CN107920361B - Method and device for adjusting frequency band of cell - Google Patents
Method and device for adjusting frequency band of cell Download PDFInfo
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- CN107920361B CN107920361B CN201610884247.3A CN201610884247A CN107920361B CN 107920361 B CN107920361 B CN 107920361B CN 201610884247 A CN201610884247 A CN 201610884247A CN 107920361 B CN107920361 B CN 107920361B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0242—Determining whether packet losses are due to overload or to deterioration of radio communication conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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Abstract
The embodiment of the invention provides a method for adjusting a cell frequency band and a corresponding device, wherein the method comprises the following steps: measuring interference noise in a cell frequency band, screening out the interference noise higher than a preset threshold from the interference noise, determining the position and the number of physical resource blocks corresponding to the interference noise higher than the preset threshold, judging whether frequency sweeping is carried out according to the position and the number of the physical resource blocks, obtaining the maximum available continuous frequency band according to a frequency sweeping result when the frequency sweeping is needed, and adjusting the cell central frequency point and the frequency band according to the maximum available continuous frequency band, the central frequency point and the frequency band.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for adjusting a cell frequency band.
Background
In a TD-LTE (Long Term Evolution) communication system, uplink and downlink spectrum resources are the same and the channel is symmetrical.
Due to the complex electromagnetic environment of the wireless communication environment, the mixed use of the equipment such as a civil communication operator base station, a broadcast transmitting tower and the like and other wireless communication equipment such as short wave, ultra-short wave, microwave, trunked talkback and the like generates interference on a wireless communication network, thereby causing serious consequences such as communication quality reduction, even communication interruption and the like.
At present, for a frequency band with interference, if the frequency band is determined to be unavailable, an interference frequency band is obtained by artificially querying uplink IOT (Interoperability Tests) or performing frequency sweeping through a frequency spectrograph, and frequency point and frequency band information are artificially modified, so that the frequency band of a base station is ensured to be available.
The selective scheduling of resources is performed by an uplink and downlink frequency band selection method to alleviate electromagnetic interference in a wireless environment, but due to the frequency band selectivity of a channel or the existence of interference, part of resources cannot be scheduled sufficiently, which causes waste of power and causes reduction of the overall throughput of a cell.
The method for improving the signal strength and enhancing the anti-interference capability of communication by artificially reducing the service bandwidth is at the cost of sacrificing the throughput capability of a cell, although the coverage of the cell is increased, the interference cannot be avoided, and the selected frequency band cannot be changed in real time according to the change of the interference noise of the environment.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are proposed to provide a cell band adjustment method and a corresponding apparatus, which overcome or at least partially solve the above problems.
In order to solve the above problem, an embodiment of the present invention discloses a method for adjusting a cell frequency band, where the cell includes a frequency band and a center frequency point, and the method includes:
measuring interference noise in a cell frequency band; the interference noise has a corresponding physical resource block;
screening out interference noise higher than a preset threshold in the frequency band of the cell;
determining the position and the number of the physical resource blocks corresponding to the interference noise higher than the preset threshold;
judging whether to carry out frequency sweeping according to the position and the number of the physical resource blocks;
when frequency sweeping is determined according to the position and the number of the physical resource blocks, frequency sweeping is carried out in the cell frequency band;
obtaining the maximum available continuous frequency band according to the frequency sweeping result;
and adjusting the central frequency point and the frequency band of the cell according to the maximum available continuous frequency band, the central frequency point and the frequency band.
Preferably, the step of determining whether to perform frequency sweeping according to the position and number of the physical resource blocks includes:
judging whether the position of the physical resource block is overlapped with the central frequency point;
if the position of the physical resource block is overlapped with the central frequency point, judging that frequency sweeping needs to be carried out in the cell frequency band;
if the position of the physical resource block is not overlapped with the central frequency point, calculating the ratio of the number of the physical resource blocks to the total number of the physical resource blocks of the cell;
judging whether the ratio exceeds a preset frequency sweeping threshold or not;
and if the ratio exceeds a preset frequency sweeping threshold, judging that frequency sweeping needs to be carried out in the cell frequency band.
Preferably, the frequency sweeping within the cell band comprises:
acquiring a frequency sweep frequency band;
and carrying out frequency sweeping on the cell frequency band according to a preset frequency sweeping step length and the frequency sweeping frequency band.
Preferably, the step of obtaining the maximum available continuous frequency band according to the frequency sweeping result comprises:
acquiring interference noise in a frequency sweep frequency band;
screening out interference noise higher than a preset threshold from the interference noise in the frequency sweep frequency band;
and obtaining the maximum available continuous frequency band based on the interference noise higher than the preset threshold.
