CN101877853B - Method for reducing same frequency interferences - Google Patents
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- CN101877853B CN101877853B CN 200910082737 CN200910082737A CN101877853B CN 101877853 B CN101877853 B CN 101877853B CN 200910082737 CN200910082737 CN 200910082737 CN 200910082737 A CN200910082737 A CN 200910082737A CN 101877853 B CN101877853 B CN 101877853B
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Abstract
The invention discloses a method for reducing same frequency interferences, which comprises the following steps of: a, when UE1 applies for a resource from a system, judging whether UE in a connection state exists in a cell adjacent to the UE1 by RNC according to the current position information of the UE1, if so, performing the step b, otherwise, performing the step d; b, according to position information of the UE1 and the adjacent UE, judging whether wave beam superposition exists between a wireless wave beam from a service cell of the UE1 to the UE1 and a wireless wave beam from a service cell of any adjacent UE to the UE, if so, performing the step c, otherwise, performing the step d; c, according to a carrier frequency/time slot dissimilarity principle of the adjacent UE, allocating a resource occupying a time slot or frequency different from that of the adjacent UE to the UE1 by the RNC, and if the allocation is failed, performing the step d, otherwise, finishing the method; and d, according to the current resource allocation method, allocating a resource to the UE1 in the service cell of the UE1. The method can reduce the same frequency interferences from a cell and a neighboring cell.
Description
Technical field
The present invention relates to reduce the technology of disturbing in the mobile communication system, particularly relate to a kind of method that reduces co-channel interference.
Background technology
In the TD-SCDMA system, if the overlapping a plurality of UE of wave beam are distributed on the identical carrier frequency/time slot, then produce co-channel interference.Co-channel interference is one of most important interference source.Co-channel interference may come from this residential quarter, also may come from adjacent cell, and more remarkable from the co-channel interference of adjacent area.
At present, existing resource allocation methods can be avoided the co-channel interference from this residential quarter, in the method, radio network controller (RNC) can be in conjunction with the positional information of each UE, such as arrival direction angle (AOA) information, service bandwidth according to new application resource UE need to be its Resources allocation, if other UE in the local area and the UE that is somebody's turn to do new application resource exist wave beam overlapping, then adopting the different principle of carrier frequency/time slot of adjacent UE is this new UE Resources allocation, and the different principle of the carrier frequency/time slot of described adjacent UE is the resource that adjacent different UEs configuration takies different carrier frequency or time slot.Like this, can guarantee to exist in the same residential quarter the overlapping UE of wave beam to be distributed on the different carrier frequency or time slot, thereby avoid the co-channel interference between UE in this residential quarter.
But, because existing resource allocation methods divides timing not have consideration from the co-channel interference of adjacent cell carrying out resource, therefore, can not reduce the co-channel interference from adjacent cell.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that reduces co-channel interference, and the method can reduce the co-channel interference from this residential quarter and adjacent cell.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of method that reduces co-channel interference, the method may further comprise the steps:
A, as UE1 during to system's application resource, RNC is according to the current location information of UE1, judges in the neighbor cell of UE1 whether have the neighboring user equipment that is in connection status, if so, execution in step b then, otherwise, execution in step d;
B, RNC are according to the positional information of UE1 and described neighboring user equipment, whether the Serving cell of judging UE1 is to the Serving cell of the Antenna Beam of UE1 and arbitrary described neighboring user equipment to existing wave beam overlapping between the Antenna Beam of this neighboring user equipment, if it is execution in step c, otherwise execution in step d;
C, RNC are the resource of UE1 distribution with described neighboring user hold facility different time-gap or frequency according to the different principle of the carrier frequency/time slot of adjacent UE, if described the distribution unsuccessfully then execution in step d, otherwise would finish the method flow process;
D, RNC be according to existing resource allocation methods, is the UE1 Resources allocation at the Serving cell of UE1.
