CN108667472B

CN108667472B - Interference detection method and device

Info

Publication number: CN108667472B
Application number: CN201710187293.2A
Authority: CN
Inventors: 赵丽娟; 张骏凌
Original assignee: Sanechips Technology Co Ltd
Current assignee: Sanechips Technology Co Ltd
Priority date: 2017-03-27
Filing date: 2017-03-27
Publication date: 2020-06-30
Anticipated expiration: 2037-03-27
Also published as: CN108667472A

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

Interference detection method and device

Technical Field

The present invention relates to detection technologies in the field of communications, and in particular, to an interference detection method and apparatus.

Background

As the demand of mobile communication users is increasing, high spectral efficiency is becoming one of the main requirements of mobile communication systems, and in order to meet the demand, a Long Term Evolution system (LTE-a) Advanced by the third Generation partnership project (3 GPP) is expected to provide more flexible spectrum management by utilizing spectral efficiency. Such as carrier aggregation/heterogeneous networks, etc. The spectrum management flexibility can be improved by adopting a basic means of compact frequency reuse, so that the spectrum efficiency of a multi-cell network can be improved, but the method can cause strong inter-cell interference at the edge of a cell and cause serious performance reduction. In order to cancel interference, in the prior art, performance of cell edge User Equipments (UEs) is improved by Network Assisted Interference Cancellation and Suppression (NAICS).

In the process of cancelling data of an Interference source by explicit demodulation by the NAICS receiver, the UE needs to acquire parameter information of a main Interference Physical Downlink Shared Channel (PDSCH), so as to perform further Interference Cancellation (IC) or Interference Suppression (IS), that IS, for a transmission mode based on a Cell-specific reference signal (CRS), blind detection IS also needed for other Interference parameters, such as a transmission mode, a Precoding Matrix Indicator (PMI), a number of layers (RI), a modulation scheme, a power compensation factor, and the like.

In the prior art, for a transmission mode based on a cell-specific reference signal CRS, since CRS and PDSCH are not transmitted in a bundled manner, it is impossible to determine whether PDSCH interference exists on PRB by detecting CRS in a detection process for interference based on the CRS transmission mode, and therefore, blind detection needs to be performed on all interference parameters without determining whether PDSCH interference exists on PRB, thereby increasing signaling overhead of a blind detection procedure and causing a defect of reducing interference cancellation efficiency.

Disclosure of Invention

The embodiment of the invention provides an interference detection method and device, which can realize the blind detection operation of adjacent cell parameters aiming at PRBs (physical resource blocks) with PDSCH interference by determining whether the PRBs have the PDSCH interference of the adjacent cells, thereby reducing the signaling overhead of a blind detection process and effectively improving the interference elimination efficiency.

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

the embodiment of the invention provides an interference detection method, which comprises the following steps:

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;

and judging whether the 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.

In the foregoing solution, the determining 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 then determining whether to perform a neighboring cell parameter blind detection procedure on the RB includes:

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.

In the foregoing solution, the second determining, according to the first received power, the neighboring cell received power, and the preset relative threshold, whether the neighboring cell interference exists on the RB, and then determining whether the neighboring cell parameter blind detection procedure is performed on the RB at the second time includes:

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.

In the above scheme, after the calculating the first received power of the RB on the ith symbol according to the received signal of each subcarrier, the method further includes:

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;

and judging whether the adjacent cell interference exists on the RB according to the accumulated receiving power, the accumulated full-bandwidth average power, the accumulated adjacent cell receiving power and the preset power threshold, and further judging whether the adjacent cell parameter blind detection process is carried out on the RB.

In the foregoing solution, the determining 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 determining whether to perform a neighboring cell parameter blind detection procedure on the RB includes:

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.

In the foregoing solution, the second determining, according to the accumulated received power, the accumulated neighboring cell received power, and the preset relative threshold, whether the neighboring cell interference exists on the RB, and then determining whether the neighboring cell parameter blind detection procedure is performed on the RB at the second time includes:

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.

The embodiment of the invention provides an interference detection device which is characterized by comprising 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;

and the judging unit is used for judging whether the 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 the adjacent cell parameter blind detection process is carried out on the RB.

In the above scheme, the preset power threshold includes a preset absolute threshold and a preset relative threshold, the interference detection apparatus further includes 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.

In the foregoing solution, 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.

In the foregoing solution, the obtaining unit is further configured to obtain, after calculating the first received power of the RB on the ith symbol according to the received signal of each subcarrier, 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 neighboring received 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;

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;

and the judging unit is used for judging whether the 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 the adjacent cell parameter blind detection process is carried out on the RB.

