CN106685624B - A kind of band allocating method and device - Google Patents

A kind of band allocating method and device Download PDF

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Publication number
CN106685624B
CN106685624B CN201611116748.3A CN201611116748A CN106685624B CN 106685624 B CN106685624 B CN 106685624B CN 201611116748 A CN201611116748 A CN 201611116748A CN 106685624 B CN106685624 B CN 106685624B
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onu
network unit
frequency band
subcarrier
shared
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CN106685624A (en
Inventor
喻强
张�浩
李炳林
黄在朝
郭经红
吴军民
黄辉
虞跃
刘川
姚继明
卜宪德
吕立冬
孙晓艳
田文锋
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Global Energy Interconnection Research Institute
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Global Energy Interconnection Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0893—Assignment of logical groups to network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0896—Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Abstract

The present invention provides a kind of band allocating method and device, and by distributing the identical multiple network units of traffic data type to same carrier wave, the carrier wave includes multiple subcarriers；Determine that shared frequency band is less than or equal to the Second Type network unit of the frequency band threshold greater than the first kind network unit of frequency band threshold and shared frequency band respectively；The occupied subcarrier of Second Type network unit is adjusted, the Second Type network unit is made to share the subcarrier of the first kind network unit.The present invention can dynamically adjust each subcarrier distribution in real time; meets the needs of heterogeneous networks unit transmission band by distribution subcarrier and protection interval; band resource is utilized to greatest extent; in the case where not interfered to primary user; realize sharing frequency spectrum resource; to reduce protection interval on the basis of power communication multi-service is isolated and is transmitted, wavelength capacities are utilized to greatest extent, realize flexible and efficient access network.

Description

A kind of band allocating method and device
Technical field
The present invention relates to fields of communication technology, and in particular to a kind of band allocating method and device.
Background technique
As electric power terminal communication user sharply increases access bandwidth demand, it is whole how to further increase existing electric power The service efficiency that termination networks is of great significance.In access net, TDM-PON is this when on fixed wave length being user's distribution Between piece mechanism, not only strongly limit the available bandwidth of each user, waste the personal bandwidth of optical fiber itself.
Currently, generally use protection interval in the consolidated network of carrying multiple communication services to carry out data stream separation, Most of dynamic Adjusted Option is in accordance with different business and is allocated, and cannot make full use of upstream band resource.Due to In bearing multiple service in consolidated network, there are the isolation between multiple business, i.e., to a variety of communication industries under PON Technical Architecture Business carries out isolation transmission, reduces the service efficiency of limited band resource.
Summary of the invention
The technical problem to be solved in the present invention is that the frequency band of the multiple business isolation transmission of existing access net is overcome to use The lower defect of efficiency.
The present invention provides a kind of band allocating method, comprising:
The identical multiple network units of traffic data type are distributed to same carrier wave, the carrier wave includes multiple sub- loads Wave；
Determine that shared frequency band is greater than the first kind network unit of frequency band threshold and shared frequency band is less than or equal to institute respectively State the Second Type network unit of frequency band threshold；
The occupied subcarrier of Second Type network unit is adjusted, shares the Second Type network unit described The subcarrier of first kind network unit.
Preferably, the frequency band threshold is (Ra× T)/n, wherein n > 1, RaFor the transmission rate of the subcarrier, T is institute State the whole cycle of subcarrier, (Ra× T) indicate the frequency band of the subcarrier.
Preferably, the n value in the frequency band threshold is 2.
Preferably, the adjustment occupied subcarrier of Second Type network unit, makes the Second Type network The subcarrier of first kind network unit described in units shared, comprising:
ONU in the first kind network unit is determined respectivelyiQuantity I and the Second Type network unit in ONUjQuantity J；
When I is greater than or equal to J, the ONU in the first kind network unit is judgediWith the Second Type network list ONU in memberjWhether the sum of shared frequency band is more than the ONU in the first kind network unitiShared sub-carrier band；
ONU in the first kind network unitiWith the ONU in the Second Type network unitjShared frequency band it With the ONU being less than in the first kind network unitiWhen shared sub-carrier band, the Second Type network unit is adjusted In ONUjOccupied subcarrier makes the ONU in the Second Type network unitjShare the first kind network unit In ONUiSubcarrier.
Preferably, when I is less than J, judge the ONU in the first kind network unitiWith the Second Type network ONU in unitjWhether the sum of shared frequency band is more than the ONU in the first kind network unitiShared sub-carrier band；
ONU in the first kind network unitiWith the ONU in the Second Type network unitjShared frequency band it With the ONU being less than in the first kind network unitiWhen shared sub-carrier band, the Second Type network unit is adjusted In ONUjOccupied subcarrier makes the ONU in the Second Type network unitjShare the first kind network unit In ONUiSubcarrier；
By the ONU for not being adjusted subcarrier in the Second Type network unitjIt is determined as ONUk, and form third class Type network unit；
Judge the sum of frequency band shared by m ONU in the third Type Network Element whether more than ONUkShared subcarrier Frequency band；
The sum of frequency band shared by the m ONU is less than ONUkWhen shared sub-carrier band, adjust shared by the m ONU Subcarrier makes the m ONU share ONUkSubcarrier.
