CN108696875B - Method and device for positioning same-frequency interference neighbor cells - Google Patents
Method and device for positioning same-frequency interference neighbor cells Download PDFInfo
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- CN108696875B CN108696875B CN201710218403.7A CN201710218403A CN108696875B CN 108696875 B CN108696875 B CN 108696875B CN 201710218403 A CN201710218403 A CN 201710218403A CN 108696875 B CN108696875 B CN 108696875B
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- H04J11/005—Interference mitigation or co-ordination of intercell interference
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Abstract
The invention relates to a method for positioning co-channel interference neighbor cells, which comprises the following steps: demodulating an uplink interference signal of a high-interference cell according to uplink resource scheduling information corresponding to the current neighbor cell of the obtained high-interference cell to obtain the intensity of the demodulated interference signal; and reporting the demodulated interference signal strength to a network management server so that the network management server judges whether the current neighbor cell causes interference to the high-interference cell according to a preset uplink interference signal strength threshold. The same-frequency interference neighbor cell can be positioned quickly, accurately and without manual intervention. In addition, a device for locating the same-frequency interference neighbor cell is also provided.
Description
Technical Field
The present invention relates to mobile communication technology, and in particular, to a method and apparatus for locating co-channel interference neighboring cells.
Background
With the development of mobile technology, LTE (Long Term Evolution, long term evolution system) has completed scale coverage, and reasonable planning of LTE base station site and control cell overlapping coverage has important significance for effectively avoiding inter-cell interference. While the key technology OFDMA (Orthogonal Frequency Division Multiple Access ) of the LTE system can distinguish each user within a cell using orthogonal codes, intra-system interference mainly comes from inter-cell co-channel interference.
With the increase of networking density, the background noise of the LTE cell is increased, the interference level is improved, but the current checking and positioning means of the same-frequency interference neighbor cell are limited, and the experience of professional technicians is highly relied on, so that the same-frequency interference neighbor cell cannot be automatically positioned.
Disclosure of Invention
Based on this, it is necessary to provide a method and a device for locating co-channel interference neighbor cells quickly, accurately and without manual intervention.
A method of locating co-channel interfering neighbors, the method comprising:
demodulating an uplink interference signal of a high-interference cell according to uplink resource scheduling information corresponding to the current neighbor cell of the obtained high-interference cell to obtain the intensity of the demodulated interference signal;
and reporting the demodulated interference signal strength to a network management server so that the network management server judges whether the current neighbor cell causes interference to the high-interference cell according to a preset uplink interference signal strength threshold.
An apparatus for locating co-channel interfering neighbors, the apparatus comprising:
the demodulation module is used for demodulating the uplink interference signal of the high-interference cell according to the uplink resource scheduling information corresponding to the current neighbor cell of the obtained high-interference cell to obtain the intensity of the demodulated interference signal;
And the interference checking module is used for reporting the demodulated interference signal strength to a network management server so that the network management server can judge whether the current neighbor cell interferes with the high-interference cell according to a preset uplink interference signal strength threshold.
According to the method and the device for positioning the same-frequency interference neighbor cell, the uplink interference signal of the high-interference cell is demodulated according to the uplink resource scheduling information corresponding to the current neighbor cell of the high-interference cell, the demodulated interference signal strength is obtained, and the interference signal strength is reported to the network management server, so that the network management server judges whether the current neighbor cell interferes with the high-interference cell according to the preset uplink interference signal strength threshold. The uplink interference signals of the high-interference cells are demodulated by acquiring the uplink resource scheduling information of the current neighbor cell and reported to the network management server for investigation, so that whether the current neighbor cell is an interference neighbor cell of the high-interference cells or not is determined, and the investigation of the neighbor cells of the high-interference cells can be rapidly and accurately carried out without manual intervention.
Drawings
FIG. 1 is a flow chart of a method for locating co-channel interference neighbors in one embodiment;
FIG. 2 is a flow chart of a method of demodulating an interfering signal in one embodiment;
FIG. 3 is a flow chart of a method for locating co-channel interference neighbors in another embodiment;
FIG. 4 is a flow chart of a method for locating co-channel interference neighbors in yet another embodiment;
FIG. 5 is a flow chart of a method for locating co-channel interference neighbors in an embodiment;
fig. 6 is a schematic diagram illustrating an investigation of interference between a high interference cell and a nearest neighbor cell in one embodiment;
FIG. 7 is a schematic diagram illustrating an exemplary investigation of a high interference cell interference source from a non-neighboring cell;
FIG. 8 is a block diagram of an embodiment of a device for locating co-channel interference neighbors;
fig. 9 is a block diagram of another embodiment of a device for locating co-channel interference neighbors;
fig. 10 is a block diagram of a structure for locating co-channel interference neighbor cell devices in yet another embodiment.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, in one embodiment, a method for locating co-channel interference neighboring cells is provided, which includes the following steps:
step S110, the uplink interference signals of the high interference cells are demodulated according to the uplink resource scheduling information corresponding to the current neighbor cells of the obtained high interference cells, and the strength of the demodulated interference signals is obtained.
Specifically, the adjacent cell uplink resource scheduling information allocates resources and schedules the adjacent cell terminals to generate uplink signals, so that corresponding uplink signals can be demodulated according to the uplink resource scheduling information, and corresponding uplink signal strength is obtained. The uplink interference signal of the high interference cell refers to a signal which causes interference to the high interference cell in the uplink signals generated by the adjacent cells of the high interference cell, so that the uplink resource scheduling information of the current adjacent cell of the high interference cell is obtained to demodulate the uplink interference signal of the high interference cell, and the uplink signal corresponding to the current adjacent cell in the uplink interference signal of the demodulated high interference cell can be obtained to obtain the corresponding signal strength.
