CN108667472B - A kind of interference detection method and device - Google Patents

Abstract

The embodiment of the invention discloses an interference detection method and device, which comprises the steps of obtaining a receiving signal of each subcarrier in a resource module RB corresponding to the ith symbol, and calculating the first receiving power of an RB on the ith symbol according to the receiving signal of each subcarrier; i is a natural number which is more than or equal to 0 and less than the number of occupied symbols in one subframe; obtaining a plurality of first receiving powers of all RBs corresponding to the ith symbol, and calculating the full-bandwidth average power on the ith symbol according to the plurality of first receiving powers; acquiring a neighbor cell receiving signal of each subcarrier from a receiving signal of each subcarrier of an RB on the ith symbol, and calculating neighbor cell receiving power of the RB on the ith symbol according to the neighbor cell receiving signal of each subcarrier; and judging whether adjacent cell interference exists on one RB according to the first receiving power, the full-bandwidth average power, the adjacent cell receiving power and a preset power threshold, and judging whether an adjacent cell parameter blind detection process is carried out on one RB.

Description

A kind of interference detection method and device

technical field

The present invention relates to detection technology in the communication field, and in particular, to a method and device for detecting interference.

Background technique

With the increasing demand of mobile communication users, high spectral efficiency is becoming one of the main requirements of mobile communication systems. In order to meet this demand, the 3rd Generation Partnership Project (3GPP) advanced long-term evolution system (LTE -A, Long Term Evolution Advanced) is expected to provide more flexible spectrum management by exploiting spectral efficiency. For example, carrier aggregation/heterogeneous network, etc. By taking the basic approach of compact frequency reuse, the flexibility of spectrum management can be improved, and thus the spectrum efficiency of multi-cell network can be improved, but this method will lead to strong inter-cell interference at the cell edge and cause serious performance degradation. In order to be able to cancel interference, in the prior art, the performance of cell edge user equipments (UEs, User Equipments) is improved by using Network Assisted Interference Cancellation and Suppression (NAICS, Network Assisted Interference Cancellation and Suppression).

In the process that the NAICS receiver cancels out the data of the interference source by explicitly demodulating it, the UE needs to obtain the parameter information of the main interfering Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel), so as to carry out further interference cancellation (IC, Interference Cancellation) or Interference Suppression (IS, Interference Suppression), that is, for the transmission mode based on cell-specific reference signals (CRS, Cell-specific reference signals), it is also necessary to The coding matrix indicator (PMI, Precoding Matrix Indicator), the number of layers (RI, Rayer Indicator), the modulation mode and the power compensation factor are performed blind detection.

In the prior art, for the transmission mode based on the cell-specific reference signal CRS, since the CRS and the PDSCH are not sent in a bundle, it is impossible to determine whether there is a PDSCH on the PRB by detecting the CRS during the interference detection process based on the CRS transmission mode. Therefore, it is necessary to perform blind detection on all interference parameters when it is uncertain whether there is PDSCH interference on the PRB, which increases the signaling overhead of the blind detection process and causes the defect of reduced interference elimination efficiency.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide an interference detection method and device. By determining whether there is PDSCH interference in adjacent cells on a PRB, a blind detection operation of adjacent cell parameters is implemented for PRBs with PDSCH interference, thereby reducing the signaling of the blind detection process. overhead, and effectively improve the efficiency of interference cancellation.

In order to achieve the above-mentioned purpose, the technical scheme of the embodiment of the present invention is realized as follows:

An embodiment of the present invention provides an interference detection method, and the method includes:

Obtain the received signal of each subcarrier in a resource module RB corresponding to the ith symbol, and calculate the first received power of the one RB on the ith symbol according to the received signal of each subcarrier; wherein, i is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe;

Obtain multiple first received powers of all RBs corresponding to the ith symbol, and calculate the full-bandwidth average power on the ith symbol according to the multiple first received powers;

Obtain the received signal of the neighbor cell of each subcarrier from the received signal of each subcarrier on the ith symbol of the one RB, and calculate the one RB according to the received signal of the neighbor cell of each subcarrier neighbor received power on the ith symbol;

According to the first received power, the full bandwidth average power, the adjacent cell received power and the preset power threshold, it is judged whether there is adjacent cell interference on the one RB, and then it is judged whether the adjacent cell is performed on the one RB. Parameter blind detection process.

In the above solution, the preset power threshold includes a preset absolute threshold and a preset relative threshold, and the preset power threshold is based on the first received power, the full-bandwidth average power, the neighboring cell received power, and the preset power threshold. , judging whether there is adjacent cell interference on the one RB, and then judging whether the adjacent cell parameter blind detection process is performed on the one RB, including:

A first ratio is obtained by performing a proportional operation on the first received power and the full-bandwidth average power;

If the first ratio is less than or equal to the preset absolute threshold, it is determined that the adjacent cell interference does not exist on the one RB, and then it is determined that the adjacent cell parameter blind detection process is not performed on the one RB;

If the first ratio is greater than the preset absolute threshold, secondly determine whether the neighbor exists on the one RB according to the first received power, the neighbor received power, and the preset relative threshold cell interference, and then judge for the second time whether the blind detection process of the neighboring cell parameters is performed on the one RB.

In the above solution, according to the first received power, the received power of the neighboring cell, and the preset relative threshold, the second judgment is made as to whether the neighboring cell interference exists on the one RB, and then the second judgment is made. Whether to perform the blind detection process of the neighbor cell parameters on the one RB, including:

Obtaining a second ratio by performing proportional operation on the received power of the adjacent cell and the first received power;

If the second ratio is greater than or equal to the preset relative threshold, it is determined that the adjacent cell interference exists on the one RB, and then it is determined that the adjacent cell parameter blind detection process is performed on the one RB;

If the second ratio is less than the preset relative threshold, it is determined that the adjacent cell interference does not exist on the one RB, and then it is determined that the adjacent cell parameter blind detection process is not performed on the one RB.

In the above solution, after calculating the first received power of the one RB on the i-th symbol according to the received signal of each subcarrier, the method further includes:

Obtain the first received power corresponding to the i+x-th symbol, the full-bandwidth average power corresponding to the i+x-th symbol, and the adjacent cell received power corresponding to the i+x-th symbol; where i+x is greater than or equal to 0 and A natural number less than the number of occupied symbols in a subframe, x is a non-zero integer;

Accumulating and calculating a plurality of first received powers corresponding to the i-th symbol and the i+x-th symbol of the one RB to obtain the accumulated received power of the one RB;

Accumulating and calculating the multiple full-bandwidth average powers corresponding to the i-th symbol and the i+x-th symbol to obtain the cumulative full-bandwidth average power;

Accumulate and calculate the received power of multiple adjacent cells corresponding to the i-th symbol and the i+x-th symbol of the one RB to obtain the accumulated adjacent cell received power of the one RB;

According to the accumulated received power, the accumulated full-bandwidth average power, the accumulated adjacent cell received power, and the preset power threshold, it is judged whether there is adjacent cell interference on the one RB, and then whether the one RB is judged whether there is adjacent cell interference. Carry out the blind detection process of neighboring cell parameters.

In the above solution, the preset power threshold includes a preset absolute threshold and a preset relative threshold, and the preset power threshold according to the accumulated received power, the accumulated full-bandwidth average power, the accumulated adjacent cell received power and the preset A power threshold is set to determine whether there is adjacent cell interference on the one RB, and then determine whether the adjacent cell parameter blind detection process is performed on the one RB, including:

A third ratio is obtained by performing a proportional operation on the accumulated received power and the accumulated full-bandwidth average power;

If the third ratio is less than or equal to the preset absolute threshold, it is determined that the adjacent cell interference does not exist on the one RB, and then it is determined that the adjacent cell parameter blind detection process is not performed on the one RB;

If the third ratio is greater than the preset absolute threshold, then according to the accumulated received power, the accumulated adjacent cell received power and the preset relative threshold, secondly determine whether the neighbor exists on the one RB cell interference, and then judge for the second time whether the blind detection process of the neighboring cell parameters is performed on the one RB.

In the above solution, according to the accumulated received power, the accumulated adjacent cell received power, and the preset relative threshold, the second judgment is made as to whether the adjacent cell interference exists on the one RB, and then the second judgment is made. Whether to perform the blind detection process of the neighbor cell parameters on the one RB, including:

A fourth ratio is obtained by performing a proportional operation on the accumulated adjacent cell received power and the accumulated received power;

If the fourth ratio is greater than or equal to the preset relative threshold, it is determined that the neighbor cell interference exists on the one RB, and then it is determined that the neighbor cell parameter blind detection process is performed on the one RB;

If the fourth ratio is less than the preset relative threshold, it is determined that the adjacent cell interference does not exist on the one RB, and then it is determined that the adjacent cell parameter blind detection process is not performed on the one RB.

