CN105517166A - Communication frequency selection method and device - Google Patents

Communication frequency selection method and device Download PDF

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Publication number
CN105517166A
CN105517166A CN201510836675.4A CN201510836675A CN105517166A CN 105517166 A CN105517166 A CN 105517166A CN 201510836675 A CN201510836675 A CN 201510836675A CN 105517166 A CN105517166 A CN 105517166A
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China
Prior art keywords
frequency range
uplink
downlink
band
interference value
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CN201510836675.4A
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CN105517166B (en
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云翔
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Baicells Technologies Co Ltd
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Baicells Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • 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
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10—Dynamic resource partitioning

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a communication frequency selection method and device. The method comprises the following steps: performing interference detection on a plurality of frequency bands predefined on an unlicensed frequency band to obtain a plurality of current interference values corresponding to the plurality of frequency bands one by one; and selecting an uplink frequency band and a downlink frequency band for performing communications in a frequency division duplexing way from the plurality of frequency bands according the plurality of current interference values. Through adoption of the communication frequency selection method and device, the technical problem of low data transmission rate of a time division duplexing system in the unlicensed frequency band is solved.

Description

Communication frequency system of selection and device
Technical field
The present invention relates to the communications field, in particular to a kind of communication frequency system of selection and device.
Background technology
Existing radio communication comprises is authorizing in (licensed) frequency range and the radio communication of carrying out in unauthorized (Unlicensed) frequency range, the radio communication that licensed frequency range is carried out refers to that operator passes through to dispose wireless access network equipment (as base station), with equipment of the core network (as attaching position register (HomeLocationRegister, referred to as HLR)) etc., for subscriber equipment (as mobile phone) provides the system of communication service.The communication that such as present mobile communication carrier (as China Mobile) provides, frequency range shared by this kind of radio communication is used alone by this mobile communication carrier (hereinafter referred to as operator), and operator carries out managing and optimizing (density, transmitted power, antenna tilt etc. that such as control to be operated in the access device of this frequency range) for this resource of frequency range, thus ensure reliability and the validity of the radio communication service provided in this frequency range.
Current mobile communication system has developed into forth generation mobile communication system, is the Long Term Evolution (LongTermEvolution/LongTermEvolution-Advanced, LTE/LTE-A) that International Organization for standardization 3GPP formulates.LTE system has two kinds of duplex modes, a kind of time division duplex (TimeDivisionDuplexing, referred to as TDD), and uplink and downlink link all adopts identical frequency, is separated by uplink downlink by selector switch from the time.Another kind is frequency division duplex mode (FrequencyDivisionDuplexing, referred to as FDD), and uplink and downlink link adopts different frequencies, by duplexer, uplink downlink is passed through frequency isolation, avoids producing interference.
And the radio communication such as Wifi carried out in Unlicensed frequency range, be a general designation of 802.11 series techniques that International Power organizes IEEE to develop, as 802.11a/g/n/ac etc.WiFi is mainly used in local radio communication, covers relatively little under normal circumstances, is a kind of simple and wireless communication means relatively at a low price.WiFi version work originally in the frequency of 2.4GHz, but due to the available bandwidth in 2.4GHz frequency range less, and the wireless transmitting device be operated in 2.4GHz frequency range is more, result in the WiFi hydraulic performance decline worked on 2.4GHz.WiFi has excavated new communication frequency 5GHz (note: 5GHz described herein does not refer to single frequency point, and refers to each frequency range near 5GHz can be understood as and is 5GHz frequency range described herein from 4.9GHz ~ 5.9GHz) on subsequent editions.Exempting to authorize in frequency range, owing to not carrying out the network planning, anyone can dispose WIFI system, when close two WIFI systems are in similar frequency bands transmitting wireless signals, will cause interference mutually and cannot proper communication.Therefore WIFI system can select (CarrierSelection) to avoid by carrier wave interference each other.In addition, because the band segment in 5GHz is used for radar system, in order to avoid the Wireless Telecom Equipment being operated in 5GHz frequency range causes interference to radar system, various countries to the requirement of these equipment except the conventional project such as power, frequency spectrum, also add the requirement to dynamic frequency selection (DynamicFrequencySelection, DFS) characteristic especially.
As previously mentioned, owing to exempting to authorize frequency range to need to be selected by carrier wave or the method for dynamic frequency selection is avoided from the interference between system or external system, be usually operated at and exempt to authorize the system of frequency range to be all adopt tdd systems, as WIFI, bluetooth.
But the capacity constraint of tdd systems in unauthorized frequency range, message transmission rate is low.
For above-mentioned problem, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of communication frequency system of selection and device, at least to solve the technical problem that tdd systems message transmission rate is low in unauthorized frequency range.
According to an aspect of the embodiment of the present invention, provide a kind of communication frequency system of selection, comprising: respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain and described multiple frequency range multiple current interference value one to one; And from described multiple frequency range, select uplink band for adopting frequency division duplex mode to carry out communicating and band downlink according to described multiple current interference value.
Further, respectively Interference Detection is being carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value after, described method also comprises: respectively inquiry with described multiple current interference value multiple corrected parameter one to one; Utilize described multiple corrected parameter to revise described multiple current interference value respectively, wherein, in described multiple corrected parameter, each corrected parameter is used for revising the current interference value corresponding with it; From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating is selected to comprise with band downlink according to described multiple current interference value: from described multiple frequency range, to select uplink band for adopting frequency division duplex mode to carry out communicating and band downlink according to revised multiple current interference value.
Further, utilize respectively described multiple current interference value inquiry obtain with described multiple current interference value one to one multiple corrected parameter before, described method also comprises: by carrying out simulation calculation to described multiple frequency range, the multiple theoretical interference value obtained, wherein, the corresponding multiple theoretical interference value of each frequency range in described multiple frequency range; By carrying out Interference Detection to described multiple frequency range, obtaining described multiple frequency range and recording interference value one to one; According to the correction algorithm pre-set according to the multiple theoretical interference value that each frequency range is corresponding corresponding with each frequency range described record the corrected parameter that interference value calculates each frequency range described.
Further, utilize respectively described multiple current interference value inquiry obtain with described multiple current interference value one to one multiple corrected parameter comprise: the disturbed condition determining described multiple frequency range respectively; Inquiry under described disturbed condition with described multiple current interference value multiple corrected parameter one to one.
Further, described multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to multiple uplink band predefined in unauthorized frequency range or predefined multiple band downlink, obtains multiple current interference value; From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: the uplink band selecting band downlink that in the band downlink of uplink band that in described predefined multiple uplink band, current interference value is minimum and symmetry thereof or described predefined multiple band downlink, current interference value is minimum and symmetry thereof.
Further, described multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to multiple uplink band predefined in unauthorized frequency range and predefined multiple band downlink, obtains multiple current interference value; From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: the uplink and downlink frequency range selecting the symmetry that average interference value is minimum in multiple uplink and downlink frequency ranges of described pre-defined symmetry, wherein, described average interference value is the mean value of the current interference value that current interference value that in described multiple uplink and downlink frequency range, uplink band is corresponding is corresponding with the band downlink of its symmetry.