Step S120, the demodulated interference signal intensity is reported to the network management server, so that the network management server judges whether the current neighbor cell causes interference to the high interference cell according to the preset uplink interference signal intensity threshold.
Specifically, the corresponding interference signal intensity is obtained according to the uplink resource scheduling information of the neighboring cell and then uploaded to the network management server, so that the network management server judges whether the uplink signal generated by the current neighboring cell interferes with the high-interference cell according to a pre-stored preset uplink interference signal intensity threshold, and the investigation of the current neighboring cell is completed.
In this embodiment, the uplink interference signal of the high interference cell is demodulated according to the obtained uplink resource scheduling information corresponding to the current neighboring cell of the high interference cell, so as to obtain the demodulated interference signal strength, and the interference signal strength is reported to the network management server, so that the network management server determines whether the current neighboring cell interferes with the high interference cell according to the preset uplink interference signal strength threshold. The uplink interference signals of the high-interference cells are demodulated by acquiring the uplink resource scheduling information of the current neighbor cell and reported to the network management server for investigation, so that whether the current neighbor cell is an interference neighbor cell of the high-interference cells or not is determined, and the investigation of the neighbor cells of the high-interference cells can be rapidly and accurately carried out without manual intervention.
As shown in fig. 2, in one embodiment, step S110 includes:
step S111, uplink resource scheduling information of the current neighboring cell is obtained, wherein the uplink resource scheduling information includes the position of the allocated resource of the terminal generating the uplink signal in the current neighboring cell.
Specifically, the obtained uplink resource scheduling information of the current neighboring cell includes a PCI (Physical Cell Identifier ) corresponding to the current neighboring cell, a terminal identifier corresponding to a terminal generating an uplink signal, and a location where a resource is allocated to the terminal. The location where the terminal is allocated with resources refers to a radio resource block occupied by the terminal when the terminal transmits an uplink signal. When the terminal transmits an uplink signal, the terminal acquires a radio resource block for transmitting the uplink signal by transmitting an uplink scheduling request. And obtaining a wireless resource block by dividing wireless channel resources in the same frequency band. Further, different terminals can use the same resource block at different times, and different terminals at the same time can use different resource blocks to transmit uplink signals.
Step S113, suspending the service of the position of the high interference cell corresponding to the allocated resource according to the position of the allocated resource of the terminal, and demodulating the uplink signal of the position of the corresponding allocated resource by utilizing the obtained uplink resource scheduling information of the current neighbor cell to obtain the corresponding interference signal intensity.
Specifically, when the resource allocation position corresponding to the terminal sending the uplink signal in the current neighboring cell is obtained according to the uplink resource scheduling of the current neighboring cell, the service of the position where the high interference cell corresponds to the allocated resource is suspended, and at this time, the uplink signal existing at the position where the high interference cell corresponds to the allocated resource of the neighboring cell terminal is the interference signal, which is also the uplink signal generated by the neighboring cell of the high interference cell, and the obtained uplink resource scheduling information of the current neighboring cell is utilized to demodulate the interference signal, so as to obtain the corresponding interference signal strength. For example, when it is detected that the position of the allocated resource of one of the terminals in the current neighboring cell is the radio resource block 40-50 according to the uplink resource scheduling information of the current neighboring cell, the use of the radio resource block 40-50 in the high interference cell is suspended, and an uplink signal still existing in the radio resource block of the high interference cell 40-50 after the use of the radio resource block 40-50 in the high interference cell is suspended is obtained, where the uplink signal is an interference signal corresponding to the radio resource block 40-50 in the high interference cell, that is, an uplink signal generated by the neighboring cell of the high interference cell and causing interference to the high interference cell. And demodulating by using the obtained current resource scheduling information to obtain the interference signal strength corresponding to the high-interference cell in the 40-50 wireless resource blocks.
In this embodiment, the location where the uplink signal terminal is allocated with the resource is obtained according to the obtained uplink resource scheduling information, the service of the resource location corresponding to the high interference cell is suspended, and the uplink signal existing in the resource location corresponding to the high interference cell after the service suspension is demodulated by using the uplink resource scheduling information, so as to obtain the strength of the uplink signal, that is, the strength of the uplink interference signal corresponding to the high interference cell. The method and the device can accurately and rapidly demodulate the interference signal of the high-interference cell without manual intervention, and acquire the corresponding interference signal strength, thereby completing the investigation of the neighboring cell of the high-interference cell.
In one embodiment, step S113 includes: and demodulating the uplink signal corresponding to the position of the allocated resource by using the obtained uplink resource scheduling information of the current adjacent cell, and if the demodulation check code is correct after demodulation, obtaining the corresponding interference signal strength when the current adjacent cell has the corresponding interference signal.
Specifically, after demodulating the uplink signal at the resource position corresponding to the high-interference cell according to the uplink resource scheduling information of the current neighboring cell, judging whether the corresponding demodulation check code is correct, if not, indicating that the obtained uplink resource scheduling information corresponding to the current neighboring cell cannot demodulate the uplink signal at the resource position corresponding to the high-interference cell, i.e. the interference signal at the resource position corresponding to the high-interference cell is not caused by the uplink signal of the current neighboring cell. If the corresponding demodulation check code is judged to be correct, the obtained uplink resource scheduling information corresponding to the current neighbor cell can demodulate the uplink signal of the resource position corresponding to the high-interference cell, namely the uplink signal generated by the current neighbor cell causes interference to the high-interference cell, and the strength of the corresponding interference signal is obtained.
