CN102685757A

CN102685757A - Method and system for coordinating interference among communities

Info

Publication number: CN102685757A
Application number: CN2011100630553A
Authority: CN
Inventors: 刘献玲
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-03-16
Filing date: 2011-03-16
Publication date: 2012-09-19
Anticipated expiration: 2031-03-16
Also published as: WO2012122831A1; CN102685757B

Abstract

The invention discloses a method and a system for coordinating interference among communities; the method comprises the following steps that: a first community calculates the number of user equipment with the quality of service (QOS) not meeting a standard or the number of the user equipment with failing wireless link; and the relative narrowband TX power (RNTP) threshold of the first community and/or a second community which is adjacent to the first community is adjusted according to the number and a preset threshold of number. According to the invention, the interference among the communities can be coordinated according to the load changes of a network, so that the performance on the community edge is optimized.

Description

Inter-cell interference coordination method and system

Technical field

The present invention relates to the communications field, in particular to a kind of inter-cell interference coordination method and system.

Background technology

Presence of intercell interference (Inter-Cell Interference abbreviates ICI as) is an intrinsic problem of cell mobile communication systems, and traditional solution is to adopt channeling.Following wide-band mobile communication system Long Term Evolution (Long-Term Evolution abbreviates LTE as) is very high to the requirement of spectrum efficiency, therefore hopes as much as possible near spectrum reuse coefficient 1.OFDM (Orthogonal Frequency Division Multiplexing; Abbreviate OFDM as) technological than code division multiple access (Code Division MultipleAccess; Abbreviate CDMA as) the technological problem of disturbing in the sub-district that solved better; But as cost, the ICI problem that ofdm system brings is more serious than cdma system.If two neighbor cells use identical frequency spectrum resource in their joint portion, then can produce stronger ICI.

Interference between downlink cell is from the base station of adjacent cell; When the spectrum reuse coefficient is 1, Any user will receive the interference of adjacent cell downlink signal inevitably in the sub-district, be positioned at the user of center of housing estate because the decline of adjacent cell signal large scale is relatively large; Therefore the interference that receives is relatively also less; But the user's useful signal decay that is positioned at cell edge is bigger, and adjacent cell signal attenuation is relatively low, and the interference that therefore in view of the UE susceptibility, receives is more serious; 3GPP LTE mainly utilizes various interference coordination technique (Inter-Cell Interference Coordination; Abbreviate ICIC as) carry out Interference Control, reduce interference level, improve the edge customer throughput.The basic principle of Inter-Cell Interference Coordination all is that management is provided with certain restriction to downlink or uplink resource (frequency band or power), to coordinate the action of each sub-district, avoids producing serious presence of intercell interference.And each manufacturer to propose maximum be to adopt partial frequency multiplexing (Fractional Frequency Reuse; Abbreviate FFR as) or soft-frequency reuse (Soft Frequency Reuse abbreviates SFR as), promptly cell edge can only use the part of whole available frequency band; And the frequency that the neighbor cell edge uses will stagger; The frequency range that cell edge uses is sent with high power, and whole frequency can be used in inside, sub-district, if the inner neighbor cell edge frequency range of using in sub-district needs low-power to send.

From the angle of FFR or SFR, the bitmap of descending narrow emission power indication (Relative Narrowband TX Power abbreviates RNTP as) indication is a static configuration, and beginning has distributed 0 and 1 just according to planning, in case distribute just fixing can not the change.

But, carry out Inter-Cell Interference Coordination according to this fixing bitmap, can not adapt to the variation of network load, thus the performance of interference coordination between restricted cell.

Summary of the invention

To carrying out Inter-Cell Interference Coordination according to fixing bitmap in the correlation technique; Can not adapt to network load variation problem and the present invention is proposed; For this reason, main purpose of the present invention is to provide a kind of inter-cell interference coordination method and system, to address the above problem.

To achieve these goals, according to an aspect of the present invention, a kind of inter-cell interference coordination method is provided.

Inter-cell interference coordination method according to the present invention comprises: the quantity of the subscriber equipment of below standard subscriber equipment of QOS or Radio Link Failure in first sub-district statistics self; According to quantity and predefined quantity thresholding, adjust the RNTP thresholding of first sub-district and/or second sub-district adjacent with first sub-district.

Further; According to quantity and predefined quantity thresholding; The RNTP thresholding of adjusting first sub-district and/or second sub-district adjacent with first sub-district comprises: under the situation of quantity more than or equal to the quantity thresholding, reduce the RNTP thresholding of first sub-district and/or second sub-district adjacent with first sub-district.

Further, the RNTP thresholding that reduces by first sub-district and/or second sub-district adjacent with first sub-district comprises: the RNTP thresholding after first sub-district is confirmed to reduce; The RNTP thresholding after reducing is used in first sub-district; It is the transmitting power on zero the Physical Resource Block PRB that first sub-district reduces RNTP bitmap meta; The RNTP thresholding after reducing is sent to second sub-district in first sub-district.

Further, the RNTP thresholding that reduces by first sub-district and/or second sub-district adjacent with first sub-district also comprises: second sub-district receives from the RNTP thresholding after the reduction of first sub-district; Second sub-district receives the RNTP thresholding from three sub-district adjacent with second sub-district; Lower RNTP thresholding is confirmed in second sub-district among RNTP thresholding after the reduction and the RNTP thresholding from the 3rd adjacent sub-district; Second sub-district judges that lower RNTP thresholding is whether less than the RNTP thresholding of the current use in second sub-district; If judged result is for being, then lower RNTP thresholding is used in second sub-district, and to reduce RNTP bitmap meta be the transmitting power on zero the PRB.

