CN106233816A

CN106233816A - The transmission method of demodulated reference signal and equipment

Info

Publication number: CN106233816A
Application number: CN201480078346.1A
Authority: CN
Inventors: 黎超
Original assignee: Huawei Technologies Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2014-05-21
Filing date: 2014-05-21
Publication date: 2016-12-14
Anticipated expiration: 2034-05-21
Also published as: WO2015176255A1; CN106233816B

Abstract

The present invention provides transmission method and the equipment of a kind of demodulated reference signal, the position sending demodulated reference signal in Physical Resource Block is determined including: the first equipment, the position of described transmission demodulated reference signal includes the mapping position of that described first equipment has used and/or untapped channel state information reference signals CSI RS, and described demodulated reference signal is for demodulating the data of described second subscriber equipment；Described first equipment sends configuration information to described second subscriber equipment, and described configuration information is for indicating described demodulated reference signal position in described Physical Resource Block；Described first equipment sends the position of demodulated reference signal described in described Physical Resource Block and sends described demodulated reference signal.The technical scheme using the embodiment of the present invention to provide, can support that the down user data of more users demodulates.

Description

The transmission method of demodulated reference signal and equipment

The transmission method and equipment technical field of demodulated reference signal

The present invention relates to the transmission method and equipment of the communication technology, more particularly to a kind of demodulated reference signal.Background technology

MIMO technique（Multiple-Input Multiple-Out-put, abbreviation MIMO) and OFDM（Orthogonal Frequency Division Multiplexing, abbreviation OFDM) system combination, the transmittability of wireless communication system refer to a new high.With Long Term Evolution（Long Term Evolution, abbreviation LTE) the 10th edition agreement（Release- 10, abbreviation Rel-10) for the 4th generation cell mobile communication systems of representative, the MIMO with regard to supporting most 8 transmitting antennas in base station.Single user multiple-input and multiple-output（Single User- Multiple-Input Multiple-Out-put, abbreviation SU-MIMO) transmittability be limited to the antenna amount and isolation between antennas of unique user, therefore SU-MIMO compare main flow at present be as mobile phone compared with 2 cross-polarized antennas can be accomplished on skinny device.The SU-MIMO of i.e. current main flow can be supported to 2 streams.Jin mono- Walk, to improve the transmittability of cell, multi-user's multiple-input and multiple-output（Multi-User- Multiple-Input Multiple-Out-put, abbreviation MU-MIMO) gain that the separation by user spatially between multi-user is brought can be provided Jin mono- Walk.

Existing LTE system version Rel-10 could support up the demodulated reference signal of 8 streams, therefore for the multiple-input and multiple-output scene of multi-user, it is impossible to support the down user data of more users number to demodulate.The content of the invention present invention provides the transmission method and equipment of a kind of demodulated reference signal, and the down user data of more users number can not be supported to demodulate problem to solve existing LTE system versions Rel-10.

The first aspect of the present invention there is provided a kind of transmission method of demodulated reference signal, including：First equipment determines the position of the transmission demodulated reference signal in Physical Resource Block, and the position of the transmission demodulated reference signal includes channel condition information that first equipment has been used and/or untapped Reference signal CSI-RS mapping position, the demodulated reference signal is used for the data for demodulating the second user equipment；

First equipment is to the second user equipment send configuration information, and the configuration information is used to indicate position of the demodulated reference signal in the Physical Resource Block；

The position that first equipment sends demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal.

In the first possible implementation, according in a first aspect, the configuration information is the CSI-RS signalings of non-zero power.

In second of possible implementation, with reference to first aspect or the first possible implementation, first equipment determines to send the position of demodulated reference signal in Physical Resource Block, specifically includes：First equipment is according to the channel condition information of the second user equipment, it is determined that sending the position of demodulated reference signal in the Physical Resource Block.

In the third possible implementation, with reference to first aspect, the first possible implementation and second of possible implementation, first equipment is sent described in the Physical Resource Block before the position transmission demodulated reference signal of demodulated reference signal, in addition to：

First equipment sends precoding to the second user equipment and indicated, the precoding indicates the precoding information of the user data for indicating the second user equipment, so that the second user equipment carries out user data demodulation according to the demodulated reference signal and the precoding information, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or the first downlink demodulation reference signal DM-RS for performing user data demodulation, first DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to CSI-RS mapping mode.

In the 4th kind of possible implementation, with reference to first aspect, the first possible implementation and second of possible implementation, first equipment is sent described in the Physical Resource Block before the position transmission demodulated reference signal of demodulated reference signal, in addition to：

First equipment carries out precoding to the demodulated reference signal, the demodulated reference signal is particularly for the 2nd DM-RS for performing user data demodulation, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

In the 5th kind of possible implementation, with reference to first aspect, the first possible implementation, second possible implementation, the third possible implementation and the 4th kind of possible implementation, Before the position that first equipment sends demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal, in addition to：

First equipment sends the first configured information to the second user equipment, and first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block.

In the 6th kind of possible implementation, with reference to the 5th kind of possible implementation, if the Physical Resource Block includes sending DM-RS position at least one first user equipment, the position that first configured information is indicated includes the position that DM-RS is sent at least one described first user equipment.

In the 7th kind of possible implementation, with reference to first aspect, the first possible implementation, the first possible implementation, second possible implementation, the third possible implementation, the 4th kind of possible implementation, the 5th kind of possible implementation and the 6th kind of possible implementation, before the position that first equipment sends demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal, in addition to：

First equipment sets the second configured information of transmission at least one described first user, second configured information is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that the 3rd equipment sends demodulated reference signal according to the second user equipment carries out rate-matched or disturbed in the 8th kind of possible implementation, with reference to first aspect, with reference to first aspect, the first possible implementation, the first possible implementation, second of possible implementation, the third possible implementation, 4th kind of possible implementation, 5th kind of possible implementation, 6th kind of possible implementation and the 7th kind of possible implementation, after first equipment sends the position transmission demodulated reference signal of demodulated reference signal described in the Physical Resource Block, also include：

First equipment sends the 3rd indication signaling to base station, and the 3rd indication signaling is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that the second user equipment sends demodulated reference signal is reserved in the base station.

The second aspect of the present invention there is provided a kind of transmission method of demodulated reference signal, including：Second user equipment receives the configuration information that the first equipment is sent, and the configuration information is used to indicate position of the demodulated reference signal in the Physical Resource Block；

The demodulated reference signal that first equipment is sent is received on the position that second user equipment configuration information described in the Physical Resource Block is indicated, the position that the configuration information is indicated includes described CSI-RS that first equipment has been used and/or untapped mapping position, the demodulated reference signal is used for the data for demodulating the second user equipment.

In the first possible implementation, according to second aspect, before the demodulated reference signal that the first equipment transmission is received on the position that second user equipment configuration information described in the Physical Resource Block is indicated, in addition to：

The second user equipment receives the precoding instruction that first equipment is sent；

The second user equipment is indicated according to the precoding, obtains the precoding information of the user data of the second user equipment；

After the demodulated reference signal that the first equipment transmission is received on the position that second user equipment configuration information described in the Physical Resource Block is indicated, in addition to：

The second user equipment carries out user data demodulation according to the demodulated reference signal and the precoding information；

Wherein, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

In second of possible implementation, according to second aspect, the demodulated reference signal is the 2nd DM-RS that user data demodulation is performed by being used for after precoding, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

In the third possible implementation, with reference to second aspect, the first possible implementation and second of possible implementation, before the demodulated reference signal that the first equipment transmission is received on the position that second user equipment configuration information described in the Physical Resource Block is indicated, in addition to：The second user equipment receives the first configured information that first equipment is sent, and first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block；

Position in the Physical Resource Block that the second user equipment is indicated according to first configured information, carries out rate-matched or interferometry.

The third aspect of the present invention there is provided a kind of first equipment, including：

Determining module, the position for determining the transmission demodulated reference signal in Physical Resource Block, the hair Sending the position of demodulated reference signal includes channel state information reference signals CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment；

Sending module, for the second user equipment send configuration information, the configuration information to be used to indicate position of the demodulated reference signal in the Physical Resource Block；

The position that the sending module is additionally operable to send demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal.

In the first possible implementation, according to the third aspect, the determining module specifically for：According to the channel condition information of the second user equipment, it is determined that sending the position of demodulated reference signal in the Physical Resource Block.

In second of possible implementation, with reference to the third aspect or the first possible implementation, the sending module is additionally operable to：

Precoding is sent to the second user equipment to indicate, the precoding indicates the precoding information of the user data for indicating the second user equipment, so that the second user equipment carries out user data demodulation according to the demodulated reference signal and the precoding information, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or the first downlink demodulation reference signal DM-RS for performing user data demodulation, first DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to CSI-RS mapping mode.

In the third possible implementation, with reference to the third aspect or the first possible implementation, first equipment also includes：

Coding module, for carrying out precoding to the demodulated reference signal, the demodulated reference signal is particularly for the 2nd DM-RS for performing user data demodulation, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

In the 4th kind of possible implementation, with reference to the third aspect, the first possible implementation, second of possible implementation and the third possible implementation, the sending module is additionally operable to：The first configured information is sent to the second user equipment, first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block.

In the 5th kind of possible implementation, with reference to the third aspect, the first possible implementation, second possible implementation, the third possible implementation and the 4th kind of possible implementation, The sending module is additionally operable to：

The second configured information is sent at least one described first user equipment, second configured information is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that at least one described first user equipment sends demodulated reference signal according to the second user equipment carries out rate-matched or done in the 6th kind of possible implementation, with reference to the third aspect, the first possible implementation, second of possible implementation, the third possible implementation, 4th kind of possible implementation and the 5th kind of possible implementation, the sending module is additionally operable to：

The 3rd indication signaling is sent to base station, the 3rd indication signaling is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that the second user equipment sends demodulated reference signal is reserved in the base station.

The fourth aspect of the present invention there is provided a kind of second user equipment, including：

Receiving module, for receiving the configuration information that the first equipment is sent, the configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block；

Determining module, the configuration information for being received according to the receiving module determines position of the demodulated reference signal in the Physical Resource Block；

The receiving module is additionally operable to receive the demodulated reference signal that first equipment is sent on position in the Physical Resource Block in the demodulated reference signal that the determining module is determined, position of the demodulated reference signal that the determining module is determined in the Physical Resource Block includes CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment.

In the first possible implementation, according to fourth aspect, the receiving module is additionally operable to：Receive the precoding instruction that first equipment is sent；

Indicated according to the precoding, obtain the precoding information of the user data of the second user equipment；

The second user equipment also includes：

Demodulation module, for carrying out user data demodulation according to the demodulated reference signal and the precoding information；

Wherein, the demodulated reference signal include being used for the CSI-RS for performing channel measurement operation or the first downlink demodulation reference signal DM-RS for performing user data demodulation, the first DM-RS be according to CSI-RS mapping mode is mapped in the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal.

In second of possible implementation, with reference to fourth aspect or the first possible implementation, the receiving module is additionally operable to：

The first configured information that first equipment is sent is received, first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block；

Position in the Physical Resource Block indicated according to first configured information, carries out rate-matched or interferometry.

The fifth aspect of the present invention there is provided a kind of first equipment, including：

Processor, position for determining the transmission demodulated reference signal in Physical Resource Block, the position for sending demodulated reference signal includes channel state information reference signals CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment；

Transmitter, for the second user equipment send configuration information, the configuration information to be used to indicate position of the demodulated reference signal in the Physical Resource Block；

The position that the transmitter is additionally operable to send demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal.

In the first possible implementation, according to the 5th aspect, the processor specifically for：According to the channel condition information of the second user equipment, it is determined that sending the position of demodulated reference signal in the Physical Resource Block.

In second of possible implementation, with reference in the 5th aspect or the first possible implementation, the transmitter is additionally operable to：

In the third possible implementation, with reference in the 5th aspect or the first possible implementation, the processor is additionally operable to： Precoding is carried out to the demodulated reference signal, the demodulated reference signal is particularly for the 2nd DM-RS for performing user data demodulation, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

In the 4th kind of possible implementation, with reference to the 5th aspect, the first possible implementation, second of possible implementation and the third possible implementation, the transmitter is additionally operable to：

The first configured information is sent to the second user equipment, first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block.