In one embodiment, as shown in fig. 3, a method for locating co-channel interference neighboring cells is provided, before step S110, further includes:
step S102, periodically detecting and reporting interference information to a network management server, so that the network management server determines a high interference cell according to a preset interference information threshold, and generates an interference check neighbor set according to the neighbor of the high interference cell. .
Specifically, the high interference cell refers to a cell with interference information higher than a preset interference information threshold in cells covered by the base station. The interference rejection neighbor set refers to a set of neighbor cells including all high interference cells, and is used for rejecting neighbor cells causing interference to the high interference cells.
Further, before the neighbor cells in the interference check neighbor cell set are checked by using the uplink resource scheduling information of the current neighbor cell, a cell with a high interference signal in the base station is determined first, namely, a high interference cell is determined, and the neighbor cells corresponding to the high interference cell are further acquired to generate the interference check neighbor cell set. The base station detects interference information in the covered cells in real time and periodically reports the interference information to the network management server, so that the network management server compares the received interference information corresponding to each cell with a preset interference information threshold, determines the cells with the interference information exceeding the preset interference information threshold as high-interference cells, and generates an interference check neighbor set according to the neighbor corresponding to the high-interference cells.
Step S104, receiving the interference check neighbor set corresponding to the high interference cell sent by the network management server.
Step S106, one neighbor cell in the interference check neighbor cell set is used as a current neighbor cell, and a request for acquiring uplink resource scheduling information is sent to the current neighbor cell.
Specifically, the base station checks the neighboring cells of the high-interference cell according to the received interference check neighboring cell set sent by the network management server, and determines the interference neighboring cells of the high-interference cell. Firstly, selecting any one neighbor cell in an interference check neighbor cell set as a current check neighbor cell, and then sending a request for acquiring uplink resource scheduling information to the current check neighbor cell so as to acquire uplink resource scheduling information corresponding to the current check neighbor cell. The uplink resource scheduling information refers to information for scheduling uplink resources of a neighboring cell, such as physical cell identification of the neighboring cell, identification of a terminal sending an uplink signal, and the like.
In this embodiment, the interference information of each cell is monitored in real time and reported to the network management server, so that the network management server automatically determines the high interference cell with interference in the base station and the corresponding interference check neighbor set, and obtains one neighbor cell in the interference check neighbor set as the current neighbor cell of the high interference cell, and sends a request for obtaining uplink resource scheduling information to the current neighbor cell, so that the interference signal of the high interference cell is demodulated according to the uplink resource scheduling information, the high interference cell and the neighbor cell corresponding to the high interference cell are not required to be manually participated, the uplink resource scheduling information of the relevant neighbor cell is obtained, and convenience is provided for the subsequent interference check of the neighbor cell of the high interference cell.
In one embodiment, as shown in fig. 4, a method for locating co-channel interference neighboring cells is provided, and after step S120, the method further includes:
step S130, reporting the interference information of the high interference cell in real time while demodulating, so that the network management server judges whether the interference information of the high interference cell is lower than a preset interference information threshold, if yes, the step S140 is executed, and if not, the step S150 is executed.
Specifically, when demodulating uplink interference signals according to the obtained uplink resource scheduling information, detecting and reporting the interference information corresponding to the high-interference cell when demodulating the interference signals corresponding to the current neighbor cell in real time, so that the network management server judges whether the interference information of the high-interference neighbor cell received currently is lower than a preset interference information threshold or not, and determines whether the high-interference cell excludes an interference source or not. If yes, step S140 is executed, and if no, step S150 is executed.
And step S140, the network management server determines that the current neighbor cell causes interference to the high-interference cell, and stops the interference neighbor cell investigation of the high-interference cell.
Specifically, when the strength of an interference signal obtained by demodulating an uplink interference signal according to the obtained uplink signal of the current neighboring cell is greater than a preset uplink interference signal strength threshold, determining that the current neighboring cell causes interference to a high-interference cell. And when the uplink resource scheduling information of the current neighboring cell is used for demodulating the uplink interference signal of the high-interference cell, reporting the interference information of the high-interference cell to the network management server again, so that the network management server determines whether the current high-interference cell still has high interference according to the received interference information and a preset interference information threshold, if so, the interference of the current high-interference cell possibly comes from other neighboring cells except the current neighboring cell is indicated, the current neighboring cell is saved to an interference neighboring cell set, then the neighboring cell of the high-interference cell is continuously examined, and if not, the interference of the high-interference cell only comes from the current neighboring cell and the interference neighboring cell examination of the high-interference cell is stopped.
Step S150, the network management server is enabled to delete the current neighbor cell in the interference check neighbor cell set and update the interference check neighbor cell set.
Specifically, when the interference signal intensity obtained by demodulating the uplink interference signal according to the obtained uplink signal of the current neighboring cell is smaller than a preset uplink interference signal intensity threshold, the current neighboring cell is not interfered with the high interference cell, and the interference check is continuously performed on other neighboring cells in the interference check neighboring cell set.