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;

In the foregoing solution, the calculating unit is further configured to perform proportional operation on the accumulated neighboring cell received power and the accumulated received power to obtain a fourth ratio;

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;

In the technical scheme of the embodiment of the invention, a received signal of each subcarrier in a resource module RB corresponding to the ith symbol is obtained, and the first received power of the RB on the ith symbol is calculated 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 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 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; and judging whether the 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 the adjacent cell parameter blind detection process is carried out on the RB. Therefore, according to the interference detection method and device provided by the embodiment of the invention, before the interference parameters are subjected to blind detection, whether the interference of the PDSCH of the adjacent cell exists on the PRB can be determined, when the interference of the PDSCH of the adjacent cell does not exist, the blind detection operation can be finished, and the blind detection operation aiming at the PRB with the interference of the PDSCH is realized, so that the signaling overhead of a blind detection process is reduced, and the interference elimination efficiency is effectively improved; moreover, the method is simple and convenient to realize, convenient to popularize and wide in application range.

Drawings

FIG. 1 is a flow chart of interference cancellation in a NAICS receiver;

fig. 2 is a first schematic flow chart illustrating an implementation of an interference detection method according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an implementation flow of an interference detection method according to an embodiment of the present invention;

fig. 4 is a schematic flow chart illustrating an implementation of an interference detection method according to an embodiment of the present invention;

fig. 5 is a schematic flow chart illustrating an implementation of an interference detection method according to an embodiment of the present invention;

fig. 6 is a schematic flow chart illustrating an implementation of an interference detection method according to an embodiment of the present invention;

fig. 7 is a schematic flow chart illustrating an implementation of an interference detection method according to an embodiment of the present invention;

FIG. 8 is a comparison chart of the detection of the existence of interference in neighboring cells and the ideal detection performance in NAICS mode according to the present invention;

fig. 9 is a first schematic structural diagram of an interference detection apparatus according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a second interference detection apparatus according to an embodiment of the present invention.

Detailed Description

The technical solution 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 neighbor to the serving cell, assuming that the neighbor 1 is a strong interference cell and the neighbor 2 is a weak interference cell, the parameter blind detection needs to be performed on the neighbor 1, and fig. 1 is a flow chart of interference elimination in the NAICS receiver. As shown in fig. 1, a receiving end receives a signal, and after processing the signal by Radio Frequency (RF) and Fast Fourier Transform (FFT), obtains a received signal Y (i, m) on an mth subcarrier of an ith Orthogonal Frequency Division Multiplexing (OFDM) symbol, and after estimating a serving cell signal, reconstructs a neighboring cell signal on the mth subcarrier of the ith OFDM symbol by removing a transmitted signal X (i, m) of the serving cell, which is denoted as Y_NC(i, m), the NAICS receiver mainly performs parameter blind detection on the neighbor 1, so that residual noise whitening processing needs to be performed on the neighbor 2 signal and noise, and the whitened neighbor received signal is marked as Y_NC1(i, m), finally, the whitened received signal Y (i, m) of the neighboring cell is processed according to the received signal Y_NC1And (i, m) carrying out signal reconstruction and elimination of the main interference cell, and carrying out Multiple-Input Multiple-Output (MIMO) detection.

It should be noted that, in the embodiment of the present invention, when the NAICS receiver eliminates the interference of the strong neighbor to the serving cell, the received signal Y (i, m) on the mth subcarrier of the ith OFDM symbol and the neighbor received signal Y with the neighbor 2 signal and noise whitened are obtained_NC1(i, m) based on the detected PDSCH interference.

Example one

Fig. 2 is a first schematic flow chart illustrating an implementation of an interference detection method according to an embodiment of the present invention, and as shown in fig. 2, in a specific embodiment of the present invention, a method for detecting PDSCH interference in a neighboring cell mainly includes the following steps:

step 101, obtaining a received signal of each subcarrier in a resource module RB corresponding to an ith symbol, and calculating a 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 greater than or equal to 0 and less than the number of occupied symbols in one subframe.

In an embodiment of the present invention, the apparatus obtains a received signal of each subcarrier of one resource block RB corresponding to an ith symbol, and then calculates a first received power of the one RB on the ith symbol according to the received signal of each subcarrier of the one resource block RB.

Further, in an embodiment of the present invention, the symbol may be an OFDM symbol, and the resource block RB includes a plurality of subcarriers, for example, one RB includes 12 subcarriers.

Further, in an embodiment of the present invention, i represents a position of an OFDM symbol in a subframe, for example, if a subframe includes 14 symbols, the ith symbol is any one of 0 to 13 symbols. Preferably, in the embodiment of the present invention, the ith symbol should be selected to have a symbol position that does not include a pilot.

