CN105391669B - A kind of power line communication frequency spectrum fragment method for sorting and device - Google Patents
A kind of power line communication frequency spectrum fragment method for sorting and device Download PDFInfo
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- CN105391669B CN105391669B CN201410455381.2A CN201410455381A CN105391669B CN 105391669 B CN105391669 B CN 105391669B CN 201410455381 A CN201410455381 A CN 201410455381A CN 105391669 B CN105391669 B CN 105391669B
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- frequency band
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- subcarrier
- idle frequency
- collection
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- 238000001228 spectrum Methods 0.000 title claims abstract description 86
- 238000004891 communication Methods 0.000 title claims abstract description 31
- 239000012634 fragment Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 8
- 239000012141 concentrate Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
Abstract
The invention discloses a kind of power line communication frequency spectrum fragment method for sorting and device, wherein, this method includes：The continuous idle frequency band collection of subcarrier is counted, and is ranked up by the population size of continuous idle frequency band；The spectrum space for needing to empty on continuous idle frequency band collection is specified, the frequency band utilization rate of each subcarrier to that need to empty counts；The subcarrier spectrum of selection frequency band utilization rate maximum is supplied to new business to use.The power line communication frequency spectrum fragment method for sorting and device of the embodiment of the present invention, promote the continuity that ofdm system frequency spectrum uses in PLC, by occupied Spectrum compression within the specific limits.Make idle frequency band between link continuous as far as possible, to optimize resource service condition.
Description
Technical field
The present invention relates to power line communication technology field in the communications field, and in particular, to power line communication frequency spectrum resource
The method and apparatus of distribution.
Background technology
Power line communication (Powerline Communications, PLC) is used as the distinctive communication technology of power industry, gathers around
There is the low huge advantage of wide coverage, cost, be used widely in power user power consumption information acquisition system field.By
Development for many years, Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) are gradual
One of mainstream technology as power line communication, has broad application prospects in intelligent adapted electrical domain.
The new trend developed as OFDM technology in PLC, adaptive OFDM can be moved according to the signal-to-noise ratio of each subcarrier
The distribution subcarrier of state and bit number and transmission power on each subcarrier, effectively reduce noisy channels characteristic to data transfer
Influence.
Although OFDM technology is there is above-mentioned advantage in PLC, there are still some problems：In practical applications due to industry
The granule size of business data packet differs, and causes the idle frequency spectrum resource of link to become discontinuous during Dynamic Resource Allocation for Multimedia,
The problem of producing frequency spectrum fragment, causes system can not carry new business, reduces the resource utilization of ofdm system.
The content of the invention
The present invention is to overcome the idle frequency spectrum resource of OFDM in existing power line communication technology discontinuously to cause resource
The defects of utilization rate declines, according to an aspect of the present invention, proposes a kind of power line communication frequency spectrum fragment method for sorting.
Power line communication frequency spectrum fragment method for sorting according to embodiments of the present invention, including：
The continuous idle frequency band collection of subcarrier is counted, and is ranked up by the population size of continuous idle frequency band；
Specify the spectrum space for needing to empty on continuous idle frequency band collection, the frequency band utilization rate to each subcarrier that need to be emptied
Counted；
The subcarrier spectrum of selection frequency band utilization rate maximum is supplied to new business to use.
The power line communication frequency spectrum fragment method for sorting of the embodiment of the present invention, promotes ofdm system frequency spectrum in PLC to use
Continuity, by occupied Spectrum compression within the specific limits.Make idle frequency band between link continuous as far as possible, to optimize money
Source service condition.
The power line communication frequency spectrum fragment method for sorting of the embodiment of the present invention, to merge the frequency spectrum money on link as far as possible
Source, new business preferably take the frequency band of some heavier loads.To avoid frequency spectrum fragment, the bandwidth request of business should generally be set
Close to by the spectrum position taken, i.e., using maximum frequency band point or minimum frequency band point as originating or end position.Therefore, will
Continuous free time frequency band collection is combined with maximum/minimum frequency band point, and the size asked according to service bandwidth, just can quickly obtain PLC
The distribution of frequency band resource in middle ofdm system.
