CN102340344B

CN102340344B - Method for avoiding interference between base stations in heterogeneous network, and equipment

Info

Publication number: CN102340344B
Application number: CN201010239641.4A
Authority: CN
Inventors: 朱亚军; 彭莹; 秦飞; 潘学明
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2010-07-27
Filing date: 2010-07-27
Publication date: 2015-03-25
Anticipated expiration: 2030-07-27
Also published as: CN102340344A

Abstract

The invention discloses a method for avoiding an interference between base stations in a heterogeneous network, and equipment. The method comprises: when there is a heterogeneous network that is formed by a low-power base station and a macro base station in a same area, the low-power base station determines a subframe set that needs to carry out transmission restriction; and the low-power base station carries out transmission restriction on a corresponded subframe position according to the subframe set that needs to carry out transmission restriction. According to the invention, a mutual interference between base stations can be avoided by information interaction between the base stations, so that the interference in a heterogeneous network can be effectively reduced.

Description

Interference avoidance method between a kind of base stations in heterogeneous network and equipment

Technical field

The present invention relates to wireless communication field, the interference avoidance method particularly between a kind of base stations in heterogeneous network and equipment.

Background technology

Fig. 1 disturbs scene schematic diagram in heterogeneous network, in heterogeneous network, there is polytype low power nodes as HeNB (Home eNodeB, home evolved base station), PeNB (Pico eNodeB, Pico cell formula evolution base station), FeNB (Femto eNodeB, femtocell evolution base station), relay (relaying) etc.Because the overlap between dissimilar base station covers, and the imbalance on power, the disturbed condition in heterogeneous network is made to become unusual complexity, especially, when for single carrier, disturbed condition when using identical resource between the base station of mutually interference on each channel will be very serious.

In order to reduce mutual interference, a lot of method reducing interference is proposed in current research, wherein use different resources to avoid the method for mutual interference to receive more concern by macro base station in time domain and low power base station, concrete method comprises:

One, mutual interference is avoided by configuration MBSFN (Multicast Broadcast Single Frequency Network, Multicast Broadcast Single Frequency Network) subframe.

Fig. 2 is the schematic diagram that configuration MBSFN sub-frame avoids interference each other, as shown in the figure, interference base station is configured to MBSFN sub-frame in some subframe, in these subframes, interference base station does not pass data on data area, control area only passes CRS (Cell-specific reference signals, the exclusive pilot signal in community) or only passes CRS and necessary control signal; Therefore, the interference that the interfered base station in these subframes is subject to can be less, can dispatch and be disturbed more serious user in these subframe position.

But this method, HARQ (Hybrid Automatic Repeat Request, the mixed automatic repeat request) sequential relationship for FDD (Frequency Division Duplex, FDD) can have a certain impact.In addition, under TDD (Time Division Duplex, time division duplex) system, some uplink-downlink configuration is also to use as configured 0,6, and therefore the use of the method still has certain restriction.

In suc scheme, the sub-frame configuration situation of the MBSFN of mutual Lin Qu is needed between interference base station and interfered base station, the form having defined the MBSFN sub-frame configuration transmitting Lin Qu on X2 mouth at present in the agreement 36.423 of LTE (Long Term Evolution, Long Term Evolution) R9 version is as follows:

Two, mutual interference is avoided by configuration almost blank (accurate blank) subframe

Fig. 3 is the schematic diagram that configuration almost blank subframe avoids interference each other, as shown in the figure, interference base station is configured to almost blank subframe in some subframe, in these subframes, interference base station does not pass data on data area, but in order to keep the compatibility of R8/9 (version 8 or 9), needing to pass CRS, control area only passing CRS or only passes CRS and necessary control signal; Therefore, the interference that the interfered base station in these subframes is subject to can be less, can dispatch and be disturbed more serious user in these subframe position.

Under this approach due in almost blank subframe, the CRS of data area will pass, and therefore the CRS of interference base station also can cause very large interference to the data channel of interfered base station, causes the decline of systematic function.

Can find out, the deficiencies in the prior art are: the time domain approach proposed at present can not solve the interference problem existed in heterogeneous network effectively.

Summary of the invention

Technical problem solved by the invention there are provided interference avoidance method between a kind of base stations in heterogeneous network and equipment, in order to solve the interference problem existed in heterogeneous network in prior art.

Provide the interference avoidance method between a kind of base stations in heterogeneous network in the embodiment of the present invention, comprise the steps:

When the same area exists the heterogeneous network be made up of low power base station and macro base station, low power base station determines the sub-frame set needing to carry out transmitting restriction;

The sub-frame set that low power base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

When the same area exists the heterogeneous network be made up of low power base station and macro base station, macro base station determines the sub-frame set needing to carry out transmitting restriction;

The sub-frame set that macro base station instruction low power base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

When the same area exists the heterogeneous network be made up of low power base station and macro base station, O & M receives needs that low power base station and macro base station report and carries out transmitting the subframe position and number that limit;

O & M carries out transmitting according to the needs that low power base station and macro base station report the subframe position that limits and number determination low power base station needs to carry out transmitting the sub-frame set limited;

O & M indicates low power base station in corresponding subframe position, to carry out transmission restriction according to the sub-frame set that O & M indicates.

The heterogeneous network be made up of low power base station and macro base station is there is at the same area, and the sub-frame configuration that uses of macro base station and low power base station different time, low power base station obtains the ascending-descending subframes configuration of macro base station, or low power base station receives the sub-frame set of macro base station notice;

Low power base station carries out transmission restriction according to the ascending-descending subframes configuration of macro base station, or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies.

There is the heterogeneous network be made up of low power base station and macro base station at the same area, and when the sub-frame configuration that uses of macro base station and low power base station is different, macro base station needs the sub-frame set carrying out transmitting restriction to low power base station notice.

Provide a kind of low power base station in the embodiment of the present invention, comprising:

Determination module, for when the same area exists the heterogeneous network be made up of low power base station and macro base station, determines that low power base station needs the sub-frame set carrying out transmitting restriction;

Limiting module, the sub-frame set for carrying out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

Provide a kind of macro base station in the embodiment of the present invention, comprising:

Determination module, for when the same area exists the heterogeneous network be made up of low power base station and macro base station, determines the sub-frame set needing to carry out transmitting restriction;

Indicating module, be used to indicate low power base station according to described needs carry out transmit restriction sub-frame set carry out in corresponding subframe position transmission limit.

Provide a kind of O & M equipment in the embodiment of the present invention, comprising:

Receiver module, for when the same area exists the heterogeneous network be made up of low power base station and macro base station, receives needs that low power base station and macro base station report and carries out transmitting the subframe position and number that limit;

Determination module, the needs for reporting according to low power base station and macro base station carry out transmitting the subframe position that limits and number determination low power base station needs to carry out transmitting the sub-frame set limited;

Indicating module, is used to indicate low power base station and in corresponding subframe position, carries out transmission restriction according to the sub-frame set of instruction.

Acquisition module, for there is the heterogeneous network be made up of low power base station and macro base station at the same area, and when the sub-frame configuration that uses of macro base station and low power base station is different, obtain the ascending-descending subframes configuration of macro base station, or, receive the sub-frame set of macro base station notice;

Limiting module, carries out transmission restriction for the ascending-descending subframes configuration according to macro base station, or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies.

Determination module, for there is the heterogeneous network be made up of low power base station and macro base station at the same area, determines that whether the sub-frame configuration that macro base station and low power base station use is different;

Notification module, for when the sub-frame configuration determining that macro base station and low power base station use is different, need the sub-frame set carrying out transmitting restriction to low power base station notice low power base station, carry out transmission restriction in order to make low power base station according to the sub-frame set that macro base station notifies.

Determine that interference base station needs the sub-frame set carrying out transmitting restriction;

The sub-frame set that interference base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

The control that interfered base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station.

