WO2017181996A1

WO2017181996A1 - Method of transmitting reference signal, receiving method, and associated apparatus

Info

Publication number: WO2017181996A1
Application number: PCT/CN2017/081460
Authority: WO
Inventors: 王婷; 李元杰
Original assignee: 华为技术有限公司
Priority date: 2016-04-22
Filing date: 2017-04-21
Publication date: 2017-10-26
Also published as: CN107306176B; CN107306176A

Abstract

The application discloses a method of transmitting a reference signal, a receiving method, and an associated apparatus. The method comprises: allocating resources to a first reference signal and a second reference signal, wherein in a resource mapping pattern of the first reference signal and second reference signal, N first resource elements are continuous and adjacent in the frequency domain and configured to be one group; and in the first resource elements carrying a symbol, an even number of second resource elements are present between an i^th group of the first resource elements and an (i+1)^th group of the first resource elements, an even number of second resource elements are present between a group of the first resource elements in a j^th resource block and a group of the first resource elements in a (j+1)^th resource block; the first resource elements carry at least one of the first reference signal and the second reference signal; and the second resource elements carry neither the first reference signal nor the second reference signal. The method can be implemented to configure a resource not carrying any reference signal to better satisfy requirements of SFBC transmission, increasing signal performance against interference.

Description

Method for transmitting reference signal, receiving method and related device

Technical field

The present application relates to the field of communications technologies, and in particular, to a method for transmitting a reference signal, a receiving method, a network side device, and a terminal device.

Background technique

Space Frequency Block Code (SFBC) is an anti-jamming technology in Long Term Evolution (LTE) systems. In the LTE standard, SFBC is adopted as the transmit diversity scheme of two antenna ports. The basic idea is that the information bits to be transmitted enter the space frequency encoder in units of two symbols after constellation mapping. For example, as shown in FIG. 1, for an SFBC system of two transmit antennas, assuming that the symbol streams of the input SFBC encoder are C1, C2, C1 and C2 are transmitted on the first subcarriers of antenna 1 and antenna 2, respectively, and antenna 1 is transmitted. And -C2* and C1* are transmitted on the second subcarrier of antenna 2. Where ()* denotes the conjugate of the complex number. An SFBC coding matrix can be expressed as follows:

The above expression indicates that the same SFBC coded block will occupy two adjacent subcarriers of two antenna transmit ports, and the adjacent two subcarriers of transmit antenna port 1 carry C1 and C2, and the adjacent of transmit antenna port 2 The two subcarriers carry -C2 ^* and C1 ^* .

However, it has been found that the current SFBC method is not fully utilized, and a data transmission method that fully adopts the SFBC method is needed.

Summary of the invention

The embodiment of the invention provides a method for transmitting a reference signal, a receiving method and a related device, which can realize that the resource without the reference signal can better satisfy the condition of the SFBC transmission and improve the anti-interference of the signal.

In a first aspect, an embodiment of the present invention provides a method for sending a reference signal, where the method includes:

Allocating resources for the first reference signal and the second reference signal, the first reference signal corresponding to the first antenna port of the first transmission point, and the second reference signal corresponding to the second antenna port of the second transmission point; In the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:

In a resource block, on a symbol carrying the first resource element, the first resource elements that are consecutively adjacent in the N frequency domains are a group; and the first resource element in the ith group adjacent to the frequency domain And an even number of second resource elements are separated from the first resource element of the (i+1)th group; the N, i are both positive integers;

And an even number of the second resource elements between a set of first resource elements of the jth resource block and a set of first resource elements of the j+1th resource block on a symbol carrying the first resource element The jth resource block and the j+1th resource block are adjacent in the frequency domain; the j is a positive integer;

Transmitting, by the first antenna port, the first reference signal to a terminal device on a resource element that is allocated to carry the first reference signal, and transmitting the resource element that is allocated to carry the second reference signal The second antenna port sends the second reference signal to the terminal device.

In a second aspect, an embodiment of the present invention provides a method for receiving a reference signal, where the method includes:

And receiving, by the resource mapping element of the first reference signal, a first reference signal by using a first antenna port corresponding to the first transmission point on the resource element carrying the first reference signal, and the resource mapping pattern according to the second reference signal is on the bearer Receiving, by the second antenna port corresponding to the second transmission point, the second reference signal on the resource element of the second reference signal;

In a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal:

And an even number of the second resource elements between a set of first resource elements of the jth resource block and a set of first resource elements of the j+1th resource block on a symbol carrying the first resource element The jth resource block is adjacent to the j+1th resource block in the frequency domain; the j is a positive integer.

In the embodiment of the present invention, the first resource element is a resource element that carries at least one of the first reference signal and the second reference signal. That is, the first resource element may carry the first reference signal or the second reference signal; the first resource element may carry both the first reference signal and the second reference signal. The second resource element is a resource element that does not carry the first reference signal and does not carry the second reference signal.

The foregoing first aspect and the foregoing second aspect describe a method for transmitting and receiving a reference signal according to an embodiment of the present invention from a network device side and a terminal device side, respectively, and implementing the method for transmitting and receiving the reference signal by using the method for transmitting and receiving the reference signal The resources of the reference signal can better meet the conditions of SFBC transmission and improve the anti-interference of the signal.

With reference to the first aspect or the second aspect, in some possible implementations, the interval between a group of first resource elements of the jth resource block and a group of third resource elements of the j+1th resource block The even number of the second resource elements may include:

An even number of second resource elements of the jth resource block and an even number of second resource elements of the j+1th resource block; or an odd number of second resource elements and a j+1th of the jth resource block An odd number of second resource elements in a resource block.

With reference to the first aspect or the second aspect, in a resource mapping manner of the embodiment of the present invention, the first resource element is a resource element that carries both the first reference signal and the second reference signal, that is, The resource mapping pattern of the first reference signal is the same as the resource mapping pattern of the second reference signal, so that system resources can be fully utilized.

In combination with the foregoing resource mapping manner, in a possible implementation manner, the N may be equal to 1, that is, a group of the first resource elements includes only one that carries the first reference signal and carries the The resource element of the second reference signal.

In combination with the foregoing resource mapping manner, in a possible implementation manner, the i-th first-numbered RB in the odd-numbered RB is in the carrier number and the even-numbered RB in the i-th first-first RE The difference between the carrier numbers at the location is an odd number, such that: on the single symbol carrying the first RE, for the 2 RBs of the adjacent number, the last one of the previous RBs and the latter RB An even number of the second REs are spaced between the first one of the first REs. Here, the i is a positive integer.