Preferably, the method further comprises:
E, after UE1 enters connection status, RNC carries out Real-Time Monitoring to the positional information of UE1, and determine according to this positional information whether UE1 has the neighboring user equipment that is in connection status, if, current interference level associated arguments is measured and reported to the neighboring user equipment of UE1 and UE1 that then triggers in real time, and described interference level associated arguments is Interference Signal Code Power (ISCP) or error rates of data (BLER);
F, the described interference level associated arguments that reports when UE1 and any one described neighboring user equipment UE 2 in Preset Time greater than predetermined threshold value, and when UE1 and UE2 still keep adjacent, RNC judges whether UE1 and UE2 are in different districts, if, then RNC adjusts the resource of UE1 or UE2 according to the different principle of the carrier frequency/time slot of adjacent UE, perhaps UE1 or UE2 is carried out the residential quarter switching;
In the neighboring user equipment at UE1 and UE1, only the described interference level associated arguments that reports of UE1 in Preset Time greater than predetermined threshold value, and when there is a neighboring user equipment at least in UE1, RNC adjusts the resource of UE1 according to the different principle of the carrier frequency/time slot of adjacent UE, perhaps described UE1 is carried out the residential quarter and switch.
Preferably, the resource according to the different principle adjustment UE1 of the carrier frequency/time slot of adjacent UE or UE2 is described in the step f:
RNC selects the data service rate minimum among UE1 and all UE2 or pre-setting priority UE minimum or described interference level associated arguments maximum, as the target UE that carries out the resource adjustment; According to the different principle of the carrier frequency/time slot of adjacent UE, be this target UE Resources allocation again.
Preferably, described step f further comprises: if the resource failure of described adjustment UE1 or UE2 is then carried out the residential quarter switching to UE1 or UE2.
Preferably, described in the step f UE1 or UE2 being carried out the residential quarter switches to:
UE1 is switched to the residential quarter of received signal code power maximum in the residential quarter at all UE2 places, maybe the UE of the maximum of interference level associated arguments described in all UE2 is switched to the residential quarter at UE1 place.
Preferably, described in the step f UE1 or UE2 being carried out the residential quarter switches to:
UE1 is switched to the residential quarter of received signal code power maximum in the residential quarter at all UE2 places, maybe the UE of the maximum of interference level associated arguments described in all UE2 is switched to the residential quarter at UE1 place.
Preferably, described step g further comprises: after described in the step g adjusted unsuccessfully, described UE1 is carried out the residential quarter switch.
Preferably, in the described step g described UE1 being carried out the residential quarter switches to:
UE1 is switched in the residential quarter at neighboring user equipment place of UE1 of received signal code power maximum.
In sum, the method of the reduction co-channel interference that the present invention proposes, by when distributing physical resource for UE, according to the positional information of UE and and adjacent UE between disturbed condition, be preferably this UE and distribute the resource that produces co-channel interference between the adjacent UE that can not make its and this residential quarter and adjacent cell, thus when can the reduction system moving from the co-channel interference of this residential quarter and adjacent cell subscriber equipment.
Description of drawings
Fig. 1 is the flow chart of the embodiment of the invention one.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Main thought of the present invention is, system is when distributing physical resource for UE, based on existing resource allocation methods, according to the positional information of UE and its adjacent UE and the disturbed condition between adjacent UE, can not make for this UE priority allocation between the adjacent UE of itself and this residential quarter and adjacent cell and produce the resource of co-channel interference, thereby reach the purpose of the operating co-channel interference of reduction system.
Fig. 1 is the flow chart of the embodiment of the invention one, and as shown in Figure 1, the embodiment of the invention one mainly comprises:
Here, UE1 not only refers to scene in the new access network of this UE to system's application resource, also comprises because of business setting up (or revise, discharge), switch and anyly carrying out the scene that physical resource is adjusted.
In this step, as UE1 during to system's application resource, if this UE 1 has the adjacent UE that is in connection status in its adjacent cell, then need to be in the resource allocation process of subsequent step, consider to avoid UE adjacent with this to produce co-channel interference as far as possible, if and this UE1 is not in the adjacent UE of connection status in its adjacent cell, then only need this moment to consider to avoid the problem of co-channel interference in the same residential quarter to get final product, and utilize existing resource allocation methods to address this problem, therefore, adopt existing resource allocation methods this moment, is that this UE1 Resources allocation gets final product at the Serving cell of UE1.
Obtaining of described positional information can adopt existing method to realize, as obtaining AOA information by the AOA measurement, perhaps obtains positional information etc. by global position systems such as GPS, do not repeat them here;
Here, need to prove, the resource among the present invention is physical resource, will repeat no more below.