Further; According to quantity and predefined quantity thresholding; The RNTP thresholding of adjusting first sub-district and/or second sub-district adjacent with first sub-district comprises: be under zero the situation in quantity, improve the RNTP thresholding of first sub-district and/or second sub-district adjacent with first sub-district.

Further, the RNTP thresholding that improves first sub-district and/or second sub-district adjacent with first sub-district comprises: the RNTP thresholding that request improves is confirmed in first sub-district; The RNTP thresholding that improve to the Operations, Administration and Maintenance OAM request of sending first sub-district.

Further, the RNTP thresholding that improves first sub-district and/or second sub-district adjacent with first sub-district also comprises: OAM receives the RNTP thresholding that the request from first sub-district improves; OAM receives the RNTP thresholding from second sub-district, wherein comprises one of following from the RNTP thresholding of second sub-district: the RNTP thresholding that the second sub-district request improves, the RNTP thresholding of the current use in second sub-district; OAM receives the RNTP thresholding from four sub-district adjacent with first sub-district, wherein comprises one of following from the RNTP thresholding of the 4th sub-district: the RNTP thresholding that the 4th sub-district request improves, the RNTP thresholding of the current use in the 4th sub-district; Only comprise in the adjacent area of first sub-district under the situation of second sub-district and the 4th sub-district, OAM confirms lower RNTP thresholding among RNTP thresholding and the RNTP thresholding from the 4th sub-district from second sub-district; OAM judges the RNTP thresholding whether lower RNTP thresholding improves greater than the request from first sub-district; If judged result is for being, then OAM notifies first sub-district to use lower RNTP thresholding.

Further, after OAM notified the lower RNTP thresholding of first sub-district use, said method also comprises: lower RNTP thresholding was used in first sub-district; It is the transmitting power on zero the PRB that RNTP bitmap meta is improved in first sub-district.

Further, the RNTP thresholding that improves first sub-district and/or second sub-district adjacent with first sub-district also comprises: OAM receives the RNTP thresholding that the request from first sub-district improves; OAM receives the RNTP thresholding from the request raising of second sub-district; OAM receives the RNTP thresholding from five sub-district adjacent with second sub-district, wherein comprises one of following from the RNTP thresholding of the 5th sub-district: the RNTP thresholding that the 5th sub-district request improves, the RNTP thresholding of the current use in the 5th sub-district; Only comprise in the adjacent area of second sub-district under the situation of first sub-district and the 5th sub-district, OAM confirms lower RNTP thresholding among RNTP thresholding and the RNTP thresholding from the 5th sub-district that the request from first sub-district improves; OAM judges the RNTP thresholding whether lower RNTP thresholding improves greater than the request from second sub-district; If judged result is for being, then OAM notifies second sub-district to use lower RNTP thresholding.

Further, after OAM notified the lower RNTP thresholding of second sub-district use, said method also comprises: lower RNTP thresholding was used in second sub-district; It is the transmitting power on zero the PRB that RNTP bitmap meta is improved in second sub-district.

Further; According to quantity and predefined quantity thresholding; The RNTP thresholding of adjusting first sub-district and/or second sub-district adjacent with first sub-district comprises: be not equal to less than quantity thresholding and quantity in quantity under zero the situation, first sub-district is added up the quantity of the subscriber equipment of below standard subscriber equipment of QOS in self or Radio Link Failure again.

Further; The quantity of the subscriber equipment of first sub-district through comprising subscriber equipment that QOS in one of the following statistical statistics self is below standard or Radio Link Failure: when moving from first sub-district, the cycle statistical of adding up according to the predefined cycle; When the RNTP of first sub-district thresholding is adjusted, the incident statistical of adding up according to the predefined cycle.

To achieve these goals, according to another aspect of the present invention, a kind of Inter-Cell Interference Coordination system is provided.

Comprise first sub-district and second sub-district adjacent according to Inter-Cell Interference Coordination of the present invention system with first sub-district; Wherein first sub-district comprises: statistical module is used for adding up the quantity of the subscriber equipment of below standard subscriber equipment of self QOS or Radio Link Failure; Adjusting module is used for adjusting the RNTP thresholding of first sub-district and/or second sub-district according to quantity and predefined quantity thresholding.

Through the present invention,, can realize changing and carry out Inter-Cell Interference Coordination, thereby optimize the performance of cell edge according to network load according to the RNTP thresholding of the quantity adjustment adjacent area of the subscriber equipment of the below standard subscriber equipment of QOS of statistics or Radio Link Failure.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:

Fig. 1 is the flow chart according to the inter-cell interference coordination method of the embodiment of the invention;

Fig. 2 is the flow chart of inter-cell interference coordination method according to the preferred embodiment of the invention;

Fig. 3 is according to the divided band resource of the preferred embodiment of the present invention one and the sketch map of RNTP bitmap is set;

Fig. 4 is the interaction diagrams according to the preferred embodiment of the present invention one;

Fig. 5 is according to the divided band resource of the preferred embodiment of the present invention two and preferred embodiment three and the sketch map of RNTP bitmap is set;

Fig. 6 is the interaction diagrams according to the preferred embodiment of the present invention two;

Fig. 7 is the interaction diagrams according to the preferred embodiment of the present invention three;

Fig. 8 is the structured flowchart according to the Inter-Cell Interference Coordination system of the embodiment of the invention.

