CN103281788B - Based on the up-link interference coordination method of D2D communication in multi-operator network system - Google Patents

Based on the up-link interference coordination method of D2D communication in multi-operator network system Download PDF

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CN103281788B
CN103281788B CN201310182960.XA CN201310182960A CN103281788B CN 103281788 B CN103281788 B CN 103281788B CN 201310182960 A CN201310182960 A CN 201310182960A CN 103281788 B CN103281788 B CN 103281788B
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operator
bs
d2due
interference
measurement
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CN103281788A (en
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彭涛
漆渊
刘子扬
杨煜丰
王文博
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北京邮电大学
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Abstract

Is operating procedure as follows: (1) D2D based on a up-link interference coordination method for D2D communication in multi-operator network system? UE exchanges the relevant information disturbed between respective operator, and makes the decision-making whether existing and disturb between potential operator; (2) base station BS analyzes interfere information between its potential operator received, and whether decision-making carries out uplink measurement; (3) BS identifies the honeycomb UE that to there is between serious operator interference and be subject to severe jamming, shows that the network design of non-coordinating problem occurs; (4) by Resourse Distribute or the operation maintenance center O & amp of BS; M carries out interference coordination.The invention provides a kind of by strong interferers between D2D communication identification operator and the method being disturbed terminal, and via base station or O & amp; M process, the configuration of coordinate network resources, can reduce or eliminate between operator and disturb, thus solves the insurmountable problem of employing ACIR limit interferences.

Description

Based on the up-link interference coordination method of D2D communication in multi-operator network system

Technical field

The present invention relates to a kind of support terminal and lead directly to the communication means of D2D (Device-to-device) communication in multi-operator network system, exactly, relate to the up-link interference coordination method based on D2D communication in a kind of multi-operator network system, belong to the technical field of radio communication.

Background technology

In the same area, usually there is the network of the different framework of multiple operator deployment, select corresponding communication service to provide user.Terminal in network communicates by two kinds of different patterns: cellular communication modes and D2D communication pattern.Under cellular communication modes, terminal is by base station BS (BaseSation) and another telex network.And under D2D communication pattern, terminal directly and another terminal communication and without center-control.The main advantage of honeycomb mode communication is: there is center-control, is easy to control Resourse Distribute and interference.But the remarkable defect of this pattern is: cannot Gains resources configuration information completely; The particularly resource allocation information of other operator, cause producing interference mutually between operator, and resource utilization is lower.

In order to realize higher throughput, in the network system of multi-operator, application comprises the Hybrid communication model of honeycomb and D2D pattern.In this scenario, each terminal can select a kind of communication pattern where necessary.In the application system that non-coordinating multi-operator shown in Figure 1 is network coexisted, its key is Resourse Distribute and interference coordination schemes.The present invention provides a kind of interference coordination schemes in multi-operator network system.

Relevant prior art has many kinds, the first technical scheme is: in third generation partner program 3GPP (The3rdGenerationPartnershipProject) standard criterion 36.101, and adjacentchannel selectivity ACS (Adjacentchannelselectivity) is used as weighing receiver to the rejection ability of neighboring trace signal.Base station should meet the minimum requirement of ACS when uplink receiving.

In 3GPP standard criterion 36.104, Adjacent Channel Leakage Ratio ACLR (AdjacentChannelLeakageRatio) is used as the Power leakage limiting transmitting terminal.No matter transmitting terminal why type, all must meet minimum ACLR requirement.For up link, can think that monkey chatter is determined by the ACLR of user than ACIR (AdjacentChannelInterferenceRatio).

In 3GPP standard criterion 36.942, provide the application scenarios of this kind of non-coordinating multi-operator, and corresponding simulation result is provided.When the network system being operated in adjacent channel produces interference, for weigh be disturbed network system hydraulic performance decline index respectively: the capacity loss of Global land wireless access UTRA (UniversalTerrestrialRadioAccess) system, and the throughput loss of the Global land wireless access system E-UTRA (EvolvedUniversalTerrestrialRadioAccess) of evolution, both all should depend on ACIR.Can find from simulation result: ACIR performance in this type of performance loss of suppression is good in some scenarios.