Provide a kind of base station in the embodiment of the present invention, comprising:

Determination module, for determining that interference base station needs the sub-frame set carrying out transmitting restriction;

Limiting module, for when base station is interference base station, the sub-frame set carrying out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

Control module, for when base station is interfered base station, according to the control that interference base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position.

Beneficial effect of the present invention is as follows:

What propose in the embodiment of the present invention disturbs at heterogeneous system the scheme avoided, and avoids mutual interference problem alternately by the information between base station, can effectively reduce the interference problem in heterogeneous network.

Accompanying drawing explanation

Fig. 1 disturbs scene schematic diagram in heterogeneous network in background technology;

Fig. 2 configures the schematic diagram that MBSFN sub-frame avoids interference each other in background technology;

Fig. 3 configures the schematic diagram that almost blank subframe avoids interference each other in background technology;

Fig. 4 is that the interference avoidance scheme in the embodiment of the present invention between base stations in heterogeneous network implements overall procedure schematic diagram;

Fig. 5 is the interference avoidance method implementing procedure schematic diagram between the base stations in heterogeneous network of low power base station side in the embodiment of the present invention;

Fig. 6 is the interference avoidance method implementing procedure schematic diagram between the base stations in heterogeneous network of macro base station side in the embodiment of the present invention;

Fig. 7 is the interference avoidance method implementing procedure schematic diagram between the base stations in heterogeneous network of O & M side in the embodiment of the present invention;

Fig. 8 is the interference avoidance method implementing procedure schematic diagram between the base stations in heterogeneous network of low power base station side when sub-frame configuration is different in the embodiment of the present invention;

Fig. 9 is the interference avoidance method implementing procedure schematic diagram between the base stations in heterogeneous network of macro base station side when sub-frame configuration is different in the embodiment of the present invention;

Figure 10 is that in the embodiment of the present invention, the interference avoidance method of sub-frame configuration not under same case implements subframe schematic diagram;

Figure 11 is low power base station one structural representation in the embodiment of the present invention;

Figure 12 is macro base station one structural representation in the embodiment of the present invention;

Figure 13 is O & M device structure schematic diagram in the embodiment of the present invention;

Figure 14 is low power base station two structural representation in the embodiment of the present invention;

Figure 15 is macro base station two structural representation in the embodiment of the present invention;

Figure 16 is base station one structural representation in the embodiment of the present invention;

Figure 17 is base station two structural representation in the embodiment of the present invention.

Detailed description of the invention

In the mobile communication network, along with growing to the requirement of data rate and covering, traditional provides the method for access can not meet the demands with macro base station, adopt cell splitting, and can be good at addressing this is that at hot zones or some low power base station of indoor deployment (Home/Pico/Femto/Relay, household base station/Pico cell formula base station/femtocell base station/midsequent base station).This lower powered base station is a kind of base station equipment be applied under family room's environment, working environment or other little overlay environment, and operator can be made to provide the attractive business of more high data rate, more low cost.

But, the introducing of low power base station can cause the interference in system relative to even more serious same layer network, especially the interference problem on control channel, become the bottleneck with the heterogeneous network work under frequency, how to have ensured that the receptivity on each channel is problem demanding prompt solution in a heterogeneous network.Given this, a kind ofly solving in heterogeneous network the scheme disturbed and avoid by providing in the embodiment of the present invention, mutual by information between base station, effectively solving the interference problem existed in heterogeneous network.Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.

In declarative procedure, not only with example, low power base station in heterogeneous network and macro base station can be described, O & M (Operations & Maintenance, Operation and Maintenance) cooperation implement, also will respectively from low power base station and macro base station, the enforcement of O & M is described, but this does not also mean that its person must coordinate enforcement, in fact, when they point come into effect, it also solves low power base station side separately, macro base station side, the problem of O & M equipment side, when just they are combined, better technique effect can be obtained.

For ease of understanding technical scheme provided by the invention on the whole, first will be introduced on the whole.

Fig. 4 is that the interference avoidance scheme between base stations in heterogeneous network implements overall procedure schematic diagram, as shown in the figure, can comprise the steps: when interference is avoided

Step 401, judge that whether low power base station is identical with macro base station sub-frame configuration, be proceed to step 402, otherwise proceed to step 403;

Step 402, according to mutual information determine low power base station need carry out transmit restriction sub-frame set, proceed to step 404;

Between step 403, low power base station, autonomous decision or macro base station determine the sub-frame set needing to carry out transmitting restriction, proceed to step 404;

Step 404, low power base station are carried out corresponding transmission to macro base station according to sub-frame set and are limited, and proceed to step 405;

Step 405, judge whether need adjustment carry out transmit restriction sub-frame set, be proceed to step 402.

For the enforcement of step 401, when whether the sub-frame configuration judging that macro base station and low power base station use is the same, for FDD system, then the sub-frame configuration of macro base station and low power base station is duplicate; For TDD system, if there is X2 interface between macro base station and low power base station, then this information can obtain when setting up X2 interface, if when there is not X2 interface between macro base station and low power base station, can by the ascending-descending subframes configuration obtaining the other side alternately of information, through but not limited to the interface supported as S1 mouth, can eating dishes without rice or wine, just can carry out the whether identical judgement of sub-frame configuration after acquisition alternately of information.

As seen from Figure 4, if the sub-frame configuration that macro base station and low power base station use is identical, enters step 402, if macro base station and the sub-frame configuration that low power base station uses are not identical, so enter step 403.In declarative procedure below, the enforcement respectively by this two schemes is described.That is: low power base station judges that whether the sub-frame configuration that macro base station and low power base station use is the same; Time the same, low power base station determines the sub-frame set needing to carry out transmitting restriction, and time different, low power base station carries out transmission restriction according to the ascending-descending subframes configuration of macro base station or the sub-frame set of macro base station notice.

One, macro base station is identical with the sub-frame configuration that low power base station uses.

In enforcement, if the sub-frame configuration that macro base station and low power base station use is identical, so can be decided the sub-frame set needing the restriction transmitted as the low power base station of interference base station by the information interaction between base station.Here, the sub-frame set of decision refers to the subframe position (as the MBSFN sub-frame of configuration, a1most blank subframe, or MBSFN sub-frame and almost blank subframe such as to exist at the situation simultaneously) that interference base station needs the restriction transmitted.Restriction in transmission refers to that interference base station limits its particular channel in some subframe position, the transmission of signal or carry out particular channel in whole subframe or subframe, and the adjustment in signal power is to avoid the transmission for disturbed system in this subframe.Also be, corresponding subframe position is carried out transmission restriction, can refer to that low power base station limits its particular channel in this subframe position, the transmission of signal or carry out particular channel in whole subframe or subframe, the adjustment in signal power is to avoid the transmission to macro base station in this subframe.

Interference between the base stations in heterogeneous network of 1, low power base station side is avoided.

Fig. 5 is the interference avoidance method implementing procedure schematic diagram between the base stations in heterogeneous network of low power base station side, and as shown in the figure, low power base station can comprise the steps: when carrying out interference and avoiding

Step 501, when the same area exists the heterogeneous network be made up of low power base station and macro base station, low power base station determines to need the sub-frame set carrying out transmitting restriction;

The sub-frame set that step 502, low power base station carry out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

In enforcement, low power base station determines the sub-frame set needing to carry out transmitting restriction, can comprise with one of under type or its combination:

Low power base station is after the subframe position of carrying out transmitting restriction to macro base station notice low power base station and number, and low power base station determines the sub-frame set needing to carry out transmitting restriction according to the sub-frame set that macro base station feeds back; (referring to following embodiment one)

Low power base station determines the sub-frame set needing to carry out transmitting restriction according to the sub-frame set that macro base station indicates; (referring to following embodiment two)

Low power base station determines to need the sub-frame set carrying out transmitting restriction according to the sub-frame set that O & M indicates, to be O & M according to the needs that low power base station and macro base station report carry out transmitting the subframe position that limits to the sub-frame set that O & M indicates and number is determined; (referring to following embodiment three)

Low power base station needs the subframe position carrying out transmitting restriction and number to determine to need the sub-frame set carrying out transmitting restriction according to each low power base station; (referring to following embodiment four)

Low power base station needs the subframe position carrying out transmitting restriction and number to determine to need the sub-frame set carrying out transmitting restriction according to this low power base station.(referring to following embodiment five)

Interference between the base stations in heterogeneous network of 2, macro base station side is avoided.

