CN102547718B - Based on the discrete spectrum polymerization that maximum space is preferential - Google Patents
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Abstract
The invention discloses a kind of discrete spectrum polymerization preferential based on maximum space, comprise the following steps: S1: by the perception to frequency spectrums of operation, obtain frequency spectrum upstate; S2: can identify by service band continuously on frequency spectrum, obtain frequency band length the longest can service band; S3: calculate the band number that user sends data needs, obtain the user that required band number is maximum; S4: the maximum user priority of described required band number use described frequency band length the longest can service band; S5: upgrade the maximum user of required band number and frequency band length the longest can service band, forward step S4 to, until required band number is 0 or allly can cannot meets the business demand of the minimum user of required band number by service band.The present invention owing to decreasing the protection interval expense between frequency range, thus improves system spectrum utilization ratio.
Description
Technical field
The present invention relates to cognitive radio technology field, particularly relate to a kind of discrete spectrum polymerization preferential based on maximum space.
Background technology
Wireless frequency spectrum is a kind of extremely precious resource, and along with the high speed development of wireless communication technology and people are to the increase of wireless traffic demand, frequency spectrum resource scarcity problem is more and more serious, and research shows that the availability of frequency spectrum of current grant frequency spectrum is very low.Cognitive radio is a kind of technology of then being carried out dynamic frequency spectrum resource distribution by perceived spectral, and its target is realize the recycling of frequency spectrum resource from the various dimensions such as time, space and frequency and share, thus drastically increases spectrum utilization efficiency.
Under practical communication condition, usable spectrum is discontinuous often, i.e. system under discrete spectrum condition.Such as, electric power 230MHz wireless communications mode is called for short 230 private networks, namely data radio station is adopted, the special duplexing frequency of 15 couple and the 10 electric power private wireless communication systems that single power frequency point is built in the 230MHz band limits of National Radio committee electric power load control approval.
According to state without pipe [1991] No. 5 files, " using the frequency range that 223.025 ~ 235.000MHz uses as business such as remote measurement, remote control, transfer of data; wherein 229.0 ~ 235.0MHz frequency range is used for radio astronomy service in Beijing area, and other business must not produce harmful interference to it." band separation is 25kHz, necessary bandwidth is less than 16Khz, therefore, has at least reserved the protection interval of 9kHz between working frequency points.Ministries and commissions and the ham radioes etc. such as this part frequency band available power, oil, army, meteorology, light industry also can use this frequency band.
According to this situation, on discrete spectrum (as 230MHz electric power frequency range), the mode of OFDM can be adopted, the frequency band of a 25kHz designs multiple subcarrier, the frequency band of multiple free time is aggregating and carry comparatively multi-subcarrier, communicate.It should be noted that, a frequency band same time is used by a user only.In addition, described herein " frequency range " be relevant specification of country document definition, a bit of frequency of a terminal use is distributed to according to frequency division manner." frequency band " described herein by after carrying out spectrum aggregating, one or more band frequency that frequency range can be used continuously to form.
In order to compatible original system, need reserved protection interval between different frequency bands.This protection gap length meets relevant criterion and requirement, if state is without pipe [1991] No. 5 documentation requirements.Fig. 1 gives the relation of frequency range, protection interval, subcarrier.User 1,2,3 can use different frequency bands to carry out OFDM respectively, and therefore, different polymerizations, also exists the problem of protection interval quantity, directly had influence on frequency spectrum service efficiency.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: provide a kind of discrete spectrum polymerization preferential based on maximum space, to reduce the protection interval expense between frequency range, improves system spectrum utilization ratio.