An embodiment of the present invention provides an interference detection device, characterized in that the device includes an acquisition unit, a calculation unit, and a judgment unit,

The obtaining unit is used to obtain the received signal of each subcarrier in a resource module RB corresponding to the ith symbol; wherein, i is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe; and obtain the ith symbol a plurality of first received powers of all RBs corresponding to the symbol; and obtaining the adjacent cell received signal of each subcarrier from the received signal of each subcarrier of the one RB on the i-th symbol;

The calculation unit is configured to calculate the first received power of the one RB on the i-th symbol according to the received signal of each subcarrier; and calculate the first received power according to the plurality of first received powers The full-bandwidth average power on the ith symbol; and according to the received signal of the neighbor cell of each subcarrier, calculate the received power of the neighbor cell of the one RB on the ith symbol;

The judgment unit is configured to judge whether there is adjacent cell interference on the one RB according to the first received power, the full bandwidth average power, the adjacent cell received power, and a preset power threshold, and then judge the Whether the blind detection process of neighboring cell parameters is performed on an RB.

In the above solution, the preset power threshold includes a preset absolute threshold and a preset relative threshold, and the interference detection device further includes a blind detection unit,

The computing unit is further configured to obtain a first ratio by performing a proportional operation on the first received power and the full-bandwidth average power;

The judging unit is specifically configured to judge that the adjacent cell interference does not exist on the one RB if the first ratio is less than or equal to the preset absolute threshold; and if the first ratio is greater than the preset absolute threshold; Assuming an absolute threshold, then according to the first received power, the received power of the neighboring cell, and the preset relative threshold, it is judged twice whether there is interference from the neighboring cell on the one RB, and then the one RB is judged twice. Whether the blind detection process of the adjacent cell parameters is performed on the RB;

The blind detection unit is configured to end the process of blind detection of the adjacent cell parameters when it is determined that the adjacent cell interference does not exist on the one RB.

In the above solution, the calculation unit is further configured to obtain a second ratio by performing a proportional operation on the received power of the neighboring cell and the first received power;

The judging unit is further configured to judge that the adjacent cell interference exists on the one RB if the second ratio is greater than or equal to the preset relative threshold; and if the second ratio is less than the preset relative threshold; If a relative threshold is set, it is determined that the adjacent cell interference does not exist on the one RB;

The blind detection unit is further configured to perform the blind detection process of the adjacent cell parameters on the one RB when it is determined that the adjacent cell interference exists on the one RB.

In the above solution, the obtaining unit is further configured to obtain the i+x th symbol after calculating the first received power of the one RB on the ith symbol according to the received signal of each subcarrier The first received power corresponding to the symbol, the full-bandwidth average power corresponding to the i+x symbol, and the adjacent cell received power corresponding to the i+x symbol; where i+x is greater than or equal to 0 and less than one subframe A natural number that occupies a signed number, x is a non-zero integer;

The calculation unit is further configured to perform cumulative calculation on a plurality of first received powers corresponding to the i-th symbol and the i+x-th symbol of the one RB to obtain the cumulative received power of the one RB ; Accumulate multiple full-bandwidth average powers corresponding to the i-th symbol and the i+x-th symbol to obtain the accumulated full-bandwidth average power; Accumulate and calculate the received powers of multiple adjacent cells corresponding to the i+x-th symbol to obtain the accumulated received power of adjacent cells of the one RB;

The judgment unit is configured to judge whether there is adjacent cell interference on the one RB according to the accumulated received power, the accumulated full bandwidth average power, the accumulated adjacent cell received power and the preset power threshold, and then It is judged whether the blind detection process of neighboring cell parameters is performed on the one RB.

In the above solution, the preset power threshold includes a preset absolute threshold and a preset relative threshold, and the interference detection device further includes a blind detection unit,

The computing unit is further configured to obtain a third ratio by performing a proportional operation on the accumulated received power and the accumulated full-bandwidth average power;

The judging unit is further configured to judge that the adjacent cell interference does not exist on the one RB if the third ratio is less than or equal to the preset absolute threshold; and if the third ratio is greater than the A preset absolute threshold, then according to the accumulated received power, the accumulated adjacent cell received power, and the preset relative threshold, it is judged twice whether the adjacent cell interference exists on the one RB, and then the second judgment is made of the adjacent cell interference. Whether the blind detection process of the adjacent cell parameters is performed on one RB;

The blind detection unit is configured to end the process of blind detection of the adjacent cell parameters when it is determined that the adjacent cell interference does not exist on the one RB.

In the above solution, the calculation unit is further configured to obtain a fourth ratio by performing a proportional operation on the accumulated adjacent cell received power and the accumulated received power;

The judging unit is further configured to judge that the adjacent cell interference exists on the one RB if the fourth ratio is greater than or equal to the preset relative threshold; and if the fourth ratio is less than the preset relative threshold; If a relative threshold is set, it is determined that the adjacent cell interference does not exist on the one RB;

The blind detection unit is further configured to perform the blind detection process of the adjacent cell parameters on the one RB when it is determined that the adjacent cell interference exists on the one RB.

In the technical solution of the embodiment of the present invention, the received signal of each subcarrier in a resource module RB corresponding to the ith symbol is obtained, and according to the received signal of each subcarrier, the first RB on the ith symbol of the above-mentioned one RB is calculated. received power; wherein, i is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe; obtain multiple first received powers of all RBs corresponding to the ith symbol, and calculate the first received power according to the multiple first received powers The full-bandwidth average power on the i symbols; the received signal of each sub-carrier is obtained from the received signal of each sub-carrier on the ith symbol of the above-mentioned one RB, and the received signal of each sub-carrier is calculated according to the received signal of the adjacent area of each sub-carrier. The adjacent cell received power of the above-mentioned one RB on the ith symbol; according to the above-mentioned first received power, the above-mentioned full-bandwidth average power, the above-mentioned adjacent cell received power and the preset power threshold, it is judged whether there is adjacent cell interference on the above-mentioned one RB, Then, it is judged whether the blind detection process of adjacent cell parameters is performed on the above-mentioned one RB. It can be seen that, in the interference detection method and device proposed in the embodiments of the present invention, before blind detection of interference parameters, it can be determined whether there is PDSCH interference of adjacent cells on the PRB, and when there is no PDSCH interference of adjacent cells, it can be The blind detection operation is ended, and the blind detection operation is implemented for PRBs with PDSCH interference, thereby reducing the signaling overhead of the blind detection process, and effectively improving the efficiency of interference elimination; in addition, it is simple and convenient to implement, easy to popularize, and applicable wider range.

Description of drawings

Fig. 1 is the interference cancellation flow chart in the NAICS receiver;

FIG. 2 is a schematic diagram 1 of an implementation flow of an interference detection method proposed by an embodiment of the present invention;

3 is a schematic diagram 2 of an implementation flow of an interference detection method proposed in an embodiment of the present invention;

4 is a schematic diagram 3 of an implementation flow of an interference detection method proposed by an embodiment of the present invention;

FIG. 5 is a schematic diagram 4 of an implementation flow of an interference detection method proposed by an embodiment of the present invention;

FIG. 6 is a schematic diagram 5 of an implementation flow of an interference detection method proposed by an embodiment of the present invention;

FIG. 7 is a schematic diagram 6 of the implementation flow of an interference detection method proposed by an embodiment of the present invention;

8 is a comparison diagram of the present invention for detecting the existence of interference in adjacent cells and ideal detection performance under NAICS mode;

FIG. 9 is a schematic diagram 1 of the composition structure of an interference detection device proposed by an embodiment of the present invention;

FIG. 10 is a second schematic diagram of the composition and structure of an interference detection apparatus according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Since the NAICS receiver mainly eliminates the interference of the strong neighboring cell to the serving cell, it is assumed that neighboring cell 1 is a strong interfering cell, and neighboring cell 2 is a weakly interfering cell, so it is necessary to perform blind parameter detection on neighboring cell 1. Figure 1 shows the NAICS receiver. Interference cancellation flowchart. As shown in Figure 1, the receiving end receives the signal, and after radio frequency (RF, Radio Frequency) and Fast Fourier Transformation (FFT, Fast Fourier Transformation) processing, the i-th Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division) is obtained. Multiplexing) The received signal Y(i,m) on the mth subcarrier of the symbol, after estimating the serving cell signal, the mth subcarrier of the ith OFDM symbol is reconstructed by removing the transmit signal X(i,m) of the serving cell. The adjacent cell signal on the carrier is denoted as Y _NC (i,m). The NAICS receiver mainly performs blind parameter detection on the adjacent cell 1. Therefore, it is necessary to perform residual noise whitening on the adjacent cell 2 signal and noise. The whitened adjacent cell The received signal is denoted as Y _NC1 (i,m), and finally the primary interference cell signal can be reconstructed and eliminated for the whitened adjacent cell received signal Y _NC1 (i,m) according to the above received signal Y(i,m), and Perform multiple-input multiple-output (MIMO, Multiple-Input Multiple-Output) detection.