Step S160, receiving the updated interference check neighboring cell set sent by the network management server, judging whether the interference check neighboring cell set is empty, if so, stopping the interference check of the high interference cell, and if not, executing step S170.
Specifically, after receiving the interference check neighboring cell set updated by the network management server deleting the current neighboring cell, determining whether the interference check neighboring cell set is empty, that is, determining whether the check of all neighboring cells of the high interference cell is completed, if yes, stopping the check of the interference neighboring cells of the high interference cell, if not, continuing to check the neighboring cells in the interference check neighboring cell set corresponding to the high interference cell, and executing step S170.
Step S170, one neighbor cell in the updated interference check neighbor cell set is used as a current neighbor cell, a request for acquiring uplink resource scheduling information is sent to the current neighbor cell, and step S110 is entered.
Specifically, when the received updated interference check neighboring cell set is not empty, one neighboring cell in the updated interference check neighboring cell set is obtained as a current neighboring cell, a request for obtaining uplink resource scheduling information is sent to the current neighboring cell, and after the current neighboring cell is obtained, step S110 is entered to check the current neighboring cell.
In the embodiment, by updating the interference check neighbor set, the checked neighbor is deleted, so that repeated check on the neighbor is avoided, the check efficiency is improved, the interference check process is repeatedly executed, and the check on all neighbors of the high-interference cell can be quickly and accurately completed without manual participation.
In one embodiment, when the interference source causing the high interference cell is not found after all the neighboring cells in the interference checking neighboring cell set are checked, that is, when the interference source causing the high interference cell is found not to come from the corresponding neighboring cell through checking, the network management server sends out an alarm to remind to perform artificial interference source checking.
In one embodiment, as shown in fig. 5, a method for locating co-channel interference neighboring cells is provided, which includes the following steps:
step S510, detecting the interference information of each cell in real time and periodically reporting the information to the network management server.
Specifically, the base station comprises an uplink checking unit, and the uplink checking unit can monitor interference information in each cell covered by the base station in real time and periodically report the interference information to the network management server. The network management server can collect interference information of different cells corresponding to the plurality of base stations and judge the state of a certain cell in the base stations according to the interference information.
Step S520, the network management server judges whether the reported interference information exceeds a preset interference information threshold, if yes, step S530 is executed, and if not, step S510 is returned.
Specifically, a preset interference information threshold is stored in the network management server in advance, and when the interference information is larger than the preset interference information threshold, the corresponding cell is indicated to have interference and is a high-interference cell. The uplink checking unit in the base station reports the interference information of each cell in the base station to the network management server, so that the network management server judges the high interference cell in each cell according to the preset interference information threshold and executes the subsequent steps. If the cell which is currently reported does not have the high interference cell, the network management server continues to acquire the cell interference information which is detected and reported by the base station in real time.
Step S530, the network management server determines the high interference cell, and generates an interference check neighbor list according to the neighbor corresponding to the high interference cell and the distance of the geographic position of the neighbor.
Specifically, when the interference information exceeding the preset interference information threshold exists in the cell interference information uploaded to the network management server by the base station, the network management server determines that the cell corresponding to the interference information is a high-interference cell, and starts the investigation of the same-frequency interference neighbor cell of the high-interference cell. And acquiring the neighbor cell corresponding to the high-interference cell, determining the position corresponding to the neighbor cell according to the neighbor cell PCI corresponding to the neighbor cell, and generating an interference check neighbor cell list according to the neighbor cell corresponding to the acquired high-interference cell and the distance of the geographic position of the neighbor cell.
Step S540, receiving an interference check neighbor list sent by the network management server, and selecting a neighbor with the nearest relative geographic position in the interference check neighbor list as a current neighbor.
Specifically, an interference check neighbor list sent by a network management server is received, neighbor cells in the interference check neighbor list are checked one by one, and firstly, a neighbor cell closest to the geographic position is selected as a current neighbor cell.
Step S550, the uplink resource scheduling information corresponding to the current neighboring cell is obtained, and the allocated resource position of the uplink signal generated by the current neighboring cell is determined.
Specifically, according to uplink resource scheduling information corresponding to the current neighbor cell, the position of the allocated resource of the uplink signal terminal, namely the wireless resource block for the terminal to send uplink signal call, is determined according to the uplink resource scheduling information. Radio resources in the same frequency band are generally divided into 100 radio resource blocks, different terminals use different radio resource blocks to transmit uplink signals at the same time, and different terminals can use the same radio resource blocks to transmit uplink signals at different times. Taking the investigation of the neighboring cell 1 closest to the interference investigation neighboring cell list as an example, for example, two terminals, namely a terminal A and a terminal B, exist in the neighboring cell 1 and transmit uplink signals, the terminal A occupies 0-40 wireless resource blocks, the terminal B occupies 41-99 wireless resource blocks, and the wireless resource blocks occupied by the terminal A and the terminal B in the neighboring cell 1, namely, the positions of allocated resources of the terminals generating the uplink signals in the neighboring cell 1, are obtained.
Step S560, suspending the service of the resource position corresponding to the allocated resource position of the high interference cell and the current adjacent cell, and demodulating the uplink interference signal by using the uplink resource scheduling information of the current adjacent cell to obtain the uplink interference signal strength.
Specifically, uplink resource scheduling information corresponding to a high-interference cell is obtained, service of the high-interference cell corresponding to the allocated resource position of the current neighbor cell is suspended by using the uplink resource scheduling information of the high-interference cell, and uplink interference signals of the resource position corresponding to the high-interference neighbor cell are demodulated by using the uplink resource scheduling information of the current neighbor cell, so that uplink interference signal strength is obtained.