Preferably, the step of adjusting the cell center frequency point and the cell frequency band according to the maximum available continuous frequency band, the center frequency point and the frequency band includes:
judging whether the maximum available continuous frequency band is overlapped with the frequency band of the cell; the cell frequency band has a corresponding cell bandwidth;
if the maximum available continuous frequency band is not overlapped with the cell frequency band, judging whether the bandwidth corresponding to the maximum available continuous frequency band is larger than the cell bandwidth or not;
if the bandwidth corresponding to the maximum available continuous frequency band is larger than the bandwidth of the cell, adjusting the central frequency point of the cell to the central frequency point of the maximum available continuous frequency band;
if the bandwidth corresponding to the maximum available continuous frequency band is smaller than the bandwidth of the cell, comparing the bandwidth corresponding to the maximum available continuous frequency band with a plurality of preset bandwidths;
screening the selected bandwidth from the preset bandwidths according to the comparison result;
and adjusting the central frequency point of the cell to be the central frequency point of the maximum available continuous frequency band, and adjusting the bandwidth of the cell to be the selected bandwidth.
Preferably, the method further comprises:
and reporting the center frequency point and the bandwidth of the adjusted cell to an operation maintenance center, wherein the operation maintenance center is used for reestablishing the cell according to the center frequency point and the bandwidth of the adjusted cell.
Preferably, the step of measuring interference noise in the cell frequency band includes:
setting a measurement period;
and measuring the interference noise in the frequency band of the cell according to the measurement period.
The embodiment of the invention also discloses a device for adjusting the frequency band of the cell, which comprises:
the interference noise measurement module is used for measuring interference noise in a cell frequency band; the interference noise has a corresponding physical resource block;
the interference noise screening module is used for screening the interference noise higher than a preset threshold in the frequency band of the cell;
a physical resource block position and number determining module, configured to determine a position and a number of a physical resource block corresponding to the interference noise higher than the preset threshold;
the frequency sweep judging module is used for judging whether frequency sweep is carried out or not according to the position and the number of the physical resource blocks;
the frequency sweeping module is used for carrying out frequency sweeping in the cell frequency band when the frequency sweeping is determined according to the position and the number of the physical resource blocks;
the maximum available continuous frequency band acquisition module is used for acquiring a maximum available continuous frequency band according to the frequency sweeping result;
and the adjusting module is used for adjusting the central frequency point and the frequency band of the cell according to the maximum available continuous frequency band, the central frequency point and the frequency band.
Preferably, the frequency sweep judging module includes:
a central frequency point overlapping judgment submodule for judging whether the position of the physical resource block overlaps with the central frequency point;
the first frequency scanning determining submodule is used for judging that frequency scanning needs to be carried out in the cell frequency band if the position of the physical resource block is overlapped with the central frequency point;
the ratio calculation submodule is used for calculating the ratio of the number of the physical resource blocks to the total number of the physical resource blocks of the cell if the positions of the physical resource blocks are not overlapped with the central frequency point;
the ratio judgment submodule is used for judging whether the ratio exceeds a preset frequency sweeping threshold or not;
and the second frequency sweep determination submodule is used for judging that frequency sweep needs to be carried out in the cell frequency band if the ratio exceeds a preset frequency sweep threshold.
Preferably, the frequency sweep module comprises:
the sweep frequency band acquisition submodule is used for acquiring a sweep frequency band;
and the frequency sweep submodule is used for carrying out frequency sweep on the cell frequency band according to a preset frequency sweep step length and the frequency sweep frequency band.
Preferably, the maximum available continuous band obtaining module includes:
the interference noise acquisition submodule is used for acquiring interference noise in a frequency sweep frequency band;
the interference noise screening submodule is used for screening out interference noise higher than a preset threshold from the interference noise in the frequency sweep frequency band;
and the maximum available continuous frequency band obtaining submodule is used for obtaining the maximum available continuous frequency band based on the interference noise higher than the preset threshold.
Preferably, the adjusting module comprises:
a frequency band overlapping judgment submodule for judging whether the maximum available continuous frequency band overlaps with the frequency band of the cell; the cell frequency band has a corresponding cell bandwidth;
a bandwidth size determining submodule, configured to determine whether a bandwidth corresponding to the maximum available continuous frequency band is greater than a cell bandwidth if the maximum available continuous frequency band is not overlapped with the cell frequency band;
a central frequency point adjusting submodule, configured to adjust a central frequency point of the cell to a central frequency point of the maximum available continuous frequency band if the bandwidth corresponding to the maximum available continuous frequency band is greater than the cell bandwidth;
a bandwidth comparison submodule, configured to compare a bandwidth corresponding to the maximum available continuous frequency band with a plurality of preset bandwidths, if the bandwidth corresponding to the maximum available continuous frequency band is smaller than a cell bandwidth;
the bandwidth selection submodule is used for screening out the selected bandwidth from the preset bandwidths according to the comparison result;
and the bandwidth and center frequency point adjusting submodule is used for adjusting the center frequency point of the cell to the center frequency point of the maximum available continuous frequency band and adjusting the cell bandwidth to the selected bandwidth.
Preferably, the apparatus further comprises:
and the reporting module is used for reporting the adjusted central frequency point and the bandwidth of the cell to an operation maintenance center, and the operation maintenance center is used for reestablishing the cell according to the adjusted central frequency point and the bandwidth of the cell.