Further, described multiple frequency range is predefined asymmetrical multiple uplink band and multiple band downlink in unauthorized frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to predefined multiple uplink band described in unauthorized frequency range and described predefined multiple band downlink, obtains multiple current interference value; From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: the band downlink that current interference value corresponding in the uplink band selecting in described predefined multiple uplink band corresponding current interference value minimum and described predefined multiple band downlink is minimum.
Further, described multiple frequency range is asymmetrical frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: from multiple frequency range, determine that all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; Uplink interference detection is carried out to all uplink bands in described all uplink and downlink frequency range combinations, obtains and described all uplink bands multiple current uplink interference value one to one; Descending Interference Detection is carried out to all band downlinks in described all uplink and downlink frequency range combinations; Obtain and described all band downlinks multiple current downlink interference value one to one; From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: the uplink and downlink frequency range combination selecting average interference value minimum from the uplink and downlink frequency range combination determined, wherein, described average interference value for described in the mean value of the current downlink interference value that current uplink interference value corresponding to uplink band is corresponding with band downlink in the uplink and downlink frequency range combination determined.
Further, described multiple frequency range is asymmetrical frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: from multiple frequency range, determine that all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; Uplink interference detection is carried out to all uplink bands in described all uplink and downlink frequency range combinations, obtains and described all uplink bands multiple current uplink interference value one to one; Descending Interference Detection is carried out to all band downlinks in described all uplink and downlink frequency range combinations; Obtain and described all band downlinks multiple current downlink interference value one to one; From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: to select current uplink interference corresponding to uplink band to be worth minimum uplink and downlink frequency range combination from the uplink and downlink frequency range combination determined, or, from the uplink and downlink frequency range combination that the current downlink interference value that the uplink and downlink frequency range combination selection band downlink determined is corresponding is minimum.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of communication frequency choice device, comprising: the first detecting unit, for carrying out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtaining and described multiple frequency range multiple current interference value one to one; And selected cell, for selecting uplink band for adopting frequency division duplex mode to carry out communicating and band downlink from described multiple frequency range according to described multiple current interference value.
Further, described device also comprises: query unit, for carrying out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value after, respectively inquiry with described multiple current interference value multiple corrected parameter one to one; Amending unit, for utilizing described multiple corrected parameter to revise described multiple current interference value respectively, wherein, in described multiple corrected parameter, each corrected parameter is used for revising the current interference value corresponding with it; Wherein, described selected cell also for selecting uplink band for adopting frequency division duplex mode to carry out communicating and band downlink from described multiple frequency range according to revised multiple current interference value.
Further, described device also comprises: simulation unit, for utilize respectively described multiple current interference value inquiry obtain with described multiple current interference value one to one multiple corrected parameter before, by carrying out simulation calculation to described multiple frequency range, the multiple theoretical interference value obtained, wherein, the corresponding multiple theoretical interference value of each frequency range in described multiple frequency range; Second detecting unit, for by carrying out Interference Detection to described multiple frequency range, obtaining described multiple frequency range and recording interference value one to one; Computing unit, for according to the correction algorithm pre-set according to the multiple theoretical interference value that each frequency range is corresponding corresponding with each frequency range described record the corrected parameter that interference value calculates each frequency range described.
Further, described query unit comprises: the first determination module, for determining the disturbed condition of described multiple frequency range respectively; Enquiry module, for inquiry under described disturbed condition with described multiple current interference value multiple corrected parameter one to one.
Further, described multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range, described first detecting unit also for carrying out Interference Detection respectively to multiple uplink band predefined in unauthorized frequency range or predefined multiple band downlink, obtains multiple current interference value; Described selected cell is also for selecting the uplink band of band downlink that in the band downlink of uplink band that in described predefined multiple uplink band, current interference value is minimum and symmetry thereof or described predefined multiple band downlink, current interference value is minimum and symmetry thereof.
Further, described multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range, described first detecting unit also for carrying out Interference Detection respectively to multiple uplink band predefined in unauthorized frequency range and predefined multiple band downlink, obtains multiple current interference value; Described selected cell is also for selecting the uplink and downlink frequency range of the symmetry that average interference value is minimum in multiple uplink and downlink frequency ranges of described pre-defined symmetry, wherein, described average interference value is the mean value of the current interference value that current interference value that in described multiple uplink and downlink frequency range, uplink band is corresponding is corresponding with the band downlink of its symmetry.
Further, described multiple frequency range is predefined asymmetrical multiple uplink band and multiple band downlink in unauthorized frequency range, described first detecting unit also for carrying out Interference Detection respectively to predefined multiple uplink band described in unauthorized frequency range and described predefined multiple band downlink, obtains multiple current interference value; Described selected cell is also for band downlink that current interference value corresponding in uplink band that to select in described predefined multiple uplink band corresponding current interference value minimum and described predefined multiple band downlink is minimum.
Further, described multiple frequency range is asymmetrical frequency range, and described first detecting unit comprises: the second determination module, for determining that from multiple frequency range all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; First detection module, for carrying out uplink interference detection to all uplink bands in described all uplink and downlink frequency range combinations, obtains and described all uplink bands multiple current uplink interference value one to one; Second detection module, for carrying out descending Interference Detection to all band downlinks in described all uplink and downlink frequency range combinations, obtains and described all band downlinks multiple current downlink interference value one to one; The uplink and downlink frequency range combination of described selected cell also for selecting average interference value minimum from the uplink and downlink frequency range combination determined, wherein, described average interference value for described in the mean value of the current downlink interference value that current uplink interference value corresponding to uplink band is corresponding with band downlink in the uplink and downlink frequency range combination determined.
Further, described multiple frequency range is asymmetrical frequency range, and described first detecting unit comprises: the 3rd determination module, for determining that from multiple frequency range all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; 3rd detection module, for carrying out uplink interference detection to all uplink bands in described all uplink and downlink frequency range combinations, obtains and described all uplink bands multiple current uplink interference value one to one; 4th detection module, for carrying out descending Interference Detection to all band downlinks in described all uplink and downlink frequency range combinations, obtains and described all band downlinks multiple current downlink interference value one to one; Described selected cell is also for selecting current uplink interference corresponding to uplink band to be worth minimum uplink and downlink frequency range combination from the uplink and downlink frequency range combination determined, or, from the uplink and downlink frequency range combination that the current downlink interference value that the uplink and downlink frequency range combination selection band downlink determined is corresponding is minimum.
According to the embodiment of the present application, by carrying out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtain and multiple frequency range multiple current interference value one to one, from multiple frequency range, for adopting frequency division duplex mode to carry out communicating uplink band and band downlink is selected according to multiple current interference value, thus it is more weak upper to utilize the current interference value that detects to be interfered from unauthorized Frequency Band Selection, band downlink, frequency division duplex mode is adopted to communicate, and under identical cost, the message transmission rate peak value of time division duplex is lower than frequency division duplex mode, and then solve the technical problem that tdd systems message transmission rate is low in unauthorized frequency range.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the communication frequency system of selection according to the embodiment of the present invention;
Fig. 2 is the uplink interference schematic diagram of terminal according to the interference source of the embodiment of the present invention;
Fig. 3 is the descending interference schematic diagram of base station according to the interference source of the embodiment of the present invention;
Fig. 4 is the schematic diagram of the communication frequency choice device according to the embodiment of the present invention.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to the embodiment of the present invention, provide a kind of embodiment of the method for communication frequency system of selection, it should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing.Preferably, the communication frequency system of selection in the embodiment of the present application can be have access point apparatus such as base station to perform.Although show logical order in flow charts, in some cases, can be different from the step shown or described by order execution herein.
