CN101365224B - Method and apparatus reducing interference between adjacent cells - Google Patents
Method and apparatus reducing interference between adjacent cells Download PDFInfo
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- CN101365224B CN101365224B CN200710120026XA CN200710120026A CN101365224B CN 101365224 B CN101365224 B CN 101365224B CN 200710120026X A CN200710120026X A CN 200710120026XA CN 200710120026 A CN200710120026 A CN 200710120026A CN 101365224 B CN101365224 B CN 101365224B
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- 238000001514 detection method Methods 0.000 claims description 15
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- 238000007726 management method Methods 0.000 abstract description 63
- 238000013468 resource allocation Methods 0.000 abstract description 7
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Abstract
The invention discloses a method of reducing interference among adjacent cells. The method comprises the following steps: a wireless resource management entity transmits the information of resources occupied by a cell, which is adjacent to the cell where user equipment is located and belongs to SFN service area, to the user equipment; the information comprises a frequency point, a time slot, and a training serial code and/or an interference code used by the occupied time slot; when receiving operation data, the user equipment, according to the received and saved resource information, determines an adjacent cell which occupies the same frequency point and the same time slot as the user equipment, and the time slot of which uses a different training serial code or a different interference code; and according to the determined training serial code and interference code used during the time slot of the adjacent cell and by using a multi-cells joint detecting method, the same-frequency interference caused by the adjacent cell is reduced or eliminated. The invention further discloses a wireless resource management entity and the user equipment. By using the method and the equipment, the interference from the adjacent cell can be reduced or even eliminated without increasing the complexity of resource allocation and without wasting resources.
Description
Technical field
The present invention relates to the monochromatic network broadcast technology, particularly in single frequency network, reduce the method and apparatus of neighbor cell interference.
Background technology
Adopt single frequency network (SFN, Single Frequency Network) during the technical transmission broadcasting service, require identical frequency, the broadcasting service of transmitting on the identical time interval resource must satisfy content synchronization, promptly must transmit identical wireless signal, otherwise will cause co-channel interference at synchronization.
At present, there are three kinds of situations that produce co-channel interference:
First kind is: when same SFN service area comprises a plurality of radio resource management entity management regional, for for the subscriber equipment in the neighbor cell of different radio resource management entity management, when the identical frequency broadcasting service identical with slot transmission, because radio resource management entity can't be known the sub-district of self-management and time difference between the sub-district of self-management scope not, therefore can't guarantee to transmit identical wireless signal at synchronization, and then cause co-channel interference by the subscriber equipment in the neighbor cell of different radio resource management entity management.The SFN zone refers to adopt the zone of SFN technical transmission broadcasting service.
Second kind is: when the subscriber equipment in the neighbor cell in being in different SFN service areas takies identical frequency and slot transmission broadcasting service, because the broadcast service content difference of different SFN service area transmission, therefore neighbor cell can't be realized content synchronization, causes co-channel interference each other.
The third is: when subscriber equipment is in unicast service zone transmission unicast service, if this sub-district, subscriber equipment place existence takies identical frequency and time slot, the neighbor cell that belongs to the SFN service area, then because this neighbor cell transmission broadcasting service, and the signal of broadcasting service is stronger than unicast service, so this sub-district, subscriber equipment place will be subjected to co-channel interference.
For fear of above-mentioned three kinds of co-channel interferences, a kind of method is for setting up certain interval region determining to exist between the neighbor cell of co-channel interference, this method can reduce the co-channel interference between neighbor cell in above-mentioned three kinds of situations to a certain extent, but, caused the waste of resource because interval region is unavailable.
Another kind method is: when carrying out resource allocation, avoid identical frequency of neighbor cell allocation and time slot for there being co-channel interference, but this method makes the resource allocation process complexity, and can reduce the utilance of resource.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of method that reduces neighbor cell interference on the one hand, a kind of subscriber equipment and a kind of radio resource management entity are provided on the other hand, the resource allocation complexity can not increased, do not waste under the prerequisite of resource, reduce even eliminate the interference of neighbor cell.