In the 5th kind of possible implementation, with reference to the 5th aspect, the first possible implementation, second possible implementation, the third possible implementation and the 4th kind of possible implementation, the transmitter is additionally operable to：

The second configured information is sent at least one described first user equipment, second configured information is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that at least one described first user equipment sends demodulated reference signal according to the second user equipment carries out rate-matched or done in the 6th kind of possible implementation, with reference to the 5th aspect, the first possible implementation, second of possible implementation, the third possible implementation, 4th kind of possible implementation and the 5th kind of possible implementation, the transmitter is additionally operable to：

The sixth aspect of the present invention there is provided a kind of second user equipment, including：

Receiver, for receiving the configuration information that the first equipment is sent, the configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block；

Processor, the configuration information for being received according to the receiver determines position of the demodulated reference signal in the Physical Resource Block；

The receiver is additionally operable to receive the demodulated reference signal that first equipment is sent on position in the Physical Resource Block in the demodulated reference signal that the processor is determined, position of the demodulated reference signal that the processor is determined in the Physical Resource Block includes CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment. In the first possible implementation, according to the 6th aspect, the receiver is additionally operable to：Receive the precoding instruction that first equipment is sent；

The processor is additionally operable to carry out user data demodulation according to the demodulated reference signal and the precoding information；

In second of possible implementation, with reference to the 6th aspect or the first possible implementation, the receiver is additionally operable to：

The transmission method of the demodulated reference signal of the embodiment of the present invention, determined to send the position of demodulated reference signal in Physical Resource Block by the first equipment, and to second user equipment send configuration information to indicate position of the demodulated reference signal in above-mentioned Physical Resource Block.The position of the transmission demodulated reference signal includes channel state information reference signals CSI-RS that the first equipment has been used and/or untapped mapping position, therefore, because in above-mentioned Physical Resource Block CSI-RS mapping position of first equipment defined in existing LTE system version Rel-10 sends demodulated reference signal, it therefore, it can support the down user data demodulation of more users.The technical scheme of brief description of the drawings in order to illustrate the embodiments of the present invention more clearly, one will be done to the required accompanying drawing used in embodiment or description of the prior art below simply to introduce, apparently, drawings in the following description are some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is reference signal under LTE Rel-10 normal cyclic prefix in a Physical Resource Block pair Fig. 2 is a kind of flow chart of the transmission method for demodulated reference signal that the embodiment of the present invention one is provided；Fig. 3 is a kind of flow chart of the transmission method for demodulated reference signal that the embodiment of the present invention two is provided；Fig. 4 is the interaction diagrams of a kind of first equipment that the embodiment of the present invention three is provided and second user equipment；

Fig. 5 is resource maps of a kind of CSI-RS of 4 antenna port in a PRB pair under LTE Rel-10 normal cyclic prefix；

Resource maps of the CSI-RS of 2 antenna ports of two kinds of configurations in a PRB pair under the normal cyclic prefix that Fig. 6 is LTE Rel-10；

Fig. 7 is resource maps of a kind of CSI-RS of 8 antenna port in a PRB pair under LTE Rel-10 normal cyclic prefix；

Fig. 8 is a resource map when second user equipment and the first user equipment carry out the MU-MIM0 of space division multiplexing；

Fig. 9 is the interaction diagrams of a kind of first equipment that the embodiment of the present invention four is provided and second user equipment；

Figure 10 carries out the resource map during MU-MIM0 of space division multiplexing for two second user equipment under normal cyclic prefix in a PRB pair；

Figure 11 is resource map when the lower four second user equipment of normal cyclic prefix carries out the MU-MIMO of space division multiplexing in a PRB pair；

Figure 12 is rate-matched figure when the lower four second user equipment of normal cyclic prefix carries out the MU-MIMO of space division multiplexing in a PRB pair；

Figure 13 is the interaction diagrams of a kind of first equipment that the embodiment of the present invention five is provided and the first user equipment；

Figure 14 is a kind of structural representation for first equipment that the embodiment of the present invention six is provided；

Figure 15 is a kind of structural representation for first equipment that the present embodiment seven is provided；

Figure 16 is a kind of structural representation for second equipment that the present embodiment eight is provided；

Figure 17 is a kind of structural representation for second equipment that the present embodiment nine is provided；

Figure 18 is a kind of structural representation for first equipment that the present embodiment ten is provided；

Figure 19 is a kind of structural representation for second equipment that the present embodiment 11 is provided. Embodiment

To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

Fig. 1 is resource map of the reference signal in a Physical Resource Block pair under LTE Rel-10 normal cyclic prefix.In broadband system, particularly ofdm system, the division of resource block is from time domain and the progress of frequency domain both direction.With reference to LTE PHY in description to resource block, a Physical Resource Block（Physical Resource Block, abbreviation PRB) correspond to 180 KHzs and a time slot of time domain, i.e., 0.5 millisecond on frequency domain.In normal cyclic prefix（Normal cyclic prefix) under, one time slot can transmit continuous 7 OFDM symbols, one PRB represents in time domain continuous 12 subcarriers in continuous 7 OFDM symbols and frequency domain, therefore a PRB is made up of 7*12 resource element (Resource Element, abbreviation RE).One PRB pair is made up of two PRB, that is, takes 14*12 RE.As shown in Figure 1, PRB pair in figure is made up of the RE lattices of different patterns, along two group 0,1,2 of X-direction ..., 6 numberings, 7 OFDM symbols of first time slot and second time slot, 0,1 numbered along the y-axis direction are represented respectively, 2 ..., 11 represent continuous 12 subcarriers on frequency domain.

Specifically, in Fig. 1, a PRB pair can be by down control channel（Physical Downlink Control Channel, abbreviation PDCCH) and the common occupancy of DSCH Downlink Shared Channel (Physical Downlink Share Channel, abbreviation PDSCH).Wherein, PDCCH is used to transmit continuous 12 subcarriers, i.e., 3*12 RE in control information, preceding 3 OFDM symbols and frequency domain of first time slot of occupancy;PDSCH is used for transmitting user equipment（User Equipment, abbreviation UE) data, take a PRB pair in remaining RE, the present invention in demodulated reference signal be exactly in PDSCH transmission, the user data transmitted for demodulating on PDSCH.Emphasis describes the reference signal in a PRB pair below.Reference signal mainly includes public reference signal（Common Reference Signal, abbreviation CRS), channel state information reference signals（Channel State Information-Reference Signal, abbreviation CSI-RS) and downlink demodulation reference signal（Downlink Modulation-Reference Signal, abbreviation DM-RS), represented for transmitting resource occupation position of the CRS antenna port in a PRB pair with horizontal stripe RE, all CSI-RS available resources position is represented with crossbanding RE, all DM-RS available resources position represents that other RE are used to transmit public control with the positive 45 ° RE that tiltedly rule Signaling processed or user data.

Specifically, existing LTE Rel-10 are total up to all crossbanding RE in the possible mapping position that CSI-RS is configured with all CSI-RS on eight antenna ports, a PRB pair, i.e. Fig. 1,40 are had；All DM-RS available resources position is 24 RE, due to 12 RE in each DM-RS ports correspondence DM-RS available resources position, every orthogonal occupancy identical RE positions of four DM-RS, thus above-mentioned 24 RE correspond to 8 DM-RS antenna ports for being used to send DM-RS, therefore prior art could support up the data demodulation of 8 data flows.

Jin mono- Walk, CSI-RS transmission can be using 1,2,4 or 8 antenna port.Under every kind of antenna port number, CSI-RS has a variety of different position mapping modes.Table 1 is given under the different subframe structures of conventional cyclic prefix, the instruction of the CSI-RS of different antennae port number position mapping mode.Table 2 gives CSI-RS sub-frame configuration.Configuration quantity and position instruction CSI-RS position mapping mode in Physical Resource Block of the table 1 with CSI-RS on different antennae port, the CSI-RS of table 2 sub-frame configuration, the CSI-RS subframe sequence number for sending cycle and CSI-RS sub-frame offset amount instruction transmission CSI-RS.

Table 1

Table 2

Specifically, in table 1, the variable of mapping position with Γ for calculating CSI-RS on a PRB pair, it can be calculated and obtained by the sequence number of the OFDM symbol where a RE, Γ can be calculated by the sequence number of the subcarrier where a RE come, for currently transmitted CSI-RS time-gap number, its value is 0 or 1；Frame structure 1 refers to LTE time division duplex（Time Division Duplexing, abbreviation TDD) frame structure, frame structure 2 refers to LTE FDD（Frequency Division Duplexing, abbreviation FDD) frame structure；CSI-RS configuration numberings represent different CSI-RS position mapping mode, have 20 kinds of configurations during frame structure 1, there is 32 kinds of configurations during frame structure 2；CSI-RS antenna port configuration quantity represents transmission CSI-RS antenna port number, and its value can be 1,2,4 or 8.

Jin mono- Walk, table 2 give CSI-RS sub-frame configuration/_esi― _RS, CSI-RS transmission cycle r_esi__RSWith CSI-RS sub-frame offset A_csi__rs.Wherein, the unit for sending cycle ^ is 1 subframe, i.e., 1 millisecond.Specifically, the CSI-RS transmission cycle represents to send the interval between CSI-RS subframe numbers, the value of CSI-RS sub-frame offsets is determined by CSI-RS sub-frame configuration, for indicating that CSI-RS starting sends subframe sequence number.From table 2 it can be seen that on the premise of the CSI-RS transmission cycle determines, the number of the value of CSI-RS sub-frame configuration and CSI-RS sub-frame offset is identical.For example, if CSI-RS transmission period assignment is 5 milliseconds, CSI-RS sub-frame configuration and CSI-RS sub-frame offsets can be configured to any integer value in 0 ~ 4, if the value that CSI-RS sub-frame configuration is set into 0, CSI-RS sub-frame offsets is also 0, in this configuration, CSI-RS can be in subframe serial number 0, sent in 5,10 ... subframe, i.e., every 5 subframes are sent once；Similarly, if CSI-RS sub-frame configuration is set into 1, then it represents that, sent in the subframe that CSI-RS can be in subframe serial number 1,6,11 ...；Likewise, if CSI-RS transmission period assignment is 10 milliseconds, CSI-RS sub-frame configuration can be configured in 5 ~ 14 Any integer value, if CSI-RS sub-frame configuration is set into 5, then the value of CSI-RS sub-frame offsets is 0, in this configuration, CSI-RS can be in subframe serial number 0,10, sent in 20 subframe, i.e. every 10 subframes are sent once, and remaining configuration is similar, repeats no more here.

Geng Jin mono- Walk, as it can be seen from table 1 the CSI-RS that 1 antenna port and 2 antenna ports are sent can have the CSI-RS under 20 kinds or 32 kinds different position mapping modes, every kind of position mapping mode to take 2 RE on a PRB pair;The CSI-RS that 4 antenna ports are sent can have the CSI-RS under 10 kinds of different position mapping modes, every kind of position mapping mode to take 4 RE on a PRB pair;The CSI-RS that 8 antenna ports are sent can have the CSI-RS under 5 kinds of different position mapping modes, every kind of position mapping mode to take 8 RE on a PRB pair.In actual use, the time for sending CSI-RS and frequency location can be indicated according to table 1 and table 2.

In addition, in existing protocol, base station can configure the CSI-RS of the zero energy or CSI-RS of non-zero power for UE.Specifically, base station can issue the CSI-RS that the CSI-RS signalings of zero energy indicate zero energy for UE, so as to carry out interferometry in the mapping position for the CSI-RS that UE can be indicated in the CSI-RS signalings of the zero energy；Base station can also issue the CSI-RS that the CSI-RS signalings of non-zero power indicate non-zero power for UE, so as to carry out channel condition information in the mapping position for the CSI-RS that UE can be indicated in the CSI-RS signalings of the non-zero power（Channel State Information, abbreviation CSI) measurement.The structure of above two signaling is identical, is for indicating CSI-RS mapping position, is referred to as CSI-RS configuration informations.

It should be noted that the scheme of the embodiment of the present invention is all performed in units of PRB, and it is equally applicable to the mapping mode in units of PRB pair.For the relation being more clearly depicted in a PRB pair between other signals, the scheme of the clearer explanation embodiment of the present invention, the resource impact pattern in the subsequent embodiment of this specification is all based on the PRB pair in Fig. 1 to illustrate.Fig. 2 is a kind of flow chart of the transmission method for demodulated reference signal that the embodiment of the present invention one is provided.As shown in Fig. 2 the transmission method of the demodulated reference signal of the present embodiment, can include rapid with lower Walk to wrap：The rapid S100 of Walk, the first equipment determine to send the position of demodulated reference signal in Physical Resource Block, sending the position of demodulated reference signal includes CSI-RS that the first equipment has been used and/or untapped mapping position, and demodulated reference signal is used for the data for demodulating second user equipment.

The rapid S101 of Walk, the first equipment are to second user equipment send configuration information, and configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block. The position that the rapid S102 of Walk, the first equipment send demodulated reference signal in Physical Resource Block sends demodulated reference signal.

The executive agent rapid Ge Walk of the present embodiment Zhong is the first equipment, in practice, and first equipment both can be the network equipment, such as base station, via node or the UE with communication function between UE.When the first equipment is base station, accordingly, above-mentioned demodulated reference signal is that base station is sent to second user equipment, the demodulated reference signal that the data to second user equipment are demodulated, therefore can be called downlink demodulation reference signal；When the first equipment is user equipment（User Equipment, abbreviation UE) when, above-mentioned demodulated reference signal is still the data demodulation for second user equipment, but does not have point of uplink and downlink.

Because prior art is to realize that user data is demodulated with DM-RS, and its available DM-RS resource location is limited, as described in Figure 1, existing DM-RS can not support the data demodulation more than 8 data flows simultaneously, if one user of each data flow correspondence, that is, prior art at most supports 8 users simultaneously.

In the present embodiment, the first equipment can not send demodulated reference signal in DM-RS position, but with CSI-RS as shown in Figure 1 available resources position, as the position of demodulated reference signal is sent, so as to realize the data demodulation of more users.Specifically, the position of above-mentioned transmission demodulated reference signal include having used, it is untapped, use plus any of unused CSI-RS mapping position.

As a kind of feasible embodiment, the first equipment can determine to send demodulated reference signal in its CSI-RS used mapping position.That is, the first equipment can determine that the mapping position of the CSI-RS for sending the first user equipment with sends demodulated reference signal to second user equipment.It should be noted that, here the first user equipment, hereinafter referred to as the first UE, represent the corresponding UE of LTE legacy versions, second user equipment, hereinafter referred to as the 2nd UE, for the corresponding UE of LTE redactions, LTE legacy versions refer to the version of the LTE protocol before the application introducing, LTE redactions are the LTE versions for introducing the application, general, if the method for the present invention is introduced in Rel-n, version before then legacy version is LTE Rel-n, redaction refers to LTE Rel-n.Unless stated otherwise, following the 2nd UE, the first UE, LTE redaction and LTE legacy versions, continue to use definition herein.

As another feasible embodiment, the first equipment can determine to send demodulated reference signal in its untapped CSI-RS mapping position.That is, the first equipment can be subtracted with its all available CSI-RS mapping position is used for the mapping position for sending the first UE CSI-RS, it is then determined that sending demodulated reference signal with remaining CSI-RS mapping position.

As another feasible embodiment, the first equipment can also be using above two embodiment Combination come determine send demodulated reference signal position.That is, first equipment can both determine that the mapping position of the CSI-RS for sending the first UE with sends demodulated reference signal to the 2nd UE, it can be subtracted again with its all available CSI-RS mapping position and be used for the mapping position for sending the first UE CSI-RS, it is then determined that sending demodulated reference signal with remaining CSI-RS mapping position.