But, when UTRA network is interfered, can be observed obvious capacity loss.In addition, the simulation result in standard 36.942 is based on macrocellular network; And in multi-operator network application scene, often adopt hierarchical network.When another operator deployment microcellulor network (or Pico cell, femtocell network), the difference of path loss makes the signal transmitting power of interference user much larger than the power being disturbed user, even if adopt ACIR, throughput loss also can be larger.Therefore ACIR is solving in the interference problem between such operator, is not effective technical scheme.

The second technical scheme is: in wireless network, data packet dispatching mechanism is the strategy based on interference randomization.But scheduling of resource decision-making depends on long mean receiving power, and the interference between operator may occur suddenly in the moment being dispatched to user equipment (UE) (UserEquipment).Therefore, long mean receiving power cannot be caught between instantaneous operator and be disturbed, and will cause the scheduling of resource of poor efficiency.

In addition, the strategy of data packet dispatching mechanism is by specifying a series of pseudo-random permutation for subcarrier rule by the Data expansion of user in whole bandwidth, by interference randomization.After strong jamming when between operator comes across and is disturbed frequency range a period of time, a part is disturbed frequency range and is seriously unsuitable for user's transmission because it is disturbed.Therefore interference randomization cannot be realized by transmitting user data on the subcarrier of dispersion.

The third technical scheme is: can use larger protection bandwidth, but this obviously will reduce the availability of frequency spectrum.

Therefore, in the system scenarios that non-coordinating multi-operator is network coexisted, because different operators independently disposes base station in the same area, be difficult to the working band obtaining other operator base station, and the resource allocation information of its user.Under worst case, the base station of a certain operator is positioned at edge that another carrier network covers (as shown in Figure 2, BS1 and BS2 be under the jurisdiction of different operators respectively) wherein.

See Fig. 3, consider that the frequency resource that operator 1 and operator 2 take is adjoining.If UE1 is positioned at the covering edge of BS1, and the resource of the ascending resource of UE2 and UE1 adjacent (as shown in Figure 3), the upward signal of UE2 is by the interference between being subject to from the operator of UE1 upward signal.Now, it is relevant with the ACS of ACLR and BS2 of UE1 from the upward signal of UE1 that BS2 receives, and now monkey chatter than the computing formula of ACLR is:

The signal transmitting power of UE2 uplink received power and UE2, the path loss of UE2 to BS2 are relevant.Because UE1 is positioned at the covering edge of BS1, the interference that UE2 upward signal is subject to is relevant with the ACS of the transmission signal power of UE1, ACLR and BS2 of UE1.When operator deployment hierarchical network, can be observed to disturb between obvious operator, when especially when operator 1 deploys macrocellular, operator 2 deploys microcellulor.

On the other hand, because UE1 is under the jurisdiction of the resource allocation information that operator 1, UE2 and BS2 may not know UE1.When BS2 finds that UE2 upward signal is subject to severe jamming, it cannot distinguish interference source (may be derived from UE1 upward signal).Therefore BS2 cannot realize efficient resource configuration.

Summary of the invention

In view of this, the object of this invention is to provide in a kind of multi-operator network system based on D2D communication up-link interference coordination method, namely by strong interferers between D2D communication identification operator and the method being disturbed terminal, the method is by base station or O & M process, the configuration of coordinate network resources, can reduce or eliminate between operator and disturb, thus solve the insurmountable various problem of employing ACIR limit interferences or the defect of prior art existence.

In order to achieve the above object, the invention provides the up-link interference coordination method based on D2D communication in a kind of multi-operator network system, it is characterized in that, described method comprises following operative step:

(1) D2DUE exchanges the relevant information disturbed between respective operator, and makes the decision-making whether existing and disturb between potential operator;

(2) base station BS analyzes interfere information between its potential operator received, and whether decision-making carries out uplink measurement; This step (2) comprises following operative step:

(21) BS is after the information obtaining comprising the network ID of other UE, bandwidth sum centre frequency between the potential operator of the D2DUE report received interfere information, interference source between operator is classified and analyzes, obtain comprising the ratio of its received power with interference, the information reporting number of times, report the D2DUE number disturbed between identical operator of D2DUE, to know the expense of seriousness and the assessment measurement disturbed between this operator, thus determine whether do further measurement; If measure, then perform subsequent step (22); Otherwise, terminate the method all operations flow process;