Preferably, after the composition third Type Network Element, further includes:
Frequency band shared by ONU in the third Type Network Element is arranged in descending order.
The present invention also provides a kind of band allocation means, comprising:
Allocation unit, for distributing the identical multiple network units of traffic data type to same carrier wave, the load Wave includes multiple subcarriers；
Determination unit, for determining shared first kind network unit of the frequency band greater than frequency band threshold and shared frequency band respectively Less than or equal to the Second Type network unit of the frequency band threshold；
Adjustment unit makes the Second Type net for adjusting the occupied subcarrier of Second Type network unit The subcarrier of first kind network unit described in network units shared.
Preferably, the frequency band threshold is (Ra× T)/n, wherein n > 1, RaFor the transmission rate of the subcarrier, T is institute State the whole cycle of subcarrier, (Ra× T) indicate the frequency band of the subcarrier.
Preferably, the n value in the frequency band threshold is 2.
Preferably, the adjustment unit includes:
Quantity determines subelement, for determining ONU in the first kind network unit respectivelyiQuantity I and described ONU in Second Type network unitjQuantity J；
Frequency band judgment sub-unit, for judging the ONU in the first kind network unit when I is greater than or equal to Ji With the ONU in the Second Type network unitjWhether the sum of shared frequency band is more than the ONU in the first kind network uniti Shared sub-carrier band；
Subcarrier adjusts subelement, for as the ONU in the first kind network unitiWith the Second Type network ONU in unitjThe sum of shared frequency band is less than the ONU in the first kind network unitiWhen shared sub-carrier band, adjust ONU in the whole Second Type network unitjOccupied subcarrier makes the ONU in the Second Type network unitjAltogether With the ONU in the first kind network unitiSubcarrier.
Preferably, frequency band judgment sub-unit, for judging the ONU in the first kind network unit when I is less than Ji With the ONU in the Second Type network unitjWhether the sum of shared frequency band is more than the ONU in the first kind network uniti Shared sub-carrier band；
Subcarrier adjusts subelement, for as the ONU in the first kind network unitiWith the Second Type network ONU in unitjThe sum of shared frequency band is less than the ONU in the first kind network unitiWhen shared sub-carrier band, adjust ONU in the whole Second Type network unitjOccupied subcarrier makes the ONU in the Second Type network unitjAltogether With the ONU in the first kind network unitiSubcarrier；
Subelement is determined, for by the ONU for not being adjusted subcarrier in the Second Type network unitjIt is determined as ONUk, and form third Type Network Element；
Judgment sub-unit, for judge the sum of frequency band shared by m ONU in the third Type Network Element whether be more than ONUkShared sub-carrier band；
Subelement is adjusted, is less than ONU for working as the sum of frequency band shared by the m ONUkWhen shared sub-carrier band, adjust The whole occupied subcarrier of m ONU, makes the m ONU share ONUkSubcarrier.
Preferably, further includes:
Subelement is arranged, for arranging frequency band shared by the ONU in the third Type Network Element in descending order.
Technical solution of the present invention has the advantages that
The present invention provides a kind of band allocating method and device, by by the identical multiple network units of traffic data type In distribution to same carrier wave, the carrier wave includes multiple subcarriers；Determine that shared frequency band is greater than the first kind of frequency band threshold respectively Type network unit and shared frequency band are less than or equal to the Second Type network unit of the frequency band threshold；Adjust the Second Type The occupied subcarrier of network unit, the son for making the Second Type network unit share the first kind network unit carry Wave.The present invention can dynamically adjust each subcarrier distribution in real time, meet difference by distribution subcarrier and protection interval The demand of network unit transmission band utilizes band resource to greatest extent, real in the case where not interfering to primary user Existing sharing frequency spectrum resource, so that protection interval is reduced on the basis of power communication multi-service is isolated and is transmitted, it is sharp to greatest extent With wavelength capacities, flexible and efficient access network is realized.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow chart of band allocating method；
Fig. 2 is the flow chart that subcarrier is adjusted in a kind of band allocating method；
Fig. 3 is a kind of schematic diagram of band allocation means.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can be with It is the connection inside two elements, can be wireless connection, be also possible to wired connection.For those of ordinary skill in the art For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments It can be combined with each other at conflict.
Embodiment 1
The present embodiment provides a kind of band allocating methods.