Fig. 1 is the flow chart of the communication frequency system of selection according to the embodiment of the present invention, and as shown in Figure 1, the method comprises the steps:
Step S102, carries out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtains and multiple frequency range multiple current interference value one to one.
Step S104, selects uplink band for adopting frequency division duplex mode to carry out communicating and band downlink according to multiple current interference value from multiple frequency range.
In the present embodiment, pre-defined multiple frequency range in unauthorized (Unlicensed) frequency range, carrying out in the process communicated, Interference Detection is carried out to the plurality of frequency range, obtain the current interference value that each frequency range communicates at current time, and from multiple frequency ranges of definition, select uplink band and band downlink according to the current interference value detected, uplink band and band downlink are different frequency ranges, so that adopt frequency division duplex mode to communicate.
Wherein, predefined multiple frequency range can be symmetrical uplink and downlink frequency range, namely, each uplink band fixes corresponding one group of band downlink, when carrying out interference value and detecting, only can detect the current interference value of all uplink bands of definition, or, detect the current interference value of all band downlinks of definition, or detect the current interference value of uplink and downlink frequency range of all definition, then select to disturb more weak uplink and downlink frequency range by detecting the current interference value obtained.
Predefined multiple frequency range can be asymmetrical uplink and downlink frequency range, wherein, asymmetrical uplink and downlink frequency range can be provide one group of uplink band and one group of band downlink, also can be define one group of frequency range, so that the frequency range that therefrom selection two is different is as uplink and downlink frequency range.
According to the embodiment of the present application, by carrying out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtain and multiple frequency range multiple current interference value one to one, from multiple frequency range, for adopting frequency division duplex mode to carry out communicating uplink band and band downlink is selected according to multiple current interference value, thus it is more weak upper to utilize the current interference value that detects to be interfered from unauthorized Frequency Band Selection, band downlink, frequency division duplex mode is adopted to communicate, and under identical cost, the message transmission rate peak value of time division duplex is lower than frequency division duplex mode, and then solve the technical problem that tdd systems message transmission rate is low in unauthorized frequency range.
Such as, under the condition of identical cost, the capacity constraint of TD-LTE system.The TDD system of a carrier wave is 1:3 in up-downgoing carrier wave proportioning, and when special subframe proportioning is 10:2:2, downlink peak rates is 110Mbps, and upstream peak speed only has 10Mbps.But the FDD system of a carrier wave, downlink peak rates is 150Mbps, and upstream peak speed can reach 50Mbps.
In addition, when communicating owing to adopting time division duplex, user does uplink at partial time slot, when doing the network planning, needing this loss to take into account, and then reducing the coverage of network.Adopt frequency division duplex mode communication then can avoid the problems referred to above.
Preferably, respectively Interference Detection is being carried out to multiple frequency range predefined in unauthorized frequency range, obtain with multiple frequency range one to one multiple current interference value after, method also comprises: respectively inquiry with multiple current interference value multiple corrected parameter one to one; Utilize multiple corrected parameter to revise multiple current interference value respectively, wherein, in multiple corrected parameter, each corrected parameter is used for revising the current interference value corresponding with it; From multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating is selected to comprise with band downlink according to multiple current interference value: from multiple frequency range, to select uplink band for adopting frequency division duplex mode to carry out communicating and band downlink according to revised multiple current interference value.
Error is there is between the interference value obtained due to detection and actual interference value, that is to say, detecting the current interference value the actual interference value of non-present that obtain, in the present embodiment, corrected parameter corresponding to each frequency range can be obtained according to carrying out in advance analytical calculation, and store like this, when carrying out Frequency Band Selection, corresponding corrected parameter can be inquired about, in order to revise the current interference value detected, thus improve the accuracy of current interference value, and then ensure that the frequency range selected is disturbed little.
Preferably, utilize respectively the inquiry of multiple current interference value obtain with multiple current interference value one to one multiple corrected parameter before, method also comprises: by carrying out simulation calculation to multiple frequency range, the multiple theoretical interference value obtained, wherein, the corresponding multiple theoretical interference value of each frequency range in multiple frequency range; By carrying out Interference Detection to multiple frequency range, obtaining multiple frequency range and recording interference value one to one; According to the correction algorithm pre-set according to the multiple theoretical interference value that each frequency range is corresponding corresponding with each frequency range record the corrected parameter that interference value calculates each frequency range.
In the present embodiment, the corrected parameter of each frequency range can be the theoretical interference value that obtained by simulation calculation and detect the interference value that records obtained and calculate according to default account form.Wherein, theoretical interference value can by carrying out analogue simulation to the position of different subscriber equipmenies, the multiple theoretical interference value calculated, and recording interference value can be adopt identical detection mode to detect the interference value obtained with above-mentioned current interference value.
Alternatively, the embodiment of the present application can adopt following several mode to calculate correction interference value:
(1) maximum interference correction: delta_D=max (I1, I2, I3, I4 ..., Ii ..., IN) and-IM;
(2) average interference correction: delta_D=average (I1, I2, I3, I4 ..., Ii ..., IN) and-IM;
(3) X% disturbs ratio correction: P (Ii>Ix) <=x%, and selected Ix, the probability making theoretical disturbed condition be greater than Ix is less than X%, delta_D=Ix – IM.
Wherein, delta_D is corrected parameter, I1, I2, I3, I4 ..., Ii ..., IN is representation theory interference value respectively, and IM represents and records interference value.
In the embodiment of the present application, record interference value and also can be through the mean value of multiple surveys interference value that repeated detection obtains, maximum or set point value etc. wherein.
Preferably, utilize respectively the inquiry of multiple current interference value obtain with multiple current interference value one to one multiple corrected parameter comprise: the disturbed condition determining multiple frequency range respectively; Inquiry in an interference situation with multiple current interference value multiple corrected parameter one to one.
In the embodiment of the present application, when the Interference Detection of frequency range be by access point apparatus detect obtain time, the disturbed condition of the downstream frequency that such as base station is detected, the Sniffer arranged by base station is detected and obtains.When real system transmits, because this frequency does downlink transfer, actual that be interfered is user, so the disturbed condition detected and actual disturbed condition have certain difference.In addition, because the uplink and downlink transmission situation of interference source is different, the interference that detects and actual interference also can be made to have difference.Disturbed condition can be divided into several, comprising: interference source is uplink; Interference source is downlink transfer; Interference source is uplink and downlink transfer.
Be uplink and interference source to interference source respectively below in conjunction with Fig. 2 and Fig. 3 be that downlink transfer is described.
When interference source is uplink, its disturbed condition as shown in Figure 2.Recording interference value is that uplink user equipment arrives the disturbed condition measuring base station, is expressed as IM.
