CN104768159A - Frequency point selection method and device - Google Patents
Frequency point selection method and device Download PDFInfo
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- CN104768159A CN104768159A CN201410001183.9A CN201410001183A CN104768159A CN 104768159 A CN104768159 A CN 104768159A CN 201410001183 A CN201410001183 A CN 201410001183A CN 104768159 A CN104768159 A CN 104768159A
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- frequency
- base station
- service terminal
- moment
- received power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/10—Dynamic resource partitioning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
The invention discloses a frequency point selection method. The method comprises the following steps that: a base station determines the interference value of a server terminal of a cell at a certain moment, and continues to work at a current frequency point if the interference value is smaller than a first threshold value; and if the interference value is not smaller than the first threshold value, the base station performs pilot frequency detection, determines a frequency point with lowest receiving power, and determines whether to switch to another frequency point for working according to a difference value between the current working frequency point and the frequency point with the lowest receiving power. Based on the same invention concept, the invention also provides a device. The frequency resources can be effectively utilized, and the system efficiency is increased.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of frequency point selecting method and device.
Background technology
Along with the development of wireless broad band technology, wireless system can frequency spectrum resource more and more abundanter, become the development trend of wireless communication system more than the broadband system of 100M.
When the system of multiple base station and multiple user is performed for more than the wide-band networking of 100M, in order to effectively utilize frequency resource, the selection of frequency is most important.
For base station and user, limitting by radio frequency and base station disposal ability, preferably select each base station selected 1 frequency often to carry out sending or transmitting, different base station selects different frequencies, thus effectively avoids inter base station interference, maximizes system availability.
In Long Term Evolution (LTE) system of reality, the Dynamic Selection of carrier wave should be disturbed by current frequency, other available frequency disturbed condition determines.When base station is in running order, same frequency can not carry out sending and receiving at synchronization simultaneously, and the frequency interference monitoring if regularly work in base station, can reduce the transmitting time of base station undoubtedly, thus reduces system effectiveness.
Summary of the invention
In view of this, the invention provides a kind of frequency point selecting method and device, effectively can utilize frequency resource, improve system effectiveness.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that
A kind of frequency point selecting method, is applied on the base station in LTE system, the CQI that in reception community, base station, each service terminal reports, and calculate each service terminal in this community in the average channel quality in each moment and record, described method comprises:
A, base station in the average channel quality of synchronization, to obtain in this community service terminal at the interference value in this moment according to each service terminal of record;
B, this base station determine whether interference value is less than the first threshold value, if so, perform step G; Otherwise, perform step C;
C, this base station, to the available frequency of configuration, are carried out pilot frequency point detection and are determined the frequency that received power is minimum;
D, this base station determine that whether frequency that receive frequency is minimum is the frequency of this base station work at present, if so, perform step G; Otherwise, perform step e;
The difference of E, frequency that this base station calculates this base station work at present and the minimum frequency of the received power determined, determines whether this difference is greater than the second threshold value, if so, performs step F; Otherwise, perform step G;
The frequency work that the working frequency points of this base station switches to the received power determined minimum by F, this base station, process ends;
G, this base station are continued in the frequency work of work at present.
A kind of device, can be applicable to the base station in LTE system, this device comprises: record cell, acquiring unit, determining unit and processing unit;
Described record cell, for receiving the CQI that in community, each service terminal reports, calculates each service terminal in this community in the average channel quality in each moment and record;
Described acquiring unit, for according to each service terminal of described recording unit records average channel quality at synchronization, to obtain in this community service terminal at the interference value in this moment;
Described determining unit, for determining whether the interference value that described acquiring unit obtains is less than the first threshold value; Determine that whether frequency that receive frequency that described processing unit is determined is minimum is the frequency of this base station work at present; Determine whether the difference that described processing unit calculates is greater than the second threshold value;
Described processing unit, for when described determining unit determination interference value is less than the first thresholding, or when described determining unit determines that the difference calculated is not more than the second threshold value, continues the frequency work in work at present; When described determining unit determination interference value is not less than the first thresholding, to the available frequency of configuration, carry out pilot frequency point detection and determine the frequency that received power is minimum; When the frequency that described determining unit determination receive frequency is minimum is not the frequency of this base station work at present, the difference of the frequency that the frequency calculating this base station work at present is minimum with the received power determined; When described determining unit determines that the difference calculated is greater than the second threshold value, the working frequency points of this base station is switched to the frequency work that the received power determined is minimum.