Embodiment

Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.

The embodiment of the invention provides a kind of inter-cell interference coordination method.Fig. 1 is the flow chart according to the inter-cell interference coordination method of the embodiment of the invention, and is as shown in Figure 1, comprises that following step S102 is to step S104.

Step S102, the quantity of the subscriber equipment of below standard subscriber equipment of QOS or Radio Link Failure in first sub-district statistics self.

Step S104 according to quantity and predefined quantity thresholding, adjusts the RNTP thresholding of first sub-district and/or second sub-district adjacent with first sub-district.

In the correlation technique, carry out Inter-Cell Interference Coordination, can not adapt to the variation of network load according to fixing bitmap.In the embodiment of the invention; RNTP thresholding according to the quantity adjustment adjacent area of the subscriber equipment of the below standard subscriber equipment of QOS of statistics or Radio Link Failure; Can realize according to network load variation carrying out Inter-Cell Interference Coordination, thus the performance of optimization cell edge.

Need to prove that the present invention can utilize the RNTP thresholding of existing signaling process (for example, through the LOADINFORMATION message of X2 interface) adjustment adjacent area, thereby can compatible preferably existing protocol.

Need to prove that above-mentioned predefined quantity thresholding can be set according to total number of edge UE and/or loads.

Preferably; According to quantity and predefined quantity thresholding; The RNTP thresholding of adjusting first sub-district and/or second sub-district adjacent with first sub-district comprises: under the situation of quantity more than or equal to the quantity thresholding, reduce the RNTP thresholding of first sub-district and/or second sub-district adjacent with first sub-district.

Preferably, the RNTP thresholding that reduces by first sub-district and/or second sub-district adjacent with first sub-district comprises: the RNTP thresholding after first sub-district is confirmed to reduce; The RNTP thresholding after reducing is used in first sub-district; It is the transmitting power on zero the PRB that first sub-district reduces RNTP bitmap meta; The RNTP thresholding after reducing is sent to second sub-district in first sub-district.

Preferably, the RNTP thresholding that reduces by first sub-district and/or second sub-district adjacent with first sub-district also comprises: second sub-district receives from the RNTP thresholding after the reduction of first sub-district; Second sub-district receives the RNTP thresholding from three sub-district adjacent with second sub-district; Lower RNTP thresholding is confirmed in second sub-district among RNTP thresholding after the reduction and the RNTP thresholding from the 3rd adjacent sub-district; Second sub-district judges that lower RNTP thresholding is whether less than the RNTP thresholding of the current use in second sub-district; If judged result is for being, then lower RNTP thresholding is used in second sub-district, and to reduce RNTP bitmap meta be the transmitting power on zero the PRB.

Preferably; According to quantity and predefined quantity thresholding; The RNTP thresholding of adjusting first sub-district and/or second sub-district adjacent with first sub-district comprises: be under zero the situation in quantity, improve the RNTP thresholding of first sub-district and/or second sub-district adjacent with first sub-district.

Preferably, the RNTP thresholding that improves first sub-district and/or second sub-district adjacent with first sub-district comprises: the RNTP thresholding that request improves is confirmed in first sub-district; The RNTP thresholding that improve to Operations, Administration and Maintenance Operations, Administration and Maintenance (Operation Administration and Maintenance the abbreviates OAM as) request of sending first sub-district.

Preferably, the RNTP thresholding that improves first sub-district and/or second sub-district adjacent with first sub-district also comprises: OAM receives the RNTP thresholding that the request from first sub-district improves; OAM receives the RNTP thresholding from second sub-district, wherein comprises one of following from the RNTP thresholding of second sub-district: the RNTP thresholding that the second sub-district request improves, the RNTP thresholding of the current use in second sub-district; OAM receives the RNTP thresholding from four sub-district adjacent with first sub-district, wherein comprises one of following from the RNTP thresholding of the 4th sub-district: the RNTP thresholding that the 4th sub-district request improves, the RNTP thresholding of the current use in the 4th sub-district; Only comprise in the adjacent area of first sub-district under the situation of second sub-district and the 4th sub-district, OAM confirms lower RNTP thresholding among RNTP thresholding and the RNTP thresholding from the 4th sub-district from second sub-district; OAM judges the RNTP thresholding whether lower RNTP thresholding improves greater than the request from first sub-district; If judged result is for being, then OAM notifies first sub-district to use lower RNTP thresholding.

Preferably, after OAM notified the lower RNTP thresholding of first sub-district use, said method also comprises: lower RNTP thresholding was used in first sub-district; It is the transmitting power on zero the PRB that RNTP bitmap meta is improved in first sub-district.

Preferably, the RNTP thresholding that improves first sub-district and/or second sub-district adjacent with first sub-district also comprises: OAM receives the RNTP thresholding that the request from first sub-district improves; OAM receives the RNTP thresholding from the request raising of second sub-district; OAM receives the RNTP thresholding from five sub-district adjacent with second sub-district, wherein comprises one of following from the RNTP thresholding of the 5th sub-district: the RNTP thresholding that the 5th sub-district request improves, the RNTP thresholding of the current use in the 5th sub-district; Only comprise in the adjacent area of second sub-district under the situation of first sub-district and the 5th sub-district, OAM confirms lower RNTP thresholding among RNTP thresholding and the RNTP thresholding from the 5th sub-district that the request from first sub-district improves; OAM judges the RNTP thresholding whether lower RNTP thresholding improves greater than the request from second sub-district; If judged result is for being, then OAM notifies second sub-district to use lower RNTP thresholding.