Actual interference is the interference of uplink user to downlink user, all can have different interference values to different customer locations, can be obtained by simulation calculation, i.e. theoretical interference value, be expressed as I1, I2, I3, I4 ..., Ii ..., IN}.Theoretical interference value can be obtained by the measurement situation of other similar operational network.
Utilize theoretical interference value and record the corrected parameter delta_UD that interference value calculates uplink interference, following several mode can be adopted:
Maximum interference correction: delta_UD=max (I1, I2, I3, I4 ..., Ii ..., IN) and-IM
Average interference correction: delta_UD=average (I1, I2, I3, I4 ..., Ii ..., IN) and-IM
X% disturbs ratio correction: P (Ii>Ix) <=x%, and selected Ix, the probability making actual capabilities disturbed condition be greater than Ix is less than X%, delta_UD=Ix – IM.
When interference source is downlink transfer, its disturbed condition as shown in Figure 3.Record interference for descending base station is to the disturbed condition measuring base station, be expressed as I ' M.
Actual interference is the interference of descending base station to downlink user, all can have different interference values to different customer locations, can be obtained by simulation calculation, i.e. theoretical interference value, be expressed as ' 3, I ' 4, I ' 1, I ' 2, I ..., I ' i ..., I ' N}.Theoretical interference value can be obtained by the measurement situation of other similar operational network.
Utilize theoretical interference value and record the corrected parameter delta_DD that interference value calculates descending interference, following several mode can be adopted:
Maximum interference correction: delta_DD=max (' 3, I ' 4, I ' 1, I ' 2, I ..., I ' i ..., I ' N) – I ' M
Average interference correction: delta_DD=average (' 3, I ' 4, I ' 1, I ' 2, I ..., I ' i ..., I ' N) – I ' M
X% disturbs ratio correction: and P (I ' i>I ' x) <=x%, selected I ' x, the probability making actual capabilities disturbed condition be greater than I ' x is less than X%, delta_DD=I ' x – I ' M.
In the present embodiment, be the situation of time division duplex for interference source, can according to the up-downgoing proportioning of interference source, to obtaining corresponding corrected parameter, such as, suppose delta_UD=2dB, delta_DD=7dB, interferential loads value when up-downgoing proportioning is 2:2 is 0.5*2+0.5*7=4.5dB.Wherein, the up-downgoing proportioning of interference source can obtain in the following manner: base station, by detecting the system message of interference source, obtains the uplink and downlink proportioning of interference source; Base station, by detecting the situation of change of interference source interference, obtains the uplink and downlink proportioning of interference source; Base station obtains the uplink and downlink proportioning situation of interference source, as by acquisitions such as SON server or network management systems by third-party server.
Preferably, multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to multiple uplink band predefined in unauthorized frequency range or predefined multiple band downlink, obtains multiple current interference value; From multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to multiple current interference value: the uplink band selecting band downlink that in the band downlink of uplink band that in predefined multiple uplink band, current interference value is minimum and symmetry thereof or predefined multiple band downlink, current interference value is minimum and symmetry thereof.
In the present embodiment, pre-defined symmetrical multiple uplink and downlink frequency ranges, when carrying out Interference Detection, only detect uplink band or band downlink, utilize the uplink band (or band downlink) that the current interference value detected selects interference less, again according to symmetric relation, select corresponding band downlink (or uplink band).Below to be detected as example to band downlink, carry out illustrating.
For 5.1GHz and 5.8GHz frequency range, supposing the system defines behavior 5150-5250MHz, descending 5725-5825MHz, and system bandwidth is 20MHz, then the corresponding frequency of 5 uplink and downlink symmetries.Frequency 1 is up 5150-5170MHz, descending 5725-5745MHz, and frequency 2 is up 5170-5190MHz, descending 5745-5765MHz ...In this case, the uplink and downlink link direction of system definition and the frequency information of symmetry as shown in table 1.
Table 1
Base station is detected the interference of surrounding by Sniffer, travels through all downstream frequency 5725-5825MHz, detects the current interference value that all downstream frequencys are corresponding, as shown in table 2.
Table 2
In this situation, interference value is all added up to all downstream frequencys in base station, and such as frequency 1 detects that interference value is-70dBm/20MHz, and frequency 2 detects that interference value is-60dBm/20MHz etc.
In this case, can find out, the disturbed condition of frequency 3 is less, and frequency 3 can be selected as uplink and downlink frequency.But in order to ensure accuracy, above-mentioned correcting mode is revised disturbed condition,
Suppose delta_UD=2dB, delta_DD=7dB, interferential loads value when up-downgoing proportioning is 2:2 is that 0.5*2+0.5*7=4.5dB, DL represent descending interference, and UL represents uplink interference, shown in revised disturbed condition table 3:
Table 3
Selecting to revise the minimum frequency of rear interference from measuring frequency is downstream frequency, and symmetrical frequency is upstream frequency.Select frequency 4:5210-5230MHz to do in this citing up, 5785-5805MHz does downlink transfer.
In the present embodiment, if only detect upstream frequency, it is identical with the mode detecting downstream frequency, does not repeat here.
According to the embodiment of the present application, select up-downgoing frequency range by the current interference value detecting uplink band or band downlink, the frequency range of detection is few, and then improves the speed of Frequency Band Selection.
Alternatively, multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to multiple uplink band predefined in unauthorized frequency range and predefined multiple band downlink, obtains multiple current interference value; From multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to multiple current interference value: the uplink and downlink frequency range selecting the symmetry that average interference value is minimum in pre-defined symmetrical multiple uplink and downlink frequency ranges, wherein, average interference value is the mean value of the current interference value that current interference value that in multiple uplink and downlink frequency range, uplink band is corresponding is corresponding with the band downlink of its symmetry.
The present embodiment is then detect uplink band and band downlink simultaneously, for frequency range defined above, is illustrated.
Through Interference Detection and to carry out the current interference value of revised uplink and downlink frequency range as shown in table 4:
Table 4
In this case, the average interference value of frequency 3 is-69dBm/20MHz, and its interference is minimum, therefore, selects frequency 3, up 5190-5210MHz, descending 5765-5785MHz.
According to the embodiment of the present application, by carrying out Interference Detection respectively to upper and lower frequency range and revising, thus ensure that uplink and downlink Communication Jamming is all in less level, improve communication quality.
Alternatively, multiple frequency range is predefined asymmetrical multiple uplink band and multiple band downlink in unauthorized frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to multiple uplink band predefined in unauthorized frequency range and predefined multiple band downlink, obtains multiple current interference value; From multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to multiple current interference value: the band downlink that current interference value corresponding in the uplink band selecting in predefined multiple uplink band corresponding current interference value minimum and predefined multiple band downlink is minimum.
In the present embodiment, predefined frequency resource is asymmetrical multiple uplink band and multiple band downlink, and respectively Interference Detection is carried out to each frequency range, a uplink band is selected from multiple uplink band, a band downlink is selected, for communicating, like this from multiple band downlink, the minimum uplink band of interference and band downlink can be selected, thus ensure communication quality.
