CN108259094B - LTE network uplink interference optimization method and device - Google Patents
LTE network uplink interference optimization method and device Download PDFInfo
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- CN108259094B CN108259094B CN201611247596.0A CN201611247596A CN108259094B CN 108259094 B CN108259094 B CN 108259094B CN 201611247596 A CN201611247596 A CN 201611247596A CN 108259094 B CN108259094 B CN 108259094B
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Abstract
The invention discloses a method and a device for optimizing uplink interference of an LTE (Long term evolution) network, wherein the method comprises the following steps: acquiring MR of each preset adjacent cell of a target cell; screening out the first MRs based on the acquired preset screening parameters carried in the MRs; determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset adjacent region and the preset power parameter carried by each first MR; and optimizing the uplink interference of the target cell based on the target interference area and the preset power parameters carried by each second MR. The method and the device determine the region generating the maximum interference to the uplink of the target cell by analyzing the MR of the adjacent region of the target cell, optimize the uplink interference of the target cell based on the MR corresponding to the region, do not need to carry out signaling interaction among the cells, and solve the problem that the prior art needs to carry out signaling interaction among the cells to influence the use of frequency resources.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for optimizing uplink interference of an LTE (long term evolution) network.
Background
The uplink interference of a Long Term Evolution (LTE) network is mainly: user Equipment (UE) in an adjacent cell of the interfered cell sends an uplink signal to cause uplink background noise rise of the interfered cell (a scene is shown in fig. 1). The strength of the interference is related to the uplink traffic volume, UE distribution, network structure and other factors of the neighboring cell.
The 3rd Generation Partnership Project (3 GPP) organization proposes various interference suppression and cancellation techniques for LTE network uplink interference.
In LTE protocol version Release 8, 3GPP proposes an Inter-Cell Interference Coordination (ICIC) technique, which mainly reduces Inter-Cell traffic channel Interference by coordinating resource scheduling and allocation in a frequency domain.
In LTE protocol version Release10, 3GPP proposes an enhanced Inter-Cell Interference Coordination (eICIC) technique, which mainly refers to an Almost Blank Subframe (ABS) time domain technique, and reduces the problem of Inter-Cell control channel Interference by coordinating resource scheduling and allocation in the time domain.
In LTE protocol version Release 11, 3GPP proposes a Further enhanced inter-cell interference coordination (fercic) technique for incomplete work in LTE protocol version Release10, that is, for the problem of Common Reference Signals (CRS) interference in ABS technology, and mainly includes enhanced ABS transmission signal processing and power reduction ABS technology.
In LTE protocol Release 12, 3GPP proposes a Network-Assisted Interference Cancellation and Suppression (NAICS) technology. The NAICS technology belongs to an Advanced receiver (Advanced Receivers) technology, mainly aims at the interference of a Physical Downlink Shared Channel (PDSCH), provides interference information by a cell base station, assists the UE of a cell to estimate and eliminate the interference of a neighboring cell, and achieves the purpose of reducing the interference of the neighboring cell.
The interference suppression and elimination techniques all need signaling interaction between cells, limit the degree of freedom of frequency resource usage to a certain extent, and reduce the usage efficiency of frequency resources, and in addition, the LTE network uplink interference further includes: GPS out-of-step interference (scenario shown in fig. 2) and long-distance co-channel interference (scenario shown in fig. 3) caused by atmospheric waveguide effect, it is seen that due to complexity of uplink interference of LTE network, the above interference suppression and cancellation techniques are also difficult to achieve the expected effect. More importantly, with the continuous increase of LTE users, the traffic volume will continue to increase, and the uplink interference degree of the LTE network will further increase, so that there is an urgent need for an uplink interference optimization method for the LTE network to ensure the operation quality of the LTE network.
Disclosure of Invention
In view of the above problems, the present invention provides an LTE network uplink interference optimization method and apparatus that overcome the above problems or at least partially solve the above problems.
In a first aspect, the present invention provides an LTE network uplink interference optimization method, including:
acquiring a measurement report MR of each preset adjacent cell of a target cell; the target cell is a cell to be subjected to uplink interference optimization;
screening out the first MRs based on the acquired preset screening parameters carried in the MRs;
determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset adjacent region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is maximum;
and optimizing the uplink interference of the target cell based on the target interference area and the preset power parameters carried by the second MRs.
Optionally, the screening out each first MR based on the obtained preset screening parameters carried in each MR includes:
performing first screening based on the obtained physical cell identifier PCI of the adjacent cell carried in each MR to obtain a first screening set; the first screening set is a set formed by MRs of which the PCI of the adjacent cell is the same as that of the target cell;
performing second screening on each MR in the first screening set based on a serving cell carrier frequency point Earfcn carried by each MR in the first screening set to obtain a second screening set; the second screening set is a set formed by MRs of a service cell Earfcn and the target cell Earfcn with same-frequency interference;
performing third screening on each MR in the second screening set based on the number of PRBs (physical resource blocks) occupied by a Physical Uplink Shared Channel (PUSCH) carried by each MR in the second screening set to obtain each first MR; and the number of PRBs occupied by the PUSCH carried by each first MR is nonzero.
