CN101877853A - Method for reducing same frequency interferences - Google Patents
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- CN101877853A CN101877853A CN 200910082737 CN200910082737A CN101877853A CN 101877853 A CN101877853 A CN 101877853A CN 200910082737 CN200910082737 CN 200910082737 CN 200910082737 A CN200910082737 A CN 200910082737A CN 101877853 A CN101877853 A CN 101877853A
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- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 6
- 238000013468 resource allocation Methods 0.000 abstract description 9
- 230000009467 reduction Effects 0.000 description 4
- 239000012467 final product Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- 230000006872 improvement Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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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,, then produce co-channel interference if the overlapping a plurality of UE of wave beam are distributed on the identical carrier frequency.Co-channel interference is one of most important interference source.Co-channel interference may come from this sub-district, also may come from adjacent sub-district, and more remarkable from the co-channel interference of adjacent area.
At present, the existing resources distribution method can be avoided the co-channel interference from this sub-district, in this method, radio network controller (RNC) can be in conjunction with the positional information of each UE, as arrival direction angle (AOA) information, service bandwidth according to new application resource UE need 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 of adjacent UE is this new UE Resources allocation, and the different principle of the carrier frequency 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 sub-district 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 sub-district.
But,, therefore, can not reduce co-channel interference from adjacent sub-district because the existing resources distribution method does not have the co-channel interference of consideration from adjacent sub-district when carrying out resource allocation.
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 this method can reduce the co-channel interference from this sub-district and adjacent sub-district.
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, this 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, 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, the Serving cell of judging UE1 to the Serving cell of the Antenna Beam of UE1 and arbitrary described neighboring user equipment to whether existing wave beam overlapping between the Antenna Beam of this neighboring user equipment, if execution in step c then, 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 of adjacent UE, the execution in step d if described distribution is failed, otherwise finish this method flow;
D, RNC be according to the existing resources distribution method, is the UE1 Resources allocation at the Serving cell of UE1.
Preferably, this method further comprises:
E, after UE1 enters connection status, RNC monitors in real time 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 perhaps carries out the sub-district switching to UE1 or UE2 according to the resource of different principle adjustment UE1 of the carrier frequency of adjacent UE or UE2;
In 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 perhaps carries out the sub-district to described UE1 and switches according to the resource of the different principle adjustment of the carrier frequency of adjacent UE UE1.
Preferably, the resource according to different principle adjustment UE1 of the carrier frequency of adjacent UE or UE2 is described in the step f:
RNC selects the data service rate minimum or pre-setting priority UE minimum or described interference level associated arguments maximum among UE1 and all UE2, as carrying out the target UE that resource is adjusted; According to the different principle of the carrier frequency 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 sub-district switching to UE1 or UE2.
Preferably, described in the step f UE1 or UE2 being carried out the sub-district switches to:
UE1 is switched to the sub-district of received signal code power maximum in the sub-district at all UE2 places, maybe the UE of the maximum of interference level associated arguments described in all UE2 is switched to the sub-district at UE1 place.
Preferably, described in the step f UE1 or UE2 being carried out the sub-district switches to:
UE1 is switched to the sub-district of received signal code power maximum in the sub-district at all UE2 places, maybe the UE of the maximum of interference level associated arguments described in all UE2 is switched to the sub-district at UE1 place.
Preferably, described step g further comprises: after the described adjustment failure in the step g, described UE1 is carried out the sub-district switch.
Preferably, in the described step g described UE1 being carried out the sub-district switches to:
UE1 is switched in the sub-district 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 sub-district and adjacent sub-district, thus when can the reduction system moving from the co-channel interference of this sub-district and adjacent community user 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 sub-district and adjacent sub-district 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 UE1 has the adjacent UE that is in connection status in its adjacent sub-district, then need be in the resource allocation process of subsequent step, consider to avoid adjacent UE to produce co-channel interference with this as far as possible, if and this UE1 is not in the adjacent UE of connection status in its adjacent sub-district, then only need this moment to consider to avoid the problem of co-channel interference in the same sub-district 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 that 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 avoid the appearance of this interference this moment by subsequent step, 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 gets final product for the UE1 Resources allocation.
This step, be to carry out judging under the situation that UE that UE1 may be adjacent the sub-district produces co-channel interference, 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 restriction owing to resource, and do not have enough when satisfying the resource of the different principle of carrier frequency, this distributes and can fail, at this moment, need 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 sub-district and adjacent sub-district, 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, thereby can effectively reduce the operating co-channel interference of system for this UE distributes.
In technique scheme, when the different principle of the carrier frequency of utilizing adjacent UE in the step 104 is failed for the UE1 Resources allocation, by step 102 according to existing resource allocation methods, utilize the resource of this sub-district to be the UE1 Resources allocation, because it is different that can't accomplish with the carrier frequency of the adjacent UE of adjacent sub-district 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, present embodiment can also be after this UE1 enters connection status, positional information to UE1 and adjacent UE thereof is monitored in real time, and triggering UE1 and the current separately interference level of the real-time measurement of adjacent UE thereof, and when the interference level of at least one described UE acquires a certain degree, switch or resource adjustment and the combined mode of sub-district switching by resource adjustment or sub-district, reduce the co-channel interference in system's running.Particularly, can realize by following step:
Step 201, after UE1 enters connection status, RNC monitors in real time 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 perhaps carries out the sub-district switching to UE1 or UE2 according to the resource of different principle adjustment UE1 of the carrier frequency of adjacent UE or UE2.
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 under the situation of interference level deterioration the resource adjustment of carrying out at 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, promptly can have a plurality of UE2.