Preferably, the interference noise measurement module includes:
the period setting submodule is used for setting a measurement period;
and the measuring submodule is used for measuring the interference noise in the frequency band of the cell according to the measuring period.
The embodiment of the invention has the following advantages:
according to the embodiment of the invention, the interference noise of the cell is measured, whether the cell needs to be swept is determined according to the position and the number of physical resource blocks of the interference noise exceeding a preset threshold, when the frequency sweep is needed, the maximum available continuous frequency band in the frequency sweep result is obtained, the frequency band and the central frequency point of the cell are adjusted according to the maximum available continuous frequency band, the frequency band and the central frequency point of the cell, and the cell is reestablished.
Drawings
Fig. 1 is a flowchart illustrating a first step of a method for adjusting a cell frequency band according to a first embodiment of the present invention;
fig. 2 is a flowchart illustrating steps of a second method for adjusting a cell band according to an embodiment of the present invention;
FIG. 3 is a flow chart of a base station frequency sweep process of the present invention;
FIG. 4 is a flow chart of the internal processing of the sweep function of the present invention;
FIG. 5 is a flow chart of frequency point and bandwidth determination reporting according to the present invention;
fig. 6 is a block diagram illustrating an embodiment of an apparatus for adjusting a cell frequency band according to the present invention;
fig. 7 is a block diagram of another embodiment of an apparatus for adjusting a cell band according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, a flowchart illustrating a first step of a first method for adjusting a cell frequency band according to the present invention is shown, which may specifically include the following steps:
102, screening out interference noise higher than a preset threshold in the frequency band of the cell;
103, determining the position and the number of the physical resource blocks corresponding to the interference noise higher than the preset threshold;
104, judging whether to carry out frequency sweeping according to the position and the number of the physical resource blocks;
105, when frequency sweeping is determined according to the position and the number of the physical resource blocks, frequency sweeping is carried out in the cell frequency band;
106, acquiring a maximum available continuous frequency band according to a frequency sweeping result;
and 107, adjusting the central frequency point and the frequency band of the cell according to the maximum available continuous frequency band, the central frequency point and the frequency band.
In the embodiment of the invention, the interference noise higher than the preset threshold is screened out by measuring the interference noise of the cell, whether the cell needs to be swept is judged according to the position and the number of physical resource blocks of the interference noise, when the position of the physical resource blocks of the interference noise is overlapped with the central frequency point of the cell or the ratio of the number of the physical resource blocks to the total number of the physical resource blocks of the cell exceeds the preset sweep threshold, the base station sweeps the frequency, the maximum available continuous frequency band is obtained according to the sweep result, and the central frequency point and the frequency band of the cell are adjusted according to the maximum available continuous frequency band.
Referring to fig. 2, a flowchart illustrating a second step of the second embodiment of the method for adjusting a cell frequency band of the present invention is shown, which may specifically include the following steps:
Measuring interference noise, mainly measuring noise of a designated frequency band, measuring a difference value between noise signal intensity and a standard value of background noise signal intensity in the designated frequency band, and measuring the interference noise in a cell frequency band for interference noise when the difference value has a certain size and affects communication, wherein the substep of measuring the interference noise in the cell frequency band comprises the following steps:
a substep S11 of setting a measurement period;
and a substep S12 of measuring the interference noise in the cell frequency band according to the measurement period.
In the embodiment of the invention, because the uplink and downlink channels of the TD-LTE have symmetry, the interference noise can be periodically measured only on the uplink channel.
In the embodiment of the present invention, all interference noise in the cell frequency band is measured in step 101, and interference noise higher than a preset threshold can be screened from all interference noise to be used as a basis for whether to perform frequency sweeping, and the specific preset threshold can be set according to an actual situation, which is not limited in the embodiment of the present invention.
PRB (Physical Resource Block) of TD-LTE is obtained by time domain and frequency domain synthesis, the frequency domain is the width of 12 subcarriers, each subcarrier has the bandwidth of 15KHz and 20MHz, a cell comprises 1200 subcarriers, and the total number of effective PRBs is 100, wherein the effective PRBs are 0-99; the bandwidth of 15MHz, contain 900 subcarriers in the cell, 75 effective PRBs.
And 204, judging whether to perform frequency sweeping according to the position and the number of the physical resource blocks.
In practical application, the physical resource blocks of the cell frequency band have positions and numbers, the central frequency point can be determined according to the positions, the frequency band of the cell can be determined according to the central frequency point and the numbers, and then the bandwidth is determined, and whether frequency sweeping is carried out or not can be judged according to the positions and the numbers of the physical resource blocks, and the substeps comprise:
a substep S21 of determining whether the position of the physical resource block overlaps with the center frequency point;
step S22, if the position of the physical resource block is overlapped with the center frequency point, judging that the frequency sweep needs to be carried out in the cell frequency band;
step S23, if the position of the physical resource block is not overlapped with the center frequency point, calculating the ratio of the number of the physical resource block to the total number of the physical resource block of the cell;
a substep S24, judging whether the ratio exceeds a preset sweep frequency threshold;
and a substep S25, if the ratio exceeds a preset frequency sweep threshold, determining that frequency sweep needs to be performed in the cell frequency band.