With reference to the first aspect or the second aspect, in another resource mapping manner of the embodiment of the present invention, the first resource element is a resource element that carries the first reference signal or the second reference signal. That is, transmitting the first reference signal and the second reference signal on different REs, the first reference signal from the first antenna port and the first from the second antenna port may be avoided The two reference signals interfere with each other due to different transmission delays.

In combination with the foregoing another resource mapping manner, in a possible implementation manner, a group of the first resource element package And including a first resource element carrying the first reference signal and a first resource element carrying the second reference signal.

In the foregoing another resource mapping manner, the RE that carries the first reference signal and the RE that carries the second reference signal may present the following two main arrangements:

In a possible arrangement, for a group of subcarriers corresponding to the first RE, a single subcarrier of the group of subcarriers only carries the first reference signal or the second reference a signal; and, two adjacent ones of the group of subcarriers respectively carry the first reference signal and the second reference signal.

In another possible arrangement, for a group of subcarriers corresponding to the first RE, a single subcarrier of the group of subcarriers carries the first reference signal and the second a reference signal; and the single subcarrier is used in an even slot to carry one of the first reference signal and the second reference signal, the single subcarrier being used in an odd slot for a bearer The other of the first reference signal and the second reference signal.

With reference to the first aspect or the second aspect, in some possible implementations, on a single symbol carrying the first RE, an interval between any two adjacent first REs is fixed by an even number of said first The second RE can realize that the RE carrying the first reference signal (or the second reference signal) is preferably evenly distributed within the system bandwidth, so that the reference signal can more objectively and comprehensively reflect the channel environment of the communication system. .

With reference to the first aspect or the second aspect, in a notification manner of the embodiment of the present invention, the resource indication information may be sent to the terminal device by dynamic signaling (for example, scheduling signaling) or semi-static signaling (for example, RRC signaling). And the resource indication information is used to indicate a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal.

Specifically, the resource indication information may include: an index of a resource mapping pattern of the first reference signal and an index of a resource mapping pattern of the second reference signal.

In a possible implementation, if the terminal device side knows a set of resource mapping patterns, the set of resource mapping patterns includes a resource mapping pattern that the first reference signal and the second reference signal may correspond to. Then, the index may be the number of the resource mapping pattern.

In another possible implementation manner, if the terminal device side knows a set of resource mapping patterns and antenna ports corresponding to the respective resource mapping patterns, the set of resource mapping patterns includes the first reference signal and the The second reference signal may correspond to a resource mapping pattern. Then, the index may be identifier information of an antenna port corresponding to the resource mapping pattern. It should be noted that the identifier information of the antenna port includes, but is not limited to, the port number of the antenna port. Other information that can identify the antenna port can also be used as the identifier information of the antenna port, which is not limited herein.

A fourth aspect of the present invention provides a network side device, including:

a processor, configured to allocate resources for the first reference signal and the second reference signal, where the first reference signal corresponds to a first antenna port of the first transmission point, and the second reference signal corresponds to a second transmission point a two antenna port; in a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal:

In a resource block, on a symbol carrying the first resource element, the first resource elements that are consecutively adjacent in the N frequency domains are a group; and the first resource element in the ith group adjacent to the frequency domain And an even number of second resource elements are separated from the first resource element of the (i+1)th group;

And an even number of the second resource elements between a set of first resource elements of the jth resource block and a set of third resource elements of the j+1th resource block on a symbol carrying the first resource element The jth resource block and the j+1th resource block are adjacent in the frequency domain;

Wherein, the above N, i, j are both positive integers; the first resource element carries the first reference signal and the a resource element of at least one of the second reference signals, where the second resource element is a resource element that does not carry the first reference signal and does not carry the second reference signal;

a transmitter, configured to send, by using the first antenna port, the first reference signal to a terminal device on a resource element that is allocated to carry the first reference signal, and is allocated to carry the second reference signal And transmitting, by the second antenna port, the second reference signal to the terminal device on the resource element.

With reference to the fourth aspect, in a possible implementation, the transmitter is further configured to send resource indication information to the terminal device by using dynamic signaling or semi-static signaling, where the resource indication information is used to indicate the a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal.

For example, the implementation of the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal may refer to the content of the first aspect or the second aspect, and details are not described herein again.

In a fifth aspect, an embodiment of the present invention provides a terminal device, including:

a receiver, configured to receive, by using a resource mapping pattern of the first reference signal, a first reference signal by using a first antenna port corresponding to the first transmission point on a resource element carrying the first reference signal, according to the second reference signal The resource mapping pattern receives the second reference signal on the resource element carrying the second reference signal through a second antenna port corresponding to the second transmission point;

And an even number of the second resource elements between a set of first resource elements of the jth resource block and a set of first resource elements of the j+1th resource block on a symbol carrying the first resource element The jth resource block and the j+1th resource block are adjacent in the frequency domain;

The foregoing N, i, j are all positive integers; the first resource element is a resource element carrying at least one of the first reference signal and the second reference signal, and the second resource element is an un-loaded The first reference signal and the resource element of the second reference signal are not carried.

In a sixth aspect, an embodiment of the present invention provides a signal transmission apparatus, where the data transmission apparatus includes a functional module for implementing the method described in the first aspect.

In a seventh aspect, an embodiment of the present invention further provides a signal transmission apparatus, where the data transmission apparatus includes a functional module for implementing the method of the second aspect.

In an eighth aspect, the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores program code, where the program code includes the first aspect, the second aspect, or the second An instruction of any possible implementation of the method of the third aspect.

The embodiment of the present invention is configured to: in the resource mapping pattern of the first reference signal and the second reference signal, the first resource elements that are consecutively adjacent to each other in the N frequency domains are a group; and the first resource element is carried a symbol, an ith set of the first resource element and the i+1th group of the first resource element are separated by an even number of second resource elements, and a set of the first resource element and the j+1th resource of the jth resource block An even number of second resource elements are separated between a group of first resource elements in the block; The first resource element carries at least one of the first reference signal and the second reference signal, and the second resource element does not carry the first reference signal and does not carry the second reference signal, so that the resource that does not carry the reference signal can be further implemented. Goodly meet the conditions of SFBC transmission and improve the anti-interference of the signal.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below.

1 is a schematic diagram of an SFBC system of two antenna ports according to an embodiment of the present invention;

2 is a schematic diagram of a communication scenario according to an embodiment of the present invention;

3A-3B are resource mapping patterns of reference signals corresponding to respective antenna ports in the prior art according to the embodiment of the present invention;

4 is a schematic flowchart of a method for transmitting a reference signal according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of resource mapping of a first reference signal and a second reference signal according to an embodiment of the present invention; FIG.

