Interference control method and network equipment thereof

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0049] 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.

[0050] The embodiment of the present invention provides an interference control method, such as figure 1 Shown, including:

[0051] It should be noted that the interference control method described in this embodiment can be used in a wireless communication system that includes at least two adjacent cells, the first terminal device is located in the first cell, and the first terminal device is located in the first cell. The second terminal device is located at the edge of a second cell adjacent to the first cell. In this embodiment, the edge refers to an area where the coverage areas of two or more different cells overlap.

[0052] In this embodiment, the network device can perform channel estimation on the uplink channel used by the first terminal device. For example, the channel estimation on the uplink channel used by the first terminal device can be performed by the base station, and the base station can perform channel estimation based on the existing The channel estimation technology provided in the communication standard of the first terminal device transforms the pilot signal of the uplink channel used by the first terminal device into the frequency domain, and multiplies it with the local pilot sequence, and then performs filtering and noise reduction processing, and finally obtains the channel Estimate the result.

[0053] In actual applications, the network equipment can perform channel estimation on the uplink channel used by the terminal equipment in the cell through common technical means, and obtain the channel estimation result.

[0054] 101. Determine an equivalent correlation coefficient between the signal of the first terminal device and the interference noise by using the channel estimation result.

[0055] In this embodiment, the network device can be based on:

[0056] ρ eff =trace(R hh *R uu )/(trace(R hh )*trace(R uu )) to obtain the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, where ρ eff Represents the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, R uu Represents the interference and noise covariance matrix of the uplink channel used by the first terminal device, R hh Represents the autocorrelation matrix of the uplink channel used by the first terminal device, and R hh =H*H', H represents the channel estimation result, H'represents the transposed conjugate matrix of H, and trace represents the trace of the matrix. The specific method for obtaining the trace of the matrix may be a method well known to those skilled in the art.

[0057] 102. Determine the relationship between the equivalent correlation coefficient and a preset threshold.

[0058] 103. If the equivalent correlation coefficient is greater than or equal to the maximum value of the preset threshold, allocate a designated frequency resource to the first terminal device.

[0059] Wherein, the designated frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device, for example: cell 1 is adjacent to cell 2, and the first terminal device is in cell 1, then The frequency resource allocated to the first terminal device is frequency A, and the second terminal device is at the edge of cell 2, the frequency resource allocated to the second terminal device is frequency B, and frequency A and frequency B do not overlap.

[0060] If the equivalent correlation coefficient is less than the maximum value of the preset threshold, no processing is performed.

[0061] 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 device in different cells when the analysis result meets certain conditions. The frequency used by the terminal equipment in one cell and the terminal equipment in the adjacent cell are not overlapped, 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 equipment, and adopt the interference control method of allocating different frequency resources for the terminal equipment in different cells based on the analysis result, thereby avoiding the reduction of the terminal equipment The problem of reduced data transmission performance caused by transmit power. Compared with the prior art, the embodiments of the present invention can alleviate the problem of reduced data transmission performance of the terminal equipment in the wireless network caused by only using the power control technology as a single interference control method in the prior art.

[0062] Optionally, the embodiment of the present invention provides another interference control method, such as figure 2 Shown, including:

[0063] 201. Perform channel estimation on an uplink channel used by the first terminal device, and obtain a channel estimation result.

[0064] In practical applications, the uplink channel used by the first terminal device is often an SRS (Sounding reference signal, sounding reference signal) channel or a DMRS (Demodulation reference signal, demodulation reference signal) channel. In this embodiment, the network device can perform channel estimation on the SRS channel or the DMRS channel through common technical means, and obtain the channel estimation result.

[0065] 202. Determine an autocorrelation matrix of an uplink channel used by the first terminal device according to the channel estimation result.

[0066] Where R hh =H*H', R hh Represents the autocorrelation matrix of the uplink channel used by the first terminal device, H represents the channel estimation result, and H'represents the transposed conjugate matrix of H.

[0067] 203. Acquire the interference and noise covariance matrix of the uplink channel used by the first terminal device.

[0068] In this embodiment, the network device can obtain the interference noise covariance matrix of the uplink channel used by the first terminal device through common technical means. For example, the network device can use the pilot point of the uplink channel used by the first terminal device. The received signal and the channel data after filtering and noise reduction are used to obtain the interference noise, and then the interference noise is used to obtain the interference noise covariance matrix through the algorithm provided in the existing communication standard.

