CN107046456B

CN107046456B - Information sending and receiving method and device

Info

Publication number: CN107046456B
Application number: CN201610082242.9A
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: 2021-01-26
Anticipated expiration: 2036-02-05
Also published as: WO2017133520A1; CN107046456A

Abstract

The invention provides a method and a device for sending and receiving information, wherein the method for sending the information comprises the following steps: dividing M PRB pairs into K REGs; information is transmitted using independent precoding on the K REGs, respectively. According to the invention, under the condition that the precoding granularity in the open-loop MIMO in the related technology is at least one PRB pair, M PRB pairs are divided into K REGs, and independent precoding transmission information is respectively used on the K REGs to divide the precoding granularity to a smaller extent, so that the problem of performance reduction of the open-loop MIMO in the related technology due to overlarge precoding granularity is solved, and the effect of improving the performance of the open-loop MIMO is further achieved.

Description

Information sending 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 as to effectively improve the system performance, obtain significant performance improvement without increasing bandwidth and power, and be a very promising technology and widely applied to the current system. For example, in a Long Term Evolution (Long Term Evolution, abbreviated as LTE) system and an enhanced version thereof (i.e., an enhanced Long Term Evolution-Advanced (LTE a) system, there are multiple modes of multi-antenna technology transmission, where the transmission mode2 is space-frequency diversity, the transmission mode3 is open-loop spatial multiplexing or is referred to as open-loop MIMO technology, the transmission mode 4 is closed-loop spatial multiplexing, the transmission mode 5 is multi-user MIMO, the transmission mode 6 is closed-loop spatial multiplexing of a single data stream, the transmission modes 7 and 8 are single-stream and dual-stream beamforming, respectively, and the transmission mode 9 supports spatial multiplexing of a maximum 8 layers, and can implement adaptive switching between users and data layers, 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 a closed-loop MIMO technique, and some do not require a Precoding Matrix Indicator (PMI) and are called an open-loop MIMO technique. 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. Taking 4 antennas as an example, Release 8TM3 uses the codeword in table 1 for precoding and uses the Large Delay CDD technique in table 2.

TABLE 1 Codebook for transmission on anti ports {0,1,2,3}.

TABLE 2 large-delay cyclic delay diversity.

The precoding used by Resource Elements (REs) on the ith carrier is w (i) ═ C_k，

C₁,C₂,C₃,C₄Corresponding to code words with

indexes

12, 13, 14 and 15, respectively.

Open-loop precoding can be expressed as shown in equation (1):

here, y^(j)(i) Denotes the reception data of the jth receiving port on carrier i, and x^(k)(i) It indicates the transmission data on the ith carrier on the kth data layer, j is 0, …, P-1, k is 0, …, v-1, P is the number of receiving ports, and v is the number of data transmission layers. Since CRS supports 4 ports at maximum, TM3 does not support the case of more than 4 ports.

As more and more transmitting ports are configured for a base station, an open-loop MIMO technology supporting more ports also needs to be supported, in release 10 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), but the precoding granularity is at least one Physical Resource Block Group (PRB), and in an FDD system, the precoding granularity is greater than one PRB based on a Physical Resource Block Group (PRBG) level, and the number of PRBs included in one PRBG is shown in table 3.

TABLE 3

The same precoding is used for the REs included in the PRBGs, and the precoding used between the PRBGs may be different. When the base station with the higher moving speed can not accurately acquire the channel direction information, the open-loop MIMO transmission can be realized by flexibly and dynamically changing the pre-coding weight value among the PRBG. In LTE, a PRBG includes 12 × N subcarriers, and N > -1, so the granularity of precoding is generally greater than or equal to 12 carriers, and since the granularity of precoding is relatively large, the problem that the performance of the open-loop MIMO technology cannot be fully exerted is caused.

For the problem of performance degradation of open-loop MIMO due to too large precoding granularity in the related art, no solution is proposed at present.

Disclosure of Invention

The invention provides a method and a device for sending and receiving information, which at least solve the problem of performance reduction of open-loop MIMO due to overlarge precoding granularity in the related technology.

According to an aspect of the present invention, there is provided a method for transmitting information, including: dividing M physical resource block PRB pairs into K resource unit groups REG; and transmitting information by using independent precoding on the K REGs respectively, wherein M and K are positive integers, and M is less than K.

Optionally, the dividing M PRB pairs into K REGs includes at least one of: dividing the M PRB pairs into K REGs according to the cyclic prefix information of the subframes where the M PRB pairs are located; dividing the M PRB pairs into K REGs according to the subframe type information of the subframes where the M PRB pairs are located; dividing the M PRB pairs into K REGs according to channel state information; dividing the M PRB pairs into K REGs according to the PCFICH information of the physical control format indicator channel of the physical downlink control channel; dividing the M PRB pairs into K REGs according to slot index information; dividing the M PRB pairs into K REGs according to the size information of the system bandwidth; dividing the M PRB pairs into K REGs according to the transmission bandwidth size information; dividing the M PRB pairs into K REGs according to a feedback mode; dividing the M PRB pairs into K REGs according to a transmission mode; dividing the M PRB pairs into K REGs according to PMI disablinking; dividing the M PRB pairs into K REGs according to CSI feedback categories.

Optionally, under the condition that the M PRB pairs are divided into K REGs according to the subframe type information of the subframe where the M PRB pairs are located, the subframe type information includes: DwPTS type information and/or normal subframe type information of the TDD special subframe, wherein the DwPTS type information is determined by special subframe configuration signaling.

Optionally, the K is transmitted through higher layer signaling or physical layer signaling.

Optionally, the REG granularity feedback channel state information enabling information is transmitted through higher layer signaling or physical layer signaling.

Optionally, dividing the M PRB pairs into K REGs includes: dividing consecutive REs into one REG; alternatively, discrete REs are divided into one REG.

Optionally, the information includes: data and enhanced control channel information.

Optionally, the REG comprises: the set of REs corresponding to N1 OFDM/OFDMA symbols and M1 subcarriers, where N1 is less than the number of symbols of M PRB pairs where REGs are located, and M1 is less than the number of subcarriers of M PRB pairs where REGs are located.

According to another aspect of the present invention, there is also provided a method for receiving information, including: receiving information transmitted through M physical resource blocks and M PRB pairs; dividing the M PRB pairs into K Resource Element Groups (REGs), wherein M and K are positive integers, and M is smaller than K; and performing channel estimation and/or detecting information on the REGs by using demodulation reference pilot DMRS on the K REGs independently.

Optionally, the dividing the M PRB pairs into K resource element groups REG includes at least one of: dividing the M PRB pairs into K REGs according to the indication of the received cyclic prefix information of the subframe; dividing the M PRB pairs into K REGs according to the subframe type information of the received subframe; dividing the M PRB pairs into K REGs according to the received channel state information indication; dividing the M PRB pairs into K REGs according to the received Physical Control Format Indicator Channel (PCFICH) information of the physical downlink control channel; dividing the M PRB pairs into K REGs according to slot index information; dividing the M PRB pairs into K REGs according to the received system bandwidth size information; dividing the M PRB pairs into K REGs according to the received transmission bandwidth size information; dividing the M PRB pairs into K REGs according to a feedback mode; dividing the M PRB pairs into K REGs according to a transmission mode; dividing the M PRB pairs into K REGs according to PMI disablinking; dividing the M PRB pairs into K REGs according to CSI feedback categories.

Optionally, under the condition that the M PRB pairs are divided into K REGs according to the subframe type information of the received subframe, the subframe type information includes DwPTS type information and/or normal subframe type information of a TDD special subframe, and the DwPTS type information is determined by special subframe configuration signaling.

Optionally, the REG granularity feedback channel state information enabling information is transmitted through received high-layer signaling or physical layer signaling; and judging whether the granularity feedback channel state information specified according to the traditional method is required or not according to the REG granularity feedback channel state information enabling information.

Optionally, determining the number K of REGs according to the received high-layer signaling or physical layer precoding granularity parameter configuration signaling; or, determining the number K of REGs according to a default value of pre-coding granularity parameter configuration agreed by the transmitting end and the receiving end.

Optionally, dividing the M PRB pairs into K resource element groups REG includes: dividing consecutive REs into one REG; alternatively, discrete REs are divided into one REG.

Optionally, the information includes: data and control channel information.

Optionally, the REG comprises: a set of Resource Elements (REs) corresponding to N1 OFDM/OFDMA symbols and M1 subcarriers, wherein N1 is smaller than the number of symbols of M PRB pairs where REGs are located, and M1 is smaller than the number of subcarriers of M PRB pairs where REGs are located.

According to another aspect of the present invention, there is provided an apparatus for transmitting information, including: a first dividing module, configured to divide M PRB pairs of M physical resource blocks into K resource element groups REG; a transmission module, configured to transmit information using independent precoding on the K REGs, where M and K are positive integers, and M is smaller than K.