Optionally, determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset neighboring region and a preset power parameter carried by each first MR, includes:
determining each first MR corresponding to each preset area based on the longitude and latitude information of each preset area corresponding to each preset adjacent area and the longitude and latitude information of each first MR;
determining the sum of the interference power of each first MR corresponding to each preset region to the target cell based on preset power parameters carried by each first MR corresponding to each preset region;
and respectively determining a region corresponding to the maximum interference power sum and each first MR corresponding to the region as the target interference region and each second MR corresponding to the target interference region.
Optionally, the determining, based on preset power parameters carried by the first MRs corresponding to the preset regions, a sum of interference powers, to the target cell, of the first MRs corresponding to the preset regions includes:
determining link loss L from each first MR corresponding to each preset region to the target cell based on the RSRP carried by each first MR corresponding to each preset region;
determining the transmission power P consumed by each first MR corresponding to each preset region based on the UE transmission power margin carried by each first MR corresponding to each preset region;
and determining the sum of the interference power of each first MR corresponding to each preset area to the target cell based on the link loss L and the transmitting power P.
Optionally, the optimizing the uplink interference of the target cell based on the target interference region and the preset power parameter carried by each second MR includes:
determining a difference value of the RSRP of the serving cell and the RSRP of the neighboring cell carried by each second MR;
counting a first proportion of difference values which are larger than a preset first optimization threshold in each difference value, counting a second proportion of difference values which are in a range formed by the first optimization threshold and a second optimization threshold in each difference value, and counting a third proportion of difference values which are smaller than the second optimization threshold in each difference value; wherein the first optimization threshold is greater than the second optimization threshold;
if the first ratio is larger than a first preset ratio, generating first optimization information for indicating capacity expansion of a cell where the target interference area is located, wherein the capacity expansion capacity is a preset capacity;
if the second proportion is larger than a second preset proportion, second optimization information is generated and used for indicating that the base station antenna of the target cell is adjusted and the adjusted angle is a preset angle;
and if the third ratio is greater than a third preset ratio, generating third optimization information for indicating to adjust the switching threshold and the reselection threshold of the target cell, so that the switching threshold and the reselection threshold of the target cell are respectively higher than the switching threshold and the reselection threshold of the cell where the target interference area is located.
In a second aspect, the present invention further provides an apparatus for optimizing uplink interference in an LTE network, including:
the acquisition unit is used for acquiring a measurement report MR of each preset adjacent cell of the target cell; the target cell is a cell to be subjected to uplink interference optimization;
the screening unit is used for screening out the first MRs based on the acquired preset screening parameters carried in the MRs;
a determining unit, configured to determine a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset neighboring region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is maximum;
and the optimization unit is used for optimizing the uplink interference of the target cell based on the target interference area and the preset power parameters carried by the second MRs.
Optionally, the screening unit includes:
the first screening subunit is configured to perform first screening based on the acquired physical cell identifier PCI of the neighboring cell carried in each MR to obtain a first screening set; the first screening set is a set formed by MRs of which the PCI of the adjacent cell is the same as that of the target cell;
a second screening subunit, configured to perform a second screening on each MR in the first screening set based on a serving cell carrier frequency point Earfcn carried by each MR in the first screening set, so as to obtain a second screening set; the second screening set is a set formed by MRs of a service cell Earfcn and the target cell Earfcn with same-frequency interference;
a third screening subunit, configured to perform third screening on each MR in the second screening set based on the number of PRBs occupied by a PUSCH (physical uplink shared channel) carried by each MR in the second screening set, to obtain each first MR; and the number of PRBs occupied by the PUSCH carried by each first MR is nonzero.
Optionally, the determining unit includes:
a first determining subunit, configured to determine, based on the longitude and latitude information of each preset region corresponding to each preset neighboring region and the longitude and latitude information of each first MR, each first MR corresponding to each preset region;
a second determining subunit, configured to determine, based on preset power parameters carried by the first MRs corresponding to the preset regions, a sum of interference powers, to the target cell, of the first MRs corresponding to the preset regions;
and a third determining subunit, configured to determine a region corresponding to the maximum sum of the interference powers and each first MR corresponding to the region as the target interference region and each second MR corresponding to the target interference region.
Optionally, the second determining subunit is specifically configured to:
determining link loss L from each first MR corresponding to each preset region to the target cell based on the RSRP carried by each first MR corresponding to each preset region;
determining the transmission power P consumed by each first MR corresponding to each preset region based on the UE transmission power margin carried by each first MR corresponding to each preset region;
and determining the sum of the interference power of each first MR corresponding to each preset area to the target cell based on the link loss L and the transmitting power P.