It should be noted that, in the embodiment of the present invention, when the NAICS receiver eliminates the interference of the strong neighbor area to the serving cell, the received signal Y(i,m) on the mth subcarrier of the ith OFDM symbol is obtained and the neighbor is whitened. The detection of PDSCH interference is implemented on the basis of the cell 2 signal and the adjacent cell received signal Y _NC1 (i,m) of the noise.

Example 1

FIG. 2 is a schematic diagram 1 of the implementation flow of an interference detection method proposed by an embodiment of the present invention. As shown in FIG. 2 , in a specific embodiment of the present invention, the method for detecting PDSCH interference in a neighboring cell mainly includes the following steps:

Step 101, obtain the received signal of each subcarrier in a resource module RB corresponding to the ith symbol, and calculate the first received power of the above-mentioned one RB on the ith symbol according to the received signal of each subcarrier; wherein, i is A natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe.

In a specific embodiment of the present invention, the device obtains the received signal of each subcarrier of a resource module RB corresponding to the ith symbol, and then calculates the received signal of each subcarrier in the above-mentioned one resource module RB according to the received signal of the above-mentioned one RB in the ith symbol. first received power over symbols.

Further, in a specific embodiment of the present invention, the above-mentioned symbol may be an OFDM symbol, and the above-mentioned resource module RB includes multiple subcarriers, for example, one RB includes 12 subcarriers.

Further, in a specific embodiment of the present invention, i represents the position of an OFDM symbol in a subframe. For example, a subframe includes 14 symbols, and the ith symbol is any one of 0 to 13 symbols. Preferably, in the specific embodiment of the present invention, the i-th symbol should select a symbol position that does not contain pilots.

Further, in a specific embodiment of the present invention, the first received power of the above-mentioned one RB on the ith symbol is the sum of the received powers corresponding to the received signals of each subcarrier in the above-mentioned one RB.

Further, in a specific embodiment of the present invention, if the received signal on the mth subcarrier of the ith OFDM symbol is Y(i,m), the kth OFDM symbol of the ith OFDM symbol can be obtained according to formula (1). The first received power P _Y (i,k) of the received signal on the RB (one RB), where i is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe, and k is a natural number greater than or equal to 0.

为每个RB在频域占用的子载波数。In formula (1),

is the number of subcarriers occupied by each RB in the frequency domain.

Step 102: Obtain multiple first received powers of all RBs corresponding to the ith symbol, and calculate the full-bandwidth average power on the ith symbol according to the multiple first received powers.

In a specific embodiment of the present invention, after calculating and obtaining the first received power of the above-mentioned one RB, the apparatus may obtain multiple first received powers of all RBs corresponding to the ith symbol, and then according to the above-mentioned multiple first received powers , and calculate the full-bandwidth average power corresponding to the ith symbol.

如下：Further, in a specific embodiment of the present invention, after calculating and obtaining the first received power P _Y (i,k) of the signal received on the k-th RB of the i-th OFDM symbol, the device can calculate and obtain according to formula (2). The full bandwidth average power corresponding to the ith symbol

as follows:

为下行传输带宽。Among them, {A} is the set of RBs allocated by the serving cell, K is the number of allocated RBs,

for the downlink transmission bandwidth.

Further, in a specific embodiment of the present invention, by calculating the first received power P _Y (i,k) of the signal received on the k-th RB of the i-th OFDM symbol according to the above formula (2), it can be Obtain the full bandwidth average power corresponding to the ith symbol.

Step 103, obtain the adjacent area received signal of each subcarrier from the received signal of each subcarrier on the ith symbol of an RB, calculate the above-mentioned one RB on the ith symbol according to the adjacent area received signal of each subcarrier Received power of neighboring cells.

In a specific embodiment of the present invention, after acquiring the received signal of each subcarrier in a resource module RB corresponding to the ith symbol, the device may acquire the adjacent cell received signal of each subcarrier from the received signal of each subcarrier, According to the received signal of the adjacent cell of each subcarrier, the received power of the adjacent cell of the above-mentioned one RB on the ith symbol is calculated.

Further, in the specific embodiment of the present invention, in order to determine whether there is interference in the adjacent cell, the device needs to know the power of the adjacent cell signal.

Further, in a specific embodiment of the present invention, a whitening operation is performed on the received signal Y(i,m) of each of the above-mentioned sub-carriers to remove the signal and noise of the weakly interfering cell, so as to obtain the whitened signal of each sub-carrier, that is, The neighbor cell of each subcarrier receives the signal Y _NC1 (i,m).

如下：Further, in a specific embodiment of the present invention, the apparatus may perform calculation according to formula (3) to obtain the received power of the adjacent cell of the kth RB of the i-th symbol above

as follows:

Further, in the specific embodiment of the present invention, by calculating the received signal Y _NC1 (i,m) in the adjacent area of each subcarrier in an RB corresponding to the i-th OFDM symbol according to the above formula (3), The adjacent cell received power of one RB corresponding to the ith symbol can be obtained.

Step 104 , according to the first received power, the full bandwidth average power, the adjacent cell received power and the preset power threshold, determine whether there is adjacent cell interference on the above-mentioned one RB, and then determine whether the above-mentioned one RB performs a process of blind detection of adjacent cell parameters.

第i个符号对应的一个RB的邻区接收功率

之后，可以根据上述第一接收功率、全带宽平均功率、邻区接收功率和预设功率门限判断上述一个RB上是否存在邻区干扰，进而判断上述一个RB上是否进行邻区参数盲检流程。In a specific embodiment of the present invention, the apparatus obtains the first received power P _Y (i,k) of one RB of the i-th OFDM symbol, and the full-bandwidth average power corresponding to the i-th symbol

Neighboring cell received power of one RB corresponding to the i-th symbol

Afterwards, it can be judged whether there is adjacent cell interference on the above-mentioned one RB according to the above-mentioned first received power, the average power of the whole bandwidth, the adjacent cell received power and the preset power threshold, and then it can be judged whether the above-mentioned one RB is subjected to a blind detection process of adjacent cell parameters.

Further, in a specific embodiment of the present invention, the preset power threshold may include a preset absolute threshold and a preset relative threshold, wherein the values of the preset absolute threshold and the preset relative threshold can be configured. Preferably, the present invention In a specific embodiment, the preset absolute threshold is set as 0.25, and the preset relative threshold is set as 0.5.

Further, in the specific embodiment of the present invention, when the above-mentioned first received power is much smaller than the above-mentioned full-bandwidth average power, it can be considered that the probability of interference on the above-mentioned one RB is very low, that is, it can be considered that there is no adjacent neighbor on the above-mentioned one RB. PDSCH interference in the zone.

Further, in a specific embodiment of the present invention, when the above-mentioned first received power does not satisfy the condition that the above-mentioned first received power is far less than the above-mentioned condition of the above-mentioned full-bandwidth average power, the device can further determine the relative magnitude of the above-mentioned first received power and the above-mentioned adjacent cell received power according to The relationship is used to determine whether there is PDSCH interference of a neighboring cell on the above-mentioned one RB.

In a specific embodiment of the present invention, after judging whether there is adjacent cell interference on the above-mentioned one RB according to the first received power, the full-bandwidth average power, the adjacent cell received power and the preset power threshold, if it is judged that the above-mentioned one RB does not have adjacent cell interference If there is adjacent cell interference, the apparatus ends the process of blind detection of adjacent cell parameters on the above-mentioned one RB.

Further, in the specific embodiment of the present invention, if there is no PDSCH interference in the adjacent cell on the above-mentioned one RB, then the device does not need to perform the transmission mode, precoding matrix indication, layer number, modulation method on the above-mentioned one RB. and parameters such as power compensation factor to perform blind detection operation.

Further, in the specific embodiment of the present invention, if the judgment result is that there is PDSCH interference of adjacent cells on the above-mentioned one RB, then the device can continue to perform the above-mentioned one RB on the transmission mode, precoding matrix indication, layer number, modulation. Blind detection operation is performed according to parameters such as mode and power compensation factor.