In the embodiment of the invention, whether the position of a physical resource block of interference noise is overlapped with a central frequency point of a cell is judged, if so, the frequency band of the interference noise covers the frequency band of the cell or is covered by the frequency band of the cell, and at the moment, interference exists and the frequency sweep is needed to be carried out on the cell; if the physical resource blocks of the interference noise are not overlapped with the center frequency points of the cell and are possibly partially overlapped, the ratio of the number of the physical resource blocks of the overlapped part of the interference noise and the cell to the total number of the physical resource blocks of the whole cell needs to be calculated, and when the ratio exceeds a preset frequency sweeping threshold, the frequency sweeping is carried out on the cell. The preset sweep frequency threshold can be set according to actual conditions, when the ratio is small, for example, only 1%, it indicates that the interference is small, the sweep frequency can not be performed, and the specific numerical value can be set according to the actual conditions, which is not limited in the embodiment of the present invention.
In the embodiment of the present invention, the frequency sweeping in the cell frequency band may include the following sub-steps:
substep S31, acquiring a frequency sweep frequency band;
and a substep S32 of performing frequency sweeping in the cell frequency band according to a preset frequency sweeping step length and the frequency sweeping frequency band.
In practical applications, step-by-step frequency sweeping may be performed according to a radio frequency capability of a Remote radio frequency Unit (RRU), for example, the radio frequency capability of the used RRU is 1800-1900MHz, since interference exists in measurement, the frequency sweeping function is started to perform frequency sweeping, the frequency sweeping step length may be set to 20MHz, the first frequency sweeping frequency band is 1800-1820MHz, the second frequency sweeping frequency band is 1820-1840MHz, the third frequency sweeping frequency band is 1840-1860MHz, the fourth frequency sweeping frequency band is 1860-1880MHz, and the fifth frequency sweeping frequency band is 1880-1900MHz, which are only examples, and other values may also be set according to actual situations, which is not limited in this embodiment of the present invention.
And step 206, obtaining the maximum available continuous frequency band according to the frequency sweeping result.
In the embodiment of the present invention, the frequency sweeping is performed to obtain a frequency band after interference noise is eliminated from a cell, that is, an available frequency band, and to fully utilize the frequency band and ensure throughput of the cell, a maximum available continuous frequency band may be obtained in a frequency sweeping result, which specifically includes the following sub-steps:
substep S41, acquiring interference noise in the frequency sweep frequency band;
substep S42, screening out interference noise higher than a preset threshold from the interference noise in the frequency sweep frequency band;
and a substep S43, obtaining a maximum available continuous frequency band based on the interference noise higher than the preset threshold.
In practical application, when the interference noise is higher than a certain threshold, the interference noise affects communication, the interference noise higher than a preset threshold can be screened from all the interference noise obtained by frequency sweeping, the interference noise affecting communication is analyzed, and the maximum available continuous frequency band is obtained. For ease of understanding, the following examples are given:
the radio frequency band of the RRU is 1800 plus 1840MHz, namely the bandwidth is 40MHz, the sweep step length is set to be 20MHz, and after two step-by-step sweeps of the 20MHz bandwidth, the sweep result is obtained that 1800 plus 1810MHz has interference, 1810 plus 1820MHz has no interference, 1820 plus 1825MHz has no interference, 1825 plus 1840MHz has interference, and the maximum available continuous band is 1810 plus 1825MHz at the time. The above is merely an example, and other examples are certainly possible, and the embodiment of the present invention is not limited to this.
And step 207, adjusting the central frequency point and the frequency band of the cell according to the maximum available continuous frequency band, the central frequency point and the frequency band.
In the embodiment of the invention, after the maximum available continuous frequency band is obtained from the frequency sweeping result, the central frequency point and the frequency band of the cell can be adjusted through the following substeps:
substep S51, determining whether the maximum available contiguous frequency band overlaps with the cell frequency band; the cell frequency band has a corresponding cell bandwidth;
substep S52, if the maximum available continuous frequency band is not overlapped with the cell frequency band, determining whether a bandwidth corresponding to the maximum available continuous frequency band is greater than a cell bandwidth;
substep S53, if the bandwidth corresponding to the maximum available continuous frequency band is larger than the bandwidth of the cell, adjusting the central frequency point of the cell to the central frequency point of the maximum available continuous frequency band;
substep S54, if the bandwidth corresponding to the maximum available continuous frequency band is smaller than the cell bandwidth, comparing the bandwidth corresponding to the maximum available continuous frequency band with a plurality of preset bandwidths;
a substep S55 of selecting a selected bandwidth from the preset bandwidths according to the comparison result;
and a substep S56, adjusting the center frequency point of the cell to the center frequency point of the maximum available continuous frequency band, and adjusting the cell bandwidth to the selected bandwidth.
The bandwidth of TD-LTE can be configured arbitrarily, and 6 common bandwidths 1.4M, 3M, 5M, 10M, 15M, and 20M are specified in the protocol. The base station is configured with a center frequency point and a bandwidth for the cell by default, and the frequency band of the cell can be determined according to the center frequency point and the bandwidth.
