CN103338521B - Inter-cell interference coordination method and device - Google Patents
Inter-cell interference coordination method and device Download PDFInfo
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- CN103338521B CN103338521B CN201310246941.9A CN201310246941A CN103338521B CN 103338521 B CN103338521 B CN 103338521B CN 201310246941 A CN201310246941 A CN 201310246941A CN 103338521 B CN103338521 B CN 103338521B
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Abstract
The invention provides a kind of inter-cell interference coordination method and device, described method comprises: obtain the physical layer parameter of current area, and determine in current area, whether there is the Physical Resource Block in physics high load condition according to this physical layer parameter; If exist, obtain the application layer parameter of described current area, and determine that according to described application layer parameter whether the described Physical Resource Block in physics high load condition is in application high load condition; If in application high load condition, send the descriptor of the described Physical Resource Block in application high load condition to neighbor cell, so that interference coordination processing is carried out according to described descriptor in described neighbor cell. The method not only effectively reduces the frequent transmission of descriptor, saves Internet resources, also, by taking into full account the application layer parameter of network, makes interference coordination result more accurate.
Description
Technical field
The present invention relates to the communications field, especially relate to a kind of inter-cell interference coordination method and device.
Background technology
Along with Long Term Evolution (LongTimeEvolution, hereinafter to be referred as LTE), correlation technique is notDisconnected development, identical networking becomes the key of LTE lifting spectrum efficiency, but there is minizone in identical networkingInterference problem. Inter-Cell Interference Coordination (InterCellInterferenceCoordination, below letterClaiming ICIC) technology is a kind of important technology scheme that solves LTE problem of inter-cell interference, it is basicThought is in the mode of inter-cell coordination, the use of Radio Resource in each community to be limited, and comprisesLimiting which running time-frequency resource can use, or limits its transmitting power on certain running time-frequency resource.
Particularly, in existing ICIC technology, two neighbor cells connect by the X2 between eNodeBThe mutual load harmony messages of oral sex, comprises following physical layer parameter: up in this load harmony messagesDisturb and thermal noise disturb overload instruction (ULInterferenceOverloadIndication, below simpleClaim OI), up strong jamming instruction (ULHighInterferenceIndication, hereinafter to be referred asHII) and descending Relative Narrowband TX Power instruction (RelativeNarrowbandTxPower, withLower abbreviation RNTP). The load harmony messages that send according to its neighbor cell receiving certain community,Determine the resource dispatching strategy of this Cell Edge User. But at present, ICIC be mainly use as above severalPhysical layer parameter, as Cell Edge User resource dispatching strategy foundation, can not take into full account that other can supplyThe network parameter of scheduling, makes ICIC scheduling result accuracy not high, and frequent scheduling waste networkResource.
Summary of the invention
For problems of the prior art, the invention provides a kind of inter-cell interference coordination method andDevice, in order to overcome the not high defect of existing ICIC scheduling result accuracy.
The invention provides a kind of inter-cell interference coordination method, comprising:
Obtain the physical layer parameter of current area, and according to described physical layer parameter, determine described current littleIn district, whether there is the Physical Resource Block in physics high load condition;
If exist, obtain the application layer parameter of described current area, and true according to described application layer parameterWhether the fixed described Physical Resource Block in physics high load condition is in application high load condition;
If in application high load condition, send described in application high load condition to neighbor cellThe descriptor of Physical Resource Block, so that interference coordination is carried out according to described descriptor in described neighbor cellProcess.
The invention provides a kind of Inter-Cell Interference Coordination device, comprising:
The first determination module, for obtaining the physical layer parameter of current area, and according to described physical layer ginsengNumber, determines in described current area, whether there is the Physical Resource Block in physics high load condition;
The second determination module, if exist in described current area in physics high load condition for determiningPhysical Resource Block, obtains the application layer parameter of described current area, and true according to described application layer parameterWhether the fixed described Physical Resource Block in physics high load condition is in application high load condition;
Sending module, if for determining that the described Physical Resource Block in physics high load condition is in applicationHigh load condition, sends retouching of the described Physical Resource Block in application high load condition to neighbor cellState information, so that interference coordination processing is carried out according to described descriptor in described neighbor cell.