In this step, the Serving cell of judging UE1 the Antenna Beam on the UE1 current location whether and the Serving cell of at least one described neighboring user equipment between the Antenna Beam on the current location of this neighboring user equipment, exist wave beam overlapping, if, then may produce co-channel interference, need to avoid by subsequent step the appearance of this interference this moment, if and the Serving cell of UE1 does not exist described wave beam overlapping at the Serving cell of the Antenna Beam on the UE1 current location and all described neighboring user equipment between the Antenna Beam on the current location of the neighboring user equipment of correspondence, then can not produce co-channel interference, can utilize existing resource allocation methods this moment, and directly the Serving cell at UE1 is that the UE1 Resources allocation gets final product.
This step, under the UE that judges UE1 and may be adjacent the residential quarter produces the situation of co-channel interference, to carry out, here by being the resource of UE1 distribution with described neighboring user hold facility different time-gap or frequency, overcome issuable problem of co-channel interference, but, when the restriction owing to resource, and do not have enough when satisfying the resource of the different principle of carrier frequency/time slot, this distributes can be failed, at this moment, need to be in subsequent step in conjunction with the disturbed condition of each UE, Resources allocation UE is carried out the adjustment of resource, to reduce co-channel interference.
By above-mentioned steps 101～step 104, can make system when being the UE Resources allocation of new application resource, positional information according to UE and its adjacent UE, be preferably the resource that this UE distributes generation co-channel interference between the adjacent UE that can not make its and this residential quarter and adjacent cell, that is to say, as much as possible avoid to cause this UE and its all adjacent UE to produce the resource of co-channel interference for this UE distributes, thereby can effectively reduce the operating co-channel interference of system.
In technique scheme, when the different principle of the carrier frequency/time slot of utilizing adjacent UE in the step 104 is UE1 Resources allocation when failure, by step 102 according to existing resource allocation methods, utilize the resource of this residential quarter to be the UE1 Resources allocation, because it is different that can't accomplish with the carrier frequency/time slot of the adjacent UE of adjacent cell this moment, therefore may there be the overlapping and co-channel interference of wave beam.In addition, after system's operation, because the change in location of UE also can cause the co-channel interference level in the system to change.
Therefore, in order more effectively to reduce co-channel interference, the present embodiment can also be after this UE1 enters connection status, positional information to UE1 and adjacent UE thereof is carried out Real-Time Monitoring, and trigger UE1 and adjacent UE measures current separately interference level in real time, and when the interference level of at least one described UE acquires a certain degree, by resource adjustment or residential quarter switching or the resource adjustment is switched combined mode with the residential quarter, the co-channel interference in the minimizing system running.Particularly, can realize by following step:
Step 201, after UE1 enters connection status, RNC carries out Real-Time Monitoring to the positional information of UE1, and determine according to this positional information whether UE1 has the neighboring user equipment that is in connection status, if, current interference level associated arguments is measured and reported to the neighboring user equipment of UE1 and UE1 that then triggers in real time, and described interference level associated arguments is Interference Signal Code Power (ISCP) or error rates of data (BLER).
Step 202, the described interference level associated arguments that reports when UE1 and any one described neighboring user equipment UE 2 in Preset Time greater than predetermined threshold value, and when UE1 and UE2 still keep adjacent, RNC judges whether UE1 and UE2 are in different districts, if, then RNC adjusts the resource of UE1 or UE2 according to the different principle of the carrier frequency/time slot of adjacent UE, perhaps UE1 or UE2 is carried out the residential quarter switching.
In this step, described interference level associated arguments in Preset Time greater than predetermined threshold value, illustrate that interference level has deteriorated into the degree of needs control, this step is to have in the situation of interference level deterioration the resource adjustment of carrying out for the adjacent UE at UE1 and at least one UE1.Described UE2 is any one interference level associated arguments of UE1 adjacent UE greater than predetermined threshold value in Preset Time, in actual applications, this interference level associated arguments adjacent UE greater than predetermined threshold value in Preset Time may be a plurality of, namely can have a plurality of UE2.
Particularly, described RNC according to the different principle of the carrier frequency/time slot of adjacent UE adjust UE1 or UE2 resource can for:
RNC selects the data service rate minimum among UE1 and all UE2 or pre-setting priority UE minimum or described interference level associated arguments maximum, as the object UE of carrying out the resource adjustment; According to the different principle of the carrier frequency/time slot of adjacent UE, be this target UE Resources allocation again.