In an interference detection method provided by an embodiment of the present invention, a received signal of each subcarrier in a resource module RB corresponding to the ith symbol is obtained, and according to the received signal of each subcarrier, the above-mentioned one RB is calculated on the ith symbol. where i is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe; obtain multiple first received powers of all RBs corresponding to the i-th symbol, according to the above-mentioned multiple first received powers , calculate the full-bandwidth average power on the ith symbol; obtain the adjacent area received signal of each subcarrier from the received signal of each subcarrier on the ith symbol of the above-mentioned one RB, and receive the adjacent area according to the above-mentioned each subcarrier signal, calculate the adjacent cell received power of the above-mentioned one RB on the ith symbol; according to the above-mentioned first received power, the above-mentioned full-bandwidth average power, the above-mentioned adjacent cell received power and the preset power threshold, judge whether there is adjacent cell on the above-mentioned one RB. cell interference, and then it is judged whether the blind detection process of neighboring cell parameters is performed on the above-mentioned one RB. It can be seen that the interference detection method proposed by the embodiment of the present invention can realize the blind detection operation of adjacent cell parameters for PRBs with PDSCH interference by determining whether there is PDSCH interference of adjacent cells on the PRB, thereby reducing blind detection. The signaling overhead of the process is effectively improved, and the efficiency of interference elimination is effectively improved; in addition, it is simple and convenient to implement, easy to popularize, and has a wider application range.

Embodiment 2

Based on Embodiment 1, FIG. 3 is a schematic diagram 2 of an implementation flowchart of an interference detection method proposed by an embodiment of the present invention. As shown in FIG. 3 , in a specific embodiment of the present invention, it is determined whether there is adjacent cell interference on the above-mentioned one RB , and then the method for judging whether the blind detection process of neighboring cell parameters is performed on the above-mentioned one RB mainly includes the following steps:

Step 104a: Obtain a first ratio by performing a proportional operation between the first received power and the full-bandwidth average power.

之后，可以对上述第一接收功率和上述全带宽平均功率进行比例运算，获得第一比值。In a specific embodiment of the present invention, the apparatus obtains the first received power P _Y (i,k) of one RB of the i-th OFDM symbol, and the full-bandwidth average power corresponding to the i-th symbol

Afterwards, a ratio operation may be performed on the above-mentioned first received power and the above-mentioned full-bandwidth average power to obtain a first ratio.

Step 104b: If the first ratio is less than or equal to a preset absolute threshold, it is determined that there is no adjacent cell interference on the above-mentioned one RB, and then it is determined that the above-mentioned one RB does not perform a blind detection process of adjacent cell parameters.

In a specific embodiment of the present invention, the apparatus performs a proportional operation on the above-mentioned first received power and the above-mentioned full-bandwidth average power, and after obtaining the first ratio, compares the first ratio with a preset absolute threshold, and when the first ratio is less than or equal to When the absolute threshold is preset, it can be considered that there is no adjacent cell interference on the above-mentioned one RB, and then it is determined that the above-mentioned one RB does not perform a blind detection process of adjacent cell parameters.

Further, in a specific embodiment of the present invention, when the preset absolute threshold value is 0.25, and the first ratio is less than 0.25, that is, the ratio of the above-mentioned first received power to the above-mentioned full-bandwidth average power is less than 0.25, it can be considered that the above-mentioned The first received power is much smaller than the above-mentioned full-bandwidth average power, that is to say, the probability of generating interference is small, that is, there is no adjacent cell interference on the above-mentioned one RB.

In a specific embodiment of the present invention, after judging whether there is adjacent cell interference on the above-mentioned one RB according to the first received power, the full-bandwidth average power, the adjacent cell received power and the preset power threshold, if it is judged that the above-mentioned one RB does not have adjacent cell interference If there is adjacent cell interference, the apparatus ends the process of blind detection of adjacent cell parameters on the above-mentioned one RB.

Step 104c, if the first ratio is greater than the preset absolute threshold, then according to the first received power, the adjacent cell received power and the preset relative threshold, it is judged twice whether there is adjacent cell interference on the above-mentioned one RB, and then the above-mentioned one RB is judged twice. Whether to perform the blind detection process of neighboring cell parameters.

In a specific embodiment of the present invention, after obtaining the first ratio, the device compares the first ratio with a preset absolute threshold, and when the first ratio is greater than the preset absolute threshold, the and preset a relative threshold, judge for a second time whether there is adjacent cell interference on the above-mentioned one RB, and then judge for a second time whether the above-mentioned one RB performs a blind detection process of adjacent cell parameters.

Further, in a specific embodiment of the present invention, when the first ratio is greater than the preset absolute threshold, it cannot be determined whether there is adjacent cell interference on the above-mentioned one RB, and the device needs to determine whether there is adjacent cell interference on the above-mentioned one RB. A relative threshold is preset to perform a second judgment, so as to determine whether there is adjacent cell interference on the above-mentioned one RB, and then it is judged for a second time whether the above-mentioned one RB is subjected to a process of blind detection of adjacent cell parameters.

To sum up, in a specific embodiment of the present invention, through the above steps 104a-104c, the interference detection device can obtain the first ratio by performing proportional operation on the first received power and the full-bandwidth average power, and use the first ratio to calculate the first ratio. Compared with the preset absolute threshold, when the first ratio is less than or equal to the preset absolute threshold, it can be determined that there is no adjacent cell interference on the above-mentioned one RB, so that by ending the blind detection operation of the adjacent cell parameters, the blind detection process is reduced. The signaling overhead is increased, and the efficiency of interference cancellation is effectively improved.

Embodiment 3

Based on the second embodiment, FIG. 4 is a schematic diagram of the implementation flow of an interference detection method proposed by the embodiment of the present invention. As shown in FIG. 4 , in a specific embodiment of the present invention, it is determined whether there is adjacent cell interference on the above-mentioned one RB The method also includes the following steps:

Step 104c-1: Obtain a second ratio by performing a proportional operation on the adjacent cell received power and the first received power.

和上述第i个 OFDM符号一个RB的第一接收功率P_Y(i,k)进行比例运算，获得第二比值。In a specific embodiment of the present invention, when the above-mentioned first ratio is greater than the preset absolute threshold, the device needs to receive power for the adjacent cell of an RB corresponding to the above-mentioned i-th symbol

A ratio operation is performed with the first received power P _Y (i,k) of one RB in the i-th OFDM symbol to obtain a second ratio.

Step 104c-2: If the second ratio is greater than or equal to a preset relative threshold, it is determined that there is adjacent cell interference on the above-mentioned one RB, and then it is determined that the above-mentioned one RB performs a blind detection process of adjacent cell parameters.

In a specific embodiment of the present invention, the apparatus performs a proportional operation on the above-mentioned adjacent cell received power and the above-mentioned first received power, and after obtaining a second ratio, compares the second ratio with a preset relative threshold, and when the second ratio is greater than or equal to When the relative threshold is preset, it can be considered that there is adjacent cell interference on the above-mentioned one RB, and then it is determined that the above-mentioned one RB performs a blind detection process of adjacent cell parameters.

Step 104c-3: If the second ratio is smaller than the preset relative threshold, it is determined that there is no adjacent cell interference on the above-mentioned one RB, and then it is judged that the above-mentioned one RB does not perform a blind detection process of adjacent cell parameters.

In a specific embodiment of the present invention, after obtaining the second ratio, the device compares the second ratio with a preset relative threshold, and when the second ratio is less than the preset relative threshold, it can be considered that there is no adjacent cell on the above-mentioned one RB. interference, and then it is judged that the blind detection process of neighboring cell parameters is not performed on the above-mentioned one RB.

Further, in a specific embodiment of the present invention, when the preset relative threshold value is 0.5, the second ratio is less than 0.5, that is, the ratio of the received power of the adjacent cell to the first received power is less than 0.5, then it can be considered that the above The adjacent cell received power is much smaller than the above-mentioned first received power, that is to say, the probability of interference is small, that is, there is no adjacent cell interference on the above-mentioned one RB, and then it is judged that the above-mentioned one RB does not perform the adjacent cell parameter blind detection process.

To sum up, in a specific embodiment of the present invention, through the above steps 104c-1 to 104c-3, the interference detection device can obtain the second ratio by performing a proportional operation on the received power of the adjacent cell and the first received power, and The second ratio is compared with the preset relative threshold, and when the second ratio is smaller than the preset relative threshold, it can be determined that there is no adjacent cell interference on the above-mentioned one RB, so that by ending the blind detection operation of the adjacent cell parameters, the reduction of the The signaling overhead of the blind detection process is effectively improved, and the efficiency of interference cancellation is effectively improved.

