CN114698011A - Method and device for preventing interference between small stations - Google Patents
Method and device for preventing interference between small stations Download PDFInfo
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- CN114698011A CN114698011A CN202011588847.8A CN202011588847A CN114698011A CN 114698011 A CN114698011 A CN 114698011A CN 202011588847 A CN202011588847 A CN 202011588847A CN 114698011 A CN114698011 A CN 114698011A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention provides a method and a device for preventing interference between small stations, wherein the method comprises the following steps: establishing a plurality of cell sites; respectively determining a full-bandwidth interference noise value of each small station and a signal quality measurement result of a user terminal in a coverage cell of each small station; determining a target small station with same frequency interference in the plurality of small stations, wherein the target small station is a small station of which the full-bandwidth interference noise value meets a first preset condition and/or the signal quality measurement result meets a second preset condition; and switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station in the plurality of small stations. In the embodiment of the invention, the working frequency points among the plurality of small stations are different from each other by carrying out the same frequency interference detection on the plurality of small stations and reselecting new working frequency points for the corresponding small stations, so that the same frequency interference among the plurality of small stations is prevented, and the communication quality of the small stations is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to an interference preventing method and device between small stations.
Background
With the rapid development of the mobile internet, the number of mobile users has also sharply increased. In order to meet the communication requirement of the mobile user, more base stations need to be established to realize the full coverage of the network. However, for some remote areas or urban areas where the position quality coverage blocked by buildings is weak or no signal coverage exists, daily communication can be met, but for scenes with high communication quality requirements (such as application communication scenes for rescue and relief work) the use requirements cannot be met.
In the related art, a portable small station is provided, namely, a rapid small station deployment system (called a small station for short) integrates the functions of a base station, a core network, a scheduling system and the like, and has the characteristics of integration and miniaturization. The method is suitable for emergency communication scenes which need to be deployed quickly and are not wide in coverage area, such as emergency communication, emergency communication for rescue and relief work and the like in the public safety industry, and can provide broadband cluster communication services such as voice, scheduling, data transmission, video monitoring and the like for a task site.
However, the portable small stations are physically independent, inter-station cooperation cannot be performed among a plurality of small stations, if the multi-small-station networking is used, after the multi-small-station startup frequency sweeping, the external neighboring cell can generate serious interference on the uplink service of the small station, and the downlink service of the multi-small-station can also generate same frequency interference, so that the communication quality of a small-station signal coverage area is poor.
Disclosure of Invention
The embodiment of the invention provides an interference preventing method and device between small stations, and aims to solve the technical problems that after a plurality of small stations are started and swept in the prior art, the external adjacent cell can generate serious interference on uplink services of the small stations, and the downlink services of the plurality of small stations can also generate same-frequency interference, so that the communication quality of a signal coverage area of the small stations is poor.
In a first aspect, an embodiment of the present invention provides a method for preventing interference between small stations, including:
establishing a plurality of cell sites;
respectively determining a full-bandwidth interference noise value of each small station and a signal quality measurement result of a user terminal in a coverage cell of each small station;
determining a target small station with co-channel interference in the plurality of small stations, wherein the target small station is a small station of which the full-bandwidth interference noise value meets a first preset condition and/or the signal quality measurement result meets a second preset condition;
and switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station in the plurality of small stations.
Optionally, the switching the current working frequency point of the cell of the target cell to a new working frequency point includes:
the target small station scans a pre-established working frequency point list;
and selecting a frequency point different from the cell working frequency points of the plurality of small stations from the working frequency point list as a new working frequency point of the target small station.
Optionally, the determining a full bandwidth interference noise value of each small station includes:
acquiring an interference noise value of an uplink signal of each cell;
and determining the full-bandwidth interference noise value of each small station every other preset period according to the interference noise value of the uplink signal of each small station cell.
Optionally, the determining a target small station among the plurality of small stations, where the target small station satisfies a first preset condition for a full-bandwidth interference noise value, includes:
and determining the small stations with the full-bandwidth interference noise values larger than a first preset threshold value in the corresponding preset time as target small stations, wherein the preset time corresponding to different small stations is different.
