CN101854651A - Frequency band scheduling processing method and device - Google Patents
Frequency band scheduling processing method and device Download PDFInfo
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Abstract
The embodiment of the invention provides a frequency band scheduling processing method and a device. The method comprises the following steps: acquiring a disturbed sub-band from sub-bands corresponding to a subcarrier carrying a data signal by detecting the received data signal; and scheduling the sub-bands except the disturbed sub-band to a terminal or a mobile station. In the embodiment of the invention, a base station acquires the disturbed sub-band from all the sub-bands by detecting the received data signal, wherein the sub-band comprises the subcarrier used for carrying the data signal; and then the base station schedules the sub-bands except the disturbed sub-band to the terminal or the mobile station so as to prevent the data from being transmitted on the disturbed sub-band and realize small expense and low system resource consumption in the scheduling process of the frequency band for avoiding interference.
Description
Technical field
The embodiment of the invention relates to communication technical field, relates in particular to a kind of frequency band scheduling processing method and device.
Background technology
System of broadband wireless communication has obtained fairly large development in recent years, OFDM (Orthogonal Frequency Division Multiplexing wherein, be designated hereinafter simply as: OFDM) technology is with its availability of frequency spectrum height, be easy to various multi-access modes in conjunction with constituting OFDM (Orthogonal Frequency Division Multiple access, be designated hereinafter simply as: OFDMA) multiple advantage such as system is extensively adopted by various broadband wireless communications standards, third generation partner program (the 3rd Generation Partner Project for example, be designated hereinafter simply as: 3GPP) Long Term Evolution (LongTerm Evolution, be designated hereinafter simply as: LTE) technology, 3GPP2 enhancement mode mobile broadband (UltraMobile Broadband, be designated hereinafter simply as: UMB), and U.S. electric and electronic engineering association (The Institute of Electrical and Electronics Engineers is designated hereinafter simply as: IEEE) 802.16 etc.
Enter system after one, system of broadband wireless communication is faced with the different system interference problem that is on the rise.At present, different system interference common in the system of broadband wireless communication has: the interference between (1) system because frequency planning and management are lack of standardization, causes multisystem to take the frequency resource of same frequency range, phase mutual interference between system jointly; Or even different system illegally occupies the frequency resource of legal assignment, not only influence the proper communication of valid system thus, and interference source is difficult to search; (2) interference that produces because of receiver or sender poor performance, for example, sender because of isolating and the bad leakage radiation that produces of filtering performance, causes the frequency of emission to exceed limited range in amplification and frequency conversion, invade adjacent channel, influence the proper communication of other valid system; In addition, if the receiver selectivity is not good, sensitivity inhibition, spurious response etc. also all can cause interference; (3) Intermodulation Interference, when existing more than two with frequently or during the close signal of frequency, they may be modulated to a new frequency to each other mutually, and if this frequency during just in time by the legal use of certain wireless communication system, then this wireless communication system can be subjected to the interference of this intermodulation frequency.
Interference common in the system of broadband wireless communication generally all appears at fixing frequency range, and undisturbed frequency range frequency spectrum is pure.In the OFDM/OFDMA system, because the signal on the different frequency is carried by different subcarriers, the interior subcarrier of fixed range is interfered so fixing frequency is disturbed just, and all the other subcarriers in the system frequency scope are then interference-free.
In order to hide interference, maintain the normal wideband wireless communication system communicating, prior art provides a kind of frequency band scheduling method of hiding that is used to disturb, Fig. 1 is the schematic diagram of existing frequency band scheduling method, this method is: physical sub-carrier 1-20 is summed up as plurality of sub frequency band (sub-band 1-sub-band 5), and between logical sub carrier wave 1-20 and physical sub-carrier 1-20, taked the displacement of direct mapping to concern, for example (Band Adaptive modulationand coding is designated hereinafter simply as: Band AMC) the band-adaptive modulating-coding among the IEEE 802.16e; In Band AMC, for down link, the base station issues feed signals at the full range band, terminal is by after measuring the signal of full range band, measurement result is reported the base station, makes a strategic decision according to this measurement result by the base station, and select wherein as far as possible signal preferably sub-band carry out data dispatching.For example: when subcarrier 7-subcarrier 13 was interfered, the wanted to interfering signal ratio that subcarrier 7-subcarrier 13 pairing sub-bands are measured was higher, and the base station will can not dispatched by chooser carrier wave 7-subcarrier 13 pairing sub-bands thus.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: terminal need be measured, report the signal of full range band, can cause huge feedback overhead thus, and the waste of interface-free resources.
