CN107306176B - Reference signal sending method, reference signal receiving method and related equipment - Google Patents

Reference signal sending method, reference signal receiving method and related equipment Download PDF

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CN107306176B
CN107306176B CN201610257541.1A CN201610257541A CN107306176B CN 107306176 B CN107306176 B CN 107306176B CN 201610257541 A CN201610257541 A CN 201610257541A CN 107306176 B CN107306176 B CN 107306176B
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reference signal
resource
resource elements
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CN107306176A (en
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王婷
李元杰
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0606—Space-frequency coding

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Abstract

A sending method, a receiving method and related equipment of a reference signal are provided, the method comprises: allocating resources for the first reference signal and the second reference signal, in a resource mapping pattern of the first reference signal and the second reference signal: n first resource elements which are continuously adjacent on the frequency domain form a group; on one symbol carrying the first resource elements, even second resource elements are spaced between the ith group of first resource elements and the (i + 1) th group of first resource elements, and even second resource elements are spaced between one group of first resource elements of the jth resource block and one group of first resource elements in the (j + 1) th resource block; the first resource element carries at least one of a first reference signal and a second reference signal, and the second resource element does not carry the first reference signal and does not carry the second reference signal. By the method, the resource which does not bear the reference signal can better meet the SFBC transmission condition, and the anti-interference performance of the signal is improved.

Description

Reference signal sending method, reference signal receiving method and related equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for sending and receiving a reference signal, a network side device, and a terminal device.
Background
Space Frequency Block Code (SFBC) is an anti-interference technology in Long Term Evolution (LTE) system. In the LTE standard, SFBC is adopted as a transmit diversity scheme for two antenna ports, and the basic idea is as follows: after constellation mapping, information bits to be transmitted enter a space-frequency encoder by taking two symbols as a unit. For example, as shown in fig. 1, for a two-transmit-antenna SFBC system, assuming symbol streams input to the SFBC encoder are C1 and C2, C1 and C2 are transmitted on the 1 st subcarriers of antenna 1 and antenna 2, respectively, and-C2 and C1 are transmitted on the 2 nd subcarriers of antenna 1 and antenna 2, respectively. Where (), denotes the conjugate of the complex number. One SFBC coding matrix can be represented as follows:
Figure GDA0002270426360000011
the above expression represents: the same SFBC code block will occupy two adjacent subcarriers of two antenna transmit ports, the two adjacent subcarriers of transmit antenna port 1 carrying C1 and C2, the two adjacent subcarriers of transmit antenna port 2 carrying C1 and C2Subcarrier bearer-C2*And C1*。
However, research has revealed that the SFBC scheme is not fully utilized, and a data transmission method that fully utilizes the SFBC scheme is required.
Disclosure of Invention
The embodiment of the invention provides a reference signal sending method, a reference signal receiving method and related equipment, which can realize that resources which do not bear reference signals can better meet the SFBC transmission condition and improve the anti-interference performance of signals.
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 a first reference signal and a second reference signal, the first reference signal corresponding to a first antenna port of a first transmission point, the second reference signal corresponding to a second antenna port of a second transmission point; in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain; the N and i are positive integers;
on one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain; j is a positive integer;
transmitting the first reference signal to a terminal device through the first antenna port on the resource element allocated to carry the first reference signal, and transmitting the second reference signal to the terminal device through the second antenna port on the resource element allocated to carry the second reference signal.
In a second aspect, an embodiment of the present invention provides a method for receiving a reference signal, where the method includes:
receiving a first reference signal through a first antenna port corresponding to a first transmission point on resource elements carrying the first reference signal according to a resource mapping pattern of the first reference signal, and receiving a second reference signal through a second antenna port corresponding to a second transmission point on resource elements carrying the second reference signal according to a resource mapping pattern of the second reference signal;
in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain; the N and i are positive integers;
on one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain; and j is a positive integer.
In this embodiment of the present invention, the first resource element is a resource element carrying at least one of the first reference signal and the second reference signal. That is, a first resource element may carry the first reference signal or the second reference signal; the first resource element may carry both the first and second reference signals. The second resource element is a resource element not carrying the first reference signal and not carrying the second reference signal.
The first aspect and the second aspect describe the sending and receiving methods of the reference signal provided by the embodiment of the present invention from the network device side and the terminal device side, respectively, and by implementing the sending and receiving methods of the reference signal, it is possible to achieve that resources not bearing the reference signal can better satisfy the SFBC transmission condition, and improve the anti-interference performance of the signal.
With reference to the first aspect or the second aspect, in some possible embodiments, an even number of the second resource elements spaced between a group of the first resource elements in the jth resource block and a group of the first resource elements in the j +1 th resource block 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 +1 th resource block; or, odd second resource elements in the jth resource block and odd second resource elements in the j +1 th 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, and system resources can be fully utilized.
With reference to the foregoing resource mapping manner, in a possible implementation manner, N may be equal to 1, that is: a set of the first resource elements includes only 1 resource element that carries both the first reference signal and the second reference signal.
With reference to the foregoing one resource mapping manner, in a possible implementation manner, a difference between a carrier number where an ith first RE in an odd-numbered RB is located and a carrier number where an ith first RE in an even-numbered RB is located is an odd number, so that: on a single symbol carrying said first REs, for the adjacently numbered 2 RBs, the last said first RE in the preceding RB is spaced from the first said first RE in the following RB by an even number of said second REs. Here, 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 carrying the first reference signal or the second reference signal. Namely: the first reference signal and the second reference signal are transmitted on different REs, so that mutual interference caused by different transmission delays of the first reference signal from the first antenna port and the second reference signal from the second antenna port can be avoided.
With reference to the another resource mapping manner, in a possible implementation manner, a group of the first resource elements includes a first resource element carrying the first reference signal and a first resource element carrying the second reference signal.