Preferably, after OAM notified the lower RNTP thresholding of second sub-district use, said method also comprises: lower RNTP thresholding was used in second sub-district; It is the transmitting power on zero the PRB that RNTP bitmap meta is improved in second sub-district.

Preferably; According to quantity and predefined quantity thresholding; The RNTP thresholding of adjusting first sub-district and/or second sub-district adjacent with first sub-district comprises: be not equal to less than quantity thresholding and quantity in quantity under zero the situation, first sub-district is added up the quantity of the subscriber equipment of below standard subscriber equipment of QOS in self or Radio Link Failure again.

Preferably; The quantity of the subscriber equipment of first sub-district through comprising subscriber equipment that QOS in one of the following statistical statistics self is below standard or Radio Link Failure: when moving from first sub-district, the cycle statistical of adding up according to the predefined cycle; When the RNTP of first sub-district thresholding is adjusted, the incident statistical of adding up according to the predefined cycle.

Preferably, in the actual count process, the statistical of other each sub-district can be similar with first sub-district, promptly comprises one of following: certainly during the operation of this sub-district, and the cycle statistical of adding up according to the predefined cycle; When the RNTP of this sub-district thresholding is adjusted, the incident statistical of adding up according to the predefined cycle.

Preferably; In first sub-district statistics self before the quantity of the subscriber equipment of below standard subscriber equipment of QOS or Radio Link Failure; Said method also comprises: to all sub-districts according to different topological structures bunch to be unit, be divided into two parts to whole downlink system bandwidth, a part is used to central user; Another part uses to edge customer, and the frequency band that uses for edge customer will guarantee to stagger fully between neighbor cell.Central user can be used the frequency resource of adjacent Cell Edge User, if use, transmitting power will be restricted when then central user was used.

Preferably; After being divided into two parts to whole downlink system bandwidth; Said method also comprises: the PRB that use the edge customer that is allocated to this sub-district all sub-districts goes up corresponding RNTP bitmap position and is " 1 "; Transmitting power on the PRB that is changed to " 1 " is unrestricted, allows always with maximum transmission power emission, the i.e. P of correspondence _AValue can allow to get maximum always; The upward corresponding RNTP bitmap of PRB that other user is used all is changed to " 0 ", and the transmitting power on the PRB that is changed to " 0 " is restricted, and can dynamically adjust.

Preferably, the transmitting power on the PRB that is changed to " 0 " dynamically adjusted comprise: initial power is adjusted into full power emission, i.e. P on this PRB in advance _A(power of PDSCH is with respect to the difference of cell reference signals power on the category-A symbol) corresponding value is made as the maximum of stipulating in the agreement.

Preferably; The sub-district of receiving the RNTP indication is when scheduling; The user that can only dispatch this center of housing estate to RNTP bitmap position, adjacent sub-district for the PRB of " 1 ", and RNTP bitmap position, adjacent sub-district be the user of this cell edge of PRB priority scheduling of " 0 ", next is a central user.

Below in conjunction with Fig. 2 above-mentioned inter-cell interference coordination method is described.

Fig. 2 is the flow chart of inter-cell interference coordination method according to the preferred embodiment of the invention, and is as shown in Figure 2, comprises that following step S202 is to step S230.

Step S202, each PRB of all sub-districts go up the maximum P that allows _AInitial value is made as the maximum of stipulating in the agreement.

Step S204 begins to add up T _PeriodThe number Num of the problematic UE in this sub-district in time.

Whether step S206 judges Num more than or equal to TrdNum, if then carry out step S208, otherwise carry out step S218.

Step S208, the maximum P that allows _AReduce a step, the RNTP thresholding also reduces a step simultaneously.

Step S210 notifies all adjacent sub-districts new RNTP thresholding.

Step S212 after receive adjacent sub-district, extracts the minimum M inTrd of all RNTP thresholdings that receive.

Step S214, the RNTP thresholding of usefulness is judged greater than MinTrd in adjacent sub-district whether, if, then to carry out step S216, otherwise return step S204, statistics T is continued in promptly adjacent sub-district _PeriodThe number Num of the problematic UE in this sub-district in time.

Step S216, the RNTP thresholding that oneself is revised in adjacent sub-district is MinTrd, and the maximum P that allows _A

Step S218 judges whether Num equals 0, if, then to carry out step S220, otherwise return step S204, T is restarted to add up in this sub-district _PeriodThe number Num of the problematic UE in this sub-district in time.

Step S220 sends a request and a target gate RTrd who improves the RNTP thresholding to OAM.

Step S222, OAM extract the minimum M inReTrd of the RNTP thresholding (if adjacent sub-district does not have request, getting the thresholding that is using adjacent sub-district) of its all adjacent sub-district requests.

Whether step S224 judges MinReTrd greater than RTrd, if then carry out step S226, otherwise carry out step S230.

It is MinReTrd that step S226, OAM notify this sub-district to improve the RNTP thresholding.

Step S228, the RNTP thresholding of revising oneself is MinReTrd, and the maximum P that allows _A

Step S230, OAM notify this sub-district can not improve the RNTP thresholding.

To combine instance that the implementation procedure of the embodiment of the invention is described in detail below.

Preferred embodiment one

Fig. 3 is according to the divided band resource of the preferred embodiment of the present invention one and the sketch map of RNTP bitmap is set, and is as shown in Figure 3, comprises three sub-districts of adjacent area each other, serves as theme with sub-district 1 below the enforcement of technical scheme is done further to describe in detail.