Here, specifically select target subscriber equipment in UE1 and all UE2 how can be determined according to actual needs.
In this step, can also utilize the joint-detection in the same residential quarter by UE1 or UE2 are carried out the mode that switch the residential quarter, reduce the phase mutual interference between UE.Particularly cell switching method can for:
UE1 is switched to the residential quarter of signal quality best (being that received signal code power is maximum) in the residential quarter at all UE2 places, maybe the UE of interference level among all UE2 the highest (being that the interference level associated arguments is maximum) is switched to the residential quarter at UE1 place.
Need to prove, in actual applications, switch with respect to the residential quarter, the success rate that above-mentioned resource is adjusted is higher, therefore, preferably, when UE1 and UE2 are in different districts, first the resource of UE1 or UE2 is carried out above-mentioned adjustment, when this adjusts unsuccessfully, the mode that adopts again above-mentioned residential quarter to switch so, can improve the reliability of co-channel interference.
Step 203, in the neighboring user equipment at UE1 and UE1, only the described interference level associated arguments that reports of UE1 in Preset Time greater than predetermined threshold value, and when there is a neighboring user equipment at least in UE1, RNC adjusts the resource of UE1 according to the different principle of the carrier frequency/time slot of adjacent UE, perhaps described UE1 is carried out the residential quarter and switch.
In this step, the described interference level associated arguments that reports as UE1 only is in Preset Time during greater than predetermined threshold value, can adjust by the resource to UE1 only, be adjacent the different carrier frequency/time slot resource of UE for UE1 redistributes, perhaps UE1 be carried out the residential quarter and switch.
In this step UE1 is carried out the concrete grammar that switch the residential quarter, can determine according to actual needs, preferably, can be according to the Serving cell signal quality, UE1 is switched in the residential quarter at best (being the received signal code power maximum) the neighboring user equipment place of signal quality, like this, can more effectively utilize the joint-detection in the same residential quarter, reach the purpose that reduces the phase mutual interference.
Further, similar with step 202, can also take resource adjustment and residential quarter to switch the mode that combines in this step and reduce interference between UE, preferably, first the resource of UE1 is adjusted, if should adjust unsuccessfully, then again UE1 is carried out the residential quarter switching.
Can find out by above-mentioned steps 201～203, when system moves, RNC needs respectively to be in the real-time monitoring system positional information of the UE of connection status, and determine according to these positional informations whether the UE respectively be in connection status exists neighboring user equipment, if exist then trigger each UE and adjacent UE measures and report current interference level associated arguments in real time, when the interference level associated arguments that reports as one or more UE exceeds predetermined threshold value, then RNC can by the mode of resource adjustment or residential quarter switching or both combinations, come the interference between the UE in service of reduction system.
In sum, above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a method that reduces co-channel interference is characterized in that, the method may further comprise the steps:
A, when user equipment (UE) 1 during to system's application resource, radio network controller (RNC) is according to the current location information of UE1, judges in the neighbor cell of UE1 whether have the neighboring user equipment that is in connection status, if, execution in step b then, otherwise, execution in step d;
B, RNC are according to the positional information of UE1 and described neighboring user equipment, whether the Serving cell of judging UE1 is to the Serving cell of the Antenna Beam of UE1 and arbitrary described neighboring user equipment to existing wave beam overlapping between the Antenna Beam of this neighboring user equipment, if it is execution in step c, otherwise execution in step d;
C, RNC are in the neighboring user hold facility different time-gap of connection status or the resource of frequency according to the different principle of the carrier frequency/time slot of adjacent UE for UE1 distributes with described, if described the distribution unsuccessfully then execution in step d, otherwise would finish the method flow process;
D, RNC are the UE1 Resources allocation at the Serving cell of UE1.