In another resource mapping manner, the REs carrying the first reference signal and the REs carrying the second reference signal may present the following two main arrangements:
in one possible arrangement, for a group of subcarriers corresponding to a group of the first REs, a single subcarrier in the group of subcarriers carries only the first reference signal or the second reference signal; and, adjacent 2 subcarriers in the group of subcarriers carry the first reference signal and the second reference signal, respectively.
In another possible arrangement, for a group of subcarriers corresponding to a group of the first REs, a single subcarrier in the group of subcarriers carries the first reference signal and the second reference signal; and the single subcarrier is used for carrying one of the first reference signal and the second reference signal in an even time slot, and is used for carrying the other of the first reference signal and the second reference signal in an odd time slot.
With reference to the first aspect or the second aspect, in some possible implementations, on a single symbol carrying the first REs, any two adjacent first REs are spaced by a fixed even number of the second REs, so that the REs carrying the first reference signal (or the second reference signal) are preferably uniformly distributed in a system bandwidth, and the reference signal can reflect a channel environment of a communication system more objectively and more comprehensively.
With reference to the first aspect or the second aspect, in a notification manner of the embodiment of the present invention, resource indication information may be sent to a terminal device through dynamic signaling (e.g., scheduling signaling) or semi-static signaling (e.g., RRC signaling), where 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 a set of resource mapping patterns is known by the terminal device side, where the set of resource mapping patterns includes resource mapping patterns to which the first reference signal and the second reference signal may correspond, the index may be a number of the resource mapping pattern.
In another possible implementation manner, if a set of resource mapping patterns and antenna ports corresponding to the respective resource mapping patterns are known by the terminal device side, where the set of resource mapping patterns includes resource mapping patterns to which the first reference signal and the second reference signal may correspond, the index may be identification information of the antenna ports corresponding to the resource mapping patterns. It should be noted that the identification information of the antenna port includes, but is not limited to, a port number of the antenna port, and other information capable of characterizing the antenna port may also be used as the identification information of the antenna port, which is not limited herein.
In a fourth aspect, an embodiment of the present invention provides a network side device, including:
a processor configured to allocate resources for a first reference signal and a second reference signal, the first reference signal corresponding to a first antenna port of a first transmission point, the second reference signal corresponding to a second antenna port of a second transmission point; in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain;
on one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain;
wherein, the 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 a resource element not carrying the first reference signal and not carrying the second reference signal;
a transmitter, configured to transmit the first reference signal to a terminal device through the first antenna port on the resource element allocated to carry the first reference signal, and transmit the second reference signal to the terminal device through the second antenna port on the resource element allocated to carry the second reference signal.
With reference to the fourth aspect, in a possible implementation manner, the transmitter is further configured to transmit, to the terminal device through dynamic signaling or semi-static signaling, resource indication information, where 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, for the implementation of 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 contents of the first aspect or the second aspect, which is not described herein again.
In a fifth aspect, an embodiment of the present invention provides a terminal device, including:
a receiver configured to receive a first reference signal through a first antenna port corresponding to a first transmission point on resource elements carrying the first reference signal according to a resource mapping pattern of the first reference signal, and receive a second reference signal through a second antenna port corresponding to a second transmission point on resource elements carrying the second reference signal according to a resource mapping pattern of the second reference signal;
in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain;
on one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain;
wherein, the 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 a resource element not carrying the first reference signal and not carrying the second reference signal.
Specifically, for the implementation of 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 contents of the first aspect or the second aspect, which is not described herein again.
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 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 in the second aspect.
In an eighth aspect, the present invention also provides a computer storage medium, where the computer storage medium has program code stored thereon, where the program code includes instructions for implementing any possible implementation manner of the method in the first aspect, the second aspect, or the third aspect of the second aspect.
Implementing embodiments of the present invention by having, in the resource mapping pattern of the first reference signal and the second reference signal: n first resource elements which are continuously adjacent on the frequency domain form a group; on one symbol carrying the first resource elements, even second resource elements are spaced between the ith group of first resource elements and the (i + 1) th group of first resource elements, and even second resource elements are spaced between one group of first resource elements of the jth resource block and one group of first resource elements in the (j + 1) th resource 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 which does not carry the reference signal can better meet the condition of SFBC transmission, and the anti-interference performance of the signal is improved.
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 introduced below.
FIG. 1 is a schematic diagram of an SFBC system with two antenna ports according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a communication scenario to which embodiments of the present invention relate;
fig. 3A-3B are resource mapping patterns of reference signals corresponding to respective antenna ports in the prior art according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for transmitting a reference signal according to an embodiment of the present invention;
fig. 5 is a schematic resource mapping diagram of a first reference signal and a second reference signal according to an embodiment of the present invention;
fig. 6A-6C are schematic diagrams illustrating a resource mapping method of a reference signal according to an embodiment of the present invention;
FIGS. 7A-7E are diagrams illustrating another resource mapping method for reference signals according to embodiments of the present invention;
fig. 8 is a flowchart illustrating another method for transmitting a reference signal according to an embodiment of the present invention;
fig. 9 is a block diagram of an apparatus according to an embodiment of the present invention.
Detailed Description
The terminology used in the description of the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention.
Multi-point SFBC transmission techniques may be used to improve the signal reliability of cell edge users and the throughput of edge cells. The multi-point SFBC Transmission is a Coordinated Multipoint Transmission (CoMP) technology, that is: two or more transmission points distributed at different geographical locations cooperatively adopt an SFBC transmission mode to transmit signals. As shown in fig. 2, two network devices 110 may respectively perform Precoding (Precoding) to generate one data stream, and then the two network devices 110 cooperatively transmit the 2 data streams generated by each to the terminal device 120 by using an SFBC transmission method.