Optionally, the first partitioning module includes at least one of: a first dividing unit, configured to divide the M PRB pairs into K REGs according to cyclic prefix information of subframes where the M PRB pairs are located; a second dividing unit, configured to divide the M PRB pairs into K REGs according to subframe type information of subframes in which the M PRB pairs are located; a third dividing unit, configured to divide the M PRB pairs into K REGs according to channel state information; a fourth dividing unit, configured to divide the M PRB pairs into K REGs according to PCFICH information of a physical control format indicator channel of a physical downlink control channel; a fifth dividing unit, configured to divide the M PRB pairs into K REGs according to slot index information; a sixth dividing unit, configured to divide the M PRB pairs into K REGs according to system bandwidth size information; a seventh dividing unit, configured to divide the M PRB pairs into K REGs according to transmission bandwidth size information; an eighth dividing unit, configured to divide the M PRB pairs into K REGs according to a feedback pattern; a ninth dividing unit, configured to divide the M PRB pairs into K REGs according to a transmission mode; a tenth dividing unit, configured to divide the M PRB pairs into K REGs according to PMI disabling; an eleventh dividing unit configured to divide the M PRB pairs into K REGs according to a CSI feedback category.

According to another aspect of the present invention, there is also provided a receiving module, configured to receive information transmitted through M physical resource block PRB pairs; a second dividing module, configured to divide the M PRB pairs into K resource element groups REG, where M and K are positive integers and M is smaller than K; and the processing module is used for performing channel estimation and information detection on the REG by independently using a demodulation reference pilot DMRS on the K REGs respectively.

Optionally, the second dividing module includes at least one of: a twelfth dividing unit, configured to divide the M PRB pairs into K REGs according to a cyclic prefix information indication of a received subframe; a thirteenth dividing unit, configured to divide the M PRB pairs into K REGs according to subframe type information of a received subframe; a fourteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received csi indicator; a fifteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received PCFICH information of the pdcch; a sixteenth dividing unit, configured to divide the M PRB pairs into K REGs according to slot index information; a seventeenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received system bandwidth size information; an eighteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received transmission bandwidth size information; a nineteenth dividing unit, configured to divide the M PRB pairs into K REGs according to a feedback pattern; a twentieth dividing unit configured to divide the M PRB pairs into K REGs according to a transmission mode; a twenty-first dividing unit configured to divide the M PRB pairs into K REGs according to PMI disabling; a twenty-second partitioning unit to partition the M PRB pairs into K REGs according to CSI feedback categories.

By adopting the method for dividing M PRB pairs into K REGs and respectively using independent precoding to transmit information on the K REGs, the sending end divides the M PRB pairs into K REGs under the condition that the precoding granularity in the open-loop MIMO in the related technology is at least one PRB pair, and respectively uses independent precoding to transmit information on the K REGs to divide the precoding granularity into smaller ones, thereby solving the problem of performance reduction caused by overlarge precoding granularity in the open-loop MIMO in the related technology and further achieving the effect of improving the performance of the open-loop MIMO.

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 flowchart of a method of transmitting information according to an embodiment of the present invention;

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

fig. 3 is a block diagram of a transmitting apparatus of information according to an embodiment of the present invention;

fig. 4 is a block diagram of a structure of a receiving apparatus of information according to an embodiment of the present invention;

fig. 5 is a schematic diagram of PRB regions under a normal cyclic prefix subframe according to an embodiment of the invention;

fig. 6 is a schematic diagram of PRB regions under an extended cyclic prefix subframe according to an embodiment of the present invention;

fig. 7 is a schematic diagram of {3,4,8} PRB regions configured under a normal cyclic prefix subframe according to an embodiment of the present invention;

fig. 8 is a schematic diagram of {1,2,6,7} PRB region configuration under an extended cyclic prefix subframe according to an 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 the present embodiment, a method for sending information is provided, and fig. 1 is a flowchart of the method for sending information according to the embodiment of the present invention, as shown in fig. 1, the flowchart includes the following steps:

step S102, dividing M physical resource block PRB pairs into K resource unit groups REG, wherein M and K are positive integers, and M is smaller than K;

step S104, transmitting information on the K REGs by using independent precoding respectively.

Through the steps, under the condition that the precoding granularity in the open-loop MIMO in the related technology is at least one PRB pair, M PRB pairs are divided into K REGs, independent precoding transmission information is respectively used on the K REGs, and the precoding granularity is divided to be smaller, so that the problem of performance reduction of the open-loop MIMO in the related technology due to overlarge precoding granularity is solved, and the effect of improving the performance of the open-loop MIMO is further achieved.

In the step S102, at least one of the following steps may be included:

dividing the M PRB pairs into K REGs according to the cyclic prefix information of the subframe where the M PRB pairs are located, wherein the cyclic prefix information of the subframe comprises: normal cyclic prefix subframe information and extended cyclic prefix subframes;

dividing the M PRB pairs into K REGs according to subframe type information of subframes in which the M PRB pairs are positioned, wherein the subframe type information comprises a normal subframe type and a DwPTS type of a TDD special subframe;

dividing the M PRB pairs into K REGs according to channel state information, wherein the channel state information comprises channel rank/data transmission layer number;

dividing the M PRB pairs into K REGs according to Physical Control Format Indicator CHannel (PCFICH) information of a Physical downlink Control CHannel, wherein the value of the PCFICH information is a Control Format Indicator (CFI) when the bandwidth is greater than 10 PRBs, the value of the PCFICH information is CFI +1 when the bandwidth is less than 10 PRBs, and the value of the CFI is 1-3;

dividing the M PRB pairs into K REGs according to slot index information;

dividing the M PRB pairs into K REGs according to the size information of the system bandwidth;

dividing the M PRB pairs into K REGs according to the transmission bandwidth size information;

dividing the M PRB pairs into K REGs according to a feedback Mode, wherein the feedback Mode includes but is not limited to a periodic feedback Mode 1-0, a Mode 1-1, a Mode 2-0, a Mode 2-1 and a non-periodic feedback Mode 2-0, a Mode 3-1 and a Mode 3-2;

dividing the M PRB pairs into K REGs according to a transmission mode, including but not limited to TM1, TM2, TM3, TM4, TM5, TM6, TM7, TM9, TM 10;

dividing the M PRB pairs into K REGs according to PMI disablinking;

the M PRB pairs are divided into K REGs according to CSI feedback categories, including but not limited to Class a, Class B.

In an optional embodiment, in the case that M PRB pairs are divided into K REGs according to the subframe type information of the subframe where the M PRB pairs are located, the subframe type information includes DwPTS type information and/or normal subframe type information of a TDD special subframe, and the DwPTS type information may be determined by a special subframe configuration signaling.

In an optional embodiment, K may be transmitted through higher layer signaling or physical layer signaling, where K is used for partitioning M PRB pairs received by the receiving end according to K.

In an alternative embodiment, the REG granularity feedback channel state information enabling information may be transmitted through higher layer signaling or physical layer signaling, where the REG granularity feedback channel state information enabling information includes two types of information, enable and disable, where the REG granularity feedback channel state information enabling information is the granularity calculation and feedback channel state information based on REG granularity when enabled, otherwise, the REG granularity feedback channel state information is the granularity feedback channel state information specified by the conventional method.

In an optional embodiment, dividing M PRB pairs into K REGs includes: dividing consecutive REs into one REG; alternatively, discrete REs are divided into one REG. In this alternative embodiment, the form of dividing REGs may be: REs in REG are continuous or REs in REG are discrete.

The M PRB pairs are divided into K REGs, and the attributes of the division may include RE forms of the divided REGs, granularity of the divided REGs, and the number K of the divided REGs.

In an alternative embodiment, the information transmitted may include: data and control channel information.

In an alternative embodiment, the REG may include: n1 OFDM/OFDMA symbols and a set of REs corresponding to M1 subcarriers, where N1 is smaller than the number of symbols of M PRB pairs where REGs are located, and M1 is smaller than the number of subcarriers of M PRB pairs where REGs are located.

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

step S202, receiving information transmitted by M PRB pairs;

step S204, dividing M PRB pairs into K REGs, wherein M and K are positive integers, and M is smaller than K;

step S206, channel estimation and/or detection of information on the REGs is performed on the K REGs using DMRSs independently.

Through the steps, under the condition that the precoding granularity in the open-loop MIMO in the related technology is at least one PRB pair, a receiving end divides the received M PRB pairs into K REGs, and independent DMRS is used for channel estimation and/or information detection on the K REGs respectively, so that the demodulation granularity of the PRB pairs is divided into smaller ones, the problem of performance reduction caused by too large precoding granularity in the open-loop MIMO in the related technology is solved, and the effect of improving the performance of the open-loop MIMO is further achieved.