6A-6C are schematic diagrams showing a resource mapping manner of a reference signal according to an embodiment of the present invention;

7A-7E are schematic diagrams showing another resource mapping manner of a reference signal according to an embodiment of the present invention;

FIG. 8 is a schematic flowchart diagram of another method for transmitting a reference signal according to an embodiment of the present invention;

FIG. 9 is a structural diagram of an apparatus according to an embodiment of the present invention.

detailed description

The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

Multi-point SFBC transmission technology can be used to improve the signal reliability of the cell edge users and the throughput of the edge cells. The multi-point SFBC transmission is a Coordinated Multipoint Transmission (CoMP) technology, that is, two or more transmission points distributed in different geographical locations cooperatively use SFBC transmission to transmit signals. As shown in FIG. 2, the two network devices 110 can respectively perform precoding to generate one data stream, and then the two network devices 110 cooperatively transmit the two generated data streams to the terminal device 120 by using the SFBC transmission manner. .

It should be understood that one antenna port corresponds to one channel, and the receiving end (such as the terminal device 120 in FIG. 2) needs to perform channel estimation and data demodulation according to the reference signal corresponding to the antenna port. 3A-3B are diagrams showing resource mapping of a UE-specific Reference Signal (UE-RS) defined in an LTE communication protocol.

Wherein, for the resource mapping pattern corresponding to the

antenna ports

7 and 8 shown in FIG. 3A, the resource element carrying the reference signal is not included in the symbol of the UE-RS in each resource block (RB) ( The Resource Element (RE) exists separately, that is, from the frequency domain, the RE has no RE adjacent thereto, and it is not suitable to transmit service data by using SFBC coding. Similarly, for the resource mapping pattern corresponding to the antenna ports 9, 10 shown in FIG. 3B, on the symbol carrying the UE-RS in each resource block, the last resource element RE that does not carry the reference signal exists separately, that is, From the frequency domain, the RE has no RE adjacent to it, and it is not suitable to transmit service data by means of SFBC coding. It can be seen that the resource mapping manner of the UE-RS defined in the existing protocol shown in FIG. 3A-3B is such that the resource that does not carry the reference signal cannot satisfactorily satisfy the condition of the SFBC transmission, and cannot fully adopt the SFBC. Way to transmit business The data is not conducive to improving the anti-jamming performance of the entire communication system.

It should be understood that an antenna port refers to a logical port used for transmitting signals, and there may be no one-to-one correspondence with a physical antenna. An antenna port can be a physical transmit antenna or a combination of two or more physical transmit antennas. In both cases, the receiver at the receiving end does not decompose the signal from one antenna port, because from the perspective of the receiving end, whether the channel is formed by a single physical transmitting antenna or multiple physical The transmitting antenna is combined, and the reference signal corresponding to the antenna port defines the antenna port, and the receiving end can obtain the channel estimation of the antenna port according to the reference signal.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a broadband. Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) System, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, or future 5G systems .

For example, the communication system according to an embodiment of the present invention may be the communication system 100 shown in FIG. 2. In the communication system 100 shown in FIG. 2, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or may be a base station (NodeB) in a WCDMA system, or may be an LTE system. The evolved base station (Evolutional Node B, eNB or eNodeB), or the base station equipment, the small base station equipment, and the like in the future 5G network, are not limited by the present invention. The terminal device 120 supports the CoMP, that is, the terminal device 120 can communicate with the two network devices 110 in the figure. In a specific implementation, the terminal device 120 can be mobile or fixed, and the terminal device 120 can be connected to the radio access network (Radio Access). Network, RAN) communicates with one or more Core Networks, which may be referred to as access terminals, terminal devices, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, remote terminals, mobile Device, user terminal, terminal, wireless communication device, user agent or user device; terminal device 120 may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (WLL) Stations, Personal Digital Assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and terminal devices in future 5G networks.

For the communication system 100 shown in FIG. 2, the terminal device 120 supports multipoint transmission, that is, the terminal device 120 can communicate with the network device 110, such as the first base station, or with another network device 110, such as the second base station. . Optionally, the first base station 110 may serve as a serving base station. Optionally, the first base station 110 may send a physical downlink control channel (PDCCH) to the user equipment, or may send a physical downlink shared channel to the user equipment. (Physical Downlink Shared Channel, PDSCH); correspondingly, when the first base station 110 is a serving base station, the second base station 110 can serve as a cooperative base station for transmitting a PDSCH to a user equipment; or the first base station is a cooperative base station, The second base station is a serving base station, and the embodiment of the present invention is not limited thereto. Optionally, the first base station and the second base station may also be serving base stations, for example, in a scenario where there is no cell non-cell.

It can be understood that the network device 110 and the network device 120 can correspond to a transmission point, which can be a site that satisfies the QCL or a site that is not a QCL. Network device 110 and network device 120 can be different networks The network device can also be two transmission points of the same network device, such as two radio units, including a Radio Radio Unit (RRU). In LTE Release 11 (Rel-11), in order to support Coordinated Multiple Points Transmission/Reception (CoMP), that is, the user equipment may receive the PDCCH from the serving network side device, from the serving network side device or the cooperative network side. The device receives the PDSCH and introduces the concept of Quasi-Co-Location (QCL). The signal sent from the quasi-co-located antenna port will undergo the same large-scale fading. The large-scale fading includes delay spread. Doppler spread, Doppler shift, average channel gain, and average delay.

FIG. 2 exemplarily shows that the communication system 100 includes two network devices 110 and one terminal device 120. It should be noted that the communication system 100 may include two or more network devices 110, and may also include two or more terminal devices 120, which are not limited in this embodiment of the present invention.

In order to solve the problem in the prior art, an embodiment of the present invention provides a method for transmitting a reference signal and a receiving method. By implementing the method, the resources that do not carry the reference signal can better meet the conditions of the SFBC transmission and improve the anti-interference of the signal. In the embodiment of the present invention, the resource mapping pattern of the reference signal may be used to describe the distribution of the RE carrying the reference signal in the resource block.

The embodiment of the invention relates to the SFBC of the two antenna ports. The two antenna ports are specifically referred to as a first antenna port and a second antenna port. The reference signal corresponding to the first antenna port is referred to as a first reference signal, and the reference signal corresponding to the second antenna port is referred to as a second reference signal.

