CN103281788A - D2D (device to device) communication-based uplink interference coordination method in multi-operator network system - Google Patents
D2D (device to device) communication-based uplink interference coordination method in multi-operator network system Download PDFInfo
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Abstract
A D2D (device to device) communication-based uplink interference coordination method in a multi-operator network system comprises the operating steps that (1), D2D UEs exchange respective inter-operator related interference information and make a decision that whether inter-operator potential interference exists; (2) a base station (BS) analyzes the received potential inter-operator interference information and decides whether uplink measuring is performed; (3) BS identifies the existence of the severe inter-operator interference and the honeycomb UE subjected to severe interference, thus indicating that the uncoordinated network deployment has a fault; and (4) interference coordination is carried out by resource allocation of the BS or the O&M (operation and maintenance) of an operation maintenance center. The method provided by the invention identifies the inter-operator strong interference source and an interfered terminal by the D2D communication and processes the same by the base station or O&M to coordinate the allocation of network resource, thus reducing or eliminating the inter-operator interference and further solving the problem that the interference cannot be solved by ACIR (adjacent channel leakage ratio) limitation.
Description
Technical field
The present invention relates to the straight-through D2D(Device-to-device of a kind of support terminal) communication means of communication in the multi-operator network system, exactly, relate to the uplink interference coordination approach of communicating by letter based on D2D in a kind of multi-operator network system, belong to technical field of wireless communication.
Background technology
In the same area, there are a plurality of operators to dispose the network of different frameworks usually, so that being provided, the user selects corresponding communication service.Terminal in the network can communicate by two kinds of different patterns: cellular communication pattern and D2D communication pattern.Under the cellular communication pattern, terminal is by base station BS (BaseSation) and another telex network.And under the D2D communication pattern, terminal does not directly have central authorities and controls with another terminal communication.The main advantage of honeycomb mode communication is: have central authorities' control, be easy to control resource distribution and interference.Yet the remarkable defective of this pattern is: can't obtain resource allocation information fully; Particularly the resource allocation information of other operator cause producing the phase mutual interference between the operator, and resource utilization is lower.
In order to realize higher throughput, in the network system of multi-operator, use and to comprise honeycomb and D2D pattern in interior mixed communication pattern.In this scene, each terminal can be selected a kind of communication pattern where necessary.In the network coexisted application system of non-coordination multi-operator shown in Figure 1, its key is that resource is distributed and interference coordination schemes.The present invention provides a kind of interference coordination schemes in the multi-operator network system.
Relevant prior art has many kinds, first kind of technical scheme is: at third generation partner program 3GPP(The3rd Generation Partnership Project) in the standard criterion 36.101, adjacentchannel selectivity ACS(Adjacent channel selectivity) be used as and weigh receiver to the inhibition ability of neighboring trace signal.The minimum requirement of ACS should be satisfied in the base station when up the reception.
In 3GPP standard criterion 36.104, Adjacent Channel Leakage Ratio ACLR(Adjacent Channel Leakage Ratio) is used as the Power leakage that limits transmitting terminal.No matter why type transmitting terminal all must satisfy minimum ACLR requirement.For up link, can think that monkey chatter is than ACIR(Adjacent Channel Interference Ratio) be to be determined by user's ACLR.
In 3GPP standard criterion 36.942, provide the application scenarios of the non-coordination multi-operator of this class, and corresponding simulation result is provided.When the network system that is operated in adjacent channel produces interference, being used for weighing the index of being disturbed the network system performance to descend is respectively: the capacity loss of system global land wireless access UTRA(Universal Terrestrial Radio Access), and the global land wireless access system E-UTRA(Evolved Universal Terrestrial Radio Access of evolution) throughput loss, both all depend on ACIR for this.Can find from simulation result: ACIR performance aspect this type of performance loss of inhibition is good under some scene.