Optionally, the optimization unit is specifically configured to:
determining a difference value of the RSRP of the serving cell and the RSRP of the neighboring cell carried by each second MR;
counting a first proportion of difference values which are larger than a preset first optimization threshold in each difference value, counting a second proportion of difference values which are in a range formed by the first optimization threshold and a second optimization threshold in each difference value, and counting a third proportion of difference values which are smaller than the second optimization threshold in each difference value; wherein the first optimization threshold is greater than the second optimization threshold;
if the first ratio is larger than a first preset ratio, generating first optimization information for indicating capacity expansion of a cell where the target interference area is located, wherein the capacity expansion capacity is a preset capacity;
if the second proportion is larger than a second preset proportion, second optimization information is generated and used for indicating that the base station antenna of the target cell is adjusted and the adjusted angle is a preset angle;
and if the third ratio is greater than a third preset ratio, generating third optimization information for indicating to adjust the switching threshold and the reselection threshold of the target cell, so that the switching threshold and the reselection threshold of the target cell are respectively higher than the switching threshold and the reselection threshold of the cell where the target interference area is located.
After a target cell interfered by LTE network uplink is determined, an MR of a neighbor cell of the target cell is analyzed, a region generating maximum interference on the uplink of the target cell is determined, the uplink interference of the target cell is optimized based on power related information carried by the MR corresponding to the region, signaling interaction among the cells is not needed, upgrading of network functions or adoption of a new technology are not involved, and the problems that signaling interaction among the cells is needed, the use freedom of frequency resources is limited, and the use efficiency of the frequency resources is reduced in the prior art are solved.
Drawings
Fig. 1 is a schematic view of a scenario in which uplink interference of an LTE network is uplink background noise rise of an interfered cell caused by uplink signal transmission by neighboring cell UE of the interfered cell in the prior art;
fig. 2 is a schematic view of a scenario in which uplink interference of an LTE network is GPS out-of-step interference in the prior art;
fig. 3 is a scene schematic diagram of long-distance co-channel interference caused by an atmospheric waveguide effect in the LTE network in the prior art;
fig. 4 is a flowchart of an LTE network uplink interference optimization method according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of an LTE network uplink interference optimization apparatus according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of an LTE network uplink interference optimization apparatus according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention.
It should be noted that, in this document, relational terms such as "first" and "second", and the like are used only to distinguish the same names, and do not imply a relationship or order between the names.
The LTE network adopts a co-Frequency networking technology and is a self-interference communication system, and because the uplink of the LTE network adopts a Single-carrier Frequency-Division Multiple Access (SC-FDMA) technology, the interference between the UE in the same cell does not exist. However, the UE in the neighboring cell of the LTE network sends an uplink signal to interfere with the uplink of the cell, which affects the performance of the LTE network, as shown in fig. 1:
user equipment UE3 and UE4 in a time division LTE (TD-LTE) cell 2 send uplink signals, which cause interference to a TD-LTE cell 1; the uplink signal sent by UE2 in TD-LTE cell 1 may cause interference to TD-LTE cell 2 (since UE1 is far away from the base station of TD-LTE cell 2, the interference is negligible).
As shown in fig. 4, the embodiment discloses an uplink interference optimization method for an LTE network, where an execution subject of the method may be a network management system of each communication operator, or may be a device set in the network management system, and the method may include the following steps 401 to 404:
401. acquiring a Measurement Report (MR) of each preset adjacent cell of a target cell; and the target cell is a cell to be subjected to uplink interference optimization.
In this embodiment, after determining the target cell interfered by the LTE network uplink, each preset neighboring cell of the target cell may be determined, and the determination manner may be implemented by using the prior art (e.g., by using an engineering parameter), which is not described in detail in this embodiment. The measurement report of each preset neighboring cell is measured and reported by User Equipment (UE) in each preset neighboring cell.
402. And screening out the first MRs based on the acquired preset screening parameters carried in the MRs.
In this embodiment, the MR carries various information, for example: UE transmit Power margin, Physical Cell Identifier (PCI) measured by the UE, frequency point Earfcn of neighboring Cell carrier measured by the UE, frequency point Earfcn of serving Cell carrier measured by the UE, PCI of serving Cell measured by the UE, Reference Signal Receiving Power (RSRP) measured by the UE, RSRP of serving Cell measured by the UE, Physical Resource Block (PRB) number occupied by Physical Uplink Shared Channel (PUSCH), Angle of Arrival (Angle of Arrival, AoA) of base station (eNB) of serving Cell, Timing Advance (TA) of serving Cell, and the like.
In this embodiment, the preset screening parameters carried in the MR are parameters related to the target cell, and the preset screening parameters include: and the number of PRBs occupied by the PCI of the adjacent cell, the Earfcn of the serving cell and the PUSCH.