In an alternative embodiment, the step S204 may include at least one of the following steps:

dividing M PRB pairs into K REGs according to the indication of the cyclic prefix information of the received subframe, wherein the cyclic prefix information of the subframe comprises normal cyclic prefix subframe information and extended cyclic prefix subframe information;

dividing M PRB pairs into K REGs according to subframe type information of a received subframe, wherein the subframe type information comprises a normal subframe type and a DwPTS type of a TDD special subframe;

dividing M PRB pairs into K REGs according to the received channel state information indication, wherein the channel state information indication comprises channel rank/data transmission layer number;

dividing M PRB pairs into K REGs according to received PCFICH information of a physical control format indicator channel of a physical downlink control channel, wherein the value of the PCFICH information is CFI when the bandwidth is greater than 10 PRBs, and is CFI +1 when the bandwidth is less than 10 PRBs, and the value of the CFI is 1-3;

dividing M PRB pairs into K REGs according to slot index information;

dividing M PRB pairs into K REGs according to the received system bandwidth size information;

dividing M PRB pairs into K REGs according to received transmission bandwidth size information

Dividing the M PRB pairs into K REGs according to a feedback Mode, wherein the feedback Mode includes but is not limited to a periodic feedback Mode 1-0, Mode 1-1, Mode 2-0, Mode 2-1 and a non-periodic feedback Mode 2-0, Mode 3-1, Mode 3-2;

dividing the M PRB pairs into K REGs according to a transmission mode, wherein the transmission mode includes, but is not limited to, TM1, TM2, TM3, TM4, TM5, TM6, TM7, TM9, TM 10;

dividing the M PRB pairs into K REGs according to PMI disablinking;

the M PRB pairs are divided into K REGs according to CSI feedback categories, which may include, but are not limited to, Class a, Class B.

In an optional embodiment, in the case that M PRB pairs are divided into K REGs according to the subframe type information of the received subframe, the subframe type information may include DwPTS type information and/or normal subframe type information of the TDD special subframe, and the DwPTS type information is determined by the special subframe configuration signaling.

In an alternative embodiment, the REG granularity feedback channel state information enabling information may be received through a received higher layer signaling or physical layer signaling, wherein the REG granularity feedback channel state information enabling information includes two kinds of information, enable and disable, wherein the REG granularity feedback channel state information enabling information is calculated and fed back based on the REG granularity when enabled, otherwise the REG granularity feedback channel state information is specified by a conventional method; and judging whether the granularity feedback channel state information specified according to the traditional method is required or not according to the received REG granularity feedback channel state information enabling information.

In an optional embodiment, the number K of REGs may be determined according to the received higher layer signaling or physical layer precoding granularity parameter configuration signaling; or, the number K of REGs may also be determined according to a default value of the pre-coding granularity parameter configuration agreed by the transmitting end and the receiving end.

In an optional embodiment, dividing the M PRB pairs into K resource element groups REG may include: dividing consecutive REs into one REG; alternatively, discrete REs are divided into one REG.

In an alternative embodiment, the received information may include: data and control channel information.

In an alternative embodiment, the REG may include: a set of Resource Elements (REs) corresponding to N1 OFDM/OFDMA symbols and M1 subcarriers, wherein N1 is smaller than the number of symbols of M PRB pairs where REGs are located, and M1 is smaller than the number of subcarriers of M PRB pairs where REGs are located.

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 sending 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. 3 is a block diagram of a transmitting apparatus of information according to an embodiment of the present invention, which includes a first division module 32 and a transmission module 34, as shown in fig. 3, and is explained below.

A first dividing module 32, configured to divide M PRB pairs into K REGs; a transmission module 34, connected to the first partitioning module 32, configured to transmit information on K REGs respectively using independent precoding, where M and K are positive integers, and M is smaller than K.

In an alternative embodiment, the first division module 32 may include at least one of: the first dividing unit is used for dividing the M PRB pairs into K REGs according to the cyclic prefix information of the subframes where the M PRB pairs are located; the second dividing unit is used for dividing the M PRB pairs into K REGs according to the subframe type information of the subframes where the M PRB pairs are located; a third dividing unit, configured to divide the M PRB pairs into K REGs according to the channel state information; a fourth dividing unit, configured to divide M PRB pairs into K REGs according to PCFICH information of a physical control format indicator channel of a physical downlink control channel; a fifth dividing unit, configured to divide the M PRB pairs into K REGs according to the slot index information; a sixth dividing unit, configured to divide the M PRB pairs into K REGs according to the system bandwidth size information; a seventh dividing unit, configured to divide the M PRB pairs into K REGs according to the transmission bandwidth size information; an eighth dividing unit, configured to divide the M PRB pairs into K REGs according to the feedback pattern; a ninth dividing unit for dividing the M PRB pairs into K REGs according to the transmission mode; a tenth dividing unit, configured to divide the M PRB pairs into K REGs according to PMI disabling; an eleventh dividing unit for dividing the M PRB pairs into K REGs according to the CSI feedback category.

Fig. 4 is a block diagram of a structure of an apparatus for receiving information according to an embodiment of the present invention, which includes a receiving module 42, a second dividing module 44, and a processing module 46, as shown in fig. 4, and is explained below.

A receiving module 42, configured to receive information transmitted through the M PRB pairs; a second dividing module 44, connected to the receiving module 42, configured to divide the M PRB pairs into K REGs, where M and K are positive integers, and M is smaller than K; and a processing module 46, connected to the second dividing module 44, for performing channel estimation on the K REGs and/or performing information detection on the REGs, respectively and independently using DMRSs.

In an optional embodiment, the second dividing module may include at least one of: a twelfth dividing unit, configured to divide the M PRB pairs into K REGs according to the cyclic prefix information indication of the received subframe; a thirteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the subframe type information of the received subframe; a fourteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received csi indicator; a fifteenth dividing unit, configured to divide M PRB pairs into K REGs according to the received PCFICH information of the pdcch; a sixteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the slot index information; a seventeenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received system bandwidth size information; an eighteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received transmission bandwidth size information; a nineteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the feedback pattern; a twentieth dividing unit for dividing the M PRB pairs into K REGs according to the transmission mode; a twenty-first dividing unit, configured to divide the M PRB pairs into K REGs according to PMI disabling; a twenty-second partitioning unit for partitioning the M PRB pairs into K REGs according to the CSI feedback category.

The following describes a method and apparatus for transmitting and receiving information according to the present invention, with reference to specific embodiments.

In the embodiment of the present invention, in the downlink, the transmitting 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 receiving end includes but is not limited to: various receiving devices such as a data card, a mobile phone, a notebook computer, a personal computer, a tablet computer, a personal digital assistant, bluetooth and the like. The receiving end includes, but is not limited to, concepts such as the number of data transmission layers, the number of data transmission streams, the number of data layers, channel Rank, RI, Rank, and the like.

In the uplink, 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 transmitting end includes but is not limited to: various receiving devices such as a data card, a mobile phone, a notebook computer, a personal computer, a tablet computer, a personal digital assistant, bluetooth and the like. The transmitting end includes, but is not limited to, concepts such as the number of data transmission layers, the number of data transmission streams, the number of data layers, channel Rank, RI, Rank, and the like.

Example 1 partitioning REGs based on Cyclic Prefix information of subframes

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 bandwidth used by the system is Nb PRB pairs (i.e., system bandwidth), each PRB pair being a set S of resource elements REs comprising Nc subcarriers and Ns OFDM/OFDMA symbols, which includes M REs. For example, under the condition of a normal cyclic prefix and a carrier spacing of 15K, a PRB pair of LTE/LTE a includes Nc ═ 12 subcarriers, Ns ═ 14 regions of OFDM symbols, including 168 REs, and under an extended cyclic prefix subframe or a TDD special subframe, the number of OFDM symbols may take different values, and the number of subcarriers under different carrier spacings is different, but does not affect the application of the method of this embodiment. In 168 REs in the PRB pair, REs corresponding to CFI symbols are used for transmitting a Physical Downlink Control Channel (PDCCH), and symbols of CFI + 1-Ns are used for transmitting physical downlink data. In this embodiment, a transmitting end transmits data to a receiving end in Nb1 PRB pairs and transmits demodulation reference pilots DMRSs, and a user performs channel estimation using the DMRSs, estimates a channel of a data region according to the estimated channel, performs data detection, and demodulates the channel. This process is described in detail as follows:

for the sending end:

the transmitting end divides the REs in each PRB pair into K resource element groups G1, G2, …, GK, each group includes M1, M2, …, MK REs, and one RE in the same PRB pair belongs to and only belongs to one REG group, that is, REs of any two different REG groups are different.

Preferably, M1, M2, …, MK may be equal, for example, equal to M0/K REs, where M0 is the number of REs used to transmit data, and K may take a value of 2,3,4,6,8, etc.