Embodiment 4

Based on Embodiment 1, FIG. 5 is a schematic diagram 4 of an implementation flowchart of an interference detection method proposed by an embodiment of the present invention. As shown in FIG. 5 , in a specific embodiment of the present invention, the apparatus is receiving signals according to each subcarrier, After calculating the first received power of an RB on the ith symbol, the method for detecting PDSCH interference in a neighboring cell further includes the following steps:

Step 201: Obtain the first received power corresponding to the i+xth symbol, the full-bandwidth average power corresponding to the i+xth symbol, and the adjacent cell received power corresponding to the i+xth symbol; wherein, i+x is greater than A natural number equal to 0 and less than the number of occupied symbols in a subframe, and x is a non-zero integer.

In a specific embodiment of the present invention, the apparatus may obtain the first received power corresponding to the i+x-th symbol, the full-bandwidth average power corresponding to the i+x-th symbol, and the i+ The received power of adjacent cells corresponding to x symbols; wherein, i+x is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe, and x is a non-zero integer.

Further, in a specific embodiment of the present invention, in order to improve the accuracy of interference detection, the apparatus can use the methods from steps 101 to 103 above to calculate and obtain the first received power, the full-bandwidth average power and the corresponding to multiple different symbols. Adjacent cell received power.

Further, in a specific embodiment of the present invention, i+x represents the position of an OFDM symbol in a subframe, therefore, i+x is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe, and i+x is not equal to i, so x is a non-zero integer. For example, if a subframe includes 14 symbols, i+x is any natural number from 0 to 13. For example, the i-th symbol can be the third symbol, and the i+x-th symbol can be the first symbol. Or, the 4th symbol, or, the 7th symbol.

In a specific embodiment of the present invention, preferably, in order to increase the number of calculated samples, the i+x-th symbol should select a symbol position that does not contain pilots.

It should be noted that, in the specific embodiment of the present invention, the above-mentioned multiple different symbols are some symbols in the same subframe. For example, for the nth subframe, the first received power, the full bandwidth average power, and the neighbor received power corresponding to the ith symbol in the nth subframe can be calculated and obtained separately, and the i-3th in the nth subframe The first received power, the full bandwidth average power, and the adjacent cell received power corresponding to the symbol, and the first received power, the full bandwidth average power, and the adjacent cell received power corresponding to the i+5th symbol in the nth subframe. Preferably, in the specific embodiment of the present invention, at least 3 different symbols may be selected for calculation in the nth subframe.

Step 202: Accumulate and calculate a plurality of first received powers corresponding to the i-th symbol and the i+x-th symbol of the above-mentioned one RB to obtain the accumulated received power of the above-mentioned one RB.

In a specific embodiment of the present invention, after obtaining the plurality of first received powers corresponding to the i-th symbol and the i+x-th symbol of the above-mentioned one RB through calculation in the above-mentioned step 101, the apparatus may The power is accumulated and calculated, so as to obtain the accumulated received power of the above-mentioned one RB.

Further, in a specific embodiment of the present invention, if the first received power of the kth RB corresponding to the ith OFDM symbol in the nth subframe is P _Y (i,k), then according to formula (4) The accumulated received power P _Y (n,k) of the k-th RB corresponding to the n-th subframe can be obtained by calculation, as follows:

Wherein, L represents that L OFDM symbols are selected in the nth subframe, that is, the ith symbol and the i+xth symbol include i ₀ , i ₁ , . . . i _L-1 .

Further, in a specific embodiment of the present invention, the above-mentioned accumulated received power may be performed on multiple first received powers corresponding to multiple symbols such as the i-th symbol, the i-3-th symbol, and the i+5-th symbol. obtained by cumulative calculation.

Step 203: Accumulate and calculate the multiple full-bandwidth average powers corresponding to the i-th symbol and the i+x-th symbol to obtain the accumulated full-bandwidth average power.

In a specific embodiment of the present invention, after calculating and obtaining multiple full-bandwidth average powers corresponding to the i-th symbol and the i+x-th symbol through the above-mentioned step 102, the device may perform cumulative calculation on the above-mentioned full-bandwidth average power, so that Obtains the accumulated full bandwidth average power.

那么根据公式(5)可以计算获得第n 个子帧对应的累加全带宽平均功率

如下：Further, in the specific embodiment of the present invention, if the full bandwidth average power corresponding to the i-th OFDM symbol in the n-th subframe is

Then, according to formula (5), the accumulated full bandwidth average power corresponding to the nth subframe can be calculated and obtained

as follows:

Further, in a specific embodiment of the present invention, the above-mentioned accumulated full-bandwidth average power may be a plurality of full-bandwidth averages corresponding to multiple symbols such as the ith symbol, the ith-3rd symbol, and the ith+5th symbol. The power is obtained by cumulative calculation.

Step 204: Accumulate and calculate the received powers of multiple adjacent cells corresponding to the i-th symbol and the i+x-th symbol of the above-mentioned one RB to obtain the cumulative received power of the above-mentioned adjacent cells for the above-mentioned one RB.

In a specific embodiment of the present invention, after obtaining the received power of multiple adjacent cells corresponding to the i-th symbol and the i+x-th symbol of the above-mentioned one RB through calculation in the above-mentioned step 103, the device may perform a calculation on the above-mentioned adjacent cell received power. The accumulated calculation is performed to obtain the accumulated received power of the adjacent cell of the above-mentioned one RB.

那么根据公式(6)可以计算获得第n个子帧对应的第k个RB的累加邻区接收功率

如下：Further, in the specific embodiment of the present invention, if the received power of the adjacent cell of the kth RB corresponding to the ith OFDM symbol in the nth subframe is

Then according to formula (6), the accumulated adjacent cell received power of the kth RB corresponding to the nth subframe can be calculated and obtained

as follows:

Further, in a specific embodiment of the present invention, the above-mentioned accumulated adjacent cell received power may be received for multiple adjacent cells corresponding to multiple symbols such as the i-th symbol, the i-3 symbol, and the i+5-th symbol. The power is obtained by cumulative calculation.

Step 205, according to the accumulated received power, the accumulated full bandwidth average power, the accumulated adjacent cell received power and the preset power threshold, determine whether there is adjacent cell interference on the above-mentioned one RB, and then judge whether the above-mentioned one RB is performed on the adjacent cell parameter blind detection process. .

累加邻区接收功率

和预设功率门限判断上述一个RB上是否存在邻区干扰，进而判断上述一个RB上是否进行邻区参数盲检流程。In a specific embodiment of the present invention, after the device obtains the accumulated received power corresponding to the i-th symbol and the i+x-th symbol, the accumulated full-bandwidth average power, and the accumulated adjacent cell received power, the accumulated received power P _Y (n ,k), accumulated full bandwidth average power

Accumulate adjacent cell received power

and a preset power threshold to determine whether there is adjacent cell interference on the above-mentioned one RB, and then to determine whether the above-mentioned one RB performs a blind detection process of adjacent cell parameters.

Further, in a specific embodiment of the present invention, the device judges whether there is adjacent cell interference on the above-mentioned one RB according to the accumulated received power, the accumulated full-bandwidth average power, the accumulated adjacent cell received power and the preset power threshold, which can improve the interference detection efficiency. accuracy.

Further, the preset power threshold may include a preset absolute threshold and a preset relative threshold, wherein the values of the preset absolute threshold and the preset relative threshold can be configured. Preferably, in the specific embodiment of the present invention, the preset absolute threshold is set. The threshold is 0.25, and the preset relative threshold is 0.5.

An interference detection method provided by an embodiment of the present invention obtains the first received power corresponding to the i+xth symbol, the full-bandwidth average power corresponding to the i+xth symbol, and the adjacent cell reception power corresponding to the i+xth symbol Power; where i+x is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe, and x is a non-0 integer; 1. Accumulate and calculate the received power to obtain the accumulated received power of the above-mentioned one RB; Accumulate and calculate the multiple full-bandwidth average powers corresponding to the i-th symbol and the i+x-th symbol to obtain the accumulated full-bandwidth average power; For the above one The RB performs cumulative calculation on the received power of multiple adjacent cells corresponding to the i-th symbol and the i+x-th symbol to obtain the cumulative received power of the above-mentioned RB in adjacent cells; The received power and the preset power threshold determine whether there is adjacent cell interference on the above-mentioned one RB, and then determine whether the above-mentioned one RB performs a blind detection process of adjacent cell parameters, thereby improving the accuracy of the interference detection result.

Embodiment 5

Based on the fourth embodiment, FIG. 6 is a schematic flowchart of the implementation of an interference detection method proposed in the embodiment of the present invention. As shown in FIG. 6 , in a specific embodiment of the present invention, it is determined whether there is adjacent cell interference on the above-mentioned one RB The method mainly includes the following steps:

Step 205a: Obtain a third ratio by performing a proportional operation on the accumulated received power and the accumulated full-bandwidth average power.