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

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

In the formula (1), the first and second groups,

the number of subcarriers occupied in the frequency domain for each RB.

And 102, acquiring 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.

In an embodiment of the present invention, after obtaining the first received power of the RB through calculation, the apparatus may obtain a plurality of first received powers of all RBs corresponding to the ith symbol, and then calculate the full-bandwidth average power corresponding to the ith symbol according to the plurality of first received powers.

Further, in the embodiment of the present invention, the first received power P of the received signal on the k RB of the ith OFDM symbol is calculated_YAfter (i, k), the apparatus may calculate and obtain the full bandwidth average power corresponding to the ith symbol according to equation (2)

The following were used:

where { A } is the set of RBs allocated by the serving cell, K is the number of RBs allocated,

is the downlink transmission bandwidth.

Further, in the embodiment of the present invention, the first received power P for the signal received on the kth RB of the ith OFDM symbol is used_Y(i, k), calculating according to the above formula (2), so as to obtain the full bandwidth average power corresponding to the ith symbol.

Step 103, obtaining the neighbor cell receiving signal of each subcarrier from the receiving signal of each subcarrier of an RB on the ith symbol, and calculating the neighbor cell receiving power of the RB on the ith symbol according to the neighbor cell receiving signal of each subcarrier.

In a specific embodiment of the present invention, after obtaining the received signal of each subcarrier in one resource block RB corresponding to the ith symbol, the apparatus may obtain the neighboring cell received signal of each subcarrier from the received signal of each subcarrier, and calculate the neighboring cell received power of the above-mentioned one RB on the ith symbol according to the neighboring cell received signal of each subcarrier.

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

Further, in an embodiment of the present invention, the received signal Y (i, m) of each subcarrier is whitened to remove the signal and noise of the weak interfering cell, so as to obtain a whitened signal of each subcarrier, that is, a neighboring cell received signal Y of each subcarrier_NC1(i,m)。

Further, in an embodiment of the present invention, the apparatus may perform calculation according to formula (3) to obtain the neighboring cell received power of the kth RB of the ith symbol

The following were used:

further, in the embodiment of the present invention, the signal Y is received through the neighboring cell of each subcarrier in an RB corresponding to the ith OFDM symbol_NC1(i, m), the adjacent receiving power of an RB corresponding to the ith symbol can be obtained by performing calculation according to the above formula (3).

And step 104, judging whether the 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 the adjacent cell parameter blind detection process is carried out on the RB.

In the present inventionIn an embodiment of the invention, the apparatus obtains the first received power P of one RB of the ith OFDM symbol_Y(i, k), full bandwidth average power corresponding to ith symbol

Adjacent region receiving power of an RB corresponding to the ith symbol

And then, judging whether the 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 the adjacent cell parameter blind detection process is carried out on the RB.

Further, in an embodiment of the present invention, the preset power threshold may include a preset absolute threshold and a preset relative threshold, where values of the preset absolute threshold and the preset relative threshold may be configured, and preferably, in the embodiment of the present invention, the preset absolute threshold is set to be 0.25, and the preset relative threshold is set to be 0.5.

Further, in an embodiment of the present invention, when the first received power is much smaller than the full-bandwidth average power, the probability of interference existing on the RB is considered to be low, that is, the PDSCH interference of the neighboring cell does not exist on the RB.

Further, in an embodiment of the present invention, when the first received power does not satisfy the condition that the first received power is much smaller than the full-bandwidth average power, the apparatus may determine whether there is PDSCH interference of the neighboring cell on the RB according to a relative magnitude relationship between the first received power and the neighboring cell received power.

In a specific embodiment of the present invention, after determining 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, if it is determined that there is no neighboring cell interference on the RB, the apparatus ends the blind neighboring cell parameter detection procedure on the RB.

Further, in an embodiment of the present invention, if there is no PDSCH interference of a neighboring cell on the RB, the apparatus does not need to perform blind detection on parameters such as the transmission mode, the precoding matrix indicator, the number of layers, the modulation mode, and the power compensation factor on the RB.

Further, in the embodiment of the present invention, if the determination result indicates that there is PDSCH interference of the neighboring cell on the RB, the apparatus may continue to perform blind detection on parameters such as the transmission mode, the precoding matrix indicator, the number of layers, the modulation mode, and the power compensation factor on the RB.

The interference detection method provided by the embodiment of the invention obtains the received signal of each subcarrier in a resource module RB corresponding to the ith symbol, and calculates the 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 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 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; and judging whether the 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 the adjacent cell parameter blind detection process is carried out on the RB. Therefore, the interference detection method provided by the embodiment of the invention can realize the blind detection operation of the parameters of the adjacent cell aiming at the PRB with the PDSCH interference by determining whether the PRB has the PDSCH interference of the adjacent cell, thereby reducing the signaling overhead of the blind detection process and effectively improving the efficiency of interference elimination; moreover, the method is simple and convenient to realize, convenient to popularize and wide in application range.