Such as, for 5.1GHz and 5.8GHz frequency range, supposing the system defines behavior 5150-5250MHz, system bandwidth is 20MHz, then corresponding 5 upstream frequencys, frequency 1 is up 5150-5170MHz, and frequency 2 is up 5170-5190MHz ... lower behavior 5725-5850MHz, system bandwidth is 20MHz, then corresponding 6 downstream frequencys, and frequency 6 is descending 5725-5745MHz, frequency 7 is descending 5745-5765MHz ...Define uplink and downlink link direction and asymmetrical frequency information, as shown in table 5.
Table 5
All frequencies of uplink and downlink are all detected, records disturbed condition.Such as measure the disturbed condition of all frequencies of 5150-5250MHz and 5725-5850MHz, suppose that the interference size after Interference Detection and interferential loads is as shown in table 6:
Table 6
In this embodiment, the interference of frequency 3:5190-5210MHz is minimum, and the interference of frequency 11:5825-5845MHz is minimum, and therefore, select frequency 3 as uplink band, frequency 11 is as band downlink.
Alternatively, multiple frequency range is asymmetrical frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with multiple frequency range one to one multiple current interference value comprise: from multiple frequency range, determine that all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; Uplink interference detection is carried out to all uplink bands in all uplink and downlink frequency range combinations, obtains and all uplink bands multiple current uplink interference value one to one; Descending Interference Detection is carried out to all band downlinks in all uplink and downlink frequency range combinations; Obtain and all band downlinks multiple current downlink interference value one to one; From multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to multiple current interference value: the uplink and downlink frequency range combination selecting average interference value minimum from the uplink and downlink frequency range combination determined, wherein, average interference value is the mean value of the current downlink interference value that in the uplink and downlink frequency range combination determined, current uplink interference value corresponding to uplink band is corresponding with band downlink.
In the present embodiment, same location be asymmetrical frequency range, but do not specify up-downgoing frequency range, therefore, can combine at random, wherein, include same frequency but the combination defining different up-downgoing frequency ranges belongs to different combinations, such as, combination: { frequency 1-is up, frequency 4-is descending }, and combination: { frequency 1-is descending, and frequency 4-is up } is different combinations.After determining all combination of frequencies, Interference Detection (and correction) is carried out to each combination of frequency, thus determine corresponding current interference value, so that the combination of frequency therefrom selecting the interference of the average interference value of two frequency ranges in combination less, as up-downgoing frequency range.
Alternatively, in the embodiment of the present application, can also be that respectively Interference Detection is carried out to predefined frequency range, then from multiple frequency range, determine that all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set, interferential loads is carried out to all combinations, obtain revised current interference value, select the combination that average interference value is minimum.
Such as, for 5.1GHz and 5.8GHz frequency range, it is 5150-5250MHz and 5725-5850MHz that supposing the system defines usable spectrum, and system bandwidth is 20MHz, then corresponding 11 frequencies, frequency 1 is 5150-5170MHz, frequency 2 is 5170-5190MHz ..., frequency 6 is 5725-5745MHz, frequency 7 is 5745-5765MHz ...All frequencies can carry out up or downlink transfer, as shown in table 7.In order to ensure that system up-downgoing is not disturbed, system defines Duplex Spacing equally, such as 40MHz.
Table 7
Carry out Interference Detection to each frequency range, the interference value obtained is as shown in table 8:
Table 8
Consider that Duplex Spacing is under the condition of 40MHz hypothesis, the frequency of uplink and downlink transmission at least needs 40MHz frequency interval.Therefore possible combination of frequency is { Isosorbide-5-Nitrae }, 1,5}, and 1,6} ..., 1,11}, and 2,5}, 2,6} ..., 2,11} ..., 3,6}, 3,7} ..., 3,11} ..., { 8,11}.
Therefore in different combination of frequency situations, suppose different uplink and downlink transmission, carry out interferential loads.Such as combine frequency 1 and frequency 4, first suppose that frequency 1 is up, frequency 4 is descending, then revises the interference detected.Suppose that frequency 1 is descending again, frequency 4 is up, revises the interference detected.The method is used to travel through all combination of frequencies and different uplink and downlink transmission situation, the combination of frequency selecting average interference minimum and uplink and downlink transmission.
Alternatively, multiple frequency range is asymmetrical frequency range, respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with multiple frequency range one to one multiple current interference value comprise: from multiple frequency range, determine that all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; Uplink interference detection is carried out to all uplink bands in all uplink and downlink frequency range combinations, obtains and all uplink bands multiple current uplink interference value one to one; Descending Interference Detection is carried out to all band downlinks in all uplink and downlink frequency range combinations; Obtain and all band downlinks multiple current downlink interference value one to one; From multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to multiple current interference value: to select current uplink interference corresponding to uplink band to be worth minimum uplink and downlink frequency range combination from the uplink and downlink frequency range combination determined, or, from the uplink and downlink frequency range combination that the current downlink interference value that the uplink and downlink frequency range combination selection band downlink determined is corresponding is minimum.
Asymmetrical frequency range in the present embodiment and previous embodiment is similar, it is distinguished and is in the present embodiment and utilizes the average interference value of combination of frequency to combine to select up-downgoing frequency range, but select according to uplink band in combination or interference value corresponding to band downlink, to select uplink band or the minimum combination of interference value corresponding to band downlink.
According to the embodiment of the present application, by frequency division duplex mode is used for unauthorized frequency range, the frequency agile namely can choosing uplink and downlink respectively avoids the interference problem of unauthorized frequency range, can promote network capacity again.
The embodiment of the present application additionally provides a kind of communication frequency choice device, and as described in Figure 4, this communication frequency choice device comprises: the first detecting unit 10 and selected cell 20.
First detecting unit 10, for carrying out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtains and multiple frequency range multiple current interference value one to one.
Selected cell 20 for selecting uplink band for adopting frequency division duplex mode to carry out communicating and band downlink from multiple frequency range according to multiple current interference value.
In the present embodiment, pre-defined multiple frequency range in unauthorized (Unlicensed) frequency range, carrying out in the process communicated, Interference Detection is carried out to the plurality of frequency range, obtain the current interference value that each frequency range communicates at current time, and from multiple frequency ranges of definition, select uplink band and band downlink according to the current interference value detected, uplink band and band downlink are different frequency ranges, so that adopt frequency division duplex mode to communicate.
Wherein, predefined multiple frequency range can be symmetrical uplink and downlink frequency range, namely, each uplink band fixes corresponding one group of band downlink, when carrying out interference value and detecting, only can detect the current interference value of all uplink bands of definition, or, detect the current interference value of all band downlinks of definition, or detect the current interference value of uplink and downlink frequency range of all definition, then select to disturb more weak uplink and downlink frequency range by detecting the current interference value obtained.
Predefined multiple frequency range can be asymmetrical uplink and downlink frequency range, wherein, asymmetrical uplink and downlink frequency range can be provide one group of uplink band and one group of band downlink, also can be define one group of frequency range, so that the frequency range that therefrom selection two is different is as uplink and downlink frequency range.
According to the embodiment of the present application, by carrying out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtain and multiple frequency range multiple current interference value one to one, from multiple frequency range, for adopting frequency division duplex mode to carry out communicating uplink band and band downlink is selected according to multiple current interference value, thus it is more weak upper to utilize the current interference value that detects to be interfered from unauthorized Frequency Band Selection, band downlink, frequency division duplex mode is adopted to communicate, and under identical cost, the message transmission rate peak value of time division duplex is lower than frequency division duplex mode, and then solve the technical problem that tdd systems message transmission rate is low in unauthorized frequency range.
