CN118041468A - Neighbor cell interference detection method and device, edge service equipment and access network equipment - Google Patents
Neighbor cell interference detection method and device, edge service equipment and access network equipment Download PDFInfo
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Abstract
The invention provides a neighbor cell interference detection method, a neighbor cell interference detection device, edge service equipment and access network equipment, wherein the method comprises the following steps: the edge service equipment acquires signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell; collecting SRS data received by a target cell; performing signal detection and power measurement on SRS data received by a target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell; the neighbor cell interference detection method is a network autonomous behavior, is independent of measurement reporting of a drive test terminal or a commercial terminal, has better controllability and operability, and can perform normalized detection under the condition of not increasing terminal load and power consumption.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for detecting neighbor cell interference, an edge service device, and an access network device.
Background
Drive tests (DRIVE TEST) in wireless network operation and maintenance are an important means of performing wireless network performance assessment and network optimization. The method plays an important role in evaluating service performance, network coverage and network interference in the wireless network and finding out network faults, and provides basis for reasonable planning and optimization of the network. The road test is time and labor-consuming, and the vehicle needs to be driven manually, and the road tester is carried to traverse and drive in the test area to collect data. Coverage areas other than roads are difficult to reach and do not reflect the situation of all coverage areas. The drive test is used as an evaluation means, is only used sporadically, only reflects the condition of measuring the current time, is greatly influenced by transient variation factors, and is difficult to reflect the statistical characteristics of the network in a large quantity of statistics. And the drive test only depends on the measurement of the terminal side, and uplink measurement data cannot be obtained in a fine way without cooperation with the network side. Further, the drive test is performed under the condition that the terminal performs the actual service, and network resources are occupied.
In order to more conveniently perform drive test and reduce operation cost, an MDT (Minimization of DRIVE TEST) technology is introduced in the prior art, and related data required by network optimization is acquired by reporting a measurement report by a commercial terminal of an ordinary user and collecting a measurement result by a base station. The MDT can be used for collecting measurement information of all areas which cannot be collected by traditional drive test. MDT requires the mating of a commercial terminal.
Furthermore, whether drive test or MDT is used, the uplink interference in the system cannot distinguish the interference sources, because it mainly depends on the measurement at the terminal side.
Disclosure of Invention
The invention aims to provide a method and a device for detecting adjacent cell interference, edge service equipment and access network equipment, which are used for solving the problems that in the prior art, the adjacent cell interference is mainly reported by means of measurement of a terminal, so that the load of the terminal is large and interference sources cannot be distinguished.
In order to solve the above-mentioned problems, an embodiment of the present invention provides a method for detecting neighbor cell interference, which is executed by an edge service device disposed at an access network side, and includes:
acquiring signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell;
collecting SRS data received by a target cell;
And performing signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell.
The method for obtaining the interference power of the target cell includes the steps of:
performing signal detection and power measurement on SRS data received by a target cell by using SRS parameters of each cell to obtain the power of SRS of each neighbor cell terminal received by the target cell;
And obtaining an uplink interference value and an interference source of the target cell according to the average value of the SRS power of the terminal of the adjacent cell received by the target cell in the preset time period.
The collecting the SRS data received by the target cell includes:
and acquiring and processing the original channel-level time domain data or the frequency domain data of the target cell according to the first condition information to obtain SRS data received by the target cell.
Wherein the first condition information includes at least one of:
A cell;
a channel;
a frame number;
A time slot number;
Symbols within a slot;
And (5) an acquisition period.
Wherein the target cell comprises one or more of the plurality of cells.
The embodiment of the invention also provides a neighbor cell interference detection device, which comprises:
The first acquisition module is used for acquiring signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell;
the second acquisition module is used for acquiring SRS data received by the target cell;
And the detection module is used for carrying out signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell.
The embodiment of the invention also provides edge service equipment, which comprises a processor and a transceiver, wherein the transceiver is used for receiving and transmitting data under the control of the processor, and the processor is used for executing the following operations:
acquiring signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell;
collecting SRS data received by a target cell;
And performing signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell.