It should be understood that one antenna port corresponds to one channel, and a receiving end (e.g., the terminal device 120 in fig. 2) needs to perform channel estimation and data demodulation according to a reference signal corresponding to the antenna port. Fig. 3A-3B illustrate resource mapping diagrams of a user equipment-specific Reference Signal (UE-RS) defined in the LTE communication protocol.
For the Resource mapping pattern corresponding to the antenna ports 7 and 8 shown in fig. 3A, on a symbol carrying the UE-RS in each Resource Block (RB), a first Resource Element (RE) not carrying the reference signal exists separately, that is: from the frequency domain, the RE has no adjacent RE, and is not suitable for transmitting service data by using the SFBC coding method. Similarly, for the resource mapping pattern corresponding to the antenna ports 9 and 10 shown in fig. 3B, on the symbol carrying the UE-RS in each resource block, the last resource element RE not carrying the reference signal exists separately, that is: from the frequency domain, the RE has no adjacent RE, and is not suitable for transmitting service data by using the SFBC coding method. It can be seen that the resource mapping manner of the UE-RS defined in the existing protocol shown in fig. 3A-3B makes resources that do not carry reference signals not well meet the SFBC transmission condition, and cannot sufficiently use the SFBC manner to transmit service data, which is not beneficial to improving the anti-interference performance of the entire communication system.
It should be understood that an antenna port refers to a logical port for transmitting signals, and there may not be a defined one-to-one correspondence with a physical antenna. One antenna port may be one physical transmit antenna, or may be a combination of 2 or more than 2 physical transmit antennas. In both cases, the Receiver (Receiver) at the receiving end does not resolve the signal from one antenna port, because from the receiving end, no matter whether the channel is formed by a single physical transmitting antenna or by combining multiple physical transmitting antennas, the reference signal corresponding to the antenna port defines the antenna port, and the receiving end can obtain the channel estimate 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, for example: a Global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long Term Evolution (Long Term Evolution, LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication System, a future 5G System, or the like.
For example, the communication system according to the 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 Transceiver Station (BTS) in a GSM system or a CDMA system, a Base station (NodeB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a Base station device, a small Base station device, and the like in a future 5G network, which is not limited in the present invention. Terminal device 120 supports CoMP, i.e., terminal device 120 can communicate with both network devices 110 in the figure; in a specific implementation, the terminal device 120 may be mobile or fixed, the terminal device 120 may communicate with one or more Core networks (Core networks) through a Radio Access Network (RAN), and the terminal device 120 may be referred to as an Access terminal, a terminal device, a user unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment; the terminal device 120 may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network, and so on.
For the communication system 100 shown in fig. 2, the terminal device 120 supports multipoint transmission, i.e. the terminal device 120 may communicate with a network device 110, such as a first base station, and may also communicate with another network device 110, such as a second base station. Optionally, the first base station 110 may serve as a serving base station, and optionally, the first base station 110 may send a Physical Downlink Control Channel (PDCCH) to the ue, or may send a Physical Downlink Shared Channel (PDSCH) to the ue; accordingly, when the first base station 110 is a serving base station, the second base station 110 may be a cooperative base station for transmitting a PDSCH to a user equipment; or the first base station is a cooperative base station, and the second base station is a serving base station, which is not limited in the embodiments of the present invention. Optionally, the first base station and the second base station may both be serving base stations, for example, in a scenario without a cell non-cell.
It is to be appreciated that network device 110 and network device 120 may correspond to transmission points, which may be QCL-compliant stations or non-QCL-compliant stations. The network device 110 and the network device 120 may be different network devices, or may be two transmission points of the same network device, such as two Radio frequency units, including a Remote Radio Unit (RRU). In LTE release 11(Rel-11), in order to support coordinated multiple Points Transmission/Reception (CoMP), that is, a user equipment may receive a PDCCH from a serving network side device and a PDSCH from the serving network side device or a cooperating network side device, a concept of Quasi-Co-Location (QCL) of an antenna port is introduced, and signals transmitted from the Quasi-Co-located antenna port may undergo the same large-scale fading, where the large-scale fading includes delay spread, doppler shift, average channel gain, and average delay.
Fig. 2 exemplarily shows that the communication system 100 includes 2 network devices 110 and 1 terminal device 120. It should be noted that the communication system 100 may include more than 2 network devices 110, and may also include more than 2 or 2 terminal devices 120, which is not limited in this embodiment of the present invention.
In order to solve the problems in the prior art, embodiments of the present invention provide a method for sending and receiving a reference signal. By implementing the method, under the scene of multipoint cooperative transmission, the resource which does not bear the reference signal can better meet the SFBC transmission condition, and the anti-interference performance of the signal is improved. In the embodiment of the present invention, the resource mapping pattern of the reference signal may be used to describe the distribution of REs carrying the reference signal in a resource block.
The embodiment of the invention relates to SFBC of two antenna ports, which is specifically called as follows: 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 (e.g., base stations), that is: a plurality of physical antennas of one network device are logically connected to the first antenna port and a plurality of physical antennas of another network device are logically connected to the second antenna port. In this application scenario, the reference signal transmission method provided in the embodiment of the present invention may be as shown in fig. 4, and includes:
s101, a first network device allocates resources for a first reference signal; 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 transmission point corresponds to the first network device, and the second transmission point corresponds to the second network device. Here, the resource mapping patterns of the first reference signal and the second reference signal will be described in detail later in conjunction with fig. 6A to 6C and fig. 7A to 7E.
S103, a first network device sends the first reference signal to a terminal device through the first antenna port on the resource element allocated to carry the first reference signal, and a second network device sends the second reference signal to the terminal device through the second antenna port on the resource element allocated to carry the second reference signal.