Inter-cell interference coordination method provided by the invention and device, obtain current by the first determination moduleThe physical layer parameter of community, and determine in current area whether exist in thing according to this physical layer parameterThe Physical Resource Block of reason high load condition, thus the Physical Resource Block in physics high load condition obtained,Obtain the application layer parameter of this current area by the second determination module, and determine according to this application layer parameterWhether the above-mentioned Physical Resource Block in physics high load condition, in application high load condition, only has when placeIn the Physical Resource Block of physics high load condition during simultaneously in application high load condition, just by above-mentioned physicsThe descriptor of Resource Block sends to neighbor cell, not only effectively reduces the frequent transmission of descriptor,Save Internet resources, also, by taking into full account the application layer parameter information of network, make interference coordination resultMore accurate.
Brief description of the drawings
Fig. 1 is the flow chart of inter-cell interference coordination method embodiment mono-of the present invention;
Fig. 2 is the flow chart of inter-cell interference coordination method embodiment bis-of the present invention;
Fig. 3 is the schematic diagram of Inter-Cell Interference Coordination device embodiment mono-of the present invention;
Fig. 4 is the schematic diagram of Inter-Cell Interference Coordination device embodiment bis-of the present invention.
Detailed description of the invention
Fig. 1 is the flow chart of inter-cell interference coordination method embodiment mono-provided by the invention, as Fig. 1 instituteShow, the inter-cell interference coordination method that the present embodiment provides specifically can be for any minizone that exists with frequentlyIn the communication system of disturbing, be particularly useful in LTE system. In LTE system, Internet resources pointJoin taking Physical Resource Block as unit and distribute, because this system adopts identical networking mode, makeBetween two neighbor cell edge customers, there is obvious minizone co-channel interference, make the number of edge customerGreatly reduce according to performances such as handling capacities. The inter-cell interference coordination method that the present embodiment provides is by fully examiningConsider physical layer parameter and the application layer parameter of Physical Resource Block in community, for carrying out Internet resources in neighbor cellCoordination foundation is provided, improve and coordinate result accuracy. The Inter-Cell Interference Coordination side that the present embodiment providesMethod can be carried out by cell base station, also can be carried out by a device arranging separately.
The inter-cell interference coordination method that the present embodiment provides specifically comprises:
Step 101, obtain the physical layer parameter of current area, and according to described physical layer parameter, determineIn described current area, whether there is the Physical Resource Block in physics high load condition, if exist, holdRow step 102, otherwise, execution step 101 continued;
In the present embodiment, the physical layer of each Physical Resource Block in Real-time Obtaining current area, base station, current areaParameter, this physical layer parameter comprises to be disturbed and thermal noise OI, strong jamming HII and Relative Narrowband TX PowerAt least one parameter in instruction RNTP. And determine that according to above-mentioned physical layer parameter each physics of community providesIn the piece of source, whether there is the Physical Resource Block in physics high load condition, can be according to existing ICIC technologyRealize, be not repeated herein. If do not exist, continue Real-time Collection and obtain the physics of each Physical Resource BlockLayer parameter judges.
Step 102, obtain the application layer parameter of described current area, and true according to described application layer parameterWhether determine the described Physical Resource Block in physics high load condition in application high load condition, if inApplication high load condition, performs step 103, otherwise, execution step 101;
In the present embodiment, when determine the physics money existing in physics high load condition according to physical layer parameterWhen source piece, base station, current area gathers the application layer parameter of obtaining current area, such as in current areaData traffic sum and/or signaling sum, and determine and be somebody's turn to do in physics high capacity shape according to this application layer parameterWhether the Physical Resource Block of state is simultaneously in application high load condition. What deserves to be explained is described application layerThe acquisition of parameter is by carrying in all Physical Resource Block that carry out service communication in current areaBusiness datum statistics obtains.
In the present embodiment, due in actual applications, in each community, available Physical Resource Block is fixing, bandwidth is 20M, totally 100 Physical Resource Block. If current area in application high load condition,Illustrate that in current area, whole Physical Resource Block are all used, now, current area does not have other can supply to adjustThe Physical Resource Block of degree, cannot the Physical Resource Block of self-regulation in physics high load condition in communityDistribution in the heart and cell edge, can only regulate these in physics high load condition by neighbor cellThe method of salary distribution of Physical Resource Block in this neighbor cell reduce the presence of intercell interference to current area.If current area, not in application high load condition, illustrate in current area the thing in idle condition in additionReason Resource Block can be for scheduling, and current area can be replaced by using in the Physical Resource Block of idle condition soChange the tune that the modes such as the Physical Resource Block in physics high load condition realize Physical Resource Block in current areaDegree distributes, and does not need to trigger the Coordination Treatment of neighbor cell.