Wherein the processor is further configured to perform the following operations:
performing signal detection and power measurement on SRS data received by a target cell by using SRS parameters of each cell to obtain the power of SRS of each neighbor cell terminal received by the target cell;
And obtaining an uplink interference value and an interference source of the target cell according to the average value of the SRS power of the terminal of the adjacent cell received by the target cell in the preset time period.
Wherein the processor is further configured to perform the following operations:
and acquiring and processing the original channel-level time domain data or the frequency domain data of the target cell according to the first condition information to obtain SRS data received by the target cell.
Wherein the first condition information includes at least one of:
A cell;
a channel;
a frame number;
A time slot number;
Symbols within a slot;
And (5) an acquisition period.
Wherein the target cell comprises one or more of the plurality of cells.
The embodiment of the invention also provides access network equipment which comprises the edge service equipment, a plurality of baseband units connected with the edge service equipment and a radio frequency unit connected with the baseband units through optical fibers.
The embodiment of the invention also provides edge service equipment, which comprises a memory, a processor and a program which is stored in the memory and can run on the processor; the processor implements the neighbor cell interference detection method as described above when executing the program.
The embodiment of the invention also provides a computer readable storage medium having stored thereon a computer program, characterized in that the program when executed by a processor implements the steps in the neighbor cell interference detection method as described above.
The technical scheme of the invention has at least the following beneficial effects:
According to the neighbor cell interference detection method, the neighbor cell interference detection device, the edge service equipment and the access network equipment, the edge service equipment arranged on the access network side collects multi-cell signaling to obtain SRS parameters corresponding to each cell, collects SRS data received by a target cell, and then uses the SRS parameters of each cell to perform signal detection and power measurement on the SRS data received by the target cell to obtain an uplink interference value of the target cell. The neighbor cell interference detection method is a network autonomous behavior, is independent of measurement reporting of a drive test terminal or a commercial terminal, has better controllability and operability, and can perform normalized detection under the condition of not increasing terminal load and power consumption.
Drawings
Fig. 1 shows a schematic diagram of cell interference in a co-frequency networking scenario in the prior art;
fig. 2 is a flowchart illustrating steps of a method for detecting adjacent cell interference according to an embodiment of the present invention;
fig. 3 is a diagram illustrating an application example of a neighboring cell interference detection method according to an embodiment of the present invention;
fig. 4 is a schematic diagram showing a setting position of an edge service device according to an embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a neighboring cell interference detection device according to an embodiment of the present invention;
fig. 6 shows a schematic structural diagram of an edge service device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
In the case of co-channel networking, the main source of intra-system interference in the network is inter-interference between neighboring cells and between users in neighboring cells, and the interference generation mechanism is shown in fig. 1. Due to free propagation of wireless signals, the signals transmitted by the terminal (UE) in fig. 1 may be received by the Cell0 and the Cell1, and the UE may also receive signals of two cells of the Cell0 and the Cell1, which are affected by factors such as antenna orientation, antenna tilt angle, space loss, signal power, distance between the UE and the antenna, and the like. In the downlink direction, the UE accessed under the Cell0 receives the Cell1 downlink signal to become downlink interference to itself; in the uplink direction, a signal transmitted by a UE that has access to Cell0 is a useful signal of Cell0 and also causes uplink interference to Cell 1.
Similarly, more complex interference will be superimposed on each other in more neighbors. The reasonable network planning needs to fully consider various factors such as antenna azimuth, antenna inclination angle, cell coverage, adjacent cell overlapping coverage, downlink power, uplink power control and the like, so that interference among adjacent cells is reduced as much as possible. But it is often difficult for network planning to completely avoid interference within the system. Therefore, analyzing whether the cell has serious intra-system interference and distinguishing the interference source is an important application scene of network intelligence.
In order to achieve the above objective, as shown in fig. 2, an embodiment of the present invention provides a method for detecting neighbor cell interference, which is performed by an edge service device disposed at an access network side, and includes:
Step 201, collecting signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell;
optionally, the edge service equipment in the access network establishes connection with the baseband unit BBU, and interacts SRS parameters of the non-local neighbor cells according to the neighbor cell list;
step 202, collecting SRS data received by a target cell;
And 203, performing signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell.