Firstly, carrying out the division of frequency spectrum according to network unit.For example, network unit can be ONU (Optical Network Unit, optical network unit).Different subcarriers is distributed to multiple ONU respectively, which can be specific sub- load Wave, for controlling the transmission of information.For the subcarrier of remainder data, OFDMA (Orthogonal Frequency can be used Division Multiple Access, orthogonal frequency division multiple access) mode distribute to other different ONU.
The flow chart of this method is as shown in Figure 1.Include the following steps:
S1: the identical multiple network units of traffic data type are distributed to same carrier wave, the carrier wave includes multiple Subcarrier.
Specifically, can by the optical switching matrix at center by the identical multiple network units of traffic data type, such as Multiple ONU are distributed to same carrier wave.By the optical switching matrix at center, according to multiple ONU transmit data frequency and OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing), by traffic data type Identical multiple ONU are distributed to same carrier wave, and the carrier wave includes multiple subcarriers.
When swapping distribution by the optical switching matrix at center, also interacted with source flux and convergence flow, In It is transmitted between each router.Meanwhile OFDM multiplexing is waited in the data flow of output buffer.
Using ROADM, (Reconfigurable Optical Add-Drop Multiplexer, reconfigurable optical point are inserted multiple With device) in internal aggregated channel or single channel power monitoring is carried out, and as road on bar path/lower road partial information stream. By limited up/down road port, partial data stream can be added from network in time or deletes the extra data flow in part, Guarantee the utilization rate of wavelength to the greatest extent.
S2: determine that shared frequency band is greater than the first kind network unit of frequency band threshold and shared frequency band is less than or equal to respectively The Second Type network unit of the frequency band threshold.
As a specific embodiment, the frequency band threshold is (Ra× T)/n, wherein n > 1, RaFor the subcarrier Transmission rate, T be the subcarrier whole cycle, (Ra× T) indicate the frequency band of the subcarrier.
Preferably, the n value in the frequency band threshold is 2.
Specifically, determining that shared frequency band is greater than frequency band threshold respectively is (Ra× T)/n first kind network unit ONUiWith It is (R that shared frequency band, which is less than or equal to the frequency band threshold,a× T)/n Second Type network unit ONUj, wherein n > 1, RaFor The transmission rate of the subcarrier, T are the whole cycle of the subcarrier, (Ra× T) indicate the frequency band of the subcarrier.
Firstly, obtaining frequency band B shared by each ONU in the multiple ONU respectively；By frequency band B shared by each ONU and the frequency Band threshold value is compared, i.e., by B and (Ra× T)/n is compared.It is carried according to whether frequency band B shared by each ONU is greater than 1/n son Wave frequency band, it is two types that the multiple network unit, that is, multiple ONU, which are divided to, and first kind network unit is that shared frequency band is greater than The ONU of 1/n sub-carrier bandi, Second Type network unit is that shared frequency band is less than or equal to 1/n sub-carrier band ONUj。
Preferably, when n value is 2, first kind network unit is that shared frequency band is greater than 1/2 sub-carrier band ONUi, Second Type network unit is the ONU that shared frequency band is less than or equal to 1/2 sub-carrier bandj。
S3: adjusting the occupied subcarrier of Second Type network unit, shares the Second Type network unit The subcarrier of the first kind network unit.
Specifically, the Second Type network unit ONU is adjustedjOccupied subcarrier makes the Second Type network Unit ONUjShare the first kind network unit ONUiSubcarrier.
By the ONU in first kind network unitiWith the ONU in Second Type network unitjComplementary according to shared frequency band Principle is matched, i.e., according to the ONU in first kind network unitiWith the ONU in Second Type network unitjShared frequency band The sum of be less than ONU in the first kind network unitiThe principle of shared sub-carrier band is matched, so as to adjust institute State the ONU in Second Type network unitjOccupied subcarrier makes the ONU in the Second Type network unitjShare institute State the ONU in first kind network unitiSubcarrier.
Band allocating method provided by the invention, by distributing the identical multiple network units of traffic data type to same In one carrier wave, the carrier wave includes multiple subcarriers；Determine that shared frequency band is greater than the first kind network list of frequency band threshold respectively First and shared frequency band is less than or equal to the Second Type network unit of the frequency band threshold；Adjust the Second Type network unit Occupied subcarrier makes the Second Type network unit share the subcarrier of the first kind network unit.The present invention Each subcarrier distribution can be dynamically adjusted in real time, and heterogeneous networks unit is met by distribution subcarrier and protection interval and is passed The demand of defeated frequency band utilizes band resource to greatest extent, in the case where not interfering to primary user, realizes frequency spectrum resource It is shared, to reduce protection interval on the basis of power communication multi-service is isolated and is transmitted, wavelength capacities are utilized to greatest extent, Realize flexible and efficient access network.