Step 103, retouching to the described Physical Resource Block in application high load condition of neighbor cell transmissionState information, so that interference coordination processing is carried out according to described descriptor in described neighbor cell.
In the present embodiment, when the Physical Resource Block in physics high load condition is simultaneously in application high capacityWhen state, illustrate that the physical channel environment that in current area, this Physical Resource Block experiences is severe, business shouldBy situation busy and do not have other available Physical Resource Block can for scheduling, if neighbor cell edge customer makesCarry out service communication with this Physical Resource Block, can form obvious interference to current area edge customer, largeThe large service quality that reduces this current Cell Edge User. Therefore, base station, current area is to neighbor cell baseStand and send the descriptor of this Physical Resource Block in application high load condition, make neighbor cell base stationCan coordinate configuration to the resource of the edge customer in its coverage according to this descriptor.
In the present embodiment, base station, current area is by obtaining the physical layer parameter of current area, and according to thisPhysical layer parameter determines in current area, whether there is the Physical Resource Block in physics high load condition,Thereby obtain the Physical Resource Block in physics high load condition, afterwards by obtaining this current areaApplication layer parameter, and determine the above-mentioned physical resource in physics high load condition according to this application layer parameterWhether piece, in application high load condition, only has when the Physical Resource Block while in physics high load conditionIn the time of application high load condition, just the descriptor of above-mentioned Physical Resource Block is sent to neighbor cell,Not only effectively reduce the frequent transmission of descriptor, save Internet resources, also by taking into full account networkApplication layer parameter information, make interference coordination result more accurate.
Fig. 2 is the flow chart of inter-cell interference coordination method embodiment bis-of the present invention, as shown in Figure 2, and shouldMethod comprises:
Step 201, obtain the physical layer parameter of current area, and according to described physical layer parameter, determineIn described current area, whether there is the Physical Resource Block in physics high load condition, if exist, holdRow step 202, otherwise, execution step 201 continued;
Step 202, obtain the application layer parameter of described current area, judge the value of described application layer parameterWhether be greater than predetermined threshold value, if be greater than, perform step 203, otherwise, execution step 201;
Step 203, determine that the described Physical Resource Block in physics high load condition is simultaneously high in applyingLoad condition;
Particularly, described application layer parameter comprise the data traffic sum of community and/or the signaling of community totalNumber. Due to the user in this current area be by this current cell base station complete with Nei He community, community outsideUser's communication, so base station, current area can obtain data traffic sum and the signaling sum of community.What deserves to be explained is, described data traffic sum and signaling sum have reflected respectively the different business in communityThe service condition of type, such as, the data volumes such as video traffic are relatively large, can pass through data traffic sumReflection such application load situation in community, and business such as micro-letter, picture and Control on Communication letterThe data volume that breath produces is smaller, can be by the statistics of signaling sum in community is reflected to such applicationLoading condition.
Particularly, both can using in the signaling sum of the data traffic sum of community and community any asJudge that whether the above-mentioned Physical Resource Block in physics high load condition is in applying complying with of high load conditionAccording to, also can be using both jointly as the foundation judging.
Preferably, above-mentioned in thing as judging using the data traffic sum of community and the signaling sum of communityWhether the Physical Resource Block of reason high load condition is in applying the foundation of high load condition, when this data flowAmount sum is greater than the first predetermined threshold value, and signaling sum is while being greater than the second predetermined threshold value, illustrates that this is current littleDistrict is current in the heavy traffic stage, and the whole Physical Resource Block in current area are all used, currentThis distribution of the Physical Resource Block in physics high load condition in this current area cannot be dispatched in community,Thereby determine that this Physical Resource Block in physics high load condition is simultaneously in application high load condition. ValueMust illustrate, described the first predetermined threshold value and the second predetermined threshold value can be dynamic according to network actual conditionsAdjust and determine.
Step 204, to the described descriptor number of Physical Resource Block in application high load conditionAccording to encapsulation, described descriptor comprises the physics of the described Physical Resource Block in application high load conditionLayer parameter;
Step 205, the descriptor after data encapsulation is sent to described adjacent little by X2 interfaceDistrict, so that interference coordination processing is carried out according to described descriptor in described neighbor cell.