(22) BS selects to adopt one of following two kinds of modes to complete the measurement disturbed between operator: BS carries out out-hole run or measured by the D2DUE being operated in authorized frequency bands; Wherein, the uplink measurement of BS is compulsory, and the measurement of the up link of D2DUE is optional; And in order to determine the honeycomb UE disturbing between operator and be disturbed, determine by protocol definition or by BS the measurement index at least comprising received power;

Due to after fast Fourier transform FFT, 2048 subcarriers only have 1320 for receiving uplink signal, therefore BS is by measuring the received power on its guard band, whether infer to exist between serious operator and disturb, namely BS is as the measurement result on interference band using the received power on other subcarrier of its frequency band; Meanwhile, this BS also knows which honeycomb UE is adjacent bandwidth assignment give, and this honeycomb UE is in the received power of this BS;

(23) if D2DUE can carry out D2D communication by use authority frequency band, then this D2DUE carries out uplink measurement simultaneously

(3) BS identifies the honeycomb UE that to there is between serious operator interference and be subject to severe jamming, shows that the network design of non-coordinating problem occurs;

(4) interference coordination is carried out by the resource distribution of BS or operation maintenance center O & M (OperationandMaintenance); In this step, when BS adopts resource distribution to carry out universal time coordinated to interference, it uses dynamic resource, distributes the frequency spectrum resource block RB away from interference band to the honeycomb UE by severe jamming; Or the honeycomb UE by severe jamming is dispatched on other subcarrier away from interference band or channel, but now operator should have many subcarriers or channel.

Compared with prior art, the advantage of the inventive method and effect are:

The present invention proposes a kind of by strong interferers between D2D communication identification operator and the method being disturbed terminal, and by base station or O & M process, coordinate resource distribution, can reduce or eliminate between operator and disturb, thus solve the insurmountable problem of employing ACIR limit interferences.

The method that the present invention is based on interference coordination can avoid strong jamming between operator, and is to solve this type of interference problem by the method for data packet dispatching.In addition, the present invention adopts self-optimizing algorithm to be applicable to network design flexibly, is therefore unified with the Natural circulation~+ direction of mobile network optimization.

Moreover the inventive method operating procedure simply, easily realizes; If select technical solution of the present invention, operator, without the need to adopting complicated method, can obtain the relevant information of network design; Good Consumer's Experience can also be provided, thus avoid a large amount of customer complaints.Therefore, the present invention has good popularizing application prospect.

Accompanying drawing explanation

Fig. 1 is the application scenarios schematic diagram that non-coordinating multi-operator network system coexists.

Fig. 2 is that non-coordinating multi-operator network system disposes configuration diagram.

Fig. 3 is UE1 and the UE2 upstream frequency Resourse Distribute schematic diagram in Fig. 2.

Fig. 4 is the up-link interference coordination method operating procedure flow chart based on D2D communication in multi-operator network system of the present invention.

Fig. 5 is the schematic diagram that UE carries out D2D communication.

Fig. 6 is that D2DUE exchanges interfere information and the operating procedure flow chart made a policy between operator.

Fig. 7 is the one possibility mode schematic diagram that BS carries out uplink measurement.

Fig. 8 is base station resource allocation, with the embodiment schematic diagram avoided interference.

Fig. 9 is the schematic diagram of signaling flow and main operational steps.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with drawings and Examples, the present invention is described in further detail.

Technical scheme of the present invention is not only applicable to E-UTRA system, is applicable to the problem disturbed between UTRA or GSM network process operator yet.Although when inventive point is described, the example of employing is macrocellular, the method also can expand in hierarchical network.

The basis of the inventive method is that D2DUE can adopt white empty frequency range, industry, science, medical science ISM (IndustrialScientificMedical) frequency range or other unauthorized frequency range to set up communication link, to exchange interfere information.In addition, D2DUE can communicate with its BS.

See Fig. 4, introduce the following concrete operation step (Fig. 9 is signaling flow and the main operational steps sequential chart of the inventive method) based on the up-link interference coordination method of D2D communication in multi-operator network system of the present invention:

Step 1, D2DUE exchanges the relevant information disturbed between respective operator, and makes the decision-making whether existing and disturb between potential operator.This step comprises following content of operation (shown in Figure 5):

(11) D2DUE adopts white D2D communication that is empty or other frequency ranges to exchange the relevant information disturbed between operator.

