CN117119511A

CN117119511A - Root Sequence Index (RSI) conflict processing method, server and storage medium

Info

Publication number: CN117119511A
Application number: CN202210529037.8A
Authority: CN
Inventors: 唐琳; 龚澍; 冯红; 柯雅珠
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2023-11-24
Also published as: WO2023221555A1

Abstract

The embodiment of the invention provides a method for processing Root Sequence Index (RSI) conflict, a server and a storage medium, and belongs to the technical field of communication. The method comprises the following steps: determining at least one suspicious cell, and determining each suspicious cell as a service cell in turn, wherein the suspicious cell is a cell with an overlapping coverage area with a neighboring cell, and the suspicious cell is a cell with a coverage radius larger than a preset coverage radius threshold; and carrying out RSI conflict detection on each service cell according to the preset engineering parameter table and the measurement report data corresponding to each service cell to obtain a conflict cell set of each service cell. According to the technical scheme provided by the embodiment of the invention, each suspicious cell is sequentially determined as the service cell, and then the root sequence index conflict detection is carried out on the service cell according to the measurement report data and the engineering parameter table, so that the detection of cells of the whole network is not needed, the method is suitable for the scene of all root sequence index conflicts, and the efficiency and the accuracy of the root sequence index conflict detection are improved.

Description

Root Sequence Index (RSI) conflict processing method, server and storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method, a server, and a storage medium for processing a root sequence index RSI conflict.

Background

In a wireless network, when a plurality of geographic position adjacent cells use the same PRACH time domain, frequency domain and code domain resources, root sequence index (Root Sequence Index, RSI) conflict is generated, and when a user terminal uses the same PRACH time-frequency code resources to initiate random access in a current cell, call false alarms are generated for other adjacent cells, and the wireless communication rate of other adjacent cells is affected. Therefore, it is important to detect whether or not an RSI collision detection occurs in a cell in time.

Existing RSI collision detection schemes generally include an RSI collision detection scheme based on neighbor lists and an RSI detection scheme based on X2/Xn-port messages. The RSI conflict detection mode based on the neighbor list cannot be applied to RSI conflict scenes of non-neighbor cells, the RSI detection mode based on the X2/Xn port message cannot be applied to scenes where the service base station and other base stations do not establish an X2/Xn interface, and therefore the two RSI conflict detection modes cannot be applied to scenes of all RSI conflict detection, and accuracy of root sequence index conflict detection is reduced. In addition, due to various reasons such as the small number of user terminals in a certain cell or the position distribution of the user terminals, even if the same PRACH time-frequency code resource is used by the adjacent cells in the geographic position, the other cell can not generate a call false alarm, and RSI conflict detection and optimization are not needed in the situation; the two RSI collision detection methods need to detect cells in the whole network, so that the efficiency of RSI collision detection is reduced.

Therefore, how to improve the efficiency and accuracy of root sequence index collision detection is a problem to be solved.

Disclosure of Invention

The main purpose of the embodiment of the invention is to provide a processing method, a server and a storage medium for Root Sequence Index (RSI) conflict, which are used for sequentially determining each suspicious cell as a service cell, and then carrying out root sequence index conflict detection on the service cell according to measurement report data and an engineering parameter table, so that the cells of the whole network are not required to be detected, and the method, the server and the storage medium are suitable for the scenes of all root sequence index conflicts, and improve the efficiency and the accuracy of root sequence index conflict detection.

In a first aspect, an embodiment of the present invention provides a method for processing a root sequence index RSI conflict, including:

determining at least one suspicious cell, and sequentially determining each suspicious cell as a service cell, wherein the suspicious cell is a cell with an overlapping coverage area with an adjacent cell or the suspicious cell is a cell with a coverage radius larger than a preset coverage radius threshold; and detecting RSI conflict of each service cell according to measurement report data corresponding to each service cell in a preset engineering parameter table, and obtaining a cell which generates RSI conflict with each service cell.

In a second aspect, an embodiment of the present invention further provides a server, where the server includes a processor, a memory, a computer program stored on the memory and executable by the processor, and a data bus for implementing a connection communication between the processor and the memory, where the computer program when executed by the processor implements a method for processing root sequence index RSI conflicts as described above.

In a third aspect, an embodiment of the present invention further provides a storage medium, for storing a computer readable storage, where the storage medium stores one or more programs, where the one or more programs are executable by one or more processors to implement the steps of a method for processing a root sequence index RSI conflict as provided in the specification of the present invention.

The embodiment of the invention provides a processing method, a server and a storage medium for Root Sequence Index (RSI) conflict, wherein by determining at least one suspicious cell and sequentially determining each suspicious cell as a service cell, the RSI conflict detection can be carried out on the cells with overlapping coverage areas with adjacent cells or the cells with the coverage radius larger than a preset coverage radius threshold value, the detection of the cells of the whole network is not needed, and the RSI conflict detection efficiency is improved; and carrying out RSI conflict detection on each service cell according to measurement report data corresponding to each service cell in a preset engineering parameter table to obtain cells with RSI conflict with each service cell, so that the method is applicable to all scenes of root sequence index conflict, and the accuracy of root sequence index conflict detection is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a PRACH collision resulting in a call false alarm;

fig. 2 is a schematic structural diagram of an RSI collision detection system according to an embodiment of the present invention;

fig. 3 is a schematic block diagram of a network management server according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of a method for processing a Root Sequence Index (RSI) conflict provided by an embodiment of the present invention;

fig. 5 is a schematic flow chart of sub-steps of RSI collision detection for a serving cell provided by an embodiment of the present invention;

fig. 6 is a schematic flow chart of a sub-step of determining an associated cell corresponding to a serving cell according to an embodiment of the present invention;

Fig. 7 is a schematic flow chart of a sub-step of determining candidate cells corresponding to a serving cell according to an embodiment of the present invention;

fig. 8 is a schematic flow chart of a sub-step of RSI collision detection provided by an embodiment of the present invention;

fig. 9 is a schematic flow chart of another substep of RSI collision detection for a serving cell provided by an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.

It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Referring to fig. 1, fig. 1 is a schematic diagram of a PRACH collision resulting in a call false alarm. As shown in fig. 1, if the configuration of the PRACH time-frequency code resources of the neighboring cells is the same, then it is possible for the UE1 at the Cell edge to initiate random access using the same PRACH time-frequency code resources, resulting in that both neighboring cells a and Cell B receive the random access request signaling (Random Access Request, denoted as Msg 1) sent by the UE1, and both send random access responses (Random Access Response, RAR) to the UE1, where the RARs sent by the cells a and B interfere with each other, and if the UE1 demodulates the RAR, the identification message signaling (Identification Message, denoted as Msg 3) is continuously sent, otherwise the UE access fails, which is a false alarm of the UE1 call caused by the PRACH collision between the cells. When UE1 initiates random access to Cell B, cell a also detects the preamble sent by UE 1. For CellA, the preamble is a false alarm.

For each cell in the LTE or NR network, a cell-level PRACH resource (including time, frequency and code resources) needs to be allocated, and usually, the time domain and frequency domain resources of the PRACH are fixed, so that a set of preamble sequences generated by using the logical root sequence index between adjacent co-frequency cells can be ensured not to collide by configuring different initial logical Root Sequence Indexes (RSIs) for a plurality of cells, thereby reducing mutual interference generated by using the same preamble sequence by adjacent cells. When a large number of preamble false alarms exist in a cell, a large number of Msg2/Msg3 scheduling failures are caused, a large number of common CCEs (Control Channel Element, control channel units) are consumed, and insufficient CCEs may cause Msg5 scheduling failures of normal UEs (rrc connection set up complete, wireless connection setting is completed), and finally the cell wireless connection rate is affected.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an RSI collision detection system according to an embodiment of the present invention. As shown in fig. 2, the RSI collision detecting system includes a network management server, a storage server, a base station, and a user terminal.