Yet, when the UTRA network is interfered, can be observed tangible capacity loss.In addition, the simulation result in the standard 36.942 is based on macrocellular network; And in multi-operator network application scene, often adopt hierarchical network.When another operator disposed a microcellulor network (or Pico cell, femtocell network), the difference of path loss made the signal transmitting power of interference user much larger than the power that is subjected to interference user, even adopt ACIR, the throughput loss also can be bigger.Therefore ACIR is not to be effective technical scheme aspect the interference problem that solves between such operator.
Second kind of technical scheme is: data packet dispatching mechanism is based on the strategy of interference randomization in the wireless network.Yet the scheduling of resource decision-making depends on long mean receiving power, and the interference between operator may occur suddenly in the moment that is dispatched to user equipment (UE) (User Equipment).Therefore, mean receiving power can't be caught between instantaneous operator and be disturbed for a long time, will cause the scheduling of resource of poor efficiency.
In addition, the strategy of data packet dispatching mechanism is by stipulating that a series of pseudo-random permutation rules for subcarrier expand to user's data on the whole bandwidth, with interference randomization.Be subjected to interference band after a period of time when the strong jamming between operator comes across, a part is transmitted because it is subjected to serious interference to be unsuitable for the user by interference band.Therefore can't realize interference randomization by transmitting user data on the subcarrier that disperses.
The third technical scheme is: can use bigger protection bandwidth, but this will obviously reduce the availability of frequency spectrum.
Therefore, in the network coexisted system's scene of non-coordination multi-operator, because the different operator independent base station of disposing respectively in the same area, be difficult to obtain the working band of other operator base station, with and user's resource allocation information.Under the worst case, the base station of a certain operator is positioned at the edge (as shown in Figure 2, BS1 wherein is under the jurisdiction of different operators respectively with BS2) that another carrier network covers.
Referring to 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 will be subjected to from the interference between the operator of UE1 upward signal.At this moment, the ACS from the ACLR of the upward signal of UE1 and UE1 and BS2 that BS2 receives is relevant, and monkey chatter this moment than the computing formula of ACLR is:
The signal transmitting power of the up received power of UE2 and UE2, the path loss of UE2 to BS2 are relevant.Because UE1 is positioned at the covering edge of BS1, the ACS of the transmission signal power of the interference that the UE2 upward signal is subjected to and UE1, the ACLR of UE1 and BS2 is relevant.When operator disposes hierarchical network, can be observed between tangible operator and disturb, especially disposed macrocellular and operator 2 when having disposed microcellulor when operator 1.
On the other hand, because UE1 is under the jurisdiction of operator 1, UE2 and BS2 may not know the resource allocation information of UE1.When BS2 found that the UE2 upward signal is subjected to seriously disturbing, it can't distinguish interference source (may be derived from the UE1 upward signal).Therefore BS2 can't realize efficient resource distribution.
Summary of the invention
In view of this, the purpose of this invention is to provide in a kind of multi-operator network system based on the uplink interference coordination approach of D2D communication, namely by strong interferers between D2D communication identification operator be subjected to the method for interfered with terminal, this method is by base station or O﹠amp; M handles, and the configuration of coordinate network resources can reduce or eliminate between operator and disturb, thereby has solved the insurmountable variety of issue of employing ACIR limit interferences or defective that prior art exists.
In order to achieve the above object, the invention provides the uplink interference coordination approach of communicating by letter based on D2D in a kind of multi-operator network system, it is characterized in that described method comprises following operating procedure:
(1) relevant information of disturbing between D2D UE exchange operator separately, and make whether there is the decision-making of disturbing between potential operator;
(2) base station BS is analyzed interfere information between its potential operator that receives, and whether decision-making carries out uplink measurement;
(3) BS identifies and has the honeycomb UE that disturbs and be subjected to serious interference between serious operator, shows that problem has taken place the network design of non-coordination;
(4) resource distribution or the O﹠amp of operation maintenance center by BS; M(Operation and Maintenance) carries out interference coordination.