It should be noted that, what the position that above-mentioned three kinds of feasible embodiments only limit the above-mentioned demodulated reference signal of the first equipment transmission had been used no more than the first equipment, or it is untapped, or using the mapping position for adding untapped CSI-RS, how specifically what is used is mapped to above-mentioned demodulated reference signal, or it is untapped, or using the mapping position for adding untapped CSI-RS and be not especially limited, that is, specific to Fig. 1, if the mapping position for the CSI-RS that the first equipment can be used（Including using the mapping position for adding untapped CSI-RS）The resource location constituted for all crossbanding RE, then, the position that the first equipment sends above-mentioned demodulated reference signal on a PRB pair is no more than the resource location that all crossbanding RE are constituted in Fig. 1.

With entering a Walk, above-mentioned demodulated reference signal can be CSI-RS or the first DM-RS or the 2nd DM-RS.Specifically, CSI-RS is to be used for performing channel condition information in the prior art（Channel State Information, abbreviation CSI) measure the reference signal operated；First DM-RS be without precoding be used for carry out the demodulated reference signal of data demodulation, from resource mapping method for, it is mapped to according to CSI-RS mapping mode on the position of the above-mentioned transmission demodulated reference signal in Physical Resource Block；2nd DM-RS is the demodulated reference signal for being used to carry out data demodulation by precoding, for from resource mapping method, it is that the DM-RS sent in Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode, and default mapping mode here can be any predetermined manner of the mapping mode different from CSI-RS.

It should be noted that, above-mentioned first DM-RS and the 2nd DM-RS with DM-RS of the prior art, the DM-RS that positive 45 ° are tiltedly rule on RE in namely Fig. 1 is different, here difference is their mapping position differences in a PRB pair, but its specific sequence generating mode is not limited, may be identical or different with existing DM-RS, it is also possible to identical or different with existing CSI-RS.Specific to Fig. 1, the first DM-RS and the 2nd DM-RS are not to be mapped in positive 45 ° tiltedly to rule on RE, but are mapped on the resource location of crossbanding RE compositions.

First equipment is determined to send behind the position of demodulated reference signal in Physical Resource Block, and in order to ensure that the 2nd UE can carry out data demodulation with above-mentioned demodulated reference signal, the first equipment can be sent to the 2nd UE Configuration information, is used to refer to position of the above-mentioned demodulated reference signal in Physical Resource Block.

The position of above-mentioned demodulated reference signal is sent when the first equipment is determined, is concurrently sent after configuration information, you can send demodulated reference signal on the position of above-mentioned transmission demodulated reference signal in Physical Resource Block.Because the first equipment have sent configuration information, therefore, the 2nd UE can be according to configuration information, and the position of above-mentioned transmission demodulated reference signal receives above-mentioned demodulated reference signal in Physical Resource Block, so as to complete data demodulation.

It should be noted that the execution sequence rapid to above-mentioned three Walk and being not specifically limited here, in practice, three rapid execution sequences of Walk can be adjusted flexibly as needed.

In addition, here it is not intended to limit the 2nd UE quantity, that is, the demodulated reference signal can be used at least one the 2nd UE data demodulation, that is the first equipment need to only ensure that the location sets for being sent to multiple 2nd UE demodulated reference signal are no more than the position of above-mentioned transmission demodulated reference signal, just at least one the 2nd UE it can send its respective demodulated reference signal in same Physical Resource Block, so that at least one the 2nd UE can use same time domain and frequency domain resource, and respective data demodulation is completed according to respective demodulated reference signal.

The transmission method of the demodulated reference signal of above-described embodiment, determined to send the position of demodulated reference signal in Physical Resource Block by the first equipment, the position of the transmission demodulated reference signal includes what the first equipment had been used, or it is untapped, or the mapping position for adding untapped CSI-RS used, and to the 2nd UE send configurations information to indicate position of the demodulated reference signal in above-mentioned Physical Resource Block, so that the 2nd UE can carry out data demodulation according to the demodulated reference signal of reception.Due to the position transmission demodulated reference signal of the above-mentioned transmission demodulated reference signal of the first equipment, it therefore, it can support the data demodulation of more users.Fig. 3 is a kind of flow chart of the transmission method for demodulated reference signal that the embodiment of the present invention two is provided.As shown in figure 3, the transmission method of the demodulated reference signal of the present embodiment, can include rapid with lower Walk to wrap：The rapid S200 of Walk, the 2nd UE receive the configuration information that the first equipment is sent, and configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block.

The demodulated reference signal of the first equipment transmission is received on the rapid S201 of Walk, the 2nd the UE position that configuration information is indicated in Physical Resource Block, the position that configuration information is indicated includes CSI-RS that the first equipment has been used and/or untapped mapping position, and demodulated reference signal is used for the data for demodulating second user equipment.

Executive agent rapid each Walk is the 2nd UE in the present embodiment, in practice, and the 2nd UE can be The corresponding UE of LTE redactions.

After the first equipment is to the 2nd UE send configurations information and demodulated reference signal, the 2nd UE needs to receive above-mentioned configuration information and demodulated reference signal.

2nd UE can determine position of the above-mentioned demodulated reference signal in Physical Resource Block according to the configuration information of reception, and the position indicated in the configuration information receives above-mentioned demodulated reference signal.

The transmission method of the demodulated reference signal of above-described embodiment, receives demodulated reference signal, so as to carry out data demodulation according to above-mentioned demodulated reference signal by the 2nd UE according on the configuration information position that configuration information is indicated in Physical Resource Block.Because the 2nd UE demodulated reference signal has been used in the first equipment, or it is untapped, or in the mapping position for adding untapped CSI-RS used, it is thereby achieved that the data demodulation of more users.Fig. 4 is the interaction diagrams of a kind of first equipment that the embodiment of the present invention three is provided and second user equipment.When the demodulated reference signal that the present embodiment describes the transmission of the first equipment in detail is a CSI-RS or DM-RS, the specific interaction of the first equipment and second user equipment, i.e. the 2nd UE.As shown in figure 4, the transmission method of the demodulated reference signal of the present embodiment, can include rapid with lower Walk to wrap：

The rapid S300 of Walk, the first equipment determine to send CSI-RS or the first DM-RS position in Physical Resource Block.

Executive agent rapid this Walk is the first equipment, in practice, and first equipment both can be the network equipment, such as base station, via node or the UE with communication function between UE.

Specifically, the first equipment can determine to send CSI-RS or the first DM-RS position.Above-mentioned transmission CSI-RS or the first DM-RS position include having used, or untapped, or using the mapping position for adding untapped CSI-RS.Above-mentioned CSI-RS mapping position be Long Term Evolution LTE system version Rel-10 defined in Physical Resource Block in be used for place CSI-RS all RE location sets.Specific to Fig. 1, the resource location of as all crossbanding RE compositions.

It is used as the first situation, when the CSI-RS mapping positions that above-mentioned transmission CSI-RS or the first DM-RS position has used for the first equipment, the first equipment determines identical with the mapping position for the CSI-RS that it is sent to the first UE to the 2nd UE transmissions CSI-RS or the first DM-RS position.Specifically, as a kind of feasible implementation, the first equipment can send CSI-RS as the 2nd UE demodulated reference signal.Because CSI-RS transmission is full bandwidth, thus the 2nd UE can also receive the CSI-RS that the first equipment is sent to the first UE, that is, now mapping position of first equipment in above-mentioned CSI-RS On to be sent to the 2nd UE demodulated reference signal be that the first UE CSI-RS is sent in above-mentioned CSI-RS mapping position.As another feasible implementation, the first equipment can send the first DM-RS as the 2nd UE demodulated reference signal.That is, first equipment can send the first DM-RS in the first UE CSI-RS mapping position, certainly, because above-mentioned CSI-RS mapping position is used for placing the first UE CSI-RS, now send the first DM-RS in same position for the 2nd UE again, interference may be produced, therefore, such a implementation can be used as a kind of solution of suboptimum.Generally speaking, in this case, first equipment need not configure new CSI-RS mapping position for the 2nd UE, it is not required that new CSI-RS is sent for the 2nd UE, and only the 2nd UE need to be notified to do data demodulation in the CSI-RS of existing equipment mapping position.

It is used as second of situation, when above-mentioned transmission CSI-RS or the first DM-RS position is the untapped CSI-RS of the first equipment mapping position, first equipment determine to the 2nd UE send demodulated reference signal position for all available CSI-RS of the first equipment mapping position subtract be used for send the first UE CSI-RS mapping position after, remaining CSI-RS mapping position.Specifically, as a kind of feasible implementation, the first equipment can send CSI-RS as the 2nd UE demodulated reference signal..Due to now the first equipment and above-mentioned CSI-RS mapping positions are not used, therefore, the first equipment can send CSI-RS in untapped CSI-RS mapping positions, be used as demodulated reference signal.CSI-RS is sent in the CSI-RS used mapping position from the first equipment different as the situation of demodulated reference signal, now the first equipment is not multiplexed the CSI-RS used mapping position, but new CSI-RS mapping position transmission demodulated reference signal is used, that is, the first equipment needs to be CSI-RS of the 2nd UE configurations in addition to the first UE CSI-RS as demodulated reference signal.As another feasible implementation, the first equipment can send the first DM-RS as the 2nd UE demodulated reference signal.The situation of the first implementation of situation now to this section is similar, and only the first DM-RS sequence generating mode may be different from CSI-RS.

It is used as the third situation, when above-mentioned transmission CSI-RS or the first DM-RS position is that the first equipment has used the mapping position for adding untapped CSI-RS, the first equipment determines to use the mapping position sum for adding untapped CSI-RS for the first equipment to the position of the 2nd UE transmission demodulated reference signals.Specifically, when above-mentioned transmission CSI-RS or the first DM-RS position is the CSI-RS used mapping position, its specific implementation is identical with the description of above the first situation, when above-mentioned transmission CSI-RS or the first DM-RS position is respectively untapped CSI-RS mapping position, its specific implementation is identical with the description of above second of situation, will not be repeated here. It should be noted that because CSI-RS is for doing channel condition information（Channel State Information, abbreviation CSI) measurement, therefore, first equipment does not do precoding when sending CSI-RS to it, therefore, when above-mentioned demodulated reference signal is CSI-RS, the first equipment also needs to send precoding configured information for the 2nd UE, so that the 2nd UE can carry out data demodulation according to the CSI-RS and precoding information.Because the first DM-RS is equally non-precoded, thus it is identical with CSI-RS situations, it is also desirable to send precoding configured information for the 2nd UE.

In addition, in existing LTE Rel-10, CSI-RS is that full bandwidth is sent to existing UE, in such scheme, when demodulated reference signal is CSI-RS, the first equipment can determine to send CSI-RS on full bandwidth or the 2nd UE dedicated bandwidth.Likewise, the first equipment can also determine to send the first DM-RS on full bandwidth or the 2nd UE dedicated bandwidth.That is, the transmission bandwidth to above-mentioned demodulated reference signal is not limited herein.

The rapid S301 of Walk, the first equipment are to the 2nd UE send configuration information, and configuration information is used to indicate the position of CSI-RS or the first DM-RS in Physical Resource Block.

Specifically, the first equipment determines to send behind CSI-RS or the first DM-RS position in Physical Resource Block, in addition it is also necessary to the 2nd UE send configuration information, to indicate the position of CSI-RS or the first DM-RS in Physical Resource Block.

Jin mono- Walk, in the past the definition in face of the first DM-RS is understood, first DM-RS is also to be mapped to according to CSI-RS mapping mode in Physical Resource Block, therefore, first equipment can be with the CSI-RS signalings of the non-zero power defined in LTE Rel-10 as configuration information, to notify position of the 2nd above-mentioned demodulated reference signals of UE in Physical Resource Block.

The CSI-RS signalings of above-mentioned non-zero power are to be handed down to UE by base station, the signaling for indicating positions of the CSI-RS in Physical Resource Block.Specifically, the CSI-RS signalings of above-mentioned non-zero power include the following parameter in table 1 and table 2：CSI-RS configuration numbering, CSI-RS antenna port configuration quantity, the sub-frame configuration for sending CSI-RS, CSI-RS transmission cycle and CSI-RS sub-frame offset.By above-mentioned several parameters, the first equipment just can indicate position of the demodulated reference signal in Physical Resource Block for the second UE.

Particularly, for the first DM-RS, the CSI-RS signalings of above-mentioned non-zero power be additionally included in the power on PDSCH each RE with it is every on above-mentioned transmission CSI-RS or the first DM-RS position The energy of individual resource unit（Energy Per Resource Element, abbreviation EPRE) ratio p-C, the unit of the ratio is decibel（dB ) .If for example, p-C=- 3, then it represents that the power on PDSCH signals is 1/2 of the power of signal on above-mentioned transmission CSI-RS or the first DM-RS position.

Optionally, above-mentioned configuration information can be positioned over Downlink Control Information by the first equipment（Downlink Control Information, abbreviation DCI) in, the 2nd UE is then handed down to, to indicate the position of above-mentioned CSI-RS or the first DM-RS in Physical Resource Block.Certainly, it is contemplated that the corresponding signaling word of CSI-RS signalings of non-zero power is more, and the first equipment can also use radio resource control（Radio Resource Control, abbreviation RRC) signaling indicated to the 2nd UE, when indicating, the first equipment needs clearly to specify the mapping position of the CSI-RS indicated by the CSI-RS signalings of above-mentioned non-zero power to use for doing data demodulation to the 2nd UE.

The rapid S302 of Walk, the first equipment send precoding to the 2nd UE and indicated.

Specifically, because above-mentioned CSI-RS or the first DM-RS are without precoding, and the data that the first equipment is sent to the 2nd UE are data after precoding, therefore, in order to allow the 2nd UE to carry out data demodulation, first equipment also needs to send precoding instruction for the 2nd UE, the precoding indicates the precoding information of the user data for indicating the 2nd UE, so that the 2nd UE can carry out data demodulation according to the CSI-RS or the first DM-RS, and above-mentioned precoding information.

Optionally, provide that the first equipment at least needs to indicate above-mentioned precoding information with two signaling words on the agreement of user data precoding according to existing LTE Rel-10, a signaling word is transmitting pre-coding matrix instruction（Transmitted Precoding Matrix Indicator, abbreviation TPMI), another signaling word is that PMI confirms signaling word.Specifically, the first equipment can use TPMI to indicate that it has used which of code book code word specified in the agreement of LTE Rel-8 and follow-up evolution in the bandwidth for sending CSI-RS or the first DM-RS；PMI confirms that signaling is then used to refer to be sent to the 2nd UE data and uses the code word of which kind of precoding.