[0069] 204. Determine an equivalent correlation coefficient between the signal of the first terminal device and the interference noise by using the autocorrelation matrix of the uplink channel used by the first terminal device and the interference noise covariance matrix.

[0070] Where ρ eff =trace(R hh *R uu )/(trace(R hh )*trace(R uu )), ρ eff Represents the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, R uu Represents the interference and noise covariance matrix of the uplink channel used by the first terminal device, and trace represents tracing the matrix.

[0071] 205. Determine the relationship between the isocorrelation coefficient and a preset threshold.

[0072] Wherein, the preset threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold.

[0073] In this embodiment, the preset threshold may be input by a technician to the network device, or one or more threshold values ​​automatically acquired by the network device. For example, the preset threshold may include a first threshold and a second threshold. You can also include more thresholds as shown in Table 1.

[0074] Threshold

[0075] Table I

[0076] Among them, Thres_low may indicate the first threshold, Thres_mid may indicate the second threshold, and Thres_high may indicate a third threshold greater than the second threshold.

[0077] 206. If the equivalent correlation coefficient is greater than or equal to the second threshold, allocate a designated frequency resource to the first terminal device.

[0078] Wherein, 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 designated frequency resources may include orthogonal frequency resources.

[0079] In this embodiment, the network device can have two frequency resources that are orthogonal to each other, and allocate one of them to the first terminal device and the other to the second terminal device, so that the first terminal device and the second terminal device The frequency resources used by the terminal equipment are orthogonal.

[0080] 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.

[0081] In this embodiment, the preset rule by which the network device reduces the transmit power of the first terminal device can be a specific standard recorded in the existing communication protocol, or it can be input by a technician, or automatically obtained by the network device. Rule, for example: the transmit power of the first terminal device can be reduced to 1/3 of the maximum transmit power.

[0082] If the equivalent correlation coefficient is less than the first threshold, no processing is performed on the first terminal device.

[0083] 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 device in different cells when the analysis result meets certain conditions. The frequency used by the terminal equipment in one cell and the terminal equipment in the adjacent cell are not overlapped, 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 equipment, and determine the specific method of interference control based on the analysis result. The specific method of interference control includes allocating different frequencies for the terminal equipment in different cells. The interference control method of adjusting the transmission power of the terminal equipment and allocating different frequency resources to the terminal equipment in different cells can avoid the problem of reduced data transmission performance caused by reducing the transmission power of the terminal equipment. Compared with the prior art that simply uses power control technology to perform interference control, the embodiment of the present invention can select a suitable interference control method based on the communication status of the terminal device, thereby mitigating the single use of power control technology in the prior art. The problem of reduced data transmission performance of terminal equipment in wireless networks caused by interference control methods.

[0084] According to the interference control method described in this embodiment, those skilled in the art can obtain the following application scenarios:

[0085] In such image 3 In the LTE network shown, cell 1 and cell 2 are adjacent cells and belong to the same base station, terminal device 1 is located in cell 1, and terminal device 2 is located in cell 2, and the base station starts to perform interference control on cell 1.

[0086] 1. Perform channel estimation on the DMRS channel used by terminal device 1 in cell 1, and obtain the channel estimation result.

[0087] 2. Determine the 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 the interference noise covariance matrix of the terminal device 1 on the DMRS channel.

[0088] 3. Use the acquired autocorrelation matrix and 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 equal correlation coefficient and the preset threshold. The preset threshold includes the first The first threshold and the second threshold.

[0089] 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.

[0090] 5. Allocate frequency resource 1 to terminal device 1, and allocate frequency resource 2 to terminal device 2.

[0091] 4'. Parallel to 4-5, if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold, the transmission power of the terminal device 1 is reduced according to the preset rule.

[0092] The embodiment of the present invention also provides a network device for interference control. This network device is used in a wireless communication system. The wireless communication system includes at least two adjacent cells. The first terminal device is located in the first In the cell, the second terminal device is located at the edge of the second cell adjacent to the first cell, such as Figure 4 As shown, the network equipment includes:

[0093] The analysis module 41 is 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.