Such as, under the condition of identical cost, the capacity constraint of TD-LTE system.The TDD system of a carrier wave is 1:3 in up-downgoing carrier wave proportioning, and when special subframe proportioning is 10:2:2, downlink peak rates is 110Mbps, and upstream peak speed only has 10Mbps.But the FDD system of a carrier wave, downlink peak rates is 150Mbps, and upstream peak speed can reach 50Mbps.
In addition, when communicating owing to adopting time division duplex, user does uplink at partial time slot, when doing the network planning, needing this loss to take into account, and then reducing the coverage of network.Adopt frequency division duplex mode communication then can avoid the problems referred to above.
Preferably, device also comprises: query unit, for carrying out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtain with multiple frequency range one to one multiple current interference value after, respectively inquiry with multiple current interference value multiple corrected parameter one to one; Amending unit, for utilizing multiple corrected parameter to revise multiple current interference value respectively, wherein, in multiple corrected parameter, each corrected parameter is used for revising the current interference value corresponding with it; Wherein, selected cell also for selecting uplink band for adopting frequency division duplex mode to carry out communicating and band downlink from multiple frequency range according to revised multiple current interference value.
Error is there is between the interference value obtained due to detection and actual interference value, that is to say, detecting the current interference value the actual interference value of non-present that obtain, in the present embodiment, corrected parameter corresponding to each frequency range can be obtained according to carrying out in advance analytical calculation, and store like this, when carrying out Frequency Band Selection, corresponding corrected parameter can be inquired about, in order to revise the current interference value detected, thus improve the accuracy of current interference value, and then ensure that the frequency range selected is disturbed little.
Preferably, device also comprises: simulation unit, for utilize respectively the inquiry of multiple current interference value obtain with multiple current interference value one to one multiple corrected parameter before, by carrying out simulation calculation to multiple frequency range, the multiple theoretical interference value obtained, wherein, the corresponding multiple theoretical interference value of each frequency range in multiple frequency range; Second detecting unit, for by carrying out Interference Detection to multiple frequency range, obtaining multiple frequency range and recording interference value one to one; Computing unit, for according to the correction algorithm pre-set according to the multiple theoretical interference value that each frequency range is corresponding corresponding with each frequency range record the corrected parameter that interference value calculates each frequency range.
In the present embodiment, the corrected parameter of each frequency range can be the theoretical interference value that obtained by simulation calculation and detect the interference value that records obtained and calculate according to default account form.Wherein, theoretical interference value can by carrying out analogue simulation to the position of different subscriber equipmenies, the multiple theoretical interference value calculated, and recording interference value can be adopt identical detection mode to detect the interference value obtained with above-mentioned current interference value.
Alternatively, the embodiment of the present application can adopt following several mode to calculate correction interference value:
(1) maximum interference correction: delta_D=max (I1, I2, I3, I4 ..., Ii ..., IN) and-IM;
(2) average interference correction: delta_D=average (I1, I2, I3, I4 ..., Ii ..., IN) and-IM;
(3) X% disturbs ratio correction: P (Ii>Ix) <=x%, and selected Ix, the probability making theoretical disturbed condition be greater than Ix is less than X%, delta_D=Ix – IM.
Wherein, delta_D is corrected parameter, I1, I2, I3, I4 ..., Ii ..., IN is representation theory interference value respectively, and IM represents and records interference value.
In the embodiment of the present application, record interference value and also can be through the mean value of multiple surveys interference value that repeated detection obtains, maximum or set point value etc. wherein.
Preferably, query unit comprises: the first determination module, for determining the disturbed condition of multiple frequency range respectively; Enquiry module, for inquiry in an interference situation with multiple current interference value multiple corrected parameter one to one.
In the embodiment of the present application, when the Interference Detection of frequency range be by access point apparatus detect obtain time, the disturbed condition of the downstream frequency that such as base station is detected, the Sniffer arranged by base station is detected and obtains.When real system transmits, because this frequency does downlink transfer, actual that be interfered is user, so the disturbed condition detected and actual disturbed condition have certain difference.In addition, because the uplink and downlink transmission situation of interference source is different, the interference that detects and actual interference also can be made to have difference.Disturbed condition can be divided into several, comprising: interference source is uplink; Interference source is downlink transfer; Interference source is uplink and downlink transfer.
Be uplink and interference source to interference source respectively below in conjunction with Fig. 2 and Fig. 3 be that downlink transfer is described.
When interference source is uplink, its disturbed condition as shown in Figure 2.Recording interference value is that uplink user equipment arrives the disturbed condition measuring base station, is expressed as IM.
Actual interference is the interference of uplink user to downlink user, all can have different interference values to different customer locations, can be obtained by simulation calculation, i.e. theoretical interference value, be expressed as I1, I2, I3, I4 ..., Ii ..., IN}.Theoretical interference value can be obtained by the measurement situation of other similar operational network.
Utilize theoretical interference value and record the corrected parameter delta_UD that interference value calculates uplink interference, following several mode can be adopted:
Maximum interference correction: delta_UD=max (I1, I2, I3, I4 ..., Ii ..., IN) and-IM
Average interference correction: delta_UD=average (I1, I2, I3, I4 ..., Ii ..., IN) and-IM
X% disturbs ratio correction: P (Ii>Ix) <=x%, and selected Ix, the probability making actual capabilities disturbed condition be greater than Ix is less than X%, delta_UD=Ix – IM.
When interference source is downlink transfer, its disturbed condition as shown in Figure 3.Record interference for descending base station is to the disturbed condition measuring base station, be expressed as I ' M.
Actual interference is the interference of descending base station to downlink user, all can have different interference values to different customer locations, can be obtained by simulation calculation, i.e. theoretical interference value, be expressed as ' 3, I ' 4, I ' 1, I ' 2, I ..., I ' i ..., I ' N}.Theoretical interference value can be obtained by the measurement situation of other similar operational network.
Utilize theoretical interference value and record the corrected parameter delta_DD that interference value calculates descending interference, following several mode can be adopted:
Maximum interference correction: delta_DD=max (' 3, I ' 4, I ' 1, I ' 2, I ..., I ' i ..., I ' N) – I ' M
Average interference correction: delta_DD=average (' 3, I ' 4, I ' 1, I ' 2, I ..., I ' i ..., I ' N) – I ' M
X% disturbs ratio correction: and P (I ' i>I ' x) <=x%, selected I ' x, the probability making actual capabilities disturbed condition be greater than I ' x is less than X%, delta_DD=I ' x – I ' M.
In the present embodiment, be the situation of time division duplex for interference source, can according to the up-downgoing proportioning of interference source, to obtaining corresponding corrected parameter, such as, suppose delta_UD=2dB, delta_DD=7dB, interferential loads value when up-downgoing proportioning is 2:2 is 0.5*2+0.5*7=4.5dB.Wherein, the up-downgoing proportioning of interference source can obtain in the following manner: base station, by detecting the system message of interference source, obtains the uplink and downlink proportioning of interference source; Base station, by detecting the situation of change of interference source interference, obtains the uplink and downlink proportioning of interference source; Base station obtains the uplink and downlink proportioning situation of interference source, as by acquisitions such as SON server or network management systems by third-party server.