Optionally, the determining a signal quality measurement result of a user terminal in a coverage cell of each cell includes:
each cell sends common-frequency measurement control information to a user terminal in a current serving cell, so that the user terminal respectively measures Reference Signal Receiving Power (RSRP) of the current serving cell and an adjacent cell where the user terminal is located after Receiving the common-frequency measurement control information, and sends indication information to a corresponding cell when the RSRP of the adjacent cell is greater than the RSRP of the current serving cell, wherein the indication information comprises the RSRP of the current serving cell and the adjacent cell where the user terminal is located;
according to the received indication information, determining the signal quality measurement result of the user terminal in the cell covered by each small station, wherein the signal quality measurement result comprises the following steps: and each small station receives the times of the indication information and the RSRP difference value between the adjacent cell and the current service cell in the indication information.
Optionally, the determining a target small station among the plurality of small stations, where the target small station is a small station whose signal quality measurement result satisfies a second preset condition, includes:
and determining the small station with the times of receiving the indication information larger than a second preset threshold and the RSRP difference larger than a third preset threshold as a target small station.
In a second aspect, an embodiment of the present invention provides an inter-cell interference preventing device, including:
the system comprises an establishing module, a judging module and a judging module, wherein the establishing module is used for establishing a plurality of small station cells;
a determining module, configured to determine a full-bandwidth interference noise value of each cell and a signal quality measurement result of a user terminal in a cell covered by each cell;
the determining module is further configured to determine a target small station with co-channel interference among the plurality of small stations, where the target small station is a small station whose full-bandwidth interference noise value meets a first preset condition and/or whose signal quality measurement result meets a second preset condition;
and the switching module is used for switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station in the plurality of small stations.
In a third aspect, an embodiment of the present invention provides an electronic device, including: at least one processor and memory;
the memory stores computer execution instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the inter-cell interference prevention method as described above in the first aspect and in various possible designs of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where computer-executable instructions are stored, and when a processor executes the computer-executable instructions, the method for preventing interference between small stations according to the first aspect and various possible designs of the first aspect is implemented.
In a fifth aspect, embodiments of the present invention provide a computer program product comprising a computer program that, when executed by a processor, implements the inter-cell interference prevention method as described in the first aspect above and in various possible designs of the first aspect.
The method and the device for preventing interference between the small stations provided by the embodiment of the invention have the advantages that a plurality of small station cells are established; then respectively determining the full-bandwidth interference noise value of each small station and the signal quality measurement result of the user terminal in the coverage cell of each small station; further determining a target small station with co-frequency interference in the plurality of small stations, wherein the target small station is a small station of which the full-bandwidth interference noise value meets a first preset condition and/or the signal quality measurement result meets a second preset condition; and switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station in the plurality of small stations. In the embodiment of the invention, the co-frequency interference detection is carried out on a plurality of small stations, and the corresponding small stations reselect new working frequency points, so that the working frequency points among the plurality of small stations are different from each other, the co-frequency interference among the plurality of small stations is prevented, and the communication quality of small station cells is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an application scenario diagram of an inter-cell interference prevention method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of an inter-cell interference prevention method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of an inter-cell interference prevention method according to another embodiment of the present invention;
fig. 4 is a schematic flow chart of an inter-cell interference prevention method according to another embodiment of the present invention;
fig. 5 is an application scenario diagram of an inter-cell interference prevention method according to another embodiment of the present invention;
fig. 6 is an application scenario diagram of an inter-cell interference prevention method according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of an inter-cell interference preventing device according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a hardware structure of an electronic device according to an 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 and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With the rapid development of the mobile internet, the number of mobile users has also sharply increased. In order to meet the communication requirement of the mobile user, more base stations need to be established to realize the full coverage of the network. However, for some remote areas or urban areas where the position quality coverage blocked by buildings is weak or no signal coverage exists, daily communication can be met, but for scenes with high communication quality requirements (such as application communication scenes for rescue and relief work) the use requirements cannot be met.
In the related art, a portable small station is provided, namely, a rapid small station deployment system (called a small station for short) integrates the functions of a base station, a core network, a scheduling system and the like, and has the characteristics of integration and miniaturization. The method is suitable for emergency communication scenes which need to be deployed quickly and are not wide in coverage area, such as emergency communication, emergency communication for rescue and relief work and the like in the public safety industry, and can provide broadband cluster communication services such as voice, scheduling, data transmission, video monitoring and the like for a task site.
However, the portable small stations are physically independent, inter-station cooperation cannot be performed among a plurality of small stations, if the multi-small-station networking is used, after the multi-small-station startup frequency sweeping, the external neighboring cell can generate serious interference on the uplink service of the small station, and the downlink service of the multi-small-station can also generate same frequency interference, so that the communication quality of a small-station signal coverage area is poor.