In the embodiment of the invention, the RSI conflict detection system can be applied to a wireless network such as an LTE (Long Term Evolution ) network or an NR (New Radio, new Radio access technology) network, and can be used for detecting the cells in the wireless network, wherein RSI conflicts occur in the cells.

The user terminal may include, but is not limited to, electronic devices such as smart phones, tablet computers, notebook computers, personal digital assistants, wearable devices, and the like. The base station may be a eNodeB (Evolved Node B) base station or a gNB (Next Generation NodeB) base station. The network management server and the storage server can be independent servers or server clusters.

The storage server is used for collecting and storing measurement report data (Measurement Report, MR) reported by all base stations of the whole network. The user terminal is used for measuring the downlink reference signal and reporting the obtained first measurement report data to the base station. The base station is used for carrying out uplink reference signal measurement to obtain second measurement report data; and collecting first measurement report data reported by the user terminal, and uploading the first measurement report data and the second measurement report data to a storage server as final measurement report data. The network management server is used for determining at least one suspicious cell and determining each suspicious cell as a service cell in turn; then, acquiring measurement report data corresponding to each serving cell from a preset engineering parameter table from a storage server, and performing RSI conflict detection on each serving cell to obtain a cell which generates RSI conflict with each serving cell; and finally, optimizing the service cell with the RSI conflict, and transmitting an optimization result to a base station corresponding to the service cell to enable the optimization result to be effective.

Referring to fig. 3, fig. 3 is a schematic block diagram of a network management server according to an embodiment of the present invention. As shown in fig. 3, the network management server 1000 may include a processor 1001 and a memory 1002, where the processor 1001 and the memory 1002 may be connected by a bus, such as any suitable bus, for example, an I2C (Inter-integrated Circuit) bus.

The memory 1002 may include a non-volatile storage medium and an internal memory. The non-volatile storage medium may store an operating system and a computer program. The computer program comprises program instructions that, when executed, cause the processor 1001 to perform any of the root sequence index RSI conflict handling methods.

Wherein the processor 1001 is configured to provide computing and control capabilities to support the operation of the overall network management server 1000.

In an embodiment, the processor 1001 is configured to run a computer program stored in the memory 1002 and implement the following steps when executing the computer program:

determining at least one suspicious cell, and determining each suspicious cell as a service cell in turn, wherein the suspicious cell is a cell with an overlapping coverage area with a neighboring cell, and the suspicious cell is a cell with a coverage radius larger than a preset coverage radius threshold; and detecting RSI conflict of each service cell according to measurement report data corresponding to each service cell in a preset engineering parameter table, and obtaining a cell which generates RSI conflict with each service cell.

In one embodiment, the processor 1001, when implementing the determination of at least one suspicious cell, is configured to implement:

determining suspicious cells according to random access parameters of each cell, wherein the random access parameters comprise virtual detection probability and migration rate, the virtual detection probability is the ratio of the virtual detection times of random access request signaling to the total number of random access request signaling, the migration rate is the ratio of the total number of random access request signaling to the total number of identification message signaling, and the random access request signaling and the identification message signaling are signaling when a user terminal initiates random access to a base station; or determining suspicious cells according to the time advance in the measurement report data of each cell.

In one embodiment, the processor 1001 is configured to, when implementing determining suspicious cells according to random access parameters of each cell, implement at least one of:

obtaining the false detection probability of each cell, and determining the cell with the false detection probability larger than or equal to a preset false detection probability threshold as a suspicious cell; and obtaining the migration rate of each cell, and determining the cell with the migration rate smaller than or equal to a preset migration rate threshold as the suspicious cell.

In one embodiment, the measurement report data includes frequency points, physical layer cell identities, reference signal received power, and time advance; when implementing RSI collision detection on each serving cell according to measurement report data corresponding to each serving cell in a preset engineering parameter table, the processor 1001 is configured to implement:

According to the frequency point in the measurement report data and the reference signal receiving power, determining an associated cell corresponding to each service cell, wherein the associated cell is a cell with an overlapping coverage area with the corresponding service cell; determining a first candidate cell set corresponding to each service cell according to the engineering parameter table, the frequency point of the associated cell and the physical layer cell identification; and according to the time advance of each serving cell and the time advance of each candidate cell in the corresponding first candidate cell set, carrying out RSI conflict detection on each serving cell and each corresponding candidate cell, and obtaining a cell which generates RSI conflict with each serving cell.

In one embodiment, when implementing determining an associated cell corresponding to each serving cell according to the frequency point in the measurement report data and the reference signal received power, the processor 1001 is configured to implement:

determining at least one same-frequency cell of each serving cell according to the frequency points in the measurement report data; determining the total number of measurement report data of each same-frequency cell meeting a first preset condition according to the measurement report data of each same-frequency cell of each serving cell in the same statistical period; and determining the same-frequency cells with the total number larger than the preset total number as the associated cells corresponding to each service cell.

In one embodiment, the engineering parameter table includes latitude and longitude information of each cell; the processor 1001 is configured to, when determining a first candidate cell set corresponding to each serving cell according to the engineering parameter table and the frequency point and physical layer cell identifier of the associated cell, implement:

determining at least one similar cell of all the associated cells of each service cell, wherein the similar cell is a cell with the same frequency point and physical layer cell identifier as the associated cell; determining the distance between each service cell and each corresponding similar cell according to the longitude and latitude information of each service cell and the longitude and latitude information of each corresponding similar cell; and determining similar cells with the distance from each serving cell smaller than a preset distance threshold as candidate cells, and forming a first candidate cell set by the determined at least one candidate cell.

In one embodiment, when implementing RSI collision detection for each serving cell and each corresponding candidate cell according to the time advance of each serving cell and the time advance of each candidate cell in the corresponding first candidate cell set, the processor 1001 is configured to implement:

Determining the coverage radius of each serving cell and the coverage radius of each corresponding candidate cell according to the time advance of each serving cell and the time advance of each candidate cell in the corresponding first candidate cell set; determining the inter-station distance corresponding to each candidate cell according to the longitude and latitude information of each serving cell and the longitude and latitude information of each corresponding candidate cell, wherein the inter-station distance is the distance between each candidate cell and the serving cell; and determining a conflict cell set corresponding to each service cell according to the coverage radius of each service cell, the coverage radius of each candidate cell in the corresponding first candidate cell set and the inter-station distance, wherein the conflict cell set comprises cells which generate RSI conflict with the corresponding service cells.

In one embodiment, the processor 1001 is configured, when implementing determining, according to the coverage radius of each serving cell and the coverage radius and the inter-station distance of each candidate cell in the corresponding first candidate cell set, to implement:

determining a target coverage radius of each candidate cell, wherein the target coverage radius is the maximum value of the coverage radius of each candidate cell and the corresponding service cell; and adding the candidate cells meeting the second preset condition into the conflict cell set of the corresponding service cell, wherein the second preset condition is that the time-frequency code resources of the candidate cells are the same as the time-frequency code resources of the service cell, and the inter-station distance of the candidate cells is smaller than twice the target coverage radius.

In one embodiment, the serving cell is a suspicious cell with a coverage radius greater than a preset coverage radius threshold; when implementing RSI collision detection on each serving cell according to measurement report data corresponding to each serving cell in a preset engineering parameter table, the processor 1001 is configured to implement:

determining a second candidate cell set corresponding to each service cell according to other suspicious cells except the service cell, wherein the suspicious cells are in the range of twice the coverage radius of each service cell and have the same time-frequency code resource as that of each service cell; and according to the engineering parameter table, the measurement report data corresponding to each serving cell and the measurement report data of each candidate cell in the corresponding second candidate cell set, carrying out RSI conflict detection on each serving cell and each corresponding candidate cell to obtain a cell which generates RSI conflict with each serving cell.