The method that reduces neighbor cell interference that the embodiment of the invention provides comprises:
A, radio resource management entity are to the subscriber equipment of self-management, send sub-district resource information occupied adjacent with sub-district, described subscriber equipment place, that belong to single frequency network SFN service area, comprise the training sequence code and/or the scrambler of the frequency, time slot and the use of shared time slot that take;
When B, described user device to receive service data, according to the described resource information that receives and preserve, determine and self take identical frequency and time slot, and this time slot uses the different training sequence codes or the neighbor cell of scrambler; The training sequence code and the scrambler that use on this time slot according to the neighbor cell of determining adopt multi-cell joint detection method, reduce even eliminate the co-channel interference that neighbor cell causes.
The radio resource management entity that the embodiment of the invention provides comprises:
Information memory cell, be used to preserve sub-district, the subscriber equipment place shared resource information in sub-district adjacent, that belong to single frequency network SFN service area of managing, comprise training sequence code and/or scrambler that frequency, time slot and this time slot use with described radio resource management entity;
Information transmitting unit, be used for described information memory cell stored resource information, send to the subscriber equipment of described radio resource management entity management, when making described user device to receive service data, according to the described resource information that receives and preserve, determine and self take identical frequency and time slot, and this time slot uses the different training sequence codes or the neighbor cell of scrambler, and the training sequence code and the scrambler that on this time slot, use according to the neighbor cell of determining, adopt multi-cell joint detection method, reduce even eliminate the co-channel interference that neighbor cell causes.
The subscriber equipment that the embodiment of the invention provides comprises:
Information is preserved the unit, be used to receive and preserve the shared resource information in sub-district adjacent with this sub-district, subscriber equipment place, that belong to single frequency network SFN service area, comprise training sequence code and/or scrambler that frequency, time slot and this time slot use from radio resource management entity;
Disturb determining unit, be used for when receiving business datum, determine and self take identical frequency and time slot according to described resource information, and this time slot uses the different training sequence codes or the neighbor cell of scrambler;
Interference cancellation unit is used for training sequence code and scrambler that the shared time slot of the neighbor cell determined according to described interference determining unit uses, adopts multi-cell joint detection method, reduces even eliminates the co-channel interference that neighbor cell causes.
By the description of above technical scheme as can be known, in the embodiment of the invention, make user's device learns adjacent, belong to the shared resource information in sub-district of SFN service area, comprising: training sequence code and/or scrambler that the frequency that takies, time slot and shared time slot use with self sub-district, place.Like this, when subscriber equipment will receive business datum, just can judge whether to exist co-channel interference, and can be, adopt multi-cell joint detection method to reduce even eliminate the co-channel interference that neighbor cell causes according to the resource information that receives according to the resource information that receives.Therefore, the method that reduces neighbor cell interference of utilizing the embodiment of the invention to provide, radio resource management entity and subscriber equipment can not wasted under the prerequisite of resource not increasing the resource allocation complexity, reduce even eliminate the interference of neighbor cell.
Description of drawings
Fig. 1 reduces the flow chart of the method embodiment of neighbor cell interference for the present invention;
Fig. 2 is the structural representation of radio resource management entity of the present invention and UE embodiment.
Embodiment
For making purpose of the present invention, technical scheme and beneficial effect clearer,, the present invention is done detailed description further below in conjunction with embodiment and accompanying drawing.
The key that reduces the method for neighbor cell interference provided by the invention is: make user's device learns shared resource information in sub-district adjacent with self sub-district, place, that belong to the SFN service area, comprising: training sequence code and/or scrambler that the frequency that takies, time slot and shared time slot use.Like this, when subscriber equipment will receive business datum, just can judge whether to exist co-channel interference, and can be, adopt multi-cell joint detection method to reduce even eliminate the co-channel interference that neighbor cell causes according to the resource information that receives according to the resource information that receives.
Fig. 1 reduces the flow chart of the method embodiment of neighbor cell interference for the present invention, and this flow process comprises:
Usually, a radio resource management entity is managed a plurality of sub-districts, has a plurality of UE in each sub-district; SFN service area can comprise part or all of zone of a radio resource management entity management, or comprises part or all of zone of a plurality of radio resource management entity management.Therefore may there be the neighbor cell of managing by the different radio resource management entity in a SFN zone, also may has neighbor cell by the management of same wireless resource management entity.
