CN107046431B

CN107046431B - Information transmission and receiving method and device

Info

Publication number: CN107046431B
Application number: CN201610082890.4A
Authority: CN
Inventors: 肖华华; 陈艺戬; 李儒岳; 鲁照华; 吴昊; 蔡剑兴; 王瑜新; 李永
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-02-05
Filing date: 2016-02-05
Publication date: 2021-09-03
Anticipated expiration: 2036-02-05
Also published as: WO2017133688A1; CN107046431A

Abstract

The invention provides a method and a device for transmitting and receiving information, wherein the method for transmitting the information comprises the following steps: dividing M demodulation reference signal DMRS ports into K DMRS port groups, wherein K, M is a positive integer and K is less than or equal to M; DMRS is transmitted using separate precoding on each DMRS port group. According to the invention, the M DMRS ports are divided into K DMRS port groups, and the DMRS is transmitted on each DMRS port group by using independent precoding, so that the technical problem of low channel estimation performance of the DMRS in the same PRB pair caused by using the same precoding is solved, and the effect of improving the performance of the DMRS estimation channel is further achieved.

Description

Information transmission and receiving method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting and receiving information.

Background

In a wireless communication system, a transmitting end and a receiving end generally use multiple antennas to transmit and receive to obtain a higher rate. One principle of the multiple-input-multiple-output (MIMO) technology is to utilize some characteristics of a channel to form a multi-layer transmission matching the characteristics of the channel, so that a significant performance improvement can be obtained without increasing bandwidth and power, and the MIMO technology is widely applied to current systems. For example, in a Long Term Evolution (Long Term Evolution, abbreviated as LTE) system and an enhanced version thereof (Long Term Evolution-Advanced, abbreviated as LTE a), there are multiple modes of multi-antenna technology transmission, a transmission mode 2 is space-frequency diversity, a transmission mode 3 is open-loop spatial multiplexing or is referred to as open-loop MIMO technology, a transmission mode 4 is closed-loop spatial multiplexing, a transmission mode 5 is multi-user MIMO, a transmission mode 6 is closed-loop spatial multiplexing of a single data stream,

transmission modes

7 and 8 are single-stream and dual-stream beam forming, respectively, and a transmission mode 9 supports spatial multiplexing of a maximum 8 layers, and can realize adaptive switching of data layers when users and multiple users are adaptively switched, and support open-loop MIMO and closed-loop MIMO modes.

Among these transmission modes, some require a user to feed back a Precoding Matrix Indicator (PMI) and are called closed-loop MIMO techniques, and some do not require a PMI to be fed back and are called open-loop MIMO techniques. These transmission modes are defined in LTE/LTE a mainly to adapt to the channel characteristics of different users and the reception capabilities of the users. For example, for a user with 1 receiving antenna, the MIMO technology with 1 multiplexing layer number can only be used, and a user with a fast channel change can consider using the open-loop MIMO technology, because when the user moves at a fast speed, the channel changes fast, and in a feedback period, precoding information fed back by closed-loop spatial multiplexing cannot accurately and timely reflect downlink channel information in the next feedback period of the base station, thereby causing performance degradation. The open-loop spatial multiplexing technology has better robustness because precoding information does not need to be fed back.

Early versions of LTE/LTE a, such as Release 8/Release 9, used open-loop MIMO based on Cell-specific Reference Signal (CRS), which was implemented using TM3, and demodulation was mainly considered using CRS. Since CRS supports 4 ports at maximum, TM3 does not support the case of more than 4 ports.

As more and more transmission ports are configured for a base station, an open-loop MIMO technology supporting more ports also needs to be supported, and in release10 and later versions of LTE/LTE a, a transmission mode 9 and a transmission mode 10 are defined, which can perform open-loop MIMO based on a Demodulation Reference Signal (DMRS). In open-loop MIMO based on DMRS, since a terminal does not feed back precoding information, a base station does not have prior information to determine precoding matched with downlink to transmit data, so that performance is degraded due to inaccurate precoding, and particularly in open-loop precoding based on multiple PRB granularities, once selected precoding is not good, transmission failure of a whole data Block is easily caused. The REG is a set of resource elements REs including N OFDM/OFDMA symbols and corresponding to M subcarriers, the REs in the set of resource elements are in the same PRB pair, and the REs in the REG may be continuous or discrete.

In the related art, the DMRS only uses the same precoding function in the same PRB pair, and in release 10-release 13 versions of LTE/LTE A, the DMRS support at most 8 ports, namely ports {7, 8, 9, 10, 10, 11, 12, 13, 14 }. Each port holds 12 Resource Elements (REs) respectively.

Since the DMRSs in the same PRB pair use the same precoding, and K different REGs are divided in a data transmission or enhanced Downlink Control Channel (ePDCCH) region, precoding used by each REG may be different, which may cause that a Channel estimated by the DMRSs may not well reflect a Channel for transmitting data or an ePDCCH REG, thereby causing performance degradation.

For the technical problem of low channel estimation performance caused by the fact that DMRSs in the same PRB pair use the same precoding in the related art, no solution is proposed at present.

Disclosure of Invention

The invention provides an information transmission and receiving method and device, which at least solve the technical problem of low channel estimation performance caused by the fact that DMRSs in the same PRB pair use the same precoding in the related technology.

According to an aspect of the present invention, there is provided a method for transmitting information, including: dividing M demodulation reference signal DMRS ports into K DMRS port groups, wherein K and M are positive integers, and K is less than or equal to M; and transmitting the DMRS on each DMRS port group by using independent precoding.

Optionally, before dividing the M DMRS ports into the K DMRS port groups, further comprising: determining the M, the K, and a channel rank N, wherein N is a positive integer.

Optionally, determining the M, the K, and a channel rank N comprises: determining the K according to the N and the M; or determining the N according to the K and the M; or determining the M according to the K and the N; wherein K N is less than or equal to M.

Optionally, when N-1 or N-2, M-N-K.

Optionally, each DMRS port in the group of DMRS ports comprises 12 resource elements, REs.

Optionally, the value of K is determined by the number of REGs divided by REs used for transmitting information on the PRB pair where the M DMRS ports are located.

Optionally, the method further comprises: dividing REs used for transmitting information on a PRB pair where the M DMRS ports are located into K REGs, and transmitting information on the K REGs by using independent precoding.

Optionally, the information transmitted in each REG includes: data and/or control channel information.

Optionally, each of the K DMRS port groups and each of the K REGs corresponding to the each DMRS port group use the same precoding.

Optionally, the channel rank N comprises at least one of: the number of data transmission layers, the number of data transmission streams, the number of data layers, channel Rank, the number of control channel transmission layers, the number of control channel transmission streams, the number of control channel layers, the number of transmission streams, the number of layers, and the number of precoding columns.

According to another aspect of the present invention, there is provided a method for receiving information, including: receiving DMRSs of M demodulation reference signal DMRS ports, and dividing the M demodulation reference signal DMRS ports into K DMRS port groups; and carrying out channel estimation and/or information demodulation independently by using the DMRS on each DMRS port group, wherein M and K are positive integers, and K is less than or equal to M.

Optionally, prior to dividing the M DMRS ports into the K DMRS port groups, the method further comprises: determining the M, the K, and a received channel rank N, wherein N is a positive integer.

Optionally, determining the M, the K, and the received channel rank N comprises: determining the K according to the N and the M; or determining the N according to the K and the M; or determining the M according to the K and the N; wherein K N is less than or equal to M.

Optionally, when N-1 or N-2, M-N-K.

Optionally, the demodulating, by using the received DMRS on each of the DMRS port groups, information transmitted on REGs corresponding to the DMRS port groups respectively includes: independently estimating a channel for the received DMRS on each DMRS port group; and demodulating information transmitted on the REG corresponding to the DMRS port group by using the estimated channel.

Optionally, the value of K is determined by the number of resource element groups REG divided by REs used for transmitting information on the PRB pair where the M DMRS ports are located.

Optionally, information transmitted on the PRB pair where the M DMRS ports are located is received, and REs used for transmitting the information on the PRB pair where the M DMRS ports are located are divided into K REGs.

Optionally, the information transmitted in the REG includes: data and/or control channel information.

Optionally, the information demodulation with DMRS on each of the DMRS port groups independently comprises: and each of the K DMRS port groups demodulates the information of the REG corresponding to each DMRS port group in the K REGs.

According to another aspect of the present invention, there is also provided an information transmission method, including: determining the number K of first REGs and the number P of second REGs in a physical resource block PRB pair, wherein the K and the P are positive integers, and the K is more than or equal to the P; first information is transmitted in K of the first REGs and second information is transmitted in P of the second REGs.

Optionally, the first information includes: data and/or control channel information, the second information comprising: and pilot information.

Optionally, before transmitting first information in K of the first REGs and second information in P of the second REGs, the method further comprises: dividing the physical resource block PRB into the K first REGs and/or the P second REGs.

Optionally, the first REG is a resource element RE group in the PRB pair used for transmitting the first information, and the second REG is a resource element RE group in the PRB pair used for transmitting the second information.

Optionally, the ith second REG R_iComprising r_iA RE and L_iThe r is commonly used by all DMRS ports_iRE, wherein i, r_iAnd L_iIs a positive integer, and i is more than or equal to 1 and less than or equal to P.

Optionally, said L_iL, wherein said L is represented byRank N is determined, L, N and i are positive integers and 1 ≦ i ≦ P.

Optionally, when N is 1 or 2, L is 2; when N is greater than 2, L ═ N.

Optionally, the first number K of REGs, the second number P of REGs, and the number L of DMRS ports of each second REG satisfy a relationship K × N ═ P × L.