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 be subjected to the method for interfered with terminal, and by base station or O﹠amp; M handles, and coordinates resource distribution, can reduce or eliminate between operator and disturb, thereby solve the insurmountable problem of employing ACIR limit interferences.
The method that the present invention is based on interference coordination can be avoided 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 the self-optimizing algorithm to be applicable to the flexible net deployment, and therefore the natural evolution direction with mobile network optimization is unified.
Moreover, simple, the realization easily of the inventive method operating procedure; If select technical solution of the present invention for use, operator need not to adopt complicated method, can obtain the relevant information of network design; Can also provide good user to experience, thereby avoid a large amount of customer complaints.Therefore, the present invention has good popularization and application prospect.
Description of drawings
Fig. 1 is the application scenarios schematic diagram of non-coordination multi-operator network system coexistence.
Fig. 2 is that non-coordination multi-operator network system is disposed configuration diagram.
Fig. 3 is that UE1 and the UE2 upstream frequency resource among Fig. 2 distributed schematic diagram.
Fig. 4 is the uplink interference coordination approach operating procedure flow chart of communicating by letter based on D2D in the multi-operator network system of the present invention.
Fig. 5 is the schematic diagram that UE carries out D2D communication.
Fig. 6 is interfere information and the operating procedure flow chart that makes a policy between D2D UE exchange operator.
Fig. 7 is a kind of possibility mode schematic diagram that BS carries out uplink measurement.
Fig. 8 is the base station resource allocation, with the embodiment schematic diagram that avoids interference.
Fig. 9 is the schematic diagram of signaling flow and main operational steps.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and Examples.
Technical scheme of the present invention is not only applicable to the E-UTRA system, is applicable to the problem of disturbing between UTRA or GSM network processes operator yet.Although when the explanation inventive point, the example of employing is macrocellular,, this method also can expand in the hierarchical network.
The basis of the inventive method is that D2D UE can adopt white empty frequency range, industry, science, medical science ISM(Industrial Scientific Medical) frequency range or other unauthorized frequency range set up communication link, with the exchange interfere information.In addition, D2D UE can communicate by letter with its BS.
Referring to Fig. 4, introduce the following concrete operations step (Fig. 9 is signaling flow and the main operational steps sequential chart of the inventive method) of the uplink interference coordination approach of communicating by letter based on D2D in the multi-operator network system of the present invention:
Step 1, the relevant information of disturbing between D2D UE exchange operator separately, and make whether there is the decision-making of disturbing between potential operator.This step comprises following content of operation (referring to shown in Figure 5):
(11) D2D UE adopts white D2D communication empty or other frequency ranges to exchange the relevant information of disturbing between operator.
Referring to Fig. 6, UE1 sets up D2D with contiguous UE2 and communicates by letter, and this UE1 and UE2 belong to BS1(respectively and belong to operator 1) and BS2(belong to operator 2), UE2 can and UE1 exchange the information of disturbing between operator.
It should be noted that: the communication link of D2D UE may just exist before interference coordination, at this moment, and can be by the relevant information of disturbing between this communication link exchange operator.The if there is no communication link of D2D UE, but need the relevant information disturbed between operator, then can set up special D2D link.
In order to help D2D UE to analyze interference between operator, the information of exchange is the pre-defined or D2D UE definition of holding consultation by agreement, comprises plurality of kinds of contents and form; The distinctive network identification mark ID(Identity of operator), centre frequency and bandwidth, the D2D UE of working frequency range transmission signal power and/or the received signal power of communicating by letter with BS under honeycomb mode its content comprises at least:.List a kind of example below:
The format sample of interference-related information between table 1 operator
Wherein, P
TX_1Be that UE1 is to the transmitted power of BS1, P
RX_1Refer to the descending received power of UE1.Attention: transmitted power and/or received power can help UE and BS to derive the up received power of BS.