(2) technical scheme
For solving the problem, the invention provides a kind of discrete spectrum polymerization preferential based on maximum space, comprising the following steps:
S1: by the perception to frequency spectrums of operation, obtains frequency spectrum upstate;
S2: can identify by service band continuously on frequency spectrum, obtain frequency band length the longest can service band;
S3: calculate the band number that user sends data needs, obtain the user that required band number is maximum;
S4: the band number of service band can cannot meet the business demand of the maximum user of described required band number if all, then no longer bandwidth assignment is carried out to the customer service that this required band number is maximum, but select the larger user of next required band number to replace the maximum user of described required band number, forward step S5 to;
Otherwise: the maximum user priority of described required band number use described frequency band length the longest can service band:
If what described frequency band length was the longest the band number of service band can be more than or equal to the band number of the maximum user's needs of described required band number, then can corresponding frequency range be designated the longest for described frequency band length and used in service band, and recalculate this can the length of service band;
If what described frequency band length was the longest the band number of service band can be less than the band number of the maximum user's needs of described required band number, then can be designated the longest for described frequency band length and used by service band, can the length zero setting of service band by this, recalculate the remaining required band number of the maximum user of described required band number;
S5: upgrade the maximum user of required band number and frequency band length the longest can service band, forward step S4 to, until required band number is 0 or allly can cannot meets the business demand of the minimum user of required band number by service band.
Preferably, described frequency spectrum upstate includes but not limited to the frequency band whether transmission rate that needs to signal to noise ratio and the user of target BS or gateway of free time, idle probability, average free duration, user.
Preferably, single frequency band can only be used by one user simultaneously.
Preferably, during initial phase, if frequency spectrums of operation is divided into N number of sequential frequency band, respectively for M user, described discrete spectrum polymerization specifically comprises following steps:
S101: by the perception to frequency spectrums of operation, obtains the using state of N number of sequential frequency band on frequency spectrum;
S102: according to frequency spectrum service condition, sets up frequency range and uses list { AV
imark frequency range whether can use, wherein i ∈ [1, N] is frequency range identifier number;
S103: to continuously can service band FS on frequency spectrum
k(k>=1) identifies, obtain frequency band length the longest can service band Max (FS
k);
S104: in the continuous situation of calculating frequency band, user sends the band number Demand that data need
j, wherein j ∈ [1, M] is Customs Assigned Number, obtains the user that required band number is maximum;
S105: can service band FS if all
kband number cannot meet the business demand of the maximum user of described required band number, then no longer bandwidth assignment is carried out to the customer service that this required band number is maximum, forwards step S106 to;
Otherwise: the maximum user priority of described required band number use described frequency band length the longest can service band Max (FS
k):
If what described frequency band length was the longest can service band Max (FS
k) band number be more than or equal to band number Max (Demand needed for the maximum user of described required band number
i), then use list { AV at frequency band
iin mark corresponding frequency band used by the user that described required band number is maximum, and recalculate the length of this frequency band;
If what described frequency band length was the longest can service band Max (FS
k) band number be less than band number Max (Demand needed for the maximum user of described required band number
i), then use list { AV at frequency band
iin mark corresponding frequency band used by the user that described required band number is maximum, the length of this frequency band is set to zero, and recalculates the remaining required band number of the maximum user of described required band number;
S106: the user of renewal sends the band number Demand of data needs
jwith continuously can service band FS on frequency spectrum
k, forward rapid S105 to, until required band number is 0, or allly can cannot meet the business demand of the minimum user of required band number by service band.
Preferably, when there is new service needed use frequency spectrum in the system cloud gray model stage, described discrete spectrum polymerization specifically comprises following steps:
S201: by the perception to frequency spectrums of operation, obtains frequency spectrum upstate;
S202: to continuously can service band FS on frequency spectrum
kidentify, obtain frequency band length the longest can service band Max (FS
k);
S203: calculate the band number Demand that user sends data needs
j;
S204: user use described frequency band length the longest can service band Max (FS
k):
If what described frequency band length was the longest can service band Max (FS
k) band number be more than or equal to the band number Demand that user sends data needs
j, then identify corresponding frequency band and used by user, and recalculate the length of this frequency band;
If what described frequency band length was the longest can service band Max (FS
k) band number be less than the band number Demand that user sends data needs
j, then identify corresponding frequency band and used by user, the length of this frequency band is set to zero, and recalculate the remaining required band number Demand of user
j;
S205: upgrade user and send band number Demand needed for business
j, forward step S204 to, be 0 until user sends band number needed for business or allly can cannot meet the business demand of user by service band.