In one embodiment, after implementing RSI collision detection on each serving cell according to measurement report data corresponding to each serving cell in a preset engineering parameter table, the processor 1001 is further configured to implement:

Determining the multiplexing distance corresponding to each service cell according to the double coverage radius of each service cell and the maximum inter-station distance corresponding to the cell where the RSI conflict occurs in each service cell; and reconfiguring the RSI of each serving cell based on the multiplexing distance corresponding to each serving cell.

The processor 1001 may be a central processing unit (Central Processing Unit, CPU) which may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

Referring to fig. 4, fig. 4 is a schematic flowchart of a method for processing a root sequence index RSI conflict according to an embodiment of the present invention. The method for processing the root sequence index RSI conflict can be applied to a network management server, each suspicious cell is determined to be a service cell in sequence, then the root sequence index conflict detection is carried out on the service cell according to the measurement report data and the engineering parameter table, the detection of cells of the whole network is not needed, and the method is applicable to the scene of all root sequence index conflicts, so that the efficiency and the accuracy of the root sequence index conflict detection are improved. The processing method of the root sequence index RSI conflict comprises the step S10 and the step S20.

And step S10, determining at least one suspicious cell, and determining each suspicious cell as a service cell in sequence, wherein the suspicious cell is a cell with an overlapping coverage area with a neighboring cell, and the suspicious cell is a cell with a coverage radius larger than a preset coverage radius threshold.

It should be noted that, by determining at least one suspicious cell and determining each suspicious cell as a serving cell in turn, the subsequent RSI collision detection can be performed on the cells having overlapping coverage areas with neighboring cells or the cells having coverage radii larger than a preset coverage radius threshold, so that the detection of cells of the whole network is not required, and the efficiency of RSI collision detection is improved.

In the embodiment of the present invention, how to perform RSI collision detection will be described in detail for two scenarios, namely, a cell having an overlapping coverage area with a neighboring cell and a cell having a coverage radius greater than a preset coverage radius threshold.

When the ue initiates random access to the cell, the cell detects a random access Preamble (Preamble) sent by the ue. Wherein, the power of the Preamble transmitted by the user terminal is generally proportional to the distance from the user terminal to the cell. RSI collisions may occur when multiple geographically located neighbor cells configure the same PRACH time, frequency, code domain resources. When a user terminal initiates random access in a serving cell by using the same PRACH time-frequency code resource, a call false alarm may be generated for other adjacent cells, and the probability of generating the call false alarm is higher for the adjacent cells with smaller distance from the user terminal. The coverage radius of a cell refers to the maximum coverage radius.

In some embodiments, determining at least one suspicious cell may include: and determining suspicious cells according to the random access parameters of the cells.

The random access parameters include a virtual detection probability and a transition rate, wherein the virtual detection probability is a ratio of virtual detection times of random access request signaling (Random Access Request) to the total number of the random access request signaling, the transition rate is a ratio of the total number of the random access request signaling to the total number of identification message signaling (Identification Message), and the random access request signaling and the identification message signaling are signaling when a user terminal initiates random access to a base station. The base station can collect the interactive signaling when the user terminal initiates random access to the base station, and report the interactive signaling to the network management server, and the network management server can determine the random access parameters of the cell according to the interactive signaling.

It should be noted that, for a scenario in which a cell having an overlapping coverage area with a neighboring cell exists, a suspicious cell may be determined by a random access parameter of the cell, and then RSI collision detection may be performed on the suspicious cell.

For example, the random access request signaling, that is, the signaling for transmitting a random access Preamble (Preamble), may be denoted as Msg1; the identification message signaling may be denoted Msg3. The false detection probability can be expressed as:

Wherein Msg1_Fail is the number of false checks of Msg 1; msg1_detect is the total number of msg1 detected by the base station.

The rate of migration can be expressed as:

where msg3_detect is the total number of msg3 detected by the base station.

In the embodiment of the invention, the suspicious cell is determined according to the random access parameters of each cell, and the method comprises at least one of the following steps: obtaining the false detection probability of each cell, and determining the cell with the false detection probability larger than or equal to a preset false detection probability threshold as a suspicious cell; and obtaining the migration rate of each cell, and determining the cell with the migration rate smaller than or equal to a preset migration rate threshold as the suspicious cell.

In some embodiments, determining the suspicious cell according to the random access parameters of each cell may include: and obtaining the false detection probability of each cell, and determining the cell with the false detection probability larger than or equal to a preset false detection probability threshold as the suspicious cell.

For example, a cell may be determined to be a suspicious cell when the false detection probability of the cell is greater than or equal to a preset false detection probability threshold. For example, the cell may be added to the suspicious cell list rsiretectlist. The preset false detection probability threshold may be set according to actual situations, and specific numerical values are not limited herein.

In other embodiments, determining the suspicious cell according to the random access parameter of each cell may further include: and obtaining the migration rate of each cell, and determining the cell with the migration rate smaller than or equal to a preset migration rate threshold as the suspicious cell.

For example, a cell may be determined to be a suspicious cell when the rate of migration of the cell is greater than or equal to a preset rate of migration threshold. For example, the cell may be added to the suspicious cell list rsiretectlist. The preset migration rate threshold may be set according to actual situations, and specific numerical values are not limited herein.

By determining the cells with the false detection probability greater than or equal to the preset false detection probability threshold or the cells with the transition rate less than or equal to the preset transition rate threshold as suspicious cells, the cells with overlapping coverage areas with adjacent cells can be determined as suspicious cells, and the accuracy of determining the suspicious cells is improved.

In other embodiments, determining at least one suspicious cell may include: and determining suspicious cells according to the time advance in the measurement report data of each cell.

In the embodiment of the present invention, for a scenario that the coverage radius is greater than a preset coverage radius threshold, a suspicious cell may be determined according to a Timing Advance (TA) in measurement report data of each cell, and then RSI collision detection is performed on the suspicious cell.

It should be noted that, the storage server stores measurement report data corresponding to each cell, and the base station corresponding to each cell may report the collected measurement report data to the storage server. Exemplary measurement report data includes parameters such as frequency point, physical layer cell identity (Physical Cell Identifier, PCI), reference signal received power (Reference Singnal Received Power, RSRP), and time advance. For example, the measurement report data corresponding to each cell includes parameters such as a frequency point, a PCI, an RSRP, and a TA of the cell, and may also include parameters such as a frequency point, a PCI, an RSRP, and a TA of a neighboring cell of the cell. Wherein, the frequency point refers to the number of the fixed frequency.

In some embodiments, the coverage radius Rs of each cell may be calculated according to the time advance in the measurement report data of each cell; and then determining the cells with the coverage radius larger than a preset coverage radius threshold as suspicious cells. The preset coverage radius threshold may be set according to practical situations, and specific values are not limited herein. The calculation process of the coverage radius is not limited herein.

For example, when the preset coverage radius threshold is 2Km, a cell with a radius Rs greater than or equal to 2Km may be covered, and the cell is determined to be a suspicious cell; and adding the determined suspicious cells to a suspicious cell list rsiretectlist.

And according to the time advance in the measurement report data of each cell, calculating the coverage radius of each cell, and determining the cell with the coverage radius larger than a preset coverage radius threshold as the suspicious cell, thereby realizing the determination of the cell with high power or higher position as the suspicious cell. In a cell with an excessively large coverage radius, the transmission power of the UE in the cell is too high, and if the cell collides with the cell with a smaller coverage radius, a false alarm is likely to occur.