Specifically, have 4 code words in number of the TPMI bit number not less than code word in the corresponding code book of antenna port number of the 2nd UE of the first equipment transmission data, such as corresponding code book of 2 antenna ports, therefore TPMI minimums can be 2 bits；There are 16 code words in the corresponding code book of 4 antenna ports, therefore TPMI minimums can be 4 bits；There are 64 code words in the corresponding code book of 8 antenna ports, therefore TPMI minimums can be 8 bits；When there is more antennas port to send data, such as 32 antenna ports, then TPMI Bit number should be not less than the number of code word in the corresponding code book of 32 antenna ports, for example, TPMI minimums can be 32 bits.

With entering a Walk, PMI confirms that the number of bits of signaling does not have concrete restriction, as long as can indicate the data for being sent to the 2nd UE use the code word of which kind of precoding.For example, PMI confirms that signaling can use 1 bit to represent, if its value is 0, then it represents that the code word that is indicated using TPMI does precoding；If its value is 1, then it represents that used in the recent PMI value that the first equipment is reported by aperiodic CSI.For different systems, recent aperiodic CSI reports time interval value to be different.FDD system is 4 milliseconds, and TDD system is that minimum interval is 4 milliseconds.In addition, uplink-downlink configuration is than difference, above-mentioned spacing value also can be different, and specific value can follow the related regulations of LTE protocol TDD and carry out.

When implementing, above-mentioned signaling word can as certain signaling part, the 2nd UE is handed down to by the first equipment.Because TPMI and PMI confirms that signaling word is that, for carrying out data demodulation, therefore, TPMI and PMI confirm that signaling word should indicate that in LTE, this quick signaling can be DCI with quick signaling.In order to realize above-mentioned instruction, it is necessary to design new DCI, indicated with carrying above-mentioned precoding wherein.Confirm to make the two signaling words of word it should be noted that at least to include TPMI and PMI in new DCI.Certainly, TPMI and PMI confirmation letters can also be indicated with RRC signaling it should be noted that; the rapid S302 of Walk be just needed in the case where the first equipment does not do precoding to data perform, that is, if the first equipment has done precoding to data, the demodulated reference signal that so the 2nd UE directly can be sent with the first equipment carries out data demodulation, and demodulated reference signal now can be the 2nd DM-RS, and such case can be described in detail in follow-up embodiment.

The rapid S303 of Walk, the first equipment send the first configured information to the 2nd UE.

Specifically, when the 2nd UE and other equipment are multiplexed identical Physical Resource Block, that is, do not only have the 2nd UE demodulated reference signal and data on same Physical Resource Block, when also having demodulated reference signal and the data of other equipment, the first equipment needs to send the first configured information to the 2nd UE.It should be noted that other equipment herein, both can be the first UE or remaining the 2nd UE defined above.

With entering a Walk, the first configured information is used to indicate that the 2nd UE carries out speed in Physical Resource Block Match somebody with somebody or interferometry position.That is, the position that the 2nd UE can be indicated according to the first configured information, carries out rate-matched or interferometry operation.In practice, it is specifically to do rate-matched or interferometry in the position, is determined by the first equipment scheduling.

Geng Jin mono- Walk, if above-mentioned Physical Resource Block includes the position that at least one the first UE sends DM-RS, that is, there is at least one the first UE and the 2nd UE to share identical Physical Resource Block, now, the position that above-mentioned first configured information is indicated needs to include positions of all first UE DM-RS in Physical Resource Block.2nd UE is needed on the DM-RS of all first UE indicated by the first configured information position, does rate-matched or interferometry.

Geng Jin mono- Walk, because above-mentioned CSI-RS or the first DM-RS can be used for demodulation two or more the 2nd UE data, therefore, if above-mentioned Physical Resource Block includes at least one the 2nd UE demodulated reference signal and data, the position that first configured information is indicated needs to be included in the position for the demodulated reference signal that other the 2nd UE in the UE of two or more the 2nd in addition to the 2nd UE are sent on Physical Resource Block, that is the 2nd UE is needed on the position of the demodulated reference signal of remaining the 2nd UE indicated by the first configured information, do rate-matched or interferometry.

Specific to implementation, when demodulated reference signal is a CSI-RS or DM-RS, the first configured information can be the CSI-RS signalings of the zero energy in existing protocol.It is that UE is informed by upper strata RRC signaling in practice, current CSI-RS configuration information is specifically any in the two.It should be noted that Bing Bu Xian Ding Walk rapid S301, S302 and S303 sequencing here, i.e., in practice, the execution sequence of this three can be adjusted flexibly.In addition, above-mentioned configuration information, the first configured information and the second configured information can be sent by a signaling, the transmission of two or three signalings can also be divided into.

The position that the rapid S304 of Walk, the first equipment send CSI-RS in Physical Resource Block sends CSI-RS, or, the position that the first equipment sends the first DM-RS in Physical Resource Block sends the first DM-RS.

Specifically, the CSI-RS or the first DM-RS that are sent to the 2nd UE position is determined when the first equipment, and after have sent related signaling to the 2nd UE, it is possible to send CSI-RS or the first DM-RS to the 2nd UE.

It should be noted that, generally, because above-mentioned CSI-RS or the first DM-RS are for carrying out data demodulation, therefore, first equipment can first signaling send out CSI-RS or the first DM-RS again, but here Zhi Xian Ding Walk rapid S300 and S304 need successively perform, as signaling and CSI-RS or first The sequencing of DM-RS transmission, then do not do considered critical.

In addition, optional, the first equipment can also send the 3rd indication signaling to base station, and base station herein refers to the equipment for possessing Base Transmitter function, and is not specific to existing base station.Specifically, above-mentioned 3rd indication signaling is used for the position of the 2nd UE of instruction CSI-RS or the first DM-RS in Physical Resource Block, so that the position of the 2nd UE CSI-RS or the first DM-RS in Physical Resource Block is reserved in base station.For example; in order to limit and reduce the co-channel interference between multiple cells; information to the 2nd the UE CSI-RS sent or the first the DM-RS resource location taken can be sent to neighbor cell or emitter by the first equipment; namely base station, so that neighbor cell or emitter are vacated corresponding resource location and protected come the CSI-RS or the first DM-RS sent to the first equipment.

The rapid S305 of Walk, the 2nd UE receive the configuration information that the first equipment is sent.

Specifically, because the first equipment to the 2nd UE have sent configuration information, therefore, the 2nd UE needs to receive above-mentioned configuration information, and determines the position of CSI-RS or the first DM-RS in Physical Resource Block according to the configuration information.

The rapid S306 of Walk, the 2nd UE receive the precoding instruction that the first equipment is sent.

Specifically, because the first equipment is to second_UEPrecoding instruction is have sent, therefore, the 2nd UE needs to receive above-mentioned precoding instruction, and the precoding information of the data according to the 2nd UE of precoding instruction acquisition.

The rapid S307 of Walk, the 2nd UE receive the first configured information that the first equipment is sent.

Specifically, because the first equipment to the 2nd UE have sent the first configured information, therefore, the 2nd UE needs to receive above-mentioned first configured information, and the position in the Physical Resource Block according to indicated by first configured information carries out rate-matched or interferometry.

In practice, above-mentioned first configured information can be by the CSI-RS signaling bears of zero energy.Position in the Physical Resource Block that the rapid S308 of Walk, the 2nd UE are indicated according to the first configured information, carries out rate-matched or interferometry. Executive agent rapid each Walk is the 2nd UE in the present embodiment, in practice, and the 2nd UE can be the corresponding UE of LTE redactions.

Specifically, the 2nd UE is after the first configured information is received, position that can be in the Physical Resource Block indicated by the signaling carries out rate-matched or interferometry.

It should be noted that similar Yu Walk rapid S301, S302 and S303 order, Bing Bu Xian Ding the rapid S307 of Walk rapid S306, Walk He the rapid S308 of Walk sequencing here.2nd UE performs the sequences of above-mentioned three Walk suddenly can be corresponding with the order of the first equipment, can not also correspond to.In practice, the transmission of the first equipment and the 2nd UE reception order can be adjusted flexibly as needed.

The position that the rapid S309 of Walk, the 2nd UE send CSI-RS in Physical Resource Block receives the CSI-RS that the first equipment is sent, or, the position that the 2nd UE sends the first DM-RS in Physical Resource Block receives the first DM-RS that the first equipment is sent.

Specifically, because the first equipment to the 2nd UE have sent CSI-RS or the first DM-RS, therefore, the 2nd UE needs to receive above-mentioned CSI-RS or the first DM-RS.Specifically, the 2nd UE needs to receive above-mentioned CSI-RS or the first DM-RS in the position in Physical Resource Block of CSI-RS or the first DM-RS that above-mentioned configuration information is indicated.

The rapid S310 of Walk, the 2nd UE carry out user data demodulation according to CSI-RS or the first DM-RS, and precoding information.

Executive agent rapid each Walk is the 2nd UE in the present embodiment, in practice, and the 2nd UE can be

The corresponding UE of LTE redactions.

Specifically, because the demodulated reference signal that the first equipment is sent to the 2nd UE is CSI-RS or the first DM-RS, namely without the reference signal of precoding, therefore, 2nd UE needs to integrate the CSI-RS or the first DM-RS precoding informations indicated with above-mentioned precoding instruction, carry out user data demodulation, that is, the 2nd UE data demodulation.

It should be noted that because the first equipment is that first signaling sends out CSI-RS or the first DM-RS again, therefore the 2nd UE is first to receive signaling to receive CSI-RS or the first DM-RS again.In practice, the transmission order of the first equipment is not fixed, therefore, does not also do strictly being limited to clearer description such scheme to the 2nd UE reception order here, with reference to the resource occupation figure on the PRB pair in Fig. 1 How sample, describe first base station in detail according to the different CSI-RS of table 1 position mapping mode, it is determined that CSI-RS or the first DM-RS position is sent, so as to neatly support more users to demodulate.

Fig. 5 is resource maps of a kind of CSI-RS of 4 antenna port in a PRB pair under LTE Rel-10 normal cyclic prefix.The connotation that the RE of different patterns is represented in Fig. 5 is identical with Fig. 1, and here is omitted.

Specifically, the first equipment can send demodulated reference signal, g Jie CSI-RS or the first DM-RS according to the CSI-RS mapping positions shown in Fig. 5.As shown in figure 5, now CSI-RS occupies 4 RE, i.e., the crossbanding RE in figure altogether in a PRB pair, that is to say, that the first equipment can send CSI-RS or the first DM-RS in above-mentioned 4 RE position.Above-mentioned 4 RE position can be it is that the first equipment has been used or untapped or used plus untapped CSI-RS mapping position.

With entering a Walk, the first equipment can signal above-mentioned 4 RE of the 2nd UE position with the CSI-RS of non-zero power.Specific to Fig. 5, so that CSI-RS configures numbering and the antenna port number sent as an example, according to table 1, the antenna port number for sending CSI-RS can be configured to 4 by the first equipment, and CSI-RS configurations numbering is configured to 0, you can indicate the CSI-RS of above-mentioned 4 antenna ports position mapping mode.It should be noted that also needing the relevant parameter in allocation list 2 in practice, to indicate the subframe sequence number for sending CSI-RS, its configuration mode is identical with the description of table 2.The antenna port number that CSI-RS configuration numberings when latter embodiments only briefly explain diverse location mappings of the CSI-RS in Physical Resource Block are configured and sent, the configuration on table 2 is repeated no more.

Geng Jin mono- Walk, because the RE numbers shared by the demodulated reference signal required for one data flow of demodulation are different, RE numbers required for the data demodulation of i.e. one data flow are different, it therefore, it can do different distribution to 4 RE of the CSI-RS occupancy of above-mentioned 4 antenna ports.

If specifically, the corresponding RE numbers of data demodulation 2 CSI-RS antenna ports of needs of a data flow, i.e., 2 RE, then the first equipment is maximum can support the data demodulation of 2 data flows simultaneously；If the data of a data flow, which are demodulated, needs the corresponding RE numbers of average 1 CSI-RS antenna port, i.e., 1 RE, then first the first equipment of equipment maximum can support the data demodulation of 4 data flows simultaneously.The explanation into a Walk is done so that the data demodulation of a data flow needs the corresponding RE numbers of 2 CSI-RS antenna ports as an example below.Specific to number of users, the data fluxion that the number for the 2nd UE that the first equipment can be supported according to actual needs and each 2nd UE need determines how above-mentioned 2 data flows of distribution.For example, the first equipment can support the 2nd UE that a data fluxion is 2 with above-mentioned 4 RE;First equipment can also support two the 2nd UE that two data streams number is 1. It should be noted that above-mentioned 4 antenna ports are the CSI-RS antenna ports for sending CSI-RS, the mapping relations sent from the first equipment between CSI-RS antenna port and the physical antenna port of the first equipment are not limited here.In practice, when the first equipment is realized can by multiple physical antenna port virtuals into one transmission CSI-RS antenna port.Virtual mode can dynamically select one in multiple physical antenna ports, or the mode by multiple physical antenna ports Jing Guo precoding generates transmission CSI-RS antenna port.

In addition, the first equipment can also be determined to send CSI-RS or the first DM-RS position according to the 2nd UE channel condition information in Physical Resource Block.That is, for the 2nd UE in varying environment, the first equipment can use the CSI-RS different from the other configurations of the CSI-RS engaged positions in Fig. 5 to be used to send CSI-RS or the first DM-RS.

Specifically, due in 4 crossbanding RE being provided in Fig. 5, using every 2 close to RE as one group, this two groups of RE are respectively positioned in time domain in identical OFDM symbol, therefore, transmission CSI-RS that Fig. 5 is provided or the first DM-RS position are stablized relatively in time due to it, thus are more suitable for the stronger scene of the frequency domain selectivity of the 2nd UE channel.Certainly, the first equipment can also select other CSI-RS position mapping mode, to enable the demodulated reference signal for issuing the 2nd UE to stagger in time domain and frequency domain.