The present invention is to overcome the idle frequency spectrum resource of OFDM in existing power line communication technology discontinuously to cause resource
The defects of utilization rate declines, according to another aspect of the present invention, proposes a kind of power line communication frequency spectrum fragment collating unit.
Power line communication frequency spectrum fragment collating unit according to embodiments of the present invention, including：
Sort method module, for counting the continuous idle frequency band collection of subcarrier, and it is big by the quantity of continuous idle frequency band
It is small to be ranked up；
Sorting module is specified, it is each to what need to be emptied for specifying the spectrum space for needing to empty on continuous idle frequency band collection
The frequency band utilization rate of subcarrier is counted；
Service selection module, the subcarrier spectrum for selecting frequency band utilization rate maximum are supplied to new business to use.
The power line communication frequency spectrum fragment collating unit of the embodiment of the present invention, promotes ofdm system frequency spectrum in PLC to use
Continuity, by occupied Spectrum compression within the specific limits.Make idle frequency band between link continuous as far as possible, to optimize money
Source service condition.
The power line communication frequency spectrum fragment collating unit of the embodiment of the present invention, to merge the frequency spectrum money on link as far as possible
Source, new business preferably take the frequency band of some heavier loads.To avoid frequency spectrum fragment, the bandwidth request of business should generally be set
Close to by the spectrum position taken, i.e., using maximum frequency band point or minimum frequency band point as originating or end position.Therefore, will
Continuous free time frequency band collection is combined with maximum/minimum frequency band point, and the size asked according to service bandwidth, just can quickly obtain PLC
The distribution of frequency band resource in middle ofdm system.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and attached drawing.
Below by drawings and examples, technical scheme is described in further detail.
Brief description of the drawings
Attached drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the flow chart of power line communication frequency spectrum fragment method for sorting embodiment of the present invention；
Fig. 2 is the structure diagram of power line communication frequency spectrum fragment collating unit embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Protect scope and from the limitation of embodiment.
The technical term of the embodiment of the present invention is defined as follows below：
Frequency band (Frequency Slot, FS)：The frequency spectrum resource of each subcarrier can uniformly be cut into ofdm system
Less particle, is referred to as frequency band.
Continuous free time frequency band collection (Continuous Idea Frequency-Slot Set, CIFSS)：Same subcarrier
In one section of continuous idle frequency band set, may have one or more snippets continuous idle frequency band in a subcarrier.
Maximum frequency band point (Max-Frequency-Slot Point, FSPMAX)：Continuous free time frequency band is concentrated the largest number of
Frequency band, is referred to as maximum frequency band point.
Minimum frequency band point (Min-Frequency-Slot Point, FSPMIN)：Continuous free time frequency band concentrates numbering minimum
Frequency band, is referred to as minimum frequency band point.
For bandwidth request, the frequency spectrum resource of system is limited.The embodiment of the present invention is intended to promote OFDM systems in PLC
The continuity that system frequency spectrum uses, by occupied Spectrum compression within the specific limits.Make idle frequency band between link as far as possible
Continuously, to optimize resource service condition.
To merge the frequency spectrum resource on link as far as possible, new business preferably takes the frequency band of some heavier loads.It is for this reason, right
The utilization power of frequency band is checked included in available spectrum position.
The size of continuous free time frequency band collection is the number for the idle frequency band that window includes.Meanwhile the continuous idle frequency band of setting
It is maximum frequency band point and minimum frequency band point to concentrate numbering maximum with minimum frequency band.To avoid frequency spectrum fragment, the bandwidth of business
Request should be generally next to by the spectrum position that has taken, i.e., as starting or tied using maximum frequency band point or minimum frequency band point
Beam position.In this way, continuous idle frequency band collection is combined with maximum/minimum frequency band point, the size asked according to service bandwidth, just
The distribution of frequency band resource in ofdm system in PLC can quickly be obtained.
