WO2014205741A1

WO2014205741A1 - Interference control method and network device

Info

Publication number: WO2014205741A1
Application number: PCT/CN2013/078188
Authority: WO
Inventors: 张毅
Original assignee: 华为技术有限公司
Priority date: 2013-06-27
Filing date: 2013-06-27
Publication date: 2014-12-31
Also published as: CN103650563B; CN103650563A

Abstract

Disclosed is an interference control method, which relates to the technical field of wireless communications, and can alleviate the problem that the data transmission performance of a terminal device in a wireless network is reduced due to the fact that the power control technology is used to perform interference control. The method of the present invention comprises: determining an equivalent correlation coefficient between a signal of a first terminal device and an interference noise using a channel estimation result, the channel estimation result being a channel estimation result of an uplink channel used by the first terminal device; determining a relationship between the equivalent correlation coefficient and a pre-set threshold, if the equivalent correlation coefficient is greater than or equal to the maximum value of the pre-set threshold, then allocating a designated frequency resource to the first terminal device, wherein the designated frequency resource allocated to the first terminal device is different to a frequency resource used by a second terminal device. Also disclosed is a network device for interference control.

Description

Interference control method and network device

The present invention relates to the field of wireless communication technologies, and in particular, to an interference control method and a network device.

Background technique

In existing wireless communication networks, there are often interferences between different cells to reduce the communication quality of the terminal devices in the wireless communication network. Therefore, power control techniques are commonly used in the art to slow down interference between zones, for example: all terminal devices in a cell can use all frequency resources, but the power of a terminal device in a cell in one frequency band The power in the same frequency band is different from that of the terminal equipment in other cells, for example, the cell 1 is adjacent to the cell 2, the terminal device 1 is in the cell 1, the power of the terminal device 1 in the frequency band 1 is A, and the terminal device 2 is in the cell. 2, the power of the terminal device 2 in the frequency band 1 is B, and A is greater than B, so that the interference of the cell 2 received by the terminal device 1 can be mitigated.

However, in practical applications, in order to reduce interference to neighboring cells, the transmission power of the terminal equipment of the local cell is often reduced. However, the reduction of the transmission power of the terminal device may result in a decrease in data transmission performance of the terminal device in the wireless network.

Summary of the invention

Embodiments of the present invention provide an interference control method and a network device, which can reduce the problem that the data transmission of the terminal device in the wireless network can be reduced due to the interference control by the power control technology.

In order to achieve the above object, embodiments of the present invention use the following technical solutions:

In a first aspect, an embodiment of the present invention provides an interference control method, which is used in a wireless communication system, where the wireless communication system includes at least two adjacent cells, where the first terminal device is located in the first cell, and the second The terminal device is located at an edge of the second cell adjacent to the first cell, and the method includes: Determining, by using a channel estimation result, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where the channel estimation result is a channel estimation result of the uplink channel used by the first terminal device;

Determining a relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to a maximum value of the preset threshold, assigning, to the first terminal device, a specified frequency resource, where The specified frequency resource of the first terminal device is different from the frequency resource used by the second terminal device.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by using the channel estimation result, an equivalent correlation between a signal of the first terminal device and an interference noise includes:

Determining, according to the channel estimation result, an autocorrelation matrix of an uplink channel used by the first terminal device, where =H*iT, ^ represents an autocorrelation matrix of an uplink channel used by the first terminal device, and H represents The channel estimation result, H' represents a transposed conjugate matrix of H;

Acquiring an interference noise covariance matrix of an uplink channel used by the first terminal device; determining, by using an autocorrelation matrix of an uplink channel used by the first terminal device, and the interference noise covariance matrix to determine the first terminal device The equivalent correlation coefficient between the signal and the interference noise, where ^Pe ff = ^{trac R} kk * ) l{trace{R _hh ) * trace{R _uu )) , indicating the signal and interference noise of the first terminal device An equivalent correlation coefficient between the two represents an interference noise covariance matrix of the uplink channel used by the first terminal device, and trace indicates that the matrix is tracked.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the specified frequency resource that is allocated to the first terminal device The frequency resources used by the two terminal devices are in an orthogonal relationship.

In conjunction with the first aspect, or the first possible implementation of the first aspect, or the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the equivalent correlation coefficient is greater than A maximum value equal to the preset threshold is: the equivalent correlation coefficient is greater than or equal to The second threshold; the preset threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold.

With reference to the first aspect, or the first possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, If the effect correlation coefficient is greater than or equal to the first threshold and less than the second threshold, the first terminal device transmit power is decreased according to a preset rule.