Matrix H is introduced, such as formula as a specific embodiment for the bandwidth assignment situation for recording every subcarriers (1) shown in:
The frequency band of subcarrier shared by each ONU will be indicated clearly in formula (1), to obtain frequency band B shared by each ONU.
The transmission rate of each subcarrier is RaBit/s, the whole cycle of subcarrier are T, can be with using complementation algorithm The number N of subcarrier shared by each ONU is obtained, as shown in formula (2):
N=[B-B% (Ra×T)]/(Ra×T) (2)
In formula (2), % indicates complementation.
The process of above-mentioned steps S3 is as shown in Figure 2:
Firstly, determining ONU in the first kind network unit respectivelyiQuantity I and the Second Type network list ONU in memberjQuantity J；
I is compared with J, that is, judges ONU in the first kind network unitiQuantity I whether be less than described ONU in two Type Network ElementsjQuantity J.
Specifically, two following situations can be divided.
First, when I is more than or equal to J:
Judge the ONU in the first kind network unitiWith the ONU in the Second Type network unitjShared frequency band The sum of whether be more than the first kind network unit in ONUiShared sub-carrier band；
According to band occupancy principle of complementarity, i.e. ONU in first kind network unitiIn Second Type network unit ONUjThe sum of shared frequency band is less than the ONU in the first kind network unitiThe principle of shared sub-carrier band, such as formula (3) It is shown:
Bi+Bj+Tg×Ra≤Ni×(Ra×T) (3)
In formula (3), BiFor the ONU in first kind network unitiShared frequency band, BjFor in Second Type network unit ONUjShared frequency band, TgFor the protection interval between different ONU, i.e. ONUiAnd ONUjBetween protection interval；NiFor ONUiIt is shared The number of subcarrier.Formula (3) indicate band occupancy principle of complementarity refer to, ONUiShared frequency band, ONUjShared frequency band and ONUi And ONUjBetween protection interval shared by the sum of frequency band be less than or equal to ONUiShared NiThe sum of the frequency band of a subcarrier.
ONU in the first kind network unitiWith the ONU in the Second Type network unitjShared frequency band it With the ONU being less than in the first kind network unitiWhen shared sub-carrier band, the Second Type network unit is adjusted In ONUjOccupied subcarrier makes the ONU in the Second Type network unitjShare the first kind network unit In ONUiSubcarrier.
To each ONU in first kind network uniti, can be matched in Second Type network unit according to formula (3) Band occupancy meets the ONU of formula (3)j, and with corresponding ONU in first kind network unitiPairing, by ONUiShared NiIt is a Subcarrier distributes to this to ONU, i.e. ONUiAnd ONUj, and in ONUiAnd ONUjBetween be arranged protection interval (Tg×Ra)。
Second, when I is less than J:
Judge the ONU in the first kind network unitiWith the ONU in the Second Type network unitjShared frequency band The sum of whether be more than the first kind network unit in ONUiShared sub-carrier band；
According to band occupancy principle of complementarity, i.e. ONU in first kind network unitiIn Second Type network unit ONUjThe sum of shared frequency band is less than the ONU in the first kind network unitiThe principle of shared sub-carrier band, such as formula (3) It is shown:
Bi+Bj+Tg×Ra≤Ni×(Ra×T) (3)
In formula (3), BiFor the ONU in first kind network unitiShared frequency band, BjFor in Second Type network unit ONUjShared frequency band, TgFor the protection interval between different ONU, i.e. ONUiAnd ONUjBetween protection interval；NiFor ONUiIt is shared The number of subcarrier.Formula (3) indicate band occupancy principle of complementarity refer to, ONUiShared frequency band, ONUjShared frequency band and ONUi And ONUjBetween protection interval shared by the sum of frequency band be less than or equal to ONUiShared NiThe sum of the frequency band of a subcarrier.
ONU in the first kind network unitiWith the ONU in the Second Type network unitjShared frequency band it With the ONU being less than in the first kind network unitiWhen shared sub-carrier band, the Second Type network unit is adjusted In ONUjOccupied subcarrier makes the ONU in the Second Type network unitjShare the first kind network unit In ONUiSubcarrier.
To each ONU in first kind network uniti, can be matched in Second Type network unit according to formula (3) Band occupancy meets the ONU of formula (3)j, and with corresponding ONU in first kind network unitiPairing, by ONUiShared NiIt is a Subcarrier distributes to this to ONU, i.e. ONUiAnd ONUj, and in ONUiAnd ONUjBetween be arranged protection interval (Tg×Ra)。
By the ONU for not being adjusted subcarrier in the Second Type network unitjIt is determined as ONUk, and form third class Type network unit.With unpaired ONU in third Type Network Element record Second Type network unitj.Preferably, it can incite somebody to action Frequency band B shared by ONU in third Type Network ElementkIt arranges in descending order.