Preferably, multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range, first detecting unit also for carrying out Interference Detection respectively to multiple uplink band predefined in unauthorized frequency range or predefined multiple band downlink, obtains multiple current interference value; Selected cell is also for selecting the uplink band of band downlink that in the band downlink of uplink band that in predefined multiple uplink band, current interference value is minimum and symmetry thereof or predefined multiple band downlink, current interference value is minimum and symmetry thereof.
In the present embodiment, pre-defined symmetrical multiple uplink and downlink frequency ranges, when carrying out Interference Detection, only detect uplink band or band downlink, utilize the uplink band (or band downlink) that the current interference value detected selects interference less, again according to symmetric relation, select corresponding band downlink (or uplink band).Below to be detected as example to band downlink, carry out illustrating.
For 5.1GHz and 5.8GHz frequency range, supposing the system defines behavior 5150-5250MHz, descending 5725-5825MHz, and system bandwidth is 20MHz, then the corresponding frequency of 5 uplink and downlink symmetries.Frequency 1 is up 5150-5170MHz, descending 5725-5745MHz, and frequency 2 is up 5170-5190MHz, descending 5745-5765MHz ...In this case, the uplink and downlink link direction of system definition and the frequency information of symmetry as shown in table 1.
Base station is detected the interference of surrounding by Sniffer, travels through all downstream frequency 5725-5825MHz, detects the current interference value that all downstream frequencys are corresponding, as shown in table 2.
In this situation, interference value is all added up to all downstream frequencys in base station, and such as frequency 1 detects that interference value is-70dBm/20MHz, and frequency 2 detects that interference value is-60dBm/20MHz etc.
In this case, can find out, the disturbed condition of frequency 3 is less, and frequency 3 can be selected as uplink and downlink frequency.But in order to ensure accuracy, above-mentioned correcting mode is revised disturbed condition,
Suppose delta_UD=2dB, delta_DD=7dB, interferential loads value when up-downgoing proportioning is 2:2 is that 0.5*2+0.5*7=4.5dB, DL represent descending interference, and UL represents uplink interference, shown in revised disturbed condition table 3.
Selecting to revise the minimum frequency of rear interference from measuring frequency is downstream frequency, and symmetrical frequency is upstream frequency.Select frequency 4:5210-5230MHz to do in this citing up, 5785-5805MHz does downlink transfer.
In the present embodiment, if only detect upstream frequency, it is identical with the mode detecting downstream frequency, does not repeat here.
According to the embodiment of the present application, select up-downgoing frequency range by the current interference value detecting uplink band or band downlink, the frequency range of detection is few, and then improves the speed of Frequency Band Selection.
Alternatively, multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range, first detecting unit also for carrying out Interference Detection respectively to multiple uplink band predefined in unauthorized frequency range and predefined multiple band downlink, obtains multiple current interference value; Selected cell is also for selecting the uplink and downlink frequency range of the symmetry that average interference value is minimum in pre-defined symmetrical multiple uplink and downlink frequency ranges, wherein, average interference value is the mean value of the current interference value that current interference value that in multiple uplink and downlink frequency range, uplink band is corresponding is corresponding with the band downlink of its symmetry.
The present embodiment is then detect uplink band and band downlink simultaneously, for frequency range defined above, is illustrated.
Through Interference Detection and to carry out the current interference value of revised uplink and downlink frequency range as shown in table 4.
In this case, the average interference value of frequency 3 is-69dBm/20MHz, and its interference is minimum, therefore, selects frequency 3, up 5190-5210MHz, descending 5765-5785MHz.
According to the embodiment of the present application, by carrying out Interference Detection respectively to upper and lower frequency range and revising, thus ensure that uplink and downlink Communication Jamming is all in less level, improve communication quality.
Alternatively, multiple frequency range is predefined asymmetrical multiple uplink band and multiple band downlink in unauthorized frequency range, first detecting unit also for carrying out Interference Detection respectively to multiple uplink band predefined in unauthorized frequency range and predefined multiple band downlink, obtains multiple current interference value; Selected cell is also for band downlink that current interference value corresponding in uplink band that to select in predefined multiple uplink band corresponding current interference value minimum and predefined multiple band downlink is minimum.
In the present embodiment, predefined frequency resource is asymmetrical multiple uplink band and multiple band downlink, and respectively Interference Detection is carried out to each frequency range, a uplink band is selected from multiple uplink band, a band downlink is selected, for communicating, like this from multiple band downlink, the minimum uplink band of interference and band downlink can be selected, thus ensure communication quality.
Such as, for 5.1GHz and 5.8GHz frequency range, supposing the system defines behavior 5150-5250MHz, system bandwidth is 20MHz, then corresponding 5 upstream frequencys, frequency 1 is up 5150-5170MHz, and frequency 2 is up 5170-5190MHz ... lower behavior 5725-5850MHz, system bandwidth is 20MHz, then corresponding 6 downstream frequencys, and frequency 6 is descending 5725-5745MHz, frequency 7 is descending 5745-5765MHz ...Define uplink and downlink link direction and asymmetrical frequency information, as shown in table 5.
All frequencies of uplink and downlink are all detected, records disturbed condition.Such as measure the disturbed condition of all frequencies of 5150-5250MHz and 5725-5850MHz, suppose that the interference size after Interference Detection and interferential loads is as shown in table 6.
In this embodiment, the interference of frequency 3:5190-5210MHz is minimum, and the interference of frequency 11:5825-5845MHz is minimum, and therefore, select frequency 3 as uplink band, frequency 11 is as band downlink.
Alternatively, multiple frequency range is asymmetrical frequency range, and the first detecting unit comprises: the second determination module, for determining that from multiple frequency range all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; First detection module, for carrying out uplink interference detection to all uplink bands in all uplink and downlink frequency range combinations, obtains and all uplink bands multiple current uplink interference value one to one; Second detection module, for carrying out descending Interference Detection to all band downlinks in all uplink and downlink frequency range combinations, obtains and all band downlinks multiple current downlink interference value one to one; The uplink and downlink frequency range combination of selected cell also for selecting average interference value minimum from the uplink and downlink frequency range combination determined, wherein, average interference value is the mean value of the current downlink interference value that in the uplink and downlink frequency range combination determined, current uplink interference value corresponding to uplink band is corresponding with band downlink.
In the present embodiment, same location be asymmetrical frequency range, but do not specify up-downgoing frequency range, therefore, can combine at random, wherein, include same frequency but the combination defining different up-downgoing frequency ranges belongs to different combinations, such as, combination: { frequency 1-is up, frequency 4-is descending }, and combination: { frequency 1-is descending, and frequency 4-is up } is different combinations.After determining all combination of frequencies, Interference Detection (and correction) is carried out to each combination of frequency, thus determine corresponding current interference value, so that the combination of frequency therefrom selecting the interference of the average interference value of two frequency ranges in combination less, as up-downgoing frequency range.