Resource maps of the CSI-RS of 2 antenna ports of two kinds of configurations in a PRB pair under the normal cyclic prefix that Fig. 6 is LTE Rel-10.The connotation that the RE of different patterns is represented in Fig. 6 is identical with Fig. 1, and here is omitted.As shown in fig. 6, itself and Fig. 5 difference are that now 4 in Fig. 6 crossbanding RE can be with the position mapping mode of CSI-RS during two in corresponding table 1,2 antenna port.

Specifically, according to table 1, the antenna port number for sending CSI-RS can be configured to 2 by the first equipment, and CSI-RS configurations numbering is configured into 0 and 19, you can indicate the CSI-RS of the antenna port of above-mentioned two 2 position mapping mode.

Jin mono- Walk, when the first equipment sends a CSI-RS or DM-RS according to the CSI-RS mapping positions shown in Fig. 6, as above to described by Fig. 5, the difference of RE numbers according to required for being demodulated the data of each data flow, the first equipment maximum can also support the data demodulation of 2 or 4 data flows simultaneously.As to how above-mentioned 2 data flows of distribution, identical with the description for Fig. 5, it will not be repeated here.

In addition, the data fluxion that the first equipment can also be supported according to actual needs, sends CSI-RS or the first DM-RS in more CSI-RS mapping positions, illustrates this point with reference to Fig. 7.

Fig. 7 is a kind of CSI-RS of 8 antenna port under LTE Rel-10 normal cyclic prefix at one Resource map in PRB pair.The connotation that the RE of different patterns is represented in Fig. 7 is identical with Fig. 1, and here is omitted.As shown in fig. 7, now 8 crossbanding RE in Fig. 7 can be with the position mapping mode of CSI-RS during two in corresponding table 1,4 antenna port.

Specifically, according to table 1, the antenna port number for sending CSI-RS can be configured to 4 by the first equipment, and CSI-RS configurations numbering is configured into 0 and 9, you can indicate the CSI-RS of the antenna port of above-mentioned two 4 position mapping mode.

Jin mono- Walk, when the first equipment sends a CSI-RS or DM-RS according to the CSI-RS mapping positions shown in Fig. 7, same, as above to described by Fig. 5, the difference of RE numbers according to required for being demodulated the data of each data flow, the first equipment maximum can support the data demodulation of 2 or 4 or 8 data flows simultaneously.By taking the data demodulation that the first equipment maximum can support 8 data flows simultaneously as an example, specific to number of users, the data fluxion that the number for the 2nd UE that first equipment can be supported according to actual needs and each 2nd UE need, determines how above-mentioned 8 data flows of distribution.For example, the first equipment can support the 2nd UE that a data fluxion is 8 with above-mentioned 8 RE;First equipment can also support two the 2nd UE that two data streams number is 4;First equipment can also support the 2nd UE that four data fluxions are 2.

It should be noted that, because UE on different bandwidth is transmitted in the way of frequency division multiplexing, therefore, when the first equipment sends CSI-RS on full bandwidth, first equipment can both demodulate for the UE configuration identical CSI-RS on different bandwidth, can also be configured to different CSI-RS to demodulate.

It is, of course, also possible to using other various configuration modes, will not enumerate here.However, which kind of mode used, first equipment with CSI-RS mapping positions when sending a CSI-RS or DM-RS, configuration information only need to be passed through, the namely rapid S301 of Shang Shu Walk, the configuration information of CSI-RS for realizing data demodulation is sent to the 2nd UE, it can be achieved to demodulate the data of more data stream, so as to support more UE.Here support more, both included the previously described data demodulation for realizing the 2nd UE with CSI-RS on different bandwidths, and also included the 2nd UE and the first UE MU-MIMO.The MU-MIMO how the first equipment realizes the 2nd UE and the first UE is described in detail with reference to Fig. 8.

Fig. 8 is a resource map when second user equipment and the first user equipment carry out the MU-MIMO of space division multiplexing.The connotation that the RE of different patterns is represented in Fig. 8 is identical with Fig. 1, and here is omitted.It should be noted that minus 45 ° a plurality of oblique line RE in positive 45 ° in the left side figure being not intended to limit here in the first UE quantity, figure tiltedly rule RE and right figures can for all first UE maximums The resource location for the DM-RS that can be taken.

Specifically, crossbanding RE on the left of Fig. 8 in figure represents the mapping position for the CSI-RS that the first UE is used, these CSI-RS both can be the CSI-RS of non-zero power, can also be the CSI-RS of zero energy, and each which kind of specifically used CSI-RS of first UE is not limited here, its position mapping mode is same as the prior art.From the point of view of contrast, crossbanding RE in Fig. 8 right figures represents that the 2nd UE is used for doing the CSI-RS or the first DM-RS of data demodulation mapping position, it can be seen that, in same Physical Resource Block, 2nd UE does not need to use the DM-RS positions of existing equipment to do data demodulation, but the first UE CSI-RS mapping position is taken, so it is achieved that the 2nd UE and the first UE MU-MIMO.

With entering a Walk, in order to avoid being interfered to the first UE, the 2nd UE needs have equipment existing

Any data are not sent on DM-RS port, that is, do the DM-RS for the first UE that minus 45 ° in rate-matched, that is, Fig. 8 right figure a plurality of oblique line RE are represented position.Certainly, given here is situation when the first UE occupies all DM-RS available resources, and in practice, the 2nd UE only need to do rate-matched in the DM-RS of the actual occupancy of existing equipment resource location.In addition, the first equipment also needs to root according to the description for above stating the rapid S303 of Walk, indicate do rate-matched on which position to the 2nd UE using the first configured information.

It should be noted that, Fig. 8 is not intended to limit the 2nd UE quantity, due to Fig. 8 and Fig. 7-sample, the position mapping mode of CSI-RS when 8 RE now can correspond to 8 antenna port a kind of, the position mapping mode of CSI-RS when can also correspond to two 4 antenna ports, equally as above to described by Fig. 5, the difference of RE numbers according to required for being demodulated the data of each data flow, above-mentioned 8 RE maximums can support the data demodulation of 2 or 4 or 8 data flows simultaneously, so that maximum supports 8 data flows as an example, how above-mentioned 8 data flow is distributed, it is identical with the description for Fig. 7, it will not be repeated here.That is, the first equipment can configure multiple the 2nd different UE using different CSI-RS, so as on identical running time-frequency resource, realize the space division multiplexing with the first UE MU-MIMO.

Can as can be seen from Figure 8, the first UE maximum 8 data flows of support simultaneously of DM-RS, and second

8 crossbanding RE that UE takes maximum can also support 8 data flows simultaneously, therefore the first equipment maximum can support the data demodulation of 16 data flows simultaneously, compared to prior art, the space division multiplexing MU-MIMO abilities of the first equipment are doubled.

The transmission method of the demodulated reference signal of above-described embodiment, it is not necessary to design new DM-RS resource mapping methods for the 2nd UE, it is not required that take the first UE DM-RS position, only need to be by the One equipment is according to the 2nd UE actual channel situation, it is determined that first equipment has been used in Physical Resource Block, or it is untapped, or used plus untapped CSI-RS mapping position on send demodulated reference signal, that is CSI-RS or the first DM-RS, and utilize the existing position for signaling the 2nd above-mentioned demodulated reference signals of UE, the 2nd UE can be made to complete data demodulation, therefore, in the case of no overhead, the data demodulation of more users can be supported.Fig. 9 is the interaction diagrams of a kind of first equipment that the embodiment of the present invention four is provided and second user equipment.When the demodulated reference signal that the present embodiment describes the transmission of the first equipment in detail is two DM-RS, the specific interaction of the first equipment and second user equipment, i.e. the 2nd UE.As shown in figure 9, the transmission method of the demodulated reference signal of the present embodiment, can include rapid with lower Walk to wrap：

The rapid S400 of Walk, the first equipment determine to send the 2nd DM-RS position in Physical Resource Block.Executive agent rapid this Walk is the first equipment, in practice, and first equipment both can be the network equipment, such as base station, via node or the UE with communication function between UE.

Specifically, the first equipment can determine sending the 2nd DM-RS position.The above-mentioned DM-RS of transmission the 2nd position includes having used, or untapped, or using the mapping position for adding untapped CSI-RS.Above-mentioned CSI-RS mapping position be Long Term Evolution LTE system version Rel-10 defined in Physical Resource Block in be used for place CSI-RS all RE location sets.Specific to Fig. 1, the resource location of as all crossbanding RE compositions.

It is used as the first situation, when the CSI-RS mapping positions that the above-mentioned DM-RS of transmission the 2nd position has used for the first equipment, the first equipment determines identical with the mapping position for the CSI-RS that it is sent to the first UE to the 2nd DM-RS of the 2nd UE transmissions position.Specifically, first equipment can send the 2nd DM-RS in the first UE CSI-RS mapping position, certainly, because above-mentioned CSI-RS mapping position is used for placing the first UE CSI-RS, now send the 2nd DM-RS in same position for the 2nd UE again, interference may be produced, therefore, such a implementation can be used as a kind of solution of suboptimum.Generally speaking, in this case, the first equipment need not configure new CSI-RS mapping position for the 2nd UE, and only the 2nd UE need to be notified to do data demodulation in the CSI-RS of existing equipment mapping position.

It is used as second of situation, when the above-mentioned DM-RS of transmission the 2nd position is the untapped CSI-RS of the first equipment mapping position, the first equipment determines to send the 2nd DM-RS position to the 2nd UE and subtract for all available CSI-RS of the first equipment mapping position to be used for the CSI-RS for sending the first UE Mapping position after, remaining CSI-RS mapping position.Specifically, due to now the first equipment and the above-mentioned DM-RS of transmission the 2nd position is not used, therefore, the first equipment can send the 2nd DM-RS in untapped CSI-RS mapping positions, be used as demodulated reference signal.DM-RS is sent in the CSI-RS used mapping position from the first equipment different as the situation of demodulated reference signal, now the first equipment is not multiplexed the CSI-RS used mapping position, but uses new CSI-RS mapping position to send demodulated reference signal.

It is used as the third situation, when the above-mentioned DM-RS of transmission the 2nd position is that the first equipment has used the mapping position for adding untapped CSI-RS, the first equipment determines to use the mapping position sum for adding untapped CSI-RS for the first equipment to the 2nd DM-RS of the 2nd UE transmissions position.Specifically, when the above-mentioned DM-RS of transmission the 2nd position has respectively been used, its specific implementation is identical with the description of above the first situation, when the above-mentioned DM-RS of transmission the 2nd position is respectively untapped, its specific implementation is identical with the description of above second of situation, will not be repeated here.

It should be noted that, different rapid S300 of Yu Walk, above-mentioned 2nd DM-RS is to be sent in the above-mentioned DM-RS of transmission the 2nd position, but the position mapping mode of its specific position mapping mode and CSI-RS is simultaneously differed, also, by the first equipment precoding, therefore the 2nd DM-RS is, first equipment sends precoding configured information also without for the 2nd UE, and the 2nd UE can carry out data demodulation according to the 2nd DM-RS.In addition, first equipment can not also carry out precoding to the 2nd DM-RS, that is the rapid S402 of Bu Zhi Hang Walk, and in addition to the rapid S310 of S409 Ying Yu Walk is identical, its remaining each Walk is equally applicable to the 2nd DM-RS without precoding suddenly, certainly, if the first equipment does not carry out precoding to the 2nd DM-RS, then need as described in embodiment two, precoding is sent before S404 to indicate, and above-mentioned precoding is received after S405 indicate, its detailed process and previous embodiment send and receive that precoding instruction is identical, and here is omitted.

In actual use, different position mapping sets can be configured for the 2nd DM-RS in advance, it for example may be referred to the CSI-RS configuration modes of Tables 1 and 2, the 2nd DM-RS available position is predefined, now the first equipment needs to indicate to send the 2nd DM-RS specific RE positions and above-mentioned 2nd DM-RS position mapping set for the 2nd UE.

As long as it should also be noted that, the first equipment sends the 2nd DM-RS bandwidth of the bandwidth not less than the data for sending the 2nd UE.First equipment can be that it selects the RE of corresponding density to send the 2nd DM-RS according to the 2nd UE actual channel situation.

The rapid S401 of Walk, the first equipment are to the 2nd UE send configuration information, and configuration information is used to indicate second Positions of the DM-RS in Physical Resource Block.

Specifically, the first equipment determines that the position that the 2nd DM-RS is sent in Physical Resource Block is sent after demodulated reference signal to the 2nd UE, in addition it is also necessary to the 2nd UE send configuration information, to indicate positions of the 2nd DM-RS in Physical Resource Block.

Because the 2nd DM-RS position mapping set is newly defined, it is therefore desirable to design new signaling and be used as configuration information.For example, can be with the format for the CSI-RS signalings for joining the non-zero power shone in the rapid S301 of Walk, parameter i.e. as shown in Table 1 and Table 2, quantity, sub-frame configuration are configured by the 2nd DM-RS configuration numbering, antenna port, cycle and sub-frame offset etc. are sent, to notify position of the 2nd above-mentioned demodulated reference signals of UE in Physical Resource Block.Optionally, above-mentioned configuration information can be positioned over Downlink Control Information by the first equipment（Downlink Control lnformation, abbreviation DCI), the 2nd UE is then handed down to, to indicate position of the above-mentioned demodulated reference signal in Physical Resource Block.Certainly, it is more in view of the corresponding signaling word of above-mentioned configuration information, first equipment can also use radio resource control (Radio Resource Control, abbreviation RRC) signaling indicated to the 2nd UE, when indicating, the first equipment needs clearly to specify the mapping position of the CSI-RS indicated by above-mentioned configuration information to use for doing data demodulation to the 2nd UE.

It should be noted that description of the root according to the rapid S201 of Walk, for the first DM-RS, first equipment also needs to issue p-C values for the 2nd UE, unlike, for the 2nd DM-RS, this ratio p-C can be fixed by way of agreement, therefore not need extra signaling to indicate.

The rapid S402 of Walk, the first equipment carry out precoding to the 2nd DM-RS.

Specifically, the first equipment can carry out precoding to the 2nd DM-RS, to allow the 2nd UE to complete data demodulation according to the 2nd DM-RS.Precoding mode herein to the 2nd DM-RS is identical with the precoding mode in the prior art to the first UE DM-RS, will not be repeated here.