Judge the sum of frequency band shared by m ONU in third Type Network Element whether more than ONUkShared sub-carrier band.
Specifically, judge first ONU in third Type Network Element1Shared frequency band B1ONU adjacent thereto2It is shared Frequency band B2Whether formula (4) are met:
B1+B2+Tg×Ra≤N1×(Ra×T) (4)
In formula (4), N1For ONU1The number of shared subcarrier.
If meeting formula (4), addition and ONU2Adjacent ONU3Shared frequency band B3, judge again, until meeting formula (5):
Bk+Bk+1+…+Bk+m+(m-1)×Tg×Ra≤Nk×(Ra×T) (5)
In formula (5), NkFor ONUkThe number of shared subcarrier.
The sum of frequency band shared by the m ONU is less than ONUkWhen shared sub-carrier band, adjust shared by the m ONU Subcarrier makes the m ONU share ONUkSubcarrier.
When meeting formula (5), i.e., the sum of frequency band shared by the m ONU is less than ONUkWhen shared sub-carrier band, adjust The whole occupied subcarrier of m ONU, makes the m ONU share ONUkSubcarrier, and (m-1) a protection interval is set (Tg×Ra)。
According to ONU in the first kind network unitiQuantity I and the Second Type network unit in ONUj's Quantity J, is divided into two kinds of situation processing, adjusts subcarrier distribution according to band occupancy principle of complementarity, reduces traditional polled and consumed Time, and dispose protection interval to reach multi-service isolation transmission.
Embodiment 2
The present embodiment provides a kind of band allocation means, the schematic diagram of the device as shown in figure 3, include allocation unit 10, Determination unit 20 and adjustment unit 30.
Firstly, carrying out the division of frequency spectrum according to network unit.For example, network unit can be ONU (Optical Network Unit, optical network unit).Different subcarriers is distributed to multiple ONU respectively, which can be specific sub- load Wave, for controlling the transmission of information.For the subcarrier of remainder data, OFDMA (Orthogonal Frequency can be used Division Multiple Access, orthogonal frequency division multiple access) mode distribute to other different ONU.
Allocation unit 10, it is described for distributing the identical multiple network units of traffic data type to same carrier wave Carrier wave includes multiple subcarriers.
Specifically, can by the optical switching matrix at center by the identical multiple network units of traffic data type, such as Multiple ONU are distributed to same carrier wave.By the optical switching matrix at center, according to multiple ONU transmit data frequency and OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing), by traffic data type Identical multiple ONU are distributed to same carrier wave, and the carrier wave includes multiple subcarriers.
When swapping distribution by the optical switching matrix at center, also interacted with source flux and convergence flow, In It is transmitted between each router.Meanwhile OFDM multiplexing is waited in the data flow of output buffer.
Using ROADM, (Reconfigurable Optical Add-Drop Multiplexer, reconfigurable optical point are inserted multiple With device) in internal aggregated channel or single channel power monitoring is carried out, and as road on bar path/lower road partial information stream. By limited up/down road port, partial data stream can be added from network in time or deletes the extra data flow in part, Guarantee the utilization rate of wavelength to the greatest extent.
Determination unit 20, for determining shared first kind network unit of the frequency band greater than frequency band threshold and shared frequency respectively Band is less than or equal to the Second Type network unit of the frequency band threshold.
As a specific embodiment, the frequency band threshold is (Ra× T)/n, wherein n > 1, RaFor the subcarrier Transmission rate, T be the subcarrier whole cycle, (Ra× T) indicate the frequency band of the subcarrier.
Preferably, the n value in the frequency band threshold is 2.
Specifically, determining that shared frequency band is greater than frequency band threshold respectively is (Ra× T)/n first kind network unit ONUiWith It is (R that shared frequency band, which is less than or equal to the frequency band threshold,a× T)/n Second Type network unit ONUj, wherein n > 1, RaFor The transmission rate of the subcarrier, T are the whole cycle of the subcarrier, (Ra× T) indicate the frequency band of the subcarrier.
Firstly, obtaining frequency band B shared by each ONU in the multiple ONU respectively；By frequency band B shared by each ONU and the frequency Band threshold value is compared, i.e., by B and (Ra× T)/n is compared.It is carried according to whether frequency band B shared by each ONU is greater than 1/n son Wave frequency band, it is two types that the multiple network unit, that is, multiple ONU, which are divided to, and first kind network unit is that shared frequency band is greater than The ONU of 1/n sub-carrier bandi, Second Type network unit is that shared frequency band is less than or equal to 1/n sub-carrier band ONUj。
Preferably, when n value is 2, first kind network unit is that shared frequency band is greater than 1/2 sub-carrier band ONUi, Second Type network unit is the ONU that shared frequency band is less than or equal to 1/2 sub-carrier bandj。
Adjustment unit 30 makes the Second Type for adjusting the occupied subcarrier of Second Type network unit Network unit shares the subcarrier of the first kind network unit.