In the embodiment of the invention, SRS has a plurality of purposes as an uplink reference signal, and users are distinguished by different time-frequency resource positions, different SRS sequences and different cyclic shifts. Because the generated SRS sequences have orthogonality, the SRS data mixed and overlapped among the users can be accurately distinguished as long as the SRS parameters are known according to different SRS parameters of the users, and no matter which cell the users come from.
Optionally, the SRS parameter is used for performing power measurement on the SRS data received by the corresponding cell according to the SRS parameter of the cell. For example, the SRS parameters of the cell include at least one of: time-frequency resource position of SRS, SRS sequence and cyclic shift.
Optionally, the SRS data received by the target cell includes: SRS of the target cell and SRS of other neighboring cells.
As shown in fig. 1, in the case of co-channel networking, although uplink signals transmitted by UEs accessed under Cell0 may cause interference to Cell1, channel estimation and power measurement may still be performed on signals received by Cell1 by using parameters of Cell0 UEs for receiving. The signal receiving process is not limited to the connection relation between the physical radio frequency unit, the baseband unit BBU and the cell, and the radio frequency unit can judge whether the radio frequency unit receives the signal and the power of the user corresponding to the parameters through channel estimation and power measurement when the corresponding parameters exist in the signal data received by the radio frequency unit.
Aiming at the problems, the SRS is applied to uplink interference measurement and uplink interference source identification between adjacent areas, so that the fixed corresponding relation between data and parameters in a cell needs to be broken.
In the scheme, the near-end machine room deployment edge service equipment (also called an edge server) intensively deployed in the baseband unit is responsible for collecting and analyzing signaling and data, summarizing the data and the signaling, breaking signaling barriers among cells, and breaking the one-to-one correspondence of the data and parameters in the cells. And obtaining SRS parameters of each cell based on the signaling.
As an alternative embodiment, step 203 includes:
performing signal detection and power measurement on SRS data received by a target cell by using SRS parameters of each cell to obtain the power of SRS of each neighbor cell terminal received by the target cell;
And obtaining an uplink interference value and an interference source of the target cell according to the average value of the SRS power of the terminal of the adjacent cell received by the target cell in the preset time period.
Optionally, the target cell comprises one or more of the plurality of cells.
In order to meet mobility requirements in a wireless network, coverage areas are typically disposed continuously, and as shown in fig. 3, a downlink signal may be received by a plurality of cells at a certain location, and an uplink signal may also be received by a plurality of cells. This is also the general case in real networks. For example, if it is necessary to know whether or not there is a signal transmitted by a user having access to Cell CellN from among the signals received by Cell0, it is necessary to perform signal reception and power measurement on the signals received by Cell0 using the user parameters of CellN. N is 1,2, … …, i.e., the signal received by Cell0 is traversed to detect whether there are signals from users in other cells. And (3) performing ergodic signal detection on signals received by all cells according to the user parameters of all cells to obtain a table 1.
Table 1 ergodic power measurements
| Cell0 parameter | Cell1 parameter | Cell2 parameter | ............. | CellN parameters | |
| Cell0 data | RSRP0 | RSRP0-1 | RSRP0-2 | ............. | RSRP0-N |
| Cell1 data | RSRP1-0 | RSRP1 | RSRP1-2 | ............. | RSRP1-N |
| Cell2 data | RSRP2-0 | RSRP2-1 | RSRP2 | ............. | RSRP2-N |
| ............. | ............. | ............. | ............. | ............. | ............. |
| CellN data | RSRPN-0 | RSRPN-1 | RSRPN-2 | ............. | RSRPN |
The RSRP M-N in table 1 is the power of the signal received by the cell CellM from the user of the cell CellN. For example, RSRP 0-1 means the power of a signal transmitted by a UE in Cell1 received by Cell 0.
Individual users are insufficient to reflect the general situation of the network due to factors such as location distribution, so that power measurement and statistical average are required to be performed on all users in a neighboring cell in a certain period of time, and the mutual interference power of users in a cell under the situation that the users are generally distributed in each period of time is reflected in a more general sense. In the same-frequency networking network, signals sent by users in a non-own cell are completely interference to the own cell, so the measured signal power is completely regarded as interference power.