In a second aspect, an embodiment of the present invention provides a network device, where the wireless communication system includes at least two adjacent cells, where the first terminal device is located in the first cell, and the second terminal is located in the first cell. The device is located at an edge of the second cell adjacent to the first cell, where the network device includes:

An analysis module, configured to determine, by using the channel estimation result, an equivalent correlation coefficient between a signal of the first terminal device and an interference noise, where the channel estimation result is a channel of an uplink channel used by the first terminal device Estimated result;

a control module, configured to determine a relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to a maximum value of the preset threshold, allocate the specified frequency resource to the first terminal device The specified frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the analyzing module includes:

a first analyzing unit, configured to determine, according to the channel estimation result, an autocorrelation matrix of an uplink channel used by the first terminal device, where: _3⁄4 =H*iT, ^ indicates a used by the first terminal device An autocorrelation matrix of the uplink channel, H represents the channel estimation result, and H' represents a transposed conjugate matrix of H;

a second analyzing unit, configured to acquire an interference noise covariance matrix of an uplink channel used by the first terminal device;

a third analyzing unit, configured to determine a signal and interference of the first terminal device by using an autocorrelation matrix of an uplink channel used by the first terminal device and the interference noise covariance matrix An equivalent correlation coefficient between noises, where ^Pe ff = ^trace d * ) l(trace(R _hh ) * trace(R _uu )) , p _eff represents a signal between the first terminal device and the interference noise An equivalent correlation coefficient, ^R represents an interference noise covariance matrix of an uplink channel used by the first terminal device, and trace represents a trace of the matrix.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the specified frequency resource that is allocated to the first terminal device The frequency resources used by the two terminal devices are in an orthogonal relationship.

With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the The maximum value of the preset threshold is: the equivalent correlation coefficient is greater than or equal to the second threshold, the preset threshold includes a first threshold and a second threshold, and the first threshold is less than the second threshold;

The control module is further configured to allocate the specified frequency resource to the first terminal device if the equivalent correlation coefficient is greater than or equal to the second threshold.

With reference to the second aspect, or the first possible implementation manner of the second aspect, or the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, And if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, reducing the transmit power of the first terminal device according to a preset rule.

In a third aspect, an embodiment of the present invention provides a computing node device, where the computing node includes: a processor, a communication interface, a memory, a bus, the processor, the communication interface, and the memory, through the bus Completing communication with each other, the memory is used to store data that the computing node needs to store during operation; the wireless communication system includes at least two adjacent cells, and the first terminal device is located in the first cell, The second terminal device is located at an edge of the second cell adjacent to the first cell, where the computing node includes:

The processor is configured to determine, by using the channel estimation result, an equivalent correlation coefficient between a signal of the first terminal device and interference noise, where the channel estimation result is an uplink channel used by the first terminal device Channel estimation result; The processor is further configured to determine a relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to a maximum value of the preset threshold, A terminal device allocates a specified frequency resource, wherein the specified frequency resource allocated to the first terminal device is different from a frequency resource used by the second terminal device.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the processor is further configured to:

Obtaining, by the communication interface, an interference noise covariance matrix of an uplink channel used by the first terminal device;

Determining, by the autocorrelation matrix of the uplink channel used by the first terminal device, and the interference noise covariance matrix, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where = d * l(trace(R _hh ) * trace(R _uu )) , representing an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, indicating interference of the uplink channel used by the first terminal device The noise covariance matrix, trace indicates the trace of the matrix.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the specified frequency resource that is allocated to the first terminal device The frequency resources used by the two terminal devices are in an orthogonal relationship.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the The maximum value of the preset threshold is: the equivalent correlation coefficient is greater than or equal to the second threshold, the preset threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold; the processor And if the equivalent correlation coefficient is greater than or equal to the second threshold, the first terminal device is allocated a specified frequency resource.

Combining the third aspect or the first possible implementation of the third aspect or the third aspect In a fourth possible implementation manner of the third aspect, the method further includes: the processor, configured to: if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the The second threshold is used to reduce the transmit power of the first terminal device by using the communication interface according to a preset rule.