Here, REs in each REG of the K REGs may be continuous REs in time, or discrete REs in time, or may be REs on continuous subcarriers in frequency domain, or may be REs on discrete carriers.

Here, the transmitting end divides each PRB pair in the transmission resource into K resource element groups REG according to cyclic prefix information of a subframe, where the cyclic prefix information of the subframe includes a normal cyclic prefix subframe and an extended cyclic prefix subframe. For example, a division method under the condition that the downlink control signal comprises l0 OFDM symbols is as follows:

under a normal cyclic prefix subframe, as shown in fig. 5, a PRB pair region is divided into 3 REGs, where 12 subcarriers are occupied in the frequency domain, OFDM symbols with indexes l 0-13 in the data region are divided into three sets C1, C2, and C3 in the time domain, and the sets correspond to 3 REGs, respectively, and for example, REs with an index l of the OFDM symbol belonging to C1 are 1 REG, REs with an index l belonging to C2 are one REG, REs with an index l belonging to C3 are one REG, and are G1, G2, and G3, respectively. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time-domain frequency-domain joint division, where, at a carrier index k of S1, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, symbol index l of C3 is one REG, at a carrier index k of S2, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, and symbol index l of C3 is one REG. Here, the division into 3 in the time domain is just exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers. Here, the symbol indexes corresponding to C1 are L0 to L1, the symbol indexes corresponding to C2 are L1+1 to L2, and the symbol indexes corresponding to C3 are L2+1 to L-1, where L is the total number of symbols included in a PRB pair, where the value is 14, where L1 is smaller than L2, and preferably, the values are such that the numbers of elements in sets C1, C2, and C3 are different by one.

Under the extended cyclic prefix subframe, as shown in fig. 6, a PRB pair region is divided into 2 REGs, where 12 subcarriers are occupied in the frequency domain, and OFDM symbols with indexes of 2 to 11 in the data region are divided into 2 REGs in the time domain, for example, REs corresponding to OFDM symbol indexes l of l0 to l1 are 1 REG, REs corresponding to l1+1 to 11 are one REG, which are G1 and G2, respectively. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time domain and frequency domain joint division, wherein on the condition that a carrier index k is S1, the RE corresponding to a symbol index l of l 0-l 1 on the time domain is 1 REG, and the RE corresponding to the symbol index l of l1+ 1-11 on the time domain is one REG; when the carrier index k is S2, REs corresponding to symbol indexes l 0-l 1 in the time domain are 1 REG, and REs corresponding to symbol indexes l1+ 1-11 in the time domain are one REG. Here, the division into 2 in the time domain is merely exemplified, and similar results can be obtained for the division into other K values. The case of subcarrier dispersion can also be obtained similarly, for example, the subcarriers are divided into two sets S1 and S2, S1 corresponds to odd-indexed subcarriers, S2 corresponds to even-numbered set of subcarriers, and l1 is greater than l0, for example, the value is 6.

The transmitting end configures a precoding matrix P1, P2, … PK independently in each divided K REGs, processes the modulated data in the ith REG by precoding Pi, maps the processed data to a transmitting antenna and transmits the data to the receiving end, wherein i is 1, …, K.

Processing on the receiving side:

the receiving end receives the data sent by the sending end and the indication of the cyclic prefix information of the sub-frame, and divides the PRB pair into K REG groups according to the indication of the cyclic prefix information of the sub-frame, and the dividing method is the same as the method described by the sending end, and the description is not repeated here.

It should be noted that, the sending end may transmit the K value to the receiving end through the high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter signaling, and the receiving end may also determine the number K of REGs according to the received high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter configuration signaling or a default configuration, instead of determining the number K of REGs according to the cyclic prefix information indication of the subframe.

And the receiving end carries out channel estimation on the RE in the ith REG group Gi, carries out data detection on the data carried by the RE in the REG according to the estimated channel and demodulates the data to obtain the data in the REG. The channel estimation is based on DMRS, and the precoding of the DMRS is the same as the precoding used in REG, and is Pi, i is 1, …, K.

In this embodiment, further, the sending end may transmit, through a high-layer signaling or a physical-layer signaling, REG granularity feedback channel state information enabling information to tell a user whether to perform channel state information feedback based on the granularity of the REG, the receiving end receives the REG granularity feedback channel state information enabling information carried by the sending end in the high-layer or physical-layer signaling, if the information is enabled, the user feeds back the channel state information based on the granularity of the REG if the receiving end requires the REG granularity feedback channel state information, otherwise, the channel state information is fed back according to the granularity corresponding to the feedback mode configured by the sending end.

In this embodiment, the sending end may transmit data or ePDCCH in the REG, or other information after precoding processing, and the processing procedure of the sending end is consistent with the data transmission procedure in the embodiment, which is not described here again.

It should be noted that, in the present embodiment, the case of dividing K REG groups into one PRB pair is also applicable to the case of dividing M PRB pairs into K REG groups, but in the embodiment, 1 PRB pair is changed into M PRB pairs, 12 carriers in the frequency domain are changed into M × 12 carriers, and M × 12 carriers are grouped and REG-divided. This will not be repeated here.

Embodiment 2 partitioning REGs based on subframe type information

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 bandwidth used by the system is Nb PRB pairs, each of which is a set S of resource elements REs, comprising Nc subcarriers and Ns OFDM/OFDMA symbols, which includes M REs. For example, under the condition of a normal cyclic prefix and a carrier spacing of 15K, a PRB pair of LTE/LTE a includes Nc ═ 12 subcarriers, Ns ═ 14 regions of OFDM symbols, including 168 REs, and under an extended cyclic prefix subframe or a TDD special subframe, the number of OFDM symbols may take different values, and the number of subcarriers under different carrier spacings is different, but does not affect the application of the method of this embodiment. In 168 REs in the PRB pair, REs corresponding to CFI symbols are used for transmitting a Physical Downlink Control Channel (PDCCH), and symbols of CFI + 1-Ns are used for transmitting physical downlink data. In this embodiment, a transmitting end transmits data to a receiving end in Nb1 PRB pairs and transmits demodulation reference pilots DMRSs, and a user performs channel estimation using the DMRSs, estimates a channel of a data region according to the estimated channel, performs data detection, and demodulates the channel. This process is described in detail as follows:

for the sending end:

the transmitting end divides the REs in each PRB pair into K Resource Element Groups (REGs) G1, G2, …, and GK, each Group includes M1, M2, …, MK REs, and one RE in the same PRB pair belongs to and only belongs to one REG Group, that is, the REs of any two different REG groups are different.

Here, the transmitting end divides each PRB pair in the transmission resource into K resource element groups REG according to subframe type information, where the subframe type information includes DwPTS of a normal subframe and TDD special subframe. For example, a division method under the condition that the downlink control signal comprises l0 OFDM symbols is as follows:

in a normal subframe of a normal cyclic prefix, a PRB pair region is divided into 3 REGs, wherein 12 subcarriers are occupied in a frequency domain, OFDM symbols with indexes of l 0-13 in a data region are divided into three sets C1, C2 and C3 in a time domain, the three sets correspond to 3 REGs respectively, and for example, REs with an OFDM symbol index of l1 are 1 REG, REs with l belonging to C2 are one REG, REs with l belonging to C3 are one REG, and the three sets are G1, G2 and G3 respectively. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time-domain frequency-domain joint division, where, at a carrier index k of S1, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, symbol index l of C3 is one REG, at a carrier index k of S2, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, and symbol index l of C3 is one REG. Here, the division into 3 in the time domain is just exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers. Here, the symbol indexes corresponding to C1 are L0 to L1, the symbol indexes corresponding to C2 are L1+1 to L2, and the symbol indexes corresponding to C3 are L2+1 to L-1, where L is the total number of symbols included in a PRB pair, and is here 14.

Under the special subframe DwPTS of the normal cyclic prefix, the special subframe types are 9, and are set through a TDD-Config- > specific subframe patterns field of higher layer signaling. The number of DwPTS for each type is shown in table 4.

TABLE 4

There are 11 or more OFDM symbols in which {3,4,8} is arranged, and their corresponding frame structures are shown in fig. 7, and 9 or more OFDM symbols in which {1,2,6,7} is arranged, and their corresponding frame structures are shown in fig. 8.

The PRB pair region is divided into 2 REGs, where 12 subcarriers are occupied in the frequency domain, and OFDM symbols with index 2 to L of the data region are divided into 2 sets C1 and C2 in the time domain, such as OFDM symbol index L0 to L1 are C1, L1+1 to L-1 are C2, where L1 ═ ceil ((L-L0)/2), ceil is a function of the above integer. Wherein, the RE corresponding to the C1 symbol is one REG, and the RE corresponding to the C2 symbol is one REG, which are G1 and G2, respectively. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time domain and frequency domain joint division, where, at a carrier index k of S1, a RE with symbol index l belonging to C1 in the time domain is 1 REG, and a RE with symbol index l belonging to C1 in the time domain is one REG; at carrier index k of S2, RE whose symbol index l belongs to C1 in time domain is 1 REG, and RE whose symbol index l belongs to C1 is one REG. Here, the division into 2 in the time domain is merely exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers.