If the TrdNum=3 of these three sub-districts, and initial RNTP Threshold is 1dB.

(1) divided band resource.

The whole system bandwidth is divided into 4 parts, is unit with PRB during division, can be continuous also can be discontinuous; The frequency band that frequency band A is corresponding is three all spendable parts of center of housing estate; And B is the use of 1 edge, sub-district, and C is that 2 edges, sub-district use, and D is that 3 edges, sub-district use;

(2) RNTP bitmap is set.

The frequency band C and the D at 2 and 3 edges can be used in 1 center, sub-district, so the part of corresponding B is changed to " 1 " among the RNTP bitmap of sub-district 1, and other frequency band just is changed to " 0 "; In like manner the part of corresponding C is changed to " 1 " among the RNTP bitmap of sub-district 2, and other frequency band just is changed to " 0 "; The part of corresponding D is changed to " 1 " among the RNTP bitmap of sub-district 3, and other frequency band just is changed to " 0 ".

(3) all RNTP bitmap positions, sub-district all allow with the maximum transmission power emission for the power initial condition on the PRB of " 0 ", the promptly maximum P that allows _AInitially be made as the maximum 3dB that stipulates in the agreement.

(4) there is the number of problem UE this sub-district of statistics in statistic period T period, comprises QOS UE that can't satisfy or Radio Link Failure, and the statistical value of supposing sub-district 1 is 5, sub-district 2 be 1, sub-district 3 be 0.

(5) each district dynamic is adjusted the power on the PRB that RNTP bitmap position is " 0 ", and detailed process is seen accompanying drawing 4.

Problematic UE number 5＞threshold value 3 is judged in sub-district 1, therefore reduces the bitmap position and is the upward maximum step of PA that allows of the PRB of " 0 ", and the RNTP threshold value also will reduce a step, P simultaneously _AAccording to following order reduce by 3,2,1,0 ,-1.77 ,-3 ,-4.77 ,-6}, the RNTP thresholding reduces { 3,2,1,0 ,-1 ,-2 ,-3 ,-4 ,-5 ,-6 ,-7 ,-8 ,-9 ,-10 ,-11 ,-∞ } according to following order, thus sub-district 1 reduce the maximum permission in back P _AValue just is 2, and the RNTP thresholding be 0dB just, and the adjustment back LOAD INFORMATION message that finishes is told sub-district 2 and 3 new RNTP thresholdings; Problematic UE number is found between TrdNum and 0 in sub-district 2, then directly triggers next statistic period T period and adds up again, be i.e. the statistics of Event triggered; Sub-district 3 finds that the UE of its service is all no problem, then sends the request that improves a step of RNTP thresholding to OAM, and the RNTP thresholding improves { ∞ ,-11 ,-10 ,-9 ,-8 according to following order;-7 ,-6 ,-5 ,-4 ,-3 ,-2;-1,0,1,2,3} hopes that promptly the RNTP thresholding brings up to 2dB.

(6) after the LOAD INFORMATION of sub-district 1 is received in

sub-district

2 and 3, extract the RNTP thresholding of the minimum of all adjacent sub-districts that receive, the RNTP thresholding of sub-district 1 has all just been received in two sub-districts here, and compares with the thresholding that oneself is using.

(6.1) sub-district 2 and sub-district 3 current uses is 1, and all greater than the thresholding that receives 0, revising the thresholding that oneself is using is 0, and modification RNTP bitmap position is P for the power on the PRB of " 0 " _AValue is 2.

(6.2) after the modification, sub-district 2 and 3 can be 1RNTP bitmap position, sub-district the user of PRB control centre of " 1 " when scheduling, and RNTP bitmap position is the PRB priority scheduling edge customer of " 0 ", is central user secondly.

(6.3)

sub-district

2 and 3 gets into next statistic period T period and adds up the number that problem UE is arranged again, i.e. the statistics of Event triggered.

(7) after OAM receives the LOAD INFORMATION of sub-district 3, extract the minimum value of RNTP thresholding of the request of all the adjacent sub-districts receive, if not request with the RNTP thresholding replacement of using.

(7.1) sub-district 1 and sub-district 2 current uses is 0, and all less than the thresholding that receives 2, so OAM notifies this sub-district can not improve the RNTP thresholding.

Preferred embodiment two

Fig. 5 is according to the divided band resource of the preferred embodiment of the present invention two and preferred embodiment three and the sketch map of RNTP bitmap is set; As shown in Figure 5; Comprise four sub-districts with multilayer adjacent area, wherein the adjacent area of sub-district 1 is respectively sub-district 2 and sub-district 3, and the adjacent area of sub-district 2 has only sub-district 1; The adjacent area of sub-district 3 is respectively sub-district 1 and sub-district 4, and the adjacent area of sub-district 4 has only sub-district 3.

If the TrdNum=3 of all sub-districts, sub-district 1,2,3 initial RNTP Threshold are 1dB, and sub-district 4 initial RNTP Threshold are 0dB.

(1) divided band resource.

For the sub-district shown in the accompanying drawing 5, all band resources are equally divided into 3 parts, and wherein A is the special-purpose frequency bands of all Cell Center User, and for sub-district 1, the spendable frequency band of edge customer is B; To

sub-district

2 and 3 edges can with band resource be the C zone; For 4 edges, sub-district can with band resource be B zone.