之后，可以对上述累加接收功率和上述累加全带宽平均功率进行比例运算，获得第三比值。In a specific embodiment of the present invention, the apparatus obtains the accumulated received power P _Y (n,k) of the k-th RB corresponding to the n-th subframe, and the accumulated full-bandwidth average power corresponding to the n-th sub-frame

Afterwards, a ratio operation may be performed on the above-mentioned accumulated received power and the above-mentioned accumulated full-bandwidth average power to obtain a third ratio.

Step 205b: If the third ratio is less than or equal to the preset absolute threshold, it is judged that there is no adjacent cell interference on the above-mentioned one RB, and then it is judged that the above-mentioned one RB does not perform a blind detection process of adjacent cell parameters.

In a specific embodiment of the present invention, the apparatus performs a proportional operation on the above-mentioned accumulated received power and the above-mentioned accumulated full-bandwidth average power, and after obtaining a third ratio, compares the third ratio with a preset absolute threshold, and when the third ratio is less than or equal to When the absolute threshold is preset, it can be considered that there is no adjacent cell interference on the kth RB corresponding to the nth subframe, and then it is judged that no neighbor cell parameter blind detection process is performed on the kth RB corresponding to the nth subframe.

Further, in a specific embodiment of the present invention, when the preset absolute threshold value is 0.25, the third ratio is less than 0.25, that is, the ratio between the above-mentioned accumulated received power and the above-mentioned accumulated full-bandwidth average power is less than 0.25, then it can be considered that the above-mentioned The cumulative received power is much smaller than the above-mentioned cumulative full-bandwidth average power, that is to say, the probability of generating interference on the kth RB corresponding to the nth subframe above is small, that is, there is no adjacent neighbor on the kth RB corresponding to the nth subframe. area interference.

Step 205c, if the third ratio is greater than the preset absolute threshold, then according to the accumulated received power, the accumulated adjacent cell received power and the preset relative threshold, it is judged twice whether there is adjacent cell interference on the above-mentioned one RB, and then the above-mentioned one RB is judged twice. Whether to perform the blind detection process of neighboring cell parameters.

In a specific embodiment of the present invention, after obtaining the third ratio, the device compares the third ratio with the preset absolute threshold, and when the third ratio is greater than the preset absolute threshold, then according to the accumulated received power and the accumulated adjacent cell received power and a preset relative threshold to determine whether adjacent cell interference exists on the k th RB corresponding to the n th subframe, and then judge for a second time whether the adjacent cell parameter blind detection process is performed on the k th RB corresponding to the n th subframe.

Further, in a specific embodiment of the present invention, when the third ratio is greater than the preset absolute threshold, it cannot be determined whether there is adjacent cell interference on the kth RB corresponding to the nth subframe, and the device needs to receive according to the accumulated The power, the accumulated adjacent cell received power, and the preset relative threshold are judged again, so as to determine whether there is adjacent cell interference on the kth RB corresponding to the nth subframe, and then judge the kth corresponding to the nth subframe for the second time. Whether the blind detection process of neighboring cell parameters is performed on the RB.

To sum up, in a specific embodiment of the present invention, through the above steps 205a-205c, the interference detection device can obtain a third ratio by performing proportional operation on the accumulated received power and the accumulated full-bandwidth average power, and use the third ratio Compared with the preset absolute threshold, when the third ratio is less than or equal to the preset absolute threshold, it can be determined that there is no adjacent cell interference on the kth RB corresponding to the nth subframe, so that the blind detection operation of the adjacent cell parameters is terminated by , the signaling overhead of the blind detection process is reduced, and the efficiency of interference elimination is effectively improved.

Embodiment 6

Based on Embodiment 5, FIG. 7 is a schematic diagram 6 of an implementation flowchart of an interference detection method proposed by an embodiment of the present invention. As shown in FIG. 7 , in a specific embodiment of the present invention, it is determined whether there is adjacent cell interference on the above-mentioned one RB The method also includes the following steps:

Step 205c-1: Obtain a fourth ratio by performing a proportional operation on the accumulated adjacent cell received power and the accumulated received power.

和上述第 n个子帧对应的第k个RB的累加接收功率P_Y(n,k)进行比例运算，获得第四比值。In a specific embodiment of the present invention, when the above-mentioned third ratio is greater than the preset absolute threshold, the apparatus needs to accumulate the received power of the adjacent cell of the k-th RB corresponding to the above-mentioned n-th subframe

A ratio operation is performed on the accumulated received power P _Y (n, k) of the k th RB corresponding to the above n th subframe to obtain a fourth ratio.

Step 205c-2: If the fourth ratio is greater than or equal to a preset relative threshold, it is judged that there is adjacent cell interference on the above-mentioned one RB, and then it is judged that the above-mentioned one RB performs a blind detection process of adjacent cell parameters.

In a specific embodiment of the present invention, the apparatus performs a proportional operation on the above-mentioned accumulated adjacent cell received power and the above-mentioned accumulated received power, and after obtaining a fourth ratio, compares the fourth ratio with a preset relative threshold, and when the fourth ratio is greater than or equal to When the relative threshold is preset, it can be considered that there is neighbor interference on the kth RB corresponding to the nth subframe, and then it is determined that the process of blind detection of neighbor cell parameters is performed on the kth RB corresponding to the nth subframe.

Step 205c-3: If the fourth ratio is smaller than the preset relative threshold, it is determined that there is no adjacent cell interference on the above-mentioned one RB, and then it is determined that the above-mentioned one RB does not perform a blind detection process of adjacent cell parameters.

In a specific embodiment of the present invention, after obtaining the fourth ratio, the device compares the fourth ratio with a preset relative threshold, and when the fourth ratio is less than the preset relative threshold, it can be considered that the nth subframe corresponding to the above-mentioned nth subframe There is no adjacent cell interference on the k RBs, and it is further determined that the process of blind detection of adjacent cell parameters is not performed on the kth RB corresponding to the above nth subframe.

Further, in a specific embodiment of the present invention, when the preset relative threshold value is 0.5, the fourth ratio is less than 0.5, that is, the ratio of the above-mentioned accumulated adjacent cell received power and the above-mentioned accumulated received power is less than 0.5, then it can be considered that the above The accumulated adjacent cell received power is much smaller than the above-mentioned accumulated received power, that is to say, the probability of interference is small, that is, there is no adjacent cell interference on the kth RB corresponding to the above nth subframe, and then it is determined that the above nth subframe corresponds to The process of blind detection of adjacent cell parameters is not performed on the kth RB of .

To sum up, in a specific embodiment of the present invention, through the above steps 205c-1 to 205c-3, the interference detection device can obtain a fourth ratio by performing a proportional operation on the accumulated adjacent cell received power and the accumulated received power, and The fourth ratio is compared with the preset relative threshold, and when the fourth ratio is smaller than the preset relative threshold, it can be determined that there is no adjacent cell interference on the kth RB corresponding to the nth subframe, so that by ending the neighbor cell parameter The blind detection operation reduces the signaling overhead of the blind detection process and effectively improves the efficiency of interference elimination.

Based on the methods of Embodiments 4 to 6, FIG. 8 is a comparison diagram of detecting the existence of adjacent cell interference and ideal detection performance using the present invention in NAICS mode. As shown in FIG. 8 , assuming an LTE-A TDD system, the transmission mode is TM4, and INR1=13.92dB, using the technical scheme proposed by the present invention, the simulation performance of the adjacent cell interference presence detection and the adjacent cell ideal interference detection are basically the same, so it can be considered that the interference detection method of the present invention has obvious effects. And by determining whether there is PDSCH interference of adjacent cells on the PRB, when there is no PDSCH interference of adjacent cells, the blind detection operation of adjacent cell parameters can be ended, and the blind detection operation of PRBs with PDSCH interference can be realized, thereby reducing the blind detection process. The signaling overhead is increased, and the efficiency of interference cancellation is effectively improved.

Embodiment 7

FIG. 9 is a schematic diagram 1 of the composition structure of an interference detection device proposed by an embodiment of the present invention. As shown in FIG. 9 , in a specific embodiment of the present invention, the interference detection device 1 includes an acquisition unit 11 , a calculation unit 12 , and a judgment unit 13, of which,

Obtaining unit 11 is used to obtain the received signal of each subcarrier in a resource module RB corresponding to the ith symbol; wherein, i is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe; and obtain the ith symbol a plurality of first received powers of all the corresponding RBs; and obtaining a neighboring cell received signal of each subcarrier from the received signal of each subcarrier on the ith symbol of one RB.