In sum, the present invention determines the interference value of the server terminal of certain this community of moment by base station, if be less than the first threshold value, then continue to work at current frequency in base station; Otherwise, carry out alien frequencies detection, determine the frequency that received power is minimum, and determine whether to switch frequency work according to the difference of the frequency of work at present and the minimum frequency of received power, effectively can utilize frequency resource, improve system effectiveness.
Accompanying drawing explanation
Fig. 1 is that specific embodiment of the invention intermediate-frequeney point selects schematic flow sheet;
Fig. 2 is the apparatus structure schematic diagram being applied to above-mentioned technology in the specific embodiment of the invention.
Embodiment
For making object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, scheme of the present invention is described in further detail.
Propose the system of selection of a kind of LTE system intermediate-frequeney point in the embodiment of the present invention, the interference value of the server terminal of certain this community of moment is determined in base station, if be less than the first threshold value, then continue to work at current frequency in base station; Otherwise, carry out alien frequencies detection, determine the frequency that received power is minimum, and determine whether to switch frequency work according to the difference of the frequency of work at present and the minimum frequency of received power, effectively can utilize frequency resource, improve system effectiveness.
The CQI (CQI) that in reception community, base station, each service terminal reports, calculates each service terminal in this community in the average channel quality in each moment and record.
For arbitrary service terminal in the average channel quality computational methods of moment t be:
This service terminal of the CQ1 that this service terminal that moment t receives by base station reports and record to be weighted according to preset weights in the average channel quality in t-1 moment and to sue for peace, as the average channel quality of this service terminal of moment t.
Suppose that service terminal n is C at the COI that t reports
nt (), the average channel quality in the t-1 moment of record is
preset weights is s, then this service terminal n is in the average channel quality of t
be calculated as follows:
Wherein, S is greater than 0 weights being less than 1, is configured according to practical application.
See Fig. 1, Fig. 1 be specific embodiment of the invention intermediate-frequeney point select schematic flow sheet.Concrete steps are:
Step 101, base station in the average channel quality of synchronization, to obtain in this community service terminal at the interference value in this moment according to each service terminal of record.
This step is specially the mean value of each service terminal in this community of record in the average channel quality in this moment, as the interference value of this cell serves terminal in this moment.
It can be obtain in the cycle that base station obtains interference value, namely configures predetermined period then, obtains interference value.Predetermined period comprises multiple moment, and the average channel quality of each service terminal chosen sometime of can sampling calculates, and namely uses the average channel of each service terminal of synchronization to continue to calculate.
Base station also can be Real-time Obtaining when obtaining interference value, and namely each moment obtains an interference value.
During specific implementation, can carry out determining how long obtain an interference value according to embody rule environment and hardware.
That suppose to obtain is the interference value I of service terminal in this community of t
average, and the service terminal in this community is N number of, then
Wherein,
be the average channel quality value of the n-th service terminal in t.
Step 102, base station determines whether interference value is less than the first threshold value, if so, performs step 107; Otherwise, perform step 103.
First threshold value configures according to practical application.
Step 103, this base station, to the available frequency of configuration, is carried out pilot frequency point detection and is determined the frequency that received power is minimum.
When measuring the interference of the available frequency of difference of configuration, descending first subframe of configuration LTE system, monitors the total received power of each available frequency, and does not use this descending first subframe to send.
Monitor the total received power of each available frequency, and the total received power of each available frequency listened to is compared, determine the frequency that received power is minimum.
Step 104, this base station determines that whether frequency that receive frequency is minimum is the frequency of this base station work at present, if so, performs step 107; Otherwise, perform step 105.