[0094] The control module 42 is configured to determine the relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to the maximum value of the preset threshold, assign a designated frequency to the first terminal device Resources.

[0095] Wherein, the designated frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device.

[0096] The network device 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 device in different cells when the analysis result meets certain conditions, so that The frequency used by the terminal equipment in one cell and the terminal equipment in the adjacent cell do not overlap, 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 equipment, and determine the specific method of interference control based on the analysis result. The specific method of interference control includes allocating different frequencies for the terminal equipment in different cells. The interference control method of adjusting the transmission power of the terminal equipment and allocating different frequency resources to the terminal equipment in different cells can avoid the problem of reduced data transmission performance caused by reducing the transmission power of the terminal equipment. Compared with the prior art that simply uses power control technology to perform interference control, the embodiment of the present invention can select a suitable interference control method based on the communication status of the terminal device, thereby mitigating the single use of power control technology in the prior art. The problem of reduced data transmission performance of terminal equipment in wireless networks caused by interference control methods.

[0097] In such Figure 4 On the basis of the network equipment shown, the embodiment of the present invention also provides another network equipment for interference control, such as Figure 5 Shown include:

[0098] The estimation module 51 is configured to perform channel estimation on the uplink channel used by the first terminal device and obtain the channel estimation result.

[0099] The analysis module 52 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.

[0100] Optionally, the analysis module 52 includes:

[0101] The first analysis unit 521 is configured to determine the autocorrelation matrix of the uplink channel used by the first terminal device according to the channel estimation result, where R hh =H*H', R hh Represents the autocorrelation matrix of the uplink channel used by the first terminal device, H represents the channel estimation result, and H'represents the transposed conjugate matrix of H.

[0102] The second analysis unit 522 is configured to obtain the interference and noise covariance matrix of the uplink channel used by the first terminal device.

[0103] The third analysis unit 523 is configured to 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 between the signal of the first terminal device and the interference noise Coefficient, where ρ eff =trace(R hh *R uu )/(trace(R hh )*trace(R uu )), ρ eff Represents the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, R uu Represents the interference and noise covariance matrix of the uplink channel used by the first terminal device, and trace represents tracing the matrix.

[0104] The control module 53 is configured to determine the relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to the maximum value of the preset threshold, assign a designated frequency to the first terminal device Resources.

[0105] Wherein, the designated frequency resource allocated to the first terminal device and the frequency resource used by the second terminal device are in an orthogonal relationship.

[0106] Optionally, the preset threshold includes a first threshold and a second threshold, and the first threshold is less than the second threshold, and the control module 53 is further configured to: if the equivalent correlation coefficient is greater than or equal to the second threshold , The designated frequency resource is allocated to the first terminal device.

[0107] Further optionally, the control module 53 is further configured to reduce the transmit power of the first terminal device according to a preset rule if the equivalent correlation coefficient is greater than or equal to the first threshold and less than the second threshold .

[0108] The network device 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 device in different cells when the analysis result meets certain conditions, so that The frequency used by the terminal equipment in one cell and the terminal equipment in the adjacent cell do not overlap, 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 equipment, and determine the specific method of interference control based on the analysis result. The specific method of interference control includes allocating different frequencies for the terminal equipment in different cells. The interference control method of adjusting the transmission power of the terminal equipment and allocating different frequency resources to the terminal equipment in different cells can avoid the problem of reduced data transmission performance caused by reducing the transmission power of the terminal equipment. Compared with the prior art that simply uses power control technology to perform interference control, the embodiment of the present invention can select a suitable interference control method based on the communication status of the terminal device, thereby mitigating the single use of power control technology in the prior art. The problem of reduced data transmission performance of terminal equipment in wireless networks caused by interference control methods.

[0109] The embodiment of the present invention further provides a computing node for interference control. This computing node is used in a wireless communication system. The wireless communication system includes at least two adjacent cells. The first terminal device is located in the first In the cell, the second terminal device is located at the edge of the second cell adjacent to the first cell, such as Image 6 As shown, 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 communicate with each other through the bus 64 , The memory 63 is used to store the data that needs to be stored during the operation of the computing node, where:

[0110] The processor 61 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, and the channel estimation result is the uplink used by the first terminal device. Channel estimation result of the channel.