In practical application, because base station, current area and neighbor cell base station are to hand over by X2 interfaceMutual, therefore, the descriptor of the Physical Resource Block in application high load condition need to be carried out to dataEncapsulation, makes it meet the transmission specification of X2 interface. This descriptor comprises described high negative in applyingThe physical layer parameter of the Physical Resource Block of the state of carrying, neighbor cell base station is receiving after this descriptor,Through parsing the physical layer parameter that obtains this Physical Resource Block in application high load condition, according to this thingReason layer parameter carries out interference coordination processing, such as, forbidding using in the edge customer of this neighbor cell shouldPhysical Resource Block, or, the transmitting power of this Physical Resource Block etc. adjusted.
In the present embodiment, determine place by the signaling sum according to the data traffic sum of community and/or communityWhether in application high load condition, take into full account current in the Physical Resource Block of physics high load conditionThe application load situation of current area, with the application load situation of community in physics high load conditionThe scheduling of Physical Resource Block in neighbor cell, according to supplementing, is more as the criterion Inter-Cell Interference CoordinationThe really application load situation of reflection community, avoids the network resources waste causing due to frequent scheduling.
Fig. 3 is the schematic diagram of Inter-Cell Interference Coordination device embodiment mono-of the present invention, as shown in Figure 3, and shouldDevice comprises:
The first determination module 11, for obtaining the physical layer parameter of current area, and according to described physical layerParameter, determines in described current area, whether there is the Physical Resource Block in physics high load condition;
The second determination module 12, if exist in physics high load condition for determining in described current areaPhysical Resource Block, obtain the application layer parameter of described current area, and according to described application layer parameterDetermine that whether the described Physical Resource Block in physics high load condition is in application high load condition;
Sending module 13, if for determining that the described Physical Resource Block in physics high load condition is in answeringWith high load condition, the Physical Resource Block in application high load condition described in sending to neighbor cellDescriptor, so that interference coordination processing is carried out according to described descriptor in described neighbor cell.
The device of the present embodiment can be for the technical scheme of embodiment of the method shown in execution graph 1, its realizationPrinciple and technique effect are similar, repeat no more herein.
Fig. 4 is the schematic diagram of Inter-Cell Interference Coordination device embodiment bis-of the present invention, as shown in Figure 4,On basis embodiment illustrated in fig. 3, described the second determination module 12, comprising:
Acquiring unit 121, if exist in described current area in physics high load condition for determiningPhysical Resource Block, obtains the application layer parameter of described current area;
Whether judging unit 122, be greater than predetermined threshold value for the value that judges described application layer parameter;
Determining unit 123, if be greater than predetermined threshold value for the value of described application layer parameter, described in determiningPhysical Resource Block in physics high load condition is simultaneously in application high load condition.
Further, described sending module 13, comprising:
Encapsulation unit 131, for the description letter to the described Physical Resource Block in application high load conditionBreath carries out data encapsulation, and described descriptor comprises the described physical resource in application high load conditionThe physical layer parameter of piece;
Transmitting element 132, for sending described descriptor after data encapsulation by X2 interfaceGive described neighbor cell, so that interference coordination processing is carried out according to described descriptor in described neighbor cell.
The device of the present embodiment can be for the technical scheme of embodiment of the method shown in execution graph 2, its realizationPrinciple and technique effect are similar, repeat no more herein.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodimentCan complete by the relevant hardware of programmed instruction, aforesaid program can be stored in a computer-readableGet in storage medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And it is aforementionedStorage medium comprise: various Jie that can be program code stored such as ROM, RAM, magnetic disc or CDMatter.
Finally it should be noted that: above each embodiment is only in order to technical scheme of the present invention to be described, but not rightIts restriction; Although the present invention is had been described in detail with reference to aforementioned each embodiment, this area commonTechnical staff is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified,Or some or all of technical characterictic is wherein equal to replacement; And these amendments or replacement, andDo not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (8)
1. an inter-cell interference coordination method, is characterized in that, comprising:
Obtain the physical layer parameter of current area, and according to described physical layer parameter, determine described current littleIn district, whether there is the Physical Resource Block in physics high load condition;
If exist, obtain the application layer parameter of described current area, and true according to described application layer parameterWhether determine the described Physical Resource Block in physics high load condition in application high load condition, wherein,Described application layer parameter comprises the data traffic sum of community and/or the signaling sum of community;
If in application high load condition, send the described thing in application high load condition to neighbor cellThe descriptor of reason Resource Block, so that interference coordination place is carried out according to described descriptor in described neighbor cellReason.