Aiming at the defect, the technical concept provided by the application is as follows: establishing a plurality of cell sites; then respectively determining the full-bandwidth interference noise value of each small station and the signal quality measurement result of the user terminal in the coverage cell of each small station; further determining a target small station with co-frequency interference in the plurality of small stations, wherein the target small station is a small station of which the full-bandwidth interference noise value meets a first preset condition and/or the signal quality measurement result meets a second preset condition; and switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station in the plurality of small stations. In the embodiment of the invention, the working frequency points among the plurality of small stations are different from each other by carrying out the same frequency interference detection on the plurality of small stations and reselecting new working frequency points for the corresponding small stations, so that the same frequency interference among the plurality of small stations is prevented, and the communication quality of the small stations is improved.
Fig. 1 is an application scenario diagram of an inter-cell interference prevention method according to an embodiment of the present invention.
As shown in fig. 1, the application scenario provided in this embodiment is a scenario in which a plurality of small stations (for example, four small stations a, b, c, and d) are networked, a user terminal is provided in a serving cell corresponding to each small station, when the four small stations are powered on, respective working frequency points are selected by scanning, external and neighboring co-frequency interference may cause severe interference to uplink services of the small stations, and when the working frequency points of the four small stations are the same, co-frequency interference may also be generated in downlink signals between the small stations.
Fig. 2 is a schematic flow chart of an inter-cell interference prevention method according to an embodiment of the present invention, where an execution main body of the method according to this embodiment may be a base station server or a cell in the embodiment shown in fig. 1.
As shown in fig. 2, the method provided by the present embodiment may include the following steps.
S201, a plurality of small station cells are established.
Specifically, a plurality of small stations are arranged near an area where a network needs to be deployed for networking, and a service cell coverage area of each small station is respectively arranged, so that signals of the plurality of small stations can cover the area where the network needs to be deployed.
Illustratively, as shown in fig. 5, four small stations are arranged in an area where a network needs to be deployed, and the signal coverage area of each small station is a circular area with a radius r and a small station as a center.
S202, respectively determining the full bandwidth interference noise value of each small station and the signal quality measurement result of the user terminal in the coverage cell of each small station.
Specifically, there are two scenarios of co-frequency interference between multiple cells, the first scenario is that co-frequency interference exists between the external world and the uplink signal of the neighboring cell of each cell, and the second scenario is that co-frequency interference exists between the downlink signals of multiple cells. For the first scenario, whether uplink co-channel interference exists in the small stations is judged through the full-bandwidth interference of each small station; for the second scenario, it is necessary to determine whether downlink co-channel interference exists between the cells according to the signal quality of the cell measured by the user terminal in each cell. Therefore, in order to prevent uplink and downlink co-channel interference between small stations in this embodiment, it is necessary to determine a full-bandwidth interference noise value of each small station and a signal quality measurement result of a user terminal in a cell covered by each small station.
It should be noted that the small station has a noise monitoring function, and the full-bandwidth interference noise value of the small station can be obtained by directly monitoring the small station.
S203, determining a target small station with co-frequency interference in the plurality of small stations, wherein the target small station is a small station of which the full-bandwidth interference noise value meets a first preset condition and/or the signal quality measurement result meets a second preset condition.
Specifically, a target small station with co-frequency interference is determined in a plurality of small stations according to a full-bandwidth interference noise value of each small station and/or a signal quality measurement result of a user terminal in a cell covered by each small station, wherein the small station with the full-bandwidth interference noise value meeting a first preset condition is the target small station with uplink co-frequency interference and/or the small station with the signal quality measurement result meeting a second preset condition is the target small station with downlink co-frequency interference.
Illustratively, if the full-bandwidth interference noise value of a small station in a period of time is greater than a first preset threshold value in a plurality of small stations, it indicates that there is uplink co-channel interference between the small station and other small stations, and therefore it is necessary to reselect the working frequency point of the small station.
And S204, switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station in the plurality of small stations.
Specifically, after each small station is started up, a working frequency band list is automatically scanned to select working frequency points, and when the same frequency interference of the target small station is determined through the steps, the target small station automatically triggers frequency sweeping again to select a new working frequency point different from the working frequency points of other small stations, so that the same frequency interference of other small stations is avoided.
It should be noted that the working frequency point list is planned for the small stations in advance and stored in each small station, and the planning process of the specific working frequency point list may refer to the related art.