Optionally, when N is 1, K is 2P, wherein when P is 1, K is 2; and when the N is greater than 1, K is P.

Optionally, the ith second REG R_iNumber of contained REs r_iR, where r is determined by the channel rank N, and r and i are positive integers, 1 ≦ i ≦ P.

Optionally, when N is 1 or 2, R is R/P, where R is a total number of REs in the PRB pair for transmitting the DMRS, and R is a positive integer; when the N is more than 2, the r is 12/P.

Optionally, when N is 1 and the total number of REs used for transmitting DMRSs in the PRB pair is 12, values of the number K of the first REGs, the number P of the second REGs, and the number r of REs included in the second REGs include the following combinations: k-2, P-1, r-12, or K-4, P-2, r-6, or K-6, P-3, r-4, or K-8, P-4, r-3, or K-12, P-6, r-2; alternatively, the first and second electrodes may be,

when N is 2 and the total number of REs used for transmitting DMRSs in the PRB pair is 12, values of the number K of the first REG, the number P of the second REG, and the number r of REs included in the second REG, which is 12/P, include the following combinations: k-2, P-2, r-6, or K-3, P-3, r-4, or K-4, P-4, r-3, or K-6, P-6, r-2; alternatively, the first and second electrodes may be,

when N is 1 and the total number of REs used for transmitting DMRSs in the PRB pair is 24, values of the number K of the first REG, the number P of the second REG, and the number r of REs included in the second REG, which is 24/P, include the following combinations: k-4, P-2, r-12, or K-8, P-4, r-6, or K-12, P-6, r-4, or K-16, P-8, r-3, or K-24, P-12, r-2; alternatively, the first and second electrodes may be,

when N is 2 and the total number of REs used for transmitting DMRSs in the PRB pair is 24, values of the number K of the first REG, the number P of the second REG, and the number r of REs included in the second REG, which is 24/P, include the following combinations: k-4, P-4, r-6, or K-6, P-6, r-4, or K-8, P-8, r-3, or K-12, P-12, r-2; alternatively, the first and second electrodes may be,

when N is 3 or 4, and the total number of REs used for transmitting DMRSs in the PRB pair is 24, values of the number K of the first REGs, the number P of the second REGs, and the number r of REs included in the second REGs, which is 12/P, include the following combinations: k-2, P-2, r-6, or K-3, P-3, r-4, or K-4, P-4, r-3, or K-6, P-6, r-2; alternatively, the first and second electrodes may be,

when the N is greater than 4, and the total number of REs used for transmitting the DMRS in the PRB pair is 24, values of the number K of the first REG, the number P of the second REG, and the number r of REs included in the second REG, which is 12/P, include the following combinations: k is 3, P is 3, r is 4.

According to another aspect of the present invention, there is also provided a method for receiving information, including: receiving first information transmitted by K first REGs and second information transmitted by P second REGs of a physical resource block PRB pair, wherein K and P are positive integers, and K is more than or equal to P; and independently performing channel estimation on the second information on the P second REGs, and performing information demodulation on the first information on the K first REGs.

Optionally, demodulating the first information corresponding to the second information by independently using the second information, respectively, includes: independently estimating channels by using the second information respectively; and respectively estimating the channels of the corresponding K first REGs by using the estimated channels, and demodulating the data information of the first information.

According to an aspect of the present invention, there is provided an information transmission apparatus including: the device comprises a first division module, a second division module and a third division module, wherein the first division module is used for dividing M demodulation reference signal DMRS ports into K DMRS port groups, and K and M are positive integers; a first transmission module configured to transmit the DMRS using independent precoding on each of the DMRS port groups.

According to another aspect of the present invention, there is provided an information receiving apparatus including: the device comprises a first division module, a second division module and a third division module, wherein the first division module is used for receiving DMRS (demodulation reference signals) of M DMRS ports and dividing the M DMRS ports into K DMRS port groups; and the first demodulation module is used for independently carrying out channel estimation and/or information demodulation by using the DMRS on each DMRS port group, M and K are positive integers, and K is less than or equal to M.

According to another aspect of the present invention, there is provided an apparatus for transmitting information, comprising: the device comprises a determining module, a determining module and a judging module, wherein the determining module is used for determining the number K of first REGs and the number P of second REGs in a physical resource block PRB pair, wherein the K and the P are positive integers, and the K is more than or equal to the P; a second transmission module to transmit first information in the K first REGs and to transmit second information in the P second REGs.

According to another aspect of the present invention, there is provided an information receiving apparatus including: a receiving module, configured to receive first information transmitted by K first REGs and second information transmitted by P second REGs of a physical resource block PRB pair, where K and P are positive integers, and K is greater than or equal to P; and a second demodulation module, configured to perform channel estimation on the second information on the P second REGs independently, and perform information demodulation on the first information on the K first REGs.

According to the invention, M demodulation reference signal DMRS ports are divided into K DMRS port groups, wherein K, M is a positive integer and K is less than or equal to M; the method for transmitting the DMRS by using the independent precoding on each DMRS port group divides M DMRS ports into K DMRS port groups, and transmits the DMRS by using the independent precoding on each DMRS port group, solves the technical problem of low channel estimation performance of the DMRS in the same PRB pair caused by using the same precoding, and further achieves the effect of improving the performance of the DMRS estimation channel.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a first flowchart of a method for transmitting information according to an embodiment of the present invention;

fig. 2 is a first flowchart of a method for receiving information according to an embodiment of the present invention;

FIG. 3 is a flow chart II of a method for transmitting information according to an embodiment of the present invention;

fig. 4 is a second flowchart of a method of receiving information according to an embodiment of the present invention;

fig. 5 is a block diagram one of the structures of an information transmission apparatus according to an embodiment of the present invention;

fig. 6 is a block diagram one of the structures of an apparatus for receiving information according to an embodiment of the present invention;

FIG. 7 is a block diagram of a second embodiment of an apparatus for transmitting information;

fig. 8 is a block diagram of a second configuration of an information receiving apparatus according to an embodiment of the present invention;

fig. 9 is a schematic diagram of a frame structure with 12 DMRSs according to an embodiment of the present invention;

fig. 10 is a schematic diagram of a frame structure with 24 DMRSs according to an embodiment of the present invention;

fig. 11 is a schematic diagram of a division of the first REG into 2, 3, 4, 6 shares according to an alternative embodiment of the present invention;

fig. 12 is a schematic diagram of the second REG being divided into 2, 3, 4, 6 parts, R-12 according to an alternative embodiment of the present invention;

fig. 13 is a schematic diagram of the second REG divided into 2, 3, 4, 6 parts, R-24 according to an alternative embodiment of the present invention;

fig. 14 is a schematic diagram of the second REG divided into 4, 6, 8, 12, R-24 according to an alternative embodiment of the present invention;

fig. 15 is a first mapping relationship of a second REG and a first REG according to an alternative embodiment of the present invention;

fig. 16 is a second correspondence of the second REG and the first REG according to an alternative embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In this embodiment, an information transmission method is provided, and fig. 1 is a first flowchart of an information transmission method according to an embodiment of the present invention, as shown in fig. 1, the flow includes the following steps:

step S102, dividing M DMRS ports into K DMRS port groups, wherein K, M is a positive integer, and K is less than or equal to M;

and step S104, transmitting the DMRS on each DMRS port group by using independent precoding.

Through the steps, the sending end divides the M DMRS ports into the K DMRS port groups, and transmits the DMRS on each DMRS port group by using independent precoding, so that the technical problem of low channel estimation performance of the DMRS in the same PRB pair caused by the same precoding is solved, and the effect of improving the performance of the DMRS estimation channel is achieved.

In an optional embodiment, before step S102, the method may further include: the sender determines M, K and the channel rank N, where N is a positive integer.

In practice, K may be determined from N, M; alternatively, N may be determined from K, M; alternatively, M may be determined from K, N; wherein K N is less than or equal to M.

For example, the transmitting end determines the number K of REGs according to the channel rank N and the number M of DMRS ports, and divides the M DMRS ports P1, P2, …, PM into K DMRS port groups S1, S2, …, SK, where each DMRS port group uses an independent precoded transmission demodulation reference pilot signal DMRS for demodulating information transmitted on the REGs corresponding to the port group. Wherein K, M and N are positive integers, and K × N < ═ M.

Or, the transmitting end determines the channel rank as N according to the number K of REGs and the number M of DMRS ports, and divides the M DMRS ports P1, P2, …, PM into K DMRS port groups S1, S2, …, SK, where each DMRS port group uses an independent precoding transmission demodulation reference pilot signal DMRS for demodulating information transmitted on the REGs corresponding to the port group. Wherein K, M and N are positive integers, and K × N < ═ M.

Or, the transmitting end determines the number M of DMRS ports to be configured according to the number K of REGs and the channel rank N, and divides the M DMRS ports P1, P2, …, and PM into K DMRS port groups S1, S2, …, and SK, where each DMRS port group uses an independent precoded transmission demodulation reference pilot signal DMRS for demodulating information transmitted on the REGs corresponding to the port group, where K, M, and N are positive integers, and K ═ N <, M.

In an alternative embodiment, when the number of data layers transmitted or the channel rank N-1 or N-2, M-N-K.

Wherein, each DMRS port P1, P2, …, PM in the DMRS port group may include 12 resource elements, REs.

The value of K may be determined by the number of REGs divided by REs used for transmitting information on the PRB pair where the M DMRS ports are located.

Before or after step S102, the method may further include: dividing REs used for transmitting information on a PRB pair where M DMRS ports are located into K REGs, and transmitting the information on the K REGs by using independent precoding.

Wherein the information may include: data and/or control channel information.