And S105, correspondingly, the terminal equipment receives the first reference signal and the second reference signal respectively according to the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal. Specifically, the terminal device may receive a first reference signal through a first antenna port corresponding to a first transmission point on a resource element carrying the first reference signal according to a resource mapping pattern of the first reference signal, receive a second reference signal through a second antenna port corresponding to a second transmission point on a resource element carrying the second reference signal according to a resource mapping pattern of the second reference signal, and finally correctly demodulate the service data according to the first reference signal and the second reference signal.
In this embodiment of the present invention, in order to enable resources not carrying reference signals to better perform SFBC transmission, in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain; the N and i are positive integers.
On one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain; j is a positive integer.
In this embodiment of the present invention, the first resource element is a resource element carrying at least one of the first reference signal and the second reference signal. That is, a first resource element may carry the first reference signal or the second reference signal; the first resource element may carry both the first and second reference signals. The second resource element is a resource element not carrying the first reference signal and not carrying the second reference signal.
In this embodiment of the present invention, a group of the first resource elements is composed of N consecutive adjacent first resource elements in the frequency domain.
In a specific implementation, N may be equal to 1. For example, as shown in fig. 5, on symbol 5 of an even slot, a group of the first resource elements is the resource element of one of the virtual circles carrying the first reference signal. For another example, at symbol 6 of an even slot, one of the first resource elements in a group of the virtual circles carries the second reference signal. The example is only one implementation manner of the embodiment of the present invention, and in practical application, a group of the first resource elements may also be 1 resource element that carries both the first reference signal and the second reference signal.
In a specific implementation, N may be greater than or equal to 2. For example, at symbol 5 of an odd slot, a group of the first resource elements includes one resource element carrying the first reference signal and one resource element carrying the second reference signal in the virtual circle. An example is merely an implementation manner of the embodiment of the present invention, in an actual application, a group of the first resource elements may further include 2 resource elements that carry both the first reference signal and the second reference signal, or 2 resource elements that carry either the first reference signal or the second reference signal, or more than 2 consecutive adjacent first resource elements in a frequency domain, which is not limited in the embodiment of the present invention.
In this embodiment of the present invention, the number of the resource block may be obtained by numbering the resource block for the entire system bandwidth, or may be obtained by numbering the resource block for the resource allocated to the terminal device. For example, the entire system resources include 100 RBs (RB0-RB99), and the resources allocated to the terminal device include 5 RBs (RB5-RB 9). Then, the jth resource block may be for the jth RB of the 100 RBs, and may also be for the jth RB of the 5 RBs.
In some possible implementation manners of the embodiment of the present invention, the even number of second resource elements spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the j +1 th resource block 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 +1 th resource block; or, odd second resource elements in the jth resource block and odd second resource elements in the j +1 th resource block.
In the following, the resource elements and resource blocks are abbreviated as RE and RB, respectively. The definition of the resource block RB, the resource element RE, etc. may refer to the protocol 3GPP TS 36.211 or related releases, such as evolved releases, which 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 the existing LTE communication system, or may also refer to a resource block defined in a future communication system (e.g. 5G), for example, because the future communication system (e.g. 5G) has higher transmission capability, 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.
The following describes in detail resource mapping manners of two main reference signals according to the embodiment of the present invention with reference to the accompanying drawings, assuming that the first antenna port and the second antenna port are an antenna port 7 and an antenna port 8 in an LTE communication protocol, respectively. Fig. 6A to 6C illustrate a resource mapping manner provided by the embodiment of the present invention, and fig. 7A to 7E illustrate another resource mapping manner provided by the 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 is not limited herein.
First, a resource mapping method of a reference signal provided by an embodiment of the present invention is described in detail with reference to fig. 6A to 6C. Implementing the resource mapping manner corresponding to fig. 6A-6C, and sending both the first reference signal and the second reference signal on the same RE, it is able to achieve full utilization of system resources; meanwhile, the two paths of reference signals transmitted on the same RE can keep orthogonality through orthogonal vectors, and mutual interference is avoided.
As shown in fig. 6A, the resource mapping pattern of the first reference signal (the resource mapping pattern corresponding to antenna port 7) is the same as the resource mapping pattern of the second reference signal (the resource mapping pattern corresponding to antenna port 8). That is, 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, an even number (e.g., 4) of second REs are spaced between the i-th group of the first REs and the i + 1-th group of the first REs on one symbol (e.g., symbol 5) carrying the first REs. Here, i is a positive integer. Therefore, the number of the second REs which are continuously adjacent in a single RB is even, SFBC transmission of service data on the even second REs which are continuously adjacent can be realized, and the anti-interference capability of the transmitted service data is improved.
It should be noted that fig. 6A only shows an exemplary case where a group of the first REs only includes 1 first RE, i.e., N is equal to 1. In practical applications, a group of the first REs may also include 2 or more than 2 of the first REs, that is, N may be greater than or equal to 2, which is not limited in this embodiment of the present invention.
It should be noted that fig. 6A only shows an example that 4 second REs are spaced between the ith group of the first RE and the i +1 th group of the first REs, in practical applications, the number of spaced second REs is not limited by fig. 6A, and may be an even number, and may be specifically related to the number of the first REs on a single symbol, and it can be understood that the more first REs, the less second REs are spaced between two adjacent first REs.
As shown in fig. 6A, for two RBs adjacent in the frequency domain, e.g., RB0 and RB1, an even number of second REs are spaced between a group of first REs of RB0 and a group of first REs of RB1 on one symbol (e.g., symbol 5) carrying the first REs. For example, on symbol 5, the first set of first REs of RB0 and the first set, the second set, and the third set of first REs of RB1 are all separated by an even number of second REs, specifically, 10, 14, and 18 second REs, respectively. The example is only one implementation manner of the embodiment of the present invention, and may also be different in practical applications, and should not be construed as a limitation. Therefore, the number of the second REs which are continuously adjacent between the adjacent 2 RBs is ensured to be even, SFBC transmission of service data on the even second REs which are continuously adjacent can be realized, and the anti-interference capability of the transmitted service data is improved.