Example two

Based on the first embodiment, fig. 3 is a schematic diagram of a second implementation flow of the interference detection method according to the second embodiment of the present invention, as shown in fig. 3, in the specific embodiment of the present invention, the method for determining whether there is neighboring cell interference on the RB, and further determining whether to perform a blind neighboring cell parameter detection flow on the RB mainly includes the following steps:

and 104a, obtaining a first ratio by performing proportional operation on the first received power and the full-bandwidth average power.

In a specific embodiment of the present invention, the apparatus obtains the first received power P of one RB for the ith OFDM symbol_Y(i, k), full bandwidth average power corresponding to ith symbol

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

And step 104b, if the first ratio is less than or equal to a preset absolute threshold, judging that no adjacent region interference exists on the RB, and further judging that no adjacent region parameter blind detection process is performed on the RB.

In a specific embodiment of the present invention, the apparatus performs a proportional operation on the first received power and the full-bandwidth average power to obtain a first ratio, and then compares the first ratio with a preset absolute threshold, and when the first ratio is less than or equal to the preset absolute threshold, it may be determined that there is no neighboring cell interference on the RB, and further determines that the blind neighboring cell parameter detection procedure is not performed on the RB.

Further, in an embodiment of the present invention, when the preset absolute threshold is 0.25, the first ratio is smaller than 0.25, that is, the ratio of the first received power to the full-bandwidth average power is smaller than 0.25, it may be considered that the first received power is far smaller than the full-bandwidth average power, that is, the probability of generating interference is small, that is, there is no neighboring interference on the RB.

And step 104c, if the first ratio is greater 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.

In a specific embodiment of the present invention, after obtaining the first ratio, the apparatus compares the first ratio with a preset absolute threshold, and when the first ratio is greater than the preset absolute threshold, secondarily determines whether there is neighboring cell interference on the RB according to the first receiving power, the neighboring cell receiving power, and a preset relative threshold, and further secondarily determines whether to perform a neighboring cell parameter blind detection procedure on the RB.

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 the adjacent cell interference exists on the RB, and the device needs to perform a second determination according to the first received power, the adjacent cell received power, and the preset relative threshold, so as to determine whether the adjacent cell interference exists on the RB, and further determine whether the adjacent cell parameter blind detection procedure is performed on the RB twice.

In summary, in the specific embodiment of the present invention, through the steps 104a to 104c, the interference detection apparatus may obtain the first ratio by performing proportional operation on the first received power and the full-bandwidth average power, compare the first ratio with the preset absolute threshold, and when the first ratio is less than or equal to the preset absolute threshold, determine that there is no neighboring cell interference on the RB, thereby reducing signaling overhead of the blind detection process by ending the blind detection operation of the neighboring cell parameter, and effectively improving the efficiency of interference cancellation.

EXAMPLE III

Based on the second embodiment, fig. 4 is a schematic flow chart illustrating an implementation of the interference detection method according to the second embodiment of the present invention, and as shown in fig. 4, in a specific embodiment of the present invention, the method for determining whether there is neighboring cell interference on the RB further includes the following steps:

and step 104c-1, obtaining a second ratio by performing proportional operation on the adjacent region received power and the first received power.

In a specific embodiment of the present invention, when the first ratio is greater than a preset absolute threshold, the apparatus needs to receive power of an adjacent cell of an RB corresponding to the ith symbol

And a first received power P of one RB of the ith OFDM symbol_Y(i, k) performing a proportional operation to obtain a second ratio.

And step 104c-2, if the second ratio is greater than or equal to a 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.

In a specific embodiment of the present invention, the apparatus performs a proportional operation on the received power of the neighboring cell and the first received power to obtain a second ratio, and then compares the second ratio with a preset relative threshold, and when the second ratio is greater than or equal to the preset relative threshold, it may be determined that neighboring cell interference exists on the one RB, so as to determine that a blind detection procedure of the neighboring cell parameter is performed on the one RB.

And step 104c-3, if the second ratio is smaller than the preset relative threshold, judging that no adjacent cell interference exists on the RB, and further judging that no adjacent cell parameter blind detection process is performed on the RB.

In a specific embodiment of the present invention, after obtaining the second ratio, the apparatus compares the second ratio with a preset relative threshold, and when the second ratio is smaller than the preset relative threshold, it may be determined that there is no neighboring cell interference on the RB, and further determines that the blind neighboring cell parameter detection procedure is not performed on the RB.