Particularly, described RNC according to the different principle of the carrier frequency of adjacent UE adjust UE1 or UE2 resource can for:
RNC selects the data service rate minimum or pre-setting priority UE minimum or described interference level associated arguments maximum among UE1 and all UE2, as carrying out the object UE that resource is adjusted; According to the different principle of the carrier frequency 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 sub-district, reduce the phase mutual interference between UE by UE1 or UE2 are carried out the mode that switch the sub-district.Particularly cell switching method can for:
UE1 is switched to the sub-district of signal quality best (being the received signal code power maximum) in the sub-district at all UE2 places, maybe the UE of interference level among all UE2 the highest (being interference level associated arguments maximum) is switched to the sub-district at UE1 place.
Need to prove, in actual applications, switch with respect to the sub-district, the success rate that above-mentioned resource is adjusted is than higher, therefore, preferably, when UE1 and UE2 are in different districts, earlier the resource of UE1 or UE2 is carried out above-mentioned adjustment, when this adjusts failure, the mode that adopts above-mentioned sub-district to switch again so, can improve the reliability of co-channel interference.
Step 203, in 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 perhaps carries out the sub-district to described UE1 and switches according to the resource of the different principle adjustment of the carrier frequency of adjacent UE UE1.
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 resource only, be adjacent the different carrier frequency resource of UE, perhaps UE1 be carried out the sub-district and switch for UE1 redistributes to UE1.
In this step UE1 is carried out the concrete grammar that switch the sub-district, can determine according to actual needs, preferably, can be according to the Serving cell signal quality, UE1 is switched in the sub-district 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 sub-district, reach the purpose that reduces the phase mutual interference.
Further, similar with step 202, can also take resource adjustment and sub-district to switch the mode that combines in this step and reduce interference between UE, preferably, earlier the resource of UE1 is adjusted, if should adjust failure, then again UE1 is carried out the sub-district and switch.
By above-mentioned steps 201～203 as can be seen, 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 come the interference between the UE in service of reduction system by the mode of resource adjustment or sub-district switching or both combinations.
In sum, more than be preferred embodiment of the present invention only, be 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 (8)
1. a method that reduces co-channel interference is characterized in that, this 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, the Serving cell of judging UE1 to the Serving cell of the Antenna Beam of UE1 and arbitrary described neighboring user equipment to whether existing wave beam overlapping between the Antenna Beam of this neighboring user equipment, if execution in step c then, 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 of adjacent UE, the execution in step d if described distribution is failed, otherwise finish this method flow;
D, RNC be according to the existing resources distribution method, is the UE1 Resources allocation at the Serving cell of UE1.
2. method according to claim 1 is characterized in that, this method further comprises:
E, after UE1 enters connection status, RNC monitors in real time 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 perhaps carries out the sub-district switching to UE1 or UE2 according to the resource of different principle adjustment UE1 of the carrier frequency of adjacent UE or UE2;
In 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 perhaps carries out the sub-district to described UE1 and switches according to the resource of the different principle adjustment of the carrier frequency of adjacent UE UE1.
3. method according to claim 2 is characterized in that, the resource according to different principle adjustment UE1 of the carrier frequency of adjacent UE or UE2 described in the step f is:
RNC selects the data service rate minimum or pre-setting priority UE minimum or described interference level associated arguments maximum among UE1 and all UE2, as carrying out the target UE that resource is adjusted; According to the different principle of the carrier frequency 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 is then carried out the sub-district switching to UE1 or UE2.
5. method according to claim 2 is characterized in that, described in the step f UE1 or UE2 is carried out the sub-district and switches to:
UE1 is switched to the sub-district of received signal code power maximum in the sub-district at all UE2 places, maybe the UE of the maximum of interference level associated arguments described in all UE2 is switched to the sub-district at UE1 place.
6. method according to claim 4 is characterized in that, described in the step f UE1 or UE2 is carried out the sub-district and switches to:
UE1 is switched to the sub-district of received signal code power maximum in the sub-district at all UE2 places, maybe the UE of the maximum of interference level associated arguments described in all UE2 is switched to the sub-district at UE1 place.
7. method according to claim 2 is characterized in that, described step g further comprises: after the described adjustment failure in the step g, described UE1 is carried out the sub-district switch.
8. according to claim 2 or 7 described methods, it is characterized in that, in the described step g described UE1 carried out the sub-district and switch to:
UE1 is switched in the sub-district at neighboring user equipment place of UE1 of received signal code power maximum.
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| CN 200910082737 CN101877853B (en) | 2009-04-28 | 2009-04-28 | Method for reducing same frequency interferences |
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| CN102412950A (en) * | 2011-11-15 | 2012-04-11 | 中兴通讯股份有限公司 | System and method for coordinating power of downlink control channel |
| CN102685756A (en) * | 2011-03-11 | 2012-09-19 | 鼎桥通信技术有限公司 | Method for reducing same frequency interference of high speed downlink packet access (HSDPA) users |
| CN103312487A (en) * | 2012-03-16 | 2013-09-18 | 英特尔移动通信有限责任公司 | 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 |
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| US11211989B2 (en) | 2017-03-17 | 2021-12-28 | JRD Communication (Shenzhen) Ltd. | Methods and nodes for beam adjustment |
| CN109076597A (en) * | 2018-08-10 | 2018-12-21 | 北京小米移动软件有限公司 | Data transmission method, device and the storage medium of FBE |
| US11882583B2 (en) | 2018-08-10 | 2024-01-23 | Beijing Xiaomi Software Co., Ltd. | FBE data transmission method, apparatus, 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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