In a fourth aspect, an embodiment of the present invention provides a computer program product for a wireless communication system, where the wireless communication system includes at least two adjacent cells, where the first terminal device is located in the first cell, and the second The terminal device is located at an edge of a second cell adjacent to the first cell, and the computer program product comprises a computer readable storage medium storing program code, the program code comprising instructions for:

Determining, by using a channel estimation result, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise; the channel estimation result is a channel estimation result of the uplink channel used by the first terminal device

The interference control method and the network device provided by the embodiments of the present invention are capable of analyzing an equivalent correlation coefficient between a signal and an interference noise of a terminal device, and allocating different terminal devices in different cells when the analysis result satisfies certain conditions. The frequency resource is such that the terminal equipment in one cell does not coincide with the frequency used by the terminal equipment in the neighboring cell, thereby reducing interference between adjacent cells. Compared with the prior art, the embodiment of the present invention can analyze the communication status of the terminal device, and determine a specific mode of the interference control based on the analysis result. The specific manner of the interference control includes allocating different frequencies to the terminal devices in different cells. The resource or the interference control method of adjusting the transmission power of the terminal device and allocating different frequency resources to the terminal devices in different cells can avoid the problem of the data transmission performance being reduced due to the reduction of the transmission power of the terminal device. Compared with the prior art, the power control technology is used to perform the interference control. The embodiment of the present invention can select an appropriate interference control mode based on the communication condition of the terminal device, thereby reducing the interference. In the prior art, the problem of the data transmission performance of the terminal device in the wireless network is reduced due to the single interference control method using only the power control technology.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without any creative work.

FIG. 1 is a flowchart of an interference control method according to an embodiment of the present invention;

2 is a flowchart of another interference control method according to an embodiment of the present invention;

3 is a schematic diagram of a specific example provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of another network device according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a computing node according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to make the advantages of the technical solutions of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

An embodiment of the present invention provides an interference control method, as shown in FIG. 1 , including: It should be noted that the interference control method in this embodiment may be used in a wireless communication system, where the wireless communication system is used. Including at least two adjacent cells, the first terminal device is located in the first cell, and the second terminal device is located at the edge of the second cell adjacent to the first cell. In this embodiment, the edge refers to two The area where the coverage of two or more different cells overlaps. In this embodiment, the network device may perform channel estimation on the uplink channel used by the first terminal device, for example, channel estimation performed on the uplink channel used by the first terminal device may be performed by the base station, and the base station may The channel estimation technology provided in the communication standard converts the pilot signal of the uplink channel used by the first terminal device into the frequency domain, conjugates with the local pilot sequence, performs filtering and noise reduction processing, and finally acquires the channel. Estimated results.

In practical applications, the network device may perform channel estimation on the uplink channel used by the terminal device in the cell by using common technical means, and obtain a channel estimation result.

101. Determine, by using the channel estimation result, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise.

In this embodiment, the network device can be based on:

p _eff = trace(R _hh ^ R _uu ) l trace{R _hh Y trace{R _uu )), obtaining an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where / indicates An equivalent correlation coefficient between the signal of the first terminal device and the interference noise, indicating an interference noise covariance matrix of the uplink channel used by the first terminal device, indicating the self channel of the uplink channel used by the first terminal device The correlation matrix, and 3⁄4 _Α =Η*Η', Η denotes the channel estimation result, H' denotes a transposed conjugate matrix of Η, and trace denotes a trace of the matrix. The specific manner in which the matrix is traced may be in a manner well known to those skilled in the art.

102. Determine a relationship between the equivalent correlation coefficient and a preset threshold.

103. If the equivalent correlation coefficient is greater than or equal to a maximum value of the preset threshold, allocate the specified frequency resource to the first terminal device.

The specified frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device, for example, the cell 1 is adjacent to the cell 2, and the first terminal device is in the cell 1, The frequency resource allocated for the first terminal device is the frequency A, and the second terminal device is at the edge of the cell 2. The frequency resource allocated for the second terminal device is the frequency B, and the frequency A and the frequency B do not coincide.

If the equivalent correlation coefficient is less than the maximum value of the preset threshold, no processing is performed.

The interference control method provided by the embodiment of the invention can perform signal and interference noise on the terminal device The equivalent correlation coefficient between the sounds is analyzed, and different frequency resources are allocated to the terminal devices in different cells when the analysis result satisfies certain conditions, so that the frequency of the terminal devices in one cell and the terminal devices in the adjacent cells are used. Do not coincide, thereby reducing interference between adjacent cells. Compared with the prior art, the embodiment of the present invention can analyze the communication status of the terminal device, and extract an interference control mode for allocating different frequency resources to the terminal devices in different cells based on the analysis result, thereby avoiding lowering the terminal device. The problem of reduced data transmission performance caused by the transmit power. Compared with the prior art, the embodiment of the present invention can alleviate the problem that the data transmission performance of the terminal device in the wireless network is reduced due to the single interference control mode using only the power control technology in the prior art. Optionally, the embodiment of the present invention provides another interference control method, as shown in FIG. 2, including:

201. Perform channel estimation on an uplink channel used by the first terminal device, and obtain a channel estimation result.