Step 105, the difference of the frequency that the frequency that this base station calculates this base station work at present is minimum with the received power determined, determines whether this difference is greater than the second threshold value, if so, performs step 106; Otherwise, perform step 107.
Second threshold value is configured according to practical situations.
Step 106, the frequency work that the working frequency points of this base station switches to the received power determined minimum by this base station, process ends.
Step 107, the frequency work in work at present is continued in this base station.
Based on same inventive concept, the application also proposes a kind of device.It is the apparatus structure schematic diagram being applied to above-mentioned technology in the specific embodiment of the invention see Fig. 2, Fig. 2.This device comprises: record cell 201, acquiring unit 202, determining unit 203 and processing unit 204.
Record cell 201, for receiving the CQI that in community, each service terminal reports, calculates each service terminal in this community in the average channel quality in each moment and record.
Acquiring unit 202, for each service terminal of recording according to record cell 201 average channel quality at synchronization, to obtain in this community service terminal at the interference value in this moment.
Determining unit 203, for determining whether the interference value that acquiring unit 202 obtains is less than the first threshold value; Determine that whether frequency that receive frequency that processing unit 204 is determined is minimum is the frequency of this base station work at present; Determine whether the difference that processing unit 204 calculates is greater than the second threshold value.
Processing unit 204, for when determining unit 203 determines that interference value is less than the first thresholding, or when determining unit 203 determines that the difference calculated is not more than the second threshold value, continues the frequency work in work at present; When determining unit 203 determines that interference value is not less than the first thresholding, to the available frequency of configuration, carry out pilot frequency point detection and determine the frequency that received power is minimum; When determining unit 203 determines that the frequency that receive frequency is minimum is not the frequency of this base station work at present, the difference of the frequency that the frequency calculating this base station work at present is minimum with the received power determined; When determining unit 203 determines that the difference calculated is greater than the second threshold value, the working frequency points of this base station is switched to the frequency work that the received power determined is minimum.
Preferably,
Processing unit 204, specifically for configuration available frequency, carrying out pilot frequency point detects when determining the minimum frequency of received power, when the interference of the available frequency of difference is measured, descending first subframe of configuration LTE system, monitor the total received power of each available frequency, and do not use this descending first subframe to send; Monitor the total received power of each available frequency, and the total received power of each available frequency listened to is compared, determine the frequency that received power is minimum.
Preferably,
Acquiring unit 202, specifically for by the mean value of each service terminal in this community of record in the average channel quality in this moment, as the interference value of this cell serves terminal in this moment.
Preferably,
Record cell 201, this service terminal of the CQ1 that this service terminal received by moment t specifically for base station reports and record to be weighted according to preset weights in the average channel quality in t-1 moment and to sue for peace, as the average channel quality of this service terminal of moment t.
The unit of above-described embodiment can be integrated in one, and also can be separated deployment; A unit can be merged into, also can split into multiple subelement further.
In sum, the present invention determines the interference value of the server terminal of certain this community of moment by base station, if be less than the first threshold value, then continue to work at current frequency in base station; Otherwise, carry out alien frequencies detection, determine the frequency that received power is minimum, and determine whether to switch frequency work according to the difference of the frequency of work at present and the minimum frequency of received power.Not by interference monitoring in the specific embodiment of the invention, just can obtain working point interfere information, therefore, it is possible to effectively utilize frequency resource, improve system effectiveness.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a frequency point selecting method, be applied on the base station in Long Term Evolution LTE system, it is characterized in that, the channel quality indicator CQI that in reception community, base station, each service terminal reports, calculate each service terminal in this community in the average channel quality in each moment and record, described method comprises:
A, base station in the average channel quality of synchronization, to obtain in this community service terminal at the interference value in this moment according to each service terminal of record;
B, this base station determine whether interference value is less than the first threshold value, if so, perform step G; Otherwise, perform step C;
C, this base station, to the available frequency of configuration, are carried out pilot frequency point detection and are determined the frequency that received power is minimum;
D, this base station determine that whether frequency that receive frequency is minimum is the frequency of this base station work at present, if so, perform step G; Otherwise, perform step e;
The difference of E, frequency that this base station calculates this base station work at present and the minimum frequency of the received power determined, determines whether this difference is greater than the second threshold value, if so, performs step F; Otherwise, perform step G;
The frequency work that the working frequency points of this base station switches to the received power determined minimum by F, this base station, process ends;
G, this base station are continued in the frequency work of work at present.
