried by corresponding transport layer Formula, and

Transmitting circuit (1304), including the multiple transmitting antenna and be configured to the solution of institute's precoding in the resource block Reference signal mode is adjusted to be transmitted to the receiver node (12).

13. one kind is in conveyer node (10) for using more than two transport layer in resource block in multiple transmitting antennas The method that demodulated reference signal mode is transmitted to receiver node (12), the conveyer node (10) and receiver node (12) it is included in radio circuit, the method includes：

By multiple code wordsMapping(121) the more than two transport layer is arrived,

According to the fixed mode based on transmission order, by each transport layer of the more than two transport layerMapping(123) phase is arrived Answer demodulated reference signal port, wherein add demodulated reference signal mode to the money in each demodulated reference signal port Source block, the demodulated reference signal port is associated with Liang Ge code division multiplexings group according to association mode, wherein each code division multiplexing The transport layer of group carries out code division multiplexing, and the transport layer of different code division multiplexings group carries out frequency division multiplexing,

- Precoding(125) each code word and demodulated reference signal mode carried by corresponding transport layer, and

By the demodulated reference signal mode of institute's precoding in the resource blockTransmission(127) receiver node is arrived (12),

Wherein, described each for addition demodulated reference signal mode to each of the resource block demodulated reference signal port Demodulated reference signal port is associated according to one of association mode code division multiplexing different from two group, wherein multiple with each code point Carry out code division multiplexing with the demodulated reference signal of group associations, and from the demodulated reference signal of different code division multiplexing group associations Carry out frequency division multiplexing.