The rapid S403 of Walk, the first equipment send the first configured information to the 2nd UE.

The specific descriptions of the Walk suddenly are identical with the rapid S303 of Walk, and difference is, because the 2nd DM-RS is not It is mapped according to CSI-RS position mapping mode in Physical Resource Block, therefore, the first configured information here can not be realized with the CSI-RS signalings of zero energy, but, in practice, the form of the CSI-RS signalings of zero energy can be borrowed, to design above-mentioned first configured information.

It should be noted that Bing Bu Xian Ding Walk rapid S401, S402 and S403 sequencing here, i.e., in practice, the execution sequence of this three can be adjusted flexibly.

The position that the rapid S404 of Walk, the first equipment send the 2nd DM-RS in Physical Resource Block sends the 2nd DM-RS.

Specifically, when the first equipment determines the 2nd DM-RS for being sent to the 2nd UE position, that is, send the 2nd DM-RS position, and after have sent related signaling to the 2nd UE, it is possible to send the 2nd DM-RS to the 2nd UE.

It should be noted that, generally, because the 2nd DM-RS is for carrying out data demodulation, therefore, first equipment can first signaling send out the 2nd DM-RS again, but only limit determines the successively execution of Walk rapid S400 and S404 needs here, as signaling and the 2nd DM-RS transmission, does not then do considered critical.

In addition, optional, the first equipment can also send the 3rd indication signaling to base station, and base station herein refers to the equipment for possessing Base Transmitter function, and is not specific to existing base station.Specifically, above-mentioned 3rd indication signaling is used for positions of the 2nd UE of instruction the 2nd DM-RS in Physical Resource Block, so that positions of the 2nd UE the 2nd DM-RS in Physical Resource Block is reserved in base station.For example; in order to limit and reduce the co-channel interference between multiple cells; the information of 2nd UE the 2nd DM-RS resource locations taken can be sent to neighbor cell or emitter by the first equipment; namely base station, is protected so that neighbor cell or emitter vacate corresponding resource location to the 2nd DM-RS that the first equipment is sent.

The rapid S405 of Walk, the 2nd UE receive the configuration information that the first equipment is sent.

The rapid S406 of Walk, the 2nd UE receive the first configured information that the first equipment is sent.

Position in the Physical Resource Block that the rapid S407 of Walk, the 2nd UE are indicated according to the first configured information, carries out rate-matched or interferometry.

The position that the rapid S408 of Walk, the 2nd UE send the 2nd DM-RS in Physical Resource Block receives the 2nd DM-RS that the first equipment is sent.

The identical , Walk rapid S406 ~ S408 Yu Walk of the Shang rapid S405 of Mian Walk Yu the rapid S305 of Walk description are rapid S307-S309 is identical, and difference is, it is necessary to which the CSI-RS or the first DM-RS in Walk rapid S305, S307-S309 are replaced with into the 2nd DM-RS.

In addition, in practice, above-mentioned first configured information can be by the CSI-RS signaling bears of zero energy.The rapid S409 of Walk, the 2nd UE carry out user data demodulation according to the 2nd DM-RS.

The corresponding UE of LTE redactions.

Specifically, because the 2nd UE of the first equipment transmission demodulated reference signal is the 2nd DM-RS, it is the reference signal Jing Guo precoding, therefore, 2nd UE can according to the 2nd DM-RS carry out user data demodulation, that is, the 2nd UE data demodulation.

Explanation is needed also exist for, because the first equipment is that first signaling sends out the 2nd DM-RS again, therefore the 2nd UE is first to receive signaling to receive the 2nd DM-RS again.In practice, the transmission order of the first equipment is not fixed, therefore, and the reception order to the 2nd UE does not also do considered critical here.

Because the 2nd DM-RS is to be mapped in the above-mentioned DM-RS of transmission the 2nd position, the mode that it maps is different from CSI-RS.This difference is embodied in, and CSI-RS is identical on all PRB pairs, and the 2nd DM-RS both can be with identical on adjacent PRB, can also be different.

For clearer description such scheme, with reference to the resource occupation pattern on the PRB pair in Fig. 1, resource map when multiple 2nd UE are MU-MIMO is described in detail.

Figure 10 carries out the resource map during MU-MIMO of space division multiplexing for two second user equipment under normal cyclic prefix in a PRB pair.The connotation that the RE of different patterns is represented in Figure 10 is identical with Fig. 1, and here is omitted.

Specifically, as shown in Figure 10, wherein, UE1 and UE2 be in the 2nd UE, figure crossbanding represent the RE positions that their the 2nd DM-RS takes.From left to right, from top to bottom, the RE positions that the 2nd DM-RS that first figure is UE1 takes, the RE positions that the 2nd DM-RS that second figure is UE2 takes, the RE positions that the 3rd figure is UE1 and UE2 the 2nd DM-RS takes jointly.

Jin mono- Walk, UE1 is identical with the resource impact pattern of the 2nd DM-RS on UE2 each PRB, although the RE positions that respective 2nd DM-RS of UE1 and UE2 take are different from CSI-RS position mapping mode, there is no corresponding CSI-RS configurations numbering corresponding with this RE arrangements in table 1, but UE1 and UE2 the 2nd DM-RS merges the resource taken, i.e. from left to right, the 3rd of number schemes from top to bottom, now UE1 and UE2 occupy 16 RE jointly, the resource that this 2 UE take can use the CSI-RS of 44 antenna ports position mapping mode to represent.Specific to the configuration of table 1 CSI-RS antenna port number, can be configured to 4, and CSI-RS configurations numbering is configured to by numbering：0,5,4,9, you can indicate the CSI-RS of above-mentioned 44 antenna ports position mapping mode.

With more entering a Walk, if only having used the two UE under the first equipment, now only need to the CSI-RS of corresponding 44 antenna ports of the two UE the 2nd DM-RS RE positions being indicated to the first UE with the CSI-RS of zero energy.

Geng Jin mono- Walk, for UE1 and UE2, because it each occupies 8 RE, as above to described by Fig. 5, the difference of RE numbers according to required for being demodulated the data of each data flow, the first equipment maximum can support the data demodulation of 2 or 4 or 8 or 16 data flows simultaneously.So that RE numbers required for the data demodulation of each data flow are 2 as an example, i.e., maximum to support 8 data flows, now the first equipment maximum can each transmit 4 data flows for UE1 and UE2.

In order to reduce the 2nd DM-RS expense, the 2nd DM-RS RE can be placed on the adjacent PRB of time domain or frequency domain in sparse mode.Figure 11 is resource map when the lower four second user equipment of normal cyclic prefix carries out the MU-MIMO of space division multiplexing in a PRB pair.The connotation that the RE of different patterns is represented in Figure 11 is identical with Fig. 1, and here is omitted.

Specifically, as shown in figure 11, wherein, UE1, UE2, UE3 and UE4 be in the 2nd UE, figure crossbanding represent the RE positions that their the 2nd DM-RS takes.As can be seen that the RE positions that the 2nd DM-RS of aforementioned four UE altogether take are identical with the RE positions that the 2nd DM-RS that Figure 10 UE1 and UE2 are combined takes, i.e., such as Figure 10 from left to right, the 3rd of number schemes from top to bottom.Unlike, Figure 11 is split to two the 2nd UE equivalent to by the resource of the 2nd DM-RS occupancy of each 2nd UE in Figure 10, the UE1 and UE2 that the 2nd DM-RS of the UE1 in Figure 10 resources taken are split into Figure 11, the UE3 and UE4 that the 2nd DM-RS of the UE2 in Figure 10 resources taken are split into Figure 11.So that RE numbers required for the data demodulation of each data flow are 2 as an example, the first equipment maximum can support the data demodulation of 8 data flows simultaneously in Figure 11, due to now there is four UE, each UE the 2nd DM-RS occupies 4 RE, therefore, each UE can transmit the data of 2 data flows.It is, of course, also possible to which each UE in Figure 11 is further continued for split into two UE, method is similar with Figure 11, repeats no more here.

In addition, in order to be protected to each equipment for being MU-MIMO, it is necessary to which the region where the 2nd DM-RS in remaining equipment in addition to oneself carries out rate-matched, as shown in figure 12.Figure 12 is rate-matched figure when the lower four second user equipment of normal cyclic prefix carries out the MU-MIMO of space division multiplexing in a PRB pair.The connotation that the RE of different patterns is represented in Figure 12 is identical with Fig. 1, no longer goes to live in the household of one's in-laws on getting married herein State.

Specifically, aforementioned four the 2nd UE, UE1, UE2, UE3 standing grain Π υ Ε 4, not only need the position of the DM-RS in the first UE to do rate-matched, in addition it is also necessary to do rate-matched in the UE of remaining in addition to oneself the 2nd the 2nd DM-RS position.

From Figure 10 from left to right, the 3rd counted from top to bottom schemes as can be seen that the RE positions that the RE that positive 45 ° are tiltedly rule in figure takes for the first UE DM-RS, the RE of crossbanding is the RE positions of four the 2nd UE the 2nd DM-RS occupancy.Still so that RE numbers required for the data demodulation of each data flow are 2 as an example, so now the 2nd DM-RS is used as demodulated reference signal, the data demodulation of 8 data flows maximum can be supported simultaneously, the data demodulation for 8 data flows that can be supported due to the first UE DM-RS maximums again, therefore, now the first equipment maximum can support the MU-MIMO of 16 data flows transmission simultaneously, be doubled equivalent to by the MU-MIMO of space division multiplexing transmittability.

It can be seen that, 2nd DM-RS use, the influence of any extra signaling and standardization will not be brought to the first UE, first UE carries out the transmission and measurement of downlink data after can still being configured by original agreement, thus when the UE for introducing more MU-MIMO carries out space division multiplexing transmission, complete backward compatibility is realized.Figure 13 is the interaction diagrams of a kind of first equipment that the embodiment of the present invention five is provided and the first user equipment.As shown in figure 13, the transmission method of the demodulated reference signal of the present embodiment, can include rapid with lower Walk to wrap：

The rapid S500 of Walk, the first equipment send the second configured information to the first UE.

Specifically, when the 2nd UE and the first UE multiplexing same running time-frequency resources, the first equipment needs to send the second configured information to the first UE.

With entering a Walk, the second configured information is used for position of the 2nd UE of the instruction demodulated reference signal in Physical Resource Block, so that the first UE carries out rate-matched or interferometry according to position of the 2nd UE demodulated reference signal in Physical Resource Block.Position indicated by the indication signaling, need to only include the position of the demodulated reference signal shared by all 2nd UE.Above-mentioned demodulated reference signal both can be CSI-RS, can also be the first DM-RS or the 2nd DM-RS.

Geng Jin mono- Walk, the second configured information can be by the CSI-RS signaling bears of zero energy. The rapid S501 of Walk, the first UE receive the second configured information that the first equipment is sent.

Executive agent rapid this Walk is the first UE, in practice, and the first UE can be the first UE.Specifically, the first equipment is sent after the second configured information to the first UE, the first UE needs to receive second configured information.

The rapid S502 of Walk, positions of the first UE according to the 2nd UE demodulated reference signal in Physical Resource Block, carry out rate-matched or interferometry.

Executive agent rapid this Walk is the first UE, in practice, and the first UE can be the first UE.Specifically, because the second configured information indicates position of the 2nd UE demodulated reference signal in Physical Resource Block, therefore, the first UE can carry out rate-matched or interferometry according to above-mentioned signaling.In practice, it is specifically to do rate-matched or interferometry in the position, is determined by the first equipment scheduling.Above-mentioned demodulated reference signal both can be CSI-RS, can also be the first DM-RS or the 2nd DM-RS.

Using the scheme of above-described embodiment, by the UE of the first equipment proactive notification the first, allow it to carry out rate-matched or interferometry, realize the backward compatibility to the first UE.Figure 14 is a kind of structural representation for first equipment that the embodiment of the present invention six is provided.As shown in figure 14, first equipment includes：Determining module 10 and sending module 11.

Specifically, determining module 10 is used to determine the position that demodulated reference signal is sent in Physical Resource Block, sending the position of demodulated reference signal includes channel state information reference signals CSI-RS that the first equipment has been used and/or untapped mapping position, and demodulated reference signal is used for the data for demodulating second user equipment；Sending module 11 is used for second user equipment send configuration information, and configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block.

Jin mono- Walk, the position that sending module 11 is additionally operable to send demodulated reference signal in Physical Resource Block sends demodulated reference signal.

Geng Jin mono- Walk, configuration information is the CSI-RS signalings of non-zero power.

Geng Jin mono- Walk, CSI-RS mapping position is are used for the location sets for placing CSI-RS all resource element RE in the Physical Resource Block defined in Long Term Evolution LTE system version Rel-10.

Geng Jin mono- Walk, determining module 10 specifically for：According to the channel condition information of second user equipment, it is determined that sending the position of demodulated reference signal in Physical Resource Block.

Geng Jin mono- Walk, sending module 11 is additionally operable to：Precoding, which is sent, to second user equipment indicates that precoding indicates the precoding information of the user data for indicating second user equipment, so that second user is set It is standby that user data demodulation is carried out according to demodulated reference signal and precoding information, demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent in Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

Geng Jin mono- Walk, precoding indicates it is that the first equipment is sent by Downlink Control Information DCI or radio resource control RRC signaling.

Geng Jin mono- Walk, sending module 11 is additionally operable to：The first configured information is sent to second user equipment, the first configured information is used to indicate that second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block.

Geng Jin mono- Walk, the CSI-RS signaling bears that the first configured information passes through zero energy.

Geng Jin mono- Walk, if Physical Resource Block includes sending DM-RS position at least one first user equipment, the position that the first configured information is indicated includes the position that DM-RS is sent at least one first user equipment.

Geng Jin mono- Walk, if demodulated reference signal is used for the data for demodulating two or more second user equipment, the position that the first configured information is indicated is included in the position that the demodulated reference signal of other second user equipment in addition to second user equipment in two or more second user equipment is sent on Physical Resource Block.