Summary of the invention
The embodiment of the invention provides a kind of frequency band scheduling processing method and device, is implemented in minimizing and disturbs system resource and the expense that consumes in the frequency band scheduling process of hiding.
The embodiment of the invention provides a kind of frequency band scheduling processing method, comprising:
Data-signal by detection receives obtains the sub-band that is disturbed from the pairing sub-band of the subcarrier that carries described data-signal;
To give terminal or travelling carriage except that the dispatching sub-frequency band the described sub-band that is disturbed.
The embodiment of the invention provides a kind of frequency band scheduling processing unit, comprising:
Acquisition module is used for the data-signal that receives by detection, obtains the sub-band that is disturbed from the pairing sub-band of the subcarrier that carries described data-signal;
First scheduler module is used for giving terminal or travelling carriage with the dispatching sub-frequency band except that the sub-band that is disturbed that described acquisition module obtains.
The frequency band scheduling processing method of the embodiment of the invention and device, the data-signal that the base station receives by detection obtains the sub-band that is interfered from all sub-bands, and wherein, sub-band comprises the subcarrier that is used for carry data signals; Terminal or travelling carriage will be given except the dispatching sub-frequency band the sub-band that is interfered in the base station then, and the frequency band scheduling process expense of hiding is little, system resources consumption is low to avoid in the sub-band transmission data of being disturbed, to be implemented in being used for disturbing.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of existing frequency band scheduling method;
Fig. 2 is the flow chart of frequency band scheduling processing method embodiment one of the present invention;
Fig. 3 is the flow chart of frequency band scheduling processing method embodiment two of the present invention;
Fig. 4 is the flow chart of frequency band scheduling processing method embodiment three of the present invention;
Fig. 5 is the schematic diagram of frequency band scheduling processing method embodiment four of the present invention;
Fig. 6 is the schematic diagram of frequency band scheduling processing unit embodiment one of the present invention;
Fig. 7 is the schematic diagram of frequency band scheduling processing unit embodiment two of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 2 is the flow chart of frequency band scheduling processing method embodiment one of the present invention, and as shown in Figure 2, this method comprises:
The embodiment of the invention can be applied in the OFDM/OFDMA system, and based on Band AMC; Wherein, Band AMC is the sub-carrier mapping mode in the OFDM/OFDMA system.
The base station receives data-signal, and detects the intensity of this data-signal, and these data signals carry are on subcarrier, and subcarrier is corresponding with sub-band; The base station is according to testing result then, from the pairing sub-band of the subcarrier of all carry data signals, obtain the sub-band that is disturbed, for example: the base station compares the intensity of detected data-signal with the threshold value that sets in advance, intensity is the sub-band that is disturbed greater than the sub-band of the subcarrier correspondence at the data-signal place of this preset threshold value.Wherein, the intensity of signal can comprise the index of the strong and weak degree of arbitrary gauge signal such as amplitude, field intensity.
The data-signal that the base station receives can be a quiet frame after treatment, also can be the normal data-signal that terminal sends.For quiet frame and normal data-signal, be used to judge that whether it be that the threshold value of the sub-band that disturbed is different.
In order to hide interference, avoid the sub-band transmitting data that is being interfered.After the base station gets access to the sub-band that is disturbed, will give terminal or MS except that the dispatching sub-frequency band the sub-band that is disturbed.Be the base station when the scheduling sublayer frequency band, will not disturb subband allocation to give any terminal or MS, just do not dispatch arbitrary sub-band that is disturbed and transmit data.
Present embodiment by gather and analytically line data carry out Interference Detection and hide, go for time division duplex (Time Division Duplexing, abbreviate as: TDD) system, (Frequency Division Duplexing abbreviates as: FDD) system also to go for Frequency Division Duplexing (FDD).Because TDD system uplink and downlink signals is all in same frequency range, and the uplink and downlink signals of FDD system is not in same frequency range, so when present embodiment is applied in TDD system following time, can realize that the interference of uplink and downlink hides by frequency band scheduling, when present embodiment is applied in FDD system following time, can only realize that up interference hides by frequency band scheduling.
The embodiment of the invention, the data-signal that the base station receives by detection obtains the sub-band that is interfered from all sub-bands; The base station is when the scheduling sublayer frequency band then, and the subband allocation that will be disturbed is not given terminal or travelling carriage, has avoided the sub-band transmission data of being disturbed thus; Because present embodiment is hidden not needing terminal to detect and report under the situation of measurement result of sub-band to have realized disturbing by frequency band scheduling, therefore the frequency band scheduling process expense of hiding is little, system resources consumption is low being used for disturbing.