In a specific implementation, as shown in fig. 6B, a difference between a carrier number where an ith first RE in the odd-numbered RBs is located and a carrier number where an ith first RE in the even-numbered RBs is located is an odd number, so that: on a single symbol carrying said first REs, for the adjacently numbered 2 RBs, the last said first RE in the preceding RB is spaced from the first said first RE in the following RB by an even number of said second REs. Here, i is a positive integer.
For example, on symbol 6 carrying the first RE, the 1 st of the first R in odd numbered RBs is on subcarrier number 0 and the 1 st of the first RE in even numbered RBs is on subcarrier number 1, may be such that: at symbol 6, the last first RE in RB0 is separated from the first RE in RB1 by 2 second REs, so that SFBC transmission of traffic data on the 2 frequency-domain adjacent second REs can be achieved.
In practical applications, as another variation of fig. 6B, the resource mapping patterns corresponding to the odd numbered RBs shown in fig. 6B may be interchanged with the resource mapping patterns corresponding to the even numbered RBs shown in fig. 6B.
For the resource mapping diagrams shown in fig. 6A and 6B, the signal sequence r of the first reference signal or the second reference signal can be mapped to complex modulation symbols according to the following algorithm
Figure GDA0002270426360000141
The method comprises the following steps:
Figure GDA0002270426360000142
Figure GDA0002270426360000143
Figure GDA0002270426360000144
k'＝nPRBmod2 p∈{7,8}
Figure GDA0002270426360000151
Figure GDA0002270426360000152
m'＝0,1,2
wherein 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 without interfering with each other. For the definition and physical meaning of each parameter in the above algorithm, please refer to standard protocol 3GPP TS 36.211, which is not described herein.
As shown in fig. 6C, by using the resource mapping manner corresponding to the odd-numbered RB and the even-numbered RB shown in fig. 6B, on a single symbol (e.g., symbol 6 of an odd-numbered slot) carrying the first RE, the last first RE of RB1 is separated from the first RE of RB2 by 0 second REs in the frequency domain, and the last first RE of RB2 is separated from the first RE of RB3 by 2 second REs in the frequency domain, it is avoided that the odd second REs do not appear at (or near) sidebands of two RBs, and SFBC transmission of traffic data can be achieved at (or near) sidebands of two RBs, thereby improving the interference immunity of the transmitted traffic data.
In the embodiment of the present invention, in order to enable the reference signal to more objectively and more comprehensively reflect the channel environment of the communication system, the REs carrying the first reference signal (or the second reference signal) are preferably uniformly distributed within the system bandwidth. That is, any two adjacent first REs are spaced apart by a fixed even number (e.g., "4") of the second REs on a single symbol carrying the first REs.
Next, another resource mapping method for reference signals provided by the embodiment of the present invention is described in detail with reference to fig. 7A to 7E. By implementing the resource mapping manner corresponding to fig. 7A to 7E, and sending the first reference signal and the second reference signal on different REs, mutual interference caused by different transmission delays of the first reference signal from the first antenna port and the second reference signal from the second antenna port can be avoided. That is, in the other resource mapping manner, the first RE is a resource element carrying the first reference signal or the second reference signal.
As shown in fig. 7A, for a single RB, on one symbol carrying the first REs, the first REs are grouped and adjacent in the frequency domain, N consecutive and adjacent first REs in the frequency domain are in one group (one group corresponds to one dashed circle), and one group of the first REs includes 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 (e.g., symbol 5), the first REs may be adjacent to each other in the frequency domain, and 2 adjacent first REs are in a group, where a group of the first REs includes: 1 RE carrying the first reference signal and 1 RE carrying the second reference signal.
The example is only one implementation manner of the embodiment of the present invention, and in practical applications, a group of the first REs may further include more than 2 consecutive adjacent first REs, which is not limited herein.
For a single RB, an even number of the second REs are spaced between the ith group of the first REs and the i +1 th group of the first REs on one symbol carrying the first REs. Wherein i is a positive integer. For example, as shown in fig. 7A, on symbol 5, 2 second REs are spaced between the first RE of the 1 st group and the first RE of the 2 nd group. Therefore, the number of the second REs which are continuously adjacent in a single RB is even, SFBC transmission of service data on the even second REs which are continuously adjacent can be realized, and the anti-interference capability of the transmitted service data is improved.
As shown in fig. 7B, for two RBs adjacent in the frequency domain, e.g., RB0 and RB1, an even number of second REs are spaced between a group of first REs of RB0 and a group of first REs of RB1 on one symbol (e.g., symbol 5) carrying the first REs. For example, on symbol 5, the first set of first REs of RB0 and the first set, the second set, and the third set of first REs of RB1 are all separated by an even number of second REs, specifically, 6, 8, and 10 second REs, respectively. The example is only one implementation manner of the embodiment of the present invention, and may also be different in practical applications, and should not be construed as a limitation. Therefore, the number of the second REs which are continuously adjacent between the adjacent 2 RBs is ensured to be even, SFBC transmission of service data on the even second REs which are continuously adjacent can be realized, and the anti-interference capability of the transmitted service data is improved.
In the embodiment of the present invention, the REs carrying the first reference signal and the REs carrying the second reference signal may present the following two main arrangement modes:
in one possible arrangement, for a group of subcarriers corresponding to a group of the first REs, a single subcarrier in the group of subcarriers carries only the first reference signal or the second reference signal; and, adjacent 2 subcarriers in the group of subcarriers carry the first reference signal and the second reference signal, respectively.