For example, according to the uplink resource scheduling information of the neighboring cell 1 closest to the interference checking neighboring cell list, the position of the allocated resource of the terminal a in the neighboring cell 1 is 0-40 resource blocks, then the uplink resource scheduling information of the high interference cell is utilized to suspend the service of the high interference cell 0-40 resource blocks, at this time, the uplink signal in the high interference cell 0-40 resource blocks is the interference signal generated by the neighboring cell, the uplink resource scheduling information of the neighboring cell 1 is used to demodulate the interference signal, and after demodulation, whether the demodulation check code CRC (Cyclic Redundancy Check ) is correct or not is judged, if yes, it is indicated that the uplink resource scheduling information of the neighboring cell 1 can demodulate the interference signal, that is, the uplink interference signal in the high interference cell 0-40 resource blocks is generated by the neighboring cell 1, and the strength of the interference signal generated by the demodulated neighboring cell 1 is obtained.
Step S570, reporting the interference information of the high interference cell in real time while demodulating, so that the network management server judges whether the interference information of the high interference cell is lower than a preset interference information threshold, if not, step S580 is executed, and if so, the investigation of the interference neighbor cell of the high interference cell is stopped.
Specifically, the base station includes an uplink interference checking unit and a baseband processing unit, when uplink resource scheduling information of a neighboring cell and an uplink interference signal corresponding to a resource position of a high interference cell are obtained, the baseband processing unit demodulates the uplink interference signal, meanwhile, the uplink interference checking unit detects and reports the interference information of the high interference cell to a network management server again, the network management server acquires the interference information corresponding to the high interference cell in real time and compares the interference information with a preset interference information threshold again, if the interference information is lower than the preset interference information threshold, it is indicated that after demodulation is performed on a current neighboring cell, an interference source of the high interference cell is checked out, namely, the interference source of the high interference cell is the current neighboring cell, and at the moment, the checking of the interference neighboring cell of the high interference cell is stopped. If the obtained interference information of the current high interference cell is still greater than the preset interference information threshold, it is indicated that the current high interference cell still has an interference source, and step S580 is performed.
Step S580, the network management server deletes the current neighbor cell in the current interference check neighbor cell list, and updates the interference check neighbor cell.
Specifically, after the current interference neighbor cell is examined, when the interference signal strength of the current neighbor cell is found to not reach the preset uplink interference signal strength threshold or other interference sources still exist in the high interference cell, the examination of the other neighbor cells of the high interference cell is continued until all the interference sources are acquired. In order to avoid repeated investigation, deleting the current neighbor cell, and updating the interference investigation neighbor cell.
Step S590, receiving the updated interference check neighbor cell, judging whether the updated interference check neighbor cell is empty, if not, executing step S540, if so, stopping checking the interference neighbor cell of the high interference cell.
Specifically, the updated interference check neighbor is received, whether the updated interference check neighbor is empty is determined, if not, it is indicated that there is still an unaddressed neighbor, and step S540 is entered to continue interference check, for example, the interference check is performed by acquiring neighbor 2 in the updated interference check neighbor list. If so, indicating that all the neighboring cells of the high-interference cell are inspected, and if no interference source is found or other interference sources are found after all the inspection is completed, sending out a warning to remind the operator to inspect the interference source.
In this embodiment, the base station detects the interference information of each cell to determine a high interference cell, and generates a corresponding interference check neighbor list from the neighbors of the high interference cell at a distance, checks the neighbors of the high interference cell in sequence, demodulates the uplink interference signal of the high interference cell according to the uplink resource scheduling information of the current neighbor, checks whether the current neighbor causes interference, determines the interference neighbor of the high interference cell, monitors and reports the interference information of the high interference cell in real time, determines whether to end the check flow of the interference neighbor in real time, acquires the corresponding interference check neighbor or gives an alarm, checks the interference neighbor accurately and rapidly, and gives an alarm when the interference check is not checked, thereby improving the accuracy of the interference check.
As shown in fig. 6, in one embodiment, a method for locating co-channel interference from a nearest neighbor is provided, specifically as follows:
1. the base station uplink interference checking unit detects interference information of each cell in the station in real time, and periodically reports the detected interference information to the network management server. The reporting period can be set as required.
2. And the network management server receives the interference information periodically reported by the base station, if the two periods of the interference information of one cell are detected to be continuously higher than a preset interference information threshold, if the preset interference information threshold is-105 dbBm, the cell is determined to be a high-interference cell, the same-frequency interference neighbor cell checking flow aiming at the corresponding cell is started, an interference checking neighbor cell list is manufactured according to the neighbor cell list of the high-interference cell and neighbor cell geographic information, as shown in a table 1, and the manufactured table 1 is sent to the base station where the high-interference cell is located.
TABLE 1
3. The base station where the high interference cell is located sends a request for obtaining uplink scheduling information to one of the neighbor cells in the interference check neighbor cell list, for example, sends a request for obtaining uplink scheduling information to the neighbor cell 1.
4. After receiving a request for acquiring uplink scheduling information sent by a base station, a neighboring cell 1 corresponding to a high-interference cell continuously sends the corresponding uplink resource scheduling information to the base station where the high-interference cell is located.