Fig. 3 is the flow chart of frequency band scheduling processing method embodiment two of the present invention, and on the basis of method embodiment one, as shown in Figure 3, this method comprises:
The intensity of the data-signal that step 301, sense terminals send.
The data-signal that the base station acquisition terminal sends detects the intensity of the data-signal that collects, for example: data-signal is carried out the sub-carrier power analysis of spectrum, can detect the intensity of data-signal then.
The intensity and the pre-set threshold of detected data-signal are compared, if intensity is greater than pre-set threshold, show that then the subcarrier that carries this data-signal has been subjected to interference, the pairing sub-band of the subcarrier that is interfered is labeled as the sub-band that is disturbed.
Wherein, do not having under the situation about disturbing, the power level of the upstream data that the base station collects depends on the situation that data send, so when data-signal is normal signal, the maximum of normal signal power is defined as being used for the above-mentioned threshold value of Interference Detection, when the intensity of the signal that collects is higher than the maximum (promptly greater than threshold value) of normal signal power, assert that promptly the sub-band of this signal correspondence has been subjected to interference.
The base station will be dispatched each sub-frequency bands in the scheduling queue, uses subband allocation is given terminal or MS.After having determined the interference sub-band, will disturb sub-band from scheduling queue, to weed out, can guarantee that thus the base station can not disturb subband allocation to use for terminal or MS.
Dispatching sub-frequency band in the scheduling queue behind step 304, the sub-band that rejecting is disturbed is given terminal or MS.
The base station disturbs sub-band scheduling queue afterwards to dispatch according to weeding out, because the sub-band of base station scheduling all is not interfered, hides so realized disturbing.
The embodiment of the invention, the base station obtains the sub-band that is disturbed by the data-signal that sense terminals sends from all sub-bands; The base station is when the scheduling sublayer frequency band then, and the subband allocation that will be disturbed is not given terminal or travelling carriage, has avoided the sub-band transmission data of being disturbed thus; Because present embodiment is hidden not needing terminal to detect and report under the situation of measurement result of sub-band to have realized disturbing by frequency band scheduling, therefore the frequency band scheduling process expense of hiding is little, system resources consumption is low being used for disturbing.
Fig. 4 is the flow chart of frequency band scheduling processing method embodiment three of the present invention, and on the basis of method embodiment one, as shown in Figure 4, this method comprises:
The scheduler of base station is not dispatched any data on one or several frames of eating dishes without rice or wine, the subframe of eating dishes without rice or wine or the symbol of eating dishes without rice or wine, terminal is temporarily stored in the buffer memory and the temporary transient base station that do not send to earlier with data to be sent after the indication of the not data dispatching that receives scheduler; This moment, the base station received quiet frame, and this quiet frame comprises the data of interference and/or noise, promptly can obtain pure interference or noise by this quiet frame, or the data of interference plus noise; These quiet frame are not useful signals, are created in the noise of this frequency range but come from nature, apparatus etc., and/or come from homologous ray or the different system interference of using similar frequency bands.
The intensity of the data-signal of quiet frame is detected in step 402, base station.
In the present embodiment, what gathered the base station is quiet frame, so do not having under the situation about disturbing, the performance number of the upstream data that the base station collects is the end value of making an uproar, under general environment, the intensity of making an uproar in the end is constant, can rule of thumb be worth thus to determine above-mentioned threshold value, for example determine threshold value be-100～-95dBm.
Utilize quiet frame to carry out the Interference Detection of sub-band in the present embodiment, can be easy to determine threshold value during owing to the use quiet frame, institute is so that Interference Detection is simple more, accurate.
Wherein, corresponding with this data-signal sub-band is the pairing sub-band of subcarrier that is used to carry this data-signal.
The sub-band that step 405, base station will be disturbed is rejected from the scheduling queue of sub-band.
After having determined the interference sub-band, the base station will disturb sub-band to weed out from scheduling queue, can guarantee that thus the base station can not disturb subband allocation to use for terminal or MS.
Dispatching sub-frequency band in the scheduling queue behind the sub-band that step 406, base station are disturbed rejecting is given terminal or MS.
The base station disturbs sub-band scheduling queue afterwards to dispatch according to weeding out, because the sub-band of base station scheduling all is not interfered, hides so realized disturbing.