For example, as shown in fig. 7A, the group of subcarriers corresponding to the first RE in group 1 includes: subcarrier 2 and subcarrier 3, where subcarrier 2 is only used for carrying the second reference signal and subcarrier 3 is only used for carrying 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 complex modulation symbols according to the following algorithm
Figure GDA0002270426360000171
The method comprises the following steps:
Figure GDA0002270426360000172
Figure GDA0002270426360000173
Figure GDA0002270426360000174
Figure GDA0002270426360000175
Figure GDA0002270426360000176
Figure GDA0002270426360000177
m'＝0,1,2
where w is an orthogonal vector, the orthogonal vector w may not be embodied in the mapping algorithm of the signal sequence in practical application. For the definition and physical meaning of each parameter in the above algorithm, please refer to standard protocol 3GPP TS 36.211, which is not described herein.
It should be noted that fig. 7A only shows an implementation manner of the embodiment of the present invention by way of example, and may also be different in practical applications, for example, the arrangement manner is shown in fig. 7D, and the embodiment of the present invention is not limited.
In another possible arrangement, for a group of subcarriers corresponding to a group of the first REs, a single subcarrier in the group of subcarriers carries the first reference signal and the second reference signal; and the single subcarrier is used for carrying one of the first reference signal and the second reference signal in an even time slot, and is used for carrying the other of the first reference signal and the second reference signal in an odd time slot.
For example, as shown in fig. 7C, the group of subcarriers corresponding to the first RE in group 1 includes: subcarrier 2 and subcarrier 3, where subcarrier 2 is used to carry the second reference signal in an even timeslot, and subcarrier 2 is used to carry the first reference signal in an odd timeslot; subcarrier 3 is used to carry the first reference signal in even slots and subcarrier 3 is used to carry the second reference signal in odd slots.
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 complex modulation symbols according to the following algorithm
Figure GDA0002270426360000181
The method comprises the following steps:
Figure GDA0002270426360000182
Figure GDA0002270426360000183
Figure GDA0002270426360000184
Figure GDA0002270426360000185
Figure GDA0002270426360000186
Figure GDA0002270426360000187
m'＝0,1,2
where w is an orthogonal vector, the orthogonal vector w may not be embodied in the mapping algorithm of the signal sequence in practical application. For the definition and physical meaning of each parameter in the above algorithm, please refer to standard protocol 3GPP TS 36.211, which is not described herein.
It should be noted that fig. 7C only shows an implementation manner of the embodiment of the present invention by way of example, and may also be different in practical applications, for example, the arrangement manner is shown in fig. 7E, and the embodiment of the present invention is not limited.
In this embodiment of the present invention, the symbol used for carrying the first reference signal is the same as the symbol used 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 may be selected from the first group of symbols. The first set of symbols may be a set of symbols for carrying reference signals for the normal cyclic prefix specified by a protocol, e.g. symbols 2, 3, 5, 6 specified in standard protocol 3GPP TS 36.211. It should be noted that the protocol may also predefine other symbols for carrying reference signals under a normal cyclic prefix, which is not limited herein.
In particular, in case of using the extended cyclic prefix, the same symbol may be selected from the second set of symbols. The second set of symbols may be a set of symbols specified by a preset protocol for the extended cyclic prefix for carrying reference signals, e.g., symbols 2, 3, 4, 5 specified in standard protocol 3GPP TS 36.211. It should be noted that the protocol may also predefine other symbols for carrying reference signals 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 spaced between any adjacent 2 groups of the first REs in a single RB is a fixed even number, and the first REs carrying the first reference signals or the second reference signals can be uniformly distributed in a system bandwidth, so that the channel environment of the communication system can be more objectively and more comprehensively reflected by the reference signals.
In this embodiment of the present invention, after determining the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal, the first network device and the second network device need to notify the terminal device of the resource mapping patterns of the two reference signals, so that the terminal device can receive the first reference signal and the second reference signal on the RE carrying the first reference signal and the second reference signal, and finally correctly demodulate service data according to the first reference signal and the second reference signal.
In an informing manner of the embodiment of the present invention, resource indication information may be sent to a terminal device through dynamic signaling (e.g., scheduling signaling) or semi-static signaling (e.g., RRC signaling), where 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 one possible implementation, if the terminal device side knows a set of resource mapping patterns, where the set of resource mapping patterns includes resource mapping patterns to which the first reference signal and the second reference signal may correspond, the index may be a number (ID) of the resource mapping pattern within the set.
In another possible implementation manner, if a set of resource mapping patterns and antenna ports corresponding to the respective resource mapping patterns are known by the terminal device side, where the set of resource mapping patterns includes resource mapping patterns to which the first reference signal and the second reference signal may correspond, the index may be identification information of the antenna ports corresponding to the resource mapping patterns. It should be noted that the identification information of the antenna port includes, but is not limited to, a port number of the antenna port, and other information capable of characterizing the antenna port may also be used as the identification information of the antenna port, which is not limited herein.
In yet another implementation, the index may be a number of the RB. In a specific implementation, one RB number itself may also be used to indicate a resource mapping pattern of a reference signal corresponding to the RB. For example, the resource mapping pattern of the first reference signal and the second reference signal corresponding to RB1 is shown in the right drawing of fig. 6B; the resource mapping pattern of the first reference signal and the second reference signal corresponding to RB0 is shown in the left figure of fig. 6B. For another example, the resource mapping pattern of the first reference signal corresponding to RB1 is shown in fig. 7A; the resource mapping pattern of the first reference signal and the second reference signal corresponding to RB0 is shown in fig. 7C. The examples are intended to illustrate 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 characterize the resource mapping pattern of the first reference signal and the second reference signal, which is not limited herein.