Geng Jin mono- Walk, sending module 11 is additionally operable to：The second configured information is sent at least one first user equipment, second configured information is used for the position for indicating that second user equipment sends demodulated reference signal, so that the position that at least one first user equipment sends demodulated reference signal according to second user equipment carries out rate-matched or interferometry.

Geng Jin mono- Walk, the CSI-RS signaling bears that the second configured information passes through zero energy.

Geng Jin mono- Walk, sending module 11 is additionally operable to：The 3rd indication signaling is sent to base station, the 3rd indication signaling is used for the position for indicating that second user equipment sends demodulated reference signal, so that the position that second user equipment sends demodulated reference signal is reserved in base station.

Geng Jin mono- Walk, determining module 10 is additionally operable to：The Physical Resource Block of transmission demodulated reference signal is determined on the corresponding full bandwidth of the first equipment, or, determine to send the Physical Resource Block of demodulated reference signal on the dedicated bandwidth of second user equipment.

The transmission method of the demodulated reference signal of above-described embodiment, determined to send the position of demodulated reference signal in Physical Resource Block by the first equipment, the position of the transmission demodulated reference signal includes what the first equipment had been used, or it is untapped, or used plus untapped CSI-RS mapping position, and to the Two UE send configurations information are to indicate position of the demodulated reference signal in above-mentioned Physical Resource Block, so that the 2nd UE can carry out data demodulation according to the demodulated reference signal of reception.Due to the position transmission demodulated reference signal of the above-mentioned transmission demodulated reference signal of the first equipment, it therefore, it can support the data demodulation of more users.Figure 15 is a kind of structural representation for first equipment that the present embodiment seven is provided.As shown in figure 15, first equipment includes：Determining module 10, sending module 11 and coding module 20.Above-mentioned determining module 10 and sending module 11 are identical with above-described embodiment six, will not be repeated here.

Specifically, coding module 20 is used to carry out precoding to demodulated reference signal, demodulated reference signal is particularly for the 2nd DM-RS for performing user data demodulation, and the 2nd DM-RS is that the DM-RS sent in Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

The transmission method of the demodulated reference signal of above-described embodiment, determined to send the position of demodulated reference signal in Physical Resource Block by the first equipment, the position of the transmission demodulated reference signal includes what the first equipment had been used, or it is untapped, or the mapping position for adding untapped CSI-RS used, and to the 2nd UE send configurations information to indicate position of the demodulated reference signal in above-mentioned Physical Resource Block, so that the 2nd UE can carry out data demodulation according to the demodulated reference signal of reception.Due to the position transmission demodulated reference signal of the above-mentioned transmission demodulated reference signal of the first equipment, it therefore, it can support the data demodulation of more users.Figure 16 is a kind of structural representation for second equipment that the present embodiment eight is provided.As shown in figure 16, second equipment includes：Receiving module 30 and determining module 31.

Specifically, receiving module 30 is used to receive the configuration information that the first equipment is sent, configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block；Determining module 31 is used to determine position of the demodulated reference signal in Physical Resource Block according to the configuration information that receiving module 30 is received；Receiving module 30 is additionally operable to receive the demodulated reference signal of the first equipment transmission on position in Physical Resource Block in the demodulated reference signal that determining module 31 is determined, position of the demodulated reference signal that determining module 31 is determined in Physical Resource Block includes CSI-RS that the first equipment has been used and/or untapped mapping position, and demodulated reference signal is used for the data for demodulating second user equipment.

Jin mono- Walk, configuration information is the CSI-RS signalings of non-zero power.

Geng Jin mono- Walk, CSI-RS mapping position is fixed in Long Term Evolution LTE system version Rel-10 It is used for the location sets for placing CSI-RS all resource element RE in the Physical Resource Block of justice.

Geng Jin mono- Walk, receiving module 30 is additionally operable to：The precoding for receiving the transmission of the first equipment is indicated；Indicated according to precoding, obtain the precoding information of the user data of second user equipment；Wherein, demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent in Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

Geng Jin mono- Walk, receiving module 30 is additionally operable to：The first configured information of the first equipment transmission is received, the first configured information is used to indicate that second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block；Position in the Physical Resource Block indicated according to the first configured information, carries out rate-matched or interferometry.

The transmission method of the demodulated reference signal of above-described embodiment, receives demodulated reference signal, so as to carry out data demodulation according to above-mentioned demodulated reference signal by the 2nd UE according on the configuration information position that configuration information is indicated in Physical Resource Block.Because the 2nd UE demodulated reference signal has been used in the first equipment, or it is untapped, or in the mapping position for adding untapped CSI-RS used, it is thereby achieved that the data demodulation of more users.Figure 17 is a kind of structural representation for second equipment that the present embodiment nine is provided.As shown in figure 17, second equipment includes：Receiving module 30, determining module 31 and demodulation module 41.Above-mentioned receiving module 30 and determining module 31 are identical with above-described embodiment eight, will not be repeated here.

Specifically, demodulation module 41 is used to carry out user data demodulation according to demodulated reference signal and precoding information；Wherein, demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent in Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

The transmission method of the demodulated reference signal of above-described embodiment, receives demodulated reference signal, so as to carry out data demodulation according to above-mentioned demodulated reference signal by the 2nd UE according on the configuration information position that configuration information is indicated in Physical Resource Block.Because the 2nd UE demodulated reference signal has been used in the first equipment, or it is untapped, or in the mapping position for adding untapped CSI-RS used, it is thereby achieved that the data demodulation of more users. Figure 18 is a kind of structural representation for first equipment that the present embodiment ten is provided.As shown in figure 18, first equipment includes：Processor 50 and transmitter 51.

Specifically, processor 50 is used to determine the position that demodulated reference signal is sent in Physical Resource Block, sending the position of demodulated reference signal includes channel state information reference signals CSI-RS that the first equipment has been used and/or untapped mapping position, and demodulated reference signal is used for the data for demodulating second user equipment；Transmitter 51 is used for second user equipment send configuration information, and configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block；The position that transmitter 51 is additionally operable to send demodulated reference signal in Physical Resource Block sends demodulated reference signal.

Geng Jin mono- Walk, processor 50 specifically for：According to the channel condition information of second user equipment, it is determined that sending the position of demodulated reference signal in Physical Resource Block.

Geng Jin mono- Walk, transmitter 51 is additionally operable to：Precoding is sent to second user equipment to indicate, precoding indicates the precoding information of the user data for indicating second user equipment, so that second user equipment carries out user data demodulation according to demodulated reference signal and precoding information, demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent in Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

Geng Jin mono- Walk, processor 50 is additionally operable to：Precoding is carried out to demodulated reference signal, demodulated reference signal is particularly for the 2nd DM-RS for performing user data demodulation, and the 2nd DM-RS is that the DM-RS sent in Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

Geng Jin mono- Walk, transmitter 51 is additionally operable to：The first configured information is sent to second user equipment, the first configured information is used to indicate that second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block.

Geng Jin mono- Walk, if Physical Resource Block includes sending DM-RS position at least one first user equipment, the position that the first configured information is indicated includes sending at least one first user equipment DM-RS position.

Geng Jin mono- Walk, transmitter 51 is additionally operable to：The second configured information is sent at least one first user equipment, second configured information is used for the position for indicating that second user equipment sends demodulated reference signal, so that the position that at least one first user equipment sends demodulated reference signal according to second user equipment carries out rate-matched or interferometry.

Geng Jin mono- Walk, transmitter 51 is additionally operable to：The 3rd indication signaling is sent to base station, the 3rd indication signaling is used for the position for indicating that second user equipment sends demodulated reference signal, so that the position that second user equipment sends demodulated reference signal is reserved in base station.

Geng Jin mono- Walk, processor 50 is additionally operable to：The Physical Resource Block of transmission demodulated reference signal is determined on the corresponding full bandwidth of the first equipment, or, determine to send the Physical Resource Block of demodulated reference signal on the dedicated bandwidth of second user equipment.

The transmission method of the demodulated reference signal of above-described embodiment, determined to send the position of demodulated reference signal in Physical Resource Block by the first equipment, the position of the transmission demodulated reference signal includes what the first equipment had been used, or it is untapped, or the mapping position for adding untapped CSI-RS used, and to the 2nd UE send configurations information to indicate position of the demodulated reference signal in above-mentioned Physical Resource Block, so that the 2nd UE can carry out data demodulation according to the demodulated reference signal of reception.Due to the position transmission demodulated reference signal of the above-mentioned transmission demodulated reference signal of the first equipment, it therefore, it can support the data demodulation of more users.Figure 19 is a kind of structural representation for second equipment that the present embodiment 11 is provided.As shown in figure 19, second equipment includes：Receiver 60 and processor 61.

Specifically, receiver 60 is used to receive the configuration information that the first equipment is sent, configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block；Jin mono- Walk, processor 61 is used to determine position of the demodulated reference signal in Physical Resource Block according to the configuration information that receiver 60 is received；Receiver 60 is additionally operable to receive the demodulated reference signal of the first equipment transmission on position in Physical Resource Block in the demodulated reference signal that processor 61 is determined, the demodulated reference signal that processor 61 is determined is in Physical Resource Block Position includes CSI-RS that the first equipment has been used and/or untapped mapping position, and demodulated reference signal is used for the data for demodulating second user equipment.

Geng Jin mono- Walk, receiver 60 is additionally operable to：The precoding for receiving the transmission of the first equipment is indicated；Indicated according to precoding, obtain the precoding information of the user data of second user equipment；Processor 61 is additionally operable to carry out user data demodulation according to demodulated reference signal and precoding information；Wherein, demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent in Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

With more entering a Walk, demodulated reference signal is the 2nd DM-RS that user data demodulation is performed by being used for after precoding, and the 2nd DM-RS is that the DM-RS sent in Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

Geng Jin mono- Walk, receiver 60 is additionally operable to：The first configured information of the first equipment transmission is received, the first configured information is used to indicate that second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block；Position in the Physical Resource Block indicated according to the first configured information, carries out rate-matched or interferometry.

The transmission method of the demodulated reference signal of above-described embodiment, receives demodulated reference signal, so as to carry out data demodulation according to above-mentioned demodulated reference signal by the 2nd UE according on the configuration information position that configuration information is indicated in Physical Resource Block.Because the 2nd UE demodulated reference signal has been used in the first equipment, or it is untapped, or in the mapping position for adding untapped CSI-RS used, it is thereby achieved that the data demodulation of more users.

One of ordinary skill in the art will appreciate that：Realize that above-mentioned each method embodiment full portions or Bu Fen Walk can be completed by the related hardware of programmed instruction suddenly.Foregoing program can be stored in a computer read/write memory medium.Upon execution, it is rapid that execution includes above-mentioned each method embodiment Walk to the program；And foregoing storage medium includes：ROM, RAM, magnetic disc or CD etc. are various can be with store program codes Medium.

Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although the present invention is described in detail with reference to foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part or all technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the scope of various embodiments of the present invention technical scheme.

Claims

Claims

1st, a kind of transmission method of demodulated reference signal, it is characterised in that including：

First equipment determines to send the position of demodulated reference signal in Physical Resource Block, the position for sending demodulated reference signal includes channel state information reference signals CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment；

First equipment is to the second user equipment send configuration information, and the configuration information is used to indicate position of the demodulated reference signal in the Physical Resource Block；

The position that first equipment sends demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal.

2nd, the method according to claim 1, it is characterised in that the configuration information is the CSI-RS signalings of non-zero power.

3rd, method according to claim 1 or 2, characterized in that, the mapping position of the CSI-RS be Long Term Evolution LTE system version Rel-10 defined in the Physical Resource Block in be used for place the CSI-RS all resource element RE location sets.

4th, the method according to claim any one of 1-3, it is characterised in that first equipment is determined to send the position of demodulated reference signal in Physical Resource Block, specifically included：

First equipment is according to the channel condition information of the second user equipment, it is determined that sending the position of demodulated reference signal in the Physical Resource Block.

5th, the method according to claim any one of 1-4, it is characterised in that first equipment sends the m of the position transmission demodulated reference signal of demodulated reference signal described in the Physical Resource Block, in addition to：

First equipment sends precoding to the second user equipment and indicated, the precoding indicates the precoding information of the user data for indicating the second user equipment, so that the second user equipment carries out user data demodulation according to the demodulated reference signal and the precoding information, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or the first downlink demodulation reference signal DM-RS for performing user data demodulation, first DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to CSI-RS mapping mode.

6th, the method according to claim 5, it is characterised in that the precoding indicates it is that first equipment is sent by Downlink Control Information DCI or radio resource control RRC signaling. 7th, the method according to claim any one of 1-4, it is characterised in that first equipment sends the m of the position transmission demodulated reference signal of demodulated reference signal described in the Physical Resource Block, in addition to：

First equipment carries out precoding to the demodulated reference signal, the demodulated reference signal is particularly for the 2nd DM-RS for performing user data demodulation, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

8th, the method according to claim any one of 1-7, it is characterised in that before the position that first equipment sends demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal, in addition to：

First equipment sends the first configured information to the second user equipment, and first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block.

9th, the method according to claim 8, it is characterised in that the CSI-RS signaling bears that first configured information passes through zero energy.

10th, method according to claim 8 or claim 9, it is characterized in that, if the Physical Resource Block includes sending DM-RS position at least one first user equipment, the position that first configured information is indicated includes the position that DM-RS is sent at least one described first user equipment.

11st, the method according to claim any one of 8-10, it is characterized in that, if the demodulated reference signal is used for the data for demodulating two or more second user equipment, the position that first configured information is indicated is included in the position that the demodulated reference signal of other second user equipment in addition to the second user equipment in described two above second user equipment is sent on the Physical Resource Block.

12nd, the method according to claim any one of 1-11, it is characterised in that before the position that first equipment sends demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal, in addition to：

First equipment sends the second configured information at least one described first user equipment, second configured information is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that at least one described first user equipment sends demodulated reference signal according to the second user equipment carries out rate-matched or interferometry.

13rd, method according to claim 12, it is characterised in that second configured information passes through The CSI-RS signaling bears of zero energy.