Fig. 6 is the interference avoidance method implementing procedure schematic diagram between the base stations in heterogeneous network of macro base station side, and as shown in the figure, macro base station can comprise the steps: when carrying out interference and avoiding

Step 601, when the same area exists the heterogeneous network be made up of low power base station and macro base station, macro base station determines to need the sub-frame set carrying out transmitting restriction;

The sub-frame set that step 602, macro base station instruction low power base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

In enforcement, the sub-frame set that macro base station instruction low power base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position, can comprise:

After low power base station notifies the subframe position that low power base station carries out transmitting restriction and number to macro base station, macro base station needs the sub-frame set carrying out transmitting restriction to low power base station feedback, and the sub-frame set indicating low power base station to carry out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.(referring to following embodiment one)

Macro base station sends the sub-frame set needing to carry out transmitting restriction to low power base station, and the sub-frame set indicating low power base station to carry out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.(referring to following embodiment two)

Interference between the base stations in heterogeneous network of 3, O & M side is avoided.

Fig. 7 is the interference avoidance method implementing procedure schematic diagram between the base stations in heterogeneous network of O & M side, and as shown in the figure, O & M can comprise the steps: when carrying out interference and avoiding

Step 701, when the same area exists the heterogeneous network be made up of low power base station and macro base station, O & M receives needs that low power base station and macro base station report and carries out transmitting the subframe position and number that limit;

Step 702, O & M carry out transmitting according to the needs that low power base station and macro base station report the subframe position that limits and number determination low power base station needs to carry out transmitting the sub-frame set limited;

Step 703, O & M indicate low power base station in corresponding subframe position, to carry out transmission restriction according to the sub-frame set that O & M indicates.

In order to better understand the enforcement of such scheme, can understand from centralized management and distributed management two kinds of thinkings, being described below by concrete example.

One), centralized management thinking.

Embodiment one:

The scene that the femtocell base station (Femto base station: FeNB) that there is macro base station (MeNB) and covering hot zones for the same area coexists, MeNB and FeNB uses identical carrier wave, under this scene, EVAC is FeNB, and disturbed system is MeNB.

Step one, multiple FeNB by support interface (such as S1 interface, or the interface of the other types supported in later release), eat dishes without rice or wine or by O & M alternately give MeNB can carry out transmit restriction sub-frame set.

In enforcement, can by indicate sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8 between base station.

In concrete enforcement, each FeNB according to the quantity of the user of own services, business demand or can consider aspects such as the disturbed conditions of MUE (macro base station service subscriber equipment), determines the subframe position carrying out transmitting restriction and number.

After step 2, MeNB receive these information, the business demand being disturbed user in the subscriber equipment according to oneself service determines a sub-frame set, and by this information by the interface supported, eat dishes without rice or wine or by O & M alternately to FeNB.In this step, determine sub-frame set according to determining according to aspects such as being subject to the quantity of MUE of FeNB interference and business demand,

In enforcement, MeNB obtains after the quantity of MUE that is subject to FeNB interference and the mode of the information of business demand can be reported in the measurement by MUE or be obtained by the measurement of HeNB, alternately to MeNB etc.

Step 3, each Femto base station, according to the sub-frame set obtained in step 2, corresponding subframe position are carried out transmission restriction.

Embodiment two:

The scene that the femtocell base station (Femto base station: FeNB) that there is macro base station (MeNB) and covering hot zones for the same area coexists, MeNB and FeNB uses identical carrier wave, under this scene, EVAC is FeNB, and disturbed system is MeNB:

Step one, MeNB according to the business demand being disturbed user in the user oneself served determine one require FeNB carry out transmit restriction sub-frame set, and by this information by support interface, eat dishes without rice or wine or by O & M alternately give FeNB.

In enforcement, MeNB determine sub-frame set according to deciding according to aspects such as being subject to the quantity of MUE of HeNB interference and business demand.

Step 2, each Femto base station, according to the sub-frame set obtained in step one, corresponding subframe position are carried out transmission and are controlled.

Embodiment three:

According to the business demand being disturbed user in the user oneself served, step one, MeNB determine that one requires that FeNB carries out transmitting the sub-frame set of restriction, and by this information interaction to O & M.

Step 2, each FeNB can according to the quantity of the user of own services, and business demand or the aspect such as disturbed condition for MUE are considered, determine the subframe position carrying out transmitting restriction and number.And by this information interaction to O & M.

Step 3, O & M are centralized determines that needs carry out transmitting the sub-frame set of restriction and this information is handed down to MeNB and each FeNB.

In enforcement, it is a lot of according to having that O & M determines, such as considers the interference of MUE, or the business demand etc. of FUE.

Step 4, each FeNB are according to the subframe position obtained in step 3 being carried out transmission restriction.

Two), distributed idea in management.

Embodiment four:

Step one, each FeNB can according to the quantity of the user of own services, business demand or the aspect such as disturbed condition of MUE is considered, determine the subframe position and the number that self carry out transmission restriction, and mutual by information between FeNB, determine the sub-frame set that can be carried out transmitting restriction.

In enforcement, the foundation of decision can have multiple, and the sub-frame set such as choosing the maximum FeNB of siding stopping frame number carries out transmitting the sub-frame set of restriction as all FeNB.

Step 2, FeNB by support interface (S1 interface, or the interface of the other types supported in later release), eat dishes without rice or wine or by O & M in step one obtain sub-frame set alternately give MeNB.

Step 3, each FeNB, according to the sub-frame set obtained in step one, corresponding subframe position are carried out transmission restriction.

Embodiment five:

Step one, each FeNB can according to the quantity of the user of own services, and business demand or the aspect such as disturbed condition for MUE are considered, determine the subframe position self carrying out transmitting restriction and number.

In enforcement, the sub-frame set that each FeNB carries out transmitting restriction may be different.

Step 2, each FeNB by support interface (S1 interface, or the interface of the other types supported in later release), eat dishes without rice or wine or by O & M in step one obtain sub-frame set alternately give MeNB.

In above-mentioned enforcement, between base station information alternately can by the interface (interface etc. of other types as supported in X2 mouth, S1 mouth or later release) supported, eat dishes without rice or wine, or come mutual by modes such as O & M.

The specifically mutual form of the sub-frame set transmitting restriction is carried out for the interference base station that needs mutual between base station, can through but not limited to following mode: as the mode by the configuration of X2 oral sex Hu Lin district MBSFN sub-frame in the method for bitmap (bit mapping) or multiplexing LTER8, be illustrated with concrete example below:

Embodiment six:

Need the subframe position of carrying out transmitting restriction for subframe 0,4,7 for interference base station in certain radio frames, so to indicate in this radio frames interference base station on subframe 0,4,7 position to need the restriction transmitted by the mode 1000100100 of bitmap.

It should be noted that mutual information can be not only for a radio frames, also can be comprise the subframe position multiple radio frames needing carry out transmitting restriction.

In concrete interactive mode, in enforcement can in the cycle mutual or trigger-type mutual in option and installment trigger-type mutual when changing, namely trigger when the sub-frame set needing adjustment restriction transmission.

Also namely, low power base station is determined to need the sub-frame set carrying out transmitting restriction can be carry out determining when the sub-frame set of needs adjustment restriction transmission.And/or grand power base station is determined to need the sub-frame set carrying out transmitting restriction can be carry out determining when the sub-frame set of needs adjustment restriction transmission.