[0111] Optionally, the processor 61 is further configured to determine an autocorrelation matrix of the uplink channel used by the first terminal device according to the channel estimation result, where R hh =H*H', R hh Represents the autocorrelation matrix of the uplink channel used by the first terminal device, H represents the channel estimation result, and H'represents the transposed conjugate matrix of H. And through the communication interface 62, the interference and noise covariance matrix of the uplink channel used by the first terminal device is obtained. 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 ρ eff =trace(R hh *R uu )/(trace(R hh )*trace(R uu )), ρ eff Represents the equivalent correlation coefficient between the signal of the first terminal device and the interference noise, R uu Represents the interference and noise covariance matrix of the uplink channel used by the first terminal device, and trace represents tracing the matrix.

[0112] The processor 61 is further configured to determine the relationship between the equivalent correlation coefficient and a preset threshold, and if the equivalent correlation coefficient is greater than or equal to the maximum value of the preset threshold, the communication interface 62 is used for the The first terminal device allocates designated frequency resources.

[0113] Wherein, the designated frequency resource allocated to the first terminal device is different from the frequency resource used by the second terminal device. Specifically, the designated frequency resource allocated to the first terminal device and the frequency resource used by the second terminal device may be in an orthogonal relationship.

[0114] Further optionally, the preset threshold includes a first threshold and a second threshold, and the first threshold is less 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 threshold, Threshold, the designated frequency resource is allocated to the first terminal device through the communication interface 62.

[0115] Still further optionally, 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 total value through the communication interface 62 according to a preset rule. The transmission power of the first terminal device.

[0116] 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 device in different cells when the analysis result meets certain conditions, so that The frequencies used by the terminal equipment in one cell and the terminal equipment in the adjacent cell do not overlap, 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 equipment, and determine the specific method of interference control based on the analysis result. The specific method of interference control includes allocating different frequencies to the terminal equipment in different cells. Resources or interference control methods of adjusting the transmission power of the terminal equipment and allocating different frequency resources to the terminal equipment in different cells can avoid the problem of reduced data transmission performance caused by reducing the transmission power of the terminal equipment. Compared with the prior art that simply uses power control technology for interference control, the embodiment of the present invention can select an appropriate interference control method based on the communication status of the terminal device, thereby mitigating the single use of power control technology in the prior art. The problem of reduced data transmission performance of terminal equipment in wireless networks caused by interference control methods.

[0117] The embodiment of the present invention further provides a computer program product for interference control. This computer program product is used in a wireless communication system. The wireless communication system includes at least two adjacent cells. The first terminal device is located in In the first cell, the second terminal device is located at the edge of a second cell adjacent to the first cell. Such a computer program product includes a computer-readable storage medium storing program code, and the program code includes instructions for:

[0118] Using a 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 channel estimation result of the uplink channel used by the first terminal device;

[0119] The relationship between the equivalent correlation coefficient and a preset threshold is determined, and if the equivalent correlation coefficient is greater than or equal to the maximum value of the preset threshold, a designated frequency resource is allocated to the first terminal device, where The designated frequency resource of the first terminal device is different from the frequency resource used by the second terminal device.

[0120] The computer program product 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 device in different cells when the analysis result meets certain conditions, The frequency used by the terminal equipment in one cell and the terminal equipment in the adjacent cell does not overlap, 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 equipment, and determine the specific method of interference control based on the analysis result. The specific method of interference control includes allocating different frequencies to the terminal equipment in different cells. The resource or interference control method of adjusting the transmission power of the terminal equipment and allocating different frequency resources to the terminal equipment in different cells can avoid the problem of reduced data transmission performance caused by reducing the transmission power of the terminal equipment. Compared with the prior art that simply uses power control technology for interference control, the embodiment of the present invention can select an appropriate interference control method based on the communication status of the terminal device, thereby mitigating the single use of power control technology in the prior art. The problem of reduced data transmission performance of terminal equipment in wireless networks caused by interference control methods.

[0121] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the part of the description of the method embodiment.

[0122] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing relevant hardware through a computer program. The program can be stored in a computer readable storage medium. During execution, it may include the procedures of the above-mentioned method embodiments. Wherein, the storage medium may be a magnetic disk, an optical disc, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM), etc.

[0123] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.