In the embodiment of the invention, whether the maximum available continuous frequency band is overlapped with the frequency band of the cell is judged, if not, whether the bandwidth corresponding to the maximum available continuous frequency band is larger than the bandwidth of the cell is judged, if so, the central frequency point of the cell is adjusted to be the central frequency point of the maximum available continuous frequency band, and the bandwidth is unchanged; and if the bandwidth is smaller than the bandwidth of the cell, comparing the bandwidth corresponding to the maximum available continuous frequency band with the bandwidths specified in the protocols of the TD-LTE, and selecting the bandwidth of the cell from the bandwidths specified in the protocols of the TD-LTE. For a clearer explanation, the following examples are given:
the radio frequency band of the RRU is 1800 plus 1840MHz, the current radio frequency band is 40MHz, and through two 20MHz bandwidth step frequency sweeps, the interference of 1800 plus 1810MHz is obtained, the interference of 1810 plus 1820MHz is obtained, the interference of 1820 plus 1825MHz is obtained, the interference of 1825 plus 1840MHz is obtained, the maximum available continuous band is 1810 plus 1825MHz at the time, and the bandwidth is 15 MHz.
If the default bandwidth of the cell is 10MHz, and the bandwidth of the maximum available continuous frequency band at this time is 15MHz greater than the bandwidth of the cell, the center frequency point of the cell needs to be adjusted to the center frequency point of the maximum available continuous frequency band of 1817.5MHz, and the bandwidth of the cell is kept unchanged.
If the default bandwidth of the cell is 20MHz, and the bandwidth 15MHz of the maximum available continuous frequency band is smaller than the bandwidth of the cell at this time, the bandwidth 15MHz of the maximum available continuous frequency band is compared with the common bandwidths 1.4M, 3M, 5M, 10M, 15M, and 20M specified in the TD-LTE protocol, so that the bandwidth of the cell can be adjusted to 15M, the frequency band of the cell can be adjusted to 1810 plus 1825MHz, and the center frequency point of the cell is 1817.5 MHz. If the bandwidth corresponding to the maximum available continuous frequency band is 18M, which is between 15M and 20M, the cell bandwidth needs to be adjusted to 15M.
It should be noted that the above is only an example, and when implementing the embodiment of the present invention, the embodiment of the present invention may also be implemented in other ways, which is not limited in this respect.
And step 208, reporting the adjusted central frequency point and bandwidth of the cell to an operation maintenance center, wherein the operation maintenance center is used for reestablishing the cell according to the adjusted central frequency point and bandwidth of the cell.
After receiving the reported interference noise state information, the base station finds the maximum available continuous frequency band, compares the frequency band with the default central frequency point and frequency band of the current cell, confirms the range of the established frequency band of the subsequent cell, confirms the central frequency point, reports new frequency band information and central frequency point information to an OM (Operations and Maintenance center), and the OM reestablishes the cell according to the new central frequency point and frequency band information.
In the embodiment of the invention, the interference noise of a cell is measured firstly, the position and the number of physical resource blocks of the interference noise exceeding a preset threshold are obtained, and frequency sweeping is carried out when the position of the physical resource blocks of the interference noise is overlapped with the central frequency band of the cell or the ratio of the number of the overlapped parts of the physical resource blocks and the physical resource blocks of the cell to the total number of the physical resource blocks of the cell exceeds a preset frequency sweeping threshold; the method comprises the steps of obtaining a maximum available continuous frequency band according to a frequency sweeping result, comparing the maximum available continuous frequency band with a frequency band and a central frequency point of a cell, adjusting the central frequency point and the frequency band of the cell, reporting the adjusted central frequency point and the frequency band to an OM, and reestablishing the cell by the OM according to the central frequency point and the frequency band.
In order to make the embodiments of the present invention better understood by those skilled in the art, fig. 3, fig. 4, and fig. 5 are further described below as an example of the present invention.
Referring to fig. 3, a flow chart of the base station frequency sweep processing of the present invention is shown, and a specific flow may include the following steps:
301, measuring interference noise in a full bandwidth in an uplink period of a physical layer of a base station;
step 302, measuring the position and the number of physical resource blocks which obtain interference noise higher than a preset threshold;
305, acquiring the radio frequency capability of the RRU to perform step-by-step frequency sweeping, wherein the frequency sweeping step length is N (MHz);
and step 308, the base station reactivates the cell after adjusting the central frequency point and the bandwidth.
According to the example, the interference noise of the cell is measured, whether frequency sweeping is carried out or not is determined according to the position and the quantity of the interference noise higher than the preset threshold, finally, the frequency sweeping with the step length of N is carried out according to the radio frequency band of the RRU, the frequency sweeping result is reported, and the central frequency point and the frequency band of the base station are adjusted.