According to the statistical result, under the condition of not depending on drive test and MDT, the interference and source in the uplink system are independently measured and evaluated by normalization, and the basis is provided for coverage (weak coverage and overlapping coverage) optimization, switching parameter optimization, antenna industrial parameter optimization, uplink power control optimization and other network optimization in the TDD system.
As an alternative embodiment, step 202 includes:
and acquiring and processing the original channel-level time domain data or the frequency domain data of the target cell according to the first condition information to obtain SRS data received by the target cell.
Wherein the first condition information includes at least one of:
A cell;
a channel;
a frame number;
A time slot number;
Symbols within a slot;
And (5) an acquisition period.
In the embodiment of the invention, the data acquisition processes the original channel-level time domain data or the original channel-level frequency domain data according to the specified conditions. Wherein the specified conditions include, but are not limited to: cell, channel, frame number, slot number, intra-slot symbol, acquisition period. By the limitation of the above specified conditions, the data collection amount will be greatly reduced. The SRS is a periodic signal and the interference measurement does not depend on a single terminal at a time, but adopts a sampling statistical manner. Thus, the acquisition period may be intermittently sampled, such as 160ms before every 1024 radio frames, 320ms before every 2048 radio frames, etc.
Optionally, as shown in fig. 4, in the current wireless communication network, a base station generally adopts a connection form of Radio frequency remote optical fiber, a Radio Unit (RU) is connected with a baseband Unit (BBU) through an optical fiber, the baseband Unit is intensively deployed in a nearby machine room, then an edge service device (may also be called an edge server) is deployed in a near-end machine room intensively deployed in the baseband Unit, the edge server is responsible for collecting and analyzing signaling and data, collecting data and signaling, breaking signaling barriers between cells, breaking the one-to-one correspondence between data and parameters in the cells, and using collected SRS data, separating from a normal baseband processing flow, performing channel estimation and power measurement by traversing a method for analyzing uplink interference between adjacent cells, so that the uplink interference size and interference sources can be accurately analyzed, thereby promoting network intellectualization.
In summary, an edge service device arranged at an access network side acquires multi-cell signaling to obtain SRS parameters corresponding to each cell, acquires SRS data received by a target cell, and then uses the SRS parameters of each cell to perform signal detection and power measurement on the SRS data received by the target cell to obtain an uplink interference value of the target cell; the neighbor cell interference detection method is a network autonomous behavior, is independent of measurement reporting of a drive test terminal or a commercial terminal, has better controllability and operability, and can perform normalized detection under the condition of not increasing terminal load and power consumption.
As shown in fig. 5, an embodiment of the present invention further provides a neighbor cell interference detection apparatus, including:
A first acquisition module 501, configured to acquire signaling of a plurality of cells, and obtain SRS parameters of channel sounding reference signals corresponding to each cell;
A second acquisition module 502, configured to acquire SRS data received by the target cell;
and the detection module 503 is configured to perform signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell, so as to obtain an uplink interference value of the target cell.
It should be noted that, the neighbor cell interference detection apparatus provided in the embodiments of the present invention is an apparatus capable of executing the foregoing neighbor cell interference detection method, and all embodiments of the foregoing neighbor cell interference detection method are applicable to the apparatus, and achieve the same or similar beneficial effects, which are not repeated herein.
As shown in fig. 6, an embodiment of the present invention further provides an edge service apparatus, including a processor 600 and a transceiver 610, the transceiver 610 receiving and transmitting data under the control of the processor 600, the processor 600 being configured to perform the following operations:
acquiring signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell;
collecting SRS data received by a target cell;
And performing signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell.
As an alternative embodiment, the processor is further configured to:
performing signal detection and power measurement on SRS data received by a target cell by using SRS parameters of each cell to obtain the power of SRS of each neighbor cell terminal received by the target cell;
And obtaining an uplink interference value and an interference source of the target cell according to the average value of the SRS power of the terminal of the adjacent cell received by the target cell in the preset time period.