(12) whether D2D UE decision-making is judged to exist between potential operator on its adjacent frequency band and is disturbed.This step comprises following content of operation:
After (12A) D2D UE receives the relevant information of disturbing between operator, extract network ID (operator is distinctive) and working band information earlier, determine to judge whether another D2D UE belongs to other operators and work in nearby frequency bands; If, then the order execution in step (12B); Otherwise, redirect execution in step (12C).
(12B) this D2D UE begins to analyze between potential operator and disturbs: whether the uplink transmission power of not knowing the honeycomb UE of another operator because of this D2D UE can produce serious the interference to the honeycomb UE of nearby frequency bands; So decision rule that the transmission signal power that this D2D UE will communicate by letter it earlier with BS transmission signal power and/or received signal power and the other side communicate by letter with BS and/or received signal power utilize following formula:
Compare, disturb to judge whether to exist between potential operator; And during the special circumstances under honeycomb mode, disturb between the operator that this D2D UE may be subjected to and the D2D UE of its direct communication brings;
In the formula, P
TX_2And P
TX_1Be respectively two operators user UE2 and UE1 transmitted power of communicating by letter with its BS separately, α
2And α
1For UE2 and UE1 divide the transmission path loss that is clipped to BS2, λ is threshold value; Because so two UE to simplify the analysis, suppose α at a distance of nearer
1≈ α
2α
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(Adjacent channel selectivity of BS2); The left side of inequality is the ratio that UE2 and UE1 divide the received power that is clipped to BS2.
If this ratio is greater than threshold value λ, then UE2 judges to exist between potential operator and disturbs redirect execution in step (13); Otherwise namely this ratio is not more than threshold value λ, and then UE2 judges not exist between potential operator and disturbs, and carries out 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 issued by BS broadcasting or is determined in advance by agreement.
Because received power has been reacted the path loss of UE to its BS, so also expanding to by the descending received power of calculating UE and base station communication, the decision rule in this step (12B) calculates its transmitted power, disturb for judging whether to exist between potential operator.
(12C) this D2D UE ignores this information, finishes the whole operating processes of this method.
(13) D2D UE reports the relevant information of disturbing between potential operator to BS, comprise: the network ID of UE (operator is distinctive), potential interference band information comprise transmission signal power and/or the received signal power that the UE of bandwidth and centre frequency, other operator communicates by letter with BS, for the BS analysis decision, determine whether to carry out out-hole run.
It is multiple that D2D UE reports between potential operator the interfere information form to have to BS, is an example below.
A kind of format sample of interfere information between the potential operator of table 2
Wherein, P
TX_1ACIR is the interference of the UE1 that is subjected to of the up reception signal of BS2, P
TX_2It is the transmitted power that UE2 arrives its BS.
Step 2, base station BS are analyzed interfere information between its potential operator that receives, and whether decision-making carries out uplink measurement.This step comprises following content of operation:
(21) after BS obtains comprising the information of network ID, bandwidth and centre frequency of other UE the interfere information (the as above interference band relevant information shown in the table 2) between the potential operator of the D2D UE that receives report, interference source between operator is classified and analyzed, obtain comprising the reporting number of times, report the information of the D2D UE number that disturbs between identical operator of ratio, D2D UE of its received power and interference, with the expense of knowing that the seriousness disturbed between this operator and assessment are measured, thereby determine whether to do further measurement; If measure, then carry out subsequent step (22); Otherwise, finish the whole operating processes of this method.
The seriousness of disturbing can have multiple tolerance mode: for example: the ratio of the received power shown in the formula in this step (12B) and interference, D2D UE report number of times, report D2DUE number that disturbs between identical operator etc.BS can set up the various measurement numerical value of charting as shown in table 3 below, knows the seriousness of interference by weighing different tolerance again.