5. And the base station where the high interference cell is located uses the baseband processing unit to continuously demodulate the uplink signal according to the uplink resource scheduling information of the adjacent cell 1, and simultaneously uses the uplink interference checking unit to detect the interference information of the high interference cell again, obtains a detection result, if the detection result is-115 dBm, and reports the intensity of the detected interference information to the network management server.
6. And the network management server compares the received interference information intensity with a preset interference information threshold, and if the interference information intensity of the adjacent cell 1 is minus 115dBm and is lower than the preset interference information threshold minus 105dBm, the network management server judges that the high-interference cell and the adjacent cell 1 are mutually interfered adjacent cell pairs, and finishes the same-frequency interference adjacent cell investigation to finish the positioning of the interfered adjacent cell pairs.
As shown in fig. 7, in one embodiment, a method for locating co-channel interference from a non-neighboring cell is provided, specifically as follows:
1. The base station uplink interference checking unit detects interference information of each cell in the station in real time, and periodically reports the detected interference information to the network management server. The reporting period can be set as required.
2. And the network management server receives the interference information periodically reported by the base station, if the two periods of the interference information of one cell are detected to be continuously higher than a preset interference information threshold, if the preset interference information threshold is-110 dbBm, the cell is determined to be a high-interference cell, the same-frequency interference neighbor cell checking flow aiming at the corresponding cell is started, an interference checking neighbor cell list is manufactured according to the neighbor cell list of the high-interference cell and neighbor cell geographic information, as shown in a table 1, and the manufactured table 1 is sent to the base station where the high-interference cell is located.
3. The base station where the high interference cell is located sends a request for obtaining uplink scheduling information to one of the neighbor cells in the interference check neighbor cell list, for example, sends a request for obtaining uplink scheduling information to the neighbor cell 1.
4. After receiving a request for acquiring uplink scheduling information sent by a base station, a neighboring cell 1 corresponding to a high-interference cell continuously sends the corresponding uplink resource scheduling information to the base station where the high-interference cell is located.
5. And the base station where the high interference cell is located uses the baseband processing unit to continuously demodulate the uplink signal according to the uplink resource scheduling information of the adjacent cell 1, and simultaneously uses the uplink interference checking unit to detect the interference information of the high interference cell again, obtains a detection result, if the detection result is-100 dBm, and reports the intensity of the detected interference information to the network management server.
6. And the network management server compares the received interference information intensity with a preset interference information threshold, if the interference information intensity of the adjacent cell 1 is 100dBm below the preset interference information threshold and 110dBm below the preset interference information threshold, judges that the high interference cell is opposite to the adjacent cell 1, deletes the adjacent cell 1 from the interference check adjacent cell list shown in the table 1, updates the interference check adjacent cell list shown in the table 2, and sends the updated interference check list to the base station where the high interference cell is located.
TABLE 2
Further, the above processes 1-6 are repeated, the neighboring cell 2 and the neighboring cell 3 are examined sequentially, the high interference cell carries out uplink signal demodulation continuously and simultaneously carries out interference information detection according to the corresponding neighboring cell uplink resource scheduling information, and if the detection results are higher than-110 dBm, the network management server judges that the high interference cell is not interfered with the neighboring cell 2 and the neighboring cell 3. And the gateway server sequentially deletes the checked neighbor cell 2 and the checked neighbor cell 3 from the interference check neighbor cell list, updates the interference check neighbor cell list, such as a table 3, and issues the list to the base station where the high interference cell is located again.
TABLE 3 Table 3
7. The base station where the high interference cell is located sends a request for obtaining uplink scheduling information to the nearest neighbor cell in the current interference checking neighbor cell list, for example, sends a request for obtaining uplink signal scheduling information to neighbor cell 4 in table 3.
8. After receiving a request for acquiring uplink scheduling information sent by a base station, a neighboring cell 4 corresponding to the high-interference cell continuously sends the corresponding uplink resource scheduling information to the base station where the high-interference cell is located.
9. And the base station where the high interference cell is located uses the baseband processing unit to continuously demodulate the uplink signal according to the uplink resource scheduling information of the adjacent cell 4, and simultaneously uses the uplink interference checking unit to detect the interference information of the high interference cell again, obtains a detection result, if the detection result is-105 dBm, and reports the intensity of the detected interference information to the network management server.
10. The network management server compares the received interference information intensity with a preset interference information threshold, wherein the received interference information intensity is-105 dBm and is higher than the preset interference information threshold-110 dBm, and the non-interference neighbor cell pair of the high-interference cell and the neighbor cell 4 is judged. After deleting the checked neighbor cell 4 in the interference check neighbor cell list, the network management server has no checked neighbor cell and sends out a high interference warning needing manual check.
As shown in fig. 8, in one embodiment, an apparatus for locating co-channel interference neighbors is provided, including:
and the demodulation module 810 is configured to demodulate the uplink interference signal of the high interference cell according to the obtained uplink resource scheduling information corresponding to the current neighboring cell, so as to obtain the demodulated interference signal strength.
In this embodiment, the demodulation module 810 is a module in a base station baseband processing unit, the baseband processing unit receives uplink resource scheduling information corresponding to a current neighboring cell issued by an uplink interference checking unit, and the demodulation module 810 demodulates an uplink interference signal of a high interference cell according to the uplink resource scheduling information corresponding to the current neighboring cell, and if demodulation is successful, obtains the strength of the demodulated interference signal.
The interference checking module 820 is configured to report the demodulated interference signal strength to the network management server, so that the network management server determines whether the current neighboring cell causes interference to the high interference cell according to a preset uplink interference signal strength threshold.