(2) RNTP bitmap is set.

The frequency band C at 2 and 3 edges can be used in 1 center, sub-district, so the part of corresponding B is changed to " 1 " among the RNTP bitmap of sub-district 1, and other frequency band just is changed to " 0 "; In like manner the part of corresponding C is changed to " 1 " among the RNTP bitmap of sub-district 2 and sub-district 3, and other frequency band just is changed to " 0 "; The part of corresponding B is changed to " 1 " among the RNTP bitmap of sub-district 4, and other frequency band just is changed to " 0 ".

(3) all RNTP bitmap positions, sub-district all allow with the maximum transmission power emission for the power initial condition on the PRB of " 0 ", and the promptly maximum PA that allows initially is made as maximum.

(4) there is the number of problem UE this sub-district of statistics in statistic period T period, comprises QOS UE that can't satisfy or Radio Link Failure, and the statistical value of supposing sub-district 1 is 5, sub-district 2 be 1, sub-district 3 be 2, sub-district 4 be 4.

(5) each district dynamic is adjusted the power on the PRB that RNTP bitmap position is " 0 ", and detailed process is seen accompanying drawing 6.

Problematic UE number 5＞threshold value 3 is judged in sub-district 1, therefore reduces the bitmap position and is the upward maximum step of PA that allows of the PRB of " 0 ", and the RNTP threshold value also will reduce a step, P simultaneously _AAccording to following order reduce by 3,2,1,0 ,-1.77 ,-3 ,-4.77 ,-6}, the RNTP thresholding reduces { 3,2,1,0 ,-1 ,-2 ,-3 ,-4 ,-5 ,-6 ,-7 ,-8 ,-9 ,-10 ,-11 ,-∞ } according to following order, thus sub-district 1 reduce the maximum permission in back P _AValue just is 2, and the RNTP thresholding be 0dB just, and 1 adjustment finishing back, a sub-district LOAD INFORMATION message is told sub-district 2 and 3 new RNTP thresholdings; Problematic UE number is found between TrdNum and 0 in sub-district 2,3, and it is the statistics of Event triggered that the next measurement period of then direct entering is added up again; Problematic UE number 4＞threshold value 3 is judged in sub-district 4, therefore reduces maximum step of PA that allows, and the RNTP threshold value also will reduce a step simultaneously, is-1dB; The RNTP thresholding that LOADINFORMATION message tells that sub-district 3 is new is sent out in adjustment finishing back, sub-district 4.

(6) after the LOAD INFORMATION of sub-district 1 is received in

sub-district

2 and 3, extract the RNTP thresholding of the minimum of all adjacent sub-districts that receive.

(6.1) just received the RNTP thresholding of sub-district 1 for sub-district 2; And compare with the thresholding that oneself using; Sub-district 2 current uses be 1; Greater than the thresholding that receives 0, revising the thresholding that oneself is using is 0, and modification RNTPbitmap position is that the PA value is 2 for the power on the PRB of " 0 "; Except the RNTP thresholding that receives sub-district 1, also received the RNTP threshold value-1 of sub-district 4 for sub-district 3 hypothesis; The RNTP thresholding of the minimum of the adjacent sub-district of all that then receive is-1; And the RNTP thresholding that is using sub-district 3 is 1; Therefore will to revise own RNTP thresholding be-1 in sub-district 3, and the bitmap position is 1dB for the PA value that the PRB of " 0 " goes up the maximum permission also will reduce by 2 step; 3 the LOADINFORMATION message in sub-district are told sub-district 1 and 4 new RNTP thresholdings then; Also be revised as 1 to oneself RNTP thresholding after same sub-district 1 receives this message, 1dB is revised as for the PA value that the PRB of " 0 " goes up maximum permission in the bitmap position, and 1 the LOAD INFORMATION in sub-district message is told the RNTP thresholding that sub-district 2 is new then; The RNTP thresholding that oneself also will be revised in sub-district 2 is 1, and the bitmap position is that the PRB of " 0 " goes up the maximum P that allows _AValue is revised as 1dB;

(6.2) after RNTP thresholding and PA value are revised in each sub-district, when scheduling, can be 1RNTP bitmap position, sub-district the user of PRB control centre of " 1 ", RNTP bitmap position be the PRB priority scheduling edge customer of " 0 ", is central user secondly.

(6.3) after each sub-district is revised and accomplished, get into the number that next measurement period is added up again has problem UE, i.e. the statistics of Event triggered.

Preferred embodiment three

With sub-district shown in Figure 5 is example.

If all

sub-district

1,2,3,4 initial RNTP Threshold are 1dB.Signaling process sees accompanying drawing 7 for details.

(1) divided band resource.

For the sub-district shown in the accompanying drawing 4, all band resources are equally divided into 3 parts, and wherein A is the special-purpose frequency bands of all Cell Center User, and for sub-district 1, the spendable frequency band of edge customer is B; To

sub-district

(2) RNTP bitmap is set.

The frequency band C at 2 and 3 edges can be used in 1 center, sub-district, so the part of corresponding B is changed to " 1 " among the RNTP bitmap of sub-district 1, and other frequency band just is changed to " 0 "; In like manner the part of corresponding C is changed to " 1 " among

sub-district

2 and 3 the RNTP bitmap, and other frequency band just is changed to " 0 "; The part of corresponding B is changed to " 1 " among the RNTP bitmap of sub-district 4, and other frequency band just is changed to " 0 ".

