CN111818597A - LTE micro base station and cell parameter switching method thereof - Google Patents
LTE micro base station and cell parameter switching method thereof Download PDFInfo
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- CN111818597A CN111818597A CN202010548947.1A CN202010548947A CN111818597A CN 111818597 A CN111818597 A CN 111818597A CN 202010548947 A CN202010548947 A CN 202010548947A CN 111818597 A CN111818597 A CN 111818597A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
- H04J3/0617—Systems characterised by the synchronising information used the synchronising signal being characterised by the frequency or phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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Abstract
The application is applicable to the field of communication and provides an LTE micro base station and a method for switching cell parameters. The method comprises the following steps: controlling a frequency sweep processing submodule of an external frequency sweep module or an LTE service processing module to scan and measure frame header offset relative values of all frequency points in a frequency point combination to be configured one by one; when the LTE micro base station is switched from the cell configuration of the first frequency point to the cell configuration of the second frequency point, controlling and sending the relative value of the frame header offset of the first frequency point and the relative value of the frame header offset of the second frequency point to a baseband processing submodule of the LTE service processing module; and controlling a baseband processing submodule of the LTE service processing module to calculate the difference value of the relative values of the frame header offsets of two frequency points before and after switching, and adjusting the position of the frame header according to the difference value to complete the dynamic switching of the cell configuration parameters. The method and the device have the advantages that the method and the device are simple and convenient to realize, the application range is wider, the relevant configuration parameters of the cell switching can be updated quickly and accurately, the complexity of the cell switching is reduced, and the cell switching efficiency is improved.
Description
Technical Field
The application belongs to the field of communication, and particularly relates to an LTE micro base station and a method for switching cell parameters.
Background
At present, except for a macro base station with a wide coverage range, an LTE micro base station is used as a beneficial supplement of a macro base station network, can be deployed in a local blind area and a place with large traffic, and effectively improves the user experience of a 4G data service user. In addition, the demand of LTE micro base stations for various private networks is also increasing. The deployment of the TD-LTE micro base station must be strictly synchronized with the existing macro base station network so as to prevent wireless interference to the macro base station network. Meanwhile, in order to fully utilize the existing frequency band resources, the 4G LTE divides the frequency band resources into different frequency bands, so as to meet various different actual requirements of FDD/TDD, private networks and the like. On one hand, each frequency band resource is divided into a large number of frequency bands according to the LTE characteristic, and can be flexibly configured according to market requirements, so that the market standardization is ensured; on the other hand, for equipment manufacturers, multiple frequency bands are complex in configuration, different requirements need to be adapted, higher requirements are put forward on the reliability and flexibility of equipment, and the complexity of equipment implementation is increased. For the coverage requirements of different operators for various frequency bands, more hardware devices are often required to be equipped to meet the requirements of different frequency bands. For the switching of different configuration parameters, the device often needs to pass through the process of switching cell parameters and restarting the cell, the switching time is long, and the configuration is complex. In addition, in the TD-LTE time division system, it is necessary to ensure that the frame headers of the frequency points are aligned during switching, so as to prevent interference to surrounding neighboring cells, and it is very difficult to measure the frame header offset value of each frequency point in the wireless environment surrounding the base station, which greatly affects the convenience and flexibility of LTE micro base station deployment.
Disclosure of Invention
The application aims to provide an LTE micro base station, a cell parameter switching method thereof and a computer readable storage medium, and aims to solve the problem that when the LTE micro base station switches cell parameters, frame header deviation values of all frequency points in a wireless environment around the base station need to be measured, and convenience and flexibility of LTE micro base station deployment are greatly influenced.