In this embodiment, the interference checking module 820 is a module in an uplink interference checking unit in the base station, when the baseband processing unit demodulates an uplink interference signal of a high interference cell according to uplink resource scheduling information of a neighboring cell, the interference checking module 820 in the uplink interference checking unit obtains the demodulated interference signal strength and reports the demodulated interference signal strength to the network management server, so that the network management server determines whether the current neighboring cell is an interference cell of the high interference cell according to a preset uplink interference signal strength threshold, thereby completing checking of the current neighboring cell.
In an embodiment, the uplink resource scheduling information includes a location of a terminal allocated with a resource in the current neighboring cell, and the demodulation module 810 is further configured to suspend, according to the location of the terminal allocated with the resource, a service corresponding to the location of the allocated resource in the high interference cell, and demodulate, by using the obtained uplink resource scheduling information of the current neighboring cell, the uplink signal corresponding to the location of the allocated resource, so as to obtain a corresponding interference signal strength.
In one embodiment, the demodulation unit 810 is further configured to demodulate an uplink signal corresponding to the location of the allocated resource by using the obtained uplink resource scheduling information of the current neighboring cell, and if the demodulation check code is correct after demodulation, then the current neighboring cell has a corresponding interference signal, and obtain a corresponding interference signal strength.
As shown in fig. 9, in an embodiment, the apparatus for locating co-channel interference neighbors further includes:
the detection reporting module 830 is configured to periodically detect and report interference information to the network management server, so that the network management server determines a high interference cell according to a preset interference information threshold, and generates an interference check neighboring cell set according to a neighboring cell and a neighboring cell position of the high interference cell.
In this embodiment, the detection reporting module 830 is a module in the base station uplink interference checking unit. The base station uplink interference checking unit detects interference information of each cell covered by the base station by using the detection reporting module 830, and periodically reports the interference information to the network management server, so that the network management server determines a corresponding high interference cell in the cells corresponding to the base station, and generates an interference checking neighbor set.
The first receiving module 840 is configured to receive the interference check neighbor set sent by the network management server.
A first sending module 850, configured to take one neighbor cell in the interference checking neighbor cell set as a current neighbor cell, and send a request for obtaining uplink resource scheduling information to the current neighbor cell.
In this embodiment, the first receiving module 840 and the first transmitting module 850 are modules in the uplink interference checking unit of the base station, and when the network management server generates an interference checking neighboring cell set corresponding to the high interference cell, the interference checking neighboring cell set is sent to the uplink interference checking unit of the base station, the first receiving module 840 receives the interference checking neighboring cell set sent by the network management server, and the first transmitting module 850 sends a request for acquiring uplink resource scheduling information to one of the cells according to the interference checking neighboring cell set.
As shown in fig. 10, in an embodiment, the apparatus for locating co-channel interference neighbors further includes:
the high interference cell detection module 860 is configured to report the interference information of the high interference cell in real time while demodulating the high interference cell, so that the network management server determines whether the interference information of the high interference cell is lower than a preset interference information threshold.
And the interference neighbor determination module 870 is configured to, if yes, cause the network management server to determine that the current neighbor causes interference to the high-interference cell, and stop interference neighbor investigation to the high-interference cell.
And the updating module 880 is configured to, if not, cause the network management server to delete the current neighbor cell in the interference rejection neighbor cell set and update the interference rejection neighbor cell set.
And the second receiving module 890 is configured to receive the updated interference check neighbor set sent by the network management server.
The second sending module 890A is configured to take one neighbor cell in the updated interference check neighbor cell set as a current neighbor cell, send a request for obtaining uplink resource scheduling information to the current neighbor cell, and enter the demodulating module 810 until the interference check neighbor cell set is empty.
In this embodiment, the high interference cell detection module 860, the interference neighbor determination module 870, and the update module 880 all belong to modules in the network management server, the network management server performs corresponding processing according to the message sent by the base station uplink interference checking unit, updates the interference checking neighbor set and sends the updated interference checking neighbor set to the second receiving module 890 in the base station uplink interference checking unit, and the second sending module 890A processes the current neighbor according to the updated interference checking neighbor set obtained by the second receiving module 890 until the interference checking neighbor set is empty.
Those skilled in the art will appreciate that implementing all or part of the processes of the methods of the embodiments described above may be accomplished by computer programs stored on a computer readable storage medium, such as a computer system, and executed by at least one processor in the computer system to implement processes including embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random-access Memory (Random Access Memory, RAM), or the like.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. A method of locating co-channel interfering neighbors, the method comprising:
demodulating an uplink interference signal of a high-interference cell according to uplink resource scheduling information corresponding to the current neighbor cell of the obtained high-interference cell to obtain the intensity of the demodulated interference signal; the high-interference cell is a cell with interference information higher than a preset interference information threshold;
reporting the demodulated interference signal strength to a network management server so that the network management server judges whether the current neighbor cell interferes with the high-interference cell according to a preset uplink interference signal strength threshold;
the step of demodulating the uplink interference signal of the high-interference cell according to the obtained uplink resource scheduling information corresponding to the current neighboring cell to obtain the intensity of the demodulated interference signal comprises the following steps:
acquiring uplink resource scheduling information of the current neighbor cell, wherein the uplink resource scheduling information comprises the position of a terminal allocated with resources for generating uplink signals in the current neighbor cell;
suspending the service of the position of the high interference cell corresponding to the allocated resource according to the position of the allocated resource of the terminal, and demodulating the uplink signal of the position of the corresponding allocated resource by utilizing the obtained uplink resource scheduling information of the current neighbor cell to obtain the corresponding interference signal intensity;
The step of demodulating the uplink interference signal of the high interference cell according to the obtained uplink resource scheduling information corresponding to the current neighboring cell to obtain the intensity of the demodulated interference signal comprises the following steps: periodically detecting and reporting interference information to a network management server, so that the network management server determines a high interference cell according to a preset interference information threshold, and generates an interference check neighbor set according to the neighbor of the high interference cell;
receiving an interference check neighbor set corresponding to the high interference cell sent by a network management server;
and taking one adjacent cell with the nearest relative geographic position in the interference check adjacent cell set as a current adjacent cell, and sending a request for acquiring uplink resource scheduling information to the current adjacent cell.