In this embodiment, each first MR may also be an MR that may generate uplink interference on the target cell, that is, the UE sends the first MR and may generate uplink interference on the target cell.
403. Determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset adjacent region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is the largest.
In this embodiment, rasterization processing is performed in advance on each preset area corresponding to each preset neighboring cell, that is, on the coverage area of each neighboring cell, for example: dividing the coverage area of each neighboring cell into a plurality of grids, wherein the size of each grid can be a fixed value (such as a range of 50 m × 50 m) or an unfixed value, that is, each grid is different in size; of course, the coverage area of each neighboring cell may also be divided into a grid.
In this embodiment, after the coverage area of each neighboring cell is rasterized in advance, one or more grids corresponding to each preset neighboring cell, that is, one or more preset areas corresponding to each preset neighboring cell, and meanwhile, the latitude and longitude coordinate range of each area is also determined.
In this embodiment, the preset power parameters carried by the MR include: the adjacent cell RSRP and the UE transmitting power margin.
404. And optimizing the uplink interference of the target cell based on the target interference area and the preset power parameters carried by the second MRs.
It can be seen that, in the method for optimizing LTE network uplink interference disclosed in this embodiment, after a target cell interfered in LTE network uplink is determined, an area generating the maximum interference to the uplink of the target cell is determined by analyzing an MR in a neighboring area of the target cell, and the uplink interference of the target cell is optimized based on power related information carried by the MR corresponding to the area, without signaling interaction between cells, and without involving upgrading of network functions or adoption of a new technology, the problems that signaling interaction between cells is required in the prior art, the degree of freedom in use of frequency resources is limited, and the use efficiency of the frequency resources is reduced are solved.
Further, the LTE network uplink interference optimization method disclosed in this embodiment controls the LTE network uplink interference to an acceptable degree (determined according to actual conditions), and ensures the operation quality of the LTE network.
In a specific example, the step 402 of screening out each first MR based on the obtained preset screening parameters carried in each MR specifically includes the following steps 4021 to 4023 which are not shown in fig. 4:
4021. performing first screening based on the obtained physical cell identifier PCI of the adjacent cell carried in each MR to obtain a first screening set; the first screening set is a set formed by MRs of which the PCI of the adjacent cell is the same as that of the target cell.
4022. Performing second screening on each MR in the first screening set based on a serving cell carrier frequency point Earfcn carried by each MR in the first screening set to obtain a second screening set; the second screening set is a set formed by MRs of a service cell Earfcn and the target cell Earfcn with same frequency interference.
In this embodiment, the second screening set is a set formed by the serving cell Earfcn and each MR in the target cell Earfcn that may have co-channel interference, and the case that co-channel interference may exist is as follows: the serving cell Earfcn is the same as the target cell Earfcn, or the serving cell Earfcn is different from the target cell Earfcn, but the serving cell and the target cell are calculated to have frequency overlap according to the system bandwidth configuration, and the calculation method may adopt the existing method, which is not described in detail in this embodiment.
4023. Performing third screening on each MR in the second screening set based on the number of PRBs (physical resource blocks) occupied by a Physical Uplink Shared Channel (PUSCH) carried by each MR in the second screening set to obtain each first MR; and the number of PRBs occupied by the PUSCH carried by each first MR is nonzero.
In this embodiment, considering that there is a possibility of generating interference to the target cell if the number of PRBs occupied by PUSCH is nonzero, it is assumed that interference may occur to the target cell if uplink data transmission is performed, and therefore, each MR in the second filtering set is subjected to third filtering based on the number of PRBs occupied by PUSCH carried by each MR in the second filtering set, and each first MR is obtained.
In a specific example, the determining, in step 403, a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset neighboring cell and a preset power parameter carried by each first MR specifically includes the following steps 4031 to 4033 not shown in fig. 4:
4031. and determining each first MR corresponding to each preset area based on the longitude and latitude information of each preset area corresponding to each preset adjacent area and the longitude and latitude information of each first MR.
In this embodiment, the latitude and longitude information of each first MR may be determined based on information such as a location of a cell base station to which the UE reporting each first MR belongs, UE measurement signal strength, and the like, and the specific determination manner may be an existing manner, which is not described in detail in this embodiment.
4032. And determining the sum of the interference power of each first MR corresponding to each preset region to the target cell based on preset power parameters carried by each first MR corresponding to each preset region.
4033. And respectively determining a region corresponding to the maximum interference power sum and each first MR corresponding to the region as the target interference region and each second MR corresponding to the target interference region.
In a specific example, in step 4032, the determining, based on the preset power parameter carried by each first MR corresponding to each preset area, a sum of interference powers, to the target cell, of each first MR corresponding to each preset area specifically includes the following steps a to C:
A. determining link loss L from each first MR corresponding to each preset region to the target cell based on the RSRP carried by each first MR corresponding to each preset region, wherein the unit is as follows: dB.