Further, in a specific embodiment of the present invention, when the preset relative threshold value is 0.5, the second ratio is smaller than 0.5, that is, the ratio of the receiving power of the neighboring cell to the first receiving power is smaller than 0.5, it may be determined that the receiving power of the neighboring cell is much smaller than the first receiving power, that is, the probability of generating interference is small, that is, there is no neighboring cell interference on the RB, and it is determined that the blind detection process of the neighboring cell parameter is not performed on the RB.

In summary, in the specific embodiment of the present invention, through the steps 104c-1 to 104c-3, the interference detection apparatus may obtain the second ratio by performing proportional operation on the received power of the neighboring cell and the first received power, compare the second ratio with the preset relative threshold, and when the second ratio is smaller than the preset relative threshold, determine that there is no neighboring cell interference on the RB, thereby reducing signaling overhead of the blind detection procedure by ending the blind detection operation of the neighboring cell parameter, and effectively improving the efficiency of interference cancellation.

Example four

Based on the first embodiment, fig. 5 is a schematic flow chart of a fourth implementation of the interference detection method according to the first embodiment of the present invention, as shown in fig. 5, in a specific embodiment of the present invention, after calculating a first received power of an RB on an ith symbol according to a received signal of each subcarrier, the method for detecting PDSCH interference in a neighboring cell further includes the following steps:

step 201, obtaining a first receiving power corresponding to an i + x th symbol, a full bandwidth average power corresponding to the i + x th symbol, and a neighboring receiving power corresponding to the i + x th symbol; wherein i + x is a natural number which is greater than or equal to 0 and less than the number of occupied symbols in one subframe, and x is a non-0 integer.

In a specific embodiment of the present invention, the apparatus may obtain, according to the methods in steps 101 to 103, a first received power corresponding to the (i + x) th symbol, a full-bandwidth average power corresponding to the (i + x) th symbol, and a neighboring cell received power corresponding to the (i + x) th symbol; wherein i + x is a natural number which is greater than or equal to 0 and less than the number of occupied symbols in one subframe, and x is a non-0 integer.

Further, in an embodiment of the present invention, in order to improve accuracy of interference detection, the apparatus may calculate and obtain first received powers, full-bandwidth average powers, and neighboring received powers corresponding to a plurality of different symbols by using the methods in steps 101 to 103.

Further, in the embodiment of the present invention, i + x represents a position of an OFDM symbol in one subframe, and therefore i + x is a natural number greater than or equal to 0 and smaller than the number of occupied symbols in one subframe, and i + x is not equal to i, so x is a non-0 integer. For example, if a subframe includes 14 symbols, i + x is any one natural number from 0 to 13, for example, the ith symbol may be the 3rd symbol, and the i + x th symbol may be the 1 st symbol, or the 4 th symbol, or the 7 th symbol.

In the embodiment of the present invention, preferably, in order to increase the number of sample points to be calculated, the (i + x) th symbol should select a symbol position containing no pilot.

It should be noted that, in an embodiment of the present invention, the plurality of different symbols are all 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, the first received power, the full-bandwidth average power and the neighbor received power corresponding to the i-3 th symbol in the nth subframe, and the first received power, the full-bandwidth average power and the neighbor received power corresponding to the i +5 th symbol in the nth subframe may be obtained through calculation respectively. Preferably, in a specific embodiment of the present invention, at least 3 different symbols may be selected for calculation in the nth subframe.

Step 202, performing an 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 an accumulated received power of the RB.

In an embodiment of the present invention, after obtaining, through the calculation in the step 101, a plurality of first received powers of the RB corresponding to the ith symbol and the (i + x) th symbol, the apparatus may perform an accumulation calculation on the plurality of first received powers, so as to obtain an accumulated received power of the RB.

Further, in an embodiment of the present invention, if the nth subframe includes the nth subframeThe first received power of the k RB corresponding to the i OFDM symbols is P_Y(i, k), the accumulated received power P of the kth RB corresponding to the nth subframe can be calculated and obtained according to the formula (4)_Y(n, k) as follows:

wherein L represents that L OFDM symbols are selected in the nth subframe, namely the ith symbol and the (i + x) th symbol comprise i₀、i₁、…i_L-1。

Further, in an embodiment of the present invention, the accumulated received power may be obtained by performing an accumulation calculation on a plurality of first received powers corresponding to a plurality of symbols, such as the ith symbol, the (i-3) th symbol, and the (i + 5) th symbol.

Step 203, performing accumulation calculation on 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.