The embodiment of the invention, the data-signal that the base station receives by detection obtains the sub-band that is disturbed from all sub-bands; Terminal or MS will be given except that the dispatching sub-frequency band the sub-band that is disturbed in the base station then, with the sub-band transmission data of avoiding being disturbed; Because present embodiment is hidden not needing terminal to detect and report under the situation of measurement result of sub-band to have realized disturbing by frequency band scheduling, therefore the frequency band scheduling process expense of hiding is little, system resources consumption is low being used for disturbing; And present embodiment also by using quiet frame to carry out Interference Detection, has been simplified the process of Interference Detection, has improved the accuracy of Interference Detection.
Fig. 5 is the schematic diagram of frequency band scheduling processing method embodiment four of the present invention, and on the basis of method embodiment one, as shown in Figure 5, this method comprises:
The PHY of base station (physics) layer carries out the signals collecting of upstream data, and the upstream data that collects is carried out Interference Detection, detects the position of interference, promptly detects the sub-band that is disturbed; Then interfere information is informed that (Medium access control layer is designated hereinafter simply as: MAC), the sub-band that MAC will be disturbed is recorded as the sub-band that is disturbed for the medium access control preparative layer of base station; The MAC scheduler weeded out this sub-band that is disturbed before scheduling, so that the subband allocation of these not being disturbed in scheduling subsequently uses for any terminal or MS.
Wherein, to the upstream data that collects carry out Interference Detection for example can for: the upstream data that collects is carried out the sub-carrier power analysis of spectrum, then the sub-band that intensity is defined as being disturbed greater than the sub-band of predetermined threshold value.
The embodiment of the invention, the data-signal that the base station receives by detection obtains the sub-band that is disturbed from all sub-bands; Terminal or MS will be given except that the dispatching sub-frequency band the described sub-band that is disturbed in the base station then, with the sub-band transmission data of avoiding being disturbed; Because present embodiment is hidden not needing terminal to detect and report under the situation of measurement result of sub-band to have realized disturbing by frequency band scheduling, therefore the frequency band scheduling process expense of hiding is little, system resources consumption is low being used for disturbing.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; Aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Fig. 6 is the schematic diagram of frequency band scheduling processing unit embodiment one of the present invention, and as shown in Figure 6, this device comprises: the acquisition module 61 and first scheduler module 63.
Frequency band scheduling processing unit in the present embodiment is equivalent to the base station among above-mentioned each method embodiment.
The operation principle of each module in the present embodiment and workflow do not repeat them here referring to the description among above-mentioned each method embodiment.
The embodiment of the invention, the data-signal that acquisition module receives by detection obtains the sub-band that is disturbed from all sub-bands; First scheduler module will be given terminal or travelling carriage except that the dispatching sub-frequency band the sub-band that is disturbed then, with the sub-band transmission data of avoiding being disturbed; Because present embodiment is hidden not needing terminal to detect and report under the situation of measurement result of sub-band to have realized disturbing by frequency band scheduling, therefore the frequency band scheduling process expense of hiding is little, system resources consumption is low being used for disturbing.
Fig. 7 is the schematic diagram of frequency band scheduling processing unit embodiment two of the present invention, and as shown in Figure 7, on the basis of device embodiment one, this device can also comprise: second scheduler module 65.
Rejecting unit 631 is used for the sub-band that is disturbed that acquisition module 61 obtains is rejected from the scheduling queue of sub-band.The dispatching sub-frequency band of the scheduling queue behind the sub-band that scheduling unit 633 is used for 631 rejectings of rejecting unit are disturbed is given terminal or travelling carriage.
Detecting unit 611 is used to detect the intensity of the data-signal that receives.Record cell 613 is used for if the intensity of the data-signal that detecting unit detects greater than pre-set threshold, then is labeled as the sub-band that is disturbed with the pairing sub-band of the subcarrier of carry data signals.
Detecting unit 611 specifically can comprise: first subelement 6111 and second subelement 6113.
First subelement 6111 is used for the intensity of the data-signal of sense terminals transmission.Second subelement 6113 is used to detect the intensity of the data-signal of the quiet frame that receives.
The workflow of each module and unit and operation principle do not repeat them here referring to the description among above-mentioned each method embodiment in the present embodiment.