In some possible implementation scenarios, for example, the resource mapping approach shown in fig. 6A-6C may be such that: the resource mapping patterns of the first and second reference signals corresponding to odd and even numbered RBs respectively are the same as the resource mapping patterns of the reference signals corresponding to two antenna ports (antenna ports 9 and 7) defined in the existing protocol (e.g. 3GPP TS 36.211). Therefore, the resource mapping patterns of the first reference signal and the second reference signal corresponding to the odd-numbered RB and the even-numbered RB, respectively, may be indicated by using antenna port 9 and antenna port 7 defined in the 3GPP TS 36.211 protocol.
For some possible implementation scenarios described above, the index included in the resource indication information may be port numbers of the two antenna ports defined in an existing protocol.
For some possible implementation scenarios described above, the resource indication information may also include: a first indicator bit.
If the first indicator bit is equal to a first value, it means: the resource mapping patterns of the first and second reference signals corresponding to odd numbered RBs are the same as the resource mapping pattern of the reference signal corresponding to antenna port 9, and the resource mapping patterns of the first and second reference signals corresponding to even numbered RBs are the same as the resource mapping pattern of the reference signal corresponding to antenna port 7;
if the first indicator bit is not equal to the first value, it means: the resource mapping patterns of the first and second reference signals corresponding to odd numbered RBs are the same as the resource mapping pattern of the reference signal corresponding to antenna port 7, and the resource mapping patterns of the first and second reference signals corresponding to even numbered RBs are the same as the resource mapping pattern of the reference signal corresponding to 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, and in practical applications, the two antenna ports defined in the existing protocol may also be other antenna ports, which is not limited herein.
In a specific implementation, the first indication bit may be 1 bit, and in practical application, the first indication bit may also be an indication bit of multiple bits, and the first indication bit may also be an indication bit of another data type, such as a character, which is not limited herein.
For some possible implementation scenarios described above, in order to be compatible with the resource mapping manner of the reference signal defined in the preset protocol, the resource indication information may further include: the second indicating bit.
If the second indicator bit is equal to a second value, then it indicates: 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, and 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, then it represents: the resource mapping pattern of the first reference signal corresponding to odd-numbered RB and even-numbered RB respectively is characterized by two antenna ports (e.g., antenna port 9 and antenna port 7) defined in the existing protocol.
In a specific implementation, the first indication bit may be 1 bit, and in practical application, the second indication bit may also be an indication bit of multiple bits, and the second indication bit may also be an indication bit of other data types, such as a character, which is not limited herein.
Specifically, the resource indication information may also directly include: the indication information of the subcarriers carrying the first reference signal and the second reference signal and the indication information of the symbols carrying the first reference signal and the second reference signal. It is to be understood that one RE carrying a reference signal may be characterized by one subcarrier carrying the reference signal and one symbol carrying the reference signal.
In order to save signaling consumption and save air interface resources, the embodiment of the present invention may also statically define with the terminal device through a protocol: a resource mapping pattern of the first reference signal and a resource mapping pattern of the second reference signal. For example, by agreement static contract: the resource mapping pattern of the first reference signal and the second reference signal corresponding to odd RBs is shown in the right drawing of fig. 6B; the resource mapping pattern of the first reference signal and the second reference signal corresponding to even RBs is shown in the left diagram of fig. 6B. The examples are intended to illustrate embodiments of the invention and should not be construed as limiting.
In a specific implementation, one RB number itself may also be used to indicate a resource mapping pattern of a reference signal corresponding to the RB. For example, by agreement static contract: the resource mapping pattern of the first reference signal and the second reference signal corresponding to RB1 is shown in the right drawing of fig. 6B; the resource mapping pattern of the first reference signal and the second reference signal corresponding to RB0 is shown in the left figure of fig. 6B. As another example, by agreement static contract: the resource mapping pattern of the first reference signal and the second reference signal corresponding to RB1 is shown in fig. 7A; the resource mapping pattern of the first reference signal and the second reference signal corresponding to RB0 is shown in fig. 7C. The examples are intended to illustrate 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 (e.g., a base station), that is: the multiple physical antennas of a network device logically have 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 embodiment of the method in fig. 4 may also be represented by the same network device.
Implementing embodiments of the present invention by having, in the resource mapping pattern of the first reference signal and the second reference signal: n first resource elements which are continuously adjacent on the frequency domain form a group; on one symbol carrying the first resource elements, even second resource elements are spaced between the ith group of first resource elements and the (i + 1) th group of first resource elements, and even second resource elements are spaced between one group of first resource elements of the jth resource block and one group of first resource elements in the (j + 1) th resource 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 which does not carry the reference signal can better meet the condition of SFBC transmission, and the anti-interference performance of the signal is improved.
Based on the same inventive concept, the embodiment of the present invention further provides an apparatus (as shown in fig. 9) for implementing the method described in the foregoing embodiment of fig. 4.
When the apparatus is a network side device, the processor 10 is configured to allocate resources to a first reference signal and a second reference signal, where 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; a transmitter 20, configured to transmit the first reference signal to a terminal device through the first antenna port on the resource element allocated to carry the first reference signal, and transmit the second reference signal to the terminal device through the second antenna port on the resource element allocated to carry 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 specifically made to the foregoing method embodiments, and details are not repeated here.
Optionally, the transmitter 20 is configured to transmit resource indication information to the terminal device through 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 a resource mapping pattern of the second reference signal.
When the apparatus is a terminal device, the receiver 30 is configured to receive a first reference signal through a first antenna port corresponding to a first transmission point on resource elements carrying the first reference signal according to a resource mapping pattern of the first reference signal, and receive a second reference signal through a second antenna port corresponding to a second transmission point on resource elements carrying the second reference signal according to a 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 embodiments, and details are not repeated here.
It is to be understood that, when the above apparatus is a network side device, the apparatus may further include a communication interface for implementing communication between the network side device and other network nodes, where the other network nodes include other network side devices or a core network node, which is not limited herein.
