CN107666380B - A method and base station for sending downlink pilot signal in a private network communication system - Google Patents

Abstract

The invention discloses a method and a base station for sending downlink pilot signals in a private network communication system, wherein the method comprises the steps of modulating downlink pilot signals into th downlink signals according to the th distribution of pilot resources preset in downlink resources when a th port and a second port are adopted to send the downlink pilot signals so as to send th downlink signals through a th port, and modulating the downlink pilot signals into second downlink signals according to the second distribution of the pilot resources preset in the downlink resources so as to send the second downlink signals through the second port.

Description

A method and base station for sending downlink pilot signal in a private network communication system

technical field

The present invention relates to the field of communication technologies, in particular to a method and a base station for sending downlink pilot signals in a private network communication system.

Background technique

Private network communication usually carries a variety of services. The private network communication system occupies discontinuous spectrum bandwidth (referred to as frequency band), and each frequency band of 25kHz bandwidth is called a subband, and the private network communication system occupies a maximum of 480 subbands. , the center frequency of each sub-band can be called a frequency point, and the sub-bands are numbered in ascending order of frequency: 0, 1, 2..., 479, and the number can be called an absolute frequency point.

A radio frame of each subband of the private network communication system is 25 ms long, and includes 45 orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols. Figure 1 shows the structure of resources occupied by a radio frame in a private network communication system. Each column represents an OFDM symbol, and each row represents a subcarrier. The number of subcarriers contained in a subband in Figure 1 is 10, and the downlink resources in Figure 1 Occupying 13 OFDM symbols, these 13 OFDM symbols can also become a downlink resource block.

绝对频点索引n_PRB、OFDM符号的编号l来确定，具体地：FIG. 2 is a schematic diagram of resources occupied by downlink pilot signals in one subband of a private network communication system. Each OFDM symbol has a resource element (Resouce Element, RE) occupied by pilot signals, which may also be referred to as reference signals. A signal (Reference Signal, RS) is a known signal provided by the transmitter to the receiver for channel estimation or channel sounding. The position of the resource occupied by the pilot signal is (k, l, n _PRB ), according to the cell identification

The absolute frequency index n _PRB and the number l of the OFDM symbol are determined, specifically:

l=0,1,...,12

下行资源块的个数由专网通信系统的带宽决定。Among them, the number of subcarriers (SubCarrier, SC) included in a resource block RB

The number of downlink resource blocks It is determined by the bandwidth of the private network communication system.

When the private network communication system adopts two-port transmission in order to improve downlink coverage, the above pilot scheme is not suitable for two-port transmission, but only for single-port transmission. For this reason, the pilot frequency needs to be redesigned to support two-port transmission.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention proposes a method and a base station for sending downlink pilot signals in a private network communication system to overcome the above problems.

In a first aspect, the present invention provides a method for sending downlink pilot signals in a private network communication system, including:

When using the first port and the second port to send the downlink pilot signal, the downlink pilot signal is modulated into the first downlink signal according to the preset first distribution of pilot resources in the downlink resources, so as to carry the downlink pilot signal. sending the first downlink signal of the downlink pilot signal through the first port;

When the first port and the second port are used to send the downlink pilot signal, the downlink pilot signal is modulated into the second downlink signal according to the preset second distribution of pilot resources in the downlink resources, so as to carry the downlink pilot signal. The second downlink signal of the downlink pilot signal is sent through the second port.

The first distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=1,5;

l=1,2,11,12;

n _PRB = 0,1,...,479;

The second distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=3,7;

l=1,2,11,12;

n _PRB = 0,1,...,479.

In a second aspect, the present invention provides a base station, including:

a first processing unit, configured to modulate the downlink pilot signal to the first downlink according to the first distribution of pilot resources preset in the downlink resources when using the first port and the second port to send the downlink pilot signal In the signal, the first downlink signal carrying the downlink pilot signal is sent through the first port;

The second processing unit is configured to modulate the downlink pilot signal to a second downlink signal according to the second distribution of pilot resources preset in the downlink resources when the downlink pilot signal is sent by using the first port and the second port , so that the second downlink signal carrying the downlink pilot signal is sent through the second port.