Two, macro base station is not identical with the sub-frame configuration that low power base station uses.

If the sub-frame configuration that MeNB and low power base station use is different, so low power base station can the restriction transmitted of autonomous carrying out or needed the sub-frame set carrying out transmitting restriction by the decision that macro base station is centralized.

Fig. 8 be sub-frame configuration different time low power base station side base stations in heterogeneous network between interference avoidance method implementing procedure schematic diagram, as shown in the figure, can comprise the steps:

Step 801, there is the heterogeneous network be made up of low power base station and macro base station at the same area, and the sub-frame configuration that uses of macro base station and low power base station different time, low power base station obtains the ascending-descending subframes configuration of macro base station, or low power base station receives the sub-frame set of macro base station notice;

Step 802, low power base station carry out transmission restriction according to the ascending-descending subframes configuration of macro base station, or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies.

In enforcement, low power base station judges that whether the sub-frame configuration that macro base station and low power base station use is the same; Time the same, low power base station determines the sub-frame set needing to carry out transmitting restriction, and time different, low power base station carries out transmission restriction according to the ascending-descending subframes configuration of macro base station, or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies.

Concrete, low power base station carries out transmission restriction, can comprise with one of under type or its combination:

Low power base station carries out transmission restriction according to the ascending-descending subframes configuration of macro base station; (referring to following embodiment seven)

The sub-frame set that low power base station notifies at macro base station is carried out transmission restriction.(referring to following embodiment eight)

In enforcement, low power base station carries out transmission restriction according to the configuration of the ascending-descending subframes of macro base station, can refer to carry out transmitting restriction ascending-descending subframes do not dispatch transmission upstream data or Modulating Power or only pass the CRS of control area and the control information of necessity or only pass control area CRS to avoid the interference to macro base station.

Fig. 9 be sub-frame configuration different time macro base station side base stations in heterogeneous network between interference avoidance method implementing procedure schematic diagram, as shown in the figure, can comprise the steps:

Step 901, there is the heterogeneous network be made up of low power base station and macro base station at the same area, and when the sub-frame configuration that uses of macro base station and low power base station is different, macro base station determines the sub-frame set needing to carry out transmitting restriction;

Step 902, macro base station need the sub-frame set carrying out transmitting restriction to low power base station notice, carry out transmission restriction in order to make low power base station according to the sub-frame set that macro base station notifies.

In enforcement, macro base station judges that whether the sub-frame configuration that macro base station and low power base station use is the same; Time different, macro base station needs the sub-frame set carrying out transmitting restriction to low power base station notice, carries out transmission restriction in order to the sub-frame set making low power base station carry out transmitting restriction according to the needs that macro base station notifies.

Be illustrated with specific embodiment below:

Embodiment seven:

Figure 10 is that the interference avoidance method of sub-frame configuration not under same case implements subframe schematic diagram, and in figure, D is descending sub frame, and U is sub-frame of uplink, and S is special subframe; Then as shown in the figure, TDD sub-frame configuration 1 is used with FeNB, MeNB uses TDD sub-frame configuration 2 to be example, from step 401, MeNB and FeNB can obtain the ascending-descending subframes configuration of the other side, so FeNB can carry out in the subframe different from macro base station transmission restriction (in the subframe 3 namely in Figure 10), do not dispatch above transmission any upstream data or by the adjustment on power to avoid interference.And MeNB can dispatch and is subject to the larger MUE of FeNB interference ratio in subframe 3.

Embodiment eight:

MeNB and FeNB can obtain the ascending-descending subframes configuration of the other side, macro base station can by centralized control, according to the demand being disturbed user, notify, in subframes different from oneself in the sub-frame configuration that each FeNB uses at FeNB, to carry out or do not carry out transmission restriction.

In enforcement, the needs that interference base station obtains in step 402,403 carry out transmitting restriction that the subframe position of restriction is transmitted (as this subframe position being be configured to almost blank subframe, so interference base station only transmits CRS in this subframe, does not transmit other data message or only transmits necessary control information) to reduce the interference for interfered base station.Interfered base station scheduling can be subject to strongly disturbing user in the subframe position that interference base station carries out transmission restriction.Illustrate with specific embodiment below.

Embodiment nine:

Femto base station is obtaining the sub-frame set needing to carry out transmitting restriction from step 402,403.Needing in the sub-frame set carrying out transmitting restriction, FeNB is configured to MBSFN sub-frame in some subframe position, represents with S1; FeNB can be configured to almost blank subframe in other subframe position, represents with S2.In subframe position in S1, the CRS that FeNB only passes the CRS of control area and necessary control information or only passes control area is to avoid the interference for Macro system; In subframe position in S2, FeNB only passes CRS and necessary control information or only passes CRS to avoid the interference for Macro system.

Meanwhile, the FeNB that obtains in step 402,403 of MeNB needs (S1+S2) in the sub-frame set carrying out transmitting restriction to dispatch to be subject to the more serious MUE of FeNB interference ratio.

Same, the subframe position that interference base station also can be determined in step 402,403 is carried out restriction that adjustment on power or the mode of configuration empty frame transmit to avoid interference, here just do not detail one by one.

In enforcement, for whether triggered step 405 judges whether to need adjustment to carry out transmitting the sub-frame set of restriction, this process can be periodically judge or the judgement that event triggers, as changes such as Macro system or the business demands of low power system, if judge needs adjustment, so enter step 402.Be described with concrete example below:

Embodiment ten:

According to step 401,402,404, the restriction that Femto system is transmitted in the sub-frame set determined, can be worked in the sub-frame set that FeNB carries out transmitting restriction by the MUE that FeNB disturbs, if quantity or the portfolio of the MUE be disturbed decrease, so now macro base station can trigger the sub-frame set that an adjustment carries out transmitting restriction, reduce the number of sub frames that FeNB carries out transmitting restriction, get back to step 402, determination FeNB again needs the sub-frame set carrying out transmitting restriction.

Embodiment 11:

Business due to Femto system has tidal effect (as possibility business demand is less by day, and the business demand amount of period such as grade is more between the lights), therefore Femto needs the change of sub-frame set carrying out transmitting restriction to be the change that can have certain rule, therefore Femto can according to the process of pre-planning, and periodically the sub-frame set transmitting restriction is carried out in adjustment.

Embodiment 12:

According to step 401,402,404, the restriction that Femto system is transmitted in the sub-frame set determined, can be worked in the sub-frame set that FeNB carries out transmitting restriction by the MUE that FeNB disturbs, if FeNB service user number or business demand there occurs change, so now FeNB can trigger the sub-frame set that adjustment carries out transmitting restriction, increase or reduce the number of sub frames carrying out transmitting restriction, get back to step 402, redefine the sub-frame set that FeNB needs to carry out transmitting restriction.

In above-mentioned implementation process, be described for Femto system, now, macro base station is as interfered base station, but when low power base station is Pico system, then macro base station is as interference base station, and PeNB is interfered base station, therefore, when low power base station is different, interference base station and interfered base station are different, therefore, will whether being that interference base station and interfered base station are described in the following examples.

With in the declarative procedure that be whether interference base station and interfered base station is visual angle, because its principle is consistent with above-described embodiment, therefore can see above-described embodiment in implementing, those skilled in the art also easily should understand that low power base station and macro base station are now interference base stations under the description of which, or interfered base station.

From interference base station, during the interference avoidance method between base stations in heterogeneous network is implemented, Ke Yishi:

Determine that interference base station needs the sub-frame set carrying out transmitting restriction; The sub-frame set that interference base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

In enforcement, determine that interference base station needs the sub-frame set carrying out transmitting restriction, can comprise:

By information determine alternately interference base station need carry out transmit restriction sub-frame set.

In enforcement, by information determine alternately interference base station need carry out transmit restriction sub-frame set, can comprise:

Wireline interface or air interface that described information mutual can be supported by base station or undertaken alternately by O & M.