2. method according to claim 1 is characterized in that, the method further comprises:
E, after UE1 enters connection status, RNC carries out Real-Time Monitoring to the positional information of UE1, and determine according to this positional information whether UE1 has the neighboring user equipment that is in connection status, if, current interference level associated arguments is measured and reported to the neighboring user equipment of UE1 and UE1 that then triggers in real time, and described interference level associated arguments is Interference Signal Code Power (ISCP) or error rates of data (BLER);
F, the described interference level associated arguments that reports when UE1 and any one described neighboring user equipment UE 2 in Preset Time greater than predetermined threshold value, and when UE1 and UE2 still keep adjacent, RNC judges whether UE1 and UE2 are in different districts, if, then RNC adjusts the resource of UE1 or UE2 according to the different principle of the carrier frequency/time slot of adjacent UE, perhaps UE1 or UE2 is carried out the residential quarter switching; Describedly UE1 or UE2 are carried out the residential quarter switch to: UE1 is switched to the residential quarter of received signal code power maximum in the residential quarter at all UE2 places, maybe the UE of the maximum of interference level associated arguments described in all UE2 is switched to the residential quarter at UE1 place;
In the neighboring user equipment at UE1 and UE1, only the described interference level associated arguments that reports of UE1 in Preset Time greater than predetermined threshold value, and when there is a neighboring user equipment at least in UE1, RNC adjusts the resource of UE1 according to the different principle of the carrier frequency/time slot of adjacent UE, perhaps described UE1 is carried out the residential quarter and switch.
3. method according to claim 2 is characterized in that, the resource according to the different principle adjustment UE1 of the carrier frequency/time slot of adjacent UE or UE2 described in the step f is:
RNC selects the data service rate minimum among UE1 and all UE2 or pre-setting priority UE minimum or described interference level associated arguments maximum, as the target UE that carries out the resource adjustment; According to the different principle of the carrier frequency/time slot of adjacent UE, be this target UE Resources allocation again.
4. according to claim 2 or 3 described methods, it is characterized in that, described step f further comprises: if the resource failure of described adjustment UE1 or UE2, then UE1 or UE2 are carried out the residential quarter switching, UE1 is switched to the residential quarter of received signal code power maximum in the residential quarter at all UE2 places, maybe the UE of the maximum of interference level associated arguments described in all UE2 is switched to the residential quarter at UE1 place.
5. method according to claim 2 is characterized in that, described step f further comprises: after described among the step f adjusted unsuccessfully, described UE1 is carried out the residential quarter switch.
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| CN104244262B (en) * | 2010-11-11 | 2018-05-11 | 华为技术有限公司 | One kind interference processing method and device |
| CN102685756B (en) * | 2011-03-11 | 2014-12-03 | 鼎桥通信技术有限公司 | Method for reducing same frequency interference of high speed downlink packet access (HSDPA) users |
| CN102412950A (en) * | 2011-11-15 | 2012-04-11 | 中兴通讯股份有限公司 | Coordination system of power of downlink control channel and method thereof |
| US9819442B2 (en) * | 2012-03-16 | 2017-11-14 | Intel Deutschland Gmbh | Internal interference signaling |
| CN103458418A (en) * | 2012-05-28 | 2013-12-18 | 中兴通讯股份有限公司 | Super housing estates and interference coordination method for super housing estates networked in common-frequency and chained manner |
| US20140169234A1 (en) * | 2012-12-14 | 2014-06-19 | Futurewei Technologies, Inc. | Systems and Methods for Interference Avoidance, Channel Sounding, and Other Signaling for Multi-User Full Duplex Transmission |
| EP3410763B1 (en) * | 2013-08-20 | 2020-07-29 | Huawei Technologies Co., Ltd. | Wireless communications apparatus and method |
| JP6277893B2 (en) * | 2014-07-08 | 2018-02-14 | ソニー株式会社 | Apparatus and method |
| CN105792222B (en) * | 2014-12-23 | 2020-02-11 | 中兴通讯股份有限公司 | Method for eliminating co-channel interference, detection method and device and base station |
| CN108243424B (en) * | 2016-12-23 | 2021-08-27 | 中国移动通信集团广东有限公司 | Method and device for determining problem cell |
| EP3596959A4 (en) | 2017-03-17 | 2020-12-16 | JRD Communication (Shenzhen) Ltd | Methods and nodes for beam adjustment |
| CN109076597B (en) * | 2018-08-10 | 2022-10-04 | 北京小米移动软件有限公司 | FBE data transmission method, device and storage medium |
| CN110798893A (en) * | 2019-09-26 | 2020-02-14 | 华为技术有限公司 | Method for solving coexistence interference and electronic equipment |
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