Set up D2D see Fig. 6, UE1 with contiguous UE2 to communicate, this UE1 and UE2 belong to respectively BS1 (belonging to operator 1) and BS2 (belonging to operator 2), UE2 can and UE1 exchange operator between the information disturbed.

It is to be noted that the communication link of D2DUE just may exist before interference coordination, now, can exchange by this communication link the relevant information disturbed between operator.If there is no the communication link of D2DUE, but need the relevant information disturbed between operator, then can set up special D2D link.

In order to help the interference between D2DUE analysis operator, definition that the information of exchange is pre-defined by agreement or D2DUE holds consultation, comprises plurality of kinds of contents and form; Its content at least comprises: the transmission signal power that centre frequency and bandwidth, the D2DUE of the distinctive network identification mark ID of operator (Identity), working frequency range communicate with BS under honeycomb mode and/or received signal power.List a kind of example below:

The format sample of interference-related information between table 1 operator

Wherein, P tX_1the transmitted power of UE1 to BS1, P rX_1refer to the downlink reception power of UE1.Attention: transmitted power and/or received power can help UE and BS to derive the uplink received power of BS.

(12) D2DUE decision-making judges whether its adjacent frequency band to exist between potential operator and disturbs.This step comprises following content of operation:

(12A) after D2DUE receives the relevant information disturbed between operator, network ID (operator is distinctive) and working band information is first extracted, to judge to determine whether another D2DUE belongs to other operators and work in nearby frequency bands; If so, then order performs step (12B); Otherwise redirect performs step (12C).

(12B) this D2DUE starts to analyze between potential operator and disturbs: because this D2DUE does not know whether the uplink transmission power of the honeycomb UE of another operator can produce severe jamming to the honeycomb UE of nearby frequency bands; Therefore the transmission signal power that communicates with BS of this D2DUE transmission signal power that first it will be communicated with BS and/or received signal power and the other side and/or received signal power utilize the decision rule of following formula: compare, disturb to judge whether to exist between potential operator; And during special circumstances under honeycomb mode, disturb between the operator that this D2DUE may be subject to and the D2DUE of its direct communication brings;

In formula, P tX_2and P tX_1be respectively the Liang Ge operator transmitted power that communicates with its BS of user UE2 with UE1 separately, α 2and α 1for UE2 and UE1 divides the transmission path loss being clipped to BS2, λ is threshold value; Because two UE are at a distance of comparatively near, therefore to simplify the analysis, suppose α 1≈ α 2; α 1p tX_1interference when/ACIR is BS2 reception upward signal, its numerical value depends on the power leakage of adjacent channel UE1 and the adjacentchannel selectivity ACS (Adjacentchannelselectivity) of BS2; The left side of inequality is the ratio that UE2 and UE1 divides the received power being clipped to BS2.

If this ratio is greater than threshold value λ, then UE2 judges to exist between potential operator to disturb, and redirect performs step (13); Otherwise namely this ratio is not more than threshold value λ, then UE2 judges not exist between potential operator to disturb, and performs subsequent step (12C).

Attention: threshold value λ is BS when receiving upward signal from UE, interference value between the operator that can tolerate.The numerical value of this threshold value is broadcasted by BS and is issued or determined in advance by agreement.

Because received power has reacted the path loss of UE to its BS, therefore the downlink reception power that the decision rule in this step (12B) also can expand to by calculating UE and base station communication calculates its transmitted power, disturbs for judging whether to exist between potential operator.

(12C) this D2DUE ignores this information, terminates the method all operations flow process.

(13) D2DUE reports the relevant information disturbed between potential operator to BS, comprise: the network ID (operator is distinctive) of UE, the potential transmission signal power that interference band information comprises bandwidth sum centre frequency, UE and the BS of other operator communicates and/or received signal power, for BS analysis decision, determine whether to need to carry out out-hole run.

D2DUE reports interfere information form between potential operator to have multiple to BS, and here is an example.

A kind of format sample of interfere information between the operator that table 2 is potential

Wherein, P tX_1/ ACIR is the interference of the UE1 that BS2 uplink receiving signal is subject to, P tX_2it is the transmitted power that UE2 arrives its BS.