In an application scenario of the embodiment of the present invention, as shown in FIG. 2, the first antenna port and the second antenna port may respectively correspond to two network devices (such as a base station), that is, multiple network devices. The physical antennas logically out of the first antenna port, and the plurality of physical antennas of another network device logically out of the second antenna port. In this application scenario, the method for transmitting the reference signal provided by the embodiment of the present invention can be seen in FIG. 4, including:

S101. The first network device allocates resources for the first reference signal, and the second network device allocates resources for the second reference signal. In the embodiment of the present invention, the first reference signal corresponds to a first antenna port of a first transmission point, and the second reference signal corresponds to a second antenna port of a second transmission point; The first network device, where the second transmission point corresponds to the second network device. Here, the resource mapping pattern of the first reference signal and the second reference signal will be described in detail in conjunction with FIGS. 6A-6C and FIGS. 7A-7E.

S103. The first network device sends the first reference signal to the terminal device by using the first antenna port on a resource element that is allocated to carry the first reference signal, where the second network device is allocated to carry the Sending, by the second antenna port, the second reference signal to the terminal device on the resource element of the second reference signal.

S105. Correspondingly, the terminal device receives the first reference signal and the second reference signal according to the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal, respectively. Specifically, the terminal device may receive, by using the resource mapping pattern of the first reference signal, the first reference signal by using the first antenna port corresponding to the first transmission point on the resource element carrying the first reference signal, according to the second reference signal. And the resource mapping pattern receives the second reference signal through the second antenna port corresponding to the second transmission point on the resource element carrying the second reference signal, and finally according to the first reference signal and the second reference signal Properly demodulate business data.

In the embodiment of the present invention, in order to enable the resource that does not carry the reference signal to perform SFBC transmission better, in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:

In a resource block, on a symbol carrying the first resource element, the first resource elements that are consecutively adjacent in the N frequency domains are a group; and the first resource element in the ith group adjacent to the frequency domain An even number of second resource elements are spaced apart from the first resource element of the (i+1)th group; the above N, i are both positive integers.

And an even number of the second resource elements between a set of first resource elements of the jth resource block and a set of first resource elements of the j+1th resource block on a symbol carrying the first resource element The jth resource block and the j+1th resource block are adjacent in the frequency domain; j is a positive integer.

In this embodiment of the present invention, a group of the first resource elements is composed of consecutive first resource elements in N frequency domains.

In a specific implementation, the N may be equal to 1. For example, as shown in FIG. 5, on symbol 5 of an even time slot, a set of said first resource elements is one of the dummy elements carrying a resource element of said first reference signal. For another example, on symbol 6 of an even time slot, a set of said first resource elements is a resource element carrying one of said second reference signals. The example is only one implementation of the embodiment of the present invention. In an actual application, a group of the first resource elements may also be a resource element that carries both the first reference signal and the second reference signal.

In a specific implementation, the N may be greater than or equal to 2. For example, on symbol 5 of the odd time slot, a set of said first resource elements includes one of the dummy circles carrying the resource element of the first reference signal and a resource element carrying the second reference signal. An example is only one implementation of the embodiment of the present invention. In an actual application, a group of the first resource elements may further include two resource elements that carry the first reference signal and the second reference signal. Or the resource elements of the first reference signal or the second reference signal, or the first resource elements that are consecutively adjacent to each other in the two or more frequency domains, which are not limited in the embodiment of the present invention.

It should be noted that, in the embodiment of the present invention, the number of the resource block may be obtained by performing resource block numbering for the entire system bandwidth, or may be obtained by performing resource block numbering for the resource allocated to the terminal device. For example, the entire system resource includes 100 RBs (RB0-RB99), and the resources allocated to the terminal device include 5 RBs (RB5-RB9). Then, the jth resource block may be for the j th RB of the 100 RBs, or may be for the j th RB of the 5 RBs.

In some possible implementation manners of the embodiments of the present invention, an even number of intervals between a group of first resource elements of the jth resource block and a group of third resource elements of the j+1th resource block The second resource element may include: an even number of second resource elements in the jth resource block and an even number of second resource elements in the j+1th resource block; or an odd number of the jth resource blocks The second resource element and the odd number of second resource elements in the j+1th resource block.

In the following content, the resource element and the resource block are simply referred to as RE, RB, respectively. For the definition of the resource block RB, the resource element RE, and the like, refer to the protocol 3GPP TS 36.211 or a related version, such as an evolved version, and details are not described herein again. It should be noted that the resource block RB according to the embodiment of the present invention may refer to a resource block defined in an existing LTE communication system, or a resource block defined in a future communication system (such as 5G), for example, due to a future communication system ( For example, 5G) has higher transmission capacity, and therefore, the minimum data transmission unit resource block RB defined in the future communication system may be larger than the resource block defined in the existing LTE communication system.

It is assumed below that the first antenna port and the second antenna port are respectively antenna port 7 in the LTE communication protocol. And the antenna port 8, the resource mapping manner of the two main reference signals involved in the embodiment of the present invention will be described in detail with reference to the accompanying drawings. 6A-6C illustrate a resource mapping manner provided by an embodiment of the present invention, and FIG. 7A-7E illustrates another resource mapping manner provided by an embodiment of the present invention. It should be noted that the first antenna port and the second antenna port may also be other antenna ports for transmitting reference signals, such as the antenna port 9 and the antenna port 10 in the LTE communication protocol, which are not limited herein.

First, a resource mapping manner of a reference signal according to an embodiment of the present invention is described in detail with reference to FIG. 6A-6C. The resource mapping manner corresponding to FIG. 6A-6C is implemented, and both the first reference signal and the second reference signal are sent on the same RE, so that the system resources can be fully utilized; and the two are transmitted on the same RE at the same time. The channel reference signals can be orthogonal by orthogonal vectors to avoid mutual interference.

As shown in FIG. 6A, the resource mapping pattern of the first reference signal (the resource mapping pattern corresponding to the antenna port 7) and the resource mapping pattern of the second reference signal (the resource mapping pattern corresponding to the antenna port 8) are the same. That is to say, the first resource element is a resource element that carries both the first reference signal and the second reference signal.

For example, as shown in FIG. 6A, for a single RB, on a symbol (such as symbol 5) carrying the first RE, between the first RE of the i-th group and the first RE of the (i+1)th group An even number (such as 4) of the second RE is spaced. Here, i is a positive integer. In this way, it is ensured that the number of consecutively adjacent second REs in an individual RB is an even number, and SFBC transmission of service data on the even-numbered consecutive adjacent second REs can be implemented, and the transmitted data is improved. Anti-interference ability of business data.

It should be noted that FIG. 6A merely exemplarily shows that a group of the first REs includes only one of the first REs, that is, the N is equal to 1. In an actual application, a group of the first REs may also include two or more of the first REs, that is, the N may be greater than or equal to two, which is not limited by the embodiment of the present invention.