Processing on the receiving side:

the receiving end receives the data and the subframe type information indication sent by the sending end, and divides the PRB pair into K REG groups according to the subframe type information indication, and the dividing method is the same as the method described by the sending end, and the description is not repeated here.

It should be noted that, the sending end may transmit the K value to the receiving end through the high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter signaling, and the receiving end may also determine the number K of REGs according to the received high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter configuration signaling or a default configuration, instead of determining the number K of REGs according to the subframe type information indication.

Embodiment 3 partitioning REGs based on channel State information

for the sending end:

Here, the transmitting end divides each PRB pair in the transmission resource into K resource element groups REG according to channel state information, which includes the number of data layers or the channel rank. For example, a division method under the condition that the downlink control signal comprises l0 OFDM symbols is as follows:

under a normal cyclic prefix subframe, the number of data layers of a channel or the channel rank is less than L1, for example, L1 takes a value of 3, and the like, a PRB pair region is divided into 3 REGs, where 12 subcarriers are occupied in the frequency domain, OFDM symbols with indexes of L0 to 13 in the data region are divided into three sets C1, C2, and C3, which respectively correspond to 3 REGs, and for example, a RE with an OFDM symbol index L belonging to C1 is 1 REG, a RE with an index L belonging to C2 is one REG, and a RE with an index L belonging to C3 is one REG, which is G1, G2, and G3, respectively. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time-domain frequency-domain joint division, where, at a carrier index k of S1, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, symbol index l of C3 is one REG, at a carrier index k of S2, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, and symbol index l of C3 is one REG. Here, the division into 3 in the time domain is just exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers. Here, symbol indexes corresponding to C1 are L0 to L1, symbol indexes corresponding to C2 are L1+1 to L2, and symbol indexes corresponding to C3 are L2+1 to L-1, where L is the total number of symbols included in a PRB pair, where the value is 14, and L1 is smaller than L2, and preferably, the values are such that the numbers of elements in sets C1, C2, and C3 are different by one.

Under a normal cyclic prefix subframe, the number of data layers of a channel or the channel rank is greater than or equal to L1, for example, L1 takes a value of 3, and the like, REGs are divided in a frequency domain, for example, carrier index k is divided into two sets S1 and S2, where S1 is 0-5 and S2 is 6-11, then the RE corresponding to carrier index set S1 is divided into one REG, and the RE corresponding to carrier index set S2 is one REG. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers. Of course, here, REGs may also be divided by symbols in the time domain, in a similar manner to embodiments 1 and 2.

Processing on the receiving side:

the receiving end receives the data and the channel state information indication sent by the sending end, and divides the PRB pair into K REG groups according to the channel state information indication, and the dividing method is the same as the method described above for the sending end, and will not be described here again.

It should be noted that, the sending end may transmit the K value to the receiving end through the high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter signaling, and the receiving end may also determine the number K of REGs according to the received high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter configuration signaling or a default configuration, instead of determining the number K of REGs according to the channel state information indication.

Embodiment 4 partitioning REGs based on PCFICH information

for the sending end:

Here, the sending end divides each PRB pair in the transmission resource into K resource element groups REG according to the physical control format indicator channel information of the physical downlink control channel, where the information carried by the PCFICH is CFI, whose value is CFI ═ 1,2,3, the number of corresponding control symbols is CFI when the bandwidth is greater than 10 PRB pairs, and otherwise, it is CFI + 1. For example, when the downlink transmission bandwidth is greater than 10 PRB pairs, a method for dividing REGs is as follows:

in a normal frame of a normal cyclic prefix, the CFI is 2, the PRB pair region is divided into 3 REGs, where 12 subcarriers are occupied in the frequency domain, and OFDM symbols with data region indexes of 2 to 13 are divided into 3 REGs in the time domain, for example, RE with OFDM symbol index l of 2 to 5 is 1 REG, RE with l of 6 to 9 is one REG, RE with l of 10 to 13 is one REG, G1, G2, and G3, respectively, where each RE has 48 REs. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time domain and frequency domain joint division, wherein on the condition that a carrier index k is S1, RE with symbol indexes l of 2-5 on the time domain is 1 REG, RE with symbol indexes l of 6-9 is one REG, RE with symbol indexes l of 10-13 is one REG, on the condition that the carrier index k is S2, RE with symbol indexes l of 2-5 on the time domain is 1 REG, RE with symbol indexes l of 6-9 is one REG, and RE with symbol indexes l of 10-13 is one REG. Here, the division into 3 in the time domain is just exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers.

In a normal frame of a normal cyclic prefix, the CFI is 3, the PRB pair region is divided into 3 REGs, where 12 subcarriers are occupied in the frequency domain, and OFDM symbols with indexes of 3 to 13 in the data region are divided into 3 REGs in the time domain, for example, RE with index l of 3 to 13 in the OFDM symbol is 1 REG, RE with index l of 6 to 9 is one REG, RE with index l of 10 to 13 is one REG, G1, G2, and G3, respectively, where there are 36, 48, and 48 REs in each. I.e. the number of REs of the first REG is less than the number of the other two REGs. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time domain and frequency domain joint division, wherein on the condition that a carrier index k is S1, RE with symbol indexes l of 3-5 on the time domain is 1 REG, RE with symbol indexes l of 6-9 is one REG, RE with symbol indexes l of 10-13 is one REG, on the condition that the carrier index k is S2, RE with symbol indexes l of 3-5 on the time domain is 1 REG, RE with symbol indexes l of 6-9 is one REG, and RE with symbol indexes l of 10-13 is one REG. Here, the division into 3 in the time domain is just exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers.

Processing on the receiving side:

the receiving end receives the data and the PCFICH sent by the sending end, and divides the PRB pair into K REG groups according to the CFI of the PCFICH, and the dividing method is the same as the method described above for the sending end, and will not be described here again.

It should be noted that, the sending end may transmit the K value to the receiving end through the high-layer precoding granularity parameter configuration signaling or the physical layer precoding granularity parameter signaling, and the receiving end may also determine the number K of REGs according to the received high-layer precoding granularity parameter configuration signaling or the physical layer precoding granularity parameter configuration signaling or a default configuration, instead of determining the number K of REGs according to the CFI of the PCFICH.

Embodiment 5 partitioning REGs based on slot index information

for the sending end:

the transmitting end divides the REs in each PRB pair into K resource element groups REG G1, G2, …, GK, each group includes M1, M2, …, MK REs, and one RE in the same PRB pair belongs to and only belongs to one REG group, that is, REs of any two different REG groups are different.

Here, the sending end divides each PRB pair in the transmission resource into K resource element groups REG according to the slot index information, and the sending end can obtain which subframes in the LTE/LTE a frame have a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) according to the slot index information, for example, in the TDD system, the PSS is sent on the third OFDM symbols of subframe 1 and subframe 6; in the FDD system, the PSS is transmitted on the last OFDM symbol of the first slot of the subframe 5 and the subframe 0; the SSS and the PSS are transmitted on the same slot of the same subframe, but the SSS is positioned on the second last OFDM symbol and is one OFDM symbol ahead of the PSS. For example, a division method under the condition that the downlink control signal comprises l0 OFDM symbols is as follows:

under a normal frame with a normal cyclic prefix, whether PSS or SSS information is carried or not is determined according to a TDD or FDD system and a slot index, for the condition that a PRB carrying no PSS or SSS is not carried, a PRB pair region is divided into 3 REGs, wherein 12 subcarriers are occupied in a frequency domain, OFDM symbols with the index of a data region being l 0-13 are divided into three sets C1, C2 and C3 in a time domain, the three sets C1, C2 and C3 respectively correspond to the 3 REGs, for example, RE with the index of the OFDM symbols l belonging to C1 is 1 REG, RE with l belonging to C2 is one REG, RE with l belonging to C3 is one REG, and RE with G1, G2 and G3 are respectively. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time-domain frequency-domain joint division, where, at a carrier index k of S1, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, symbol index l of C3 is one REG, at a carrier index k of S2, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, and symbol index l of C3 is one REG. Here, the division into 3 in the time domain is just exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers. Here, symbol indexes corresponding to C1 are L0 to L1, symbol indexes corresponding to C2 are L1+1 to L2, and symbol indexes corresponding to C3 are L2+1 to L-1, where L is the total number of symbols included in a PRB pair, where the value is 14, and L1 is smaller than L2, and preferably, the values are such that the numbers of elements in sets C1, C2, and C3 are different by one.