Wherein each of the K DMRS port groups and the REG corresponding to each DMRS port group in the K REGs may use the same precoding.

Wherein the channel rank N may comprise at least one of: the number of data transmission layers, the number of data transmission streams, the number of data layers, channel Rank, the number of control channel transmission layers, the number of control channel transmission streams, the number of control channel layers, the number of transmission streams, the number of layers, and the number of precoding columns.

In this embodiment, an information receiving method is provided, and fig. 2 is a first flowchart of an information receiving method according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:

step S202, receiving DMRS of M demodulation reference signal DMRS ports, and dividing the M demodulation reference signal DMRS ports into K DMRS port groups;

and step S204, channel estimation and/or information demodulation is independently carried out by using the DMRS on each DMRS port group, M and K are positive integers, and K is less than or equal to M.

Through the steps, the received M DMRS ports are divided into K DMRS port groups, and the DMRS on each DMRS port group is utilized to independently carry out channel estimation and/or information demodulation, wherein M and K are positive integers, and K is less than or equal to M, so that the technical problem of low channel estimation performance of the DMRS in the same PRB pair caused by the same precoding is solved, and the effect of improving the channel estimation performance of the DMRS at the receiving end is further achieved.

Before the step S202, the method may further include: a determination M, K is made, and the received channel rank N, where N is a positive integer.

For example, the receiving end may determine the number K of REGs according to the received channel rank N information and the received M DMRS port information, divide the M DMRS ports P1, P2, …, PM into K DMRS port groups S1, S2, …, SK, independently perform channel estimation on the received DMRS reference pilot signal DMRS of each DMRS port group, and detect information transmitted on the REGs corresponding to the port group using the channel estimated by the port group. Wherein K, M and N are positive integers, and K × N < ═ M.

Or, the receiving end may determine the channel rank as N according to the number K of REGs and the received information of the M DMRS ports, divide the M DMRS ports P1, P2, …, and PM into K DMRS port groups S1, S2, …, and SK, independently perform channel estimation on the DMRS for each received DMRS port demodulation reference pilot signal, and detect information transmitted on the REGs corresponding to the port group using the channel estimated by the port group. Wherein K, M and N are positive integers, and K × N < ═ M.

Or, the receiving end may determine the received M DMRS port information according to the number K of REGs and the channel rank being N, and divide the M DMRS ports P1, P2, …, PM into K DMRS port groups S1, S2, …, SK, perform channel estimation independently on each received DMRS port demodulation reference pilot signal DMRS, and detect information transmitted on the REGs corresponding to the port group using the channel estimated by the port group. Wherein K, M and N are positive integers, and K × N < ═ M.

In an alternative embodiment, when the channel rank N is 1 or N is 2, M is N K.

In an optional embodiment, the value of K is determined by the number of resource element groups REG divided by REs used for transmitting information on the PRB pair where the M DMRS ports are located.

For example, the value of K may be equal to the number of REGs divided over the transmission resource on which the M DMRS ports are located.

In an optional embodiment, before step S204, the method may further include: and receiving information transmitted on the PRB pairs where the M DMRS ports are located, and dividing REs used for transmitting the information on the PRB pairs where the M DMRS ports are located into K REGs.

Wherein the information transmitted on the REG may include: data and/or control channel information.

In an optional embodiment, the independently demodulating information with DMRS on each of the DMRS port groups in step S204 may include: and each of the K DMRS port groups demodulates the information of the REG corresponding to the DMRS port group in the K REGs.

In this embodiment, an information transmission method is further provided, and fig. 3 is a second flowchart of the information transmission method according to the embodiment of the present invention, as shown in fig. 3, the process includes the following steps:

step S302, determining the number K of first REGs and the number P of second REGs in a PRB pair, wherein K, P is a positive integer and K is more than or equal to P;

step S304, first information is transmitted in K first REGs, and second information is transmitted in P second REGs.

Through the steps, P second REGs are used for transmitting second information in one PRB pair, namely, the PRB pair can contain P second information and K first information, so that the technical problem of low channel estimation performance of the DMRS in the same PRB pair caused by the same precoding is solved, and the effect of improving the channel estimation performance of the DMRS at the receiving end is further achieved.

Wherein the first information may include: data and/or control channel information, the second information may include: and pilot information.

In an alternative embodiment, step S304 may be implemented by a method including: first information is transmitted with independent precoding in the K first REGs, respectively, and second information is transmitted with independent precoding in the P second REGs, respectively. In this optional embodiment, information is transmitted in the K first REGs and the P second REGs respectively by using independent precoding, which further improves the performance of open-loop MIMO.

In an optional embodiment, before step S304, the method may further include: the physical resource block PRB is divided into K first REGs and/or P second REGs.

The first REG is a resource element RE group in the PRB pair for transmitting the first information, and the second REG is a resource element RE group in the PRB pair for transmitting the second information.

Wherein the ith second REG R_iMay include r_iA RE and L_iThe r is commonly used by all DMRS ports_iRE, wherein i, r_iAnd L_iIs a positive integer, and i is more than or equal to 1 and less than or equal to P.

In an alternative embodiment, L_iL, where L is determined by the channel rank N, L, N and i are positive integers and 1 ≦ i ≦ P.

In an alternative embodiment, when the channel rank N is 1 or 2, L is 2; when N is greater than 2, L ═ N.

Wherein, the number K of the first REGs, the number P of the second REGs and the number L of the DMRS ports of each second REG satisfy the relationship: k × N ═ P × L.

In an alternative embodiment, K is 2P when N is 1, wherein K is 2 when P is 1; and when N is greater than 1, K is P.

Wherein the ith second REG R_iNumber of contained REs r_iR, where r is determined by the channel rank N, and r and i are positive integers, 1 ≦ i ≦ P.

In an alternative embodiment, when N is 1 or 2, R is R/P, where R is the total number of REs in a PRB pair transmitting the DMRS, and R is a positive integer; when N is larger than 2, r is 12/P.

For example, when N is 1 and the total number of REs used for transmitting the DMRS in the PRB pair is 12, the values of the number K of the first REGs, the number P of the second REGs, and the number r of REs included in the second REGs include the following combinations: k-2, P-1, r-12, or K-4, P-2, r-6, or K-6, P-3, r-4, or K-8, P-4, r-3, or K-12, P-6, r-2;

for another example, when N is 2 and the total number of REs used for transmitting the DMRS in the PRB pair is 12, values of the number K of the first REGs, the number P of the second REGs, and the number r of REs included in the second REGs, which is 12/P, include the following combinations: k-2, P-2, r-6, or K-3, P-3, r-4, or K-4, P-4, r-3, or K-6, P-6, r-2;

for another example, when N is 1 and the total number of REs used for transmitting the DMRS in the PRB pair is 24, values of the number K of the first REGs, the number P of the second REGs, and the number r of REs included in the second REGs, which is 24/P, include the following combinations: k-4, P-2, r-12, or K-8, P-4, r-6, or K-12, P-6, r-4, or K-16, P-8, r-3, or K-24, P-12, r-2;

for another example, when N is 2 and the total number of REs used for transmitting the DMRS in the PRB pair is 24, values of the number K of the first REGs, the number P of the second REGs, and the number r of REs included in the second REGs, which is 24/P, include the following combinations: k-4, P-4, r-6, or K-6, P-6, r-4, or K-8, P-8, r-3, or K-12, P-12, r-2;

for another example, when N is 3 or 4, and the total number of REs used for transmitting the DMRS in the PRB pair is 24, values of the number K of first REGs, the number P of second REGs, and the number r of REs included in the second REGs, which is 12/P, include the following combinations: k-2, P-2, r-6, or K-3, P-3, r-4, or K-4, P-4, r-3, or K-6, P-6, r-2;

for another example, when N >4 and the total number of REs used for transmitting the DMRS in the PRB pair is 24, values of the number K of the first REGs, the number P of the second REGs, and the number r of REs included in the second REGs, which is 12/P, include the following combinations: k is 3, P is 3, r is 4.

In this embodiment, an information receiving method is further provided, and fig. 4 is a second flowchart of the information receiving method according to the embodiment of the present invention, as shown in fig. 4, the flowchart includes the following steps:

step S402, receiving first information transmitted by K first REGs and second information transmitted by P second REGs of a physical resource block PRB pair, wherein K and P are positive integers, and K is greater than or equal to P;

step S404, perform channel estimation on the second information on the P second REGs independently, and perform information demodulation on the first information on the K first REGs.

Through the steps, the second information transmitted by the P second REGs and the K first information are received in the PRB pair, namely the PRB can comprise the K first information and the P second information, so that the technical problem of low channel estimation performance of the DMRS in the same PRB pair caused by the same precoding is solved, and the effect of improving the channel estimation performance of the DMRS at the receiving end is further achieved.

In an alternative embodiment, step S404 may include: the receiving end independently estimates the channel by using the second information respectively; and then, respectively estimating channels of the corresponding K first REGs by using the estimated channels, and demodulating the information of the first information.

For example, the receiving end may receive first information transmitted by K first REGs D1, …, DK and second information transmitted by P second REGs R1, …, RP from the same PRB pair of the same transmitting end, estimate a channel using the second information transmitted by the P second REGs R1, …, RP, estimate a channel using the estimated channel for the K first REGs, and perform data detection on the first information transmitted by the first REGs. Wherein K and P are positive integers, and K is greater than or equal to P.

Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

In this embodiment, an information transmitting and receiving apparatus is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and the description of the apparatus is omitted for brevity. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.

Fig. 5 is a block diagram showing a first configuration of an information transmission apparatus according to an embodiment of the present invention, and as shown in fig. 5, the apparatus includes a first division module 52 and a first transmission module 54, which will be described below.