It should be noted that FIG. 6A only exemplarily shows that the second RE is separated between the first RE of the i-th group and the first RE of the (i+1)th group. In actual application, the interval is The number of the second RE is not limited by FIG. 6A, and may be an even number, which may be related to the number of the first REs on a single symbol. It can be understood that the more the first RE, the adjacent The second RE is spaced between the two first REs.

As shown in FIG. 6A, for two adjacent RBs in the frequency domain, such as RB0 and RB1, on a symbol (such as symbol 5) carrying the first RE, a set of first RE and RB1 of RB0 An even number of second REs are separated between the first REs of the group. For example, on the symbol 5, the first group of the first RE of the RB0 and the first group of the RB1, the second group, and the third group of the first RE are evenly spaced apart by an even number of second REs, which are respectively separated by 10, 14, and 18 Second RE. The example is only one implementation manner of the embodiment of the present invention, and may be different in practical applications, and should not be construed as limiting. In this way, it is ensured that the number of consecutively adjacent second REs between two adjacent RBs is an even number, and SFBC transmission of service data on the even-numbered consecutive adjacent second REs can be implemented, thereby improving The anti-interference ability of the transmitted service data.

In a specific implementation, as shown in FIG. 6B, the difference between the carrier number where the i th first first RE in the odd numbered RB is located and the carrier number where the i th first first RE in the even number RB are located is An odd number, such that, on a single symbol carrying the first RE, for the two RBs of the adjacent number, the first one of the previous one of the RBs and the first one of the latter one of the RBs An even number of said second REs are spaced between one RE. Here, the i is a positive integer.

For example, on the symbol 6 carrying the first RE, the first one of the odd-numbered RBs is on the number 0 subcarrier, and the first one of the even-numbered RBs is in the first number. On the subcarrier, it may be that, on the symbol 6, two of the first RE in the RB0 and the first RE in the RB1 are separated by two of the second The RE can implement SFBC transmission of service data on the second RE adjacent to the two frequency domains.

In an actual application, as another variation of FIG. 6B, the resource mapping pattern corresponding to the odd-numbered RB shown in FIG. 6B may be interchanged with the resource mapping pattern corresponding to the even-numbered RB shown in FIG. 6B.

For the resource map shown in FIG. 6A, FIG. 6B, the signal sequence r of the first reference signal or the second reference signal may be mapped to a complex modulation symbol according to the following algorithm.

on:

k'=n _PRB mod2 p∈{7,8}

m'=0,1,2

Where w is an orthogonal vector, such that the first reference signal and the second reference signal transmitted on the same RE are orthogonal to each other and do not interfere with each other. For the definition and physical meaning of each parameter in the above algorithm, please refer to the standard protocol 3GPP TS 36.211, which is not described here.

As shown in FIG. 6C, by using a resource mapping manner corresponding to the odd-numbered RB and the even-numbered RB shown in FIG. 6B, respectively, on a single symbol carrying the first RE (for example, symbol 6 of an odd slot) The first one of the first RE of the RB1 and the first one of the first RE of the RB2 are separated by 0 of the second RE in the frequency domain, and the first one of the first RE of the RB2 and the first of the RB3 are The first RE is spaced apart by two of the second REs in the frequency domain, so that an odd number of the second REs are not present at (or near) the sidebands of the two RBs, ensuring that the two RBs are at the sidebands of the two RBs. (or nearby) SFBC transmission of service data can also be implemented to improve the anti-interference ability of the transmitted service data.

In the embodiment of the present invention, in order to enable the reference signal to reflect the channel environment of the communication system more objectively and comprehensively, the RE carrying the first reference signal (or the second reference signal) is preferably evenly distributed in the system bandwidth. Inside. That is to say, on a single symbol carrying the first RE, an even number of values (such as "4") of the second RE are fixed between any two adjacent first REs.

Next, another resource mapping manner for the reference signal provided by the embodiment of the present invention is described in detail in conjunction with FIG. 7A-7E. Implementing the resource mapping manner corresponding to FIG. 7A-7E, by transmitting the first reference signal and the second reference signal on different REs, the first reference signal from the first antenna port and the The second reference signal of the second antenna port interferes with each other due to different transmission delays. That is to say, in the other In the resource mapping mode, the first RE is a resource element that carries the first reference signal or the second reference signal.

As shown in FIG. 7A, for a single RB, on a symbol carrying the first RE, the first RE is grouped adjacent to each other in the frequency domain, and N consecutively adjacent first REs in the frequency domain are A group (one virtual coil corresponding to a group), a group of the first REs including an RE carrying the first reference signal and an RE carrying the second reference signal.

For example, as shown in FIG. 7A, on the same single symbol (for example, symbol 5), the first RE may be adjacent to each other in the frequency domain, and two adjacent first REs are a group. And a set of the first RE includes: one RE that carries the first reference signal and one RE that carries the second reference signal.

The example is only one implementation of the embodiment of the present invention. In an actual application, a group of the first REs may further include two or more consecutive adjacent first REs, which are not limited herein.

For a single RB, on the one symbol carrying the first RE, an even number of the second REs are separated between the first RE of the i-th group and the first RE of the (i+1)th group. Where i is a positive integer. For example, as shown in FIG. 7A, on the symbol 5, two first REs are separated from the first RE of the first group and the first RE of the second group. In this way, it is ensured that the number of consecutively adjacent second REs in an individual RB is an even number, and SFBC transmission of service data on the even-numbered consecutive adjacent second REs can be implemented, and the transmitted data is improved. Anti-interference ability of business data.

As shown in FIG. 7B, for two adjacent RBs in the frequency domain, such as RB0 and RB1, on a symbol (such as symbol 5) carrying the first RE, a set of first RE and RB1 of RB0 An even number of second REs are separated between the first REs of the group. For example, on the symbol 5, the first group of the first RE of the RB0 and the first group of the RB1, the second group, and the third group of the first RE are evenly spaced apart by an even number of second REs, which are respectively separated by 6, 8, and 10 Second RE. The example is only one implementation manner of the embodiment of the present invention, and may be different in practical applications, and should not be construed as limiting. In this way, it is ensured that the number of consecutively adjacent second REs between two adjacent RBs is an even number, and SFBC transmission of service data on the even-numbered consecutive adjacent second REs can be implemented, thereby improving The anti-interference ability of the transmitted service data.

In the embodiment of the present invention, the RE that carries the first reference signal and the RE that carries the second reference signal may present the following two main arrangements:

For example, as shown in FIG. 7A, a group of subcarriers corresponding to the first group of the first group includes: subcarrier 2 and subcarrier 3, wherein subcarrier 2 is only used to carry the second reference signal, and subcarrier 3 It is only used to carry the first reference signal.