As shown in Figure 1, the embodiment of the invention discloses a kind of power line communication frequency spectrum fragment method for sorting, including：
Step 102：The continuous idle frequency band collection of all subcarriers is counted, and is carried out by the population size of continuous idle frequency band
Sequence；
Such as：Subcarrier 1 has two continuous idle frequency band collection Slot1,1(including 7 continuous idle frequency bands) and
Slot2,2(including 5 continuous idle frequency bands), subcarrier 2 have 1 continuous idle frequency band collection Slot2,1It is (continuous comprising 8
Idle frequency band), then the rank results of each idle frequency band collection from big to small are：Slot2,1, Slot1,1, Slot2,2。
Step 104：All continuous idle frequency band collection are included into set S (Csub)；
Such as：Set S (Csub)={ Slot1,1, Slot2,2, Slot2,1}。
Step 106：To meet new bandwidth request, the spectrum space for needing to empty on given continuous idle frequency band collection is
[FSPMAX,FSPMAX- (B-CIFSS)], wherein B is the bandwidth of service request, the frequency in each subcarrier emptied to needs
Gap utilization rate is counted；
Such as：The frequency band utilization rate 60% of subcarrier 1, the frequency band utilization rate of subcarrier 2 is 50%.
Step 108：According to frequency band utilization rate, the spectrum position in the subcarrier of Selection utilization rate maximum, which is supplied to, to be just arrived to
New business.The bandwidth request allocation of new business is close to the idle frequency band collection by the spectrum position taken, i.e., with close to
The maximum frequency band point of idle frequency band collection by the spectrum position of occupancy or minimum frequency band point are as starting or end position；
Such as：The frequency band utilization rate highest (up to 60%) of subcarrier 1, therefore select subcarrier 1；Wherein Slot2,2Close to having accounted for
Spectrum position, sets Slot2,2Minimum frequency band point is as initial position, by Slot2,2Distributing to the new bandwidth to business please
Ask.
Step 110：Above-mentioned steps are carried out according to continuous idle frequency band size successively, until newly arrived business is received,
Or have stepped through and checked all continuous idle frequency bands.
The power line communication frequency spectrum fragment method for sorting of the embodiment of the present invention, promotes ofdm system frequency spectrum in PLC to use
Continuity, by occupied Spectrum compression within the specific limits.Make idle frequency band between link continuous as far as possible, to optimize money
Source service condition.
The power line communication frequency spectrum fragment method for sorting of the embodiment of the present invention, to merge the frequency spectrum money on link as far as possible
Source, new business preferably take the frequency band of some heavier loads.To avoid frequency spectrum fragment, the bandwidth request of business should generally be set
Close to by the spectrum position taken, i.e., using maximum frequency band point or minimum frequency band point as originating or end position.Therefore, will
Continuous free time frequency band collection is combined with maximum/minimum frequency band point, and the size asked according to service bandwidth, just can quickly obtain PLC
The distribution of frequency band resource in middle ofdm system.
As shown in Fig. 2, the invention discloses a kind of 5 power line communication frequency spectrum fragment collating units, including：
Sort method module 10, for counting the continuous idle frequency band collection of subcarrier, and by the quantity of continuous idle frequency band
Size is ranked up；
Sorting module 20 is specified, it is every to what need to be emptied for specifying the spectrum space for needing to empty on continuous idle frequency band collection
The frequency band utilization rate of a subcarrier is counted；
Service selection module 30, the subcarrier spectrum for selecting frequency band utilization rate maximum are supplied to new business to use.
Wherein：In service selection module 30, the bandwidth request allocation of new business is close to by the spectrum position taken
Idle frequency band collection.
Wherein：Service selection module 30, specifically for close to the idle frequency band collection by the spectrum position taken most
Big frequency band point or minimum frequency band point are as starting or end position.