A kind of format sample of interference-related information between table 3 record operator
Wherein, P
TX_op2_1, P
TX_op2_2, P
TX_op2_3Be respectively UE1, the UE2 of operator 2, the transmitted power that UE3 communicates by letter with its BS,
Be respectively the UE1 from operator 1, UE2 that the BS2 upward signal receives and the interference of UE3, UE1
Op2, UE2
Op2, UE3
Op2Be UE1, the UE2 of operator 2, the ID of UE3.
(22) BS select to adopt one of following dual mode to finish the measurement of disturbing between operator: BS to carry out out-hole run or measured by the D2D UE that is operated in authorized frequency bands; Wherein, the uplink measurement of BS is compulsory, and the measurement of the up link of D2D UE is optional; And necessary, two kinds of metering systems can all adopt.For the honeycomb UE that determines to disturb and to be disturbed between operator, by protocol definition or determined to comprise at least the measurement index of received power by BS.
Because at fast Fourier transform FFT(Fast Fourier Transform) after, article 2048, have only 1320 to be used for the receiving uplink signal on the subcarrier, so BS is by measuring the received power on its protection frequency band, whether infer to exist and disturb (as shown below) between serious operator, namely BS is as the measurement result on the interference band with the received power on other subcarrier of its frequency band; Simultaneously, this BS can also know easily which honeycomb UE is adjacent bandwidth assignment given, 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 the formula, B
W1, B
W3Be the bandwidth of operator 1,3 potential interference bands, f
C1, f
C3Be the centre frequency of operator 1,3 potential interference bands, P
RX_b1, P
RX_b3Be the received power that BS measures at the protection frequency band, P
RX_UE5op2, P
RX_UE9op2Be the up received power of BS at UE5, the UE9 of the operator 2 that measured by interference band, UE5
Op2, UE9
Op2UE5, the ID of UE9 that may be disturbed for operator 2.
Disturb between the operator that dual mode is measured in this step (22), be that the measurement result of the measurement result of D2D UE and BS may be inconsistent, therefore, the uplink measurement of D2D UE 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, whether the setting measurement duration is answered in the measurement of up link, disturb in order to can confirm to exist between operator.
In addition, need, the BS in this step (22) comprehensively adopts this two kinds of metering systems: carry out rough measure by D2D UE earlier, BS accurately measures after receiving the measurement report of this D2D UE again.
(23) if D2D UE can carry out D2D communication by the use authority frequency band, then this D2D UE carries out uplink measurement simultaneously.This step comprises following content of operation:
(23A) measure request: D2D UE carries out uplink measurement according to the measurement solicited message that BS sends by broadcasting or dedicated channel; This metrical information comprises at least: the measurement parameter of the potential interference band that needs are measured, measurement duration and measurement index (for example received power).
(23B) uplink measurement: after D2D UE receives metrical information, switch to potential interference band, and according to the request of measuring each measurement parameter of up link is measured.
(23C) report measurement result: D2D UE via dedicated channel with measurement report give BS, this measurement result comprise each interference band and on the relevant information of received power, be used for assisting BS to determine the honeycomb UE that is disturbed.
Measure a plurality of frequency bands if desired, measurement result should comprise the information relevant with each frequency band.Reporting measurement result's possible form can reference table 4.Measurement result also can send to BS via dedicated channel.
Step 3, in a single day BS identifies and has the honeycomb UE that disturbs and be subjected to serious interference between serious operator, shows that problem has taken place the network design of non-coordination.At this moment, BS not only will measure interference, also will continue monitor interference.This continuous interference monitoring will help to catch between operator to disturb, and implement follow-up interference coordination.This step comprises following content of operation:
(31) after BS obtains the out-hole run result, extract the relevant information of interference band, according to different interference sources measurement result is sorted out again; Simultaneously, know honeycomb UE and the received power thereof that is positioned at the working band edge adjacent with interference band.
(32) BS identifies between serious operator at each interference band according to decision rule and disturbs, and distinguish the honeycomb UE that is disturbed: if honeycomb UE on own frequency band up received power and the ratio of the received power of BS on nearby frequency bands greater than setting threshold, just judge to exist between operator and disturb, and this honeycomb UE is subjected to interference between serious operator and becomes the UE that is subjected to serious interference.