For the resource map shown in FIG. 7A, the signal sequence r of the first reference signal or the second reference signal may be mapped to a complex modulation symbol according to the following algorithm.

on:

m'=0,1,2

Where w is an orthogonal vector, and the orthogonal vector w may not be reflected in the mapping algorithm of the above signal sequence in practical applications. For the definition and physical meaning of each parameter in the above algorithm, please refer to the standard protocol 3GPP TS 36.211, which is not described here.

It is to be noted that FIG. 7A exemplarily shows an implementation manner of the embodiment of the present invention, which may be different in practical applications. For example, the arrangement manner is as shown in FIG. 7D, which is not limited in the embodiment of the present invention.

For example, as shown in FIG. 7C, a group of subcarriers corresponding to the first group of the first group includes: subcarrier 2 and subcarrier 3, wherein subcarrier 2 is used to carry the second reference signal in an even slot. Subcarrier 2 is used to carry the first reference signal in an odd slot; subcarrier 3 is used to carry the first reference signal in an even slot, and subcarrier 3 is used to carry the Second reference signal.

For the resource map shown in FIG. 7C, the signal sequence r of the first reference signal or the second reference signal may be mapped to a complex modulation symbol according to the following algorithm.

on:

m'=0,1,2

It is to be noted that FIG. 7C exemplarily shows an implementation manner of the embodiment of the present invention, which may be different in practical applications. For example, the arrangement manner is as shown in FIG. 7E, and the embodiment of the present invention is not limited.

In the embodiment of the present invention, the symbol for carrying the first reference signal is the same as the symbol for carrying the second reference signal, and the same symbol may be determined according to a protocol:

Specifically, in the case of using a normal cyclic prefix, the same symbol can be selected from the first group of symbols. The first set of symbols may be a set of symbols pre-specified by the protocol for carrying the reference signal for the normal cyclic prefix, for example, the symbols 2, 3, 5, 6 specified in the standard protocol 3GPP TS 36.211. It should be noted that the protocol may further define other symbols for carrying the reference signal under the normal cyclic prefix, which is not limited herein.

Specifically, in the case of using an extended cyclic prefix, the same symbol can be selected from the second set of symbols. The second set of symbols may be a set of symbols for carrying the reference signal for the extended cyclic prefix specified by the preset protocol, for example, the symbols 2, 3, 4, 5 specified in the standard protocol 3GPP TS 36.211. It should be noted that the protocol may further define other symbols for carrying the reference signal under the extended cyclic prefix, which is not limited herein.

In some possible implementation manners of the embodiments of the present invention, on the same single symbol, the number of the second REs that are separated between any two adjacent groups of the first REs in a single RB is The fixed even number can realize that the first RE carrying the first reference signal or the second reference signal is evenly distributed within the system bandwidth, so that the reference signal can more objectively and comprehensively reflect the communication system. Channel environment.

In the embodiment of the present invention, after the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal are determined, the first network device and the second network device need to adopt the two types. Notifying the terminal device of a resource mapping pattern of the reference signal, so that the terminal device can receive the first reference signal and the second on an RE that carries the first reference signal and the second reference signal The signal is referenced, and finally the service data is correctly demodulated based on the first reference signal and the second reference signal.

In a notification manner of the embodiment of the present invention, the resource indication information may be sent to the terminal device by using dynamic signaling (such as scheduling signaling) or semi-static signaling (for example, RRC signaling), where the resource indication information is used to indicate And a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal.

In a possible implementation, if the terminal device side knows a set of resource mapping patterns, the set of resource mapping patterns includes a resource mapping pattern that the first reference signal and the second reference signal may correspond to. Then, the index may be a number (ID) of the resource mapping pattern within the group.

In yet another implementation, the index may be the number of the RB. In the specific implementation, an RB number itself is also A resource mapping pattern that can be used to indicate a reference signal corresponding to the RB. For example, the first reference signal corresponding to RB1, the resource mapping pattern of the second reference signal is as shown in the right drawing of FIG. 6B; the first reference signal corresponding to RB0, and the second reference signal The resource mapping pattern is shown in the left drawing of Figure 6B. For another example, the first reference signal corresponding to RB1, the resource mapping pattern of the second reference signal is as shown in FIG. 7A; the first reference signal corresponding to RB0, and the resource mapping pattern of the second reference signal, for example Figure 7C shows. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

It should be noted that the index may also be other forms of information that can be used to represent the resource mapping pattern of the first reference signal and the second reference signal, which are not limited herein.

In some possible implementation scenarios, for example, the resource mapping manners as shown in FIG. 6A-6C may be such that the first reference signal and the resource mapping pattern of the second reference signal corresponding to the odd and even numbered RBs respectively The two antenna ports (antenna ports 9, 7) defined in the existing protocol (for example, 3GPP TS 36.211) have the same resource mapping pattern corresponding to the reference signal. Therefore, the antenna port 9 and the antenna port 7 defined in the 3GPP TS 36.211 protocol can be used to indicate the resource mapping patterns of the first reference signal and the second reference signal respectively corresponding to the odd and even numbered RBs.

For some possible implementation scenarios, the index included in the resource indication information may be a port number of the two antenna ports defined in an existing protocol.

For some possible implementation scenarios, the resource indication information may also include: a first indication bit.

If the first indicator bit is equal to the first value, it indicates that the resource mapping pattern of the first reference signal and the second reference signal corresponding to the odd-numbered RB is the same as the resource mapping pattern of the reference signal corresponding to the antenna port 9. The resource mapping pattern of the first reference signal and the second reference signal corresponding to the even number RB is the same as the resource mapping pattern of the reference signal corresponding to the antenna port 7;

If the first indicator bit is not equal to the first value, it indicates that the first reference signal corresponding to the odd-numbered RB, the resource mapping pattern of the second reference signal, and the resource of the reference signal corresponding to the antenna port 7 The mapping pattern is the same, and the resource mapping pattern of the first reference signal and the second reference signal corresponding to the even number RB is the same as the resource mapping pattern of the reference signal corresponding to the antenna port 9.

It should be noted that the antenna port 9 and the antenna port 7 are only one example of two antenna ports defined in the existing protocol. In practical applications, the two antenna ports defined in the existing protocol may also be used in other applications. The antenna port is not limited here.

In a specific implementation, the first indicator bit may be 1 bit. In an actual application, the first indicator bit may also be an indicator bit of multiple bits, and the first indicator bit may also be an indication of other data types. Bits, such as characters, are not restricted here.

For some possible implementation scenarios, the resource indication information may further include: a second indication bit, in order to be compatible with the resource mapping manner of the reference signal defined in the preset protocol.