A first dividing module 52, configured to divide the M DMRS ports into K DMRS port groups, K, M being a positive integer, where K is less than or equal to M; a first transmission module 54 connected to the first division module 52 for transmitting the DMRS on each DMRS port group using independent precoding.

Fig. 6 is a block diagram showing a first structure of an information receiving apparatus according to an embodiment of the present invention, and as shown in fig. 6, the apparatus includes a second dividing module 62 and a first demodulating module 64, which will be described below.

A second dividing module 62, configured to receive DMRSs of the M demodulation reference signal DMRS ports, and divide the M demodulation reference signal DMRS ports into K DMRS port groups; and a first demodulation module 64 connected to the second division module 62 and configured to perform channel estimation and/or information demodulation independently using DMRSs on each DMRS port group, where M and K are positive integers, and K is equal to or less than M.

Fig. 7 is a block diagram of a second structure of an information transmission apparatus according to an embodiment of the present invention, which includes a determination module 72 and a second transmission module 74, as shown in fig. 7, and is explained below.

A determining module 72, configured to determine a number K of first REGs and a number P of second REGs in a physical resource block PRB pair, where K, P is a positive integer and K is greater than or equal to P; a second transmission module 74, connected to the determination module 72, is configured to transmit the first information in the K first REGs and the second information in the P second REGs.

Fig. 8 is a block diagram of a second structure of an information receiving apparatus according to an embodiment of the present invention, which includes a receiving module 82 and a second demodulating module 84, as shown in fig. 8, and is described below.

A receiving module 82, configured to receive first information transmitted by K first REGs and second information transmitted by P second REGs of a physical resource block PRB pair, where K and P are positive integers, and K is greater than or equal to P; a second demodulation module 84, connected to the receiving module 82, is configured to perform channel estimation on the second information on the P second REGs independently, and perform information demodulation on the first information on the K first REGs.

The following describes a method and an apparatus for transmitting and receiving information according to an embodiment of the present invention with reference to a specific implementation environment.

In various embodiments of the present invention, the transmitting end in the downlink includes, but is not limited to: various wireless communication devices such as macro base stations, micro base stations, wireless access points, and the like. The receiving end includes but is not limited to: various wireless communication devices such as data cards, mobile phones, notebook computers, personal computers, tablet computers, personal digital assistants, bluetooth and the like. In the uplink, the transmitting end includes but is not limited to: various wireless communication devices such as data cards, mobile phones, notebook computers, personal computers, tablet computers, personal digital assistants, bluetooth and the like. The receiving end includes but is not limited to: various wireless communication devices such as macro base stations, micro base stations, wireless access points, and the like.

The channel rank N may comprise at least one of: the number of data transmission layers, the number of data transmission streams, the number of data layers, channel Rank, the number of control channel transmission layers, the number of control channel transmission streams, the number of control channel layers, the number of transmission streams, the number of layers, and the number of precoding columns. For convenience of description and reduction of duplicate description, the transmitting end, the receiving end and some concepts, scenarios and configuration methods used in embodiments 1 to 3 are described as follows:

in a system comprising at least one transmitting end and at least one receiving end, the transmitting end uses Nb PRB pairs to transmit data or ePDCCH and pilot frequency information for one user served by the transmitting end. Each PRB pair is a set S of resource elements REs comprising Nc subcarriers and Ns OFDM/OFDMA symbols, which includes Nc × Ns REs. Dividing all REs of each PRB transmission data or ePDCCH into K REGs, wherein K is a positive integer larger than 1, each REG group comprises a plurality of REs in the same PRB, and the REs in different REG groups are not repeated. In this embodiment, the transmitting end uses the open-loop MIMO form of transmission mode 9 or transmission mode 10, and the K REGs are transmitted to the user using independent precoding. The sending end divides M ports of demodulation reference pilot frequency into K groups, independent precoding is configured respectively and sent to the receiving end, and a user receives reference pilot frequency signals of the M DMRS ports, divides the M ports into the K groups and carries out channel estimation respectively. Here, one DMRS group is associated with one REG group, and it is assumed without loss of generality that the kth group of DMRS ports is associated with the kth group of REGs, that is, the user performs channel estimation on the kth group of DMRS ports, obtains channel estimation of the kth REG region using the estimated channel, and performs data detection, demodulation, decoding, and the like on the kth REG.

Based on the above description, we will present some alternative embodiments of the invention, as described in examples 1-3.

Embodiment 1 determining the number of port groups K according to the channel rank N and the number of ports M

For the sending end:

the sending end obtains K REGs which need to be divided into in a PRB according to the channel rank N and the number M of DMRS ports allocated to the receiving end, wherein K is determined by a method of K being M/N. And dividing the REs in each PRB pair into K REGs G1, G2, … and GK, wherein each group comprises M1, M2, … and MK REs, and one RE in the same PRB belongs to one REG group only.

The transmitting end simultaneously divides M DMRS ports P1, P2, … and PM into K DMRS port groups S1, S2, … and SK. Precoding the kth DMRS port group Sk and the kth REG group Gk respectively by using precoding Ci, and transmitting the k DMRS port group Sk and the kth REG group Gk to a user C_iAnd a precoding matrix of Nt × N, where K is 1, …, K. Where K, M and N are positive integers and K N<＝M。

And the receiving end determines the number K of REGs by using N and M according to the received channel rank N information and the received information of M DMRS ports, wherein one determination method is that K is M/N. And dividing M DMRS ports P1, P2, … and PM into K DMRS port groups S1, S2, … and SK, independently performing channel estimation on the received demodulation reference pilot signals DMRS of the kth DMRS port group, and performing data detection for the kth REG by using the estimated channel. Wherein K, M and N are positive integers, and K × N < ═ M.

Taking the frame structure of LTE/LTE a as an example, values of various parameters are actually illustrated, for example, in a DMRS frame structure with only 12 REs, as shown in fig. 9, M takes a value of 2, port7 and port8 share 12 DMRS REs by means of Orthogonal Cover Codes (OCC), and if the number of transmitted data layers is 1, K is 2 REG groups, and the DMRSs are also divided into two groups. port7 and REG1 use precoding C1, and port8 and REG2 use precoding C2. The receiving end receives DMRS signals of 2 ports port7 and port8, estimates channels by using the DMRS signals, estimates a channel of REG1 by using the channel estimated by port7, and performs data detection, estimates a channel of REG2 by using the channel estimated by port8, and performs data detection, wherein C1 and C2 are precoding matrixes of Nt 1.

In a DMRS frame structure with only 24 REs, as shown in fig. 10, M takes a value of 4, and the corresponding ports are port7 and port8, and port9 and port10, where port7 and port8 share 12 DMRS REs in an OCC manner, port9 and port10 share 12 DMRS REs in an OCC manner, and discussion is performed according to the size of N in two cases

When the channel rank N is 1, K is 4 REG groups, the DMRS is also 4 groups, port7 to port10 use precoding C1 to C4, respectively, and REG1 to REG4 use precoding C1 to C4, respectively. The receiving end receives ports port7 to port10 and uses it to perform channel estimation to obtain the channels of REG1 to REG4, and uses the estimated channels to perform data detection on REG, wherein C1 to C4 are precoding matrices of Nt 1.

When the channel rank N is 2, K is 2 REG groups, the DMRS is also divided into 2 groups, port7 and port8 use precoding C1, port9 and port10 use precoding C2, and REG1 and REG2 use precoding C1 and C2, respectively. And the receiving end receives the DMRS signals of the M ports and estimates the channel by using the DMRS signals. Estimating channels of the data layers 1 and 2 of the REG1 by using a port7 and a port8 respectively, and performing data detection; the estimated

REG2 data layer

1 and 2 channels are estimated with port9 and port10, respectively, and data detection is performed, where C1 and C2 are precoding matrices of Nt × 2.

The port numbers of port7 to port10 are only one of the embodiments, and other port numbers, such as port1 to port 4, may be used, and the operation steps are similar, which are not illustrated here.

Here, data is transmitted in the REG, and enhanced downlink control channel ePDCCH information may also be transmitted, and the process and flow thereof are the same as the manner of transmitting data, so long as the transmission data is changed to ePDCCH. This will not be repeated here.

Embodiment 2 determining channel rank N according to the number K of REGs and the number M of ports

For the sending end:

and the transmitting end determines a channel rank N according to the number K of REGs and the number M of DMRS ports allocated to the receiving end, wherein one method for determining N is N-M/K, and the REs in each PRB pair are divided into K REGs G1, G2, … and GK, each group comprises M1, M2, … and MK REs, and one RE in the same PRB belongs to and only belongs to one REG group.

The transmitting end simultaneously divides M DMRS ports P1, P2, … and PM into K DMRS port groups S1, S2, … and SK. Using precoding C_iPrecoding the kth DMRS port group Sk and the kth REG group Gk respectively, and transmitting to the user C_iAnd a precoding matrix of Nt × N, where K is 1, …, K. Where K, M and N are positive integers and K N<＝M。

And the receiving end determines the channel rank N according to the number K of REGs and the received information of M DMRS ports, wherein one method for determining N is N-M/K. And dividing M DMRS ports P1, P2, … and PM into K DMRS port groups S1, S2, … and SK, independently performing channel estimation on the received demodulation reference pilot signals DMRS of the kth DMRS port group, and performing data detection for the kth REG by using the estimated channel. Wherein K, M and N are positive integers, and K × N < ═ M.