(3) beneficial effect
The present invention's band number needed for subscriber data traffic is how many, selects idle frequency spectrum.The user priority that demand band number is maximum uses maximum continuous idle frequency spectrum, owing to decreasing the protection interval expense between frequency range, thus improves system spectrum utilization ratio.
Accompanying drawing explanation
Fig. 1 is the relation schematic diagram of frequency range, protection interval, subcarrier;
Fig. 2 is the flow chart of steps according to the embodiment of the present invention one discrete spectrum polymerization;
Fig. 3 is the flow chart of steps according to discrete spectrum polymerization during the embodiment of the present invention two initial phase;
Fig. 4 is the flow chart of steps according to the embodiment of the present invention three discrete spectrum polymerization when there being new service needed to use frequency spectrum.
Embodiment
Below in conjunction with drawings and Examples, that the present invention is described in detail is as follows.
Embodiment one:
As shown in Figure 2, the present embodiment describes a kind of discrete spectrum polymerization preferential based on maximum space, it is characterized in that, comprises the following steps:
S1: by the perception to frequency spectrums of operation, obtains frequency spectrum upstate;
Described frequency spectrum upstate includes but not limited to the frequency band whether transmission rate that needs to signal to noise ratio and the user of target BS or gateway of free time, idle probability, average free duration, user;
S2: can identify by service band continuously on frequency spectrum, obtain frequency band length the longest can service band;
S3: calculate the band number that user sends data needs, obtain the user that required band number is maximum;
S4: the band number of service band can cannot meet the business demand of the maximum user of described required band number if all, then no longer bandwidth assignment is carried out to the customer service that this required band number is maximum, but select the larger user of next required band number to replace the maximum user of described required band number, forward step S5 to;
Otherwise: the maximum user priority of described required band number use described frequency band length the longest can service band:
If what described frequency band length was the longest the band number of service band can be more than or equal to the band number of the maximum user's needs of described required band number, then can corresponding frequency range be designated the longest for described frequency band length and used in service band, and recalculate this can the length of service band;
If what described frequency band length was the longest the band number of service band can be less than the band number of the maximum user's needs of described required band number, then can be designated the longest for described frequency band length and used by service band, can the length zero setting of service band by this, recalculate the remaining required band number of the maximum user of described required band number;
S5: upgrade the maximum user of required band number and frequency band length the longest can service band, forward step S4 to, until required band number is 0 or allly can cannot meets the business demand of the minimum user of required band number by service band.
If can cannot meet the business demand of the minimum user of required band number by service band all, then represent and distribute unsuccessfully, current network cannot carry unallocated business; If required band number is 0, then represent that all bandwidth requirements are assigned all.
Single frequency band can only be used by one user simultaneously.
Embodiment two:
As shown in Figure 3, during initial phase, if frequency spectrums of operation is divided into N number of sequential frequency band, respectively for M user, the discrete spectrum polymerization that the present embodiment is recorded specifically comprises following steps:
S101: by the perception to frequency spectrums of operation, obtains the using state of N number of sequential frequency band on frequency spectrum;
S102: according to frequency spectrum service condition, sets up frequency range and uses list { AV
imark frequency range whether can use, wherein i ∈ [1, N] is frequency range identifier number;
S103: to continuously can service band FS on frequency spectrum
k(k>=1) identifies, obtain frequency band length the longest can service band Max (FS
k);
S104: in the continuous situation of calculating frequency band, user sends the band number Demand that data need
j, wherein j ∈ [1, M] is Customs Assigned Number, obtains the user that required band number is maximum;
S105: can service band FS if all
kband number cannot meet the business demand of the maximum user of described required band number, then no longer bandwidth assignment is carried out to the customer service that this required band number is maximum, but select the larger user of next required band number to replace the maximum user of described required band number, forward step S106 to;
Otherwise: the maximum user priority of described required band number use described frequency band length the longest can service band Max (FS
k):
If what described frequency band length was the longest can service band Max (FS
k) band number be more than or equal to band number Max (Demand needed for the maximum user of described required band number
i), then use list { AV at frequency band
iin mark corresponding frequency band used by the user that described required band number is maximum, and recalculate the length of this frequency band;
If what described frequency band length was the longest can service band Max (FS
k) band number be less than band number Max (Demand needed for the maximum user of described required band number
i), then use list { AV at frequency band
iin mark corresponding frequency band used by the user that described required band number is maximum, the length of this frequency band is set to zero, and recalculates the remaining required band number of the maximum user of described required band number;
S106: the user of renewal sends the band number Demand of data needs
jwith continuously can service band FS on frequency spectrum
k, forward rapid S105 to, until required band number is 0 or allly can cannot meets the business demand of the minimum user of required band number by service band.