In an embodiment of the present invention, after obtaining a plurality of full-bandwidth average powers corresponding to the ith symbol and the (i + x) th symbol through the calculation in step 102, the apparatus may perform an accumulation calculation on the full-bandwidth average powers, so as to obtain an accumulated full-bandwidth average power.

Further, in an embodiment of the present invention, if the full bandwidth average power corresponding to the ith OFDM symbol in the nth subframe is equal to

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

The following were used:

further, in an embodiment of the present invention, the accumulated full-bandwidth average power may be obtained by performing an accumulation calculation on a plurality of full-bandwidth average powers corresponding to a plurality of symbols, such as the ith symbol, the (i-3) th symbol, and the (i + 5) th symbol.

And 204, 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.

In a specific embodiment of the present invention, after obtaining, through the calculation in step 103, a plurality of neighboring cell received powers corresponding to the ith symbol and the (i + x) th symbol of the RB, the apparatus may perform an accumulation calculation on the neighboring cell received powers, so as to obtain an accumulated neighboring cell received power of the RB.

Further, in the specific embodiment of the present invention, if the adjacent receiving power of the kth RB corresponding to the ith OFDM symbol in the nth subframe is set to be

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

The following were used:

further, in an embodiment of the present invention, the accumulated neighboring cell received power may be obtained by performing accumulated calculation on a plurality of neighboring cell received powers corresponding to a plurality of symbols, such as an ith symbol, an (i-3) th symbol, and an (i + 5) th symbol.

Step 205, judging whether the RB has neighboring cell interference according to the accumulated received power, the accumulated full-bandwidth average power, the accumulated neighboring cell received power, and a preset power threshold, and further judging whether a neighboring cell parameter blind detection process is performed on the RB.

In a specific embodiment of the present invention, the apparatus obtains the accumulation corresponding to the ith symbol and the (i + x) th symbolAfter the received power, the accumulated full-bandwidth average power and the accumulated neighboring cell received power are obtained, the received power P can be obtained according to the accumulated received power_Y(n, k), accumulated full bandwidth average power

Accumulating neighbor received power

And judging whether the adjacent cell interference exists on the RB or not by a preset power threshold, and further judging whether the adjacent cell parameter blind detection process is carried out on the RB or not.

Further, in the specific embodiment of the present invention, the apparatus 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, so as to improve the accuracy of interference detection.

Further, the preset power threshold may include a preset absolute threshold and a preset relative threshold, where values of the preset absolute threshold and the preset relative threshold may be configured, and preferably, in the specific embodiment of the present invention, the preset absolute threshold is set to be 0.25, and the preset relative threshold is set to be 0.5.

The interference detection method provided by the embodiment of the invention obtains 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 area received 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; and judging whether the 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 a preset power threshold, and further judging whether the adjacent cell parameter blind detection process is carried out on the RB, so that the accuracy of the interference detection result is improved.

EXAMPLE five

Based on the fourth embodiment, fig. 6 is a schematic flow chart of a fifth implementation of the interference detection method provided in the embodiment of the present invention, as shown in fig. 6, in a specific embodiment of the present invention, the method for determining whether there is neighboring cell interference on the RB mainly includes the following steps:

step 205a, a third ratio is obtained by performing a proportional operation on the accumulated received power and the accumulated full-bandwidth average power.

In an embodiment of the present invention, the apparatus obtains the accumulated received power P of the kth RB corresponding to the nth subframe_Y(n, k), accumulated full bandwidth average power corresponding to nth sub-frame

Then, a proportional operation may be performed on the accumulated received power and the 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, determining that no neighboring cell interference exists on the RB, and further determining that no neighboring cell parameter blind detection procedure is performed on the RB.

In a specific embodiment of the present invention, the apparatus performs a proportional operation on the accumulated received power and the accumulated full-bandwidth average power to obtain a third ratio, and then compares the third ratio with a preset absolute threshold, and when the third ratio is less than or equal to the preset absolute threshold, it may be determined that no neighboring cell interference exists on a kth RB corresponding to the nth subframe, so as to determine that no neighboring cell parameter blind detection procedure is performed on the kth RB corresponding to the nth subframe.

Further, in an embodiment of the present invention, when the preset absolute threshold is 0.25, a third ratio is smaller than 0.25, that is, a ratio of the accumulated received power to the accumulated full-bandwidth average power is smaller than 0.25, it may be determined that the accumulated received power is much smaller than the accumulated full-bandwidth average power, that is, a probability of interference generated on a kth RB corresponding to the nth subframe is smaller, that is, no neighboring cell interference exists on the kth RB corresponding to the nth subframe.