In an actual application, the uplink channel used by the first terminal device is often a SRS (Sounding Reference Signal) channel or a DMRS (Demodulation Reference Signal) channel. In this embodiment, the network device can perform channel estimation on the SRS channel or the DMRS channel by using common technical means, and obtain the result of the channel estimation.

202. Determine, according to the channel estimation result, an autocorrelation matrix of an uplink channel used by the first terminal device.

Where _Α = Η * ί , _Α represents the autocorrelation matrix of the uplink channel used by the first terminal device, Η represents the channel estimation result, and H′ represents the transposed conjugate matrix of Η.

203. Acquire an interference noise covariance matrix of an uplink channel used by the first terminal device.

In this embodiment, the network device can acquire the interference noise covariance matrix of the uplink channel used by the first terminal device by using common technical means, for example, the network device can utilize the first The received signal on the pilot point of the uplink channel used by the terminal device and the filtered noise-reduced channel data are used to obtain interference noise, and then the interference noise is used to obtain the interference noise covariance matrix through an algorithm provided in the existing communication standard.

204. Determine, by using an autocorrelation matrix of an uplink channel used by the first terminal device, and the interference noise covariance matrix, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise.

Where P _eff = trace(R _hh * R _uu ) l(trace(R _hh ) * trace(R _uu )) , A represents an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, The interference noise covariance matrix of the uplink channel used by the first terminal device, and the trace indicates the trace of the matrix.

205. Determine a relationship between the correlation coefficient and a preset threshold.

The preset threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold.

In this embodiment, the preset threshold may be input by the technician to the network device, or may be one or more thresholds automatically acquired by the network device, for example, the preset threshold may include the first threshold and the second threshold. It is also possible to include more threshold values as shown in Table 1.

Where Thres-low can represent the first threshold, Thres-mid can represent the second threshold, and Thres-high can represent a third threshold greater than the second threshold.

206. If the equivalent correlation coefficient is greater than or equal to the second threshold, allocate the specified frequency resource to the first terminal device.

The designated frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device. In this embodiment, the specified frequency resource may include an orthogonal frequency resource. In this embodiment, the network device may allocate two frequency resources that are orthogonal to each other, and assign one of them to the first terminal device, and the other to the second terminal device, so that the first terminal device and the first terminal device The frequency resources used by the two terminal devices are in an orthogonal relationship.

207. If the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, reduce the transmit power of the first terminal device according to a preset rule.

In this embodiment, the preset rule by which the network device reduces the transmit power of the first terminal device may be a specific standard recorded in the existing communication protocol, or may be input by a technician or automatically obtained by the network device. Rules, for example: The transmit power of the first terminal device can be reduced to 1/3 of the maximum transmit power.

If the equivalent correlation coefficient is less than the first threshold, the first terminal device is not processed.

The interference control method provided by the embodiment of the present invention can analyze the equivalent correlation coefficient between the signal of the terminal device and the interference noise, and allocate different frequency resources to the terminal devices in different cells when the analysis result satisfies certain conditions. The terminal devices in one cell do not coincide with the frequencies used by the terminal devices in the neighboring cells, thereby reducing interference between adjacent cells. Compared with the prior art, the embodiment of the present invention can analyze the communication status of the terminal device, and determine a specific mode of the interference control based on the analysis result. The specific manner of the interference control includes allocating different frequencies to the terminal devices in different cells. The resource or the interference control method of adjusting the transmission power of the terminal device and allocating different frequency resources to the terminal devices in different cells can avoid the problem of the data transmission performance being reduced due to the reduction of the transmission power of the terminal device. Compared with the prior art, the power control technology is used to perform the interference control. The embodiment of the present invention can select an appropriate interference control mode based on the communication condition of the terminal device, thereby mitigating the single technology in the prior art because only the power control technology is used. The problem that the data transmission performance of the terminal device in the wireless network is reduced due to the interference control mode. According to the interference control method described in this embodiment, those skilled in the art can obtain the following Use scenario:

In the LTE network shown in FIG. 3, the cell 1 and the cell 2 are adjacent cells and belong to the same base station, the terminal device 1 is located in the cell 1, and the terminal device 2 is located in the cell 2, and the base station starts to perform the cell 1 Interference control.