In a first aspect, the present application provides a method for switching cell parameters of an LTE micro base station, where the method includes:
controlling a frequency sweep processing submodule of an external frequency sweep module or an LTE service processing module to scan and measure frame header offset relative values of all frequency points in a frequency point combination to be configured one by one;
when the LTE micro base station is switched from the cell configuration of the first frequency point to the cell configuration of the second frequency point, controlling and sending the relative value of the frame header offset of the first frequency point and the relative value of the frame header offset of the second frequency point to a baseband processing submodule of the LTE service processing module;
and controlling a baseband processing submodule of the LTE service processing module to calculate the difference value of the relative values of the frame header offsets of two frequency points before and after switching, and adjusting the position of the frame header according to the difference value to complete the dynamic switching of the cell configuration parameters.
In a second aspect, the present application provides a computer readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method for LTE micro base station handover cell parameters as described.
In a third aspect, the present application provides a frequency sweep control apparatus, including:
one or more processors;
a memory; and
one or more computer programs, the processor and the memory being connected by a bus, wherein the one or more computer programs are stored in the memory and configured to be executed by the one or more processors, which when executing the computer programs implement the steps of the method of LTE micro base station handover cell parameters as described.
In a fourth aspect, the present application provides an LTE micro base station, including:
one or more processors;
the memory and the LTE service processing module are respectively connected with the processor;
the radio frequency transceiving module is connected with the LTE service processing module;
the receiving and transmitting antenna is connected with the radio frequency receiving and transmitting module; and
one or more computer programs, wherein the one or more computer programs are stored in the memory and configured to be executed by the one or more processors, which when executing the computer programs implement the steps of the method of LTE micro base station handover cell parameters as described.
In the method, due to the fact that the relative values of the frame header offsets of all the frequency points in the frequency point combination to be configured are scanned and measured, when the LTE micro base station is switched from the cell configuration of the first frequency point to the cell configuration of the second frequency point, the baseband processing submodule of the LTE service processing module is controlled to calculate the difference value of the relative values of the frame header offsets of the two frequency points before and after switching, the position of the frame header is adjusted according to the difference value, and dynamic switching of cell configuration parameters is completed. Therefore, accurate frame header offset does not need to be measured, the method is not influenced by coverage of GPS signals or Beidou signals, is simpler and more convenient to realize, has wider application range, can quickly and accurately update relevant configuration parameters for cell switching, reduces the complexity of cell switching, and improves the efficiency of cell switching. For some application scenarios, a frequency scanning control device can be used for flexibly switching cell parameters in real time, so that the number of actually used equipment is reduced. The method and the device accelerate the deployment speed and efficiency of the LTE micro base station, reduce the participation of manual configuration, improve the accuracy of system configuration and effectively improve the working efficiency.
Drawings
Fig. 1 is a flowchart of a method for switching cell parameters of an LTE micro base station according to an embodiment of the present application.
Fig. 2 is a block diagram of a specific structure of a frequency sweep control device according to an embodiment of the present application.
Fig. 3 is a specific structural block diagram of an LTE micro base station according to an embodiment of the present disclosure.
Detailed Description
In order to make the purpose, technical solution and beneficial effects of the present application more clear and more obvious, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
Please refer to fig. 1, which is a flowchart of a method for switching cell parameters of an LTE micro base station according to an embodiment of the present application, where the method for switching cell parameters of an LTE micro base station according to an embodiment of the present application includes the following steps:
s101, controlling a frequency sweep processing submodule of an external frequency sweep module or an LTE service processing module to scan and measure each frequency point in a frequency point combination (F1, F2, …, Fn) to be configured one by one, and obtaining a frame header offset relative value (FO1, FO2, …, FOn) of each frequency point cell; because only the relative value of the frame header offset of the frequency point Fi needs to be measured, and a real value is not needed, an external 1PPS (onepwerspected) does not need to be accessed as an external synchronous clock source during measurement, the influence of GPS signals or Beidou signals is avoided, the realization is simpler and more convenient, and the application range is wider.