If can cannot meet the business demand of the minimum user of required band number by service band all, then represent and distribute unsuccessfully, current network cannot carry unallocated business; If required band number is 0, then represent that all bandwidth requirements are assigned all.
Embodiment three:
As shown in Figure 4, when there is new service needed use frequency spectrum in the system cloud gray model stage, the discrete spectrum polymerization that the present embodiment is recorded specifically comprises following steps:
S201: by the perception to frequency spectrums of operation, obtains frequency spectrum upstate;
S202: to continuously can service band FS on frequency spectrum
kidentify, obtain frequency band length the longest can service band Max (FS
k);
S203: calculate the band number Demand that user sends data needs
j;
S204: user use described frequency band length the longest can service band Max (FS
k):
If what described frequency band length was the longest can service band Max (FS
k) band number be more than or equal to the band number Demand that user sends data needs
j, then identify corresponding frequency band and used by user, and recalculate the length of this frequency band;
If what described frequency band length was the longest can service band Max (FS
k) band number be less than the band number Demand that user sends data needs
j, then identify corresponding frequency band and used by user, the length of this frequency band is set to zero, and recalculate the remaining required band number Demand of user
j;
S205: upgrade user and send band number Demand needed for business
j, forward step S204 to, be 0 until user sends band number needed for business or allly can cannot meet the business demand of user by service band.
If can cannot meet the business demand of user by service band all, then represent and distribute unsuccessfully, current network cannot carry unallocated business; If required band number is 0, then represent that all bandwidth requirements are assigned all.
The present invention owing to decreasing the protection interval expense between frequency range, thus improves system spectrum utilization ratio.
Above execution mode is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (5)
1., based on the discrete spectrum polymerization that maximum space is preferential, it is characterized in that, comprise the following steps:
S1: by the perception to frequency spectrums of operation, obtains frequency spectrum upstate;
S2: can identify by service band continuously on frequency spectrum, obtain frequency band length the longest can service band;
S3: calculate the band number that user sends data needs, obtain the user that required band number is maximum;
S4: the band number of service band can cannot meet the business demand of the maximum user of described required band number if all, then no longer bandwidth assignment is carried out to the customer service that this required band number is maximum, but select the larger user of next required band number to replace the maximum user of described required band number, forward step S5 to;
Otherwise: the maximum user priority of described required band number use described frequency band length the longest can service band:
If what described frequency band length was the longest the band number of service band can be more than or equal to the band number of the maximum user's needs of described required band number, then can corresponding frequency range be designated the longest for described frequency band length and used in service band, and recalculate this frequency band length the longest can the length of service band;
If what described frequency band length was the longest the band number of service band can be less than the band number of the maximum user's needs of described required band number, then can be designated the longest for described frequency band length and used by service band, by the longest for this frequency band length can the length zero setting of service band, recalculate the remaining required band number of the maximum user of described required band number;
S5: upgrade the maximum user of required band number and frequency band length the longest can service band, forward step S4 to, until required band number is 0 or allly can cannot meets the business demand of the minimum user of required band number by service band.
2. discrete spectrum polymerization as claimed in claim 1, is characterized in that, described frequency spectrum upstate comprise frequency band whether free time, idle probability, average free duration, user to target BS or the signal to noise ratio of gateway and the transmission rate of user's needs.
3. discrete spectrum polymerization as claimed in claim 1, is characterized in that, single frequency band can only be used by one user simultaneously.