(33) at the dual mode of BS in the step (22) and D2D UE out-hole run, adopt following two kinds of corresponding decision rules, be used for judging whether to exist between operator disturbing:
When (A) D2D UE carries out uplink measurement, adopt formula to be:
Decision rule make judgement, if this inequality sets up, then BS judges to exist between operator and disturbs, and this honeycomb UE suffers to disturb between serious operator; In the formula, P
RX_aBe the BS that the disturbed up received power at interference band, ACIR is the monkey chatter ratio that is disturbed BS, P
RX_aACIR is interference value between the operator that is subjected to of the honeycomb UE that disturbed, P
RX_bBe the honeycomb UE up link received power of being disturbed, the interference threshold that the BS that γ arranges when being based on D2D UE uplink measurement can bear;
When (B) BS carries out uplink measurement, adopt formula to be:
Decision rule judge that if this inequality is set up, then BS judges that corresponding D2D UE suffers to disturb between serious operator; In the formula, P
RX_1Be the received power that BS measures at the protection frequency band that is disturbed, the interference threshold that the BS that γ ' arranges when being based on the BS out-hole run can bear, and γ ' is different with the γ value, and the former is more accurate.
Step 4, after BS identifies the honeycomb UE that is disturbed, adopt two kinds of interference coordination mechanism: the resource by BS is distributed or the O﹠amp of operation maintenance center; M(Operation and Maintenance) carries out interference coordination.
Adopt resource distribution that universal time coordinated is carried out in interference as if BS, it is to use dynamic resource, gives to be subjected to the serious honeycomb UE distribution of disturbing away from the frequency spectrum resource piece RB(Resource Block of interference band); Be dispatched on other subcarrier or channel away from interference band by the serious honeycomb UE that disturbs, but this moment, operator should have many subcarriers or channel.
If BS adopts O﹠amp; The M mode is carried out universal time coordinated to interference, and BS is earlier to O﹠amp; M send to coordinate request, and describes the following relevant information of disturbing between operator in this coordinations is asked: interference source, be interference band, and interference level or annoyance level, i.e. inequality ratio in the step (33).The form of the coordination request that sends can have multiple.Following table 5 is a kind of examples.O﹠amp; M judges whether the essential coordination of carrying out resource distribution according to the information that receives, if, O﹠amp then; M is by reconfiguring or adjust the sub-carrier frequencies of another BS that is disturbed, disturbs between operator avoiding; Perhaps by O﹠amp; M and other operator consult resource allocation proposal.
Table 5 is coordinated a kind of format sample of request
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (11)
- In the multi-operator network system based on the uplink interference coordination approach of D2D communication, it is characterized in that described method comprises following operating procedure:(1) relevant information of disturbing between D2D UE exchange operator separately, and make whether there is the decision-making of disturbing between potential operator;(2) base station BS is analyzed interfere information between its potential operator that receives, and whether decision-making carries out uplink measurement;(3) BS identifies and has the honeycomb UE that disturbs and be subjected to serious interference between serious operator, shows that problem has taken place the network design of non-coordination;(4) resource distribution or the O﹠amp of operation maintenance center by BS; M carries out interference coordination.
- 2. method according to claim 1 is characterized in that, described step (1) comprises following content of operation:(11) D2D UE adopts white D2D communication empty or other frequency ranges to exchange the relevant information of disturbing between operator; And the information of this exchange is the pre-defined or D2D UE definition of holding consultation by agreement, comprises plurality of kinds of contents and form; Its content comprises at least: transmission signal power and/or received signal power that the centre frequency of the distinctive network identification mark ID of operator, working frequency range and bandwidth, D2D UE communicate by letter with BS under honeycomb mode;(12) whether D2D UE decision-making is judged to exist between potential operator on its adjacent frequency band and is disturbed;(13) D2D UE reports the relevant information of disturbing between potential operator to BS, for the BS analysis decision, determines whether to carry out out-hole run.