1. Perform channel estimation on the DMRS channel used by the terminal device 1 in the cell 1, and obtain a channel estimation result.

2. Determine an autocorrelation matrix of the DMRS channel where the terminal device 1 is located according to the channel estimation result of the DMRS channel, and obtain an interference noise covariance matrix of the terminal device 1 in the D M R S channel.

3. Using the obtained autocorrelation matrix and the interference noise covariance matrix to determine the equivalent correlation coefficient between the signal of the terminal device 1 and the interference noise, and determine the relationship between the correlation coefficient and the preset threshold, and the preset threshold includes the first A threshold and a second threshold.

4. If the equivalent correlation coefficient is greater than or equal to the second threshold, obtain frequency resource 1 and frequency resource 2, and frequency resource 1 and frequency resource 2 are in an orthogonal relationship.

5. Assign frequency resource 1 to terminal device 1 and assign frequency resource 2 to terminal device 2. 4, and 4-5, if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, the terminal device 1 device transmission power is reduced according to a preset rule.

The embodiment of the present invention further provides a network device for interference control, where the network device is used in a wireless communication system, where the wireless communication system includes at least two adjacent cells, and the first terminal device is located at the first In the cell, the second terminal device is located at an edge of the second cell adjacent to the first cell. As shown in FIG. 4, the network device includes:

The analyzing module 41 is configured to determine, by using the channel estimation result, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise.

The control module 42 is configured to determine a relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to a maximum value of the preset threshold, assign the specified frequency to the first terminal device. Resources.

The designated frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device. The network device provided by the embodiment of the present invention can analyze the equivalent correlation coefficient between the signal and the interference noise of the terminal device, and allocate different frequency resources to the terminal devices in different cells when the analysis result satisfies certain conditions, so that The terminal equipment in one cell does not coincide with the frequency used by the terminal equipment in the neighboring cell, thereby reducing interference between adjacent cells. Compared with the prior art, the embodiment of the present invention can analyze the communication status of the terminal device, and determine a specific mode of the interference control based on the analysis result. The specific manner of the interference control includes allocating different frequencies to the terminal devices in different cells. The resource or the interference control method of adjusting the transmission power of the terminal device and allocating different frequency resources to the terminal devices in different cells can avoid the problem of the data transmission performance being reduced due to the reduction of the transmission power of the terminal device. Compared with the prior art, the power control technology is used to perform the interference control. The embodiment of the present invention can select an appropriate interference control mode based on the communication condition of the terminal device, thereby mitigating the single technology in the prior art because only the power control technology is used. The problem that the data transmission performance of the terminal device in the wireless network is reduced due to the interference control mode. On the basis of the network device shown in FIG. 4, the embodiment of the present invention further provides another network device for interference control, as shown in FIG. 5, including:

The estimating module 51 is configured to perform channel estimation on the uplink channel used by the first terminal device, and obtain a channel estimation result.

The analyzing module 52 is configured to determine, by using the channel estimation result, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise.

Optionally, the analyzing module 52 includes:

a first analyzing unit 521, configured to determine, according to the channel estimation result, an autocorrelation matrix of an uplink channel used by the first terminal device, where _Α =Η*Η', where _Α indicates that the first terminal device uses The autocorrelation matrix of the uplink channel, Η denotes the channel estimation result, and represents the transposed conjugate matrix of Η.

The second analyzing unit 522 is configured to acquire an interference noise covariance matrix of an uplink channel used by the first terminal device. a third analyzing unit 523, configured to determine, by using an autocorrelation matrix of an uplink channel used by the first terminal device, and the interference noise covariance matrix, an equivalent correlation between a signal of the first terminal device and interference noise a coefficient, where, = * ) l(trace{R _hh ) * trace{R _uu )) , / represents an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, and ^R "" indicates the The interference noise covariance matrix of the uplink channel used by a terminal device, trace indicates the trace of the matrix.

The control module 53 is configured to determine a relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to a maximum value of the preset threshold, assign the specified frequency to the first terminal device. Resources.

The designated frequency resource allocated to the first terminal device is in an orthogonal relationship with the frequency resource used by the second terminal device.

Optionally, the preset threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold, where the control module 53 is further configured to: if the equivalent correlation coefficient is greater than or equal to the second threshold And allocating the specified frequency resource to the first terminal device.

Further, the control module 53 is further configured to: if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, reduce the transmit power of the first terminal device according to a preset rule. .