Step 205c, if the third ratio is greater than the preset absolute threshold, secondarily determining whether the RB has neighboring cell interference according to the accumulated received power, the accumulated neighboring cell received power, and the preset relative threshold, and further secondarily determining whether the RB is subjected to a neighboring cell parameter blind detection process.

In a specific embodiment of the present invention, after obtaining the third ratio, the apparatus compares the third ratio with a preset absolute threshold, and when the third ratio is greater than the preset absolute threshold, determines whether there is neighboring cell interference on a kth RB corresponding to the nth subframe according to the accumulated received power, the accumulated neighboring cell received power, and a preset relative threshold, and further determines whether a neighboring cell parameter blind detection procedure is performed on the kth RB corresponding to the nth subframe twice.

Further, in a specific embodiment of the present invention, when the third ratio is greater than a preset absolute threshold, it cannot be determined whether there is neighboring cell interference on a kth RB corresponding to the nth subframe, and the device needs to perform a second determination according to the accumulated received power, the accumulated neighboring cell received power, and the preset relative threshold, so as to determine whether there is neighboring cell interference on the kth RB corresponding to the nth subframe, and further determine whether a neighboring cell parameter blind detection process is performed on the kth RB corresponding to the nth subframe.

In summary, in the specific embodiment of the present invention, through the steps 205a to 205c, the interference detection apparatus may obtain a third ratio by performing proportional operation on the accumulated received power and the accumulated full-bandwidth average power, and compare the third ratio with a preset absolute threshold, when the third ratio is less than or equal to the preset absolute threshold, it may be determined that no neighboring cell interference exists on the kth RB corresponding to the nth subframe, so as to reduce signaling overhead of the blind detection procedure and effectively improve the efficiency of interference cancellation by ending the blind detection operation of the neighboring cell parameters.

EXAMPLE six

Based on the fifth embodiment, fig. 7 is a sixth schematic flow chart illustrating an implementation process of the interference detection method according to the fifth embodiment of the present invention, as shown in fig. 7, in a specific embodiment of the present invention, the method for determining whether there is neighboring cell interference on the RB further includes the following steps:

step 205c-1, a fourth ratio is obtained by performing a proportional operation on the accumulated neighboring cell received power and the accumulated received power.

In an embodiment of the present invention, when the third ratio is greater than a preset absolute threshold, the apparatus needs to accumulate the adjacent cell received power of the kth RB corresponding to the nth subframe

Accumulated received power P of the k RB corresponding to the n-th subframe_Y(n, k) performing a proportional operation to obtain a fourth ratio.

And step 205c-2, if the fourth ratio is greater than or equal to the preset relative threshold, determining that the adjacent cell interference exists on the RB, and further determining that the adjacent cell parameter blind detection process is performed on the RB.

In a specific embodiment of the present invention, the apparatus performs a proportional operation on the accumulated neighboring cell received power and the 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 the preset relative threshold, it may be determined that neighboring cell interference exists on a kth RB corresponding to the nth subframe, and further determines that a blind neighboring cell parameter detection process is performed on the kth RB corresponding to the nth subframe.

And step 205c-3, if the fourth ratio is smaller than the preset relative threshold, determining that no adjacent cell interference exists on the RB, and further determining that no adjacent cell parameter blind detection process is performed on the RB.

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 smaller than the preset relative threshold, it may be determined that no neighboring cell interference exists on a kth RB corresponding to the nth subframe, and further, it is determined that no neighboring cell parameter blind detection procedure is performed on the kth RB corresponding to the nth subframe.

Further, in a specific embodiment of the present invention, when the preset relative threshold value is 0.5, the fourth ratio is smaller than 0.5, that is, the ratio of the accumulated neighboring cell received power to the accumulated received power is smaller than 0.5, it may be considered that the accumulated neighboring cell received power is much smaller than the accumulated received power, that is, the probability of generating interference is small, that is, there is no neighboring cell interference on the kth RB corresponding to the nth subframe, and it is determined that the blind neighboring cell parameter detection procedure is not performed on the kth RB corresponding to the nth subframe.

In summary, in the specific embodiment of the present invention, through the steps 205c-1 to 205c-3, the interference detection apparatus may obtain the fourth ratio by performing proportional operation on the accumulated neighboring cell received power and the accumulated received power, and compare the fourth ratio with the preset relative threshold, and when the fourth ratio is smaller than the preset relative threshold, it may be determined that there is no neighboring cell interference on the kth RB corresponding to the nth subframe, so as to end the neighboring cell parameter blind detection operation, implement reduction of signaling overhead of the blind detection process, and effectively improve efficiency of interference cancellation.