- 3. method according to claim 2 is characterized in that, described step (12) comprises following content of operation:After (12A) D2D UE receives the relevant information of disturbing between operator, extract network ID and working band information earlier, determine to judge whether another D2D UE belongs to other operators and work in nearby frequency bands; If, then the order execution in step (12B); Otherwise, redirect execution in step (12C);(12B) this D2D UE begins to analyze between potential operator and disturbs: whether the uplink transmission power of not knowing the honeycomb UE of another operator because of this D2D UE can produce serious the interference to the honeycomb UE of nearby frequency bands; So decision rule that the transmission signal power that this D2D UE will communicate by letter it earlier with BS transmission signal power and/or received signal power and the other side communicate by letter with BS and/or received signal power utilize following formula: Compare, disturb to judge whether to exist between potential operator; And during the special circumstances under honeycomb mode, disturb between the operator that this D2D UE may be subjected to and the D2D UE of its direct communication brings;In the formula, P TX_2And P TX_1Be respectively two operators user UE2 and UE1 transmitted power of communicating by letter with its BS separately, α 2And α 1For UE2 and UE1 divide the transmission path loss that is clipped to BS2, λ is threshold value; Nearer apart because of two UE, so to simplify the analysis, suppose α 1≈ α 2α 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 divide the received power that is clipped to BS2;If this ratio is greater than threshold value λ, then UE2 judges to exist between potential operator and disturbs redirect execution in step (13); Otherwise namely this ratio is not more than threshold value λ, and then UE2 judges not exist between potential operator and disturbs, and carries out subsequent step (12C);(12C) this D2D UE ignores this information, finishes the whole operating processes of this method.
- 4. method according to claim 3, it is characterized in that: because received power has been reacted the path loss of UE to its BS, so the decision rule in the step (12B) also can expand to by the descending received power of calculating UE and base station communication and calculate its transmitted power, disturbs for judging whether to exist between potential operator.
- 5. method according to claim 1 is characterized in that, described step (2) comprises following content of operation:(21) after BS obtains comprising the information of network ID, bandwidth and centre frequency of other UE the interfere information between the potential operator of the D2D UE that receives report, interference source between operator is classified and analyzed, obtain comprising the reporting number of times, report the information of the D2D UE number that disturbs between identical operator of ratio, D2D UE of its received power and interference, with the expense of knowing that the seriousness disturbed between this operator and assessment are measured, thereby determine whether to do further measurement; If measure, then carry out subsequent step (22); Otherwise, finish the whole operating processes of this method;(22) BS select to adopt one of following dual mode to finish the measurement of disturbing between operator: BS to carry out out-hole run or measured by the D2D UE that is operated in authorized frequency bands; Wherein, the uplink measurement of BS is compulsory, and the measurement of the up link of D2D UE is optional; And for the honeycomb UE that determines to disturb and to be disturbed between operator, by protocol definition or determined to comprise at least the measurement index of received power by BS;Because behind fast Fourier transform FFT, article 2048, have only 1320 to be used for the receiving uplink signal on the subcarrier, so BS is by measuring the received power on its protection frequency band, infer whether to exist between serious operator and disturb that namely BS is as the measurement result on the interference band with the received power on other subcarrier of its frequency band; Simultaneously, this BS knows also which honeycomb UE is adjacent bandwidth assignment given, and this honeycomb UE is in the received power of this BS;(23) if D2D UE can carry out D2D communication by the use authority frequency band, then this D2D UE carries out uplink measurement simultaneously.
- 6. method according to claim 5 is characterized in that, in the described step (22), needs, and BS comprehensively adopts described two kinds of metering systems: carry out rough measure by D2D UE earlier, BS accurately measures after receiving the measurement report of this D2D UE again.