In some embodiments, each suspicious cell may be determined in turn as a serving cell, where the suspicious cell is a cell that has an overlapping coverage area with neighboring cells.

For example, when there is an overlapping coverage area between the neighboring cells Cell a and Cell B, it is possible that the user terminals in the overlapping coverage area initiate random access using the same PRACH time-frequency code resource, resulting in the generation of a call false alarm by the cells Cell a and Cell B. Wherein, the probability of generating a call false alarm is higher for a cell with smaller distance with the user terminal.

The RSI collision detection method and the RSI collision detection system can be applied to a scene of RSI collision detection on a cell with an overlapping coverage area with other cells by taking the cell with the overlapping coverage area with the adjacent cell as a serving cell.

In other embodiments, each suspicious cell may be determined in turn as a serving cell, where the suspicious cell is a cell with a coverage radius greater than a preset coverage radius threshold.

For example, when the coverage radius of the Cell B is larger than the preset coverage radius threshold for the neighboring Cell a and Cell B, the user terminals in the Cell B initiate random access using the same PRACH time-frequency code resource because of the larger transmission power of the UE in the Cell B, which may cause the Cell a to generate a call false alarm, because the transmitting power of the UE in the Cell A is smaller, the user terminals in the Cell A initiate random access by using the same PRACH time-frequency code resource, and the Cell B cannot generate a call false alarm.

The RSI conflict detection is carried out by taking the cell with the coverage radius larger than the preset coverage radius threshold value as the service cell, so that the method and the device can be suitable for the scene of carrying out RSI conflict detection on the cell with high power or higher position.

And step S20, according to measurement report data corresponding to each service cell in a preset engineering parameter table, carrying out RSI conflict detection on each service cell to obtain a cell which generates RSI conflict with each service cell.

It should be noted that, by performing RSI conflict detection on each serving cell according to measurement report data corresponding to each serving cell in a preset engineering parameter table, a cell having an RSI conflict with each serving cell is obtained, which can be suitable for all scenes of root sequence index conflict, and improves accuracy of root sequence index conflict detection.

In the embodiment of the present invention, the detailed description will be made of RSI collision detection for each serving cell, taking the serving cell as a suspicious cell having an overlapping coverage area with a neighboring cell.

For example, the associated cell of each serving cell may be determined by measuring the frequency point and RSRP in the report data; then searching candidate cells which are possibly in RSI conflict with the serving cell according to the frequency points and PCI of the associated cells based on the engineering parameter table; and finally, carrying out RSI conflict detection on each serving cell and each corresponding candidate cell to obtain a cell which generates RSI conflict with each serving cell.

The engineering parameter table may include a global cell identity (Cell Global Identity, CGI) of the cell, a frequency point, a PCI, latitude and longitude information, PRACH time-frequency code resources, and the like. It should be noted that the engineering parameter table is an engineering parameter of the base station defined in advance, and may include parameters such as longitude and latitude, hanging height, antenna directivity, gain, azimuth angle, downtilt angle, and the like of the antenna position of the base station. It is understood that a cell refers to a range covered by a wireless network signal of a base station, so that an engineering parameter table of the base station may be used as an engineering parameter table of a cell corresponding to the base station, and the engineering parameter table may include engineering parameters of a whole network cell.

By carrying out RSI conflict detection on each service cell according to the measurement report data corresponding to each service cell in a preset engineering parameter table, a cell with RSI conflict generated by each service cell is obtained, the problems that an RSI conflict detection mode based on a neighbor cell list cannot be applied to an RSI conflict scene of a non-neighbor cell and an RSI detection mode based on an X2/Xn port message cannot be applied to a scene that a service base station and other base stations do not establish an X2/Xn interface are solved, and the accuracy of root sequence index conflict detection is improved.

Referring to fig. 5, fig. 5 is a schematic flowchart of a substep of RSI collision detection for each serving cell according to an embodiment of the present invention, which may specifically include steps S201 to S203.

Step S201, according to the frequency point in the measurement report data and the reference signal receiving power, determining an associated cell corresponding to each service cell, wherein the associated cell is a cell with an overlapping coverage area with the corresponding service cell.

It should be noted that, since the measurement report data corresponding to each serving cell may include parameters such as a frequency point, a PCI, an RSRP, and a TA of the serving cell, and may also include parameters such as a frequency point, a PCI, an RSRP, and a TA of a neighboring cell of the serving cell, the same-frequency cell storing the overlapping coverage area with each serving cell may be counted through the frequency point and the RSRP in the measurement report data of each serving cell, and the same-frequency cell satisfying the preset first preset condition may be determined as the associated cell.

For example, for serving Cell 0, the corresponding measurement report data is as follows:

serving Cell 0: frequency point=f0, pci=0, rsrp= -100dBm;

neighbor 1: frequency point=f0, pci=5, rsrp= -105dBm;

neighbor cell 2: frequency point=f1, pci=10, rsrp= -110dBm;

neighbor cell 3: frequency point=f0, pci=12, rsrp= -106dBm.

Referring to fig. 6, fig. 6 is a schematic flowchart of a sub-step of determining an associated cell corresponding to each serving cell according to an embodiment of the present invention, and may specifically include step S2011 and step S2013.

And step 2011, determining at least one same-frequency cell of each serving cell according to the frequency point in the measurement report data.

The same frequency cell is a cell with the same frequency point as that of the serving cell. For example, if the frequency point of the serving Cell 0 is f0, a neighboring Cell whose frequency point is f0 may be determined as the same-frequency Cell of the serving Cell 0.

Step 2012, determining the total number of the measurement report data of each common-frequency cell meeting the first preset condition according to the measurement report data of each common-frequency cell in the same statistical period of each serving cell.

The first preset condition comprises: the reference signal receiving power of the serving cell is larger than or equal to a preset first reference signal receiving power threshold, and the difference between the reference signal receiving power of the serving cell and the reference signal receiving power of the same-frequency cell is smaller than or equal to a preset second reference signal receiving power threshold. The preset first reference signal receiving power threshold and the preset second reference signal receiving power threshold may be set according to actual situations, and specific values are not limited herein.

It will be appreciated that the reference signal received power RSRP is used to represent the radio signal strength, and that the larger the value of the reference signal received power, the greater the signal strength. Thus, the smaller the difference between the RSRP of the serving cell and the RSRP of the on-channel cell, the more likely an overlapping coverage area is to exist between the serving cell and the on-channel cell.

For example, the total number of measurement report data of each co-frequency cell satisfying the first preset condition may be determined according to measurement report data of each serving cell and each corresponding co-frequency cell included in the same statistical period.

For example, the first reference signal received power threshold may be-120 dBm and the second reference signal received power threshold may be 9dBm. Measurement report data in which the RSRP of the serving cell is less than or equal to-120 dBm and the difference between the RSRP of the serving cell and the RSRP of the on-channel cell is less than or equal to 9dBm may be determined as measurement report data in which the on-channel cell satisfies the first preset condition, as shown in table 1.

TABLE 1

For example, in table 1, the total number of MRs of the same-frequency Cell 10 satisfying the first preset condition is 176, and the total number of MRs of the same-frequency Cell 216 satisfying the first preset condition is 23.

And step S2013, determining the same-frequency cells with the total number larger than the preset total number as the associated cells corresponding to each service cell.

In the embodiment of the present invention, the preset total number may be set according to actual situations, and specific numerical values are not limited herein.

For example, when the preset total number is 100, the co-frequency cells with the total number greater than 100 may be determined as the associated cell corresponding to each serving cell. For example, in table 1, the associated cells corresponding to the serving Cell 0 are Cell 10 and Cell 29.