In this embodiment, the link loss L from each first MR to the target cell is equal to the reference signal transmission power preconfigured by the target cell, and the RSRP of the neighboring cell carried by each first MR is reduced.
B. Determining the transmission power P consumed by each first MR corresponding to each preset region based on the UE transmission power margin carried by each first MR corresponding to each preset region, wherein the unit is as follows: dB.
In this embodiment, the transmission power P consumed by each first MR is equal to the UE preset maximum transmission power minus the UE transmission power margin.
C. And determining the sum of the interference power of each first MR corresponding to each preset area to the target cell based on the link loss L and the transmitting power P.
In this embodiment, the interference power of each first MR to the target cell is the transmission power P consumed by each first MR, and the link loss L from each first MR to the target cell is reduced.
In a specific example, in step 404, optimizing the uplink interference of the target cell based on the target interference region and the preset power parameter carried by each second MR specifically includes the following steps 4041 to 4045, which are not shown in fig. 4:
4041. determining a difference value between the serving cell RSRP and the neighboring cell RSRP carried by each second MR, wherein the unit is as follows: dB.
4042. Counting a first proportion of difference values larger than a preset first optimization threshold in each difference value, counting a second proportion of difference values in a range formed by the first optimization threshold and a preset second optimization threshold in each difference value, and counting a third proportion of difference values smaller than the preset second optimization threshold in each difference value; wherein the first optimization threshold is greater than the preset second optimization threshold.
In this embodiment, the preset first optimization threshold is, for example, 6dB, the preset second optimization threshold is, for example, 0dB, the first proportion is, for example, 95%, the second proportion is, for example, any value between 20% and 30%, and the third proportion is, for example, 10%.
It should be noted that the above numerical values are only examples, and those skilled in the art can set specific values according to actual situations.
4043. And if the first proportion is larger than a first preset proportion, generating first optimization information for indicating the expansion of the cell where the target interference area is located, wherein the expanded capacity is preset capacity.
In this embodiment, if the first ratio is greater than a first preset ratio, it is described that the uplink interference of the target cell is mainly caused by a large uplink traffic volume of the cell where the target interference region is located, and therefore, in this embodiment, first optimization information is generated to indicate that the cell where the target interference region is located is expanded and the expanded capacity is a preset capacity, for example, one carrier is added, and a worker may perform an operation based on the first optimization information to implement optimization so as to reduce co-channel interference.
4044. And if the second proportion is greater than a second preset proportion, generating second optimization information for indicating that the base station antenna of the target cell is adjusted and the adjusted angle is a preset angle.
In this embodiment, if the first ratio is greater than the first preset ratio, it is indicated that the uplink interference of the target cell is mainly caused by an unreasonable network structure of the target cell. Therefore, in this embodiment, second optimization information is generated to indicate that the base station antenna of the target cell is adjusted and an adjusted angle is a preset angle, for example: the azimuth angle (i.e., horizontal direction) of the base station antenna is adjusted by 15 °, or the downlink angle (vertical direction) of the base station antenna is adjusted by 5 °.
It should be noted that the above numerical values are only examples, and those skilled in the art can set specific values according to actual situations.
4045. And if the third ratio is greater than a third preset ratio, generating third optimization information for indicating to adjust the switching threshold and the reselection threshold of the target cell, so that the switching threshold and the reselection threshold of the target cell are respectively higher than the switching threshold and the reselection threshold of the cell where the target interference area is located.
In this embodiment, if the third ratio is greater than a third preset ratio, it is described that the uplink interference of the target cell is mainly caused by an unreasonable setting of the switching threshold and the reselection threshold of the target cell, and therefore, in this embodiment, third optimization information is generated for indicating that the switching threshold and the reselection threshold of the target cell are adjusted, so that the switching threshold and the reselection threshold of the target cell are respectively higher than the switching threshold and the reselection threshold of the cell where the target interference area is located, for example, by 3dB, so as to reduce the probability of occurrence of high-interference UE in the neighboring cell. Wherein the unit of each threshold is dB.
It can be seen that, in the method for optimizing LTE network uplink interference disclosed in this embodiment, after a target cell interfered in LTE network uplink is determined, an area generating the maximum interference to the uplink of the target cell is determined by analyzing an MR in a neighboring area of the target cell, and the uplink interference of the target cell is optimized based on power related information carried by the MR corresponding to the area.