Wherein：Sorting module 20 is specified to be specifically used for, the spectrum space that need to be emptied is [FSPMAX,FSPMAX-(B-
CIFSS)], wherein, FSPMAXFor maximum frequency band point, B is the bandwidth of service request, and CIFSS is continuous idle frequency band collection.
The power line communication frequency spectrum fragment collating unit of the embodiment of the present invention, promotes ofdm system frequency spectrum in PLC to use
Continuity, by occupied Spectrum compression within the specific limits.Make idle frequency band between link continuous as far as possible, to optimize money
Source service condition.
The power line communication frequency spectrum fragment collating unit of the embodiment of the present invention, to merge the frequency spectrum money on link as far as possible
Source, new business preferably take the frequency band of some heavier loads.To avoid frequency spectrum fragment, the bandwidth request of business should generally be set
Close to by the spectrum position taken, i.e., using maximum frequency band point or minimum frequency band point as originating or end position.Therefore, will
Continuous free time frequency band collection is combined with maximum/minimum frequency band point, and the size asked according to service bandwidth, just can quickly obtain PLC
The distribution of frequency band resource in middle ofdm system.
The present invention can have a variety of various forms of embodiments, above by taking Fig. 1-Fig. 2 as an example with reference to attached drawing to this hair
Bright technical solution explanation for example, this is not meant to that the instantiation that the present invention is applied can only be confined to specific flow
Or in example structure, those of ordinary skill in the art are it is to be appreciated that specific embodiment presented above is a variety of
Some examples in its preferred usage, any embodiment for embodying the claims in the present invention should all be wanted in technical solution of the present invention
Within the scope of asking protection.
Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To modify to the technical solution described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent replacement, improvement and so on, should be included in the present invention's
Within protection domain.
Claims (6)
- A kind of 1. power line communication frequency spectrum fragment method for sorting, it is characterised in that including：The continuous idle frequency band collection of subcarrier is counted, and is ranked up by the population size of the continuous idle frequency band, wherein, even Continuous free time frequency band collection is the set of one section of continuous idle frequency band in same subcarrier, may have in a subcarrier one section or The continuous idle frequency band of multistage；The spectrum space for needing to empty on the continuous idle frequency band collection is specified, to the every height that need to be emptied The frequency band utilization rate of carrier wave is counted；The subcarrier spectrum of the frequency band utilization rate maximum is selected to be supplied to new business to use； It is described to specify the spectrum space for needing to empty on continuous idle frequency band collection to specifically include：The spectrum space that need to empty is [FSPMAX,FSPMAX- (B-CIFSS)], wherein, FSPMAXFor maximum frequency band point, B is the bandwidth of service request, and CIFSS is continuous Idle frequency band collection.
- 2. according to the method described in claim 1, it is characterized in that, the subcarrier spectrum of the selection frequency band utilization rate maximum carries Supply new business use further includes：The bandwidth request allocation of the new business is close to the idle frequency by the spectrum position taken Gap collection.
- 3. according to the method described in claim 2, it is characterized in that, the bandwidth request allocation of the new business is close to having taken Spectrum position by idle frequency band collection specifically include：With close to the idle frequency band collection by the spectrum position taken most Big frequency band point or minimum frequency band point are as starting or end position.
- A kind of 4. power line communication frequency spectrum fragment collating unit, it is characterised in that including：Sort method module, for counting the continuous idle frequency band collection of subcarrier, and it is big by the quantity of the continuous idle frequency band It is small to be ranked up, wherein, continuous free time frequency band collection is the set of one section of continuous idle frequency band in same subcarrier, a son There may be one or more snippets continuous idle frequency band in carrier wave；Sorting module is specified, it is each to what need to be emptied for specifying the spectrum space for needing to empty on the continuous idle frequency band collection The frequency band utilization rate of subcarrier is counted；Service selection module, the subcarrier spectrum for selecting the frequency band utilization rate maximum are supplied to new business to use；The specified sorting module is specifically used for, and the spectrum space that need to be emptied is [FSPMAX,FSPMAX- (B-CIFSS)], its In, FSPMAXFor maximum frequency band point, B is the bandwidth of service request, and CIFSS is continuous idle frequency band collection.