The network device provided by the embodiment of the present invention can analyze the equivalent correlation coefficient between the signal and the interference noise of the terminal device, and allocate different frequency resources to the terminal devices in different cells when the analysis result satisfies certain conditions, so that The terminal equipment in one cell does not coincide with the frequency used by the terminal equipment in the neighboring cell, thereby reducing interference between adjacent cells. Compared with the prior art, the embodiment of the present invention can analyze the communication status of the terminal device, and determine a specific mode of the interference control based on the analysis result. The specific manner of the interference control includes allocating different frequencies to the terminal devices in different cells. The resource or the interference control method of adjusting the transmission power of the terminal device and allocating different frequency resources to the terminal devices in different cells can avoid the problem of the data transmission performance being reduced due to the reduction of the transmission power of the terminal device. Compared with the prior art, the power control technology is simply used to perform interference control, and the embodiment of the present invention may be based on The terminal device communication condition selects an appropriate interference control mode, thereby alleviating the problem that the data transmission performance of the terminal device in the wireless network is reduced due to the single interference control mode using only the power control technology in the prior art. The embodiment of the present invention further provides a computing node for interference control, the computing node is used in a wireless communication system, the wireless communication system includes at least two adjacent cells, and the first terminal device is located at the first In the cell, the second terminal device is located at an edge of the second cell adjacent to the first cell. As shown in FIG. 6, the computing node includes: a processor 61, a communication interface 62, a memory 63, and a bus 64. The processor 61, the communication interface 62, and the memory 63 complete communication with each other through the bus 64. The memory 63 is configured to store data that needs to be stored by the computing node during operation, where:

The processor 61 is configured to determine, by using the channel estimation result, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where the channel estimation result is an uplink used by the first terminal device Channel estimation result of the channel.

Optionally, the processor 61 is further configured to determine, according to the channel estimation result, an autocorrelation matrix of an uplink channel used by the first terminal device, where _Α =Η*ί , _Α denotes the first The autocorrelation matrix of the uplink channel used by the terminal device, Η represents the channel estimation result, and H' represents the transposed conjugate matrix of Η. And obtaining, by the communication interface 62, an interference noise covariance matrix of the uplink channel used by the first terminal device. And determining, by the autocorrelation matrix of the uplink channel used by the first terminal device, and the interference noise covariance matrix, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where Peff = trace (R _hh * R _uu ) l(trace(R _hh ) * trace(R _uu )) , representing an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, indicating that the first terminal device The interference noise covariance matrix of the upstream channel used, trace indicates the trace of the matrix. The processor 61 is further configured to determine a relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to a maximum value of the preset threshold, pass the communication interface. 62 assigning the specified frequency resource to the first terminal device.

The designated frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device. Specifically, the specified frequency resource allocated to the first terminal device and the frequency resource used by the second terminal device may be in an orthogonal relationship.

Further, the preset threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold, and the processor 61 is further configured to: if the equivalent correlation coefficient is greater than or equal to the second The threshold is used to allocate the specified frequency resource to the first terminal device through the communication interface 62.

Further, the processor 61 is further configured to: if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, reduce the location through the communication interface 62 according to a preset rule. The first terminal device transmits power.

The computing node provided by the embodiment of the present invention can analyze the equivalent correlation coefficient between the signal of the terminal device and the interference noise, and allocate different frequency resources to the terminal devices in different cells when the analysis result satisfies certain conditions, so that The terminal equipment in one cell does not coincide with the frequency used by the terminal equipment in the neighboring cell, thereby reducing interference between adjacent cells. Compared with the prior art, the embodiment of the present invention can analyze the communication status of the terminal device, and determine a specific mode of the interference control based on the analysis result. The specific manner of the interference control includes allocating different frequencies to the terminal devices in different cells. The resource or the interference control method of adjusting the transmission power of the terminal device and allocating different frequency resources to the terminal devices in different cells can avoid the problem of the data transmission performance being reduced due to the reduction of the transmission power of the terminal device. Compared with the prior art, the power control technology is used to perform the interference control. The embodiment of the present invention can select an appropriate interference control mode based on the communication condition of the terminal device, thereby mitigating the single technology in the prior art because only the power control technology is used. The problem that the data transmission performance of the terminal device in the wireless network is reduced due to the interference control mode. The embodiment of the invention further provides a computer program product for interference control, the computer program product being used in a wireless communication system, the wireless communication system comprising at least two phases The neighboring cell, the first terminal device is located in the first cell, and the second terminal device is located at an edge of the second cell adjacent to the first cell. Such a computer program product comprises a computer readable storage medium storing program code, the program code comprising instructions for:

And determining, by using a channel estimation result, an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where the channel estimation result is a channel estimation result of the uplink channel used by the first terminal device;

The computer program product provided by the embodiment of the invention can analyze the equivalent correlation coefficient between the signal and the interference noise of the terminal device, and allocate different frequency resources to the terminal devices in different cells when the analysis result satisfies certain conditions. The terminal devices in one cell do not coincide with the frequencies used by the terminal devices in the neighboring cells, thereby reducing interference between adjacent cells. Compared with the prior art, the embodiment of the present invention can analyze the communication status of the terminal device, and determine a specific mode of the interference control based on the analysis result. The specific manner of the interference control includes allocating different frequencies to the terminal devices in different cells. The resource or the interference control method of adjusting the transmission power of the terminal device and allocating different frequency resources to the terminal devices in different cells can avoid the problem of the data transmission performance being reduced due to the reduction of the transmission power of the terminal device. Compared with the prior art, the power control technology is used to perform the interference control. The embodiment of the present invention can select an appropriate interference control mode based on the communication condition of the terminal device, thereby mitigating the single technology in the prior art because only the power control technology is used. The problem that the data transmission performance of the terminal device in the wireless network is reduced due to the interference control mode. The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on differences from other embodiments. In particular, for an embodiment of the device, since it is substantially similar to the method embodiment, Therefore, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiments.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any change or replacement that can be easily conceived by those skilled in the art within the technical scope of the present invention is All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

claims

1. An interference control method for a wireless communication system, characterized in that the wireless communication system includes at least two adjacent cells, the first terminal device is located in the first cell, and the second terminal device is located between The edge of the second cell adjacent to the first cell, the method includes: using a channel estimation result to determine an equivalent correlation coefficient between the signal of the first terminal equipment and the interference noise, the channel estimation result is The channel estimation result of the uplink channel used by the first terminal device;

Determine the relationship between the equivalent correlation coefficient and the preset threshold. If the equivalent correlation coefficient is greater than or equal to the maximum value of the preset threshold, allocate designated frequency resources to the first terminal device, wherein, allocated to The specified frequency resource of the first terminal device is different from the frequency resource used by the second terminal device.

2. The interference control method according to claim 1, characterized in that, using the channel estimation result to determine the equivalent correlation coefficient between the signal of the first terminal equipment and interference noise includes:

The autocorrelation matrix of the uplink channel used by the first terminal device is determined according to the channel estimation result, where _A =H*H' represents the autocorrelation matrix of the uplink channel used by the first terminal device, H represents the channel estimation result, H' represents the transposed conjugate matrix of H; obtains the interference noise covariance matrix of the uplink channel used by the first terminal equipment; utilizes the interference noise covariance matrix of the uplink channel used by the first terminal equipment The autocorrelation matrix and the interference noise covariance matrix determine the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where, P _eff = trace(R _hh * R _uu ) l(trace(R _hh ) * trace(R _uu )), V represents the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, represents the interference noise covariance matrix of the uplink channel used by the first terminal device, trace Represents the trace of the matrix.

3. The interference control method according to claim 1 or 2, characterized in that the designated frequency resources allocated to the first terminal equipment are in an orthogonal relationship with the frequency resources used by the second terminal equipment.

4. The interference control method according to any one of claims 1 to 3, characterized in that: The maximum value of the effective correlation coefficient greater than or equal to the preset threshold is: the equivalent correlation coefficient is greater than or equal to the second threshold; the preset threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold.

5. The interference control method according to claim 1 or 2 or 4, further comprising: if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, then according to a preset rule Reduce the transmit power of the first terminal device.

6. A network device for a wireless communication system, characterized in that the wireless communication system includes at least two adjacent cells, the first terminal device is located in the first cell, and the second terminal device is located with the first cell. At the edge of a second cell adjacent to the first cell, the network device includes: an analysis module configured to use the channel estimation result to determine the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, The channel estimation result is a channel estimation result of the uplink channel used by the first terminal device;

A control module, configured to determine the relationship between the equivalent correlation coefficient and the preset threshold, and allocate designated frequency resources to the first terminal device if the equivalent correlation coefficient is greater than or equal to the maximum value of the preset threshold. , wherein the specified frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device.