(3) all RNTP bitmap positions, sub-district all allow to launch with maximum transmission power for the power initial condition on the PRB of " 0 "; The promptly maximum PA that allows initially is made as maximum; But present embodiment is the operation of the carrying out after network operation a period of time; Promptly experienced the process that reduces power, so PA reduced, supposed that current value is 0dB.

(4) there is the number of problem UE this sub-district of statistics in statistic period T period, comprises QOS UE that can't satisfy or Radio Link Failure, and the statistical value of supposing sub-district 1 is 0, sub-district 2 be 1, sub-district 3 be 0, sub-district 4 be 0.

(5) each district dynamic is adjusted the power on the PRB that RNTP bitmap position is " 0 ", and detailed process is seen accompanying drawing 5.Sub-district 1,3,4 judges that problematic UE number is 0, therefore sends the request that improves a step of RNTP thresholding to OAM, improves { ∞ ,-11 ,-10 ,-9 ,-8 according to following order;-7 ,-6 ,-5 ,-4 ,-3 ,-2 ,-1; 0,1,2,3},, the RNTP thresholding of request is 2dB; Sub-district 2 between 0 and thresholding 3 between, therefore, sub-district 2 directly gets into next measurement period and restarts to add up problematic UE number, the i.e. statistics of Event triggered.

(6) after OAM receives the request of sub-district 1,3 and sub-district 4, to each sub-district difference judgment processing.

(6.1) for sub-district 1, its all adjacent sub-districts are sub-district 2 and sub-district 3, because the request that the RNTP thresholding is not improved in

sub-district

2, and 2 thresholdings that using are 1dB, be lower than the thresholding 2dB of request, so OAM notifying cell 1 do not improve its RNTP thresholding.

(6.2) do not improve the request of RNTP thresholding for sub-district 2, so OAM does not carry out advise of same to sub-district 2.

(6.3) for sub-district 3, the be improved request of RNTP thresholding of its all adjacent sub-districts 1 and 4, and also there is this request sub-district 3, so the OAM notifying cell 3 minimum value 2dB that to improve its RNTP thresholdings be all requests.

(6.4) for sub-district 4, there is the request that improves the RNTP thresholding its adjacent sub-district 3, then the sub-district 4 minimum value 2dB that to improve its RNTP thresholdings be all requests.

(7) sub-district 3 receives that it is 2dB that the RNTP thresholding of oneself is improved in this notice back, and adjustment RNTP bitmap position is 1dB for step of PA that the maximum on the PRB of " 0 " allows.

(8) after all sub-districts increase the RNTP thresholding of oneself, all to get into the statistics of Event triggered, get into next measurement period and restart to add up problematic UE number.

Need to prove; Can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions; And; Though logical order has been shown in flow chart, in some cases, can have carried out step shown or that describe with the order that is different from here.

The embodiment of the invention provides a kind of Inter-Cell Interference Coordination system, and this Inter-Cell Interference Coordination system can be used to realize above-mentioned inter-cell interference coordination method.Fig. 8 is the structured flowchart according to the Inter-Cell Interference Coordination system of the embodiment of the invention; As shown in Figure 8; Comprise first sub-district 82 and second sub-district 84 adjacent with first sub-district 82, wherein first sub-district 82 comprises statistical module 822 and adjusting module 824, is described in detail in the face of its structure down.

Statistical module 822 is used for adding up the quantity of the subscriber equipment of below standard subscriber equipment of self QOS or Radio Link Failure; Adjusting module 824 is connected to statistical module 822, is used for quantity and predefined quantity thresholding according to statistical module 822 statistics, adjusts the RNTP thresholding of first sub-district 82 and/or second sub-district 84.

Need to prove that the Inter-Cell Interference Coordination system of describing among the device embodiment is corresponding to above-mentioned method embodiment, its concrete implementation procedure had been carried out detailed description in method embodiment, repeat no more at this.

In sum, according to the abovementioned embodiments of the present invention, a kind of inter-cell interference coordination method and system are provided.Through the present invention,, can realize changing and carry out Inter-Cell Interference Coordination, thereby optimize the performance of cell edge according to network load according to the RNTP thresholding of the quantity adjustment adjacent area of the subscriber equipment of the below standard subscriber equipment of QOS of statistics or Radio Link Failure.

Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.

The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. an inter-cell interference coordination method is characterized in that, comprising:

The quantity of the subscriber equipment of below standard subscriber equipment of service quality QOS or Radio Link Failure in first sub-district statistics self;

According to said quantity and predefined quantity thresholding, adjust the narrow emission power indication RNTP thresholding of said first sub-district and/or second sub-district adjacent with said first sub-district.

2. method according to claim 1; It is characterized in that; According to said quantity and predefined quantity thresholding; The RNTP thresholding of adjusting said first sub-district and/or second sub-district adjacent with said first sub-district comprises: under the situation of said quantity more than or equal to said quantity thresholding, reduce the said RNTP thresholding of said first sub-district and/or second sub-district adjacent with said first sub-district.

3. method according to claim 2 is characterized in that, the said RNTP thresholding that reduces said first sub-district and/or second sub-district adjacent with said first sub-district comprises:

RNTP thresholding after said first sub-district is confirmed to reduce;

The RNTP thresholding after the said reduction is used in said first sub-district;

It is the transmitting power on zero the Physical Resource Block PRB that said first sub-district reduces RNTP bitmap meta;

The RNTP thresholding of said first sub-district after said reduction is sent in said second sub-district.