In an embodiment of the present application, S101 may specifically be: and controlling a frequency sweep processing submodule of an external frequency sweep module or an LTE service processing module to scan and measure each frequency point in a frequency point combination (F1, F2, … and Fn) to be configured one by one, finding the actual initial position of the subframe number 0 of each frequency point cell in the collected I/Q sample point frame data according to a cell search algorithm, and obtaining the relative value (FO1, FO2, … and FOn) of the frame head offset of each frequency point cell.
The method specifically comprises the following steps:
after the LTE micro base station starts the radio frequency transceiver module to collect I/Q (in-phase/quadrature) signals, the frequency sweep processing submodule of the external frequency sweep module or the LTE service processing module controls (for example, controls through an API (Application Program Interface) message) to scan frequency point combinations (F1, F2, …, Fn) to be configured one by one, and performs a cell search process of each frequency point; in the process of scanning each frequency point in the frequency point combination to be configured one by one, continuously executing the acquisition process of I/Q sampling points, and sequentially switching the receiving frequency Fi of the radio frequency transceiver module to search the corresponding cell. Therefore, the starting positions of the sub-frame numbers 0 for actually acquiring the I/Q samples are theoretically the same. Because the external 1PPS is not connected, the relative value of the frame header offset of each frequency point in the frequency point combination (F1, F2, …, Fn) is not the actual value of the real frame header offset, but the difference of the relative values of the frame header offsets between any 2 frequency points is reliable, so that when the cell parameters are dynamically switched in the operation of the cell, the difference of the relative values of the frame header offsets between 2 frequency points can be used for adjusting the frame header timing sequence of a new cell;
the frequency sweep processing submodule of the external frequency sweep module or the LTE service processing module searches parameters such as cell primary synchronization code, secondary synchronization code, RS Reference Signal and the like according to a cell detection algorithm of a Physical layer, and obtains PCI (Physical cell identifier), RSSI (Received Signal Strength Indication), RSRP (Reference Signal Receiving Power), a relative value FOi of frame header offset of a frequency point Fi and the like, wherein FOi refers to a time difference between frame header time of a subframe number 0 of a cell corresponding to the frequency point Fi and an original subframe 0 of an acquired I/Q Signal, and the relative value of the frame header offset actually takes the number of the I/Q sample as a unit.
The external frequency sweep module may be a frequency sweep connected to a processor of the LTE micro base station.
And S102, in a normal working state of a cell, when the LTE micro base station is switched from the cell configuration of the first frequency point Fi to the cell configuration of the second frequency point Fj, controlling (specifically, through an API (application program interface)) to send a relative value FOi of frame header offset of the first frequency point Fi and a relative value FOj of frame header offset of the second frequency point Fj to a baseband processing submodule of the LTE service processing module.
S103, controlling a baseband processing submodule of the LTE service processing module to calculate a difference deltaFOij (FOj-FOi) of relative values of frame header offsets of two frequency points before and after switching, and adjusting the position of a frame header according to the difference under the condition of keeping a cell running to complete dynamic switching of cell configuration parameters.
In an embodiment of the present application, S103 may specifically include the following steps:
and controlling a baseband processing submodule of the LTE service processing module to calculate a difference deltaFOij (FOj-FOi) of relative values of frame header offsets of two frequency points before and after switching, and dynamically adjusting the position of a frame header of an I/Q sampling point collected by a radio frequency transceiving module according to the difference deltaFOij by the baseband processing submodule so as to quickly complete time domain synchronous switching.
In the embodiment of the application, the relative values of frame header offsets of two frequency points Fi and Fj are the same in the frequency sweeping process and the cell switching process, so that the cell parameters are updated. In actual deployment, the actual frame header offset values of cells with different frequency points are often difficult to be actually measured, and the actual frame header offset values do not need to be measured in the embodiment of the application, so that the difficulty in technical implementation is greatly reduced.
An embodiment of the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the method for switching the cell parameter of the LTE micro base station, provided by an embodiment of the present application.