In this step, radio resource management entity sends to the UE of self-management, and is adjacent with this sub-district, UE place, belong to the shared resource information in the sub-district of SFN service area method can for:
Radio resource management entity is by system message, or multimedia broadcast/group broadcast service puts the message that multiple spot control channel (MCCH) is gone up carrying, or other message sends to described resource information the UE of self-management.
Described resource information can be set in advance in each radio resource management entity;
Also can for: each radio resource management entity and adjacent radio resource management entity communicate, obtain that adjacent radio resource management entity manages, adjacent with the sub-district, UE place that this radio resource management entity is managed, belong to the shared resource information in sub-district of SFN service area.
If in the sub-district that radio resource management entity is managed, there are one or more broadcasting service resource information occupied to change, then this radio resource management entity and adjacent radio resource management entity communicate, and notify adjacent radio resource management entity with the resource information after upgrading.
If UE receives the resource information after the renewal that radio resource management entity sends, then UE upgrades the respective resources information of self having preserved.
The process that adopts multi-cell joint detection method to reduce even eliminate the co-channel interference that neighbor cell causes is a prior art, repeats no more here.
The foregoing description kind radio resource management entity can be radio resource controller (RNC).
The method that adopts the foregoing description to provide can reduce even eliminate in the prior art co-channel interference that produces under three kinds of different situations, makes a concrete analysis of as follows:
If being in, UE realizes broadcasting service in the SFN service area, and one or more neighbor cells of this sub-district, UE place are managed by the different radio resource management entity, in this case, this SFN service area comprises the neighbor cell by the management of different radio resource management entity, the method of then utilizing the foregoing description to provide, UE can be according to the resource information of the neighbor cell that obtains, judge and self take identical time slot and frequency, and this time slot uses the different training sequence codes or the neighbor cell of scrambler, training sequence code and scrambler according to the shared time slot of these neighbor cells, adopt multi-cell joint detection method, reduce even eliminate the co-channel interference that neighbor cell causes.
If being in, UE realizes broadcasting service in the SFN service area, one or more neighbor cells of this sub-district, UE place are in the different SFN service areas, and these neighbor cells take identical frequency and time slot with this sub-district, UE place, then in this case, the method of utilizing the foregoing description to provide, UE can be according to the resource information of the neighbor cell that obtains, judge and self take identical time slot and frequency, and this time slot uses the different training sequence codes or the neighbor cell of scrambler, and training sequence code and scrambler according to the shared time slot of these neighbor cells, adopt multi-cell joint detection method, reduce even eliminate the co-channel interference that neighbor cell causes.
If being in a unicast service zone, UE realizes unicast service, one or more neighbor cells of this sub-district, UE place are in realizes broadcasting service in the SFN service area, in this case, UE can be according to the resource information of the neighbor cell that obtains, judge and self take identical time slot and frequency, and this time slot uses the different training sequence codes or the neighbor cell of scrambler, and according to the training sequence code and the scrambler of the shared time slot of these neighbor cells, adopt multi-cell joint detection method, reduce even eliminate the co-channel interference that neighbor cell causes.
By above embodiment and the concrete analysis as seen, the method that reduces neighbor cell interference that the embodiment of the invention provides can not wasted under the prerequisite of resource not increasing the resource allocation complexity, reduces even eliminate the interference of neighbor cell.
In order to realize the above-mentioned method that reduces neighbor cell interference, the embodiment of the invention provides a kind of radio resource management entity and a kind of subscriber equipment (UE) simultaneously, is illustrated in figure 2 as the structural representation of radio resource management entity of the present invention and UE embodiment.
The radio resource management entity that the embodiment of the invention provides comprises at least: information memory cell and information transmitting unit.
Wherein, information memory cell, be used to preserve the shared resource information in sub-district adjacent, that belong to the SFN service area, sub-district, subscriber equipment place of managing, comprise training sequence code and/or scrambler that frequency, time slot and this time slot use with this radio resource management entity;
Information transmitting unit is used for information memory cell stored resource information, sends to the subscriber equipment of described radio resource management entity management.