As shown in fig. 5, the present embodiment discloses an uplink interference optimization device for an LTE network, which can be set in a network management system of a communication operator or be a network management system, and the device may include the following units: the device comprises an acquisition unit 51, a screening unit 52, a determination unit 53 and an optimization unit 54, wherein the units are specifically described as follows:
an obtaining unit 51, configured to obtain a measurement report MR of each preset neighboring cell of the target cell; the target cell is a cell to be subjected to uplink interference optimization;
the screening unit 52 is configured to screen out each first MR based on the acquired preset screening parameters carried in each MR;
a determining unit 53, configured to determine a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset neighboring region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is maximum;
and an optimizing unit 54, configured to optimize uplink interference of the target cell based on the target interference region and the preset power parameter carried by each second MR.
The apparatus disclosed in this embodiment can implement the method flow shown in fig. 1, and therefore, the effect and description of the apparatus in this embodiment can refer to the method embodiment shown in fig. 1, which is not described herein again.
In a specific example, the screening unit 52 may include the following units not shown in fig. 5: a first screening subunit 521, a second screening subunit 522, and a third screening subunit 523, each of which is described in detail as follows:
a first screening subunit 521, configured to perform a first screening based on the obtained physical cell identifier PCI of the neighboring cell carried in each MR, to obtain a first screening set; the first screening set is a set formed by MRs of which the PCI of the adjacent cell is the same as that of the target cell;
a second screening subunit 522, configured to perform a second screening on each MR in the first screening set based on a serving cell carrier frequency point Earfcn carried by each MR in the first screening set, so as to obtain a second screening set; the second screening set is a set formed by MRs of a service cell Earfcn and the target cell Earfcn with same-frequency interference;
a third screening subunit 523, configured to perform third screening on each MR in the second screening set based on the number of physical resource blocks PRB occupied by the physical uplink shared channel PUSCH carried by each MR in the second screening set, to obtain each first MR; and the number of PRBs occupied by the PUSCH carried by each first MR is nonzero.
In a specific example, the determining unit 53 specifically includes the following units not shown in fig. 5: a first determining subunit 531, a second determining subunit 532, and a third determining subunit 533, which are specifically described as follows:
a first determining subunit 531, configured to determine, based on the longitude and latitude information of each preset region corresponding to each preset neighboring region and the longitude and latitude information of each first MR, each first MR corresponding to each preset region;
a second determining subunit 532, configured to determine, based on preset power parameters carried by the first MRs corresponding to the preset regions, a sum of interference powers, to the target cell, of the first MRs corresponding to the preset regions;
a third determining subunit 533, configured to determine a region corresponding to the maximum sum of the interference powers and the first MRs corresponding to the region as the target interference region and the second MRs corresponding to the target interference region, respectively.
In a specific example, the second determining subunit 532 is specifically configured to:
determining link loss L from each first MR corresponding to each preset region to the target cell based on the RSRP carried by each first MR corresponding to each preset region;
determining the transmission power P consumed by each first MR corresponding to each preset region based on the UE transmission power margin carried by each first MR corresponding to each preset region;
and determining the sum of the interference power of each first MR corresponding to each preset area to the target cell based on the link loss L and the transmitting power P.
In a specific example, the optimization unit 54 is specifically configured to:
determining a difference value of the RSRP of the serving cell and the RSRP of the neighboring cell carried by each second MR;
counting a first proportion of difference values larger than a preset first optimization threshold in each difference value, counting a second proportion of difference values in a range formed by the first optimization threshold and a preset second optimization threshold in each difference value, and counting a third proportion of difference values smaller than the preset second optimization threshold in each difference value; wherein the first optimization threshold is greater than the preset second optimization threshold;
if the first ratio is larger than a first preset ratio, generating first optimization information for indicating capacity expansion of a cell where the target interference area is located, wherein the capacity expansion capacity is a preset capacity;
if the second proportion is larger than a second preset proportion, second optimization information is generated and used for indicating that the base station antenna of the target cell is adjusted and the adjusted angle is a preset angle;
and if the third ratio is greater than a third preset ratio, generating third optimization information for indicating to adjust the switching threshold and the reselection threshold of the target cell, so that the switching threshold and the reselection threshold of the target cell are respectively higher than the switching threshold and the reselection threshold of the cell where the target interference area is located.
It can be seen that, in the LTE network uplink interference optimization apparatus disclosed in the embodiment, after a target cell interfered in the LTE network uplink is determined, an area generating the maximum interference to the uplink of the target cell is determined by analyzing the MR in the vicinity of the target cell, and the uplink interference of the target cell is optimized based on power related information carried by the MR corresponding to the area, without signaling interaction between the cells, and without involving upgrading of a network function or adoption of a new technology, the problem that signaling interaction between the cells is required in the prior art, the degree of freedom in use of frequency resources is limited, and the use efficiency of the frequency resources is reduced is solved.
Further, the LTE network uplink interference optimization apparatus disclosed in the embodiment controls the LTE network uplink interference to an acceptable degree (determined according to an actual situation), and ensures the operation quality of the LTE network.
Fig. 6 is a block diagram illustrating a structure of the LTE network uplink interference optimization apparatus shown in fig. 5.