Taking the frame structure of LTE/LTE a as an example, values of various parameters are actually illustrated, for example, in a DMRS frame structure with only 12 REs, as shown in fig. 9, M takes a value of 2, port7 and port8 share 12 DMRS REs by means of Orthogonal Cover Codes (OCC), and are divided into 2 REG groups, where K is K, and DMRS is also divided into two groups, and the number of data layers to be transmitted is 1. port7 and REG1 use precoding C1, and port8 and REG2 use precoding C2. The receiving end receives DMRS signals of 2 ports port7 and port8, estimates channels by using the DMRS signals, estimates a channel of REG1 by using the channel estimated by port7, and performs data detection, estimates a channel of REG2 by using the channel estimated by port8, and performs data detection, wherein C1 and C2 are precoding matrixes of Nt 1.

In a DMRS frame structure with only 24 REs, as shown in fig. 10, M takes a value of 4, and the corresponding ports are port7 and port8, and port9 and port10, where port7 and port8 share 12 DMRS REs in an OCC manner, port9 and port10 share 12 DMRS REs in an OCC manner, and according to the size of N, discussion is performed in two cases:

when K is 4 REG groups and DMRS is also 4 groups, the channel rank N is M/K4/4 is 1, the port7 to the port10 use precoding C1 to C4, and REG1 to REG4 use precoding C1 to C4, respectively. The receiving end receives ports port7 to port10 and uses it to perform channel estimation to obtain the channels of REG1 to REG4, and uses the estimated channels to perform data detection on REG, wherein C1 to C4 are precoding matrices of Nt 1.

When the channel rank N is M/K4/2 is 2, port7 and port8 use precoding C1, port9 and port10 use precoding C2, and REG1 and REG2 use precoding C1 and C2, respectively. And the receiving end receives the DMRS signals of the M ports and estimates the channel by using the DMRS signals. Estimating channels of the data layers 1 and 2 of the REG1 by using a port7 and a port8 respectively, and performing data detection; the estimated

REG2 data layer

Embodiment 3 determining the number of ports M according to the number K of REGs and the channel rank N

For the sending end:

the sending end determines the number M of DMRS ports allocated to the receiving end according to the number K of REGs and the channel rank N, wherein one method for determining M is M-N K, and the REs in each PRB pair are divided into K REGs G1, G2, … and GK, each group comprises M1, M2, … and MK REs, and one RE in the same PRB belongs to and only belongs to one REG group.

And the receiving end receives the number K of the REGs and the channel rank N, determines the number M of the DMRS ports, wherein one determination mode is M-N-K, and receives the information of the M DMRS ports. And dividing M DMRS ports P1, P2, … and PM into K DMRS port groups S1, S2, … and SK, independently performing channel estimation on the received demodulation reference pilot signals DMRS of the kth DMRS port group, and performing data detection for the kth REG by using the estimated channel. Wherein K, M and N are positive integers, and K × N < ═ M.

Taking a frame structure of LTE/LTE a as an example, actually illustrating values of various parameters, for example, in a DMRS frame structure with only 12 REs, a transmitting end needs to divide a PRB into K × 2 REGs, and each REG transmits 1 data stream, as shown in fig. 9, it needs to configure M × N × K × 2 ports for this user, port7 and port8 share 12 DMRS REs by means of OCC, the transmitting end divides the PRB into K × 2 REG groups, the DMRS are also divided into two groups, and the number of transmitted data layers is 1. port7 and REG1 use precoding C1, and port8 and REG2 use precoding C2. The receiving end receives DMRS signals of 2 ports port7 and port8, estimates channels by using the DMRS signals, estimates a channel of REG1 by using the channel estimated by port7, and performs data detection, estimates a channel of REG2 by using the channel estimated by port8, and performs data detection, wherein C1 and C2 are precoding matrixes of Nt 1.

In a DMRS frame structure with only 24 REs, as shown in fig. 10, a sender needs to divide a PRB into 4 REGs, and each REG transmits N1 data streams (channel rank N1), the sender needs to configure M4 ports, and corresponding ports are port7 and port8, port9 and port10, where port7 and port8 share 12 DMRS REs, port9 and port10 by means of OCC, and share 12 DMRS REs by means of OCC. The transmitting end divides the PRB into 4 REG groups, divides the DMRS into 4 groups, and transmits each REG with the data layer number N of 1, and uses precoding C1-C4 for port 7-port 10, and precoding C1-C4 for REG 1-REG 4. The receiving end receives ports port7 to port10 and uses it to perform channel estimation to obtain the channels of REG1 to REG4, and uses the estimated channels to perform data detection on REG, wherein C1 to C4 are precoding matrices of Nt 1.

In a DMRS frame structure with only 24 REs, as shown in fig. 10, a sender needs to divide a PRB into 2 REGs, and each REG transmits N-2 data streams (channel rank N-2), the sender needs to configure M-4 ports, divide into K-2 REG groups, and the DMRS is also divided into 2 groups, and the number of transmitted data layers N-2 (channel rank N-2), then port7 and port8 use precoding C1, port9 and port10 use precoding C2, and REG1 and REG2 use precoding C1 and C2, respectively. And the receiving end receives the DMRS signals of the M ports and estimates the channel by using the DMRS signals. Estimating channels of the data layers 1 and 2 of the REG1 by using a port7 and a port8 respectively, and performing data detection; the estimated

REG2 data layer

For convenience of description and reduction of duplicate description, we describe the transmitting end, the receiving end and some concepts, scenarios and configuration methods used in embodiments 4 to 7 as follows:

in a system including at least one transmitting end and at least one receiving end, the number of antennas/ports/elements configured for each transmitting end is Nt, and the number of antennas/ports/elements configured for the receiving end is Nr, where Nt is a positive integer greater than 1 and Nr is a positive integer greater than 0. The transmitting end uses Nb PRB pairs to transmit data or ePDCCH and pilot signals for one user served by the transmitting end. Each PRB pair is a set S of resource elements REs comprising Nc subcarriers and Ns OFDM/OFDMA symbols, which includes Nc × Ns REs. All REs transmitting data in each PRB pair or ePDCCH are divided into K first REGs D1, …, DK. Wherein K is a positive integer greater than 1, each first REG group comprises a plurality of REs in the same PRB, and REs in different REG groups are not repeated. In this embodiment, the transmitting end uses the open-loop MIMO form of transmission mode 9 or transmission mode 10, and the K first REGs are transmitted to the user after using independent precoding. The transmitting end divides R REs transmitting the demodulation reference pilot into P second REGs R1, …, RP, wherein the ith second REG of the second REGs comprises R_iDMRS RE including L_iThe r is shared by the DMRS ports in an OCC mode_iDMRS RE, i ═ 1, …, P. And the receiving end receives the transmission data or the information on the RE of the ePDCCH and divides the RE of the transmission data or the ePDCCH into K first REG groups like the transmitting end. Receiving end receives R DMRSs in same PRBReference pilot signal on RE, and dividing it into P second REGs like the transmitting end, wherein the ith second REG of the second REGs comprises r_iDMRS RE including L_iThe r is shared by the DMRS ports in an OCC mode_iDMRS RE, i ═ 1, …, P. And carrying out channel estimation independently by using each REG of the P received second REGs or each DMRS port of each REG, carrying out channel estimation on the K first REGs by using the estimated channel, and detecting and demodulating data or ePDCCH transmitted on the first REGs by using the channel estimated by using the REGs.

Based on the above description, we will present some alternative embodiments of the invention, as described in examples 4-7.

Embodiment 4 determining the RE number of the second REG and the spatial partition according to the number K of the first REG and the number P of the second REG

For the sending end:

in order to transmit data to the same receiving end, the transmitting end divides each PRB for transmitting data into K first REGs D1, …, DK, as shown in fig. 3, the first REG is divided into K2, 3, 4, and 6, although there are other similar dividing methods, which are not illustrated here. Each first REG uses independent precoding to transmit data or ePDCCH processing to a receiving end. In order to enable the receiving end to demodulate and detect the data, the transmitting end needs to transmit the DMRSs by using R DMRS REs and divide the R DMRS REs into P second REGs R1, …, RP, where a more specific method for dividing the second REGs is P ═ 1, that is, there is only one second REG, the second REG includes 12 REs, and each REG has 2 DMRS ports. When the rank of the channel or the number of layers N of data transmission is 1, K is 2, i.e., the first REG is divided into two REGs D1 and D2. And precoding the data on the D1 by using precoding P1, transmitting the precoded data to a receiving end, preprocessing the DMRS signal on the first port of the second REG by using P1, and transmitting the preprocessed DMRS signal to the receiving end.

And the receiving end receives the data of the 2 first REGs and the DMRS signals on the 2 DMRS ports, independently performs channel estimation on the received DMRS of the demodulation reference pilot signals of the kth DMRS port group, performs data detection on the kth first REG by using the estimated channel, and k is 1 and 2.

Embodiment 5 determining the RE number of the second REG and the time-frequency port condition according to the number K of the first REG and the number P of the second REG

For the sending end:

in order to transmit data to the same receiving end, the transmitting end divides each PRB for transmitting data into K first REGs D1, …, DK, as A, B, C, D in fig. 11, and divides the first REG into K2, 3, 4, and 6. Each first REG uses independent precoding to transmit data or ePDCCH processing to a receiving end. In order to enable the receiving end to demodulate and detect these data, the transmitting end needs to transmit DMRSs using R DMRS REs, and divide the R DMRS REs into P second REGs R1, …, and RP, as shown in fig. 12 to 14, A, B, C, D in fig. 12 respectively indicates that 12 DMRS REs are P ═ 2, 3, 4, and 6 second REGs, A, B, C, D in fig. 13 respectively indicates that 24 DMRS REs are P ═ 2, 3, 4, and 6 second REGs, and A, B, C, D in fig. 14 respectively indicates that 24 DMRS REs are P ═ 4, 6, 8, and 12 second REGs. And dividing the P second REGs so that a receiving end estimates a channel according to the received DMRS information on the P second REGs to demodulate the data of the K REGs, wherein K and P are positive integers which are more than 1, and K is more than or equal to P. The ith second REG of the second REG comprises r_iDMRS RE including L_iThe r is shared by the DMRS ports in an OCC mode_iDMRS RE, i ═ 1, …, P.