Step 2, base station BS analyzes interfere information between its potential operator received, and whether decision-making carries out uplink measurement.This step comprises following content of operation:

(21) BS is after the information obtaining comprising the network ID of other UE, bandwidth sum centre frequency between the potential operator of the D2DUE report received interfere information (the interference band relevant information as above shown in table 2), interference source between operator is classified and analyzes, obtain comprising the ratio of its received power with interference, the information reporting number of times, report the D2DUE number disturbed between identical operator of D2DUE, to know the expense of seriousness and the assessment measurement disturbed between this operator, thus determine whether do further measurement; If measure, then perform subsequent step (22); Otherwise, terminate the method all operations flow process.

The seriousness of interference can have multiple metric form: such as: the ratio of the received power shown in formula in this step (12B) and interference, D2DUE report number of times, report D2DUE number of disturbing between identical operator etc.BS can set up the various measurement numerical value of charting as shown in table 3 below, then knows the seriousness of interference by the different tolerance of balance.

Table 3 records a kind of format sample of interference-related information between operator

Wherein, p tX_op2_1, p tX_op2_2, p tX_op2_3the transmitted power that UE1, UE2, UE3 of being respectively operator 2 communicate with its BS, be respectively the interference of UE1, UE2 and UE3 from operator 1 that BS2 upward signal receives, UE1 op2, UE2 op2, UE3 op2for the ID of UE1, UE2, UE3 of operator 2.

(22) BS selects to adopt one of following two kinds of modes to complete the measurement disturbed between operator: BS carries out out-hole run or measured by the D2DUE being operated in authorized frequency bands; Wherein, the uplink measurement of BS is compulsory, and the measurement of the up link of D2DUE is optional; And necessity, two kinds of metering systems can all adopt.In order to determine the honeycomb UE disturbing between operator and be disturbed, determine by protocol definition or by BS the measurement index at least comprising received power.

Due to after fast Fourier transform FFT (FastFourierTransform), 2048 subcarriers only have 1320 for receiving uplink signal, therefore BS is by measuring the received power on its guard band, whether infer to exist between serious operator and disturb (as shown below), namely BS is as the measurement result on interference band using the received power on other subcarrier of its frequency band; Meanwhile, this BS easily can also know which honeycomb UE is adjacent bandwidth assignment give, and this honeycomb UE is in the received power of this BS.Therefore BS can obtain measurement result as shown in table 4 below.

A kind of format sample of table 4 measurement result

In formula, B w1, B w3for the bandwidth of operator 1,3 potential interference frequency band, f c1, f c3for the centre frequency of operator 1,3 potential interference frequency band, P rX_b1, P rX_b3for the received power that BS measures on guard band, P rX_UE5op2, P rX_UE9op2for BS is being disturbed the uplink received power of UE5, UE9 of the operator 2 that frequency band is measured, UE5 op2, UE9 op2for the ID of UE5, UE9 that operator 2 may be disturbed.

Between the operator that in this step (22), two kinds of modes are measured, the measurement result of interference, i.e. D2DUE and the measurement result of BS may be inconsistent, and therefore, the uplink measurement of D2DUE is optional, only as the decision references of BS; And the measurement of BS is compulsory.In addition, for promoting to adopt resource distribution to carry out interference coordination, setting measurement duration is answered in the measurement of up link, disturbs can be confirmed whether to exist between operator.

In addition, if required, the BS in this step (22) comprehensively adopts this two kinds of metering systems: first carry out rough measure by D2DUE, after BS receives the measurement report of this D2DUE, more accurately measure.

(23) if D2DUE can carry out D2D communication by use authority frequency band, then this D2DUE carries out uplink measurement simultaneously.This step comprises following content of operation:

(23A) request is measured: the measurement solicited message that D2DUE is sent by broadcast or dedicated channel according to BS carries out uplink measurement; This metrical information at least comprises: the potential interference frequency band that needs are measured, the measurement parameter measuring duration and measurement index (such as received power).

(23B) uplink measurement: after D2DUE receives metrical information, is switched to potential interference band, and measures each measurement parameter of up link according to measurement request.

(23C) report measurement results: D2DUE via dedicated channel by measurement report to BS, this measurement result comprise each interference band and on the relevant information of received power, determine the honeycomb UE be disturbed for assisting BS.