Referring to fig. 4, a flow chart of internal processing of the frequency sweeping function of the present invention is shown, which relates to OM, RRU, HL (high Layer), PL (Physical Layer), and the specific flow is as follows:
10. triggering frequency sweep by a base station OM period T, and issuing a frequency sweep command;
20. judging whether a cell is established, if so, executing 30, and if not, executing 240;
30. sending a sweep frequency starting request message to the HL;
40. receiving a sweep frequency starting response message fed back by the HL;
50. judging whether a user exists in a cell or not; if yes, go to 60, if no, go to 80;
60. informing the HL cell that users exist;
70. HL finishes redirecting or releases all the existing users in the cell;
80. judging whether the HL is processed successfully, if so, executing 90, otherwise, executing 240;
90. sending a frequency point configuration request message to the RRU;
100. receiving a frequency point configuration response message fed back by the RRU;
110. judging whether the RRU is successfully processed, if so, executing 120, and if not, executing 240;
120. sending a sweep request message to the PL;
130. receiving a frequency sweeping result reporting message fed back by PL;
140. judging whether PL processing is successful, if so, executing 150, otherwise, executing 240;
150. judging whether the frequency sweeping is finished, if so, executing 160, otherwise, executing 90;
160. sending a sweep frequency ending request message to the RRU;
170. receiving a sweep frequency ending response message fed back by the RRU;
180. judging whether the RRU is successfully processed, if so, executing 190, and if not, executing 230;
190. sending a sweep frequency ending request message to the RRU;
200. receiving a sweep frequency ending response message fed back by the RRU;
210. judging whether the HL is successfully processed, if so, executing 220, otherwise, executing 230;
220. setting a frequency sweeping success mark;
230. quitting the service in the community;
240. setting a sweep frequency failure mark;
250. and reporting the frequency sweeping result to the base station according to the frequency sweeping mark.
After receiving the frequency sweep instruction, OM of the base station informs HL, all users in the cell are released or redirected to other cells, then the RRU is informed to close downlink transmission, only uplink signals are received, interference noise measurement is carried out according to all frequency bands in the radio frequency band of the RRU according to step length, and after the measurement is finished, interference noise information in the radio frequency band of the RRU is reported.
Referring to fig. 5, a flow chart for frequency point and bandwidth determination reporting according to the present invention is shown, which specifically includes the following steps:
After receiving the reported state information of the interference noise, the base station finds the maximum available continuous frequency band, compares the maximum available continuous frequency band with the default central frequency point and frequency band of the current cell, confirms the establishment frequency band of the subsequent cell, confirms the central frequency point, reports new frequency band information and central frequency point information to the OM, and the OM reestablishes the cell according to the new central frequency point and frequency band information.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 6, a block diagram of a cell band adjustment apparatus according to an embodiment of the present invention is shown, which may specifically include the following modules:
an interference noise measurement module 501, configured to measure interference noise in a cell frequency band; the interference noise has a corresponding physical resource block;
an interference noise screening module 502, configured to screen interference noise higher than a preset threshold in the cell frequency band;
a physical resource block position and number determining module 503, configured to determine a position and a number of a physical resource block corresponding to the interference noise higher than the preset threshold;
a frequency sweep judging module 504, configured to judge whether to perform frequency sweep according to the position and the number of the physical resource blocks;
a frequency sweep module 505, configured to perform frequency sweep within the cell frequency band when frequency sweep is determined according to the position and the number of the physical resource blocks;
a maximum available continuous frequency band obtaining module 506, configured to obtain a maximum available continuous frequency band according to the frequency sweeping result;
and an adjusting module 507, configured to adjust the central frequency point and the frequency band of the cell according to the maximum available continuous frequency band, the central frequency point, and the frequency band.
Referring to fig. 7, a block diagram of another embodiment of a cell band adjustment apparatus according to the present invention is shown, and in another embodiment of the present invention, the apparatus may further include:
a reporting module 508, configured to report the adjusted central frequency point and bandwidth of the cell to an operation and maintenance center, where the operation and maintenance center is configured to reestablish the cell according to the adjusted central frequency point and bandwidth of the cell.
In a preferred embodiment of the present invention, the frequency sweep determining module 504 includes:
a central frequency point overlapping judgment submodule for judging whether the position of the physical resource block overlaps with the central frequency point;
the first frequency scanning determining submodule is used for judging that frequency scanning needs to be carried out in the cell frequency band if the position of the physical resource block is overlapped with the central frequency point;
the ratio calculation submodule is used for calculating the ratio of the number of the physical resource blocks to the total number of the physical resource blocks of the cell if the positions of the physical resource blocks are not overlapped with the central frequency point;
the ratio judgment submodule is used for judging whether the ratio exceeds a preset frequency sweeping threshold or not;
and the second frequency sweep determination submodule is used for judging that frequency sweep needs to be carried out in the cell frequency band if the ratio exceeds a preset frequency sweep threshold.
In a preferred embodiment of the present invention, the frequency sweep module 505 comprises:
the sweep frequency band acquisition submodule is used for acquiring a sweep frequency band;
and the frequency sweep submodule is used for carrying out frequency sweep on the cell frequency band according to a preset frequency sweep step length and the frequency sweep frequency band.