Specifically, the Second Type network unit ONU is adjustedjOccupied subcarrier makes the Second Type network Unit ONUjShare the first kind network unit ONUiSubcarrier.
By the ONU in first kind network unitiWith the ONU in Second Type network unitjComplementary according to shared frequency band Principle is matched, i.e., according to the ONU in first kind network unitiWith the ONU in Second Type network unitjShared frequency band The sum of be less than ONU in the first kind network unitiThe principle of shared sub-carrier band is matched, so as to adjust institute State the ONU in Second Type network unitjOccupied subcarrier makes the ONU in the Second Type network unitjShare institute State the ONU in first kind network unitiSubcarrier.
Band allocation means provided by the invention, by distributing the identical multiple network units of traffic data type to same In one carrier wave, the carrier wave includes multiple subcarriers；Determine that shared frequency band is greater than the first kind network list of frequency band threshold respectively First and shared frequency band is less than or equal to the Second Type network unit of the frequency band threshold；Adjust the Second Type network unit Occupied subcarrier makes the Second Type network unit share the subcarrier of the first kind network unit.The present invention Each subcarrier distribution can be dynamically adjusted in real time, and heterogeneous networks unit is met by distribution subcarrier and protection interval and is passed The demand of defeated frequency band utilizes band resource to greatest extent, in the case where not interfering to primary user, realizes frequency spectrum resource It is shared, to reduce protection interval on the basis of power communication multi-service is isolated and is transmitted, wavelength capacities are utilized to greatest extent, Realize flexible and efficient access network.
Matrix H is introduced, such as formula as a specific embodiment for the bandwidth assignment situation for recording every subcarriers (1) shown in:
The frequency band of subcarrier shared by each ONU will be indicated clearly in formula (1), to obtain frequency band B shared by each ONU.
The transmission rate of each subcarrier is RaBit/s, the whole cycle of subcarrier are T, can be with using complementation algorithm The number N of subcarrier shared by each ONU is obtained, as shown in formula (2):
N=[B-B% (Ra×T)]/(Ra×T) (2)
In formula (2), % indicates complementation.
Adjustment unit 30 includes that quantity determines subelement, frequency band judgment sub-unit, subcarrier adjustment subelement, determines that son is single Member, judgment sub-unit, adjustment subelement.
Quantity determines subelement, for determining ONU in the first kind network unit respectivelyiQuantity I and described ONU in Second Type network unitjQuantity J；
I is compared with J, that is, judges ONU in the first kind network unitiQuantity I whether be less than described ONU in two Type Network ElementsjQuantity J.
Specifically, two following situations can be divided.
First, when I is more than or equal to J:
Frequency band judgment sub-unit, for judging the ONU in the first kind network unitiWith the Second Type network ONU in unitjWhether the sum of shared frequency band is more than the ONU in the first kind network unitiShared sub-carrier band.
According to band occupancy principle of complementarity, i.e. ONU in first kind network unitiIn Second Type network unit ONUjThe sum of shared frequency band is less than the ONU in the first kind network unitiThe principle of shared sub-carrier band, such as formula (3) It is shown:
Bi+Bj+Tg×Ra≤Ni×(Ra×T) (3)
In formula (3), BiFor the ONU in first kind network unitiShared frequency band, BjFor in Second Type network unit ONUjShared frequency band, TgFor the protection interval between different ONU, i.e. ONUiAnd ONUjBetween protection interval；NiFor ONUiIt is shared The number of subcarrier.Formula (3) indicate band occupancy principle of complementarity refer to, ONUiShared frequency band, ONUjShared frequency band and ONUi And ONUjBetween protection interval shared by the sum of frequency band be less than or equal to ONUiShared NiThe sum of the frequency band of a subcarrier.
Subcarrier adjusts subelement, for as the ONU in the first kind network unitiWith the Second Type network ONU in unitjThe sum of shared frequency band is less than the ONU in the first kind network unitiWhen shared sub-carrier band, adjust ONU in the whole Second Type network unitjOccupied subcarrier makes the ONU in the Second Type network unitjAltogether With the ONU in the first kind network unitiSubcarrier.
To each ONU in first kind network uniti, can be matched in Second Type network unit according to formula (3) Band occupancy meets the ONU of formula (3)j, and with corresponding ONU in first kind network unitiPairing, by ONUiShared NiIt is a Subcarrier distributes to this to ONU, i.e. ONUiAnd ONUj, and in ONUiAnd ONUjBetween be arranged protection interval (Tg×Ra)。
Second, when I is less than J:
Frequency band judgment sub-unit, for judging the ONU in the first kind network unitiWith the Second Type network ONU in unitjWhether the sum of shared frequency band is more than the ONU in the first kind network unitiShared sub-carrier band.