If need to measure multiple frequency band, measurement result should comprise the information relevant to each frequency band.The possible form of report measurement results can reference table 4.Measurement result also can be sent to BS via dedicated channel.

Step 3, there is interference between serious operator and be subject to the honeycomb UE of severe jamming in BS once identify, shows that the network design of non-coordinating problem occurs.At this moment, BS not only wants measurements interference, also wants continuous surveillance to disturb.This stepwise derivation monitoring will contribute to catching between operator to be disturbed, and implements follow-up interference coordination.This step comprises following content of operation:

(31), after BS obtains out-hole run result, extract the relevant information of interference band, then according to different interference sources, measurement result is sorted out; Meanwhile, the honeycomb UE being positioned at the working band edge adjacent with interference band and received power thereof is known.

(32) BS to identify between serious operator for each interference band according to decision rule and disturbs, and distinguish the honeycomb UE disturbed: if the ratio of the uplink received power of honeycomb UE on oneself frequency band and the received power of BS in nearby frequency bands is greater than setting threshold, just judge to exist between operator to disturb, and the UE that this honeycomb UE is subjected to interference between serious operator and becomes by severe jamming.

(33) for two kinds of modes of BS and D2DUE out-hole run in step (22), adopting following two kinds of corresponding decision rules, disturbing for judging whether to exist between operator:

(A), when D2DUE performs uplink measurement, employing formula is: decision rule judge, if this inequality is set up, then BS judges to exist between operator and disturb, and this honeycomb UE suffers to disturb between serious operator; In formula, P rX_afor the BS that is disturbed is at the uplink received power of interference band, ACIR is the monkey chatter ratio being disturbed BS, P rX_a/ ACIR is interference value between the operator that is subjected to of the honeycomb UE be disturbed, P rX_bfor the honeycomb UE extended receiver power be disturbed, γ is the interference threshold that can bear based on the BS arranged during D2DUE uplink measurement;

(B), when BS performs uplink measurement, employing formula is: decision rule judge, if this inequality set up, then BS judges that corresponding D2DUE suffers to disturb between serious operator; In formula, P rX_1be the received power that BS measures on the guard band be disturbed, γ ' is the interference threshold that can bear based on the BS arranged during BS out-hole run, and γ 'different with γ value, the former is more accurate.

Step 4, after BS identifies the honeycomb UE be disturbed, adopts two kinds of interference coordination mechanism: carry out interference coordination by the Resourse Distribute of BS or operation maintenance center O & M (OperationandMaintenance).

If BS adopts resource distribution to carry out universal time coordinated to interference, it uses dynamic resource, distributes the frequency spectrum resource block RB (ResourceBlock) away from interference band to the honeycomb UE by severe jamming; Or the honeycomb UE by severe jamming is dispatched on other subcarrier away from interference band or channel, but now operator should have many subcarriers or channel.

If BS adopts O & M, mode carries out universal time coordinated to interference, BS first sends to O & M the request of coordination, and the following relevant information disturbed between operator is described in this coordination request: interference source, i.e. interference band, interference level or annoyance level, the inequality ratio namely in step (33).The form of the coordination request sent can have multiple.Following table 5 is a kind of examples.O & M, according to the information received, judges whether the coordination that must perform resource distribution, if so, the then sub-carrier frequencies of BS of O & M by reconfiguring or adjust another and being disturbed, to avoid disturbing between operator; Or by O & M and other operator negotiation resource allocation proposal.

A kind of format sample of request coordinated by table 5

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (9)