In this embodiment, a plurality of cell sites are established; then respectively determining the full-bandwidth interference noise value of each small station and the signal quality measurement result of the user terminal in the coverage cell of each small station; further determining a target small station with co-frequency interference in the plurality of small stations, wherein the target small station is a small station of which the full-bandwidth interference noise value meets a first preset condition and/or the signal quality measurement result meets a second preset condition; and switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station in the plurality of small stations. In the embodiment of the invention, the working frequency points among the plurality of small stations are different from each other by carrying out the same frequency interference detection on the plurality of small stations and reselecting new working frequency points for the corresponding small stations, so that the same frequency interference among the plurality of small stations is prevented, and the communication quality of the small stations is improved.
In order to better understand the present application, on the basis of the embodiment shown in fig. 2, the following describes separately the implementation methods for preventing two application scenarios, i.e., uplink co-channel interference and downlink co-channel interference.
Fig. 3 is a schematic flow chart of an inter-cell interference prevention method according to another embodiment of the present invention, where the scenario of the inter-cell interference prevention method according to the embodiment is external and neighboring cell uplink co-channel interference.
As shown in fig. 3, the method provided by the present embodiment may include the following steps.
S301, a plurality of small station cells are established.
Specifically, a plurality of small stations are arranged near an area where a network needs to be deployed for networking, and a service cell coverage area of each small station is respectively arranged, so that signals of the plurality of small stations can cover the area where the network needs to be deployed.
Illustratively, as shown in fig. 5, four small stations, namely a small station a, a small station B, a small station C and a small station D, are arranged in an area where a network needs to be deployed, and a cell signal coverage area of each small station is a circular area with the small station as a center and with r as a radius.
S302, obtaining the interference noise value of the uplink signal of each small station cell.
And S303, determining the full-bandwidth interference noise value of each small station every preset period according to the interference noise value of the uplink signal of each small station cell.
Specifically, the small stations have the function of detecting interference noise, and each small station performs resource block RB level interference noise statistics, wherein the resource blocks are the minimum units of resource allocation frequency domains for data transmission of the physical layer. After the interference noise value of the uplink signal of each small station is counted, the full-bandwidth interference noise value of each small station is periodically calculated, and the preset period may be, but is not limited to, 1 second, that is, the full-bandwidth interference noise value of the small station is calculated every 1 second.
S304, determining the small stations with the full-bandwidth interference noise values larger than a first preset threshold value in the corresponding preset time as target small stations, wherein the preset time corresponding to different small stations is different.
Specifically, a preset time is preset for each small station, a value range of the preset time may be {0, 20s, 40s, 60s, 80s }, and the preset time corresponding to each small station is different, for example, the preset time corresponding to the small station a in fig. 5 is 20s, the preset time corresponding to the small station B is 40s, the preset time corresponding to the small station C is 60s, the preset time corresponding to the small station D is 80s, and the like.
Further, for each small station, whether all full-bandwidth interference noise values determined within the corresponding preset time are all larger than a first preset threshold value is judged, if yes, it is indicated that uplink co-frequency interference exists between the small station and other small stations, and the small station is determined as a target small station. For example, if the full-bandwidth interference noise value calculated by the small station a every 1s within the preset time of 20s is greater than the first preset threshold, it indicates that the small station a is subjected to uplink co-channel interference of the outside or other small stations, and the interference is serious, and the small station a is determined as the target small station.
Wherein the first preset threshold may be set to-100 dBm.
S305, switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station.
Specifically, after a target cell which is subjected to uplink co-channel interference and has a relatively high interference degree is determined, the target cell is triggered to automatically scan a working frequency point list again, and a frequency point different from the cell working frequency points of the plurality of cells is selected from the working frequency point list to serve as a new working frequency point of the target cell. Then, the target cell provides communication service by using the new working frequency point.
Furthermore, uplink co-frequency interference detection is continuously carried out on the plurality of small stations, the detected small stations are all switched to new frequency points different from the working frequency points of other small stations to work, and finally the working frequency points of the plurality of small stations are all different, so that the uplink co-frequency interference among the plurality of small stations is prevented.