Under a normal frame with a normal cyclic prefix, whether PSS or SSS information is carried or not is determined according to a TDD or FDD system and a slot index, if the PSS or SSS information is carried, OFDM symbols are divided into 2 sets C1 and C2, a PRB pair region is divided into 2 REGs, wherein 12 subcarriers are occupied in a frequency domain, a RE corresponding to a symbol index l of a data region in a set C1 in a time domain is an REG, and a RE corresponding to the symbol index l in a set C2 is an REG which is G1 and G2 respectively. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time domain and frequency domain joint division, where, at a carrier index k of S1, a RE with symbol index l belonging to C1 in the time domain is 1 REG, and a RE with symbol index l belonging to C1 in the time domain is one REG; at carrier index k of S2, RE whose symbol index l belongs to C1 in time domain is 1 REG, and RE whose symbol index l belongs to C1 is one REG. Here, the division into 2 in the time domain is merely exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers.

Here, the division of the C1 and C2 sets has some differences according to the difference of the system and the difference of the slot indexes. For example, in the TDD system, for a slot index of 2 or 3 (corresponding to subframe 1), or 10 and 11 (corresponding to subframe 6), in the third symbol of slot 2 and slot 10, there are PSS signals for 6 PRB pairs near the center carrier frequency, and at this time, the subframe is a special subframe, and for different subframe type configurations, there are different numbers of DwPTS symbols. Assume that the number of symbols is L. Then the symbol index included by C1 is L0-L1, the carrier index of C2 includes L1+ 1-L-1, the value of L1 makes the maximum difference of 1 between the element numbers of C1 and C2, L0 is CFI or CFI +1, where L is the symbol number of PRB pairs and is 8-12, and CFI is the symbol number of control regions and is 1-3. When the slot index in the TDD system is 0 or 1 (corresponding to subframe 0), or 8 and 9 (corresponding to subframe 5), in the last symbol of slot 1 and slot 9, there are SSS signals in 6 PRB pairs near the center carrier frequency, at this time, assuming that the number of symbols is L (for example, 12 or 14), the symbol index corresponding to C1 is L0 to L1, and the symbol index corresponding to C2 is L1+1 to L-2, where L1 takes a value such that the maximum difference between the numbers of elements of C1 and C2 is 1, and L0 is CFI or CFI + 1. In an FDD system, similarly, when a slot index is 0 or 1 (corresponding to subframe 0), or 8 and 9 (corresponding to subframe 5), a last-but-one symbol of a first slot of 6 PRB pairs near a center carrier frequency is PSS, a last-but-one symbol is SSS, and assuming that the number of symbols is L (for example, 12 or 14), symbol indexes corresponding to C1 are L0 to L1, and symbol indexes corresponding to C2 are L1+1 to L-3, where L1 takes a value such that the numbers of elements of C1 and C2 are maximally different by 1, and L0 is CFI or CFI + 1.

Processing on the receiving side:

the receiving end receives the data and the slot index information sent by the sending end, and divides the PRB pair into K REG groups according to the slot index information, and the dividing method is the same as the method described above for the sending end, and is not described here again.

It should be noted that the sending end may transmit the K value to the receiving end through the high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter signaling, and the receiving end may also determine the number K of REGs according to the received high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter configuration signaling or a default configuration, instead of determining the number K of REGs according to the slot index information.

Embodiment 6 partitioning REGs based on System Bandwidth size information

for the sending end:

Here, the sending end divides each PRB pair in the transmission resource into K resource element groups REG according to system bandwidth size information, where the system bandwidth size information may affect the size of a downlink control symbol region, the number of control symbols corresponding to PRB pairs whose bandwidth is greater than 10 is CFI, otherwise, CFI +1, where CFI is information carried by PCFICH, and its value is CFI 1,2, and 3. For example, one method for dividing REGs is as follows:

under a normal frame of a normal cyclic prefix, a system bandwidth is greater than 10 PRB pairs, a PRB pair region is divided into 3 REGs, where 12 subcarriers are occupied in a frequency domain, OFDM symbols with indexes l 0-13 of a data region are divided into three sets C1, C2, and C3 in a time domain, and the three sets correspond to 3 REGs, respectively, and for example, a RE with an OFDM symbol index l belonging to C1 is 1 REG, a RE with an index l belonging to C2 is one REG, and a RE with an index l belonging to C3 is one REG, and is G1, G2, and G3, respectively. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time-domain frequency-domain joint division, where, at a carrier index k of S1, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, symbol index l of C3 is one REG, at a carrier index k of S2, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, and symbol index l of C3 is one REG. Here, the division into 3 in the time domain is just exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers. Here, symbol indexes corresponding to C1 are L0 to L1, symbol indexes corresponding to C2 are L1+1 to L2, symbol indexes corresponding to C3 are L2+1 to L-1, where L is the total number of symbols included in a PRB pair, where the value is 14, where L1 is smaller than L2, and preferably, the values are such that the number of elements in sets C1 and C2, C3 is one of the largest differences, where L0 is CFI.

Under a normal frame of a normal cyclic prefix, a system bandwidth is less than or equal to 10 PRB pairs, at this time, the number of symbols of a downlink control region is CFI +1, the PRB pair region is divided into 3 REGs, where 12 subcarriers are occupied in a frequency domain, OFDM symbols with indexes of l 0-13 in a data region are divided into three sets C1, C2, and C3, which respectively correspond to 3 REGs, and for example, an RE with an OFDM symbol index of l belonging to C1 is 1 REG, an RE with l belonging to C2 is one REG, and an RE with l belonging to C3 is one REG, and is G1, G2, and G3. Certainly, the REG may also be divided in the frequency domain, for example, the carrier index k is divided into two sets S1 and S2, where S1 is 0 to 5 and S2 is 6 to 11, then the RE corresponding to the carrier index set S1 is divided into one REG, and the RE corresponding to the carrier index set S2 is one REG. Or time-domain frequency-domain joint division, where, at a carrier index k of S1, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, symbol index l of C3 is one REG, at a carrier index k of S2, RE with symbol index l of C1 in the time domain is 1 REG, RE with symbol index l of C2 is one REG, and symbol index l of C3 is one REG. Here, the division into 3 in the time domain is just exemplified, and similar results can be obtained for the division into other K values. Similar results can be obtained for the case of subcarrier dispersion, such as dividing the subcarriers into two sets S1 and S2, S1 corresponding to odd indexed subcarriers, and S2 corresponding to even set subcarriers. Here, symbol indexes corresponding to C1 are L0 to L1, symbol indexes corresponding to C2 are L1+1 to L2, symbol indexes corresponding to C3 are L2+1 to L-1, where L is the total number of symbols included in a PRB pair, where the value is 14, where L1 is smaller than L2, and preferably, the values are such that the maximum difference between the numbers of elements in sets C1 and C2, C3 is one, and L0 is CFI + 1.

Processing on the receiving side:

the receiving end receives the data and the system bandwidth size information indication sent by the sending end, and divides the PRB pair into K REG groups according to the system bandwidth size information indication, and the dividing method is the same as the method described above for the sending end, and will not be described here again.

It should be noted that, the sending end may transmit the K value to the receiving end through the high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter signaling, and the receiving end may also determine the number K of REGs according to the received high-layer pre-coding granularity parameter configuration signaling or the physical layer pre-coding granularity parameter configuration signaling or a default configuration, instead of determining the number K of REGs according to the system bandwidth size information indication.

Embodiment 7 partitioning REGs based on Transmission Bandwidth size information

for the sending end:

Here, the sending end determines the value of K according to the size of the transmission bandwidth. The transmission bandwidth is divided into T sets Si, the number of RB included in the set Si_RBValue range of t_i-1+1≤N_RB≤t_iAnd its corresponding value of K is K_iWherein, t_iIs an increasing integer, and

t

₀0,1, …, T. Then, when the number of RBs of the bandwidth transmitted by the transmitting end belongs to the set Si, the transmitting end needs to divide one PRB into K_iAnd each REG.

The sending end determines the number K of REGs into which PRB pairs are divided according to the number of RBs for transmitting data, and then divides the PRB pairs into K parts, or may further divide the PRB pairs into K REGs according to at least one of cyclic prefix information, subframe type information, channel state information, and physical control format indicator channel PCFICH information of a physical downlink control channel, slot index information, system bandwidth size information, and the like, according to the methods of embodiments 1 to 6.

Processing on the receiving side:

the receiving end receives the data and the system bandwidth size information indication sent by the sending end, and divides the PRB pair into K REG groups according to the transmission bandwidth size information indication, and the dividing method is the same as the method described above for the sending end, and will not be described here again.