One more specific method for dividing the second REG is P ═ K, i.e., there are K first REGs and K second REGs, each RE group of the second REGs includes equal number of REs, r ═ 12/P, and each REG has L ═ 2 DMRS ports. When the number R of the DMRS REs is 12, the DMRS REs correspond to port7 and port8 of LTE/LTE A, and the two ports areports share the r REs in an OCC manner, and each port uses the r REs of the REG where the port is located, namely, the total P group port7 and the port 8. The ports of the second REG of different groups may also be renumbered, forming P × L ports in total, such as the ith group R_iThe corresponding port numbers are port (2i-1) and port 2i, i being 1, …, P. Or under the condition that the number R of the DMRS REs is 24, the number of the DMRS included in each REG group is 24/P REs when N is less than 3, each REG group has 2 ports, or is LTE/LTE A port7 or port8, the two ports share the R REs in an OCC mode, or is LTE/LTE A port9 or port10, the two ports share the R REs in an OCC mode, each port is only in the RE of the REG where the port is located, and P group port 7/port 8 or port 9/port 10 are always shared; of course, the ports of the P second REGs may also be renumbered, for a total of 2P ports, e.g. the ith group R_iThe corresponding port numbers are port (2i-1) and port 2i, i being 1, …, P. In case N is larger than 2, each second REG has N ports sharing a group of REs, such as when N is 4, port7 and port8 share the RE of r/2 of the REG group by means of OCC, and port9 and port10 share the RE of r/2 of the REG group by means of OCC. Such as at N>At time 4, corresponding to

ports

7, 8, 11, 13 of LTE/LTE a, the 4 ports share the r/2 REs by means of OCC, or

ports

9, 10, 12, 14, the 4 ports share the r/2 REs by means of OCC, the other N please refer to DMRS numbers of LTE/LTE a, and each port only uses the corresponding 12/P REs in REG.

Transmitting end using precoding P_iFor the first REG D of the ith group_iIs transmitted to the user after being precoded, and is transmitted to the user by P_iFor the ith second REG R_iAfter precoding, transmitting the DMRS signal to a receiving end, P_iIs a matrix of Nt x N columns, Nt being the number of transmit antennas/elements/ports. When R ═ 12, where K ═ P includes but is not limited to values of 2, 3, 4, 6, the number of REs per REG corresponds to 12/P. When R is 24 and N is 1, the value K is P including but not limited to 4, 6, 8, 12, corresponding RE number per REG is 12/P, when R is 24 and N is 2, the value K is P including but not limited to 2, 3, 4, 6, corresponding per REGRE number of each REG is 12/P at N>When 4, the value K ═ P includes, but is not limited to, the value K ═ P ═ 3, and the number of REs per REG is 4.

And the receiving end receives the data transmitted by the K first REGs and the DMRS signals transmitted by the K second REGs, estimates a channel of data of a jth layer on the ith first REG by using the DMRS signal on the RE corresponding to the jth port of the ith second REG, and detects the data, wherein i is …, P, j is 1, …, N. When R ═ 12, where K ═ P includes but is not limited to values of 2, 3, 4, 6, the number of REs per REG corresponds to 12/P. When R is 24 and N is 1, where K is P includes but is not limited to values of 4, 6, 8, 12 and the number of REs per REG is 12/P, when R is 24 and N is 2, where K is P includes but is not limited to values of 2, 3, 4, 6 and the number of REs per REG is 12/P, and when N >4, K is P includes but is not limited to values of K is P3 and the number of REs per REG is 4.

The port numbers of port7 to port 14 are only one example, and other port numbers such as port1 to port7 may be used, and the operation steps are similar, but not illustrated here.

Here, the ith second REG corresponds to the demodulation pilot signal of the ith first REG, which is only one of the embodiments, as shown in (a) of fig. 15. There may be other corresponding relations as shown in (a) of fig. 16, where the ith second REG corresponds to the demodulation pilot signal of the P-i +1 th first REG, which is not exemplified here.

Embodiment 6, the number of REs of the second REG and the time-frequency + spatial-domain port are determined according to the number K of the first REG and the number P of the second REG, and only 12 DMRS REs exist in one PRB.

For the sending end:

for a transmitting end to transmit data to the same receiving end, each PRB for transmitting data is divided into K first REG D1, …, DK, e.g.A, B, C, D in fig. 11, the first REG is divided into K2, 3, 4, and 6, but there are other similar dividing methods, which are not limited to this example. Each first REG uses independent precoding to transmit data or ePDCCH processing to a receiving end. In order to enable the receiving end to demodulate and detect these data, the transmitting end needs to transmit DMRSs using R DMRS REs, and divide the R DMRS REs into P second REGs R1, …, and RP, as shown in fig. 12 to 14, A, B, C, D in fig. 12 respectively indicates that 12 DMRS REs are P ═ 2, 3, 4, and 6 second REGs, A, B, C, D in fig. 13 respectively indicates that 24 DMRS REs are P ═ 2, 3, 4, and 6 second REGs, and A, B, C, D in fig. 14 respectively indicates that 24 DMRS REs are P ═ 4, 6, 8, and 12 second REGs. And dividing the P second REGs so that a receiving end estimates a channel according to the received DMRS information on the P second REGs to demodulate the data of the K REGs, wherein K and P are positive integers which are more than 1, and K is more than or equal to P. The ith second REG of the second REG comprises r_iDMRS RE including L_iThe r is shared by the DMRS ports in an OCC mode_iDMRS RE, i ═ 1, …, P.

In this example, K>P, i.e. there are K first REGs and P second REGs, each RE group of the second REGs comprising an equal number of REs, R12/P in case of a DMRS RE number R of 12, each REG having L2 DMRS ports. Corresponding to port7 and port8 of LTE/LTE A, these two ports share r REs in OCC mode, and each port uses r REs of the REG where it is located, i.e. total P group port7 and port 8. The ports of the second REG of different groups may also be renumbered, forming P x 2 ports in total, such as the ith group R_iThe corresponding port numbers are port (2i-1) and port 2i, i being 1, …, P.

When N is 1, the transmitting end uses precoding P_iFor the first REG D of the ith group_iTransmit to the user after precoding the data of (i) 1, …, K, transmit to the receiving end after precoding the DMRS signals on the first and second DMRS ports of the jth second REG Rj with P2j-1 and P2j, respectively, P_iA matrix of Nt x 1 columns,nt is the number of transmit antennas/arrays/ports, i is 1, …, K, j is 1, …, P, where K is 2P, the value of P includes but is not limited to 2, 3, 4, 6, and the number of REs corresponding to each REG is 12/P, that is, includes the following values:

p-2, K-4, L-6, or P-3, K-6, L-4, or P-4, K-8, L-3, or P-6, K-12, L-2.

When N is 2, the transmitting end uses precoding P_iFor the first REG D of the ith group_iIs transmitted to the user after being precoded, and is transmitted to the user by P_iTo the ith second REG R_iThe DMRS signals on the jth DMRS port are precoded and then transmitted to a receiving end, P_iIs a matrix of Nt x 2 columns, and Nt is the number of transmit antennas/elements/ports. Here, the values of i ═ 1, …, P, j ═ 1, 2, and K ═ P, P include but are not limited to the values of 2, 3, 4, 6, and the number of REs per REG is 12/P, that is, the following values are included:

p-2, K-2, L-6, or P-3, K-3, L-4, or P-4, K-4, L-3, or P-6, K-6, L-2.

And the receiving end receives the data transmitted by the K first REGs and the DMRS signals transmitted by the P second REGs. When N is 1, estimating a channel of data on the 2 × i-2+ j first REG by using the DMRS signal on the corresponding RE of the j port of the i second REG, and performing data detection on the channel, where i is 1, …, P, j is 1, 2, K is 2P, the value of P includes but is not limited to values of 2, 3, 4, 6, and the number of REs of each corresponding REG is 12/P. Namely, the following values are included:

p-2, K-4, L-6, or P-3, K-6, L-4, or P-4, K-8, L-3, or P-6, K-12, L-2.

And when N is 2, estimating a channel of the jth data on the ith first REG by using the DMRS signal on the corresponding RE of the jth port of the ith second REG, and performing data detection on the channel, where i is 1, …, K, j is 1, 2, ceil is an upper integer function, K is P, the value of P includes but is not limited to 2, 3, 4, 6, and the number of REs of each corresponding REG is 12/P. Namely, the following values are included:

p-2, K-2, L-6, or P-3, K-3, L-4, or P-4, K-4, L-3, or P-6, K-6, L-2.

Here, the correspondence relationship between the ith group REG of the first REG and the jth group REG of the second REG may be arbitrary, and is not limited to the correspondence relationship of the present embodiment, and as shown in fig. 15 and 16, (a) in fig. 15 is K ═ P and the ith second REG group R_iCorresponding to the ith first REG_iAnd so on. FIG. 15 (B) shows the ith second REG group R_iCorresponds to the 2i-1 st first REG D2i-1 and the 2i-1 st first REG D2i, respectively, and provides channel estimation and demodulation thereto. In fig. 16, (a) is K ═ P and the ith second REG group R_iDK-i +1 corresponds to the K-i +1 th first REG, and provides it with channel estimation and data demodulation. In fig. 16, (B) the first and second ports of the P-i +1 th second REG group RP-i +1 correspond to the K-2i-1 th first REG D2i-1 and the 2i-1 th first REG D2i, respectively, and provide channel estimation and data demodulation thereto.