In enforcement, can comprising alternately of described information: interference base station carries out the sub-frame set transmitting restriction, and/or interfered base station expects that interference base station carries out transmitting the sub-frame set of restriction.

In enforcement, the mutual form of described information can be by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTER8.

In centralized management, according to the instruction of central control unit, interference base station determines that described needs carry out transmitting the sub-frame set of restriction; Or,

In distributed management, interference base station independently determines the sub-frame set needing to carry out transmitting restriction.

Concrete, central control unit can adopt existing functional entity in force, as O & M, also can adopt the functional entity device newly established, as long as the equipment that can carry out the integrated treatment of sub-frame set multilevel iudge can realize.

In enforcement, in centralized management, according to the instruction of central control unit, described interference base station determines that described needs carry out transmitting the sub-frame set of restriction, can comprise:

Interference base station is after can carrying out the sub-frame set of transmission restriction to centerized fusion unit notice interference base station, and the sub-frame set that interference base station feeds back according to centerized fusion unit, determines that this set is the sub-frame set needing to carry out transmitting restriction;

Or the sub-frame set that interference base station indicates according to centerized fusion unit, determines that this set is the sub-frame set that it needs to carry out transmitting restriction;

Or, the sub-frame set that interference base station indicates according to O & M, determine that this set is the sub-frame set that it needs to carry out transmitting restriction, the sub-frame set that O & M the indicates sub-frame set can carrying out transmitting restriction that to be O & M report according to interference base station and the expectation interference base station that interfered base station reports carry out transmitting the sub-frame set limited and determine.

In enforcement, in distributed management, described interference base station independently determines the sub-frame set needing to carry out transmitting restriction, can comprise:

Interference base station carries out according to the mutual interference base station of the expectation that mutual interference base station is mutual the sub-frame set transmitting restriction, and autonomous determination needs it to carry out transmitting the sub-frame set of restriction;

Or interference base station carries out according to the expectation interference base station that interfered base station is mutual the sub-frame set transmitting restriction, autonomous determination needs it to carry out transmitting the sub-frame set of restriction.

In enforcement, the sub-frame set that interference base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position, refer to that interference base station limits the transmission of its particular channel or signal in this subframe position, or carry out whole subframe, or the adjustment in subframe in particular channel or signal power is to avoid the interference to interfered base station in this subframe.

In enforcement, can further include:

By the information of the mutual use sub-frame configuration of interfered base station, interference base station judges that whether interference base station is the same with the sub-frame configuration that interfered base station base station uses;

In enforcement, the information of the use sub-frame configuration that interfered base station is mutual can be by base station between wireline interface or eat dishes without rice or wine, or mutual by O & M.

From interfered base station, during the interference avoidance method between base stations in heterogeneous network is implemented, Ke Yishi:

Determine that interference base station needs the sub-frame set carrying out transmitting restriction; The control that interfered base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station.

In enforcement, the control that interfered base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station, can comprise:

In centralized management, according to the instruction of described central control unit, interfered base station determines that described interference base station needs the sub-frame set carrying out transmitting restriction; Or,

In distributed management, according to the instruction of interference base station, interfered base station determines that interference base station needs the sub-frame set carrying out transmitting restriction.

In enforcement, in centralized management, according to the instruction of described central control unit, interfered base station determines that described interference base station needs the sub-frame set carrying out transmitting restriction, can comprise:

To centerized fusion unit notice, interfered base station is after expecting that interference base station carries out transmitting the sub-frame set of restriction, the sub-frame set that interfered base station feeds back according to centerized fusion unit, determines in this set to be need to carry out transmitting the sub-frame set controlled;

Or the sub-frame set that interfered base station indicates according to centerized fusion unit, determine the control transmitted in this sub-frame set;

Or the sub-frame set that interfered base station indicates according to O & M, determine the control transmitted in this sub-frame set, the sub-frame set that O & M the indicates sub-frame set can carrying out transmitting restriction that to be O & M report according to interference base station and the expectation interference base station that interfered base station reports carry out transmitting the sub-frame set limited and determine.

In enforcement, the instruction of information can be the wireline interface or air interface or mutual by O & M supported by base station.

In enforcement, the control that interfered base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station, can to refer to that in this subframe position interfered base station can be dispatched and be disturbed the transmission that the base station larger service-user of interference carries out data.

Based on same inventive concept, low power base station, macro base station, O & M equipment is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to these equipment is similar to the interference avoidance method between base stations in heterogeneous network, therefore the enforcement of these equipment see the enforcement of method, can repeat part and repeats no more.

Figure 11 is low power base station one structural representation, as shown in the figure, can comprise in low power base station:

Determination module 1101, for when the same area exists the heterogeneous network be made up of low power base station and macro base station, determines that low power base station needs the sub-frame set carrying out transmitting restriction;

Limiting module 1102, the sub-frame set for carrying out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

In enforcement, determination module can comprise with the unit of one of under type or its combination:

First determining unit, for after the subframe position of carrying out transmitting restriction to macro base station notice low power base station and number, determines the sub-frame set needing to carry out transmitting restriction according to the sub-frame set of macro base station feedback;

Second determining unit, the sub-frame set for indicating according to macro base station determines the sub-frame set needing to carry out transmitting restriction;

3rd determining unit, sub-frame set for indicating according to O & M determines to need the sub-frame set carrying out transmitting restriction, and to be O & M according to the needs that low power base station and macro base station report carry out transmitting the subframe position that limits to the sub-frame set that O & M indicates and number is determined;

4th determining unit, subframe position and number for carrying out transmission restriction according to each low power base station needs determine the sub-frame set needing to carry out transmitting restriction;

5th determining unit, subframe position and number for carrying out transmission restriction according to this low power base station needs determine the sub-frame set needing to carry out transmitting restriction.

In enforcement, determination module can be further used for the sub-frame set determining when the sub-frame set needing adjustment restriction transmission to need to carry out transmitting restriction.

In enforcement, determination module can also be further used for the wireline interface that can be supported by base station or air interface or be needed the sub-frame set carrying out transmitting restriction by O & M alternately.

In enforcement, determination module can be further used for by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8.

In enforcement, when limiting module can be further used for carrying out transmission restriction in corresponding subframe position, refer to and in this subframe position, to limit low power base station particular channel, the transmission of signal or the adjustment carried out in whole subframe or subframe in particular channel, signal power to avoid the transmission to macro base station in this subframe.

In enforcement, low power base station can further include:

Whether judge module 1103 is the same for judging the sub-frame configuration that macro base station and low power base station use;

Then, limiting module can also be further used for when different, and transmission restriction is carried out in the ascending-descending subframes configuration according to macro base station, or carries out transmission restriction according to the sub-frame set notified at macro base station.

In enforcement, limiting module can be further used for when carrying out transmission restriction according to the configuration of the ascending-descending subframes of macro base station, refer to carry out transmitting restriction ascending-descending subframes do not dispatch transmission upstream data or Modulating Power or only pass the CRS of control area and the control information of necessity or only pass control area CRS to avoid the interference to macro base station.

Figure 12 is macro base station one structural representation, as shown in the figure, can comprise in macro base station:

Determination module 1201, for when the same area exists the heterogeneous network be made up of low power base station and macro base station, determines the sub-frame set needing to carry out transmitting restriction;

Indicating module 1202, be used to indicate low power base station according to described needs carry out transmit restriction sub-frame set carry out in corresponding subframe position transmission limit.

In enforcement, indicating module can be further used for after low power base station notifies the subframe position that low power base station carries out transmitting restriction and number to macro base station, need the sub-frame set carrying out transmitting restriction to low power base station feedback, and the sub-frame set indicating low power base station to carry out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position; Or macro base station sends the sub-frame set needing to carry out transmitting restriction to low power base station, the sub-frame set that instruction low power base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

In enforcement, indicating module can also be further used for the wireline interface that can be supported by base station or air interface or be indicated the sub-frame set needing to carry out transmitting restriction by O & M.