Example 8 partitioning REGs based on feedback patterns

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 bandwidth used by the system is Nb PRB pairs, each of which is a set S of resource elements REs, comprising Nc subcarriers and Ns OFDM/OFDMA symbols, which includes M REs. For example, under the condition of a normal cyclic prefix and a carrier spacing of 15K, a PRB pair of LTE/LTE a includes Nc ═ 12 subcarriers, Ns ═ 14 regions of OFDM symbols, including 168 REs, and under an extended cyclic prefix subframe or a TDD special subframe, the number of OFDM symbols may take different values, and the number of subcarriers under different carrier spacings is different, but does not affect the application of the method of this embodiment. In 168 REs in the PRB pair, REs corresponding to CFI symbols are used for transmitting a Physical Downlink Control Channel (PDCCH), and symbols of CFI + 1-Ns are used for transmitting physical downlink data.

In this embodiment, the feedback mode takes periodic feedback (Physical Uplink control channel, PUCCH) and aperiodic feedback (Physical Uplink Shared channel, PUSCH) in LTE/LTE a as examples, where the feedback mode refers to a command combination of CSI (CQI/PMI/RI) feedback, and includes subband feedback and wideband feedback or selects M subband feedback, and the like, including periodic feedback and aperiodic feedback. Wherein, the aperiodic feedback is transmitted in the PUSCH and includes the mode as shown in table 5.

TABLE 5

The periodic feedback mode refers to a mode of feeding back in PUCCH periodically, and includes modes as shown in table 6.

TABLE 6

In this embodiment, a transmitting end transmits data to a receiving end in Nb1 PRB pairs and transmits demodulation reference pilots DMRSs, and a user performs channel estimation using the DMRSs, estimates a channel of a data region according to the estimated channel, performs data detection, and demodulates the channel. This process is described in detail as follows:

for the sending end:

Here, the sending end determines the value of K according to the feedback mode. In the Mode requiring feedback of PMI, for example, in modes 1-1 and 2-1 of PUCCH, modes 3-1, 1-2, 2-2 of PUSCH, and 3-2 of Mode, K is determined to be K1, and in the Mode not requiring feedback of PMI, for example, in modes 1-0 and 2-0 of PUCCH, and 2-0 of PUSCH, and 3-0 of Mode, K is determined to be K2, then K2> K1, and generally, K1 is 1, that is, in the Mode requiring feedback of PMI, PBR REG is not divided. Whereas in the feedback mode where PMI feedback is not required, K2 is typically greater than 1, requiring the PRB pair to be divided into multiple REGs for transmitting data. When the feedback Mode is Mode 1-0, K is K21, when Mode 2-0, K is K22, and when Mode 3-0 of PUSCH, K is K23, so that K21 ═ K22 ═ K23 is generally used.

The sending end determines the number K of REGs into which the PRB is divided according to the transmission mode according to the method described above, and then divides the PRB into K parts, or may further divide the PRB into K REGs according to at least one of cyclic prefix information, subframe type information, channel state information, physical control format indicator channel PCFICH information of a physical downlink control channel, slot index information, system bandwidth size information, and the like according to the methods of embodiments 1 to 6.

Processing on the receiving side:

the receiving end receives the data and the feedback mode information indication sent by the sending end, and divides the PRB pair into K REG groups according to the feedback mode information indication, and the dividing method is the same as the method described above for the sending end, and is not described here again.

In this embodiment, when K is 1, the PRB pair does not need to be divided into multiple REGs, and the processing aspects of the transmitting end and the receiving end are consistent with the conventional procedure.

Example 9 partitioning REGs based on Transmission Pattern

In this embodiment, the Transmission modes include Transmission Mode (TM Mode) in LTE/LTE a and TM1 to TM10, where TM1 is single antenna port Transmission (port 0 is used) and is applied to the case of single antenna Transmission. TM2 is a transmit diversity mode, and is suitable for a situation where a cell edge channel is relatively complex and interference is large, and also for a situation where the UE moves at a high speed. 2 or 4 antenna ports are used. Transmit diversity is the default multi-antenna transmission mode. The same data is sent on different antennas to realize data redundancy, so that the SINR is improved, and the transmission is more reliable. TM3 is open-loop space division multiplexing with large delay diversity and is suitable for a scene of high-speed movement of UE; 2 or 4 antenna ports are used. TM4 is closed-loop spatial multiplexing, is suitable for occasions with better channel conditions and is used for providing higher data transmission rate; 2 or 4 antenna ports are used. TM5 is an MU-MIMO transmission mode and is mainly used for improving the capacity of a cell; 2 or 4 antenna ports are used. TM6 is Rank 1 transmission, mainly applicable to cell edge situations; 2 or 4 antenna ports are used. The TM7 is single-stream beamforming, is mainly suitable for UE at the edge of a cell, can effectively resist interference, and only uses port 5. TM8 is dual-stream beamforming, and may be used for UE at the cell edge, and also for other scenarios. Using port 7 and port 8, each port corresponds to one UE-specific reference signal, and these 2 reference signals are distinguished by 2 orthogonal occ (orthogonal cover code). Under spatial multiplexing, the 2 OCCs and corresponding reference signals are used for transmission of the 2 layers. TM9 supports up to 8 layers of transmission, mainly to increase the data transmission rate. Ports 7-14 are used. TM10 is a mode to support COMP.

for the sending end:

Here, the transmitting end determines the value of K according to the transmission mode. When the transmission mode is TM1 to TM8, the value of K is determined to be K1, and when TM9 and TM10, the value of K is determined to be K2, then K1< ═ K2, and generally K1 is 1, i.e., when TM1 to TM8, PRB pairs do not need to be divided into multiple REGs, whereas when the transmission mode is TM9 and TM10, if PMI disabling is enabled, i.e., feedback is not needed, even if open-loop MIMO is used, K21 is determined, when PMI disabling is not enabled, K21> K22 is determined, and generally K22 is 1, i.e., when closed-loop MIMO that requires feedback of PMI, PRB pairs do not need to be divided into multiple REGs.

The sending end determines the number K of the PRBs into the REGs according to the transmission mode and the determined method, and then divides the PRBs into K parts, or may further divide the PRB pairs into K REGs according to at least one of cyclic prefix information, subframe type information, channel state information, and physical control format indicator channel PCFICH information of a physical downlink control channel, slot index information, system bandwidth size information, and the like according to the methods of embodiments 1 to 6.

Processing on the receiving side:

the receiving end receives the data and the transmission mode information indication sent by the sending end, and divides the PRB pair into K REG groups according to the transmission mode information indication, and the dividing method is the same as the method described above for the sending end, and will not be described here again.

Embodiment 10 partitioning REGs based on feedback type

In this embodiment, the feedback type refers to the measurement of channel information and the feedback category, and there are two types: class a and Class B, respectively.

Class A: the base station sends CSI-RS (channel state information-reference signal), which is generally non-precoded pilot frequency, and the UE directly carries out channel measurement and CSI quantization based on the CSI-RS pilot frequency to obtain RI/PMI/CQI. The contents are fed back on PUCCH or PUSCH, the feedback contents are more, and the beam direction of the broadband is included

Class B: the CSI-RS sent by the base station is generally a precoded pilot, and the UE may first select the precoded pilot, or select a resource set of the precoded pilot, or select a port group, and then perform quantization feedback of channel information based on the selected subset, including subset selection information and RI/PMI/CQI information corresponding to the selected CSI-RS measurement resource subset;

for the sending end:

Here, the transmitting end determines the number K of the divided REGs according to feedback categories, where in Class a, K is determined to be K1, and in Class b, K is determined to be K2, then there are generally K2> K1, and K1 is generally 1.

After determining the value of K according to the feedback category and the method, the transmitting end divides the PRB pairs into K parts, or may further divide the PRB pairs into K REGs according to at least one of cyclic prefix information of a subframe, subframe type information, channel state information, physical control format indicator channel PCFICH information of a physical downlink control channel, slot index information, system bandwidth size information, and the like according to the methods of embodiments 1 to 6.

Processing on the receiving side:

the receiving end receives the data and the feedback type information indication sent by the sending end, and divides the PRB pair into K REG groups according to the feedback type information indication, and the dividing method is the same as the method described above for the sending end, and the description is not repeated here.

Example 11 partitioning REGs based on PMI disable

In this embodiment, Precoding Matrix index (PMI disablinking) refers to whether UE reports a Precoding index of MIMO when reporting CSI in a MIMO system, for example, in a scenario where open-loop spatial multiplexing, spatial diversity, or TDD obtains a downlink channel by using reciprocity of an uplink channel, or a scenario where a feedback mode is X-0, or in which the feedback of PMI by the UE is not required, so that PMI disablinking enabling can be performed, thereby saving feedback overhead.

for the sending end:

Here, the sending end determines the value of K according to PMI disablingung. When PMI disabling is enabled, K is determined to be K1, when PMI disabling is enabled, K is determined to be K2, and when the transmission mode is TM9 or TM10, K2> K1, and generally K1 is 1, i.e., it is not necessary to divide the PRB pair into K REGs.