If the second indicator bit is equal to the second value, it indicates that the resource mapping pattern of the first reference signal is consistent with the resource mapping pattern of the reference signal corresponding to the first antenna port defined in the preset protocol, The resource mapping pattern of the second reference signal is consistent with the resource mapping pattern of the reference signal corresponding to the second antenna port defined in the preset protocol;

If the second indicator bit is not equal to the second value, it indicates that the first reference signal corresponding to the odd and even numbered RBs respectively, and the resource mapping pattern of the second reference signal passes through the existing protocol. Defined two antenna ports Characterized by (eg antenna port 9 and antenna port 7).

In a specific implementation, the first indicator bit may be 1 bit. In an actual application, the second indicator bit may also be an indicator bit of multiple bits, and the second indicator bit may also be an indication of other data types. Bits, such as characters, are not restricted here.

Specifically, the resource indication information may also include: indication information of a subcarrier carrying the first reference signal and the second reference signal, and a symbol carrying the first reference signal and the second reference signal. Instructions. It can be understood that an RE carrying a reference signal can be represented by a subcarrier carrying the reference signal and a symbol carrying the reference signal.

In order to save the signaling consumption and save the air interface resources, the embodiment of the present invention may also statically agree with the terminal device by using a protocol: a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal. For example, the protocol is statically agreed: the first reference signal corresponding to the odd RB, the resource mapping pattern of the second reference signal is as shown in the right drawing of FIG. 6B; the first reference signal corresponding to the even RB, The resource mapping pattern of the second reference signal is as shown in the left figure of FIG. 6B. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

In a specific implementation, an RB number itself may also be used to indicate a resource mapping pattern of a reference signal corresponding to the RB. For example, the protocol is statically agreed: the first reference signal corresponding to RB1, the resource mapping pattern of the second reference signal is as shown in the right drawing of FIG. 6B; the first reference signal corresponding to RB0, the The resource mapping pattern of the second reference signal is as shown in the left drawing of FIG. 6B. For example, the protocol is statically agreed: the first reference signal corresponding to RB1, the resource mapping pattern of the second reference signal is as shown in FIG. 7A; the first reference signal corresponding to RB0, the second reference signal The resource mapping pattern is shown in Figure 7C. The examples are merely illustrative of the embodiments of the invention and should not be construed as limiting.

It should be noted that, as shown in FIG. 8 , in another application scenario of the embodiment of the present invention, the first antenna port and the second antenna port may also belong to the same network device (such as a base station), that is, A plurality of physical antennas of one network device logically out two antenna ports: the first antenna port and the second antenna port. It should be understood that, in the another application scenario shown in FIG. 8, the first network device and the second network device described in the method embodiment of FIG. 4 may also be represented by the same network device. .

The embodiment of the present invention is configured to: in the resource mapping pattern of the first reference signal and the second reference signal, the first resource elements that are consecutively adjacent to each other in the N frequency domains are a group; and the first resource element is carried a symbol, an ith set of the first resource element and the i+1th group of the first resource element are separated by an even number of second resource elements, and a set of the first resource element and the j+1th resource of the jth resource block An even number of second resource elements are separated between a group of first resource elements in the block; wherein the first resource element carries at least one of a first reference signal and a second reference signal, where the second resource element does not carry the first reference The signal and the second reference signal are not carried, so that the resource without the reference signal can better satisfy the condition of the SFBC transmission and improve the anti-interference of the signal.

Based on the same inventive concept, an embodiment of the present invention further provides a device (shown in FIG. 9) for implementing the method described in the foregoing FIG. 4 embodiment.

When the device is a network side device, the processor 10 is configured to allocate resources for the first reference signal and the second reference signal, where the first reference signal corresponds to the first antenna port of the first transmission point, and the second The reference signal corresponds to a second antenna port of the second transmission point; the transmitter 20 is configured to pass on the resource element allocated to carry the first reference signal Transmitting, by the first antenna port, the first reference signal to a terminal device, and sending, by the second antenna port, the second reference to the terminal device on a resource element that is allocated to carry the second reference signal signal.

Specifically, for the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal, reference may be made to the foregoing method embodiments, and details are not described herein again.

Optionally, the transmitter 20 is configured to send the resource indication information to the terminal device by using dynamic signaling or semi-static signaling, where the resource indication information is used to indicate a resource mapping pattern of the first reference signal and the A resource mapping pattern of the two reference signals.

When the device is a terminal device, the receiver 30 is configured to receive, by using a resource mapping pattern of the first reference signal, a first antenna port corresponding to the first transmission point on the resource element that carries the first reference signal. And a reference signal, the second reference signal is received by the second antenna port corresponding to the second transmission point on the resource element carrying the second reference signal according to the resource mapping pattern of the second reference signal.

Specifically, for the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal, reference may be made to the foregoing method embodiment, and details are not described herein again.

It can be understood that when the above device is a network side device, the communication interface may be further configured to implement communication between the network side device and other network nodes, and the other network nodes include other network side devices or the core network. Nodes are not limited here.

Based on the same inventive concept, an embodiment of the present invention further provides a signal transmission apparatus, which includes a function module for performing each step in the method described in the foregoing embodiment of FIG. 4.

The various variations and specific examples in the method described in the foregoing embodiment of FIG. 4 are equally applicable to the signal transmission device of the present embodiment and the device in FIG. 9, and the detailed description of the method described in the foregoing embodiment of FIG. The signal transmission device in this embodiment and the implementation method of the device in FIG. 9 can be clearly understood by a person, and therefore, for the sake of brevity of the description, details are not described herein.

One of ordinary skill in the art can understand all or part of the process of implementing the above embodiments, which can be completed by a computer program to instruct related hardware, the program can be stored in a computer readable storage medium, when the program is executed The flow of the method embodiments as described above may be included. The foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.