2. The method of claim 1, wherein the step of demodulating the uplink signal corresponding to the location of the allocated resource by using the obtained uplink resource scheduling information of the current neighbor cell, and obtaining the corresponding interference signal strength, comprises:
and demodulating the uplink signal corresponding to the position of the allocated resource by using the obtained uplink resource scheduling information of the current adjacent cell, and if the demodulation check code is correct after demodulation, obtaining the corresponding interference signal strength when the current adjacent cell has the corresponding interference signal.
3. The method of claim 1, wherein after the step of reporting the demodulated interference signal strength to a network management server to enable the network management server to determine whether the current neighboring cell causes interference to the high interference cell according to a preset uplink interference signal strength threshold, the method comprises:
reporting interference information of a high interference cell in real time while demodulating so that a network management server judges whether the interference information of the high interference cell is lower than a preset interference information threshold;
if yes, the network management server determines that the current neighboring cell interferes with the high-interference cell, and stops checking the interference neighboring cell of the high-interference cell;
if not, the network management server is enabled to delete the current neighbor cell in the interference check neighbor cell set and update the interference check neighbor cell set;
receiving an updated interference check neighbor set sent by a network management server, taking one neighbor in the updated interference check neighbor set as a current neighbor, sending a request for acquiring uplink resource scheduling information to the current neighbor, and carrying out demodulation on uplink interference signals of the high-interference cell according to the uplink resource scheduling information corresponding to the current neighbor of the acquired high-interference cell to obtain the intensity of the demodulated interference signals until the interference check neighbor set is empty.
4. An apparatus for locating co-channel interfering neighbors, the apparatus comprising:
the demodulation module is used for demodulating the uplink interference signal of the high-interference cell according to the uplink resource scheduling information corresponding to the current neighbor cell of the high-interference cell, so as to obtain the intensity of the demodulated interference signal; the high-interference cell is a cell with interference information higher than a preset interference information threshold;
the interference checking module is used for reporting the demodulated interference signal intensity to a network management server so that the network management server judges whether the current neighbor cell interferes with the high-interference cell according to a preset uplink interference signal intensity threshold;
the uplink resource scheduling information comprises the position of the allocated resource of the terminal generating the uplink signal in the current neighbor cell; the demodulation module is further used for suspending the service of the position of the allocated resource corresponding to the high-interference cell according to the position of the allocated resource of the terminal, and demodulating an uplink signal of the position of the allocated resource by utilizing the obtained uplink resource scheduling information of the current neighbor cell to obtain the corresponding interference signal intensity;
the apparatus further comprises:
the detection reporting module is used for periodically detecting and reporting interference information to the network management server so that the network management server determines a high-interference cell according to a preset interference information threshold and generates an interference check neighbor set according to the neighbor of the high-interference cell;
The first receiving module is used for receiving the interference check neighbor cell set corresponding to the high interference cell sent by the network management server;
and the first sending module is used for taking one adjacent cell with the nearest relative geographic position in the interference check adjacent cell set as a current adjacent cell and sending a request for acquiring uplink resource scheduling information to the current adjacent cell.
5. The apparatus of claim 4, wherein the demodulation unit is further configured to demodulate an uplink signal corresponding to a location where the resource is allocated by using the obtained uplink resource scheduling information of the current neighboring cell, and if it is determined that the demodulation check code is correct after demodulation, then the current neighboring cell has a corresponding interference signal, and obtain a corresponding interference signal strength.
6. The apparatus of claim 4, wherein the apparatus further comprises:
the high interference cell detection module is used for reporting the interference information of the high interference cell in real time while demodulating so that the network management server judges whether the interference information of the high interference cell is lower than a preset interference information threshold or not;
the interference neighbor cell determining module is used for enabling the network management server to determine that the current neighbor cell causes interference to the high-interference cell and stopping the interference neighbor cell investigation of the high-interference cell if the current neighbor cell causes interference to the high-interference cell;
The updating module is used for enabling the network management server to delete the current neighbor cell in the interference check neighbor cell set and updating the interference check neighbor cell set if not;
the second receiving module is used for receiving the updated interference check neighbor set sent by the network management server;
and the second sending module is used for taking one neighbor cell in the updated interference check neighbor cell set as a current neighbor cell, sending a request for acquiring uplink resource scheduling information to the current neighbor cell, and carrying out the step of demodulating the uplink interference signal of the high interference cell according to the uplink resource scheduling information corresponding to the acquired current neighbor cell of the high interference cell to obtain the intensity of the demodulated interference signal until the interference check neighbor cell set is empty.
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