As an alternative embodiment, the processor is further configured to:
and acquiring and processing the original channel-level time domain data or the frequency domain data of the target cell according to the first condition information to obtain SRS data received by the target cell.
As an alternative embodiment, the first condition information includes at least one of:
A cell;
a channel;
a frame number;
A time slot number;
Symbols within a slot;
And (5) an acquisition period.
As an alternative embodiment, the target cell comprises one or more of the plurality of cells.
In summary, an edge service device arranged at an access network side acquires multi-cell signaling to obtain SRS parameters corresponding to each cell, acquires SRS data received by a target cell, and then uses the SRS parameters of each cell to perform signal detection and power measurement on the SRS data received by the target cell to obtain an uplink interference value of the target cell; the neighbor cell interference detection method is a network autonomous behavior, is independent of measurement reporting of a drive test terminal or a commercial terminal, has better controllability and operability, and can perform normalized detection under the condition of not increasing terminal load and power consumption.
It should be noted that, the edge service device provided in the embodiment of the present invention is an edge service device capable of executing the foregoing method for detecting neighboring cell interference, and all embodiments of the foregoing method for detecting neighboring cell interference are applicable to the edge service device, and achieve the same or similar beneficial effects, which are not repeated herein.
The embodiment of the invention also provides access network equipment which comprises the edge service equipment, a plurality of baseband units connected with the edge service equipment and a radio frequency unit connected with the baseband units through optical fibers.
The embodiment of the invention also provides edge service equipment, which comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes each process in the embodiment of the neighbor cell interference detection method as described above when executing the program, and can achieve the same technical effect, and the repetition is avoided, so that the description is omitted.
The embodiment of the present invention also provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor implements each process in the embodiment of the neighbor cell interference detection method as described above, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein. The computer readable storage medium is, for example, a Read-Only Memory (ROM), a random access Memory (Random Access Memory RAM), a magnetic disk or an optical disk.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, magnetic disk storage and optical storage, etc.) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.
These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A neighbor cell interference detection method, performed by an edge service device disposed at an access network side, the method comprising:
acquiring signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell;
collecting SRS data received by a target cell;
And performing signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell.
2. The method of claim 1 wherein performing signal detection and power measurement on SRS data received by the target cell using SRS parameters of each cell to obtain interference power of the target cell comprises:
performing signal detection and power measurement on SRS data received by a target cell by using SRS parameters of each cell to obtain the power of SRS of each neighbor cell terminal received by the target cell;
And obtaining an uplink interference value and an interference source of the target cell according to the average value of the SRS power of the terminal of the adjacent cell received by the target cell in the preset time period.
3. The method of claim 1, wherein the acquiring SRS data received by the target cell comprises:
and acquiring and processing the original channel-level time domain data or the frequency domain data of the target cell according to the first condition information to obtain SRS data received by the target cell.
4. A method according to claim 3, wherein the first condition information comprises at least one of:
A cell;
a channel;
a frame number;
A time slot number;
Symbols within a slot;
And (5) an acquisition period.
5. The method of claim 1, wherein the target cell comprises one or more of the plurality of cells.
6. A neighbor cell interference detection apparatus, comprising:
The first acquisition module is used for acquiring signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell;
the second acquisition module is used for acquiring SRS data received by the target cell;
And the detection module is used for carrying out signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell.
7. An edge serving device comprising a processor and a transceiver, the transceiver receiving and transmitting data under control of the processor, the processor being configured to:
acquiring signaling of a plurality of cells to obtain SRS parameters of channel sounding reference signals corresponding to each cell;
collecting SRS data received by a target cell;
And performing signal detection and power measurement on SRS data received by the target cell by using SRS parameters of each cell to obtain an uplink interference value of the target cell.
8. An access network device, comprising the edge serving device of claim 7, a plurality of baseband units connected to the edge serving device, and a radio frequency unit connected to the baseband units through optical fibers.
9. An edge service device comprising a memory, a processor, and a program stored on the memory and executable on the processor; the method for detecting adjacent cell interference according to any one of claims 1 to 5, wherein the processor executes the program.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the neighbor cell interference detection method as claimed in any one of claims 1-5.
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