In a preferred embodiment of the present invention, the maximum available continuous band obtaining module 506 includes:
the interference noise acquisition submodule is used for acquiring interference noise in a frequency sweep frequency band;
the interference noise screening submodule is used for screening out interference noise higher than a preset threshold from the interference noise in the frequency sweep frequency band;
and the maximum available continuous frequency band obtaining submodule is used for obtaining the maximum available continuous frequency band based on the interference noise higher than the preset threshold.
In a preferred embodiment of the present invention, the adjusting module 507 includes:
a frequency band overlapping judgment submodule for judging whether the maximum available continuous frequency band overlaps with the frequency band of the cell; the cell frequency band has a corresponding cell bandwidth;
a bandwidth size determining submodule, configured to determine whether a bandwidth corresponding to the maximum available continuous frequency band is greater than a cell bandwidth if the maximum available continuous frequency band is not overlapped with the cell frequency band;
a central frequency point adjusting submodule, configured to adjust a central frequency point of the cell to a central frequency point of the maximum available continuous frequency band if the bandwidth corresponding to the maximum available continuous frequency band is greater than the cell bandwidth;
a bandwidth comparison submodule, configured to compare a bandwidth corresponding to the maximum available continuous frequency band with a plurality of preset bandwidths, if the bandwidth corresponding to the maximum available continuous frequency band is smaller than a cell bandwidth;
the bandwidth selection submodule is used for screening out the selected bandwidth from the preset bandwidths according to the comparison result;
and the bandwidth and center frequency point adjusting submodule is used for adjusting the center frequency point of the cell to the center frequency point of the maximum available continuous frequency band and adjusting the cell bandwidth to the selected bandwidth.
In a preferred embodiment of the present invention, the interference noise measurement module 501 includes:
the period setting submodule is used for setting a measurement period;
and the measuring submodule is used for measuring the interference noise in the frequency band of the cell according to the measuring period.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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 terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory 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 terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal 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 terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method and the device for adjusting the cell frequency band provided by the invention are introduced in detail, and a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. A method for adjusting a cell frequency band is characterized in that the cell comprises a frequency band and a center frequency point, and the method comprises the following steps:
measuring interference noise in a cell frequency band; the interference noise has a corresponding physical resource block;
screening out interference noise higher than a preset threshold in the frequency band of the cell;
determining the position and the number of the physical resource blocks corresponding to the interference noise higher than the preset threshold;
judging whether to carry out frequency sweeping according to the position and the number of the physical resource blocks;
when frequency sweeping is determined according to the position and the number of the physical resource blocks, frequency sweeping is carried out in the cell frequency band;
obtaining the maximum available continuous frequency band according to the frequency sweeping result;
adjusting the central frequency point and the frequency band of the cell according to the maximum available continuous frequency band, the central frequency point and the frequency band;
the step of adjusting the central frequency point and the frequency band of the cell according to the maximum available continuous frequency band, the central frequency point and the frequency band comprises the following steps:
judging whether the maximum available continuous frequency band is overlapped with the frequency band of the cell; the cell frequency band has a corresponding cell bandwidth;
if the maximum available continuous frequency band is not overlapped with the cell frequency band, judging whether the bandwidth corresponding to the maximum available continuous frequency band is larger than the cell bandwidth or not;
if the bandwidth corresponding to the maximum available continuous frequency band is larger than the bandwidth of the cell, adjusting the central frequency point of the cell to the central frequency point of the maximum available continuous frequency band;
if the bandwidth corresponding to the maximum available continuous frequency band is smaller than the bandwidth of the cell, comparing the bandwidth corresponding to the maximum available continuous frequency band with a plurality of preset bandwidths;
screening the selected bandwidth from the preset bandwidths according to the comparison result;
and adjusting the central frequency point of the cell to be the central frequency point of the maximum available continuous frequency band, and adjusting the bandwidth of the cell to be the selected bandwidth.
2. The method according to claim 1, wherein the step of determining whether to perform frequency sweeping according to the location and number of the physical resource blocks comprises:
judging whether the position of the physical resource block is overlapped with the central frequency point;
if the position of the physical resource block is overlapped with the central frequency point, judging that frequency sweeping needs to be carried out in the cell frequency band;
if the position of the physical resource block is not overlapped with the central frequency point, calculating the ratio of the number of the physical resource blocks to the total number of the physical resource blocks of the cell;
judging whether the ratio exceeds a preset frequency sweeping threshold or not;
and if the ratio exceeds a preset frequency sweeping threshold, judging that frequency sweeping needs to be carried out in the cell frequency band.
3. The method of claim 2, wherein sweeping the frequency within the cell band comprises:
acquiring a frequency sweep frequency band;
and carrying out frequency sweeping on the cell frequency band according to a preset frequency sweeping step length and the frequency sweeping frequency band.
4. The method as claimed in claim 3, wherein the step of obtaining the maximum available continuous band according to the frequency sweeping result comprises:
acquiring interference noise in a frequency sweep frequency band;
screening out interference noise higher than a preset threshold from the interference noise in the frequency sweep frequency band;
and obtaining the maximum available continuous frequency band based on the interference noise higher than the preset threshold.