Fig. 2 shows a specific structural block diagram of a frequency sweep control device according to an embodiment of the present application, where a frequency sweep control device 100 includes: one or more processors 101, a memory 102, and one or more computer programs, wherein the processors 101 and the memory 102 are connected by a bus, the one or more computer programs are stored in the memory 102 and configured to be executed by the one or more processors 101, and the processor 101 when executing the computer programs implements the steps of the method for LTE micro base station handover cell parameters as provided by an embodiment of the present application.
Fig. 3 shows a specific structural block diagram of an LTE micro base station provided in an embodiment of the present application, where the LTE micro base station includes:
one or more processors 201;
a memory 202 and an LTE service processing module 203 respectively connected to the processor 201;
a radio frequency transceiver module 204 connected with the LTE service processing module 203;
a transceiver antenna 205 connected to the rf transceiver module 204; and
one or more computer programs, wherein the one or more computer programs are stored in the memory 202 and configured to be executed by the one or more processors 201, and the processor 201 when executing the computer programs implements the steps of the method for LTE micro base station handover cell parameters as provided by an embodiment of the present application.
The LTE service processing module 203 specifically includes a frequency sweep processing sub-module, a baseband processing sub-module, a synchronization processing sub-module, a protocol layer processing sub-module, and the like. The baseband processing submodule completes an LTE physical layer processing part and is respectively connected with the frequency sweep processing submodule, the synchronous processing submodule and the protocol layer processing submodule to sequentially complete the tasks of frequency sweep processing, time synchronization and MAC layer message processing.
In the method, due to the fact that the relative values of the frame header offsets of all the frequency points in the frequency point combination to be configured are scanned and measured, when the LTE micro base station is switched from the cell configuration of the first frequency point to the cell configuration of the second frequency point, the baseband processing submodule of the LTE service processing module is controlled to calculate the difference value of the relative values of the frame header offsets of the two frequency points before and after switching, the position of the frame header is adjusted according to the difference value, and dynamic switching of cell configuration parameters is completed. Therefore, accurate frame header offset does not need to be measured, the method is not influenced by coverage of GPS signals or Beidou signals, is simpler and more convenient to realize, has wider application range, can quickly and accurately update relevant configuration parameters for cell switching, reduces the complexity of cell switching, and improves the efficiency of cell switching. For some application scenarios, a frequency scanning control device can be used for flexibly switching cell parameters in real time, so that the number of actually used equipment is reduced. The method and the device accelerate the deployment speed and efficiency of the LTE micro base station, reduce the participation of manual configuration, improve the accuracy of system configuration and effectively improve the working efficiency.
It should be understood that the steps in the embodiments of the present application are not necessarily performed in the order indicated by the step numbers. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in various embodiments may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least some of the sub-steps or stages of other steps.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for switching cell parameters of an LTE micro base station is characterized by comprising the following steps:
controlling a frequency sweeping processing submodule of an external frequency sweeping module or an LTE service processing module to scan and measure each frequency point in a frequency point combination to be configured one by one, and obtaining a frame header offset relative value of each frequency point cell;
when the LTE micro base station is switched from the cell configuration of the first frequency point to the cell configuration of the second frequency point, controlling and sending the relative value of the frame header offset of the first frequency point and the relative value of the frame header offset of the second frequency point to a baseband processing submodule of the LTE service processing module;
and controlling a baseband processing submodule of the LTE service processing module to calculate the difference value of the relative values of the frame header offsets of two frequency points before and after switching, and adjusting the position of the frame header according to the difference value to complete the dynamic switching of the cell configuration parameters.
2. The method according to claim 1, wherein the frequency sweep processing submodule controlling the external frequency sweep module or the LTE service processing module scans and measures each frequency point in the frequency point combination to be configured one by one, and the obtaining of the relative value of the frame header offset of each frequency point cell specifically comprises:
and controlling a frequency sweep processing submodule of an external frequency sweep module or an LTE service processing module to scan and measure each frequency point in a frequency point group to be configured one by one, finding the actual initial position of the subframe serial number 0 of each frequency point cell in the collected I/Q sample point frame data according to a cell search algorithm, and obtaining the relative value of the frame header offset of each frequency point cell.