In enforcement, indicating module can also be further used for by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8.

In enforcement, can further include in macro base station:

Whether judge module 1203 is the same for judging the sub-frame configuration that macro base station and low power base station use;

Notification module 1204, for when different, needs the sub-frame set carrying out transmitting restriction to low power base station notice, carry out transmission restriction in order to make low power base station according to the sub-frame set that macro base station notifies.

Figure 13 is O & M device structure schematic diagram, as shown in the figure, can comprise in O & M equipment:

Receiver module 1301, for when the same area exists the heterogeneous network be made up of low power base station and macro base station, receives needs that low power base station and macro base station report and carries out transmitting the subframe position and number that limit;

Determination module 1302, the needs for reporting according to low power base station and macro base station carry out transmitting the subframe position that limits and number determination low power base station needs to carry out transmitting the sub-frame set limited;

Indicating module 1303, is used to indicate low power base station and in corresponding subframe position, carries out transmission restriction according to the sub-frame set of instruction.

Figure 14 is low power base station two structural representation, as shown in the figure, can comprise in low power base station:

Acquisition module 1401, for there is the heterogeneous network be made up of low power base station and macro base station at the same area, and when the sub-frame configuration that uses of macro base station and low power base station is different, obtain the ascending-descending subframes configuration of macro base station, or, receive the sub-frame set of macro base station notice;

Limiting module 1402, carries out transmission restriction for the ascending-descending subframes configuration according to macro base station, or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies.

Figure 15 is macro base station two structural representation, as shown in the figure, can comprise in macro base station:

Determination module 1501, for there is the heterogeneous network be made up of low power base station and macro base station at the same area, determines that whether the sub-frame configuration that macro base station and low power base station use is different;

Notification module 1502, for when the sub-frame configuration determining that macro base station and low power base station use is different, need the sub-frame set carrying out transmitting restriction to low power base station notice low power base station, carry out transmission restriction in order to make low power base station according to the ascending-descending subframes configuration of macro base station.

Figure 16 is base station one structural representation, and as shown in the figure, base station can comprise:

Determination module 1601, for determining that interference base station needs the sub-frame set carrying out transmitting restriction;

Limiting module 1602, for when base station is interference base station, the sub-frame set carrying out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position.

In enforcement, determination module can also be further used for determine interference base station need carry out transmit restriction sub-frame set time, by information determine alternately interference base station need carry out transmit restriction sub-frame set.

In enforcement, determination module can also be further used for by information determine that interference base station needs the sub-frame set of carrying out transmitting restriction alternately time, the wireline interface can supported by base station or air interface or undertaken alternately by O & M.

In enforcement, determination module can also be further used for comprising the sub-frame set that interference base station carries out transmitting restriction alternately, and/or interfered base station expects that interference base station carries out the information of the sub-frame set transmitting restriction.

In enforcement, determination module can also be further used for when information interaction, by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTER8.

In enforcement, determination module can comprise the first determining unit and/or the second determining unit, wherein:

According to the instruction of central control unit, first determining unit, in centralized management, determines that described needs carry out transmitting the sub-frame set of restriction;

Second determining unit, in distributed management, independently determines the sub-frame set needing to carry out transmitting restriction.

In enforcement, the first determining unit can be further used in centralized management, determines that described needs carry out transmitting the sub-frame set of restriction, comprising according to the instruction of central control unit:

In enforcement, the second determining unit can be further used in distributed management, independently determines the sub-frame set needing to carry out transmitting restriction, comprising:

In enforcement, the sub-frame set that limiting module can be further used for carrying out transmitting according to described needs restriction carries out transmission restriction in corresponding subframe position, refer to that interference base station limits the transmission of its particular channel or signal in this subframe position, or carry out whole subframe, or the adjustment in subframe in particular channel or signal power is to avoid the interference to interfered base station in this subframe.

In enforcement, base station may further include:

By the information of the mutual use sub-frame configuration of interfered base station, judge module, for judging that whether interference base station is the same with the sub-frame configuration that interfered base station base station uses;

Figure 17 is base station two structural representation, and as shown in the figure, base station can comprise:

Determination module 1701, for determining that interference base station needs the sub-frame set carrying out transmitting restriction;

Control module 1702, for when base station is interfered base station, according to the control that interference base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position.

In enforcement, control module can comprise the first control unit and/or the second control unit, wherein:

According to the instruction of described central control unit, first control unit, in centralized management, determines that described interference base station needs the sub-frame set carrying out transmitting restriction; Or,

According to the instruction of interference base station, second control unit, in distributed management, determines that interference base station needs the sub-frame set carrying out transmitting restriction.

In enforcement, the first control unit can be further used in centralized management, and according to the instruction of described central control unit, interfered base station determines that described interference base station needs the sub-frame set carrying out transmitting restriction, comprising:

In enforcement, control module can be further used for the control needing the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station, to refer to that in this subframe position interfered base station can be dispatched and is disturbed the transmission that the base station larger service-user of interference carries out data.

For convenience of description, each several part of the above device is divided into various module or unit to describe respectively with function.Certainly, the function of each module or unit can be realized in same or multiple software or hardware when implementing of the present invention.

From above-mentioned enforcement, the technical scheme that the embodiment of the present invention provides considers in heterogeneous network, due to the introducing of dissimilar low power base station, causes the problem that the interference problem in heterogeneous system becomes more serious.Interference problem when using identical carrier wave between the base station especially for mutually interference.Thus the scheme avoided interference alternately by information between base station is proposed, concrete:

Can need by the mutual acquisition interference base station of information the sub-frame set that carry out transmitting restriction, the interference that then interference base station needs the restriction transmitted to avoid for interfered base station in these subframe position between base station.

Further, mode and the content of base station information interaction is additionally provided in enforcement;

Further, the mode that centralized or distributed acquisition interference base station needs to carry out the sub-frame set transmitting restriction is additionally provided in enforcement.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. the interference avoidance method between base stations in heterogeneous network, is characterized in that, comprises the steps:

The sub-frame set that low power base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position;

Wherein, described carry out in corresponding subframe position transmission restriction, refer to that low power base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to macro base station in this subframe; Low power base station determines the sub-frame set needing to carry out transmitting restriction, comprise with one of under type or its combination: low power base station is after the subframe position of carrying out transmitting restriction to macro base station notice low power base station and number, and low power base station determines the sub-frame set needing to carry out transmitting restriction according to the sub-frame set that macro base station feeds back; Low power base station determines the sub-frame set needing to carry out transmitting restriction according to the sub-frame set that macro base station indicates; Low power base station determines to need the sub-frame set carrying out transmitting restriction according to the sub-frame set that Operation and Maintenance O & M indicates, to be O & M according to the needs that low power base station and macro base station report carry out transmitting the subframe position that limits to the sub-frame set that O & M indicates and number is determined; Low power base station needs the subframe position carrying out transmitting restriction and number to determine to need the sub-frame set carrying out transmitting restriction according to each low power base station; Low power base station needs the subframe position carrying out transmitting restriction and number to determine to need the sub-frame set carrying out transmitting restriction according to this low power base station.

2. the method for claim 1, is characterized in that, the wireline interface can supported by base station between base station or air interface or needed the sub-frame set carrying out transmitting restriction by O & M alternately.

3. the method for claim 1, is characterized in that, by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8 between base station.

4. the method as described in as arbitrary in claims 1 to 3, is characterized in that, comprise further:

Low power base station judges that whether the sub-frame configuration that macro base station and low power base station use is the same;

Time the same, low power base station determines the sub-frame set needing to carry out transmitting restriction, and time different, low power base station carries out transmission restriction according to the ascending-descending subframes configuration of macro base station; Or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies.