This radio resource management entity can further include: the information interaction unit, be used for carrying out information interaction, obtain the shared resource information in sub-district adjacent, that belong to the SFN service area, sub-district, subscriber equipment place described and this radio resource management entity management with adjacent radio resource management entity.
The radio resource management entity here can be radio resource controller (RNC).
The subscriber equipment that the embodiment of the invention provides (UE) comprising: information is preserved the unit, is disturbed determining unit and interference cancellation unit.
Wherein, information is preserved the unit, be used to receive and preserve from radio resource management entity with this shared resource information in sub-district adjacent, that belong to the SFN service area, sub-district, UE place, comprise training sequence code and/or scrambler that frequency, time slot and this time slot use;
Disturb determining unit, be used for when receiving business datum, determine with described subscriber equipment according to described resource information and take identical frequency and time slot, and this time slot uses the different training sequence codes or the neighbor cell of scrambler;
Interference cancellation unit is used for the training sequence code and the scrambler that use according to the shared time slot of the neighbor cell that disturbs determining unit to determine, adopts multi-cell joint detection method to reduce even eliminates the co-channel interference that neighbor cell causes.
As seen from the above embodiment, the present invention comprises by making user's device learns shared resource information in sub-district adjacent with self sub-district, place, that belong to the SFN service area: training sequence code and/or scrambler that the frequency that takies, time slot and shared time slot use.And then, when subscriber equipment will receive business datum, can judge whether to exist co-channel interference according to the resource information that receives, promptly whether exist with self sub-district, place and take identical frequency and time slot, and this time slot uses the neighbor cell of different training sequence codes or scrambler, if exist, then determines to exist co-channel interference, and can be according to the resource information that receives, adopt multi-cell joint detection method to reduce even eliminate the co-channel interference that neighbor cell causes.Therefore, utilize method, UE and the radio resource management entity of the elimination neighbor cell interference that the embodiment of the invention provides, can not increase the resource allocation complexity, do not waste under the prerequisite of resource, eliminate the interference of neighbor cell.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a method that reduces neighbor cell interference is characterized in that, comprising:
A, radio resource management entity are to the subscriber equipment of self-management, send sub-district resource information occupied adjacent with sub-district, described subscriber equipment place, that belong to single frequency network SFN service area, comprise the training sequence code and/or the scrambler of the frequency, time slot and the use of shared time slot that take;
When B, described user device to receive service data, according to the described resource information that receives and preserve, determine and self take identical frequency and time slot, and this time slot uses the different training sequence codes or the neighbor cell of scrambler; The training sequence code and the scrambler that use on this time slot according to the neighbor cell of determining adopt multi-cell joint detection method, reduce even eliminate the co-channel interference that neighbor cell causes.
2. the method for claim 1 is characterized in that, described resource information is set in advance in the radio resource management entity under described subscriber equipment.
3. the method for claim 1 is characterized in that, described resource information is obtained from adjacent radio resource management entity by described radio resource management entity.
4. as each described method of claim 1 to 3, it is characterized in that described steps A is specially:
Radio resource management entity is put the message that multiple spot control channel MCCH goes up carrying by system message or multimedia broadcast/group broadcast service, or other message sends described resource information to the subscriber equipment of self-management.
5. as each described method of claim 1 to 3, it is characterized in that this method further comprises:
If the sub-district resource information occupied that radio resource management entity is managed changes, then this radio resource management entity and adjacent radio resource management entity communicate, and notify adjacent radio resource management entity with the resource information after upgrading.
6. a radio resource management entity is characterized in that, comprising:
Information memory cell, be used to preserve sub-district, the subscriber equipment place shared resource information in sub-district adjacent, that belong to single frequency network SFN service area of managing, comprise training sequence code and/or scrambler that frequency, time slot and this time slot use with described radio resource management entity;
Information transmitting unit, be used for described information memory cell stored resource information, send to the subscriber equipment of described radio resource management entity management, when making described user device to receive service data, according to the described resource information that receives and preserve, determine and self take identical frequency and time slot, and this time slot uses the different training sequence codes or the neighbor cell of scrambler, and the training sequence code and the scrambler that on this time slot, use according to the neighbor cell of determining, adopt multi-cell joint detection method, reduce even eliminate the co-channel interference that neighbor cell causes.