Embodiment 7, determining the number of REs of the second REG according to the number K of the first REG and the number P of the second REG, under the condition of time-frequency + space-domain port division, only 24 DMRS REs are available in one PRB

For the sending end:

in order to transmit data to the same receiving end, the transmitting end divides each PRB for transmitting data into K first REGs D1, …, DK, as A, B, C, D in fig. 11, and divides the first REG into K2, 3, 4, and 6. Each first REG uses independent precoding to process data or ePDCCH and then transmits the processed data or ePDCCH to a receiving end. In order to enable the receiving end to demodulate and detect these data, the transmitting end needs to transmit DMRSs using R DMRS REs, and divide the R DMRS REs into P second REGs R1, …, and RP, as shown in fig. 12 to 14, A, B, C, D in fig. 12 respectively indicates that 12 DMRS REs are P ═ 2, 3, 4, and 6 second REGs, A, B, C, D in fig. 13 respectively indicates that 24 DMRS REs are P ═ 2, 3, 4, and 6 second REGs, and A, B, C, D in fig. 14 respectively indicates that 24 DMRS REs are P ═ 4, 6, 8, and 12 second REGs. And dividing the P second REGs so that a receiving end estimates a channel according to the received DMRS information on the P second REGs to demodulate the data of the K REGs, wherein K and P are positive integers which are more than 1, and K is more than or equal to P. The ith second REG of the second REG comprises r_iDMRS RE including L_iThe r is shared by the DMRS ports in an OCC mode_iDMRS RE, i ═ 1, …, P.

In this example, K>When the number of DMRS REs is 24 and when N is less than 3, each RE group of the second REG includes 24/P REs, each REG group has 2 ports, which are either LTE/LTE a port7 or port8, and share the R REs by means of OCC, or are LTE/LTE a port9 or port10, and share the R REs by means of OCC, and each port is only in the REs of the REG where the port is located, and the total number of the P groups is port 7/port 8 or port 9/port 10; of course, the ports of the P second REGs may also be renumbered, for a total of 2P ports, e.g. the ith group R_iThe corresponding port numbers are port (2i-1) and port 2i, i being 1, …, P. In case N is larger than 2, each second REG has N ports sharing a group of REs, such as when N is 4, port7 and port8 share the RE of r/2 of the REG group by means of OCC, and port9 and port10 share the RE of r/2 of the REG group by means of OCC. Such as at N>At time 4, corresponding to

ports

7, 8, 11, 13 of LTE/LTE a, these 4 ports share the r/2 REs by OCC, or

ports

9, 10, 12, 14, these 4 ports share the r/2 REs by OCC, and other N please refer to LDMRS number of TE/LTE a, and each port uses only the corresponding 12/P REs within REG.

When N is 1, the transmitting end uses precoding P_iFor the first REG D of the ith group_iTransmit to the user after precoding the data of (i) 1, …, K, transmit to the receiving end after precoding the DMRS signals on the first and second DMRS ports of the jth second REG Rj with P2j-1 and P2j, respectively, P_iAnd a matrix with Nt x 1 columns, wherein Nt is the number of transmitting antennas/array elements/ports, and i is 1, …, K, j is 1, …, P. Here, the value of P includes, but is not limited to, 24/P for each REG corresponding to 2, 4, 6, 8, 12, that is, includes the following values:

k-4, P-2, r-12, or K-8, P-4, r-6, or K-12, P-6, r-4, or K-16, P-8, r-3, or K-24, P-12, r-2.

When N is 2, the transmitting end uses precoding P_iFor the first REG D of the ith group_iIs transmitted to the user after being precoded, and is transmitted to the user by P_iTo the ith second REG R_iThe DMRS signal on the jth DMRS port is transmitted to a receiving end after being precoded, P_iIs a matrix of Nt x 2 columns, and Nt is the number of transmit antennas/elements/ports. Here, the values of i ═ 1, …, P, j ═ 1, 2, and K ═ P, P include, but are not limited to, the values of 4, 6, 8, and 12, and the number of REs per REG is 24/P, that is, the following values are included:

k-4, P-4, r-6, or K-6, P-6, r-4, or K-8, P-8, r-3, or K-12, P-12, r-2.

When N is 3 or 4, the transmitting end uses precoding P_iFor the first REG D of the ith group_iIs transmitted to the user after being precoded, and is transmitted to the user by P_iTo the ith second REG R_iThe DMRS signal on the jth DMRS port is transmitted to a receiving end after being precoded, P_iIs a matrix of Nt x N columns, Nt being the number of transmit antennas/elements/ports. Where i is 1, …, P, j is 1, 2, …, N, K is P, the value of P includes but is not limited to the

values

2, 3, 4, 6, the number of REs per REG is 12/P,namely, the following values are included:

k-2, P-2, r-6, or K-3, P-3, r-4, or K-4, P-4, r-3, or K-6, P-6, r-2.

In N>4 hours, the transmitting end uses precoding P_iFor the first REG D of the ith group_iIs transmitted to the user after being precoded, and is transmitted to the user by P_iTo the ith second REG R_iThe DMRS signal on the jth DMRS port is transmitted to a receiving end after being precoded, P_iIs a matrix of Nt x N columns, Nt being the number of transmit antennas/elements/ports. Here, i ═ 1, …, P, j ═ 1, 2, …, N, K ═ P, the value of P includes but is not limited to the value of 3, and the number of REs per REG is 12/P, that is, the following values are included: k is 3, P is 3, r is 4

And the receiving end receives the data transmitted by the K first REGs and the DMRS signals transmitted by the P second REGs. And when N is 1, estimating a channel of data on the 2i-2+ j first REG by using the DMRS signal on the corresponding RE of the j port of the i-th second REG, and performing data detection on the channel, where i is 1, …, P, K is 2P, the value of P includes but is not limited to the

values

2, 4, 6, 8, and 12, and the number of REs of each corresponding REG is 12/P. Namely, the following values are included:

p-2, K-4, L-6, or P-3, K-6, L-4, or P-4, K-8, L-3, or P-6, K-12, L-2.

And when N is 2, estimating a channel of the jth data on the ith first REG by using the DMRS signal on the corresponding RE of the jth port of the ith second REG, and performing data detection on the channel, where i is 1, …, K, j is 1, 2, K is P, the value of P includes but is not limited to 4, 6, 8, 12, and the number of REs of each corresponding REG is 24/P. Namely, the following values are included:

k-4, P-4, r-6, or K-6, P-6, r-4, or K-8, P-8, r-3, or K-12, P-12, r-2.

And when N is 3 or 4, estimating a channel of the jth layer data on the ith first REG by using the DMRS signal on the RE corresponding to the jth port of the ith second REG, and performing data detection on the channel, where i is 1, …, K, j is 1, …, N, K is P, the value of P includes but is not limited to 2, 34, 6, and the number of REs of each corresponding REG is 12/P. Namely, the following values are included:

k-2, P-2, r-6, or K-3, P-3, r-4, or K-4, P-4, r-3, or K-6, P-6, r-2.

And when N is greater than 4, estimating a channel of a jth layer data on the ith first REG by using a DMRS signal on a corresponding RE of a jth port of the ith second REG, and performing data detection on the channel, where i is 1, …, K, j is 1, …, N, K is P, the value of P includes but is not limited to a value of 3, and the number of REs of each corresponding REG is 12/P. Namely, the following values are included: k is 3, P is 3, r is 4.

It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in a plurality of processors.

The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:

s11, dividing M DMRS ports into K DMRS port groups, wherein K, M is a positive integer, and K is less than or equal to M;

and S12, transmitting the DMRS on each DMRS port group by using independent precoding.

Optionally, the storage medium is further arranged to store program code for performing the steps of:

s21, receiving DMRSs of M demodulation reference signal DMRS ports, and dividing the M demodulation reference signal DMRS ports into K DMRS port groups;

and S22, channel estimation and/or information demodulation are carried out independently by using the DMRS on each DMRS port group, M and K are positive integers, and K is less than or equal to M.

s31, determining the number K of first REGs and the number P of second REGs in the PRB pair, wherein K, P is a positive integer and K is more than or equal to P;

s32, the first information is transmitted in the K first REGs, and the second information is transmitted in the P second REGs.

s41, receiving first information transmitted by K first REGs and second information transmitted by P second REGs of a physical resource block PRB pair, wherein K and P are positive integers, and K is greater than or equal to P;

s42, channel estimation is performed on the second information on the P second REGs independently, and information demodulation is performed on the first information on the K first REGs.

Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.

Alternatively, in the present embodiment, the processor performs the above S11-S12 according to program codes already stored in the storage medium.

Alternatively, in the present embodiment, the processor performs the above S21-S22 according to program codes already stored in the storage medium.

Alternatively, in the present embodiment, the processor performs the above S31-S32 according to program codes already stored in the storage medium.

Alternatively, in the present embodiment, the processor performs the above S41-S42 according to program codes already stored in the storage medium.

Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for transmitting information, comprising:

dividing M demodulation reference signal DMRS ports into K DMRS port groups, wherein K and M are positive integers, and K is less than or equal to M;

transmitting the DMRS using independent precoding on each of the DMRS port groups;

dividing REs for transmitting information on a PRB pair where the M DMRS ports are located into K REGs, and transmitting information on the K REGs by using independent precoding.

2. The method of claim 1, further comprising, prior to dividing the M DMRS ports into the K DMRS port groups:

determining the M, the K, and a channel rank N, wherein N is a positive integer.