Alternatively, multiple frequency range is asymmetrical frequency range, and the first detecting unit comprises: the 3rd determination module, for determining that from multiple frequency range all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; 3rd detection module, for carrying out uplink interference detection to all uplink bands in all uplink and downlink frequency range combinations, obtains and all uplink bands multiple current uplink interference value one to one; 4th detection module, for carrying out descending Interference Detection to all band downlinks in all uplink and downlink frequency range combinations, obtains and all band downlinks multiple current downlink interference value one to one; Selected cell is also for selecting current uplink interference corresponding to uplink band to be worth minimum uplink and downlink frequency range combination from the uplink and downlink frequency range combination determined, or, from the uplink and downlink frequency range combination that the current downlink interference value that the uplink and downlink frequency range combination selection band downlink determined is corresponding is minimum.
Asymmetrical frequency range in the present embodiment and previous embodiment is similar, it is distinguished and is in the present embodiment and utilizes the average interference value of combination of frequency to combine to select up-downgoing frequency range, but select according to uplink band in combination or interference value corresponding to band downlink, to select uplink band or the minimum combination of interference value corresponding to band downlink.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.In the process that above-described embodiment (comprising embodiment of the method and device embodiment) is described, cited frequency range, as 5.1GHz and 5.8GHz frequency range etc., be only used to describe the example cited by the specific embodiment of the present invention, the technical scheme of the embodiment of the present invention can apply any frequency range in unauthorized frequency range, and above-described embodiment does not make improper restriction to the present invention.Preferably, up employing 2.4GHz or 3.5GHz transmits, and descending employing 5.1GHz or 5.8GHz, can either make full use of the frequency spectrum resource of unauthorized frequency range, can ensure again the unification of uplink and downlink coverage.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. a communication frequency system of selection, is characterized in that, comprising:
Respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtains and described multiple frequency range multiple current interference value one to one; And
From described multiple frequency range, for adopting frequency division duplex mode to carry out communicating uplink band and band downlink is selected according to described multiple current interference value.
2. method according to claim 1, is characterized in that,
Respectively Interference Detection is being carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value after, described method also comprises: respectively inquiry with described multiple current interference value multiple corrected parameter one to one; Utilize described multiple corrected parameter to revise described multiple current interference value respectively, wherein, in described multiple corrected parameter, each corrected parameter is used for revising the current interference value corresponding with it;
From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating is selected to comprise with band downlink according to described multiple current interference value: from described multiple frequency range, to select uplink band for adopting frequency division duplex mode to carry out communicating and band downlink according to revised multiple current interference value.
3. method according to claim 2, is characterized in that, utilize respectively described multiple current interference value inquiry obtain with described multiple current interference value one to one multiple corrected parameter before, described method also comprises:
By carrying out simulation calculation to described multiple frequency range, the multiple theoretical interference value obtained, wherein, the corresponding multiple theoretical interference value of each frequency range in described multiple frequency range;
By carrying out Interference Detection to described multiple frequency range, obtaining described multiple frequency range and recording interference value one to one;
According to the correction algorithm pre-set according to the multiple theoretical interference value that each frequency range is corresponding corresponding with each frequency range described record the corrected parameter that interference value calculates each frequency range described.
4. method according to claim 2, is characterized in that, utilize respectively described multiple current interference value inquiry obtain with described multiple current interference value one to one multiple corrected parameter comprise:
Determine the disturbed condition of described multiple frequency range respectively;
Inquiry under described disturbed condition with described multiple current interference value multiple corrected parameter one to one.
5. the method according to any one of Claims 1-4, is characterized in that, described multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range,
Respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to multiple uplink band predefined in unauthorized frequency range or predefined multiple band downlink, obtains multiple current interference value;
From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: the uplink band selecting band downlink that in the band downlink of uplink band that in described predefined multiple uplink band, current interference value is minimum and symmetry thereof or described predefined multiple band downlink, current interference value is minimum and symmetry thereof.
6. the method according to any one of Claims 1-4, is characterized in that, described multiple frequency range is multiple uplink and downlink frequency ranges of predefined symmetry in unauthorized frequency range,
Respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to multiple uplink band predefined in unauthorized frequency range and predefined multiple band downlink, obtains multiple current interference value;
From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: the uplink and downlink frequency range selecting the symmetry that average interference value is minimum in multiple uplink and downlink frequency ranges of described pre-defined symmetry, wherein, described average interference value is the mean value of the current interference value that current interference value that in described multiple uplink and downlink frequency range, uplink band is corresponding is corresponding with the band downlink of its symmetry.
7. the method according to any one of Claims 1-4, is characterized in that, described multiple frequency range is predefined asymmetrical multiple uplink band and multiple band downlink in unauthorized frequency range,
Respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: respectively Interference Detection is carried out to predefined multiple uplink band described in unauthorized frequency range and described predefined multiple band downlink, obtains multiple current interference value;
From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: the band downlink that current interference value corresponding in the uplink band selecting in described predefined multiple uplink band corresponding current interference value minimum and described predefined multiple band downlink is minimum.
8. the method according to any one of Claims 1-4, is characterized in that, described multiple frequency range is asymmetrical frequency range,
Respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: from multiple frequency range, determine that all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; Uplink interference detection is carried out to all uplink bands in described all uplink and downlink frequency range combinations, obtains and described all uplink bands multiple current uplink interference value one to one; Descending Interference Detection is carried out to all band downlinks in described all uplink and downlink frequency range combinations; Obtain and described all band downlinks multiple current downlink interference value one to one;
From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: the uplink and downlink frequency range combination selecting average interference value minimum from the uplink and downlink frequency range combination determined, wherein, described average interference value for described in the mean value of the current downlink interference value that current uplink interference value corresponding to uplink band is corresponding with band downlink in the uplink and downlink frequency range combination determined.
9. the method according to any one of Claims 1-4, is characterized in that, described multiple frequency range is asymmetrical frequency range,
Respectively Interference Detection is carried out to multiple frequency range predefined in unauthorized frequency range, obtain with described multiple frequency range one to one multiple current interference value comprise: from multiple frequency range, determine that all uplink and downlink frequency ranges combine according to the Duplex Spacing frequency pre-set; Uplink interference detection is carried out to all uplink bands in described all uplink and downlink frequency range combinations, obtains and described all uplink bands multiple current uplink interference value one to one; Descending Interference Detection is carried out to all band downlinks in described all uplink and downlink frequency range combinations; Obtain and described all band downlinks multiple current downlink interference value one to one;
From described multiple frequency range, the uplink band for adopting frequency division duplex mode to carry out communicating and band downlink is selected to comprise according to described multiple current interference value: to select current uplink interference corresponding to uplink band to be worth minimum uplink and downlink frequency range combination from the uplink and downlink frequency range combination determined, or, from the uplink and downlink frequency range combination that the current downlink interference value that the uplink and downlink frequency range combination selection band downlink determined is corresponding is minimum.
10. a communication frequency choice device, is characterized in that, comprising:
First detecting unit, for carrying out Interference Detection respectively to multiple frequency range predefined in unauthorized frequency range, obtains and described multiple frequency range multiple current interference value one to one; And
Selected cell, for selecting uplink band for adopting frequency division duplex mode to carry out communicating and band downlink from described multiple frequency range according to described multiple current interference value.
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