- 7. method according to claim 5 is characterized in that, described step (23) comprises following content of operation:(23A) D2D UE carries out uplink measurement according to the metrical information that BS sends by broadcasting or dedicated channel; This metrical information comprises: the measurement parameter of the potential interference band that measure, measurement duration and received power;After (23B) D2D UE receives metrical information, switch to potential interference band, and according to the request of measuring each measurement parameter of up link is measured;(23C) D2D UE via dedicated channel with measurement report give BS, this measurement result comprise each interference band and on the relevant information of received power, be used for assisting BS to determine the honeycomb UE that is disturbed.
- 8. method according to claim 6, it is characterized in that: disturb between the operator that dual mode is measured in the described step (22), be that the measurement result of the measurement result of D2D UE and BS may be inconsistent, so the uplink measurement of D2D UE is optional, a decision references as BS; And the measurement of BS is compulsory; And for promoting to adopt resource distribution to carry out interference coordination, whether the setting measurement duration is answered in the measurement of up link, disturb in order to can confirm to exist between operator.
- 9. method according to claim 1 is characterized in that, described step (3) comprises following content of operation:(31) after BS obtains the out-hole run result, extract the relevant information of interference band, according to different interference sources measurement result is sorted out again; Simultaneously, know honeycomb UE and the received power thereof that is positioned at the working band edge adjacent with interference band;(32) BS identifies between serious operator at each interference band according to decision rule and disturbs, and distinguish the honeycomb UE that is disturbed: if honeycomb UE on own frequency band up received power and the ratio of the received power of BS on nearby frequency bands greater than setting threshold, just judge to exist between operator and disturb, and this honeycomb UE is subjected to interference between serious operator and becomes the UE that is subjected to serious interference;(33) at the dual mode of BS in the step (22) and D2D UE out-hole run, adopt following two kinds of corresponding decision rules, be used for judging whether to exist between operator disturbing:When (A) D2D UE carries out uplink measurement, adopt formula to be: Decision rule make judgement, if this inequality sets up, then BS judges to exist between operator and disturbs, and this honeycomb UE suffers to disturb between serious operator; In the formula, P RX_aBe the BS that the disturbed up received power at interference band, ACIR is the monkey chatter ratio that is disturbed BS, P RX_aACIR is interference value between the operator that is subjected to of the honeycomb UE that disturbed, P RX_bBe the honeycomb UE up link received power of being disturbed, the interference threshold that the BS that γ arranges when being based on D2D UE uplink measurement can bear;When (B) BS carries out uplink measurement, adopt formula to be:Decision rule judge that if this inequality is set up, then BS judges that corresponding D2D UE suffers to disturb between serious operator; In the formula, P RX_1Be the received power that BS measures at the protection frequency band that is disturbed, the interference threshold that the BS that γ ' arranges when being based on the BS out-hole run can bear, and γ ' is different with the γ value, and the former is more accurate.
- 10. method according to claim 1 is characterized in that, in the described step (4), when BS adopts resource distribution universal time coordinated is carried out in interference, and it is to use dynamic resource, gives to be subjected to the serious honeycomb UE distribution of disturbing away from the frequency spectrum resource piece RB of interference band; Be dispatched on other subcarrier or channel away from interference band by the serious honeycomb UE that disturbs, but this moment, operator should have many subcarriers or channel.
- 11. method according to claim 1 is characterized in that, in the described step (4), when BS adopts O﹠amp; The M mode is carried out universal time coordinated to interference, and BS is earlier to O﹠amp; M send to coordinate request, and describes the following information of disturbing between operator in this coordinations is asked: interference source, be interference band, and interference level or annoyance level, i.e. the inequality ratio of step (33); O﹠amp; M judges whether to carry out the coordination of resource distribution according to the information that receives, if, O﹠amp then; M is by reconfiguring or adjust the sub-carrier frequencies of another BS that is disturbed, disturbs between operator avoiding; Perhaps by O﹠amp; M and other operator consult resource allocation proposal.
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