1. in multi-operator network system based on D2D communication a up-link interference coordination method, it is characterized in that, described method comprises following operative step:
(1) D2DUE exchanges the relevant information disturbed between respective operator, and makes the decision-making whether existing and disturb between potential operator;
(2) base station BS analyzes interfere information between its potential operator received, and whether decision-making carries out uplink measurement; This step (2) comprises following operative step:
(21) BS is after the information obtaining comprising the network ID of other UE, bandwidth sum centre frequency between the potential operator of the D2DUE report received interfere information, interference source between operator is classified and analyzes, obtain comprising the ratio of its received power with interference, the information reporting number of times, report the D2DUE number disturbed between identical operator of D2DUE, to know the expense of seriousness and the assessment measurement disturbed between this operator, thus determine whether do further measurement; If measure, then perform subsequent step (22); Otherwise, terminate the method all operations flow process;
(22) BS selects to adopt one of following two kinds of modes to complete the measurement disturbed between operator: BS carries out out-hole run or measured by the D2DUE being operated in authorized frequency bands; Wherein, the uplink measurement of BS is compulsory, and the measurement of the up link of D2DUE is optional; And in order to determine the honeycomb UE disturbing between operator and be disturbed, determine by protocol definition or by BS the measurement index at least comprising received power;
Due to after fast Fourier transform FFT, 2048 subcarriers only have 1320 for receiving uplink signal, therefore BS is by measuring the received power on its guard band, whether infer to exist between serious operator and disturb, namely BS is as the measurement result on interference band using the received power on other subcarrier of its frequency band; Meanwhile, this BS also knows which honeycomb UE is adjacent bandwidth assignment give, and this honeycomb UE is in the received power of this BS;
(23) if D2DUE can carry out D2D communication by use authority frequency band, then this D2DUE carries out uplink measurement simultaneously
(3) BS identifies the honeycomb UE that to there is between serious operator interference and be subject to severe jamming, shows that the network design of non-coordinating problem occurs;
(4) interference coordination is carried out by the resource distribution of BS or operation maintenance center O & M; In this step, when BS adopts resource distribution to carry out universal time coordinated to interference, it uses dynamic resource, distributes the frequency spectrum resource block RB away from interference band to the honeycomb UE by severe jamming; Or the honeycomb UE by severe jamming is dispatched on other subcarrier away from interference band or channel, but now operator should have many subcarriers or channel.
2. method according to claim 1, is characterized in that, described step (1) comprises following operative step:
(11) D2DUE adopts the D2D of white empty frequency range or other frequency ranges communication to exchange the relevant information disturbed between operator; And the information of this exchange is pre-defined by agreement or D2DUE holds consultation definition, comprise plurality of kinds of contents and form; Its content at least comprises: the transmission signal power that centre frequency and bandwidth, the D2DUE of the distinctive network identification mark ID of operator, working frequency range communicate with BS under honeycomb mode and/or received signal power;
(12) D2DUE decision-making judges whether its adjacent frequency band to exist between potential operator and disturbs;
(13) D2DUE reports the relevant information disturbed between potential operator to BS, for BS analysis decision, determines whether to need to carry out out-hole run.
3. method according to claim 2, is characterized in that, described step (12) comprises following operative step:
(12A), after D2DUE receives the relevant information disturbed between operator, first network ID and working band information is extracted, to judge to determine whether another D2DUE belongs to other operators and work in nearby frequency bands; If so, then order performs step (12B); Otherwise redirect performs step (12C);
(12B) this D2DUE starts to analyze between potential operator and disturbs: because this D2DUE does not know whether the uplink transmission power of the honeycomb UE of another operator can produce severe jamming to the honeycomb UE of nearby frequency bands; Therefore the transmission signal power that communicates with BS of this D2DUE transmission signal power that first it will be communicated with BS and/or received signal power and the other side and/or received signal power utilize the decision rule of following formula: compare, disturb to judge whether to exist between potential operator; And during special circumstances under honeycomb mode, disturb between the operator that this D2DUE may be subject to and the D2DUE of its direct communication brings;
In formula, UE1 sets up D2D with contiguous UE2 and communicates, and this UE1 and UE2 belongs to BS1 and BS2 respectively, and wherein BS1 belongs to operator 1, BS2 and belongs to operator 2; P tX_2and P tX_1be respectively the Liang Ge operator transmitted power that communicates with its BS of user UE2 with UE1 separately, α 2and α 1for UE2 and UE1 divides the transmission path loss being clipped to BS2, λ is threshold value; Because two UE are at a distance of comparatively near, therefore to simplify the analysis, suppose α 1 ≈α 2; α 1p tX_1interference when/ACIR is BS2 reception upward signal, its numerical value depends on the power leakage of adjacent channel UE1 and the adjacentchannel selectivity ACS of BS2; The left side of inequality is the ratio that UE2 and UE1 divides the received power being clipped to BS2;