2. method according to claim 1, is characterized in that, step C comprises:
When measuring the interference of the available frequency of difference, descending first subframe of configuration LTE system, monitors the total received power of each available frequency, and does not use this descending first subframe to send;
Monitor the total received power of each available frequency, and the total received power of each available frequency listened to is compared, determine the frequency that received power is minimum.
3. method according to claim 1, is characterized in that, steps A comprises:
By the mean value of each service terminal in this community of record in the average channel quality in this moment, as the interference value of this cell serves terminal in this moment.
4. the method according to claim 1-3 any one, is characterized in that, in this community of described calculating, each service terminal is in the average channel quality in each moment, comprising:
This service terminal of the CQ1 that this service terminal received by moment t reports and record to be weighted according to preset weights in the average channel quality in t-1 moment and to sue for peace, as the average channel quality of this service terminal of moment t.
5. a device, can be applicable to the base station in Long Term Evolution LTE system, it is characterized in that, this device comprises: record cell, acquiring unit, determining unit and processing unit;
Described record cell, for receiving the channel quality indicator CQI that in community, each service terminal reports, calculates each service terminal in this community in the average channel quality in each moment and record;
Described acquiring unit, for according to each service terminal of described recording unit records average channel quality at synchronization, to obtain in this community service terminal at the interference value in this moment;
Described determining unit, for determining whether the interference value that described acquiring unit obtains is less than the first threshold value; Determine that whether frequency that receive frequency that described processing unit is determined is minimum is the frequency of this base station work at present; Determine whether the difference that described processing unit calculates is greater than the second threshold value;
Described processing unit, for when described determining unit determination interference value is less than the first thresholding, or when described determining unit determines that the difference calculated is not more than the second threshold value, continues the frequency work in work at present; When described determining unit determination interference value is not less than the first thresholding, to the available frequency of configuration, carry out pilot frequency point detection and determine the frequency that received power is minimum; When the frequency that described determining unit determination receive frequency is minimum is not the frequency of this base station work at present, the difference of the frequency that the frequency calculating this base station work at present is minimum with the received power determined; When described determining unit determines that the difference calculated is greater than the second threshold value, the working frequency points of this base station is switched to the frequency work that the received power determined is minimum.
6. device according to claim 5, is characterized in that,
Described processing unit, specifically for configuration available frequency, carrying out pilot frequency point detects when determining the minimum frequency of received power, when the interference of the available frequency of difference is measured, descending first subframe of configuration LTE system, monitor the total received power of each available frequency, and do not use this descending first subframe to send; Monitor the total received power of each available frequency, and the total received power of each available frequency listened to is compared, determine the frequency that received power is minimum.
7. device according to claim 6, is characterized in that,
Described acquiring unit, specifically for by the mean value of each service terminal in this community of record in the average channel quality in this moment, as the interference value of this cell serves terminal in this moment.
8. the device according to claim 5-7 any one, is characterized in that,
Described record cell, this service terminal of the CQ1 that this service terminal received by moment t specifically for base station reports and record to be weighted according to preset weights in the average channel quality in t-1 moment and to sue for peace, as the average channel quality of this service terminal of moment t.
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| CN201410001183.9A CN104768159B (en) | 2014-01-02 | 2014-01-02 | A kind of frequency point selecting method and device |
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| CN201410001183.9A CN104768159B (en) | 2014-01-02 | 2014-01-02 | A kind of frequency point selecting method and device |
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Cited By (1)
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| CN114301557A (en) * | 2021-12-16 | 2022-04-08 | 中国人民解放军国防科技大学 | Short wave frequency selection method and system based on combination of prediction data and historical data |
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| CN104768159B (en) | 2018-05-22 |
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