4. method according to claim 3 is characterized in that, the said RNTP thresholding that reduces said first sub-district and/or second sub-district adjacent with said first sub-district also comprises:

Said second sub-district receives from the RNTP thresholding after the said reduction of said first sub-district;

Said second sub-district receives the RNTP thresholding from three sub-district adjacent with said second sub-district;

Lower RNTP thresholding is confirmed in said second sub-district among RNTP thresholding after the said reduction and said RNTP thresholding from the 3rd adjacent sub-district;

Said second sub-district judges that said lower RNTP thresholding is whether less than the RNTP thresholding of the said current use in second sub-district;

If judged result is for being, said lower RNTP thresholding is used in then said second sub-district, and to reduce RNTP bitmap meta be the transmitting power on zero the PRB.

5. method according to claim 1; It is characterized in that; According to said quantity and predefined quantity thresholding; The RNTP thresholding of adjusting said first sub-district and/or second sub-district adjacent with said first sub-district comprises: be under zero the situation in said quantity, improve the said RNTP thresholding of said first sub-district and/or second sub-district adjacent with said first sub-district.

6. method according to claim 5 is characterized in that, the said RNTP thresholding that improves said first sub-district and/or second sub-district adjacent with said first sub-district comprises:

The RNTP thresholding that request improves is confirmed in said first sub-district;

The RNTP thresholding that described request improves is sent to Operations, Administration and Maintenance OAM in said first sub-district.

7. method according to claim 6 is characterized in that, the said RNTP thresholding that improves said first sub-district and/or second sub-district adjacent with said first sub-district also comprises:

Said OAM receives the RNTP thresholding from the described request raising of said first sub-district;

Said OAM receives the RNTP thresholding from said second sub-district, and it is one of following that wherein said RNTP thresholding from said second sub-district comprises: the RNTP thresholding that the said second sub-district request improves, the RNTP thresholding of the said current use in second sub-district;

Said OAM receives the RNTP thresholding from four sub-district adjacent with said first sub-district, and it is one of following that wherein said RNTP thresholding from said the 4th sub-district comprises: the RNTP thresholding that said the 4th sub-district request improves, the RNTP thresholding of the said current use in the 4th sub-district;

Only comprise in the adjacent area of said first sub-district under the situation of said second sub-district and said the 4th sub-district, said OAM confirms lower RNTP thresholding among said RNTP thresholding and said RNTP thresholding from said the 4th sub-district from said second sub-district;

Said OAM judges the RNTP thresholding whether said lower RNTP thresholding improves greater than the described request from said first sub-district;

If judged result is for being, then said OAM notifies said first sub-district to use said lower RNTP thresholding.

8. method according to claim 7 is characterized in that, after said OAM notified the said lower RNTP thresholding of said first sub-district use, said method also comprised:

Said lower RNTP thresholding is used in said first sub-district;

It is the transmitting power on zero the PRB that RNTP bitmap meta is improved in said first sub-district.

9. method according to claim 6 is characterized in that, the said RNTP thresholding that improves said first sub-district and/or second sub-district adjacent with said first sub-district also comprises:

Said OAM receives the RNTP thresholding from the described request raising of said second sub-district;

Said OAM receives the RNTP thresholding from five sub-district adjacent with said second sub-district, and it is one of following that wherein said RNTP thresholding from said the 5th sub-district comprises: the RNTP thresholding that said the 5th sub-district request improves, the RNTP thresholding of the said current use in the 5th sub-district;

Only comprise in the adjacent area of said second sub-district under the situation of said first sub-district and said the 5th sub-district; Said OAM confirms lower RNTP thresholding among the said RNTP thresholding and said RNTP thresholding from said the 5th sub-district that improves from the described request of said first sub-district;

Said OAM judges the RNTP thresholding whether said lower RNTP thresholding improves greater than the described request from said second sub-district;

If judged result is for being, then said OAM notifies said second sub-district to use said lower RNTP thresholding.

10. method according to claim 9 is characterized in that, after said OAM notified the said lower RNTP thresholding of said second sub-district use, said method also comprised:

Said lower RNTP thresholding is used in said second sub-district;

It is the transmitting power on zero the PRB that RNTP bitmap meta is improved in said second sub-district.

11. method according to claim 1; It is characterized in that; According to said quantity and predefined quantity thresholding; The RNTP thresholding of adjusting said first sub-district and/or second sub-district adjacent with said first sub-district comprises: be not equal to less than said quantity thresholding and said quantity in said quantity under zero the situation, said first sub-district is added up the quantity of the subscriber equipment of below standard subscriber equipment of QOS in self or Radio Link Failure again.

12., it is characterized in that the quantity of the subscriber equipment of first sub-district through comprising subscriber equipment that QOS in one of the following statistical statistics self is below standard or Radio Link Failure according to each described method in the claim 1 to 11:

From said first sub-district during operation, the cycle statistical of adding up according to the predefined cycle;

When the RNTP of said first sub-district thresholding is adjusted, the incident statistical of adding up according to the predefined cycle.

13. an Inter-Cell Interference Coordination system is characterized in that, comprises first sub-district and second sub-district adjacent with said first sub-district, wherein said first sub-district comprises:

Statistical module is used for adding up the quantity of the subscriber equipment of below standard subscriber equipment of self service quality QOS or Radio Link Failure;

Adjusting module is used for according to said quantity and predefined quantity thresholding, adjusts the narrow emission power indication RNTP thresholding of said first sub-district and/or said second sub-district.