5. method as claimed in claim 4, it is characterized in that, low power base station carries out transmission restriction according to the configuration of the ascending-descending subframes of macro base station, refer to carry out transmitting restriction ascending-descending subframes do not dispatch transmission upstream data or Modulating Power or only pass the exclusive pilot signal CRS in community of control area and the control information of necessity or only pass control area CRS to avoid the interference to macro base station.

6. the interference avoidance method between base stations in heterogeneous network, is characterized in that, comprises the steps:

After low power base station notifies the subframe position that low power base station carries out transmitting restriction and number to macro base station, macro base station needs the sub-frame set carrying out transmitting restriction to low power base station feedback, and the sub-frame set indicating low power base station to carry out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position;

Or macro base station sends the sub-frame set needing to carry out transmitting restriction to low power base station, the sub-frame set that instruction low power base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position;

Wherein, described carry out in corresponding subframe position transmission restriction, refer to that low power base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to macro base station in this subframe.

7. method as claimed in claim 6, is characterized in that, the wireline interface can supported by base station between base station or air interface or needed the sub-frame set carrying out transmitting restriction by O & M alternately.

8. method as claimed in claim 6, is characterized in that, by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8 between base station.

9. the method as described in as arbitrary in claim 6 to 8, is characterized in that, comprise further:

Macro base station judges that whether the sub-frame configuration that macro base station and low power base station use is the same;

Time different, macro base station needs the sub-frame set carrying out transmitting restriction to low power base station notice.

10. the interference avoidance method between base stations in heterogeneous network, is characterized in that, comprises the steps:

O & M indicates low power base station in corresponding subframe position, to carry out transmission restriction according to the sub-frame set that O & M indicates;

Interference avoidance method between 11. 1 kinds of base stations in heterogeneous networks, is characterized in that, comprise the steps:

Low power base station carries out transmission restriction according to the ascending-descending subframes configuration of macro base station, or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies in corresponding subframe position;

Wherein, described low power base station carries out transmission restriction according to the configuration of the ascending-descending subframes of macro base station, refer to carry out transmitting restriction ascending-descending subframes do not dispatch transmission upstream data or Modulating Power or only pass the exclusive pilot signal CRS in community of control area and the control information of necessity or only pass control area CRS to avoid the interference to macro base station; Described carry out in corresponding subframe position transmission restriction, refer to that low power base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to macro base station in this subframe.

Interference avoidance method between 12. 1 kinds of base stations in heterogeneous networks, is characterized in that, comprise the steps:

The heterogeneous network be made up of low power base station and macro base station is there is at the same area, and the sub-frame configuration that uses of macro base station and low power base station different time, macro base station needs the sub-frame set carrying out transmitting restriction to low power base station notice, carry out transmission restriction in order to make low power base station according to the sub-frame set that macro base station notifies in corresponding subframe position;

13. 1 kinds of low power base station, is characterized in that, comprising:

Limiting module, the sub-frame set for carrying out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position;

Wherein, described carry out in corresponding subframe position transmission restriction, refer to that low power base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to macro base station in this subframe; Determination module comprises with the unit of one of under type or its combination: the first determining unit, for after the subframe position of carrying out transmitting restriction to macro base station notice low power base station and number, determine the sub-frame set needing to carry out transmitting restriction according to the sub-frame set of macro base station feedback; Second determining unit, the sub-frame set for indicating according to macro base station determines the sub-frame set needing to carry out transmitting restriction; 3rd determining unit, sub-frame set for indicating according to O & M determines to need the sub-frame set carrying out transmitting restriction, and to be O & M according to the needs that low power base station and macro base station report carry out transmitting the subframe position that limits to the sub-frame set that O & M indicates and number is determined; 4th determining unit, subframe position and number for carrying out transmission restriction according to each low power base station needs determine the sub-frame set needing to carry out transmitting restriction; 5th determining unit, subframe position and number for carrying out transmission restriction according to this low power base station needs determine the sub-frame set needing to carry out transmitting restriction.

14. low power base station as claimed in claim 13, is characterized in that, determination module is further used for the wireline interface that can be supported by base station or air interface or is needed the sub-frame set carrying out transmitting restriction by O & M alternately.

15. low power base station as claimed in claim 13, is characterized in that, determination module is further used for by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8.

16. low power base station as claimed in claim 13, it is characterized in that, when limiting module is further used for carrying out transmission restriction in corresponding subframe position, refer to the transmission limiting low power base station particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to macro base station in this subframe.

17. as arbitrary in claim 13 to 16 as described in low power base station, it is characterized in that, comprise further:

Whether judge module is the same for judging the sub-frame configuration that macro base station and low power base station use;

Limiting module is further used for when different, and transmission restriction is carried out in the ascending-descending subframes configuration according to macro base station; Or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies.

18. low power base station as claimed in claim 13, it is characterized in that, limiting module is further used for when carrying out transmission restriction according to the configuration of the ascending-descending subframes of macro base station, refer to carry out transmitting restriction ascending-descending subframes do not dispatch transmission upstream data or Modulating Power or only pass the CRS of control area and the control information of necessity or only pass control area CRS to avoid the interference to macro base station.

19. 1 kinds of macro base stations, is characterized in that, comprising:

Indicating module, for after low power base station notifies the subframe position that low power base station carries out transmitting restriction and number to macro base station, need the sub-frame set carrying out transmitting restriction to low power base station feedback, and the sub-frame set indicating low power base station to carry out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position; Or for sending the sub-frame set needing to carry out transmitting restriction to low power base station, the sub-frame set that instruction low power base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position;

20. macro base stations as claimed in claim 19, is characterized in that, indicating module is further used for the wireline interface that can be supported by base station or air interface or is indicated the sub-frame set needing to carry out transmitting restriction by O & M.

21. macro base stations as claimed in claim 19, is characterized in that, indicating module is further used for by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8.

22. as arbitrary in claim 19 to 21 as described in macro base station, it is characterized in that, comprise further:

Notification module, for when different, needs the sub-frame set carrying out transmitting restriction to low power base station notice, carry out transmission restriction in order to make low power base station according to the sub-frame set that macro base station notifies.

23. 1 kinds of O & M equipment, is characterized in that, comprising:

Indicating module, is used to indicate low power base station and in corresponding subframe position, carries out transmission restriction according to the sub-frame set of instruction;

24. 1 kinds of low power base station, is characterized in that, comprising:

Limiting module, carries out transmission restriction for the ascending-descending subframes configuration according to macro base station, or low power base station carries out transmission restriction according to the sub-frame set that macro base station notifies in corresponding subframe position;

Wherein, when carrying out transmission restriction according to the configuration of the ascending-descending subframes of macro base station, refer to carry out transmitting restriction ascending-descending subframes do not dispatch transmission upstream data or Modulating Power or only pass the exclusive pilot signal CRS in community of control area and the control information of necessity or only pass control area CRS to avoid the interference to macro base station; Described carry out in corresponding subframe position transmission restriction, refer to that low power base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to macro base station in this subframe.

25. 1 kinds of macro base stations, is characterized in that, comprising:

Notification module, for when the sub-frame configuration determining that macro base station and low power base station use is different, need the sub-frame set carrying out transmitting restriction to low power base station notice low power base station, in corresponding subframe position, carry out transmission restriction in order to make low power base station according to the sub-frame set that macro base station notifies;

Interference avoidance method between 26. 1 kinds of base stations in heterogeneous networks, is characterized in that, comprise the steps:

The sub-frame set that interference base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position;

Wherein, described carry out in corresponding subframe position transmission restriction, refer to that interference base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to interfered base station in this subframe; Determine that interference base station needs the sub-frame set carrying out transmitting restriction in corresponding subframe position, carry out transmission restriction, comprise: in centralized management, interference base station is after can carrying out the sub-frame set of transmission restriction to centerized fusion unit notice interference base station, the sub-frame set that interference base station feeds back according to centerized fusion unit, determines that this set is the sub-frame set needing to carry out transmitting restriction; Or the sub-frame set that interference base station indicates according to centerized fusion unit, determines that this set is the sub-frame set that it needs to carry out transmitting restriction; Or, the sub-frame set that interference base station indicates according to O & M, determine that this set is the sub-frame set that it needs to carry out transmitting restriction, the sub-frame set that O & M the indicates sub-frame set can carrying out transmitting restriction that to be O & M report according to interference base station and the expectation interference base station that interfered base station reports carry out transmitting the sub-frame set limited and determine; Or in distributed management, interference base station independently determines the sub-frame set needing to carry out transmitting restriction.