The method comprises the steps of determining at least one same-frequency cell of each serving cell according to frequency points in measurement report data, determining the total number of measurement report data of each same-frequency cell meeting a first preset condition, and further determining the same-frequency cells with the total number being larger than the preset total number as associated cells corresponding to each serving cell, so that the associated cells with overlapping coverage areas with the serving cells are determined according to the frequency points and reference signal received power.

Step S202, according to the engineering parameter table, the frequency points of the associated cells and the physical layer cell identification, a first candidate cell set corresponding to each service cell is determined.

Referring to fig. 7, fig. 7 is a schematic flowchart of a sub-step of determining a candidate cell corresponding to each serving cell according to an embodiment of the present invention, which may specifically include step S2021 and step S2023.

Step S2021, determining at least one similar cell of all the associated cells of each serving cell, where the similar cell is a cell with the same frequency point and physical layer cell identifier of the associated cell.

In the embodiment of the present invention, according to the frequency point and PCI of the associated cell of the serving cell, the serving cell is taken as a starting point, and the whole network searches n cells which have the same frequency point and physical layer cell identifier of the associated cell and are closer to each other, so as to obtain candidate cells which may have RSI collision with the serving cell.

For example, the same cell as the frequency point and physical layer cell identity of the associated cell may be determined as a similar cell of the serving cell. For example, for the serving Cell 0, a Cell identical to the frequency point and PCI of the associated Cell 10 and a Cell identical to the frequency point and PCI of the associated Cell 29 may be determined as a similar Cell to the serving Cell 0. In addition, the associated Cell 10 and the associated Cell 29 may also be determined as similar cells to the serving Cell 0.

It will be appreciated that when the number of cells of the same frequency network is large, PCI multiplexing inevitably occurs, i.e. multiple cells use the same PCI.

Step S2022, determining a distance between each serving cell and each corresponding similar cell according to the latitude and longitude information of each serving cell and the latitude and longitude information of each corresponding similar cell.

It should be noted that, the engineering parameter table includes longitude and latitude information of each cell, so that longitude and latitude information of each service cell and longitude and latitude information of each corresponding similar cell can be obtained by querying the engineering parameter table. The latitude and longitude information may include position coordinates composed of latitude and longitude.

For example, the distance between each serving cell and each similar cell may be calculated according to the latitude and longitude information of each serving cell and the latitude and longitude information of each corresponding similar cell. The specific calculation process is not limited herein. For example, the distance between the serving Cell 0 and each similar Cell may be calculated from the position coordinates of the serving Cell 0 and the position coordinates of each similar Cell of the serving Cell 0.

Step S2023, determining similar cells with a distance from each serving cell smaller than a preset distance threshold as candidate cells, and forming a first candidate cell set by the determined at least one candidate cell.

For example, after determining the distance between each serving cell and each similar cell, similar cells having a distance from each serving cell smaller than a preset distance threshold may be determined as candidate cells. And then, generating a first candidate cell set corresponding to each service cell according to the candidate cell corresponding to each service cell. The preset distance threshold may be set according to practical situations, and specific numerical values are not limited herein. For example, the preset distance threshold may be 10km.

It will be appreciated that the smaller the distance from the serving cell, the higher the probability that there is an overlapping coverage area with the serving cell.

For example, for the serving Cell 0, according to the frequency point and PCI of the associated Cell of the serving Cell 0, searching for a Cell with the same frequency point and physical layer Cell identifier as the associated Cell and a distance from the serving Cell 0 smaller than a preset distance threshold value from the serving Cell 0 as a starting point in the whole network to obtain a candidate Cell corresponding to the serving Cell 0.

For example, when the whole network searching range is too large, and the searching time is too long, the serving Cell 0 may be used as a starting point, and cells with the same frequency point and physical layer Cell identifier as those of the associated Cell may be searched within the range of 10km, so as to obtain candidate cells corresponding to the serving Cell 0.

Illustratively, for serving Cell 0, a first set of candidate cells, e.g., { Cell 17,cell 56,cell 128}, will be generated for similar cells that are less than 10km away from serving Cell 0.

By determining candidate cells according to the frequency point, the physical layer cell identification and the longitude and latitude information, the candidate cells with overlapping coverage areas with the serving cell within the preset distance threshold range can be obtained.

Step S203, according to the time advance of each service cell and the time advance of each candidate cell in the corresponding first candidate cell set, RSI conflict detection is carried out on each service cell and each corresponding candidate cell, and a cell which generates RSI conflict with each service cell is obtained.

Referring to fig. 8, fig. 8 is a schematic flowchart of a substep of RSI collision detection according to an embodiment of the present invention, which may specifically include step S2031 and step S2033.

Step S2031, determining a coverage radius of each serving cell and a coverage radius of each corresponding candidate cell according to the time advance of each serving cell and the time advance of each candidate cell in the corresponding first candidate cell set.

For example, the coverage radius of each serving cell and the coverage radius of each corresponding candidate cell may be determined according to the time advance of each serving cell and the time advance of each candidate cell in the corresponding first candidate cell set.

For example, for the serving Cell 0, the coverage radius Rs of the serving Cell 0 and the coverage radius Rc of each corresponding candidate Cell may be calculated according to the time advance TA of the serving Cell 0 and the time advance TA of each candidate Cell in the corresponding first candidate Cell set. The specific calculation process is not limited herein.

Step S2032, determining a distance between stations corresponding to each candidate cell according to the latitude and longitude information of each serving cell and the latitude and longitude information of each corresponding candidate cell, where the distance between stations is the distance between each candidate cell and the serving cell.

When calculating the distance between the two cells, the distance between the two base stations may be determined as the inter-station distance between the two cells with the base stations of the two cells as the center point.

For example, the inter-station distance corresponding to each candidate cell may be calculated according to the position coordinate of each serving cell and the position coordinate of each corresponding candidate cell. The distance between stations may be denoted as L, and the specific calculation process is not limited herein.

Step S2033, determining a conflict cell set corresponding to each serving cell according to the coverage radius of each serving cell, the coverage radius of each candidate cell in the corresponding first candidate cell set, and the inter-station distance, where the conflict cell set includes cells that have RSI conflicts with the corresponding serving cells.

In some embodiments, determining the set of conflict cells corresponding to each serving cell according to the coverage radius of each serving cell and the coverage radius and the inter-station distance of each candidate cell in the corresponding first set of candidate cells may include: determining a target coverage radius for each candidate cell; and adding the candidate cells meeting the second preset condition into the conflict cell set of the corresponding service cell.

The target coverage radius is the maximum value of the coverage radius of each candidate cell and the corresponding service cell. The second preset condition is that the time-frequency code resource of the candidate cell is the same as the time-frequency code resource of the service cell, and the inter-station distance of the candidate cell is smaller than twice the target coverage radius. The target coverage radius may be expressed as max { Rs, rc }, the inter-site distance of the candidate cell is less than twice the target coverage radius may be expressed as L < max {2Rs,2Rc }.

In some embodiments, for serving Cell 0 and corresponding first candidate Cell set { Cell 17,cell 56,cell 128}, the coverage radius of serving Cell 0 and the coverage radius of each candidate Cell in corresponding first candidate Cell set { Cell 17,cell 56,cell 128}, as shown in table 2.

TABLE 2

Cell	Radius of coverage
		cell 0	1km
cell 17	2.5km
		cell 56	5km
cell 128	2km

Then, the serving Cell 0 is combined with each candidate Cell in the first candidate Cell set to obtain a candidate Cell pair of the serving Cell 0 as { (Cell 0, cell 17), (Cell 0, cell 56), (Cell 0, cell 128) }. Wherein the inter-station distances corresponding to each candidate cell are shown in table 3.