7. The network device according to claim 6, characterized in that, the analysis module includes: a first analysis unit, configured to determine the autocorrelation matrix of the uplink channel used by the first terminal device according to the channel estimation result. , where, ? _¾ =H*iT, represents the autocorrelation matrix of the uplink channel used by the first terminal equipment, H represents the channel estimation result, and H' represents the transposed conjugate matrix of H;

The second analysis unit is used to obtain the interference noise covariance matrix of the uplink channel used by the first terminal device;

A third analysis unit configured to determine the equivalent correlation coefficient between the signal of the first terminal device and the interference noise using the autocorrelation matrix of the uplink channel used by the first terminal device and the interference noise covariance matrix. , where, ^Pe ff = ^trace , ^R * u ) l{trace{R _hh ) * trace{R _uu )) , p _eff represents the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, expressed described The interference noise covariance matrix of the uplink channel used by the first terminal equipment, trace means tracing the matrix.

8. The network device according to claim 6 or 7, wherein the designated frequency resource allocated to the first terminal device is in an orthogonal relationship with the frequency resource used by the second terminal device.

9. The network device according to any one of claims 6 to 8, characterized in that, the maximum value of the equivalent correlation coefficient greater than or equal to the preset threshold is: the equivalent correlation coefficient is greater than or equal to the second threshold, The preset threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold;

The control module is also configured to allocate designated frequency resources to the first terminal device when the equivalent correlation coefficient is greater than or equal to the second threshold.

10. The network device according to claim 6 or 7 or 9, further comprising: the control module, further configured to: if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, the transmit power of the first terminal device is reduced according to preset rules.

11. A computing node device, characterized in that the computing node includes: a processor, a communication interface, a memory, and a bus. The processor, the communication interface, and the memory complete mutual communication through the bus. Communication, the memory is used to store data that needs to be stored by the computing node during operation; the wireless communication system includes at least two adjacent cells, the first terminal device is located in the first cell, and the second terminal device is located in The edge of the second cell adjacent to the first cell, the computing node includes:

The processor is configured to use the channel estimation result to determine an equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where the channel estimation result is the uplink channel used by the first terminal device. The channel estimation results;

The processor is also configured to determine the relationship between the equivalent correlation coefficient and a preset threshold. If the equivalent correlation coefficient is greater than or equal to the maximum value of the preset threshold, then provide the third value through the communication interface. A terminal device allocates designated frequency resources, wherein the designated frequency resources assigned to the first terminal device are different from frequency resources used by the second terminal device.

12. The computing node device according to claim 11, characterized in that, the processor is also used to:

Determine the autocorrelation matrix of the uplink channel used by the first terminal device according to the channel estimation result, where _A = H*H', _A represents the autocorrelation matrix of the uplink channel used by the first terminal device, H represents the channel estimation result, H' represents the transposed conjugate matrix of H; and obtains the interference noise covariance matrix of the uplink channel used by the first terminal device through the communication interface;

Then use the autocorrelation matrix of the uplink channel used by the first terminal device and the interference noise covariance matrix to determine the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where, , = ^trace ^ * ^R uu ) l(trace{R _hh ) * trace{R _uu )) , V represents the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, represents the signal used by the first terminal device The interference noise covariance matrix of the uplink channel, tr ac e represents the trace of the matrix.

13. The computing node device according to claim 11 or 12, wherein the specified frequency resource allocated to the first terminal device is in an orthogonal relationship with the frequency resource used by the second terminal device.

14. The computing node device according to any one of claims 11 to 13, characterized in that, the maximum value of the equivalent correlation coefficient greater than or equal to the preset threshold is: the equivalent correlation coefficient is greater than or equal to the second threshold , the preset threshold includes a first threshold and a second threshold, and the first threshold is less than the second threshold; the processor is also configured to: if the equivalent correlation coefficient is greater than or equal to the second threshold, then The first terminal device allocates designated frequency resources.

15. The computing node device according to claim 11 or 12 or 14, further comprising:

The processor is also configured to, if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, reduce the transmission power of the first terminal device through the communication interface according to a preset rule.

16. A computer program product for interference control, used in a wireless communication system, characterized in that the wireless communication system includes at least two adjacent cells, and the first terminal device is located In the first cell, the second terminal device is located at the edge of the second cell adjacent to the first cell, and the computer program product includes a computer-readable storage medium storing program code, and the program code includes instructions for:

The channel estimation result is used to determine the equivalent correlation coefficient between the signal of the first terminal device and the interference noise; the channel estimation result is the channel estimation result of the uplink channel used by the first terminal device;