27. methods as claimed in claim 26, is characterized in that, determine that interference base station needs the sub-frame set carrying out transmitting restriction, comprising:

28. methods as claimed in claim 27, is characterized in that, by information determine alternately interference base station need carry out transmit restriction sub-frame set, comprising:

29. methods as claimed in claim 27, it is characterized in that, comprising alternately of described information is following: interference base station carries out the sub-frame set transmitting restriction, and/or interfered base station expects that interference base station carries out transmitting the sub-frame set of restriction.

30. methods as claimed in claim 27, is characterized in that, the mutual form of described information is by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8.

31. methods as claimed in claim 26, is characterized in that, in distributed management, described interference base station independently determines the sub-frame set needing to carry out transmitting restriction, comprising:

32. methods as claimed in claim 26, it is characterized in that, the sub-frame set that interference base station carries out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position, refer to that interference base station limits the transmission of its particular channel or signal in this subframe position, or carry out whole subframe, or the adjustment in subframe in particular channel or signal power is to avoid the interference to interfered base station in this subframe.

33. as arbitrary in claim 26 to 32 as described in method, it is characterized in that, comprise further:

By the information of the mutual use sub-frame configuration of interfered base station, interference base station judges that whether interference base station is the same with the sub-frame configuration that interfered base station base station uses.

34. methods as claimed in claim 33, is characterized in that, the information of the use sub-frame configuration that interfered base station is mutual be by base station between wireline interface or eat dishes without rice or wine, or mutual by O & M.

Interference avoidance method between 35. 1 kinds of base stations in heterogeneous networks, is characterized in that, comprise the steps:

The control that interfered base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station;

Wherein, described carry out in corresponding subframe position transmission restriction, refer to that interfered base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to interference base station in this subframe; The control that interfered base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station, comprise: in centralized management, to centerized fusion unit notice, interfered base station is after expecting that interference base station carries out transmitting the sub-frame set of restriction, the sub-frame set that interfered base station feeds back according to centerized fusion unit, determines in this set to be need to carry out transmitting the sub-frame set controlled; Or the sub-frame set that interfered base station indicates according to centerized fusion unit, determine the control transmitted in this sub-frame set; Or the sub-frame set that interfered base station indicates according to O & M, determine the control transmitted in this sub-frame set, the sub-frame set that O & M the indicates sub-frame set can carrying out transmitting restriction that to be O & M report according to interference base station and the expectation interference base station that interfered base station reports carry out transmitting the sub-frame set limited and determine; Or in distributed management, according to the instruction of interference base station, interfered base station determines that interference base station needs the sub-frame set carrying out transmitting restriction.

36. methods as claimed in claim 35, is characterized in that, the instruction of information is the wireline interface or air interface or mutual by O & M supported by base station.

37. methods as shown in claim 35, it is characterized in that, the control that interfered base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station, to refer to that in this subframe position interfered base station can be dispatched and is disturbed the transmission that the base station larger service-user of interference carries out data.

38. 1 kinds of base stations, is characterized in that, comprising:

Limiting module, for when base station is interference base station, the sub-frame set carrying out transmitting restriction according to described needs carries out transmission restriction in corresponding subframe position;

Wherein, described carry out in corresponding subframe position transmission restriction, refer to that interference base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to interfered base station in this subframe; Determination module comprises the first determining unit and/or the second determining unit, wherein: the first determining unit, for in centralized management, after notifying that to centerized fusion unit this interference base station can carry out transmitting the sub-frame set of restriction, according to the sub-frame set of centerized fusion unit feedback, determine that this set is the sub-frame set needing to carry out transmitting restriction; Or, according to the sub-frame set of centerized fusion unit instruction, determine that this set is the sub-frame set that it needs to carry out transmitting restriction; Or, according to the sub-frame set that O & M indicates, determine that this set is the sub-frame set that it needs to carry out transmitting restriction, the sub-frame set that O & M the indicates sub-frame set can carrying out transmitting restriction that to be O & M report according to this interference base station and the expectation interference base station that interfered base station reports carry out transmitting the sub-frame set limited and determine; Second determining unit, in distributed management, independently determines the sub-frame set needing to carry out transmitting restriction.

39. base stations as claimed in claim 38, is characterized in that, determination module be further used for determine interference base station need carry out transmit restriction sub-frame set time, by information determine alternately interference base station need carry out transmit restriction sub-frame set.

40. base stations as claimed in claim 39, it is characterized in that, determination module be further used for by information determine that interference base station needs the sub-frame set of carrying out transmitting restriction alternately time, the wireline interface can supported by base station or air interface or undertaken alternately by O & M.

41. base stations as claimed in claim 39, is characterized in that, determination module is further used for comprising the sub-frame set that interference base station carries out transmitting restriction alternately, and/or interfered base station expects that interference base station carries out the information of the sub-frame set transmitting restriction.

42. base stations as claimed in claim 39, it is characterized in that, determination module is further used for when information interaction, by indicating sub-frame set by the mode of X2 oral sex Hu Lin district MBSFN sub-frame configuration in the mode of bitmap or multiplexing LTE R8.

43. base stations as claimed in claim 38, it is characterized in that, the second determining unit is further used in distributed management, independently determines the sub-frame set needing to carry out transmitting restriction, comprising:

44. base stations as claimed in claim 38, it is characterized in that, the sub-frame set that limiting module is further used for carrying out transmitting according to described needs restriction carries out transmission restriction in corresponding subframe position, refer to that interference base station limits the transmission of its particular channel or signal in this subframe position, or carry out whole subframe, or the adjustment in subframe in particular channel or signal power is to avoid the interference to interfered base station in this subframe.

45. as arbitrary in claim 38 to 44 as described in base station, it is characterized in that, comprise further:

By the information of the mutual use sub-frame configuration of interfered base station, judge module, for judging that whether interference base station is the same with the sub-frame configuration that interfered base station base station uses.

46. 1 kinds of base stations, is characterized in that, comprising:

Control module, for when base station is interfered base station, according to the control that interference base station needs the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position;

Wherein, described carry out in corresponding subframe position transmission restriction, refer to that interfered base station limits the transmission of its particular channel or signal in this subframe position, or the adjustment carried out in particular channel in whole subframe or subframe or signal power is to avoid the transmission to interference base station in this subframe; Control module comprises the first control unit and/or the second control unit, wherein: the first control unit, for in centralized management, after expecting that interference base station carries out transmitting the sub-frame set of restriction to centerized fusion unit notice, according to the sub-frame set of centerized fusion unit feedback, determine in this set to be need to carry out transmitting the sub-frame set controlled; Or according to the sub-frame set that centerized fusion unit indicates, determine the control transmitted in this sub-frame set; Or according to the sub-frame set that O & M indicates, determine the control transmitted in this sub-frame set, the sub-frame set that O & M the indicates sub-frame set can carrying out transmitting restriction that to be O & M report according to interference base station and the expectation interference base station that interfered base station reports carry out transmitting the sub-frame set limited and determine; Or according to the instruction of interference base station, the second control unit, in distributed management, determines that interference base station needs the sub-frame set carrying out transmitting restriction.

47. base stations as shown in claim 46, it is characterized in that, control module is further used for the control needing the sub-frame set carrying out transmitting restriction to transmit in corresponding subframe position according to described interference base station, to refer to that in this subframe position interfered base station can be dispatched and is disturbed the transmission that the base station larger service-user of interference carries out data.