Referring to fig. 6, the LTE network uplink interference optimization apparatus includes: a processor (processor)601, a memory (memory)602, a communication Interface (Communications Interface)603, and a bus 604;
wherein the content of the first and second substances,
the processor 601, the memory 602 and the communication interface 603 complete mutual communication through the bus 604;
the communication interface 603 is used for information transmission between external devices; external devices such as base stations of respective cells in this embodiment;
the processor 601 is configured to call the program instructions in the memory 602 to execute the methods provided by the method embodiments related to fig. 1, for example, including:
acquiring a measurement report MR of each preset adjacent cell of a target cell; the target cell is a cell to be subjected to uplink interference optimization;
screening out the first MRs based on the acquired preset screening parameters carried in the MRs;
determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset adjacent region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is maximum;
and optimizing the uplink interference of the target cell based on the target interference area and the preset power parameters carried by the second MRs.
The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the method embodiments related to fig. 1, for example comprising:
acquiring a measurement report MR of each preset adjacent cell of a target cell; the target cell is a cell to be subjected to uplink interference optimization;
screening out the first MRs based on the acquired preset screening parameters carried in the MRs;
determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset adjacent region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is maximum;
and optimizing the uplink interference of the target cell based on the target interference area and the preset power parameters carried by the second MRs.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform a method as provided by the method embodiments associated with fig. 1, for example, comprising:
acquiring a measurement report MR of each preset adjacent cell of a target cell; the target cell is a cell to be subjected to uplink interference optimization;
screening out the first MRs based on the acquired preset screening parameters carried in the MRs;
determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset adjacent region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is maximum;
and optimizing the uplink interference of the target cell based on the target interference area and the preset power parameters carried by the second MRs.
Those of ordinary skill in the art will understand that: all or part of the steps of the method provided by the method embodiments related to fig. 1 can be implemented by hardware related to program instructions, and the program can be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the server and the like are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. An LTE network uplink interference optimization method is characterized by comprising the following steps:
acquiring a measurement report MR of each preset adjacent cell of a target cell; the target cell is a cell to be subjected to uplink interference optimization;
screening out the first MRs based on the acquired preset screening parameters carried in the MRs;
determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset adjacent region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is maximum;
optimizing the uplink interference of the target cell based on the target interference area and preset power parameters carried by each second MR;
wherein, screening out each first MR based on the obtained preset screening parameters carried in each MR comprises:
performing first screening based on the obtained physical cell identifier PCI of the adjacent cell carried in each MR to obtain a first screening set; the first screening set is a set formed by MRs of which the PCI of the adjacent cell is the same as that of the target cell;
performing second screening on each MR in the first screening set based on a serving cell carrier frequency point Earfcn carried by each MR in the first screening set to obtain a second screening set; the second screening set is a set formed by MRs of a service cell Earfcn and the target cell Earfcn with same-frequency interference;
performing third screening on each MR in the second screening set based on the number of PRBs (physical resource blocks) occupied by a Physical Uplink Shared Channel (PUSCH) carried by each MR in the second screening set to obtain each first MR; the number of PRBs occupied by the PUSCH carried by each first MR is nonzero;
determining a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset adjacent region and a preset power parameter carried by each first MR, wherein the determining comprises the following steps:
determining each first MR corresponding to each preset area based on the longitude and latitude information of each preset area corresponding to each preset adjacent area and the longitude and latitude information of each first MR;
determining the sum of the interference power of each first MR corresponding to each preset region to the target cell based on preset power parameters carried by each first MR corresponding to each preset region;
and respectively determining a region corresponding to the maximum interference power sum and each first MR corresponding to the region as the target interference region and each second MR corresponding to the target interference region.
2. The method according to claim 1, wherein the determining a sum of interference powers, to the target cell, of the first MRs corresponding to the respective preset regions based on preset power parameters carried by the first MRs corresponding to the respective preset regions comprises:
determining link loss L from each first MR corresponding to each preset region to the target cell based on the RSRP carried by each first MR corresponding to each preset region;
determining the transmission power P consumed by each first MR corresponding to each preset region based on the UE transmission power margin carried by each first MR corresponding to each preset region;
and determining the sum of the interference power of each first MR corresponding to each preset area to the target cell based on the link loss L and the transmitting power P.