7. radio resource management entity as claimed in claim 6, it is characterized in that, this radio resource management entity further comprises: the information interaction unit, be used for carrying out information interaction, obtain the shared resource information in sub-district adjacent, that belong to the SFN service area, sub-district, subscriber equipment place with described radio resource management entity management with adjacent radio resource management entity.
8. as claim 6 or 7 described radio resource management entity, it is characterized in that described radio resource management entity is radio resource controller RNC.
9. a subscriber equipment is characterized in that, comprising:
Information is preserved the unit, be used to receive and preserve the shared resource information in sub-district adjacent with sub-district, described subscriber equipment place, that belong to single frequency network SFN service area, comprise training sequence code and/or scrambler that frequency, time slot and this time slot use from radio resource management entity;
Disturb determining unit, be used for when receiving business datum, determine with described subscriber equipment according to described resource information and take identical frequency and time slot, and this time slot uses the different training sequence codes or the neighbor cell of scrambler;
Interference cancellation unit is used for training sequence code and scrambler that the shared time slot of the neighbor cell determined according to described interference determining unit uses, adopts multi-cell joint detection method, reduces even eliminates the co-channel interference that neighbor cell causes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710120026XA CN101365224B (en) | 2007-08-07 | 2007-08-07 | Method and apparatus reducing interference between adjacent cells |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710120026XA CN101365224B (en) | 2007-08-07 | 2007-08-07 | Method and apparatus reducing interference between adjacent cells |
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| CN101365224A CN101365224A (en) | 2009-02-11 |
| CN101365224B true CN101365224B (en) | 2011-09-07 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877853B (en) * | 2009-04-28 | 2013-03-06 | 鼎桥通信技术有限公司 | Method for reducing same frequency interferences |
| CN101877854B (en) * | 2009-04-28 | 2013-01-16 | 鼎桥通信技术有限公司 | Method for reducing same frequency interferences |
| CN102316490B (en) * | 2010-06-30 | 2014-04-09 | 中兴通讯股份有限公司 | Method and system for realizing automatic monitoring and processing of co-frequency interference |
| CN102469478A (en) * | 2010-11-08 | 2012-05-23 | 天津赛乐新创通信技术有限公司 | Method by utilizing baseband decoding module to collectively control radio frequency interference |
| CN102469532A (en) * | 2010-11-08 | 2012-05-23 | 天津赛乐新创通信技术有限公司 | Method by utilizing radio frequency interference to solve frequent switch of cell phone |
| CN102843694B (en) * | 2011-06-20 | 2016-03-30 | 普天信息技术研究院有限公司 | A kind of sending method of control information and device |
| CN103945429B (en) * | 2014-04-17 | 2017-10-27 | 京信通信技术(广州)有限公司 | A kind of method, equipment and system for determining co-channel interference source |
| WO2016000100A1 (en) * | 2014-06-11 | 2016-01-07 | 华为技术有限公司 | Base station and communication method for reducing channel interference |
| CN109121195A (en) * | 2017-06-23 | 2019-01-01 | 中兴通讯股份有限公司 | A kind of channeling control method, device and equipment |
| CN110891310B (en) * | 2018-09-07 | 2022-07-15 | 成都鼎桥通信技术有限公司 | Private network voice quality improving method, device and system |
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| CN1451250A (en) * | 2000-03-23 | 2003-10-22 | 西门子移动通讯公司 | Handover procedures in radio communication system |
| CN1882154A (en) * | 2005-06-15 | 2006-12-20 | 阿尔卡特公司 | Method for uplink interference coordination on demand basis, a base station, a mobile terminal and a mobile network therefor |
| CN1882187A (en) * | 2005-06-14 | 2006-12-20 | 阿尔卡特公司 | A method for uplink interference coordination in single frequency networks, a base station, a mobile terminal and a mobile network therefor |
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| CN1451250A (en) * | 2000-03-23 | 2003-10-22 | 西门子移动通讯公司 | Handover procedures in radio communication system |
| CN1882187A (en) * | 2005-06-14 | 2006-12-20 | 阿尔卡特公司 | A method for uplink interference coordination in single frequency networks, a base station, a mobile terminal and a mobile network therefor |
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