For example, referring to fig. 5 and 6, assuming that the frequency points of the work started by the small stations A, B, C and D are the same, each circle in fig. 6 represents a small station and is respectively marked as a-1, B-1, C-1 and D-1, wherein the letters A, B, C and D respectively represent four small stations, the numbers behind the letters identify the numbers of the work frequency points, the numbers of the work frequency points are the same, the numbers of the work frequency points are different, and the numbers of the work frequency points represent the same, for example, the four circles in the first column from left to right in fig. 6 are respectively a-1, B-1, C-1 and D-1, which represent that the numbers of the work frequency points of the small stations A, B, C and D are all 1, and represent that the work frequency points of the four small stations are the same. After the four small stations are subjected to uplink co-frequency interference detection by the method, the fact that uplink co-frequency interference exists between the small station D and other small stations is found, the small station D triggers an automatic scanning working frequency point list to select a new working frequency point different from the working frequency points of other small stations, the number of the new working frequency point is 2, the four small stations after the frequency point is switched are shown as the second row in the figure 6, and the four small stations are marked as A-1, B-1, C-1 and D-2 respectively. Then, the working frequency point of the small station C is switched to the working frequency point with the number of 3 by the same method, and as shown in the third column in fig. 6, the four small stations are a-1, B-1, C-3 and D-2, respectively. And continuously detecting and switching the working frequency point of the small station B into the working frequency point with the number of 4, wherein as shown in the fourth column in FIG. 6, four small stations are respectively A-1, B-4, C-3 and D-2, so that the working frequency points of each small station in the networking scene of the four small stations are different, and the problem of uplink same-frequency interference in the networking scene of multiple small stations is avoided.
Fig. 4 is a flowchart illustrating an interference prevention method between small stations according to another embodiment of the present invention, where the method provided in this embodiment aims at downlink co-channel interference between multiple small stations.
As shown in fig. 4, the method provided by the present embodiment may include the following steps.
S401, a plurality of small station cells are established.
Specifically, a plurality of small stations are arranged near an area where a network needs to be deployed for networking, and a service cell coverage area of each small station is respectively arranged, so that signals of the plurality of small stations can cover the area where the network needs to be deployed.
Illustratively, as shown in fig. 5, four small stations, namely a small station a, a small station B, a small station C and a small station D, are arranged in an area where a network needs to be deployed, and a cell signal coverage area of each small station is a circular area with the small station as a center and with r as a radius.
S402, each cell sends co-frequency measurement control information to a user terminal in a current service cell, so that the user terminal respectively measures Reference Signal Received Powers (RSRPs) of the current service cell and an adjacent cell where the user terminal is located after receiving the co-frequency measurement control information, and sends indication information to a corresponding cell when the RSRP of the adjacent cell is greater than the RSRP of the current service cell, wherein the indication information comprises the RSRPs of the current service cell and the adjacent cell where the user terminal is located.
Specifically, each cell sends common-frequency measurement control information to the user terminal in each cell, after receiving the common-frequency measurement control information, the user terminal starts to detect reference signal received power RSRP of the current serving cell and the neighboring cell, if the RSRP of the neighboring cell is greater than the RSRP of the current serving cell, it is indicated that the signal quality of the neighboring cell is better than that of the serving cell, this event is referred to as an A3 event, and when a time of A3 occurs, the user terminal sends indication information to the current serving cell once (that is, reports an A3 event to the serving cell of the user terminal once), and the indication information includes the RSRP of the current serving cell and the neighboring cell where the user terminal is located.
S403, determining the signal quality measurement result of the user terminal in the cell covered by every small station according to the received indication information, wherein the signal quality measurement result comprises: and each small station receives the number of times of the indication information and the RSRP difference value between the adjacent cell and the current service cell in the indication information.
Specifically, the small station counts the number of times of receiving the indication information sent by the user terminal (i.e., counts the number of times of reporting the event a 3), and calculates the RSRP difference between the neighboring cell and the serving cell (i.e., subtracting the RSRP of the current serving cell from the RSRP of the neighboring cell) according to each received indication information.
S404, determining the small station with the frequency of receiving the indication information larger than a second preset threshold value and the RSRP difference larger than a third preset threshold value as a target small station.