According to band occupancy principle of complementarity, i.e. ONU in first kind network unitiIn Second Type network unit ONUjThe sum of shared frequency band is less than the ONU in the first kind network unitiThe principle of shared sub-carrier band, such as formula (3) It is shown:
Bi+Bj+Tg×Ra≤Ni×(Ra×T) (3)
In formula (3), BiFor the ONU in first kind network unitiShared frequency band, BjFor in Second Type network unit ONUjShared frequency band, TgFor the protection interval between different ONU, i.e. ONUiAnd ONUjBetween protection interval；NiFor ONUiIt is shared The number of subcarrier.Formula (3) indicate band occupancy principle of complementarity refer to, ONUiShared frequency band, ONUjShared frequency band and ONUi And ONUjBetween protection interval shared by the sum of frequency band be less than or equal to ONUiShared NiThe sum of the frequency band of a subcarrier.
Subcarrier adjusts subelement, for as the ONU in the first kind network unitiWith the Second Type network ONU in unitjThe sum of shared frequency band is less than the ONU in the first kind network unitiWhen shared sub-carrier band, adjust ONU in the whole Second Type network unitjOccupied subcarrier makes the ONU in the Second Type network unitjAltogether With the ONU in the first kind network unitiSubcarrier.
To each ONU in first kind network uniti, can be matched in Second Type network unit according to formula (3) Band occupancy meets the ONU of formula (3)j, and with corresponding ONU in first kind network unitiPairing, by ONUiShared NiIt is a Subcarrier distributes to this to ONU, i.e. ONUiAnd ONUj, and in ONUiAnd ONUjBetween be arranged protection interval (Tg×Ra)。
Subelement is determined, for by the ONU for not being adjusted subcarrier in the Second Type network unitjIt is determined as ONUk, and form third Type Network Element.It is recorded with third Type Network Element unpaired in Second Type network unit ONUj。
It preferably, further include arrangement subelement, for by frequency band B shared by the ONU in third Type Network ElementkIn descending order Arrangement.
Judgment sub-unit, for judging the sum of frequency band shared by m ONU in third Type Network Element whether more than ONUk Shared sub-carrier band.
Specifically, judge first ONU in third Type Network Element1Shared frequency band B1ONU adjacent thereto2It is shared Frequency band B2Whether formula (4) are met:
B1+B2+Tg×Ra≤N1×(Ra×T) (4)
In formula (4), N1For ONU1The number of shared subcarrier.
If meeting formula (4), addition and ONU2Adjacent ONU3Shared frequency band B3, judge again, until meeting formula (5):
Bk+Bk+1+…+Bk+m+(m-1)×Tg×Ra≤Nk×(Ra×T) (5)
In formula (5), NkFor ONUkThe number of shared subcarrier.
Subelement is adjusted, is less than ONU for working as the sum of frequency band shared by the m ONUkWhen shared sub-carrier band, adjust The whole occupied subcarrier of m ONU, makes the m ONU share ONUkSubcarrier.
When meeting formula (5), i.e., the sum of frequency band shared by the m ONU is less than ONUkWhen shared sub-carrier band, adjust The whole occupied subcarrier of m ONU, makes the m ONU share ONUkSubcarrier, and (m-1) a protection interval is set (Tg×Ra)。
According to ONU in the first kind network unitiQuantity I and the Second Type network unit in ONUj's Quantity J, is divided into two kinds of situation processing, adjusts subcarrier distribution according to band occupancy principle of complementarity, reduces traditional polled and consumed Time, and dispose protection interval to reach multi-service isolation transmission.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or It changes still within the protection scope of the invention.

Claims (10)

1. a kind of band allocating method characterized by comprising
The identical multiple network units of traffic data type are distributed to same carrier wave, the carrier wave includes multiple subcarriers；
Determine that shared frequency band is greater than the first kind network unit of frequency band threshold and shared frequency band is less than or equal to the frequency respectively Second Type network unit with threshold value；
The occupied subcarrier of Second Type network unit is adjusted, the Second Type network unit is made to share described first The subcarrier of Type Network Element；
Wherein, the adjustment occupied subcarrier of Second Type network unit, keeps the Second Type network unit total With the subcarrier of the first kind network unit, comprising:
ONU in the first kind network unit is determined respectivelyiQuantity I and the Second Type network unit in ONUj's Quantity J；
When I is greater than or equal to J, the ONU in the first kind network unit is judgediIn the Second Type network unit ONUjWhether the sum of shared frequency band is more than the ONU in the first kind network unitiShared sub-carrier band；
ONU in the first kind network unitiWith the ONU in the Second Type network unitjThe sum of shared frequency band is not More than the ONU in the first kind network unitiWhen shared sub-carrier band, adjust in the Second Type network unit ONUjOccupied subcarrier makes the ONU in the Second Type network unitjIt shares in the first kind network unit ONUiSubcarrier.