14th, the method according to claim any one of 1-13, it is characterised in that after first equipment sends the position transmission demodulated reference signal of demodulated reference signal described in the Physical Resource Block, in addition to：

First equipment sends the 3rd indication signaling to base station, 3rd indication signaling is used for the position for indicating that the second user equipment sends demodulated reference signal, so that position of the demodulated reference signal of the second user equipment in the Physical Resource Block is reserved in the base station.

15th, the method according to claim any one of 1-14, it is characterised in that first equipment is sent described in the Physical Resource Block before the position transmission demodulated reference signal of demodulated reference signal, in addition to：

First equipment determines to send the Physical Resource Block of the demodulated reference signal on the corresponding full bandwidth of first equipment, or, determine to send the Physical Resource Block of the demodulated reference signal on the dedicated bandwidth of the second user equipment.

16th, a kind of transmission method of demodulated reference signal, it is characterised in that including：

Second user equipment receives the configuration information that the first equipment is sent, and the configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block；

The demodulated reference signal that first equipment is sent is received on the position that second user equipment configuration information described in the Physical Resource Block is indicated, the position that the configuration information is indicated includes CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment.

17th, method according to claim 16, it is characterised in that the configuration information is the CSI-RS signalings of non-zero power.

18th, the method according to claim 16 or 17, characterized in that, the mapping position of the CSI-RS be Long Term Evolution LTE system version Rel-10 defined in the Physical Resource Block in be used for place the CSI-RS all resource element RE location sets.

19th, the method according to claim any one of 16-18, it is characterized in that, before the demodulated reference signal that the first equipment transmission is received on the position that second user equipment configuration information described in the Physical Resource Block is indicated, in addition to：

The second user equipment receives the precoding instruction that first equipment is sent；

The second user equipment is indicated according to the precoding, obtains the user of the second user equipment The precoding information of data；

After the demodulated reference signal that the first equipment transmission is received on the position that second user equipment configuration information described in the Physical Resource Block is indicated, in addition to：

The second user equipment carries out user data demodulation according to the demodulated reference signal and the precoding information；

Wherein, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

20th, method according to claim 19, it is characterised in that the precoding indicates it is that first equipment is sent by Downlink Control Information DCI or radio resource control RRC signaling.

21st, the method according to claim any one of 16-18, it is characterized in that, the demodulated reference signal is the 2nd DM-RS that user data demodulation is performed by being used for after precoding, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

22nd, the method according to claim any one of 16-21, it is characterized in that, before the demodulated reference signal that the first equipment transmission is received on the position that second user equipment configuration information described in the Physical Resource Block is indicated, in addition to：

The second user equipment receives the first configured information that first equipment is sent, and first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block；

Position in the Physical Resource Block that the second user equipment is indicated according to first configured information, carries out rate-matched or interferometry.

23rd, method according to claim 22, it is characterised in that the CSI-RS signaling bears that first configured information passes through zero energy.

24th, a kind of first equipment, it is characterised in that including：

Determining module, position for determining the transmission demodulated reference signal in Physical Resource Block, the position for sending demodulated reference signal includes channel state information reference signals CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment； Sending module, for the second user equipment send configuration information, the configuration information to be used to indicate position of the demodulated reference signal in the Physical Resource Block；

The position that the sending module is additionally operable to send demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal.

25th, the first equipment according to claim 24, it is characterised in that the configuration information is the CSI-RS signalings of non-zero power.

26th, the first equipment according to claim 24 or 25, characterized in that, the mapping position of the CSI-RS be Long Term Evolution LTE system version Rel-10 defined in the Physical Resource Block in be used for place the CSI-RS all resource element RE location sets.

27th, the first equipment according to claim any one of 24-26, it is characterised in that the determining module specifically for：

According to the channel condition information of the second user equipment, it is determined that sending the position of demodulated reference signal in the Physical Resource Block.

28th, the first equipment according to claim any one of 24-27, it is characterised in that the sending module is additionally operable to：

Precoding is sent to the second user equipment to indicate, the precoding indicates the precoding information of the user data for indicating the second user equipment, so that the second user equipment carries out user data demodulation according to the demodulated reference signal and the precoding information, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or the first downlink demodulation reference signal DM-RS for performing user data demodulation, first DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to CSI-RS mapping mode.

29th, the first equipment according to claim 28, it is characterised in that the precoding indicates it is that first equipment is sent by Downlink Control Information DCI or radio resource control RRC signaling.

30th, the first equipment according to claim any one of 24-27, it is characterised in that first equipment also includes：

Coding module, for carrying out precoding to the demodulated reference signal, the demodulated reference signal is particularly for the 2nd DM-RS for performing user data demodulation, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

31st, the first equipment according to claim any one of 24-30, it is characterised in that the hair Module is sent to be additionally operable to：

The first configured information is sent to the second user equipment, first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block.

32nd, the first equipment according to claim 31, it is characterised in that the CSI-RS signaling bears that first configured information passes through zero energy.

33rd, the first equipment according to claim 31 or 32, it is characterized in that, if the Physical Resource Block includes sending DM-RS position at least one first user equipment, the position that first configured information is indicated includes the position that DM-RS is sent at least one described first user equipment.

34th, the first equipment according to claim any one of 31-33, it is characterized in that, if the demodulated reference signal is used for the data for demodulating two or more second user equipment, the position that first configured information is indicated is included in the position that the demodulated reference signal of other second user equipment in addition to the second user equipment in described two above second user equipment is sent on the Physical Resource Block.

35th, the first equipment according to claim any one of 24-34, it is characterised in that the sending module is additionally operable to：

The second configured information is sent at least one described first user equipment, second configured information is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that at least one described first user equipment sends demodulated reference signal according to the second user equipment carries out rate-matched or dry

, 36, the first equipment according to claim 35, it is characterised in that the CSI-RS signaling bears that second configured information passes through zero energy.

37th, the first equipment according to claim any one of 27-36, it is characterised in that the sending module is additionally operable to：

The 3rd indication signaling is sent to base station, the 3rd indication signaling is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that the second user equipment sends demodulated reference signal is reserved in the base station.

38th, the first equipment according to claim any one of 24-37, it is characterised in that the determining module is additionally operable to：

The Physical Resource Block of the transmission demodulated reference signal is determined on the corresponding full bandwidth of first equipment, or, determine to send the Physical Resource Block of the demodulated reference signal on the dedicated bandwidth of the second user equipment. 39th, a kind of second user equipment, it is characterised in that including：

Receiving module, for receiving the configuration information that the first equipment is sent, the configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block；

Determining module, the configuration information for being received according to the receiving module determines position of the demodulated reference signal in the Physical Resource Block；

The receiving module is additionally operable to receive the demodulated reference signal that first equipment is sent on position in the Physical Resource Block in the demodulated reference signal that the determining module is determined, position of the demodulated reference signal that the determining module is determined in the Physical Resource Block includes CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment.

40th, the second user equipment according to claim 39, it is characterised in that the configuration information is the CSI-RS signalings of non-zero power.

41st, the second user equipment according to claim 39 or 40, characterized in that, the mapping position of the CSI-RS be Long Term Evolution LTE system version Rel-10 defined in the Physical Resource Block in be used for place the CSI-RS all resource element RE location sets.

42nd, the second user equipment according to claim any one of 39-41, it is characterised in that the receiving module is additionally operable to：

Receive the precoding instruction that first equipment is sent；

Indicated according to the precoding, obtain the precoding information of the user data of the second user equipment；

The second user equipment also includes：

Demodulation module, for carrying out user data demodulation according to the demodulated reference signal and the precoding information；

Wherein, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

43rd, second user equipment according to claim 42, it is characterised in that the precoding indicates it is that first equipment is sent by Downlink Control Information DCI or radio resource control RRC signaling. 44th, the second user equipment according to claim any one of 39-41, it is characterized in that, the demodulated reference signal is the 2nd DM-RS that user data demodulation is performed by being used for after precoding, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

45th, the second user equipment according to claim any one of 39-44, it is characterised in that the receiving module is additionally operable to：

The first configured information that first equipment is sent is received, first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block；

Position in the Physical Resource Block indicated according to first configured information, carries out rate-matched or interferometry.

46th, the second user equipment according to claim 45, it is characterised in that the CSI-RS signaling bears that first configured information passes through zero energy.

47th, a kind of first equipment, it is characterised in that including：

Processor, position for determining the transmission demodulated reference signal in Physical Resource Block, the position for sending demodulated reference signal includes channel state information reference signals CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment；

Transmitter, for the second user equipment send configuration information, the configuration information to be used to indicate position of the demodulated reference signal in the Physical Resource Block；

The position that the transmitter is additionally operable to send demodulated reference signal described in the Physical Resource Block sends the demodulated reference signal.

48th, the first equipment according to claim 47, it is characterised in that the configuration information is the CSI-RS signalings of non-zero power.

49th, the first equipment according to claim 47 or 48, characterized in that, the mapping position of the CSI-RS be Long Term Evolution LTE system version Rel-10 defined in the Physical Resource Block in be used for place the CSI-RS all resource element RE location sets.

50th, the first equipment according to claim any one of 47-49, it is characterised in that the processor specifically for：

According to the channel condition information of the second user equipment, it is determined that sending the position of demodulated reference signal in the Physical Resource Block. 51st, the first equipment according to claim any one of 47-50, it is characterised in that the transmitter is additionally operable to：

Precoding is sent to the second user equipment to indicate, the precoding indicates the precoding information of the user data for indicating the second user equipment, so that the second user equipment carries out user data demodulation according to the demodulated reference signal and the precoding information, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or the first downlink demodulation reference signal DM-RS for performing user data demodulation, first DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to CSI-RS mapping mode.

52nd, the first equipment according to claim 51, it is characterised in that the precoding indicates it is that first equipment is sent by Downlink Control Information DCI or radio resource control RRC signaling.

53rd, the first equipment according to claim any one of 47-50, it is characterised in that the processor is additionally operable to：

Precoding is carried out to the demodulated reference signal, the demodulated reference signal is particularly for the 2nd DM-RS for performing user data demodulation, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

54th, the first equipment according to claim any one of 47-53, it is characterised in that the transmitter is additionally operable to：

The first configured information is sent to the second user equipment, first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block.

55th, the first equipment according to claim 54, it is characterised in that the CSI-RS signaling bears that first configured information passes through zero energy.

56th, the first equipment according to claim 54 or 55, it is characterized in that, if the Physical Resource Block includes sending DM-RS position at least one first user equipment, the position that first configured information is indicated includes the position that DM-RS is sent at least one described first user equipment.

57th, the first equipment according to claim any one of 54-56, it is characterized in that, if the demodulated reference signal is used for the data for demodulating two or more second user equipment, the position that first configured information is indicated is included in the position that the demodulated reference signal of other second user equipment in addition to the second user equipment in described two above second user equipment is sent on the Physical Resource Block.

58th, the first equipment according to claim any one of 47-57, it is characterised in that the transmitter is additionally operable to： The second configured information is sent at least one described first user equipment, second configured information is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that at least one described first user equipment sends demodulated reference signal according to the second user equipment carries out rate-matched or does 59, the first equipment according to claim 58, characterized in that, the CSI-RS signaling bears that second configured information passes through zero energy.

60th, the first equipment according to claim any one of 50-59, it is characterised in that the transmitter is additionally operable to：

The 3rd indication signaling is sent to base station, the 3rd indication signaling is used for the position for indicating that the second user equipment sends demodulated reference signal, so that the position that the second user equipment sends demodulated reference signal is reserved in the base station.

61st, the first equipment according to claim any one of 47-60, it is characterised in that the processor is additionally operable to：

The Physical Resource Block of the transmission demodulated reference signal is determined on the corresponding full bandwidth of first equipment, or, determine to send the Physical Resource Block of the demodulated reference signal on the dedicated bandwidth of the second user equipment.

62nd, a kind of second user equipment, it is characterised in that including：

Receiver, for receiving the configuration information that the first equipment is sent, the configuration information is used to indicate position of the demodulated reference signal in Physical Resource Block；

Processor, the configuration information for being received according to the receiver determines position of the demodulated reference signal in the Physical Resource Block；

The receiver is additionally operable to receive the demodulated reference signal that first equipment is sent on position in the Physical Resource Block in the demodulated reference signal that the processor is determined, position of the demodulated reference signal that the processor is determined in the Physical Resource Block includes CSI-RS that first equipment has been used and/or untapped mapping position, and the demodulated reference signal is used for the data for demodulating the second user equipment.

63rd, second user equipment according to claim 62, it is characterised in that the configuration information is the CSI-RS signalings of non-zero power.

64th, the second user equipment according to claim 62 or 63, it is characterised in that the mapping position of the CSI-RS is the physical resource defined in Long Term Evolution LTE system version Rel-10 It is used for the location sets for placing all resource element RE of the CSI-RS in block.

65th, the second user equipment according to claim any one of 62-64, it is characterised in that the receiver is additionally operable to：

Receive the precoding instruction that first equipment is sent；

Indicated according to the precoding, obtain the precoding information of the user data of the second user equipment；

The processor is additionally operable to carry out user data demodulation according to the demodulated reference signal and the precoding information；

Wherein, the demodulated reference signal includes the CSI-RS for performing channel measurement operation or is to be mapped in the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal according to CSI-RS mapping mode for the first the downlink demodulation reference signal DM-RS, the first DM-RS for performing user data demodulation.

66th, the second user equipment according to claim 65, it is characterised in that the precoding indicates it is that first equipment is sent by Downlink Control Information DCI or radio resource control RRC signaling.

67th, the second user equipment according to claim any one of 62-64, it is characterized in that, the demodulated reference signal is the 2nd DM-RS that user data demodulation is performed by being used for after precoding, and the 2nd DM-RS is that the DM-RS sent described in the Physical Resource Block on the position of demodulated reference signal is mapped according to default mapping mode.

68th, the second user equipment according to claim any one of 62-67, it is characterised in that the receiver is additionally operable to：

The first configured information that first equipment is sent is received, first configured information is used to indicate that the second user equipment carries out the position of rate-matched or interferometry in Physical Resource Block；

Position in the Physical Resource Block indicated according to first configured information, carries out rate-matched or interferometry.

69th, the second user equipment according to claim 68, it is characterised in that the CSI-RS signaling bears that first configured information passes through zero energy.