TABLE 3 Table 3

Candidate cell pair	Inter-station distance L corresponding to candidate cell
		{cell 0，cell 17}	4km
{cell 0，cell 56}	6km
		{cell 0，cell 128}	3km

For example, for the candidate Cell pair (Cell 0, cell 17), the inter-site distance L is 4km, max {2rs,2rc } = max {2km,5km } = 5km, and L < max {2rs,2rc }, if the time-frequency code resource of the candidate Cell 17 is the same as the time-frequency code resource of the serving Cell 0, the candidate Cell pair (Cell 0, cell 17) may be determined as the target Cell pair, that is, the candidate Cell 17 is the Cell that has RSI collision with the serving Cell 0.

For example, for the candidate Cell pair (Cell 0, cell 56), the inter-station distance L is 6km, max {2rs,2rc } = max {2km,10km } = 10km, satisfying L < max {2rs,2rc }, and if the time-frequency code resource of the candidate Cell 56 is not the same as the time-frequency code resource of the serving Cell 0, it can be determined that the candidate Cell 56 and the serving Cell 0 do not have RSI collision.

For another example, for the candidate Cell pair (Cell 0, cell 128), the inter-site distance L is 3km, max {2rs,2rc } = max {2km,4km } = 4km, and L < max {2rs,2rc }, if the time-frequency code resource of the candidate Cell 128 is the same as the time-frequency code resource of the serving Cell 0, the candidate Cell pair (Cell 0, cell 128) may be determined as the target Cell pair, that is, the candidate Cell 128 is a Cell that collides with the RSI of the serving Cell 0.

Illustratively, the resulting set of conflicting cells for serving Cell 0 is { (Cell 0, cell 17), (Cell 0, cell 128) }.

By determining the coverage radius of each serving cell and the coverage radius of each corresponding candidate cell and determining the inter-station distance corresponding to each candidate cell, the method can determine the conflict cell set corresponding to each serving cell according to the candidate cells with the same time-frequency code resource and the same inter-station distance as those of the serving cells and the inter-station distance smaller than twice the target coverage radius, and improves the accuracy of RSI conflict detection.

The serving cell may be a suspicious cell having a coverage radius larger than a preset coverage radius threshold, in addition to a suspicious cell having an overlapping coverage area with a neighboring cell. In the embodiment of the present invention, the detailed description will be made on the RSI collision detection of each serving cell by taking the serving cell as the suspicious cell whose coverage radius is greater than the preset coverage radius threshold.

Referring to fig. 9, fig. 9 is a schematic flowchart of another substep of RSI collision detection for each serving cell according to an embodiment of the present invention, which may specifically include step S204 and step S205.

Step S204, a second candidate cell set corresponding to each service cell is determined according to other suspicious cells except the service cell, wherein the suspicious cells are in the range of twice the coverage radius of each service cell and have the same time-frequency code resource as that of each service cell.

For example, the candidate cells of each serving cell may be determined according to other suspicious cells except the serving cell, which are within the range of twice the coverage radius of each serving cell and have the same time-frequency code resource as the time-frequency code resource of each serving cell, and the determined at least one candidate cell forms a second candidate cell set corresponding to each serving cell. The coverage radius Rs of each serving cell may be calculated according to the time advance TA of each serving cell. The time-frequency code resource can be obtained by inquiring the engineering parameter table.

For example, for the serving Cell 1, the serving Cell 1 may be used as a starting point, and the whole network search is performed within a range of two times of coverage radius, and other suspicious cells with the same time-frequency code resource as the serving Cell 1 are determined as candidate cells, so as to form a second candidate Cell set, such as { Cell 11,cell 67,cell 215}.

The other suspicious cells refer to cells with overlapping coverage areas with neighboring cells, or cells with coverage radii larger than a preset coverage radius threshold, namely, cells in a suspicious cell list rsidrectrist.

It should be noted that, in the embodiment of the present invention, the manner of determining the second candidate cell set is different from the manner of determining the first candidate cell set. The method and the device can be suitable for the scene of RSI conflict detection on the high-power or higher-position cells by taking other suspicious cells except the serving cells, which are in the range of twice the coverage radius of each serving cell and have the same time-frequency code resource as that of each serving cell, as candidate cells.

By determining the second candidate cell set corresponding to each serving cell according to other suspicious cells except the serving cell, wherein the suspicious cells are in the range of twice the coverage radius of each serving cell and the time-frequency code resource is the same as that of each serving cell, a small number of cells can be used as candidate cells, all the cells do not need to be used as candidate cells of the serving cell, and the efficiency of subsequent RSI conflict detection is improved.

Step S205, according to the engineering parameter table, the measurement report data corresponding to each service cell and the measurement report data of each candidate cell in the corresponding second candidate cell set, RSI conflict detection is carried out on each service cell and each corresponding candidate cell, and a cell with RSI conflict with each service cell is obtained.

The engineering parameter table includes longitude and latitude information of each serving cell and longitude and latitude information of each corresponding candidate cell. The measurement report data corresponding to the serving cell comprises the time advance of the serving cell; the measurement report data of the candidate cell includes a time advance of the candidate cell.

In some embodiments, performing RSI collision detection on each serving cell and each corresponding candidate cell according to the engineering parameter table, the measurement report data corresponding to each serving cell, and the measurement report data of each candidate cell in the corresponding second candidate cell set, to obtain a cell having an RSI collision with each serving cell may include: determining the coverage radius of each serving cell and the coverage radius of each corresponding candidate cell according to the time advance of each serving cell and the time advance of each candidate cell in the corresponding second candidate cell set; determining the inter-station distance corresponding to each candidate cell according to the longitude and latitude information of each serving cell and the longitude and latitude information of each corresponding candidate cell, wherein the inter-station distance is the distance between each candidate cell and the serving cell; and determining a conflict cell set corresponding to each service cell according to the coverage radius of each service cell, the coverage radius of each candidate cell in the corresponding second candidate cell set and the inter-station distance, wherein the conflict cell set comprises cells which generate RSI conflict with the corresponding service cells.

Illustratively, determining the conflict cell set corresponding to each serving cell according to the coverage radius of each serving cell and the coverage radius and the inter-station distance of each candidate cell in the corresponding second candidate cell set may include: determining a target coverage radius of each candidate cell, wherein the target coverage radius is the maximum value of the coverage radius of the candidate cell and the coverage radius of the corresponding service cell; and adding the candidate cells meeting the third preset condition into the conflict cell set of the corresponding service cell, wherein the third preset condition is that the inter-station distance of the candidate cells is smaller than twice the target coverage radius.

Wherein the target radius of coverage may be expressed as max { Rs, rc }, and the third preset condition is L < max {2Rs,2Rc }.

In some embodiments, for serving Cell 1 and the corresponding second set of candidate cells { Cell 11,cell 67,cell 215}, the coverage radius of serving Cell 1 and the coverage radius of each candidate Cell in the corresponding second set of candidate cells { Cell 11,cell 67,cell 215}, as shown in table 4.

TABLE 4 Table 4

Cell	Radius of coverage
		cell 1	5km
cell 11	2km
		Cell 67	1km
Cell 215	1.5km

Then, the serving Cell 1 is combined with each candidate Cell in the second candidate Cell set to obtain a candidate Cell pair of the serving Cell 1 as { (Cell 1, cell 11), (Cell 1, cell 67), (Cell 1, cell 215) }. Wherein the inter-station distances corresponding to each candidate cell are shown in table 5.

TABLE 5

Candidate cell pair	Inter-station distance L corresponding to candidate cell
		{cell 1，cell 11}	2km
{cell 1，cell 67}	11km
		{cell 1，cell 215}	7km

For example, for the candidate cell pair { cell 1, cell 11}, the inter-site distance l=2km, max {2rs,2rc } = max {10km,4km } = 10km, satisfying the third preset condition: l < max {2rs,2rc }, the candidate Cell pair (Cell 1, cell 11) may be determined as the target Cell pair, i.e. the candidate Cell 11 is a Cell that has an RSI collision with the serving Cell 1.