Specifically, a second preset threshold (i.e., a frequency upper limit) is preset for each small station, a value range of the second preset threshold may be {0, 20, 40, 60, 80}, and the second preset thresholds corresponding to each small station are different, for example, the second preset threshold corresponding to the small station a in fig. 5 is 20 times, the second preset threshold corresponding to the small station B is 40 times, the second preset threshold corresponding to the small station C is 60 times, the second preset threshold corresponding to the small station D is 80 times, and the like. Further, according to a second preset threshold corresponding to the small station, the small station compares the counted times of the received indication information with the second preset threshold, and simultaneously compares the RSRP difference with a third preset threshold, if the times of the received indication information is greater than the second preset threshold, and simultaneously the RSRP difference is greater than the third preset threshold, it indicates that the small station is subjected to downlink co-frequency interference, and therefore, the small station is determined to be a target small station and needs to reselect a working frequency point for the small station.
S405, switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station.
Specifically, after a target cell which is subjected to downlink co-frequency interference and has a relatively high interference degree is determined, the target cell is triggered to automatically scan a working frequency point list again, and a frequency point different from the cell working frequency points of the plurality of cells is selected from the working frequency point list to serve as a new working frequency point of the target cell. Then, the target cell provides communication service by using the new working frequency point.
Furthermore, uplink co-frequency interference detection is continuously carried out on the plurality of small stations, the detected small stations are all switched to new frequency points different from the working frequency points of other small stations to work, and finally the working frequency points of the plurality of small stations are all different, so that the uplink co-frequency interference among the plurality of small stations is prevented.
For example, as shown in fig. 5, a serving cell where a user terminal is currently located is a cell a, neighboring cells are cells of cells B and C, respectively, and it is assumed that the cell a measures that RSRP of the cell a is smaller than RSRP of the cells B and C, which indicates that signal quality of the cells B and C is better than that of the cell a, the user terminal sends an indication message to the cell a once, the user terminal measures the cell a once at intervals, if the number of times that the cell a receives an A3 event reported by the user terminal is 30 times, and a second preset threshold corresponding to the cell a is 20 times, and the cell a calculates, according to an A3 event reported by the user terminal, that a difference value of RSRP is greater than a third preset threshold, which indicates that the cell a is subjected to downlink co-frequency interference of the cells B and C, so that the cell a automatically scans a work frequency point list and selects a new work frequency point. Further, downlink co-frequency interference detection is continuously performed on a plurality of small stations until the working frequency points of all the small stations are different, and the final effect is similar to that in fig. 6.
Fig. 7 is a schematic structural diagram of an inter-cell interference preventing device according to an embodiment of the present invention.
As shown in fig. 7, the apparatus provided in this embodiment includes: a building module 701, a determining module 702 and a switching module 703; the establishing module 701 is configured to establish a plurality of cell sites; a determining module 702, configured to determine a full bandwidth interference noise value of each cell and a signal quality measurement result of a user terminal in a cell covered by each cell; the determining module is further configured to determine a target small station with co-channel interference among the plurality of small stations, where the target small station is a small station whose full-bandwidth interference noise value meets a first preset condition or whose signal quality measurement result meets a second preset condition; a switching module 703, configured to switch a current working frequency point of a cell of the target cell to a new working frequency point, where the new working frequency point is different from working frequency points of cells of other cells except the target cell in the plurality of cells.
Further, the switching module is specifically configured to:
the target small station scans a pre-established working frequency point list;
and selecting a frequency point different from the cell working frequency points of the plurality of small stations from the working frequency point list as a new working frequency point of the target small station.
Further, the determining module is specifically configured to:
acquiring an interference noise value of an uplink signal of each cell;
and determining the full-bandwidth interference noise value of each small station every other preset period according to the interference noise value of the uplink signal of each small station cell.
Further, the determining module is specifically configured to:
and determining the small stations with the full-bandwidth interference noise values larger than a first preset threshold value in the corresponding preset time as target small stations, wherein the preset time corresponding to different small stations is different.
Further, the determining module is specifically configured to:
each cell sends common-frequency measurement control information to a user terminal in a current service cell, so that the user terminal respectively measures Reference Signal Received Power (RSRP) of the current service cell where the user terminal is located and Reference Signal Received Power (RSRP) of an adjacent cell after receiving the common-frequency measurement control information, and sends indication information to a corresponding cell when the RSRP of the adjacent cell is greater than the RSRP of the current service cell, wherein the indication information comprises the RSRP of the current service cell where the user terminal is located and the RSRP of the adjacent cell;
according to the received indication information, determining the signal quality measurement result of the user terminal in the cell covered by each small station, wherein the signal quality measurement result comprises the following steps: and each small station receives the number of times of the indication information and the RSRP difference value between the adjacent cell and the current service cell in the indication information.