The embodiment of the invention, the data-signal that acquisition module receives by detection obtains the sub-band that is disturbed from all sub-bands; First scheduler module will be given terminal or travelling carriage except that the dispatching sub-frequency band the sub-band that is disturbed then, with the sub-band transmission data of avoiding being disturbed; Because present embodiment is hidden not needing terminal to detect and report under the situation of measurement result of sub-band to have realized disturbing by frequency band scheduling, therefore the frequency band scheduling process expense of hiding is little, system resources consumption is low being used for disturbing; And present embodiment also by using quiet frame to carry out Interference Detection, has been simplified the process of Interference Detection, has improved the accuracy of Interference Detection.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a frequency band scheduling processing method is characterized in that, comprising:
Data-signal by detection receives obtains the sub-band that is disturbed from the pairing sub-band of the subcarrier that carries described data-signal;
To give terminal or travelling carriage except that the dispatching sub-frequency band the described sub-band that is disturbed.
2. frequency band scheduling processing method according to claim 1 is characterized in that, the described data-signal that receives by detection obtains the sub-band that is disturbed and comprises from the pairing sub-band of the subcarrier that carries described data-signal:
The intensity of the data-signal that detection receives;
If the intensity of described data-signal is greater than pre-set threshold, the pairing sub-band of subcarrier that then will carry described data-signal is labeled as the sub-band that is disturbed.
3. frequency band scheduling processing method according to claim 2 is characterized in that, the intensity of the data-signal that described detection receives comprises:
The intensity of the data-signal that sense terminals sends; Perhaps
The intensity of the data-signal of the quiet frame that detection receives.
4. frequency band scheduling processing method according to claim 3 is characterized in that, also comprises before the intensity of the data-signal of the quiet frame that described detection receives:
Data dispatching not at least one frame of eating dishes without rice or wine, the subframe of eating dishes without rice or wine or the symbol of eating dishes without rice or wine is to receive described quiet frame.
5. according to the arbitrary described frequency band scheduling processing method of claim 1-4, it is characterized in that described will comprising to terminal or travelling carriage except that the dispatching sub-frequency band the described sub-band that is disturbed:
The described sub-band that is disturbed is rejected from the scheduling queue of sub-band;
Give terminal or travelling carriage with the dispatching sub-frequency band in the described scheduling queue behind the described sub-band that is disturbed of rejecting.
6. a frequency band scheduling processing unit is characterized in that, comprising:
Acquisition module is used for the data-signal that receives by detection, obtains the sub-band that is disturbed from the pairing sub-band of the subcarrier that carries described data-signal;
First scheduler module is used for giving terminal or travelling carriage with the dispatching sub-frequency band except that the sub-band that is disturbed that described acquisition module obtains.
7. frequency band scheduling processing unit according to claim 6 is characterized in that, described acquisition module comprises:
Detecting unit is used to detect the intensity of the data-signal that receives;
Record cell, be used for if the intensity of the described data-signal that described detecting unit detects greater than pre-set threshold, the pairing sub-band of subcarrier that then will carry described data-signal is labeled as the sub-band that is disturbed.
8. frequency band scheduling processing unit according to claim 7 is characterized in that, described detecting unit comprises:
First subelement is used for the intensity of the data-signal that sense terminals sends; And/or
Second subelement is used to detect the intensity of the data-signal of the quiet frame that receives.
9. frequency band scheduling processing unit according to claim 8 is characterized in that, also comprises:
Second scheduler module is used at least one frame of eating dishes without rice or wine, the subframe of eating dishes without rice or wine or the symbol of eating dishes without rice or wine not data dispatching, to receive described quiet frame.
10. according to the arbitrary described frequency band scheduling processing unit of claim 6-9, it is characterized in that described first scheduler module comprises:
Reject the unit, be used for the described sub-band that is disturbed that described acquisition module obtains is rejected from the scheduling queue of sub-band;
Scheduling unit is used for giving terminal or travelling carriage with the dispatching sub-frequency band of the described scheduling queue behind the described sub-band that is disturbed of described rejecting unit rejecting.
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| CN102257845A (en) * | 2011-06-13 | 2011-11-23 | 华为技术有限公司 | Interference analysis method, device and system |
| CN102857930A (en) * | 2011-06-30 | 2013-01-02 | 国际商业机器公司 | Frequency sharing method and device of wireless communication system based on orthogonal frequency division multiplexing (OFDM) |
| CN105517169A (en) * | 2014-09-26 | 2016-04-20 | 成都鼎桥通信技术有限公司 | Scheduling method used for preventing interferences |
| CN105959246A (en) * | 2016-04-22 | 2016-09-21 | 上海瀚讯无线技术有限公司 | Anti-interference method |
| CN110336651A (en) * | 2019-07-05 | 2019-10-15 | 北京神经元网络技术有限公司 | Selection method, device, equipment and the medium of subcarrier |
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