For example, for the candidate cell pair { cell 1, cell 67}, the inter-site distance l=11 km, max {2rs,2rc } = max {10km,2km } = 10km, the third preset condition is not satisfied: l < max {2rs,2rc }, then there is no RSI collision for the candidate cell pair { cell 1, cell 67 }.

For another example, the candidate cell pair { cell 1, cell 215}, inter-site distance l=7km, max {2rs,2rc } = max {10km,3km } = 10km, satisfies the third preset condition: l < max {2rs,2rc }, the candidate Cell pair { Cell 1, cell 215} can be determined as the target Cell pair, i.e., candidate Cell 215 is the Cell that has an RSI collision with the serving Cell 1.

Illustratively, the resulting set of conflicting cells for serving Cell 1 is { (Cell 1, cell 11), (Cell 1, cell 215) }.

In the embodiment of the present invention, when determining the second candidate cell set, other suspicious cells except for the serving cell, which have the same time-frequency code resource as the time-frequency code resource of each serving cell, may be used as candidate cells, or, when performing RSI collision detection on the candidate cells, the candidate cells of other suspicious cells except for the serving cell, which have the same time-frequency code resource as the time-frequency code resource of each serving cell, may be determined as cells that have RSI collision with the serving cell.

For example, when determining the second candidate cell set in step S204, the second candidate cell set corresponding to each serving cell may also be determined according to cells within a range of twice the coverage radius of each serving cell. The determining the conflict cell set corresponding to each service cell according to the coverage radius of each service cell and the coverage radius and the inter-station distance of each candidate cell in the corresponding second candidate cell set may include: determining a target coverage radius of each candidate cell of each serving cell, wherein the target coverage radius is the maximum value of the coverage radius of the serving cell and the coverage radius of the candidate cell; determining candidate cells meeting the third preset condition and the fourth preset condition of each serving cell as target cells of each serving cell; and generating a conflict cell set corresponding to each service cell according to the target cell of each service cell.

The fourth preset condition is that the candidate cells are other suspicious cells except the serving cell, wherein the time frequency code resources of the suspicious cells are the same as the time frequency code resources of each serving cell.

It should be noted that, in the embodiment of the present invention, after obtaining the cells that have RSI collision with each serving cell, RSI optimization may also be performed on each serving cell, that is, existing RSI of each serving cell may be reconfigured.

In some embodiments, according to measurement report data corresponding to each serving cell in a preset engineering parameter table, RSI collision detection is performed on each serving cell, and after obtaining a cell having an RSI collision with each serving cell, the method further includes: determining a multiplexing distance corresponding to each service cell according to the double coverage radius of each service cell and the maximum inter-station distance corresponding to the cell where the RSI conflict occurs in each service cell; and reconfiguring the RSI of each service cell based on the multiplexing distance corresponding to each service cell, so that the cells which have RSI conflict with each service cell cannot multiplex the reconfigured RSI within the multiplexing distance.

The maximum inter-station distance is the maximum value of inter-station distances corresponding to all cells in which RSI collisions occur for each serving cell, among the set of collision cells corresponding to each serving cell. The multiplexing distance refers to the minimum distance between cells allowed to use the same carrier frequency under the condition of satisfying the mobile communication quality, i.e., the minimum safe distance for the same frequency multiplexing.

For example, the maximum one of the maximum inter-station distances corresponding to the cells where the twice coverage radius of each serving cell and the RSI collision of each serving cell occur may be determined as the multiplexing distance corresponding to each serving cell. Wherein the multiplexing distance can be expressed as max {2Rs, L _max 2Rs is twice the radius of coverage.

For example, a double coverage radius of each serving cell and a maximum inter-station distance corresponding to a cell where RSI collision occurs for each serving cell are shown in table 6.

TABLE 6

Serving cell	Conflicting cell sets	Double radius of coverage (2 Rs)	Maximum distance between stations L _max
				Cell 0	(Cell 0,Cell 17)，(Cell 0,Cell 128)	2km	4km
Cell 1	(Cell 1,Cell 11)，(Cell 1,Cell 215)	10km	7km
				Cell 5	(Cell 5,Cell 34)	2km	4.5km
Cell 29	(Cell 29,Cell 0)，(Cell 29,Cell 110)	3km	2km
				…	…		...

For example, for the serving Cell 0, the multiplexing distance corresponding to Cell 0 can be determined to be 4km by the above table 6; for the serving Cell 1, it may be determined that the multiplexing distance corresponding to Cell 1 is 10km.

For example, after determining the multiplexing distance corresponding to each serving cell, the RSI of each serving cell may be reconfigured based on the multiplexing distance corresponding to each serving cell, so that the cells that collide with the RSI of each serving cell cannot multiplex the reconfigured RSI within the multiplexing distance. The specific RSI configuration procedure is not limited herein.

For example, for the serving Cell 0, the RSI of the serving Cell 0 is reconfigured based on the multiplexing distance of 4km so that the cells Cell 17, cell 128 having the RSI collision with the serving Cell 0 cannot multiplex the reconfigured RSI within the multiplexing distance of 4 km.

For another example, for the serving Cell 1, the RSI of the serving Cell 1 is reconfigured based on the multiplexing distance of 10km so that the cells Cell 11, cell 215 that collide with the RSI of the serving Cell 1 cannot multiplex the reconfigured RSI within the multiplexing distance of 10km.

The multiplexing distance corresponding to each service cell is determined according to the double coverage radius of each service cell and the maximum inter-station distance corresponding to the cell where the RSI conflict occurs in each service cell, and the RSI of each service cell is reconfigured based on the multiplexing distance, so that RSI conflicts among the cells can be effectively avoided, the probability of generating call false alarms in the cells is reduced, and the wireless call completing rate of the cells is improved.

According to the root sequence index RSI conflict processing method, the server and the storage medium, by determining at least one suspicious cell and sequentially determining each suspicious cell as a service cell, RSI conflict detection can be carried out on cells with overlapping coverage areas with adjacent cells or cells with coverage radii larger than the preset coverage radius threshold, detection on cells of the whole network is not needed, and RSI conflict detection efficiency is improved; by determining candidate cells according to the frequency point, the physical layer cell identification and the longitude and latitude information, the candidate cells with overlapping coverage areas with the serving cells within a preset distance threshold range can be obtained; by determining the coverage radius of each serving cell and the coverage radius of each corresponding candidate cell and determining the inter-station distance corresponding to each candidate cell, the method can determine the conflict cell set corresponding to each serving cell according to the candidate cells with the same time-frequency code resource and the same inter-station distance as the serving cell and the inter-station distance less than twice the target coverage radius, and improves the accuracy of RSI conflict detection; by determining the second candidate cell set corresponding to each serving cell according to other suspicious cells except the serving cell, wherein the suspicious cells are in the range of twice the coverage radius of each serving cell and the time-frequency code resource is the same as that of each serving cell, a small number of cells can be used as candidate cells, all the cells are not required to be used as candidate cells of the serving cell, and the efficiency of subsequent RSI conflict detection is improved; the multiplexing distance corresponding to each service cell is determined according to the double coverage radius of each service cell and the maximum inter-station distance corresponding to the cell where the RSI conflict occurs in each service cell, and the RSI of each service cell is reconfigured based on the multiplexing distance, so that RSI conflicts among the cells can be effectively avoided, the probability of generating call false alarms in the cells is reduced, and the wireless call completing rate of the cells is improved.