4. discrete spectrum polymerization as claimed in claim 1, it is characterized in that, during initial phase, if frequency spectrums of operation is divided into N number of sequential frequency band, respectively for M user, described discrete spectrum polymerization specifically comprises following steps:
S101: by the perception to frequency spectrums of operation, obtains the using state of N number of sequential frequency band on frequency spectrum;
S102: according to frequency spectrum service condition, sets up frequency range and uses list { AV
imark frequency range whether can use, wherein i ∈ [1, N] is frequency range identifier number;
S103: to continuously can service band FS on frequency spectrum
k(k>=1) identifies, obtain frequency band length the longest can service band Max (FS
k);
S104: in the continuous situation of calculating frequency band, user sends the band number Demand that data need
j, wherein j ∈ [1, M] is Customs Assigned Number, obtains the user that required band number is maximum;
S105: can service band FS if all
kband number cannot meet the business demand of the maximum user of described required band number, then no longer bandwidth assignment is carried out to the customer service that this required band number is maximum, but select the larger user of next required band number to replace the maximum user of described required band number, forward step S106 to;
Otherwise: the maximum user priority of described required band number use described frequency band length the longest can service band Max (FS
k):
If what described frequency band length was the longest can service band Max (FS
k) band number be more than or equal to band number Max (Demand needed for the maximum user of described required band number
i), then use list { AV at frequency band
iin mark corresponding frequency band used by the user that described required band number is maximum, and recalculate this frequency band length the longest can the length of service band;
If what described frequency band length was the longest can service band Max (FS
k) band number be less than band number Max (Demand needed for the maximum user of described required band number
i), then use list { AV at frequency band
iin mark corresponding frequency band used by the user that described required band number is maximum, the length of service band can be set to zero by the longest for this frequency band length, and recalculate the remaining required band number of the maximum user of described required band number;
S106: upgrade the band number Demand that user sends data needs
jwith continuously can service band FS on frequency spectrum
k, forward step S105 to, until required band number is 0 or allly can cannot meets the business demand of the minimum user of required band number by service band.
5. discrete spectrum polymerization as claimed in claim 1, is characterized in that, when there is new service needed use frequency spectrum in the system cloud gray model stage, described discrete spectrum polymerization specifically comprises following steps:
S201: by the perception to frequency spectrums of operation, obtains frequency spectrum upstate;
S202: to continuously can service band FS on frequency spectrum
kidentify, obtain frequency band length the longest can service band Max (FS
k);
S203: calculate the band number Demand that user sends data needs
j;
S204: user use described frequency band length the longest can service band Max (FS
k):
If what described frequency band length was the longest can service band Max (FS
k) band number be more than or equal to the band number Demand that user sends data needs
j, then identify corresponding frequency band and used by user, and recalculate this frequency band length the longest can the length of service band;
If what described frequency band length was the longest can service band Max (FS
k) band number be less than the band number Demand that user sends data needs
j, then identify corresponding frequency band and used by user, the length of service band can be set to zero by the longest for this frequency band length, and recalculate the remaining required band number Demand of user
j;
S205: upgrade user and send band number Demand needed for business
j, forward step S204 to, be 0 until user sends band number needed for business or allly can cannot meet the business demand of user by service band.
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| CN102843229B (en) * | 2012-08-24 | 2015-01-14 | 北京邮电大学 | Frequency spectrum aggregation method based on business delay demands |
| CN104995847B (en) * | 2013-02-28 | 2018-03-27 | 西门子公司 | A kind of method and apparatus being used for via power line communication |
| CN109275190B (en) * | 2017-07-17 | 2021-10-26 | 华为技术有限公司 | Communication method and device |
| CN112367154A (en) * | 2020-12-07 | 2021-02-12 | 国网信息通信产业集团有限公司 | Resource mapping processing method and device based on electric power wireless private network |
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| 基于离散频带的中继协作网络频谱聚合算法研究;牛芳等;《北京联合大学学报（自然科学版）》;20110930;第25卷(第3期);第6-10页 * |
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