The first distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=1,5;

l=1,2,11,12;

n _PRB = 0,1,...,479;

The second distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=3,7;

l=1,2,11,12;

n _PRB = 0,1,...,479.

In a third aspect, the present invention provides a method for sending downlink pilot signals in a private network communication system, including:

When the first port and the second port are used to send the downlink pilot signal, the downlink pilot signal is modulated into the first downlink signal according to the preset second distribution of pilot resources in the downlink resources, so as to carry the downlink pilot signal. sending the first downlink signal of the downlink pilot signal through the first port;

When using the first port and the second port to send the downlink pilot signal, the downlink pilot signal is modulated into the second downlink signal according to the preset first distribution of pilot resources in the downlink resources, so as to carry The second downlink signal of the downlink pilot signal is sent through the second port.

The first distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=1,5;

l=1,2,11,12;

n _PRB = 0,1,...,479;

The second distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=3,7;

l=1,2,11,12;

n _PRB = 0,1,...,479.

In a fourth aspect, the present invention provides a base station, including:

The third processing unit is configured to modulate the downlink pilot signal to the first downlink according to the preset second distribution of pilot resources in the downlink resources when using the first port and the second port to send the downlink pilot signal In the signal, the first downlink signal carrying the downlink pilot signal is sent through the first port;

a fourth processing unit, configured to modulate the downlink pilot signal to a second downlink signal according to the first distribution of pilot resources preset in the downlink resources when the downlink pilot signal is sent by using the first port and the second port , so that the second downlink signal carrying the downlink pilot signal is sent through the second port.

The first distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=1,5;

l=1,2,11,12;

n _PRB = 0,1,...,479;

The second distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=3,7;

l=1,2,11,12;

n _PRB = 0,1,...,479.

Compared with the prior art, the method and base station for sending a downlink pilot signal in a private network communication system proposed by the present invention enables the private network communication system to use two-port transmission by distributing the two pilot frequency resources (also referred to as pilot signals). The two-port pilot sequence can be distinguished, thereby improving the receiving performance of the private network communication system through the channel estimation of the two ports.

Description of drawings

1 is a schematic structural diagram of resources occupied by radio frames in a private network communication system in the prior art;

2 is a schematic diagram of resources occupied by downlink pilot signals in a subband of a private network communication system in the prior art;

3 is a flowchart of a method for sending downlink pilot signals in a private network communication system provided by an embodiment of the present invention;

4 is a schematic diagram of a first distribution of pilot resources involved in an embodiment of the present invention;

5 is a schematic diagram of a second distribution of pilot resources involved in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention;

7 is a flowchart of a method for sending a downlink pilot signal in another private network communication system provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another base station according to an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, 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. Obviously, the described embodiments are the Some, but not all, embodiments are disclosed.

It should be noted that, in this document, the words "first" to "fourth" are only used to distinguish the same names, rather than implying the relationship or sequence between these names.

As shown in FIG. 3 , this embodiment discloses a method for sending a downlink pilot signal in a private network communication system, including the following steps 301 and 302:

301. When using the first port and the second port to send a downlink pilot signal, modulate the downlink pilot signal into a first downlink signal according to a preset first distribution of pilot resources in the downlink resources, so as to convert the downlink pilot signal into a first downlink signal. sending the first downlink signal carrying the downlink pilot signal through the first port;

302. When using the first port and the second port to send the downlink pilot signal, modulate the downlink pilot signal into the second downlink signal according to the preset second distribution of pilot resources in the downlink resources, so as to carry the The second downlink signal with the downlink pilot signal is sent through the second port.

Compared with the prior art, the method and base station for sending downlink pilot signals in a private network communication system proposed in this embodiment enable the private network communication system to transmit by two ports by distributing the two pilot resources (also referred to as The pilot pattern) corresponds to one transmit port respectively, and the two-port pilot sequence can be distinguished, thereby improving the reception performance of the private network communication system through the channel estimation of the two ports.