3. The method according to claim 1 or 2, wherein the optimizing the uplink interference of the target cell based on the target interference region and preset power parameters carried by the second MRs comprises:
determining a difference value of the RSRP of the serving cell and the RSRP of the neighboring cell carried by each second MR;
counting a first proportion of difference values which are larger than a preset first optimization threshold in each difference value, counting a second proportion of difference values which are in a range formed by the first optimization threshold and a second optimization threshold in each difference value, and counting a third proportion of difference values which are smaller than the second optimization threshold in each difference value; wherein the first optimization threshold is greater than the second optimization threshold;
if the first ratio is larger than a first preset ratio, generating first optimization information for indicating capacity expansion of a cell where the target interference area is located, wherein the capacity expansion capacity is a preset capacity;
if the second proportion is larger than a second preset proportion, second optimization information is generated and used for indicating that the base station antenna of the target cell is adjusted and the adjusted angle is a preset angle;
and if the third ratio is greater than a third preset ratio, generating third optimization information for indicating to adjust the switching threshold and the reselection threshold of the target cell, so that the switching threshold and the reselection threshold of the target cell are respectively higher than the switching threshold and the reselection threshold of the cell where the target interference area is located.
4. An uplink interference optimization device for an LTE network, comprising:
the acquisition unit is used for acquiring a measurement report MR of each preset adjacent cell of the target cell; the target cell is a cell to be subjected to uplink interference optimization;
the screening unit is used for screening out the first MRs based on the acquired preset screening parameters carried in the MRs;
a determining unit, configured to determine a target interference region and each second MR corresponding to the target interference region based on each preset region corresponding to each preset neighboring region and a preset power parameter carried by each first MR; the interference generated by the target interference area to the target cell is maximum;
an optimization unit, configured to optimize uplink interference of the target cell based on the target interference region and preset power parameters carried by the second MRs;
wherein, screening unit includes:
the first screening subunit is configured to perform first screening based on the acquired physical cell identifier PCI of the neighboring cell carried in each MR to obtain a first screening set; the first screening set is a set formed by MRs of which the PCI of the adjacent cell is the same as that of the target cell;
a second screening subunit, configured to perform a second screening on each MR in the first screening set based on a serving cell carrier frequency point Earfcn carried by each MR in the first screening set, so as to obtain a second screening set; the second screening set is a set formed by MRs of a service cell Earfcn and the target cell Earfcn with same-frequency interference;
a third screening subunit, configured to perform third screening on each MR in the second screening set based on the number of PRBs occupied by a PUSCH (physical uplink shared channel) carried by each MR in the second screening set, to obtain each first MR; the number of PRBs occupied by the PUSCH carried by each first MR is nonzero;
wherein the determination unit includes:
a first determining subunit, configured to determine, based on the longitude and latitude information of each preset region corresponding to each preset neighboring region and the longitude and latitude information of each first MR, each first MR corresponding to each preset region;
a second determining subunit, configured to determine, based on preset power parameters carried by the first MRs corresponding to the preset regions, a sum of interference powers, to the target cell, of the first MRs corresponding to the preset regions;
and a third determining subunit, configured to determine a region corresponding to the maximum sum of the interference powers and each first MR corresponding to the region as the target interference region and each second MR corresponding to the target interference region.
5. The apparatus according to claim 4, wherein the second determining subunit is specifically configured to:
determining link loss L from each first MR corresponding to each preset region to the target cell based on the RSRP carried by each first MR corresponding to each preset region;
determining the transmission power P consumed by each first MR corresponding to each preset region based on the UE transmission power margin carried by each first MR corresponding to each preset region;
and determining the sum of the interference power of each first MR corresponding to each preset area to the target cell based on the link loss L and the transmitting power P.
6. The apparatus according to claim 4 or 5, wherein the optimization unit is specifically configured to:
determining a difference value of the RSRP of the serving cell and the RSRP of the neighboring cell carried by each second MR;
counting a first proportion of difference values which are larger than a preset first optimization threshold in each difference value, counting a second proportion of difference values which are in a range formed by the first optimization threshold and a second optimization threshold in each difference value, and counting a third proportion of difference values which are smaller than the second optimization threshold in each difference value; wherein the first optimization threshold is greater than the second optimization threshold;
if the first ratio is larger than a first preset ratio, generating first optimization information for indicating capacity expansion of a cell where the target interference area is located, wherein the capacity expansion capacity is a preset capacity;
if the second proportion is larger than a second preset proportion, second optimization information is generated and used for indicating that the base station antenna of the target cell is adjusted and the adjusted angle is a preset angle;
and if the third ratio is greater than a third preset ratio, generating third optimization information for indicating to adjust the switching threshold and the reselection threshold of the target cell, so that the switching threshold and the reselection threshold of the target cell are respectively higher than the switching threshold and the reselection threshold of the cell where the target interference area is located.
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| CN111954224B (en) * | 2019-05-16 | 2022-04-01 | 大唐移动通信设备有限公司 | Method and device for processing same frequency interference |
| CN113923671B (en) * | 2020-07-07 | 2024-05-07 | 中国移动通信集团重庆有限公司 | Frequency resetting method, device, equipment and storage medium |
| CN115396973B (en) * | 2022-08-18 | 2024-03-12 | 中国联合网络通信集团有限公司 | Uplink interference suppression method, device and storage medium |
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