- 5. device according to claim 4, it is characterised in that in the service selection module, the bandwidth of the new business Request distribution is close to the idle frequency band collection by the spectrum position taken.
- 6. device according to claim 5, it is characterised in that the service selection module, specifically for close to having accounted for By the use of spectrum position by the idle frequency band collection maximum frequency band point or minimum frequency band point as originating or end position.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410455381.2A CN105391669B (en) | 2014-09-09 | 2014-09-09 | A kind of power line communication frequency spectrum fragment method for sorting and device |
| PCT/CN2015/082689 WO2016037510A1 (en) | 2014-09-09 | 2015-06-29 | Power line communication frequency spectrum defragmentation method and device |
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| CN201410455381.2A CN105391669B (en) | 2014-09-09 | 2014-09-09 | A kind of power line communication frequency spectrum fragment method for sorting and device |
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| CN105391669B true CN105391669B (en) | 2018-04-24 |
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| CN109151830B (en) | 2017-06-15 | 2022-07-29 | 华为技术有限公司 | Method, device, equipment and system for frequency spectrum arrangement |
| CN112714498B (en) * | 2021-01-27 | 2022-08-12 | 四川安迪科技实业有限公司 | Satellite network frequency spectrum defragmentation method, device, system and storage medium |
| CN113258959B (en) * | 2021-04-21 | 2022-10-18 | 北京智芯微电子科技有限公司 | Method and device for determining and aggregating qualified subcarriers of nodes of field area network |
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| CN101765120A (en) * | 2010-01-21 | 2010-06-30 | 华为技术有限公司 | Method and a device allocating distribution type spectrum resource |
| CN101800997A (en) * | 2010-02-24 | 2010-08-11 | 华为技术有限公司 | Frequency spectrum resource allocation method and device |
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| CN102724113A (en) * | 2012-05-31 | 2012-10-10 | 北京邮电大学 | Method for reconstructing frequency slot resources |
| CN103997739A (en) * | 2014-06-11 | 2014-08-20 | 哈尔滨工业大学 | Method for achieving dynamic spectrum allocation in cognitive radio |
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| SE9203384L (en) * | 1992-11-13 | 1993-10-25 | Televerket | Method and apparatus for dynamic allocation of multiple carrier channels for multiple access through frequency multiplexing |
| GB2443009A (en) * | 2006-10-17 | 2008-04-23 | Siconnect Ltd | Optimising data communications in a power line communiation system |
| CN102448126A (en) * | 2010-09-30 | 2012-05-09 | 索尼公司 | Method and device for configuring communication resource collection, and method and system for managing resource |
| CN103327501B (en) * | 2013-05-17 | 2016-01-20 | 北京邮电大学 | Based on the resource allocation methods of distributed fragment concentration degree |
| CN103391258B (en) * | 2013-07-03 | 2017-04-19 | 北京邮电大学 | Resource distribution method and device based on distributed fragment concentration ratios |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101765120A (en) * | 2010-01-21 | 2010-06-30 | 华为技术有限公司 | Method and a device allocating distribution type spectrum resource |
| CN101800997A (en) * | 2010-02-24 | 2010-08-11 | 华为技术有限公司 | Frequency spectrum resource allocation method and device |
| CN102447623A (en) * | 2011-11-22 | 2012-05-09 | 北京邮电大学 | Cascade method of optical network frequency spectrum resource fragments and apparatus thereof |
| CN102724113A (en) * | 2012-05-31 | 2012-10-10 | 北京邮电大学 | Method for reconstructing frequency slot resources |
| CN103997739A (en) * | 2014-06-11 | 2014-08-20 | 哈尔滨工业大学 | Method for achieving dynamic spectrum allocation in cognitive radio |
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| CN105391669A (en) | 2016-03-09 |
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