Based on the methods of the fourth to sixth embodiments, fig. 8 is a comparison graph of the neighboring cell interference detection performance and the ideal detection performance of the method of the present invention in the NAICS mode, as shown in fig. 8, assuming that the LTE-a TDD system has a TM4 transmission mode and an INR1 is 13.92dB, by using the technical scheme provided by the present invention, the simulation performance of the neighboring cell interference presence detection and the neighboring cell ideal interference detection are substantially consistent, so it can be considered that the interference detection method of the present invention has an obvious effect. And whether the PRB has the PDSCH interference of the adjacent region or not is determined, when the PDSCH interference of the adjacent region does not exist, the blind detection operation of the parameters of the adjacent region can be finished, and the blind detection operation aiming at the PRB with the PDSCH interference is realized, so that the signaling overhead of the blind detection process is reduced, and the interference elimination efficiency is effectively improved.

EXAMPLE seven

Fig. 9 is a schematic diagram of a first configuration of an interference detection apparatus according to an embodiment of the present invention, as shown in fig. 9, in an embodiment of the present invention, an interference detection apparatus 1 includes an obtaining unit 11, a calculating unit 12, and a determining unit 13, wherein,

an obtaining unit 11, configured to obtain 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 acquiring a neighbor receiving signal of each subcarrier from a receiving signal of each subcarrier of an RB on the ith symbol.

A calculating unit 12, configured to calculate a first received power of an RB on an ith symbol according to a 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 calculating the adjacent region receiving power of an RB on the ith symbol according to the adjacent region receiving signal of each subcarrier.

And the determining unit 13 is configured to determine 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 determine whether to perform a neighboring cell parameter blind detection procedure on the RB.

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

Based on the foregoing fig. 9 and fig. 10 are schematic structural diagrams illustrating a second configuration of the interference detection apparatus according to the embodiment of the present invention, as shown in fig. 10, in the embodiment of the present invention, the interference detection apparatus 1 further includes a blind detection unit 14.

The calculating 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 determining unit 13 is specifically configured to determine that there is no neighboring cell interference on the RB if the first ratio is less than or equal to a preset absolute threshold; and if the first ratio is larger than a 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 a 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 14 is configured to end the neighboring cell parameter blind detection process when it is determined that there is no neighboring cell interference on the RB.

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

The determining unit 13 is further configured to determine that there is neighboring cell interference on the RB if the second ratio is greater than or equal to a preset relative threshold; and if the second ratio is smaller than a preset relative threshold, judging that no adjacent cell interference exists on the RB.

The blind detection unit 14 is further configured to perform a blind detection procedure of neighboring cell parameters on the RB when it is determined that neighboring cell interference exists on the RB.

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

A calculating unit 12, further configured to perform an 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 an 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; and 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.

And the judging unit 13 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 a preset power threshold, and further judge whether to perform a neighboring cell parameter blind detection procedure on the RB.

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

The calculating 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 determining unit 13 is further specifically configured to determine that there is no neighboring cell interference on the RB if the third ratio is less than or equal to a preset absolute threshold; and if the third ratio is larger 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.

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

The determining unit 13 is further configured to determine that there is neighboring cell interference on the RB if the fourth ratio is greater than or equal to a preset relative threshold; and if the fourth ratio is smaller than a preset relative threshold, judging that no adjacent cell interference exists on the RB.

The obtaining unit 11, the calculating unit 12, the judging unit 13 and the blind detecting unit 14 provided by the embodiment of the present invention can be implemented by executing corresponding functions by a processor in the interference detecting apparatus in the form of program codes; of course, the implementation can also be realized through a specific logic circuit; in the process of the specific embodiment, the processor may be a Central Processing Unit (CPU), a Microprocessor (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like, and the obtaining unit 11 is implemented by a receiver, which may be composed of a filter, an amplifier, an a/D converter, or the like. The interference detection device further includes: the memory can be a memory device with a physical form, such as a memory bank and a TF card, or a circuit with a memory function, such as a Random Access Memory (RAM), a FIFO memory and the like.

The interference detection device provided by the invention obtains the received signal of each subcarrier in a resource module RB corresponding to the ith symbol, and calculates the 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 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 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; and judging whether the 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 the adjacent cell parameter blind detection process is carried out on the RB. Therefore, the interference detection device provided by the embodiment of the invention can realize the blind detection operation of the parameters of the adjacent cell aiming at the PRB with the PDSCH interference by determining whether the PRB has the PDSCH interference of the adjacent cell, thereby reducing the signaling overhead of the blind detection process and effectively improving the efficiency of interference elimination; moreover, the method is simple and convenient to realize, convenient to popularize and wide in 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 present 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 (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

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

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. An interference detection method, the method comprising:

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:

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:

3. The method of claim 1, further comprising:

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:

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:

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

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,

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;

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 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,

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;