The embodiment of the invention also provides a storage medium, which is used for computer readable storage, and the storage medium stores one or more programs, and the one or more programs can be executed by one or more processors, so as to implement the steps of the method for processing the Root Sequence Index (RSI) conflict provided by the specification of the embodiment of the invention.

For example, the program is loaded by a processor, and the following steps may be performed:

The storage medium may be an internal storage unit of the network management server of the foregoing embodiment, for example, a hard disk or a memory of the network management server. The storage medium may also be an external storage device of a network management server, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the network management server.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware embodiment, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

It should be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A method of processing a root sequence index, RSI, collision, the method comprising:

determining at least one suspicious cell, and sequentially determining each suspicious cell as a service cell, wherein the suspicious cell is a cell with an overlapping coverage area with an adjacent cell or the suspicious cell is a cell with a coverage radius larger than a preset coverage radius threshold;

and detecting RSI conflict of each service cell according to measurement report data corresponding to each service cell in a preset engineering parameter table, and obtaining a cell which generates RSI conflict with each service cell.

2. The method for processing the root sequence index RSI conflict of claim 1, wherein said determining at least one suspicious cell includes:

determining suspicious cells according to random access parameters of each cell, wherein the random access parameters comprise virtual detection probability and migration rate, the virtual detection probability is the ratio of the virtual detection times of random access request signaling to the total number of random access request signaling, the migration rate is the ratio of the total number of random access request signaling to the total number of identification message signaling, and the random access request signaling and the identification message signaling are signaling when a user terminal initiates random access to a base station; or (b)

And determining the suspicious cells according to the time advance in the measurement report data of each cell.

3. The method for processing the root sequence index RSI collision according to claim 2, wherein said determining said suspicious cells according to random access parameters of each cell includes at least one of:

obtaining the false detection probability of each cell, and determining the cell with the false detection probability larger than or equal to a preset false detection probability threshold as the suspicious cell;

and obtaining the migration rate of each cell, and determining the cell with the migration rate smaller than or equal to a preset migration rate threshold as the suspicious cell.

4. The method for processing the root sequence index RSI collision according to claim 1, wherein said measurement report data includes a frequency point, a physical layer cell identity, a reference signal received power, and a time advance;

and performing RSI conflict detection on each serving cell according to measurement report data corresponding to each serving cell in a preset engineering parameter table to obtain a cell having RSI conflict with each serving cell, wherein the method comprises the following steps:

determining an associated cell corresponding to each service cell according to the frequency point in the measurement report data and the reference signal receiving power, wherein the associated cell is a cell with an overlapping coverage area with the corresponding service cell;

Determining a first candidate cell set corresponding to each service cell according to the engineering parameter table, the frequency point of the associated cell and the physical layer cell identification;

and according to the time advance of each service cell and the time advance of each candidate cell in the corresponding first candidate cell set, carrying out RSI conflict detection on each service cell and each corresponding candidate cell, and obtaining a cell which generates RSI conflict with each service cell.

5. The method for processing the root sequence index RSI collision according to claim 4, wherein said determining an associated cell corresponding to each of said serving cells according to the frequency point in said measurement report data and a reference signal received power includes:

determining at least one same-frequency cell of each service cell according to the frequency point in the measurement report data;

determining the total number of measurement report data of each same-frequency cell meeting a first preset condition according to the measurement report data of each same-frequency cell of each service cell in the same statistical period;

and determining the same-frequency cells with the total number larger than the preset total number as associated cells corresponding to each service cell.

6. The method for processing a root sequence index RSI conflict according to claim 5, wherein said first preset condition includes: the reference signal receiving power of the serving cell is larger than or equal to a preset first reference signal receiving power threshold, and the difference value between the reference signal receiving power of the serving cell and the reference signal receiving power of the same-frequency cell is smaller than or equal to a preset second reference signal receiving power threshold.

7. The method for processing the root sequence index RSI conflict according to claim 4, wherein said engineering parameter table includes latitude and longitude information of each cell;

the determining a first candidate cell set corresponding to each serving cell according to the engineering parameter table, the frequency point of the associated cell and the physical layer cell identifier, includes:

determining at least one similar cell of all the associated cells of each service cell, wherein the similar cell is a cell with the same frequency point and physical layer cell identifier as the associated cell;

determining the distance between each service cell and each corresponding similar cell according to the longitude and latitude information of each service cell and the longitude and latitude information of each corresponding similar cell;

And determining similar cells with the distance from each service cell smaller than a preset distance threshold value as candidate cells, and forming the first candidate cell set by the determined at least one candidate cell.

8. The method for processing the RSI collision according to claim 4, wherein said performing RSI collision detection on each of said serving cells and each of said candidate cells according to the time advance of each of said serving cells and the time advance of each of said candidate cells in said first candidate cell set, and obtaining the cell having the RSI collision with each of said serving cells, comprises:

determining a coverage radius of each serving cell and a coverage radius of each corresponding candidate cell according to the time advance of each serving cell and the time advance of each candidate cell in the corresponding first candidate cell set;

determining the inter-station distance corresponding to each candidate cell according to the longitude and latitude information of each serving cell and the longitude and latitude information of each corresponding candidate cell, wherein the inter-station distance is the distance between each candidate cell and the serving cell;

And determining a conflict cell set corresponding to each service cell according to the coverage radius of each service cell, the coverage radius of each candidate cell in the corresponding first candidate cell set and the inter-station distance, wherein the conflict cell set comprises cells which generate RSI conflict with the corresponding service cells.

9. The method for processing the root sequence index RSI conflict according to claim 8, wherein said determining a corresponding conflicting cell set for each of said serving cells based on a coverage radius of each of said serving cells and a coverage radius, inter-station distance of each of said corresponding first candidate cells, comprises:

determining a target coverage radius of each candidate cell, wherein the target coverage radius is the maximum value of the coverage radius of each candidate cell and a corresponding service cell;

and adding the candidate cells meeting the second preset condition into the corresponding conflict cell set of the service cell, wherein the second preset condition is that the time-frequency code resources of the candidate cells are the same as the time-frequency code resources of the service cell, and the inter-station distance of the candidate cells is smaller than twice the target coverage radius.

10. The method for processing the root sequence index RSI conflict according to claim 1, wherein said serving cell is a suspicious cell with a coverage radius greater than a preset coverage radius threshold;

determining a second candidate cell set corresponding to each service cell according to other suspicious cells except the service cell, wherein the suspicious cells are in the range of twice the coverage radius of each service cell and have the same time-frequency code resource as that of each service cell;

and according to the engineering parameter table, the measurement report data corresponding to each service cell and the measurement report data of each candidate cell in the corresponding second candidate cell set, carrying out RSI conflict detection on each service cell and each corresponding candidate cell, and obtaining a cell which has RSI conflict with each service cell.

11. The method for processing a root sequence index RSI conflict according to any one of claims 1-10, wherein said performing RSI conflict detection on each of said serving cells according to measurement report data corresponding to each of said serving cells in a preset engineering parameter table, after obtaining a cell having an RSI conflict with each of said serving cells, further comprises:

Determining a multiplexing distance corresponding to each service cell according to the double coverage radius of each service cell and the maximum inter-station distance corresponding to the cell where the RSI conflict occurs in each service cell;

and reconfiguring the RSI of each serving cell based on the multiplexing distance corresponding to each serving cell.

12. A server comprising a processor, a memory, a computer program stored on the memory and executable by the processor, and a data bus for enabling a connection communication between the processor and the memory, wherein the computer program when executed by the processor implements a method of handling root sequence index RSI collision according to any of claims 1 to 11.

13. A storage medium for readable storage, wherein the storage medium stores one or more programs executable by one or more processors to implement a method of processing root sequence index RSI collision according to any of claims 1 to 11.