In a specific example, as shown in FIG. 4 , the first distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=1,5;

l=1,2,11,12;

n _PRB = 0,1,...,479;

As shown in FIG. 5 , the second distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=3,7;

l=1,2,11,12;

n _PRB = 0,1,...,479.

To sum up, this embodiment designs a downlink reference signal suitable for the private network communication system by comprehensively considering the frame structure, spectrum distribution, subband bandwidth and other factors of the private network communication system. The simple structure and compact reference signal position can not only meet the system business requirements, but also make channel estimation, noise variance estimation, frequency offset and timing offset algorithms more accurate, and guarantee system performance.

As shown in FIG. 6, this embodiment discloses a base station, which may include: a first processing unit 61 and a second processing unit 62:

The first processing unit 61 is configured to, when using the first port and the second port to send the downlink pilot signal, modulate the downlink pilot signal to the first downlink pilot signal according to the preset first distribution of pilot resources in the downlink resources. In the downlink signal, the first downlink signal carrying the downlink pilot signal is sent through the first port;

The second processing unit is configured to modulate the downlink pilot signal to a second downlink signal according to the second distribution of pilot resources preset in the downlink resources when the downlink pilot signal is sent by using the first port and the second port , so that the second downlink signal carrying the downlink pilot signal is sent through the second port.

In a specific example, as shown in FIG. 4 , the first distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=1,5;

l=1,2,11,12;

n _PRB = 0,1,...,479;

As shown in FIG. 5 , the second distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=3,7;

l=1,2,11,12;

n _PRB = 0,1,...,479.

As shown in FIG. 7 , this embodiment discloses a method for sending downlink pilot signals in a private network communication system, which may include steps 701 and 702:

701. When using the first port and the second port to send a downlink pilot signal, modulate the downlink pilot signal into a first downlink signal according to a preset second distribution of pilot resources in the downlink resources, so as to convert the downlink pilot signal into a first downlink signal. sending the first downlink signal carrying the downlink pilot signal through the first port;

702. When using the first port and the second port to send the downlink pilot signal, modulate the downlink pilot signal into the second downlink signal according to the preset first distribution of pilot resources in the downlink resources, so as to carry the The second downlink signal with the downlink pilot signal is sent through the second port.

In a specific example, as shown in FIG. 4 , the first distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=1,5;

l=1,2,11,12;

n _PRB = 0,1,...,479;

As shown in FIG. 5 , the second distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=3,7;

l=1,2,11,12;

n _PRB = 0,1,...,479.

As shown in FIG. 8, a base station includes: a third processing unit 81 and a fourth processing unit 82:

The third processing unit 81 is configured to, when using the first port and the second port to send the downlink pilot signal, modulate the downlink pilot signal to the first downlink pilot signal according to the preset second distribution of pilot resources in the downlink resources In the downlink signal, the first downlink signal carrying the downlink pilot signal is sent through the first port;

The fourth processing unit 82 is configured to modulate the downlink pilot signal to the second downlink according to the preset first distribution of pilot resources in the downlink resources when the downlink pilot signal is sent by using the first port and the second port In the signal, the second downlink signal carrying the downlink pilot signal is sent through the second port.

In a specific example, as shown in FIG. 4 , the first distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=1,5;

l=1,2,11,12;

n _PRB = 0,1,...,479;

As shown in FIG. 5 , the second distribution of the pilot resources is as follows:

The position of the pilot resource is (k, l, n _PRB );

k=3,7;

l=1,2,11,12;

n _PRB = 0,1,...,479.

It will be understood by those skilled in the art that the units in the embodiments may be combined into one unit, and furthermore they may be divided into multiple subunits. All features disclosed in this specification and all processes or elements of any method or apparatus so disclosed may be combined in any combination, except to the extent that at least some of such features and/or procedures or units are mutually exclusive. Unless expressly stated otherwise, each feature disclosed in this specification may be replaced by alternative features serving the same, equivalent or similar purpose.

It will be understood by those skilled in the art that although some of the embodiments described herein include certain features, but not others, included in other embodiments, that combinations of features of the different embodiments are intended to be within the scope of the present invention And form different embodiments.