Calculation unit 12 is used to calculate the first received power of an RB on the ith symbol according to the received signal of each subcarrier; And according to a plurality of first received powers, calculate the full bandwidth average power on the ith symbol; And according to the adjacent cell received signal of each subcarrier, the adjacent cell received power of one RB on the ith symbol is calculated.

Judging unit 13, used for judging whether there is adjacent cell interference on the above-mentioned one RB according to the first received power, the average power of the full bandwidth, the adjacent cell received power and the preset power threshold, and then judge whether the above-mentioned one RB is performed on the adjacent cell parameter blind detection. process.

In a specific embodiment of the present invention, further, the above-mentioned preset power threshold includes a preset absolute threshold and a preset relative threshold.

Based on the above-mentioned FIG. 9 , FIG. 10 is a second schematic diagram of the composition and structure of an interference detection apparatus proposed by an embodiment of the present invention. As shown in FIG. 10 , in a specific embodiment of the present invention, the interference detection apparatus 1 further includes a blind detection unit 14 .

The calculation unit 12 is further configured to obtain a first ratio by performing a proportional operation on the first received power and the full-bandwidth average power.

The judgment unit 13 is specifically configured to judge that there is no adjacent cell interference on the above-mentioned one RB if the first ratio is less than or equal to a preset absolute threshold; and if the first ratio is greater than the preset absolute threshold, then according to the first received power, adjacent Based on the received power of the cell and the preset relative threshold, it is judged twice whether there is adjacent cell interference on the above-mentioned one RB, and then it is further judged whether the above-mentioned one RB is subjected to the blind detection process of adjacent cell parameters.

The blind detection unit 14 is configured to end the process of blind detection of parameters of adjacent cells when it is determined that there is no adjacent cell interference on the above-mentioned one RB.

In a specific embodiment of the present invention, further, the calculation unit 12 is further configured to obtain the second ratio by performing a proportional operation on the received power of the adjacent cell and the first received power.

The judgment unit 13 is specifically also used to judge that there is adjacent cell interference on the above-mentioned one RB if the second ratio is greater than or equal to a preset relative threshold; and if the second ratio is less than the preset relative threshold, then judge that the above-mentioned one RB does not exist. There is neighbor interference.

The blind detection unit 14 is further configured to perform a process of blind detection of parameters of adjacent cells on the above-mentioned one RB when it is determined that there is adjacent cell interference on the above-mentioned one RB.

In a specific embodiment of the present invention, further, the obtaining unit 11 is further configured to obtain the first received power corresponding to the i+x th symbol, the full bandwidth average power corresponding to the i+x th symbol, and the i+x th symbol The received power of adjacent cells corresponding to each symbol; wherein, i+x is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe, and x is a non-zero integer.

The calculation unit 12 is further configured to perform cumulative calculation on a plurality of first received powers corresponding to the i-th symbol and the i+x-th symbol of the above-mentioned one RB to obtain the cumulative received power of the above-mentioned one RB; Accumulate and calculate the multiple full-bandwidth average powers corresponding to the i+x-th symbol to obtain the accumulated full-bandwidth average power; calculate the received power of the above-mentioned one RB in multiple adjacent cells corresponding to the i-th symbol and the i+x-th symbol. Accumulated calculation is performed to obtain the accumulated received power of adjacent cells of the above-mentioned one RB.

The judgment unit 13 is used to judge whether there is adjacent cell interference on the above-mentioned one RB according to the accumulated received power, the accumulated full-bandwidth average power, the accumulated adjacent cell received power and the preset power threshold, and then judge whether the above-mentioned one RB carries out the adjacent cell parameter. Blind inspection process.

In a specific embodiment of the present invention, further, the preset power threshold includes a preset absolute threshold and a preset relative threshold.

As shown in FIG. 10 , in a specific embodiment of the present invention, the interference detection apparatus 1 further includes a blind detection unit 14 .

The calculation unit 12 is further configured to obtain a third ratio by performing a proportional operation on the accumulated received power and the accumulated full-bandwidth average power.

The judgment unit 13 is specifically further configured to judge that there is no adjacent cell interference on the above-mentioned one RB if the third ratio is less than or equal to the preset absolute threshold; and if the third ratio is greater than the preset absolute threshold, then according to the accumulated received power, accumulated The received power of the adjacent cell and the preset relative threshold are used to judge for a second time whether there is adjacent cell interference on the above-mentioned one RB, and then judge for the second time whether the above-mentioned one RB performs a blind detection process of adjacent cell parameters.

In a specific embodiment of the present invention, further, the calculation unit 12 is further configured to obtain a fourth ratio by performing a proportional operation on the accumulated adjacent cell received power and the accumulated received power.

The judgment unit 13 is specifically also used to judge that there is adjacent cell interference on the above-mentioned one RB if the fourth ratio is greater than or equal to a preset relative threshold; and if the fourth ratio is less than the preset relative threshold, then judge that the above-mentioned one RB is not There is neighbor interference.

The blind detection unit 14 is further configured to perform a process of blind detection of parameters of adjacent cells on the above-mentioned one RB when it is determined that there is adjacent cell interference on the above-mentioned one RB.

The acquisition unit 11, the calculation unit 12, the judgment unit 13, and the blind detection unit 14 provided in the embodiment of the present invention can all be implemented in the form of program codes by executing corresponding functions by the processor in the interference detection device; In the process of the specific embodiment, the processor may be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP) or a field programmable gate array (FPGA), etc., to obtain Unit 11 is implemented by a receiver, which may consist of filters, amplifiers, A/D converters, and the like. The above-mentioned interference detection device also includes: a memory, which can be a physical storage device, such as a memory stick, TF card, or a circuit with a storage function, such as a random access memory (RAM), FIFO storage, and the like.

An interference detection device provided by the present invention obtains the received signal of each subcarrier in a resource module RB corresponding to the i-th symbol, and calculates the first RB on the i-th symbol according to the received signal of each sub-carrier. a received power; wherein, i is a natural number greater than or equal to 0 and less than the number of occupied symbols in a subframe; obtain multiple first received powers of all RBs corresponding to the i-th symbol, and calculate according to the multiple first received powers The full-bandwidth average power on the ith symbol; the received signal of each subcarrier's neighboring area is obtained from the received signal of each subcarrier on the ith symbol of the above-mentioned one RB, and according to the received signal of the neighboring area of each subcarrier, Calculate the adjacent cell received power of the above-mentioned one RB on the ith symbol; according to the above-mentioned first received power, the above-mentioned full-bandwidth average power, the above-mentioned adjacent cell received power and the preset power threshold, judge whether there is adjacent cell interference on the above-mentioned one RB , and then it is judged whether the process of blind detection of adjacent cell parameters is performed on the above-mentioned one RB. It can be seen that the interference detection apparatus proposed in the embodiment of the present invention can perform a blind detection operation of adjacent cell parameters for PRBs with PDSCH interference by determining whether there is PDSCH interference of adjacent cells on the PRB, thereby reducing blind detection. The signaling overhead of the process is effectively improved, and the efficiency of interference elimination is effectively improved; in addition, it is simple and convenient to implement, easy to popularize, and has a wider application range.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (8)

1. An interference detection method, the method comprising:

acquiring a received signal of each subcarrier in a resource module RB corresponding to an ith symbol, and calculating first received power of the RB on the ith symbol according to the received signal of each subcarrier; wherein i is a natural number which is more than or equal to 0 and less than the number of occupied symbols in one subframe;

obtaining a plurality of first receiving powers of all RBs corresponding to an ith symbol, and calculating full-bandwidth average power on the ith symbol according to the plurality of first receiving powers;

acquiring a neighbor cell receiving signal of each subcarrier of the RB on the ith symbol, and calculating neighbor cell receiving power of the RB on the ith symbol according to the neighbor cell receiving signal of each subcarrier;

judging whether adjacent cell interference exists on the RB according to the first receiving power, the full-bandwidth average power, the adjacent cell receiving power and a preset power threshold, and further judging whether an adjacent cell parameter blind detection process is carried out on the RB; the preset power threshold includes a preset absolute threshold and a preset relative threshold, and the method determines whether there is neighboring cell interference on the RB according to the first received power, the full-bandwidth average power, the neighboring cell received power, and the preset power threshold, and further determines whether to perform a neighboring cell parameter blind detection process on the RB, including:

obtaining a first ratio by performing proportional operation on the first received power and the full-bandwidth average power;

if the first ratio is less than or equal to the preset absolute threshold, judging that the adjacent cell interference does not exist on the RB, and further judging that the adjacent cell parameter blind detection process is not carried out on the RB;

if the first ratio is larger than the preset absolute threshold, secondarily judging whether the adjacent cell interference exists on the RB according to the first receiving power, the adjacent cell receiving power and the preset relative threshold, and further secondarily judging whether the adjacent cell parameter blind detection process is carried out on the RB.