Based on the same inventive concept, the embodiment of the present invention further provides a signal transmission apparatus, which includes functional modules for performing the steps of the method described in the foregoing embodiment of fig. 4.
Various modifications and specific examples of the method described in the foregoing embodiment in fig. 4 are also applicable to the signal transmission apparatus in this embodiment and the apparatus in fig. 9, and a person skilled in the art can clearly know the implementation method of the signal transmission apparatus in this embodiment and the apparatus in fig. 9 through the detailed description of the method described in the foregoing embodiment in fig. 4, so that the detailed description is omitted here for the sake of brevity.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (24)

1. A method for transmitting a reference signal, comprising:
allocating resources for a first reference signal and a second reference signal, the first reference signal corresponding to a first antenna port of a first transmission point, the second reference signal corresponding to a second antenna port of a second transmission point; in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain;
on one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain;
wherein, the 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 a resource element not carrying the first reference signal and not carrying the second reference signal;
transmitting the first reference signal to a terminal device through the first antenna port on the resource element allocated to carry the first reference signal, and transmitting the second reference signal to the terminal device through the second antenna port on the resource element allocated to carry the second reference signal.
2. The method of claim 1, wherein an even number of the second resource elements spaced between a set of first resource elements in the jth resource block and a set of first resource elements in the j +1 th resource block comprises:
an even number of second resource elements in the jth resource block and an even number of second resource elements in the j +1 th resource block; or, odd second resource elements in the jth resource block and odd second resource elements in the j +1 th resource block.
3. The method of 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.
4. The method of claim 3, wherein N is 1.
5. The method of claim 1 or 2, wherein the first resource element is a resource element carrying the first reference signal or the second reference signal.
6. The method of claim 5, wherein a 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.
7. A method for receiving a reference signal, comprising:
receiving a first reference signal through a first antenna port corresponding to a first transmission point on resource elements carrying the first reference signal according to a resource mapping pattern of the first reference signal, and receiving a second reference signal through a second antenna port corresponding to a second transmission point on resource elements carrying the second reference signal according to a resource mapping pattern of the second reference signal;
in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain;
on one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain;
wherein, the 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 a resource element not carrying the first reference signal and not carrying the second reference signal.
8. The method of claim 7, wherein the even number of the second resource elements spaced between a set of first resource elements in the jth resource block and a set of first resource elements in the j +1 th resource block comprises:
an even number of second resource elements in the jth resource block and an even number of second resource elements in the j +1 th resource block; or, odd second resource elements in the jth resource block and odd second resource elements in the j +1 th resource block.
9. The method of 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.
10. The method of claim 9, wherein N is 1.
11. The method of claim 7 or 8, wherein the first resource element is a resource element carrying the first reference signal or the second reference signal.
12. The method of claim 11, wherein a 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.
13. A network-side device, comprising:
a processor configured to allocate resources for a first reference signal and a second reference signal, the first reference signal corresponding to a first antenna port of a first transmission point, the second reference signal corresponding to a second antenna port of a second transmission point; in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain;
on one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain;
wherein, the 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 a resource element not carrying the first reference signal and not carrying the second reference signal;
a transmitter, configured to transmit the first reference signal to a terminal device through the first antenna port on the resource element allocated to carry the first reference signal, and transmit the second reference signal to the terminal device through the second antenna port on the resource element allocated to carry the second reference signal.
14. The network-side device of claim 13, wherein the even number of the second resource elements spaced between the set of first resource elements in the jth resource block and the set of first resource elements in the j +1 th resource block comprises:
an even number of second resource elements in the jth resource block and an even number of second resource elements in the j +1 th resource block; or, odd second resource elements in the jth resource block and odd second resource elements in the j +1 th resource block.
15. The network-side device of claim 13 or 14, wherein the first resource element is a resource element that carries both the first reference signal and the second reference signal.
16. The network-side device of claim 15, wherein N is 1.
17. The network-side device of claim 13 or 14, wherein the first resource element is a resource element carrying the first reference signal or the second reference signal.
18. The network-side device of claim 17, wherein the set of first resource elements comprises a first resource element carrying the first reference signal and a first resource element carrying the second reference signal.
19. A terminal device, comprising:
a receiver configured to receive a first reference signal through a first antenna port corresponding to a first transmission point on resource elements carrying the first reference signal according to a resource mapping pattern of the first reference signal, and receive a second reference signal through a second antenna port corresponding to a second transmission point on resource elements carrying the second reference signal according to a resource mapping pattern of the second reference signal;
in the resource mapping pattern of the first reference signal and the resource mapping pattern of the second reference signal:
in one resource block, on one symbol carrying first resource elements, the first resource elements which are continuously adjacent on N frequency domains form a group; an even number of second resource elements are arranged between the ith group of the first resource elements and the (i + 1) th group of the first resource elements which are adjacent in the frequency domain;
on one symbol carrying the first resource elements, an even number of second resource elements are spaced between a group of first resource elements in the jth resource block and a group of first resource elements in the (j + 1) th resource block; the jth resource block is adjacent to the (j + 1) th resource block in the frequency domain;
wherein, the 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 a resource element not carrying the first reference signal and not carrying the second reference signal.
20. The terminal device of claim 19, wherein an even number of the second resource elements spaced between a set of first resource elements in the jth resource block and a set of first resource elements in the j +1 th resource block comprises:
an even number of second resource elements in the jth resource block and an even number of second resource elements in the j +1 th resource block; or, odd second resource elements in the jth resource block and odd second resource elements in the j +1 th resource block.
21. The terminal device of 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.
22. The terminal device of claim 21, wherein N is 1.
23. The terminal device of claim 19 or 20, wherein the first resource element is a resource element carrying the first reference signal or the second reference signal.
24. The terminal device of claim 23, wherein the set of the first resource elements includes a first resource element carrying the first reference signal and a first resource element carrying the second reference signal.
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