Claims

A method for transmitting a reference signal, comprising:

Allocating resources for the first reference signal and the second reference signal, the first reference signal corresponding to the first antenna port of the first transmission point, and the second reference signal corresponding to the second antenna port of the second transmission point; In the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:

In a resource block, on a symbol carrying the first resource element, the first resource elements that are consecutively adjacent in the N frequency domains are a group; and the first resource element in the ith group adjacent to the frequency domain And an even number of second resource elements are separated from the first resource element of the (i+1)th group;

And an even number of the second resource elements between a set of first resource elements of the jth resource block and a set of first resource elements of the j+1th resource block on a symbol carrying the first resource element The jth resource block and the j+1th resource block are adjacent in the frequency domain;

The foregoing N, i, j are all positive integers; the first resource element is a resource element carrying at least one of the first reference signal and the second reference signal, and the second resource element is an un-loaded a resource element of the first reference signal and not carrying the second reference signal;

Transmitting, by the first antenna port, the first reference signal to a terminal device on a resource element that is allocated to carry the first reference signal, and transmitting the resource element that is allocated to carry the second reference signal The second antenna port sends the second reference signal to the terminal device.
The method according to claim 1, wherein an even number of intervals between a set of first resource elements of said jth resource block and a set of third resource elements of said j+1th resource block The second resource element, including:

An even number of second resource elements of the jth resource block and an even number of second resource elements of the j+1th resource block; or an odd number of second resource elements and a j+1th of the jth resource block An odd number of second resource elements in a resource block.
The method according to claim 1 or 2, wherein the first resource element is a resource element that carries both the first reference signal and the second reference signal.
The method of claim 3 wherein said N is one.
The method according to claim 1 or 2, wherein the first resource element is a resource element carrying the first reference signal or the second reference signal.
The method of claim 5 wherein the set of said first resource elements comprises a first resource element carrying said first reference signal and a first resource element carrying said second reference signal.
A method for receiving a reference signal, comprising:

And receiving, by the resource mapping element of the first reference signal, a first reference signal by using a first antenna port corresponding to the first transmission point on the resource element carrying the first reference signal, and the resource mapping pattern according to the second reference signal is on the bearer Receiving, by the second antenna port corresponding to the second transmission point, the second reference signal on the resource element of the second reference signal;

In a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal:

In a resource block, on a symbol carrying the first resource element, the first resource elements that are consecutively adjacent in the N frequency domains are a group; and the first resource element in the ith group adjacent to the frequency domain And an even number of second resource elements are separated from the first resource element of the (i+1)th group;

A set of first resource elements and j+1th resources of the jth resource block on a symbol carrying the first resource element An even number of the second resource elements are separated between a group of first resource elements in the source block; the jth resource block and the j+1th resource block are adjacent in the frequency domain;

The foregoing N, i, j are all positive integers; the first resource element is a resource element carrying at least one of the first reference signal and the second reference signal, and the second resource element is an un-loaded The first reference signal and the resource element of the second reference signal are not carried.
The method according to claim 7, wherein an even number of intervals between a set of first resource elements of the jth resource block and a set of first resource elements of the j+1th resource block The second resource element, including:

An even number of second resource elements of the jth resource block and an even number of second resource elements of the j+1th resource block; or an odd number of second resource elements and a j+1th of the jth resource block An odd number of second resource elements in a resource block.
The method according to claim 7 or 8, wherein the first resource element is a resource element that carries both the first reference signal and the second reference signal.
The method of claim 9 wherein said N is one.
The method according to claim 7 or 8, wherein the first resource element is a resource element carrying the first reference signal or the second reference signal.
The method of claim 11 wherein a set of said first resource elements comprises a first resource element carrying said first reference signal and a first resource element carrying said second reference signal.
A network side device, comprising:

a processor, configured to allocate resources for the first reference signal and the second reference signal, where the first reference signal corresponds to a first antenna port of the first transmission point, and the second reference signal corresponds to a second transmission point a two antenna port; in a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal:

In a resource block, on a symbol carrying the first resource element, the first resource elements that are consecutively adjacent in the N frequency domains are a group; and the first resource element in the ith group adjacent to the frequency domain And an even number of second resource elements are separated from the first resource element of the (i+1)th group;

And an even number of the second resource elements between a set of first resource elements of the jth resource block and a set of third resource elements of the j+1th resource block on a symbol carrying the first resource element The jth resource block and the j+1th resource block are adjacent in the frequency domain;

The foregoing N, i, j are all positive integers; the first resource element is a resource element carrying at least one of the first reference signal and the second reference signal, and the second resource element is an un-loaded a resource element of the first reference signal and not carrying the second reference signal;

a transmitter, configured to send, by using the first antenna port, the first reference signal to a terminal device on a resource element that is allocated to carry the first reference signal, and is allocated to carry the second reference signal And transmitting, by the second antenna port, the second reference signal to the terminal device on the resource element.
The network side device according to claim 13, wherein an even number of intervals between a group of first resource elements of the jth resource block and a group of third resource elements of the j+1th resource block The second resource element includes:

An even number of second resource elements of the jth resource block and an even number of second resource elements of the j+1th resource block; or an odd number of second resource elements and a j+1th of the jth resource block An odd number of second resource elements in a resource block.
The network side device according to claim 13 or 14, wherein the first resource element is The first reference signal carries the resource element of the second reference signal.
The network side device according to claim 15, wherein said N is 1.
The network side device according to claim 13 or 14, wherein the first resource element is a resource element carrying the first reference signal or the second reference signal.
The network side device according to claim 17, wherein the group of the first resource elements comprises a first resource element carrying the first reference signal and a first resource element carrying the second reference signal.
A terminal device, comprising:

a receiver, configured to receive, by using a resource mapping pattern of the first reference signal, a first reference signal by using a first antenna port corresponding to the first transmission point on a resource element carrying the first reference signal, according to the second reference signal The resource mapping pattern receives the second reference signal on the resource element carrying the second reference signal through a second antenna port corresponding to the second transmission point;

In a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal:

In a resource block, on a symbol carrying the first resource element, the first resource elements that are consecutively adjacent in the N frequency domains are a group; and the first resource element in the ith group adjacent to the frequency domain And an even number of second resource elements are separated from the first resource element of the (i+1)th group;

And an even number of the second resource elements between a set of first resource elements of the jth resource block and a set of first resource elements of the j+1th resource block on a symbol carrying the first resource element The jth resource block and the j+1th resource block are adjacent in the frequency domain;

The foregoing N, i, j are all positive integers; the first resource element is a resource element carrying at least one of the first reference signal and the second reference signal, and the second resource element is an un-loaded The first reference signal and the resource element of the second reference signal are not carried.
The terminal device according to claim 19, wherein an even number of intervals between a group of first resource elements of the jth resource block and a group of first resource elements of the j+1th resource block The second resource element includes:

An even number of second resource elements of the jth resource block and an even number of second resource elements of the j+1th resource block; or an odd number of second resource elements and a j+1th of the jth resource block An odd number of second resource elements in a resource block.
The terminal device according to claim 19 or 20, wherein the first resource element is a resource element that carries both the first reference signal and the second reference signal.
The terminal device according to claim 21, wherein said N is 1.
The terminal device according to claim 19 or 20, wherein the first resource element is a resource element carrying the first reference signal or the second reference signal.
The terminal device according to claim 23, wherein the set of the first resource elements comprises a first resource element carrying the first reference signal and a first resource element carrying the second reference signal.