Those skilled in the art may understand that each unit in the embodiments may be implemented by hardware, or by software modules running on one or more processors, or by a combination thereof. Those skilled in the art will understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components according to the embodiments of the present invention. The present invention can also be implemented as apparatus or apparatus programs (eg, computer programs and computer program products) for performing part or all of the methods described herein.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, various modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope of the appended claims within the limits of the requirements.

Claims (4)

1, method for sending downlink pilot signal in private network communication system, comprising:

when an th port and a second port are adopted to send downlink pilot signals, the downlink pilot signals are modulated into th downlink signals according to the th distribution of preset pilot resources in the downlink resources, so that th downlink signals carrying the downlink pilot signals are sent through a th port;

when an th port and a second port are used for sending downlink pilot signals, modulating the downlink pilot signals into second downlink signals according to a preset second distribution of pilot resources in the downlink resources, so as to send the second downlink signals carrying the downlink pilot signals through the second port;

the pilot resource is distributed as follows:

the position of the pilot frequency resource is (k, l, n)_PRB)；

k＝1,5；

l＝1,2,11,12；

n_PRB＝0,1,...,479；

The second distribution of pilot resources is as follows:

the position of the pilot frequency resource is (k, l, n)_PRB)；

k＝3,7；

l＝1,2,11,12；

n_PRB＝0,1,...,479。

A base station of the type , comprising:

an th processing unit, configured to modulate a downlink pilot signal into a th downlink signal according to th distribution of a preset pilot resource in downlink resources when the th port and the second port are used to send the downlink pilot signal, so as to send a th downlink signal carrying the downlink pilot signal through the th port;

a second processing unit, configured to modulate a downlink pilot signal into a second downlink signal according to a second distribution of pilot resources preset in downlink resources when a th port and a second port are used to send the downlink pilot signal, so as to send the second downlink signal carrying the downlink pilot signal through the second port;

the pilot resource is distributed as follows:

the position of the pilot frequency resource is (k, l, n)_PRB)；

k＝1,5；

l＝1,2,11,12；

n_PRB＝0,1,...,479；

The second distribution of pilot resources is as follows:

the position of the pilot frequency resource is (k, l, n)_PRB)；

k＝3,7；

l＝1,2,11,12；

n_PRB＝0,1,...,479。

The method for sending downlink pilot signals in the private network communication system of kinds, characterized by comprising:

when the th port and the second port are adopted to send downlink pilot signals, the downlink pilot signals are modulated into th downlink signals according to the preset second distribution of pilot resources in the downlink resources, so that the th downlink signals carrying the downlink pilot signals are sent through the th port;

when an th port and a second port are used for sending downlink pilot signals, the downlink pilot signals are modulated into second downlink signals according to the th distribution of preset pilot resources in the downlink resources, so that the second downlink signals carrying the downlink pilot signals are sent through the second port;

the pilot resource is distributed as follows:

the position of the pilot frequency resource is (k, l, n)_PRB)；

k＝1,5；

l＝1,2,11,12；

n_PRB＝0,1,...,479；

The second distribution of pilot resources is as follows:

the position of the pilot frequency resource is (k, l, n)_PRB)；

k＝3,7；

l＝1,2,11,12；

n_PRB＝0,1,...,479。

The base station of , comprising:

a third processing unit, configured to modulate a downlink pilot signal into a downlink signal according to a second distribution of pilot resources preset in downlink resources when a th port and a second port are used to send the downlink pilot signal, so as to send a th downlink signal carrying the downlink pilot signal through the th port;

a fourth processing unit, configured to modulate a downlink pilot signal into a second downlink signal according to a pilot resource distribution preset in a downlink resource when a th port and a second port are used to send the downlink pilot signal, so as to send the second downlink signal carrying the downlink pilot signal through the second port;

the pilot resource is distributed as follows:

the position of the pilot frequency resource is (k, l, n)_PRB)；

k＝1,5；

l＝1,2,11,12；

n_PRB＝0,1,...,479；

The second distribution of pilot resources is as follows:

the position of the pilot frequency resource is (k, l, n)_PRB)；

k＝3,7；

l＝1,2,11,12；

n_PRB＝0,1,...,479。

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