If decision rule ratio be greater than threshold value λ, then UE2 judges to exist between potential operator and disturb, and redirect performs step (13); Otherwise, i.e. decision rule ratio be not more than threshold value λ, then UE2 judges do not exist between potential operator and disturb, and performs subsequent step (12C);
(12C) this D2DUE ignores this information, terminates the method all operations flow process.
4. method according to claim 3, it is characterized in that: because received power has reacted the path loss of UE to its BS, therefore the downlink reception power that the decision rule in step (12B) also can expand to by calculating UE and base station communication calculates its transmitted power, disturbs for judging whether to exist between potential operator.
5. method according to claim 1, is characterized in that, in described step (22), if required, BS comprehensively adopts described two kinds of metering systems: first carry out rough measure by D2DUE, after BS receives the measurement report of this D2DUE, more accurately measure.
6. method according to claim 1, is characterized in that, described step (23) comprises following operative step:
(23A) metrical information that D2DUE is sent by broadcast or dedicated channel according to BS carries out uplink measurement; This metrical information comprises: the measurement parameter of the potential interference frequency band that measure, measurement duration and received power;
(23B) after D2DUE receives metrical information, be switched to potential interference band, and according to measurement request, each measurement parameter of up link measured;
(23C) D2DUE via dedicated channel by measurement report to BS, this measurement result comprise each interference band and on the relevant information of received power, determine the honeycomb UE be disturbed for assisting BS.
7. method according to claim 5, it is characterized in that: between the operator that in described step (22), two kinds of modes are measured, the measurement result of interference, i.e. D2DUE and the measurement result of BS may be inconsistent, therefore the uplink measurement of D2DUE is optional, only as the decision references of BS; And the measurement of BS is compulsory; And adopting resource distribution to carry out interference coordination for promoting, setting measurement duration is answered in the measurement of up link, disturbs can be confirmed whether to exist between operator.
8. method according to claim 1, is characterized in that, described step (3) comprises following operative step:
(31), after BS obtains out-hole run result, extract the relevant information of interference band, then according to different interference sources, measurement result is sorted out; Meanwhile, the honeycomb UE being positioned at the working band edge adjacent with interference band and received power thereof is known;
(32) BS to identify between serious operator for each interference band according to decision rule and disturbs, and distinguish the honeycomb UE disturbed: if the ratio of the uplink received power of honeycomb UE on oneself frequency band and the received power of BS in nearby frequency bands is greater than setting threshold, just judge to exist between operator to disturb, and the UE that this honeycomb UE is subjected to interference between serious operator and becomes by severe jamming;
(33) for two kinds of modes of BS and D2DUE out-hole run in step (22), adopting following two kinds of corresponding decision rules, disturbing for judging whether to exist between operator:
(A), when D2DUE performs uplink measurement, employing formula is: decision rule judge, if decision rule inequality is set up, then BS judges to exist between operator to disturb, and this honeycomb UE suffers to disturb between serious operator; In formula, P rX_afor the BS that is disturbed is at the uplink received power of interference band, ACIR is the monkey chatter ratio being disturbed BS, P rX_a/ ACIR is interference value between the operator that is subjected to of the honeycomb UE be disturbed, P rX_bfor the honeycomb UE extended receiver power be disturbed, γ is the interference threshold that can bear based on the BS arranged during D2DUE uplink measurement;
(B), when BS performs uplink measurement, employing formula is: decision rule judge, if decision rule inequality is set up, then BS judges that corresponding D2DUE suffers to disturb between serious operator; In formula, P rX_1be the received power that BS measures on the guard band be disturbed, γ ' is the interference threshold that can bear based on the BS arranged during BS out-hole run, and γ ' is different with γ value, and γ ' is more accurate.
9. method according to claim 1, it is characterized in that, in described step (4), when BS adopts O & M mode to carry out universal time coordinated to interference, BS first sends to O & M the request of coordination, and the following information disturbed between operator is described in this coordination request: interference source, i.e. interference band, interference level or annoyance level, i.e. the inequality ratio of step (33); O & M, according to the information received, judges whether to perform the coordination of resource distribution, if so, the then sub-carrier frequencies of BS of O & M by reconfiguring or adjust another and being disturbed, to avoid disturbing between operator; Or by O & M and other operator negotiation resource allocation proposal.
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