3. The method of claim 2, wherein determining the M, the K, and a channel rank N comprises:

determining the K according to the N and the M; or determining the N according to the K and the M; or determining the M according to the K and the N; wherein K N is less than or equal to M.

4. The method of claim 3, wherein M = N K when N =1 or N = 2.

5. The method of claim 1, wherein each DMRS port in the group of DMRS ports includes 12 Resource Elements (REs).

6. The method of claim 1, wherein the information transmitted in each of the REGs comprises: data and/or control channel information.

7. The method of claim 1, wherein each of the K DMRS port groups and the REG of the K REGs corresponding to the each DMRS port group use a same precoding.

8. A method for receiving information, comprising:

receiving DMRSs of M demodulation reference signal DMRS ports, and dividing the M demodulation reference signal DMRS ports into K DMRS port groups;

carrying out channel estimation and/or information demodulation independently by using the DMRS on each DMRS port group, wherein M and K are positive integers, and K is less than or equal to M;

and receiving information transmitted on the PRB pair where the M DMRS ports are located, and dividing REs used for transmitting the information on the PRB pair where the M DMRS ports are located into K REGs.

9. The method of claim 8, wherein prior to dividing the M DMRS ports into the K DMRS port groups, the method further comprises:

determining the M, the K, and a received channel rank N, wherein N is a positive integer.

10. The method of claim 9, wherein determining the M, the K, and a channel rank N comprises:

11. The method of claim 10, wherein M = N × K when N =1 or N = 2.

12. The method of claim 8, wherein each DMRS port in the group of DMRS ports includes 12 Resource Elements (REs).

13. The method of claim 8, wherein the value of K is determined by the number of Resource Element Groups (REGs) partitioned by REs used for transmitting information on the PRB pair in which the M DMRS ports are located.

14. The method of claim 8, wherein the information transmitted in the REG comprises: data and/or control channel information.

15. The method of claim 8, wherein the utilizing DMRS on each of the DMRS port groups for information demodulation independently comprises:

and each of the K DMRS port groups demodulates the information of the REG corresponding to each DMRS port group in the K REGs.

16. The method of claim 8, wherein the channel rank N comprises at least one of: the number of data transmission layers, the number of data transmission streams, the number of data layers, channel Rank, the number of control channel transmission layers, the number of control channel transmission streams, the number of control channel layers, the number of transmission streams, the number of layers, and the number of precoding columns.

17. A method for transmitting information, comprising:

determining the number K of first REGs and the number P of second REGs in a physical resource block PRB pair, wherein the K and the P are positive integers, and the K is more than or equal to the P;

transmitting first information in K of the first REGs and second information in P of the second REGs;

transmitting first information in K of the first REGs and second information in P of the second REGs, comprising: transmitting the first information with independent precoding in the K first REGs, respectively, and transmitting second information with independent precoding in the P second REGs, respectively.

18. The method of claim 17, wherein the first information comprises: data and/or control channel information, the second information comprising: and pilot information.

19. The method of claim 17, wherein prior to transmitting first information in K of the first REGs and second information in P of the second REGs, the method further comprises:

dividing the physical resource block PRB into the K first REGs and/or the P second REGs.

20. The method of claim 17, wherein the first REG is a group of Resource Elements (REs) in the PRB pair used for transmitting the first information, and wherein the second REG is a group of REs in the PRB pair used for transmitting the second information.

21. The method of claim 17, wherein the ith second REG R_iComprising r_iA RE and L_iThe r is commonly used by all DMRS ports_iRE, wherein i, r_iAnd L_iIs a positive integer, and i is more than or equal to 1 and less than or equal to P.

22. The method of claim 21, wherein L is_i= L, where L is determined by channel rank N, L, N and i are positive integers and 1 ≦ i ≦ P.

23. The method of claim 22, wherein when N =1 or 2, L = 2; when N is greater than 2, L = N.

24. The method of claim 22, wherein the first number of REGs, K, the second number of REGs, P, and the number of DMRS ports per second REG, L, satisfy the relationship: k × N = P × L.

25. The method of claim 22, wherein K =2P when N = 1; and when the N is greater than 1, K = P.

26. The method of claim 17, wherein the ith second REG R_iNumber of contained REs r_i= r, wherein r is determined by the channel rank N, and r and i are positive integers, 1 ≦ i ≦ P.

27. The method of claim 26, wherein when N =1 or 2, R = R/P, where R is a total number of REs transmitting the DMRS in the PRB pair, and R is a positive integer; when N is greater than 2, r = 12/P.

28. The method of claim 26,

when N =1 and the total number of REs used for transmitting DMRSs in the PRB pair is 12, values of the number K of the first REG, the number P of the second REG, and the number r of REs included in the second REG include the following combinations: k =2, P =1, r =12, or K =4, P =2, r =6, or K =6, P =3, r =4, or K =8, P =4, r =3, or K =12, P =6, r = 2; alternatively, the first and second electrodes may be,

when N =2 and the total number of REs used for transmitting DMRSs in the PRB pair is 12, values of the number K of the first REGs, the number P of the second REGs, and the number r =12/P of REs included in the second REGs include the following combinations: k =2, P =2, r =6, or K =3, P =3, r =4, or K =4, P =4, r =3, or K =6, P =6, r = 2; alternatively, the first and second electrodes may be,

when N =1 and the total number of REs used for transmitting DMRSs in the PRB pair is 24, values of the number K of the first REGs, the number P of the second REGs, and the number r =24/P of REs included in the second REGs include the following combinations: k =4, P =2, r =12, or K =8, P =4, r =6, or K =12, P =6, r =4, or K =16, P =8, r =3, or K =24, P =12, r = 2; alternatively, the first and second electrodes may be,

when N =2 and the total number of REs used for transmitting DMRSs in the PRB pair is 24, values of the number K of the first REGs, the number P of the second REGs, and the number r =24/P of REs included in the second REGs include the following combinations: k =4, P =4, r =6, or K =6, P =6, r =4, or K =8, P =8, r =3, or K =12, P =12, r = 2; alternatively, the first and second electrodes may be,

when N =3 or 4 and the total number of REs used for transmitting DMRSs in the PRB pair is 24, values of the number K of the first REGs, the number P of the second REGs, and the number r =12/P of REs included in the second REGs include the following combinations: k =2, P =2, r =6, or K =3, P =3, r =4, or K =4, P =4, r =3, or K =6, P =6, r = 2; alternatively, the first and second electrodes may be,

when the N >4 and the total number of REs used for transmitting the DMRS in the PRB pair is 24, values of the number K of the first REG, the number P of the second REG, and the number r =12/P of REs included in the second REG include the following combinations: k =3, P =3, r = 4.

29. The method according to any of claims 22 to 28, wherein the channel rank N comprises at least one of: the number of data transmission layers, the number of data transmission streams, the number of data layers, channel Rank, the number of control channel transmission layers, the number of control channel transmission streams, the number of control channel layers, the number of transmission streams, the number of layers, and the number of precoding columns.

30. A method for receiving information, comprising:

receiving first information transmitted by K first REGs and second information transmitted by P second REGs of a physical resource block PRB pair, wherein K and P are positive integers, and K is more than or equal to P;

performing channel estimation on the second information on the P second REGs independently, and performing information demodulation on the first information on the K first REGs;

receiving first information transmitted by K first REGs and second information transmitted by P second REGs of a physical resource block PRB pair, comprising: and receiving the first information transmitted by using independent precoding in the K first REGs of the physical resource block PRB pair and the second information transmitted by using independent precoding in the P second REGs of the physical resource block PRB pair.

31. The method of claim 30, wherein the first information comprises: data and/or control channel information, the second information comprising: and pilot information.

32. An apparatus for transmitting information, comprising:

the first division module is used for dividing M demodulation reference signal DMRS ports into K DMRS port groups, wherein K and M are positive integers, and K is less than or equal to M;

a first transmission module for transmitting the DMRS on each of the DMRS port groups using independent precoding;

the transmission device is further configured to divide REs for transmitting information on the PRB pair where the M DMRS ports are located into K REGs, and transmit information using independent precoding on the K REGs.

33. An apparatus for receiving information, comprising:

the device comprises a first division module, a second division module and a third division module, wherein the first division module is used for receiving DMRS (demodulation reference signals) of M DMRS ports and dividing the M DMRS ports into K DMRS port groups;

the first demodulation module is used for independently carrying out channel estimation and/or information demodulation by using the DMRS on each DMRS port group, M and K are positive integers, and K is less than or equal to M;

the receiving device is further configured to receive information transmitted on the PRB pair where the M DMRS ports are located, and divide REs used for transmitting the information on the PRB pair where the M DMRS ports are located into K REGs.

34. An apparatus for transmitting information, comprising:

the device comprises a determining module, a determining module and a judging module, wherein the determining module is used for determining the number K of first REGs and the number P of second REGs in a physical resource block PRB pair, wherein the K and the P are positive integers, and the K is more than or equal to the P;

a second transmission module for transmitting first information in the K first REGs and second information in the P second REGs;

the second transmission module is further configured to transmit the first information using independent precoding in the K first REGs, and transmit the second information using independent precoding in the P second REGs.

35. An apparatus for receiving information, comprising:

a receiving module, configured to receive first information transmitted by K first REGs and second information transmitted by P second REGs of a physical resource block PRB pair, where K and P are positive integers, and K is greater than or equal to P;

a second demodulation module, configured to perform channel estimation on the second information on the P second REGs independently, and perform information demodulation on the K first REG first information;

the receiving module is further configured to receive the first information transmitted by using independent precoding in the K first REGs of the physical resource block PRB pair, and the second information transmitted by using independent precoding in the P second REGs of the physical resource block PRB pair.