Further, the determining module is specifically configured to:
and determining the small station with the frequency of receiving the indication information larger than a second preset threshold value and the RSRP difference larger than a third preset threshold value as a target small station.
The apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 8 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention. As shown in fig. 8, the electronic apparatus 80 of the present embodiment includes: a processor 801 and a memory 802; wherein
A memory 802 for storing computer-executable instructions;
the processor 801 is configured to execute the computer-executable instructions stored in the memory to implement the steps performed by the method in the above-described embodiments. Reference may be made in particular to the description relating to the method embodiments described above.
Alternatively, the memory 802 may be separate or integrated with the processor 801.
When the memory 802 is provided separately, the electronic device further includes a bus 803 for connecting the memory 802 and the processor 801.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the method for preventing interference between small stations is implemented as described above.
An embodiment of the present invention further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for preventing interference between small stations is implemented.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to implement the solution of the embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions to enable an electronic device (which may be a personal computer, a server, or a network device) or a processor to execute some steps of the methods described in the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art 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 (10)
1. A method for preventing interference between small stations is characterized by comprising the following steps:
establishing a plurality of small station cells;
respectively determining a full-bandwidth interference noise value of each small station and a signal quality measurement result of a user terminal in a coverage cell of each small station;
determining a target small station with co-channel interference in the plurality of small stations, wherein the target small station is a small station of which the full-bandwidth interference noise value meets a first preset condition and/or the signal quality measurement result meets a second preset condition;
and switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station in the plurality of small stations.
2. The method according to claim 1, wherein the switching the current working frequency point of the cell of the target cell to a new working frequency point comprises:
the target small station scans a pre-established working frequency point list;
and selecting a frequency point different from the cell working frequency points of the plurality of small stations from the working frequency point list as a new working frequency point of the target small station.
3. The method of claim 1 or 2, wherein determining the full bandwidth interference noise value for each small station comprises:
acquiring an interference noise value of an uplink signal of each cell;
and determining the full-bandwidth interference noise value of each small station every other preset period according to the interference noise value of the uplink signal of each small station cell.
4. The method according to claim 3, wherein the determining a target small station among the plurality of small stations, the target small station satisfying a first preset condition for a full-bandwidth interference noise value comprises:
and determining the small stations of which the corresponding full-bandwidth interference noise values determined within the preset time are all larger than a first preset threshold value as target small stations, wherein the preset time corresponding to different small stations is different.
5. The method of claim 1 or 2, wherein the determining the signal quality measurements of the user terminals in each cell covered by the small station comprises:
each cell sends common-frequency measurement control information to a user terminal in a current service cell, so that the user terminal respectively measures Reference Signal Received Power (RSRP) of the current service cell and an adjacent cell where the user terminal is located after receiving the common-frequency measurement control information, and sends indication information to a corresponding cell when the RSRP of the adjacent cell is greater than the RSRP of the current service cell, wherein the indication information comprises the RSRP of the current service cell and the adjacent cell where the user terminal is located;
according to the received indication information, determining the signal quality measurement result of the user terminal in the cell covered by each small station, wherein the signal quality measurement result comprises the following steps: and each small station receives the number of times of the indication information and the RSRP difference value between the adjacent cell and the current service cell in the indication information.
6. The method according to claim 5, wherein the determining a target small station among the plurality of small stations, the target small station being a small station whose signal quality measurement result satisfies a second preset condition, comprises:
and determining the small station with the frequency of receiving the indication information larger than a second preset threshold value and the RSRP difference larger than a third preset threshold value as a target small station.
7. An inter-cell interference prevention device, comprising:
the system comprises an establishing module, a sending module and a receiving module, wherein the establishing module is used for establishing a plurality of small station cells;
a determining module, configured to determine a full-bandwidth interference noise value of each cell and a signal quality measurement result of a user terminal in a cell covered by each cell;
the determining module is further configured to determine a target small station with co-channel interference among the plurality of small stations, where the target small station is a small station whose full-bandwidth interference noise value meets a first preset condition or whose signal quality measurement result meets a second preset condition;
and the switching module is used for switching the current working frequency point of the cell of the target small station into a new working frequency point, wherein the new working frequency point is different from the working frequency points of the cells of other small stations except the target small station.
8. An electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the inter-cell interference prevention method of any of claims 1 to 6.
9. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, implement the inter-cell interference prevention method of any one of claims 1 to 6.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the inter-cell interference prevention method of any one of claims 1 to 6.
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