3. The method of claim 1, wherein the controlling the sweep processing submodule of the external sweep module or the LTE service processing module to scan and measure each frequency point in the frequency point combination to be configured one by one, and the obtaining the relative value of the frame header offset of each frequency point cell specifically comprises:
after the LTE micro base station starts a radio frequency transceiver module to collect I/Q signals, the LTE micro base station controls an external frequency sweeping module or a frequency sweeping processing submodule of an LTE service processing module to scan frequency point combinations to be configured one by one, and a cell searching process of each frequency point is carried out; in the process of scanning each frequency point in the frequency point combination to be configured one by one, continuously executing the acquisition process of I/Q sampling points, and sequentially switching the receiving frequency of a radio frequency transceiver module to search a corresponding cell;
the frequency sweep processing submodule of the external frequency sweep module or the LTE service processing module searches a cell main synchronous code, an auxiliary synchronous code and an RS reference signal according to a cell detection algorithm of a physical layer, and obtains a PCI, an RSSI, an RSRP and a relative value of frame header offset of a frequency point, wherein the relative value of the frame header offset of the frequency point refers to a time difference between frame header time of a subframe number 0 of the frequency point corresponding to a cell and an original subframe 0 for acquiring an I/Q signal, and the relative value of the frame header offset is measured by taking the number of I/Q samples as a unit.
4. The method of claim 3, wherein the step of controlling the sweep frequency processing submodule of the external sweep frequency module or the LTE service processing module to scan the frequency point combinations to be configured one by one is specifically as follows:
and controlling the sweep frequency processing submodule of the external sweep frequency module or the LTE service processing module to scan the frequency point combination to be configured one by one through Application Program Interface (API) information.
5. The method according to claim 1, wherein the controlling to send the relative value of the frame header offset of the first frequency point and the relative value of the frame header offset of the second frequency point to the baseband processing sub-module of the LTE service processing module specifically comprises:
and controlling and sending the relative value of the frame header offset of the first frequency point and the relative value of the frame header offset of the second frequency point to a baseband processing submodule of the LTE service processing module through an API (application program interface).
6. The method of claim 1, wherein the controlling the baseband processing sub-module of the LTE service processing module calculates a difference between relative values of frame header offsets of two frequency points before and after the switching, and adjusts a position of a frame header according to the difference to complete the dynamic switching of the cell configuration parameters specifically comprises:
and controlling a baseband processing submodule of the LTE service processing module to calculate a difference value of relative values of frame header offsets of two frequency points before and after switching, and dynamically adjusting the position of a frame header of an I/Q sampling point collected by the radio frequency transceiving module by the baseband processing submodule according to the difference value so as to complete time domain synchronous switching.
7. The method of claim 1, wherein the external frequency sweep module is a frequency sweep connected to a processor of an LTE micro base station.
8. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the method for LTE micro base station handover cell parameters of any of claims 1 to 7.
9. A sweep frequency control apparatus comprising:
one or more processors;
a memory; and
one or more computer programs, the processor and the memory being connected by a bus, wherein the one or more computer programs are stored in the memory and configured to be executed by the one or more processors, characterized in that the processor when executing the computer programs implements the steps of the method for LTE micro base station handover cell parameters of any of claims 1 to 7.
10. An LTE micro base station comprising:
one or more processors;
the memory and the LTE service processing module are respectively connected with the processor;
the radio frequency transceiving module is connected with the LTE service processing module;
the receiving and transmitting antenna is connected with the radio frequency receiving and transmitting module; and
one or more computer programs, wherein the one or more computer programs are stored in the memory and configured to be executed by the one or more processors, wherein the processors, when executing the computer programs, implement the steps of the method for LTE micro base station handover cell parameters of any of claims 1 to 7.
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