5. The method of claim 4, further comprising:
and reporting the center frequency point and the bandwidth of the adjusted cell to an operation maintenance center, wherein the operation maintenance center is used for reestablishing the cell according to the center frequency point and the bandwidth of the adjusted cell.
6. The method of claim 1, wherein the step of measuring the interference noise in the cell band comprises:
setting a measurement period;
and measuring the interference noise in the frequency band of the cell according to the measurement period.
7. The utility model provides an adjusting device of district frequency channel which characterized in that, the district includes frequency channel and central frequency point, the device includes:
the interference noise measurement module is used for measuring interference noise in a cell frequency band; the interference noise has a corresponding physical resource block;
the interference noise screening module is used for screening the interference noise higher than a preset threshold in the frequency band of the cell;
a physical resource block position and number determining module, configured to determine a position and a number of a physical resource block corresponding to the interference noise higher than the preset threshold;
the frequency sweep judging module is used for judging whether frequency sweep is carried out or not according to the position and the number of the physical resource blocks;
the frequency sweeping module is used for carrying out frequency sweeping in the cell frequency band when the frequency sweeping is determined according to the position and the number of the physical resource blocks;
the maximum available continuous frequency band acquisition module is used for acquiring a maximum available continuous frequency band according to the frequency sweeping result;
the adjusting module is used for adjusting the central frequency point and the frequency band of the cell according to the maximum available continuous frequency band, the central frequency point and the frequency band;
the adjustment module includes:
a frequency band overlapping judgment submodule for judging whether the maximum available continuous frequency band overlaps with the frequency band of the cell; the cell frequency band has a corresponding cell bandwidth;
a bandwidth size determining submodule, configured to determine whether a bandwidth corresponding to the maximum available continuous frequency band is greater than a cell bandwidth if the maximum available continuous frequency band is not overlapped with the cell frequency band;
a central frequency point adjusting submodule, configured to adjust a central frequency point of the cell to a central frequency point of the maximum available continuous frequency band if the bandwidth corresponding to the maximum available continuous frequency band is greater than the cell bandwidth;
a bandwidth comparison submodule, configured to compare a bandwidth corresponding to the maximum available continuous frequency band with a plurality of preset bandwidths, if the bandwidth corresponding to the maximum available continuous frequency band is smaller than a cell bandwidth;
the bandwidth selection submodule is used for screening out the selected bandwidth from the preset bandwidths according to the comparison result;
and the bandwidth and center frequency point adjusting submodule is used for adjusting the center frequency point of the cell to the center frequency point of the maximum available continuous frequency band and adjusting the cell bandwidth to the selected bandwidth.
8. The apparatus of claim 7, wherein the sweep frequency judging module comprises:
a central frequency point overlapping judgment submodule for judging whether the position of the physical resource block overlaps with the central frequency point;
the first frequency scanning determining submodule is used for judging that frequency scanning needs to be carried out in the cell frequency band if the position of the physical resource block is overlapped with the central frequency point;
the ratio calculation submodule is used for calculating the ratio of the number of the physical resource blocks to the total number of the physical resource blocks of the cell if the positions of the physical resource blocks are not overlapped with the central frequency point;
the ratio judgment submodule is used for judging whether the ratio exceeds a preset frequency sweeping threshold or not;
and the second frequency sweep determination submodule judges that frequency sweep needs to be carried out in the cell frequency band if the ratio exceeds a preset frequency sweep threshold.
9. The apparatus of claim 8, wherein the sweep module comprises:
the sweep frequency band acquisition submodule is used for acquiring a sweep frequency band;
and the frequency sweep submodule is used for carrying out frequency sweep on the cell frequency band according to a preset frequency sweep step length and the frequency sweep frequency band.
10. The apparatus of claim 9, wherein the maximum available contiguous frequency band obtaining module comprises:
the interference noise acquisition submodule is used for acquiring interference noise in a frequency sweep frequency band;
the interference noise screening submodule is used for screening out interference noise higher than a preset threshold from the interference noise in the frequency sweep frequency band;
and the maximum available continuous frequency band obtaining submodule is used for obtaining the maximum available continuous frequency band based on the interference noise higher than the preset threshold.
11. The apparatus of claim 10, further comprising:
and the reporting module is used for reporting the adjusted central frequency point and the bandwidth of the cell to an operation maintenance center, and the operation maintenance center is used for reestablishing the cell according to the adjusted central frequency point and the bandwidth of the cell.
12. The apparatus of claim 7, wherein the interference noise measurement module comprises:
the period setting submodule is used for setting a measurement period;
and the measuring submodule is used for measuring the interference noise in the frequency band of the cell according to the measuring period.
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| CN113015173B (en) * | 2019-12-19 | 2023-09-22 | 北京新岸线移动多媒体技术有限公司 | Self-adaptive frequency selection method and system for wireless communication system |
| CN113852918A (en) * | 2021-08-12 | 2021-12-28 | 中国电子科技集团公司第五十四研究所 | Method for changing frequency of microwave communication system in case of interference and central station |
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