After determining the number K of the PRBs into the REGs according to the PMI disabling and the method described above, the transmitting end divides the PRB into K parts, or may further divide the PRB into K REGs according to at least one of cyclic prefix information, subframe type information, channel state information, physical control format indicator channel PCFICH information of a physical downlink control channel, slot index information, system bandwidth size information, and the like of the subframe according to the methods of embodiments 1 to 6.

Processing on the receiving side:

the receiving end receives data and PMI disabling information indication sent by the sending end, and divides the PRB pair into K REG groups according to the PMI disabling information indication, and the dividing method is the same as the method described by the sending end, and the description is not repeated here.

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 physical resource block PRB pairs into K resource unit groups REG, wherein M and K are positive integers, and M is smaller than K;

s12, information is transmitted using independent precoding on the K REGs, respectively.

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

s21, receiving information transmitted by M PRB pairs;

s22, dividing the PRB pair into K REGs, wherein M and K are positive integers, and M is smaller than K;

s23, channel estimation and/or detection of information on the REGs are performed on the K REGs independently using DMRSs.

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-S23 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 physical resource block PRB pairs into K resource unit groups REG;

transmitting information by using independent precoding on the K REGs respectively, wherein M and K are positive integers, and M is smaller than K;

dividing the M PRB pairs into K REGs, including at least one of:

dividing the M PRB pairs into K REGs according to the cyclic prefix information of the subframes where the M PRB pairs are located;

dividing the M PRB pairs into K REGs according to the subframe type information of the subframes where the M PRB pairs are located;

dividing the M PRB pairs into K REGs according to channel state information;

dividing the M PRB pairs into K REGs according to the PCFICH information of the physical control format indicator channel of the physical downlink control channel;

dividing the M PRB pairs into K REGs according to slot index information;

dividing the M PRB pairs into K REGs according to a feedback mode;

dividing the M PRB pairs into K REGs according to a transmission mode;

dividing the M PRB pairs into K REGs according to PMIdiscombing;

dividing the M PRB pairs into K REGs according to CSI feedback categories.

2. The method of claim 1, wherein the subframe type information comprises, when the M PRB pairs are divided into K REGs according to the subframe type information of the subframe in which the M PRB pairs are located:

DwPTS type information and/or normal subframe type information of the TDD special subframe, wherein the DwPTS type information is determined by special subframe configuration signaling.

3. The method of claim 1, further comprising:

transmitting the K through high layer signaling or physical layer signaling.

4. The method of claim 1, further comprising:

the REG granularity feedback channel state information enabling information is transmitted through high layer signaling or physical layer signaling.

5. The method of claim 1, wherein dividing the M PRB pairs into K REGs comprises:

dividing consecutive REs into one REG; alternatively, the first and second electrodes may be,

discrete REs are divided into one REG.

6. The method of any of claims 1 to 5, wherein the information comprises: data and/or control channel information.

7. The method according to any one of claims 1 to 5, wherein the REG comprises: n1 OFDM/OFDMA symbols and a set of REs corresponding to M1 subcarriers, where N1 is smaller than the number of symbols of M PRB pairs where REGs are located, and M1 is smaller than the number of subcarriers of M PRB pairs where REGs are located.

8. A method for receiving information, comprising:

receiving information transmitted by M physical resource block PRB pairs;

dividing the M PRB pairs into K Resource Element Groups (REGs), wherein M and K are positive integers, and M is smaller than K;

performing channel estimation and/or detecting information on the REGs on the K REGs independently by using demodulation reference pilots respectively;

wherein dividing the M PRB pairs into K resource element groups REG includes at least one of:

dividing the M PRB pairs into K REGs according to the indication of the received cyclic prefix information of the subframe;

dividing the M PRB pairs into K REGs according to the subframe type information of the received subframe;

dividing the M PRB pairs into K REGs according to the received channel state information indication;

dividing the M PRB pairs into K REGs according to the received Physical Control Format Indicator Channel (PCFICH) information of the physical downlink control channel;

dividing the M PRB pairs into K REGs according to slot index information;

dividing the M PRB pairs into K REGs according to the received system bandwidth size information;

dividing the M PRB pairs into K REGs according to the received transmission bandwidth size information

Dividing the M PRB pairs into K REGs according to a feedback mode;

dividing the M PRB pairs into K REGs according to a transmission mode;

dividing the M PRB pairs into K REGs according to PMIdiscombing;

dividing the M PRB pairs into K REGs according to CSI feedback categories.

9. The method of claim 8, wherein the subframe type information comprises DwPTS type information of a TDD special subframe and/or normal subframe type information, and wherein the DwPTS type information is determined by special subframe configuration signaling, when the M PRB pairs are divided into K REGs according to the subframe type information of a received subframe.

10. The method of claim 8, further comprising:

receiving REG granularity feedback channel state information enabling information through received high-layer signaling or physical layer signaling;

and judging whether the granularity feedback channel state information specified according to the traditional method is required or not according to the REG granularity feedback channel state information enabling information.

11. The method of claim 8, further comprising:

determining the number K of REGs according to the received high-level signaling or physical layer precoding granularity parameter configuration signaling;

alternatively, the first and second electrodes may be,

and determining the number K of the REGs according to the default value of the pre-coding granularity parameter configuration appointed by the sending end and the receiving end.

12. The method of claim 8, wherein dividing the PRB pair into K Resource Element Groups (REGs) comprises:

discrete REs are divided into one REG.

13. The method according to any of claims 8 to 12, wherein the information comprises: data and/or control channel information.

14. The method according to any of claims 8 to 12, wherein the REG comprises: and a set of Resource Elements (REs) corresponding to N1 OFDM/OFDMA symbols and M1 subcarriers, wherein N1 is smaller than the number of symbols of the PRB pair where REG is located, and M1 is smaller than the number of subcarriers of the PRB pair where REG is located.

15. An apparatus for transmitting information, comprising:

a first dividing module, configured to divide M physical resource block PRB pairs into K resource element groups REG;

a transmission module, configured to transmit information using independent precoding on the K REGs, where M and K are positive integers, and M is smaller than K;

wherein the first partitioning module comprises at least one of:

a first dividing unit, configured to divide the M PRB pairs into K REGs according to cyclic prefix information of subframes where the M PRB pairs are located;

a second dividing unit, configured to divide the M PRB pairs into K REGs according to subframe type information of subframes in which the M PRB pairs are located;

a third dividing unit, configured to divide the M PRB pairs into K REGs according to channel state information;

a fourth dividing unit, configured to divide the M PRB pairs into K REGs according to PCFICH information of a physical control format indicator channel of a physical downlink control channel;

a fifth dividing unit, configured to divide the M PRB pairs into K REGs according to slot index information;

a sixth dividing unit, configured to divide the M PRB pairs into K REGs according to system bandwidth size information;

a seventh dividing unit, configured to divide the M PRB pairs into K REGs according to transmission bandwidth size information;

an eighth dividing unit, configured to divide the M PRB pairs into K REGs according to a feedback pattern;

a ninth dividing unit, configured to divide the M PRB pairs into K REGs according to a transmission mode;

a tenth dividing unit, configured to divide the M PRB pairs into K REGs according to pmdisable;

an eleventh dividing unit to divide the M PRB pairs into K REs according to CSI feedback categories.

16. An apparatus for receiving information, comprising:

the receiving module is used for receiving information transmitted by M physical resource block PRB pairs;

a second dividing module, configured to divide the M PRB pairs into K resource element groups REG, where M and K are positive integers and M is smaller than K;

a processing module, configured to perform channel estimation and/or information detection on the K REGs independently using demodulation reference pilots on the K REGs, respectively;

wherein the second partitioning module includes at least one of:

a twelfth dividing unit, configured to divide the M PRB pairs into K REGs according to a cyclic prefix information indication of a received subframe;

a thirteenth dividing unit, configured to divide the M PRB pairs into K REGs according to subframe type information of a received subframe;

a fourteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received csi indicator;

a fifteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received PCFICH information of the pdcch;

a sixteenth dividing unit, configured to divide the M PRB pairs into K REGs according to slot index information;

a seventeenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received system bandwidth size information;

an eighteenth dividing unit, configured to divide the M PRB pairs into K REGs according to the received transmission bandwidth size information;

a nineteenth dividing unit, configured to divide the M PRB pairs into K REGs according to a feedback pattern;

a twentieth dividing unit configured to divide the M PRB pairs into K REGs according to a transmission mode;

a twenty-first dividing unit, configured to divide the M PRB pairs into K REGs according to pmidibrating;

a twenty-second partitioning unit to partition the M PRB pairs into K REGs according to CSI feedback categories.