2. the method according to claim 1, wherein the frequency band threshold is (Ra× T)/n, wherein n > 1, RaFor The transmission rate of the subcarrier, T are the whole cycle of the subcarrier, (Ra× T) indicate the frequency band of the subcarrier.
3. according to the method described in claim 2, it is characterized in that, the n value in the frequency band threshold is 2.
4. according to the method described in claim 1, it is characterized by:
When I is less than J, the ONU in the first kind network unit is judgediWith the ONU in the Second Type network unitj Whether the sum of shared frequency band is more than the ONU in the first kind network unitiShared sub-carrier band；
ONU in the first kind network unitiWith the ONU in the Second Type network unitjThe sum of shared frequency band is not More than the ONU in the first kind network unitiWhen shared sub-carrier band, adjust in the Second Type network unit ONUjOccupied subcarrier makes the ONU in the Second Type network unitjIt shares in the first kind network unit ONUiSubcarrier；
By the ONU for not being adjusted subcarrier in the Second Type network unitjIt is determined as ONUk, and form third type net Network unit；
Judge the sum of frequency band shared by m ONU in the third Type Network Element whether more than ONUkShared sub-carrier band；
The sum of frequency band shared by the m ONU is less than ONUkWhen shared sub-carrier band, it is occupied to adjust the m ONU Subcarrier makes the m ONU share ONUkSubcarrier.
5. according to the method described in claim 4, it is characterized in that, also being wrapped after the composition third Type Network Element It includes:
Frequency band shared by ONU in the third Type Network Element is arranged in descending order.
6. a kind of band allocation means characterized by comprising
Allocation unit, for distributing the identical multiple network units of traffic data type to same carrier wave, the carrier wave packet Include multiple subcarriers；
Determination unit, for determining that shared frequency band is greater than the first kind network unit of frequency band threshold and shared frequency band is less than respectively Or the Second Type network unit equal to the frequency band threshold；
Adjustment unit makes the Second Type network list for adjusting the occupied subcarrier of Second Type network unit Member shares the subcarrier of the first kind network unit；
The adjustment unit includes:
Quantity determines subelement, for determining ONU in the first kind network unit respectivelyiQuantity I and second class ONU in type network unitjQuantity J；
Frequency band judgment sub-unit, for judging the ONU in the first kind network unit when I is greater than or equal to JiWith it is described ONU in Second Type network unitjWhether the sum of shared frequency band is more than the ONU in the first kind network unitiShared son Carrier frequency band；
Subcarrier adjusts subelement, for as the ONU in the first kind network unitiWith the Second Type network unit In ONUjThe sum of shared frequency band is less than the ONU in the first kind network unitiWhen shared sub-carrier band, institute is adjusted State the ONU in Second Type network unitjOccupied subcarrier makes the ONU in the Second Type network unitjShare institute State the ONU in first kind network unitiSubcarrier.
7. device according to claim 6, which is characterized in that the frequency band threshold is (Ra× T)/n, wherein n > 1, RaFor The transmission rate of the subcarrier, T are the whole cycle of the subcarrier, (Ra× T) indicate the frequency band of the subcarrier.
8. device according to claim 7, which is characterized in that the n value in the frequency band threshold is 2.
9. device according to claim 6, it is characterised in that:
Frequency band judgment sub-unit, for judging the ONU in the first kind network unit when I is less than JiWith second class ONU in type network unitjWhether the sum of shared frequency band is more than the ONU in the first kind network unitiShared subcarrier frequency Band；
Subcarrier adjusts subelement, for as the ONU in the first kind network unitiWith the Second Type network unit In ONUjThe sum of shared frequency band is less than the ONU in the first kind network unitiWhen shared sub-carrier band, institute is adjusted State the ONU in Second Type network unitjOccupied subcarrier makes the ONU in the Second Type network unitjShare institute State the ONU in first kind network unitiSubcarrier；
Subelement is determined, for by the ONU for not being adjusted subcarrier in the Second Type network unitjIt is determined as ONUk, and Form third Type Network Element；
Judgment sub-unit, for judging the sum of frequency band shared by m ONU in the third Type Network Element whether more than ONUk Shared sub-carrier band；
Subelement is adjusted, is less than ONU for working as the sum of frequency band shared by the m ONUkWhen shared sub-carrier band, described in adjustment The occupied subcarrier of m ONU makes the m ONU share ONUkSubcarrier.
10. device according to claim 9, which is characterized in that further include:
Subelement is arranged, for arranging frequency band shared by the ONU in the third Type Network Element in descending order.
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