2. The method of claim 1, wherein the secondarily determining whether the neighboring cell interference exists on the RB according to the first received power, the neighboring cell received power, and the preset relative threshold, and further secondarily determining whether the neighboring cell parameter blind detection procedure is performed on the RB comprises:

obtaining a second ratio by performing proportional operation on the receiving power of the neighboring cell and the first receiving power;

if the second ratio is greater than or equal to the preset relative threshold, judging that the adjacent cell interference exists on the RB, and further judging that the adjacent cell parameter blind detection process is carried out on the RB;

and if the second ratio is smaller than the preset relative threshold, judging that the adjacent cell interference does not exist on the RB, and further judging that the adjacent cell parameter blind detection process is not performed on the RB.

3. The method of claim 1, further comprising:

acquiring first receiving power corresponding to the (i + x) th symbol, full-bandwidth average power corresponding to the (i + x) th symbol and adjacent receiving power corresponding to the (i + x) th symbol; wherein i + x is a natural number which is more than or equal to 0 and less than the number of occupied symbols in a subframe, and x is a non-0 integer;

performing accumulation calculation on a plurality of first received powers corresponding to the ith symbol and the (i + x) th symbol of the RB to obtain the accumulated received power of the RB;

accumulating and calculating a plurality of full-bandwidth average powers corresponding to the ith symbol and the (i + x) th symbol to obtain an accumulated full-bandwidth average power;

performing accumulation calculation on a plurality of adjacent cell received powers corresponding to the ith symbol and the (i + x) th symbol of the RB to obtain the accumulated adjacent cell received power of the RB;

judging whether adjacent cell interference exists on the RB according to the accumulated received power, the accumulated full-bandwidth average power, the accumulated adjacent cell received power and the preset power threshold, and further judging whether an adjacent cell parameter blind detection process is carried out on the RB; the preset power threshold includes a preset absolute threshold and a preset relative threshold, and the method determines whether there is neighboring cell interference on the RB according to the accumulated received power, the accumulated full-bandwidth average power, the accumulated neighboring cell received power, and the preset power threshold, and further determines whether to perform a neighboring cell parameter blind detection process on the RB, including:

obtaining a third ratio by performing proportional operation on the accumulated received power and the accumulated full-bandwidth average power;

if the third ratio is less than or equal to the preset absolute threshold, judging that the adjacent cell interference does not exist on the RB, and further judging that the adjacent cell parameter blind detection process is not performed on the RB;

if the third ratio is greater than the preset absolute threshold, secondarily judging whether the adjacent cell interference exists on the RB according to the accumulated received power, the accumulated adjacent cell received power and the preset relative threshold, and further secondarily judging whether the adjacent cell parameter blind detection process is performed on the RB.

4. The method of claim 3, wherein the secondarily determining whether the neighboring cell interference exists on the RB according to the accumulated received power, the accumulated neighboring cell received power, and the preset relative threshold, and further secondarily determining whether the neighboring cell parameter blind detection procedure is performed on the RB comprises:

obtaining a fourth ratio by performing proportional operation on the accumulated neighboring cell received power and the accumulated received power;

if the fourth ratio is greater than or equal to the preset relative threshold, judging that the adjacent cell interference exists on the RB, and further judging that the adjacent cell parameter blind detection process is performed on the RB;

and if the fourth ratio is smaller than the preset relative threshold, judging that the adjacent cell interference does not exist on the RB, and further judging that the adjacent cell parameter blind detection process is not performed on the RB.

5. An interference detection device is characterized in that the device comprises an acquisition unit, a calculation unit and a judgment unit,

the acquiring unit is configured to acquire a received signal of each subcarrier in one resource block RB corresponding to an ith symbol; wherein i is a natural number which is more than or equal to 0 and less than the number of occupied symbols in one subframe; acquiring a plurality of first receiving powers of all RBs corresponding to the ith symbol; and obtaining a neighbor cell receiving signal of each subcarrier on the ith symbol from a receiving signal of each subcarrier of the RB;

the calculating unit is configured to calculate a first received power of the RB on the ith symbol according to the received signal of each subcarrier; and calculating a full bandwidth average power over the ith symbol based on the plurality of first received powers; and according to the adjacent region receiving signal of each subcarrier, calculating the adjacent region receiving power of the RB on the ith symbol;

the judging unit is configured to judge whether there is neighboring cell interference on the RB according to the first received power, the full-bandwidth average power, the neighboring cell received power, and a preset power threshold, and further judge whether to perform a neighboring cell parameter blind detection procedure on the RB; the preset power threshold comprises a preset absolute threshold and a preset relative threshold, the interference detection device also comprises a blind detection unit,

the calculating unit is further configured to obtain a first ratio by performing proportional operation on the first received power and the full-bandwidth average power;

the determining unit is specifically configured to determine that the neighboring cell interference does not exist on the RB if the first ratio is less than or equal to the preset absolute threshold; if the first ratio is larger than the preset absolute threshold, secondarily judging whether the adjacent cell interference exists on the RB according to the first receiving power, the adjacent cell receiving power and the preset relative threshold, and further secondarily judging whether the adjacent cell parameter blind detection process is carried out on the RB;

and the blind detection unit is used for ending the adjacent region parameter blind detection process when judging that the adjacent region interference does not exist on the RB.

6. The apparatus of claim 5,

the calculating unit is further configured to obtain a second ratio by performing proportional operation on the neighboring cell received power and the first received power;

the determining unit is further configured to determine that the neighboring cell interference exists on the RB if the second ratio is greater than or equal to the preset relative threshold; and if the second ratio is smaller than the preset relative threshold, judging that the adjacent cell interference does not exist on the RB;

and the blind detection unit is further configured to perform the blind detection process of the neighboring cell parameters on the RB when it is determined that the neighboring cell interference exists on the RB.

7. The apparatus of claim 5,

the obtaining unit is further configured to obtain, after calculating a first received power of the RB on the ith symbol according to the received signal of each subcarrier, a first received power corresponding to an i + x th symbol, a full-bandwidth average power corresponding to an i + x th symbol, and a neighboring received power corresponding to an i + x th symbol; wherein i + x is a natural number which is more than or equal to 0 and less than the number of occupied symbols in a subframe, and x is a non-0 integer;

the calculation unit is further configured to perform cumulative calculation on a plurality of first received powers corresponding to the ith symbol and the (i + x) th symbol of the RB to obtain a cumulative received power of the RB; accumulating and calculating a plurality of full-bandwidth average powers corresponding to the ith symbol and the (i + x) th symbol to obtain an accumulated full-bandwidth average power; performing accumulation calculation on a plurality of adjacent cell received powers corresponding to the ith symbol and the (i + x) th symbol of the RB to obtain the accumulated adjacent cell received power of the RB;

the judging unit is configured to judge whether there is neighboring cell interference on the RB according to the accumulated received power, the accumulated full-bandwidth average power, the accumulated neighboring cell received power, and the preset power threshold, and further judge whether to perform a neighboring cell parameter blind detection procedure on the RB; the preset power threshold comprises a preset absolute threshold and a preset relative threshold, the interference detection device also comprises a blind detection unit,

the calculating unit is further configured to obtain a third ratio by performing proportional operation on the accumulated received power and the accumulated full-bandwidth average power;

the determining unit is further configured to determine that the neighboring cell interference does not exist on the RB if the third ratio is less than or equal to the preset absolute threshold; if the third ratio is greater than the preset absolute threshold, secondarily judging whether the adjacent cell interference exists on the RB according to the accumulated receiving power, the accumulated adjacent cell receiving power and the preset relative threshold, and further secondarily judging whether the adjacent cell parameter blind detection process is carried out on the RB;

and the blind detection unit is used for not performing the neighbor cell parameter blind detection process on the RB when the neighbor cell interference does not exist on the RB.

8. The apparatus of claim 7,

the calculating unit is further configured to obtain a fourth ratio by performing proportional operation on the accumulated neighboring cell received power and the accumulated received power;

the determining unit is further configured to determine that the neighboring cell interference exists on the RB if the fourth ratio is greater than or equal to the preset relative threshold; and if the fourth ratio is smaller than the preset relative threshold, judging that the adjacent cell interference does not exist on the RB;

and the blind detection unit is further configured to perform the blind detection process of the neighboring cell parameters on the RB when it is determined that the neighboring cell interference exists on the RB.

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