2. method according to claim 1, is characterized in that, described according to described application layer parameterDetermine that the described Physical Resource Block in physics high load condition, whether in application high load condition, comprising:
Whether the value that judges described application layer parameter is greater than predetermined threshold value;
If be greater than, determine that the described Physical Resource Block in physics high load condition is simultaneously high in applyingLoad condition.
3. method according to claim 1 and 2, is characterized in that, described physical layer parameter, bagDraw together:
Disturb and thermal noise OI, strong jamming HII and Relative Narrowband TX Power are indicated in RNTP at leastA parameter.
4. method according to claim 1 and 2, is characterized in that, describedly sends to neighbor cellThe descriptor of the described Physical Resource Block in application high load condition, so that described neighbor cell basisDescribed descriptor is carried out interference coordination processing, comprising:
Descriptor to the described Physical Resource Block in application high load condition is carried out data encapsulation, instituteState the physical layer parameter that descriptor comprises the described Physical Resource Block in application high load condition;
Descriptor after data encapsulation is sent to described neighbor cell by X2 interface, so thatInterference coordination processing is carried out according to described descriptor in described neighbor cell.
5. an Inter-Cell Interference Coordination device, is characterized in that, comprising:
The first determination module, for obtaining the physical layer parameter of current area, and according to described physical layer ginsengNumber, determines in described current area, whether there is the Physical Resource Block in physics high load condition;
The second determination module, if exist in described current area in physics high load condition for determiningPhysical Resource Block, obtains the application layer parameter of described current area, and true according to described application layer parameterWhether determine the described Physical Resource Block in physics high load condition in application high load condition, wherein,Described application layer parameter, comprises the data traffic sum of community and/or the signaling sum of community;
Sending module, if for determining that the described Physical Resource Block in physics high load condition is in applicationHigh load condition, sends retouching of the described Physical Resource Block in application high load condition to neighbor cellState information, so that interference coordination processing is carried out according to described descriptor in described neighbor cell.
6. device according to claim 5, is characterized in that, described the second determination module, comprising:
Acquiring unit, if for determining the physics of existence in physics high load condition in described current areaResource Block, obtains the application layer parameter of described current area;
Whether judging unit, be greater than predetermined threshold value for the value that judges described application layer parameter;
Determining unit, if be greater than predetermined threshold value for the value of described application layer parameter, determine described inThe Physical Resource Block of physics high load condition is simultaneously in application high load condition.
7. according to the device described in claim 5 or 6, it is characterized in that described physical layer parameter, bagDraw together:
Disturb and thermal noise OI, strong jamming HII and Relative Narrowband TX Power are indicated in RNTP at leastA parameter.
8. according to the device described in claim 5 or 6, it is characterized in that, described sending module, comprising:
Encapsulation unit, for entering the descriptor of the described Physical Resource Block in application high load conditionRow data encapsulation, the Physical Resource Block in application high load condition described in described descriptor comprisesPhysical layer parameter;
Transmitting element, described in sending to the descriptor after data encapsulation by X2 interfaceNeighbor cell, so that interference coordination processing is carried out according to described descriptor in described neighbor cell.
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| CN101854636A (en) * | 2009-03-30 | 2010-10-06 | 大唐移动通信设备有限公司 | Confirming method, system and equipment of OI (Overload Indication) threshold value |
| CN102065550A (en) * | 2009-11-12 | 2011-05-18 | 大唐移动通信设备有限公司 | Method and device for reducing inter-cell interference of orthogonal frequency division multiplexing system and terminal thereof |
| CN102088735A (en) * | 2010-03-24 | 2011-06-08 | 电信科学技术研究院 | Method and equipment for balancing inter-sub-frame traffic load and processing inter-cell interference (ICI) |
| WO2012044019A2 (en) * | 2010-09-28 | 2012-04-05 | Lg Electronics Inc. | Inter-cell interference coordination in a wireless communication system |
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| CN101854636A (en) * | 2009-03-30 | 2010-10-06 | 大唐移动通信设备有限公司 | Confirming method, system and equipment of OI (Overload Indication) threshold value |
| CN102065550A (en) * | 2009-11-12 | 2011-05-18 | 大唐移动通信设备有限公司 | Method and device for reducing inter-cell interference of orthogonal frequency division multiplexing system and terminal thereof |
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