CN101877854A - Method for reducing same frequency interferences - Google Patents
Method for reducing same frequency interferences Download PDFInfo
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- CN101877854A CN101877854A CN2009100827386A CN200910082738A CN101877854A CN 101877854 A CN101877854 A CN 101877854A CN 2009100827386 A CN2009100827386 A CN 2009100827386A CN 200910082738 A CN200910082738 A CN 200910082738A CN 101877854 A CN101877854 A CN 101877854A
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Abstract
The invention discloses a method for reducing same frequency interferences, which comprises the following steps of: when UE1 enters a connection state, performing real-time monitoring on position information of the UE1 by RNC, and according to the position information, determining whether the UE1 has an adjacent UE in the connection state currently, if so, triggering a real-time measurement of the UE1 and the UE in the connection state and reporting the current interference level related parameters; when at least one UE in the UE1 and the UE in the connection state meets a preset condition, judging whether a speed reducible service exists in services of all the UE meeting the preset condition by the RNC, if so, selecting more than one speed reducible service to reduce the service rate, wherein the preset condition is that the interference level related parameters reported by the UE are greater a preset threshold value during a preset time; and according to the reduced service rate, performing resource adjustment on the UE corresponding to the service with the reduced service rate. The method can effectively reduce the same frequency interferences in system operation.
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.In addition, after system operation, because the variation of wireless environment, can make that the interference level of each UE changes in the system, this shows, the existing method that reduces co-channel interference by resource allocation is co-channel interference with can not reducing system's generations in service effectively.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that can effectively reduce co-channel interference.
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 may further comprise the steps:
A, after user equipment (UE) 1 enters connection status, radio network controller (RNC) is monitored in real time to the positional information of UE1, and determine according to this positional information that UE1 is current and whether have the neighboring user equipment that is in connection status, if, then trigger UE1 and its neighboring user equipment that is in connection status and measure and report current interference level associated arguments in real time, described interference level associated arguments is Interference Signal Code Power ISCP or error rates of data BLER;
B, when being in the neighboring user equipment of connection status at UE1 and its, at least one subscriber equipment satisfies when pre-conditioned, but RNC judges in the business satisfy described pre-conditioned all subscriber equipmenies whether have the reduction of speed business, described pre-conditioned be the described interference level associated arguments of this user equipment to report in Preset Time greater than predetermined threshold value, if, then change step c over to, otherwise, this method flow withdrawed from;
But c, select more than one professional its service rate that reduces of described reduction of speed; According to the service rate after reducing, for the professional pairing subscriber equipment that is lowered service rate carries out the adjustment of resource.
In sum, the method of the reduction co-channel interference that the present invention proposes, when system moves by selecting the business that some can reduction of speed to carry out reduction of speed, adjust the resource of UE then based on the service rate behind the reduction of speed, can rise to this UE distribution and be adjacent the possibility that subscriber equipment does not produce the resource of co-channel interference, thereby can effectively reduce the operating co-channel interference of system.
Description of drawings
Fig. 1 is the schematic flow sheet 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.
In actual applications, there are some business that can reduce service rate such as background and interactive service (BE business), stream business etc., if and reduce these professional speed of UE, even it is still overlapping at time slot and carrier frequency that the resource of this UE is adjacent the resource of UE, the interference that produces between adjacent UE also can descend; In addition, behind the professional reduction of speed, the corresponding minimizing of bandwidth that needs, at this moment, by the heavily distribution of resource, making this UE be adjacent the possibility that UE takies different time-gap or carrier frequency resource will increase, and can reduce the interference level of this UE so effectively.
Based on this, main thought of the present invention is: in service in system, UE and its adjacent UE that is in connection status that triggering is in connection status measure and report current interference level respectively in real time, the interference level that reports as described UE is during greater than preset threshold value, but then pass through the speed of the reduction of speed business of the high UE of the described interference level of reduction, and carry out the distribution of resource for UE correspondingly again according to the speed after reducing, to reduce the interference level of these UE.
Fig. 1 is the schematic flow sheet of the embodiment of the invention one, and as shown in Figure 1, this embodiment one mainly comprises:
Here, described pre-conditioned can for the described interference level associated arguments of this user equipment to report in Preset Time greater than predetermined threshold value.
In actual applications, based on traffic performance, but described reduction of speed business can be background and interactive service (BE business) or stream business etc.Concrete which kind of business of selecting is carried out reduction of speed, can run situation and traffic performance is determined according to reality.In the present embodiment, but described reduction of speed business is the BE business.
Further, before carrying out described judgement, can also elder generation switch in this step by taking resource adjustment or sub-district, or the two mode that combines, reduce co-channel interference, switch when losing when described resource adjustment or sub-district, come the operating co-channel interference of reduction system by the mode of business being carried out reduction of speed again, like this, can avoid influencing user experience owing to the reduction of service rate as far as possible, during specific implementation, increase the executive condition of a described judgement in this step, described executive condition is:
RNC is according to the different principle of the carrier frequency of adjacent UE, adjust UE1 or satisfy the resource of described pre-conditioned neighboring user equipment, perhaps to UE1 or satisfy described pre-conditioned neighboring user equipment and carry out the sub-district and switch, when described adjustment or described sub-district handoff failure, carry out described judgement;
Perhaps be:
RNC is according to the different principle of the carrier frequency of adjacent UE, adjust UE1 or satisfy the resource of described pre-conditioned neighboring user equipment, if described adjustment failure, then to UE1 or satisfy described pre-conditioned neighboring user equipment and carry out the sub-district and switch, if described sub-district handoff failure is then carried out described judgement.
Need to prove that described resource adjustment is compared to described sub-district and switches, its success rate is than higher, therefore, adopting two kinds of means in combination during mode, adopts the mode that switch the sub-district after the first resource adjustment preferable.By described executive condition, can be because of there not being enough resources can't carry out the resource adjustment, or during the handoff failure of sub-district, reduce co-channel interference by reducing service rate.
Wherein, described adjustment UE1 or the resource that satisfies described pre-conditioned neighboring user equipment are:
RNC selects UE1 and satisfies the data service rate minimum or pre-setting priority subscriber equipment minimum or described interference level associated arguments maximum in the described pre-conditioned neighboring user equipment, 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.
Described to UE1 or satisfy described pre-conditioned neighboring user equipment and carry out the sub-district and switch to:
UE1 is switched to the best sub-district of signal quality in the Serving cell that satisfies described pre-conditioned neighboring user equipment place, maybe will satisfy the highest Serving cell that switches to the UE1 place of interference level associated arguments described in the described pre-conditioned neighboring user equipment.
But step 103, select more than one professional its service rate that reduces of described reduction of speed.
Particularly, this step can realize as follows:
According to the order of interactive service after the first background service, but described reduction of speed business is sorted;
But from the described reduction of speed business after the ordering, but select more than one reduction of speed business, and, reduce the speed of selected business according to default reduction of speed mode;
Described default reduction of speed mode is for directly being reduced to the minimum-rate on the dedicated channel or directly forwarding the PCH state to or the mode of changing down step by step.
In said method, described default reduction of speed mode is used to be provided with the targeted rate of reduction of speed, and this targeted rate can be provided with according to actual needs, for example, if wish to reach fast the purpose of reduction of speed, then can directly be reduced to the minimum-rate on the dedicated channel, even directly forward the PCH state to; If wish slow reduction of speed, changing down step by step then.
In this step, by the professional pairing subscriber equipment behind the reduction of speed is carried out the distribution of resource again, reduce this co-channel interference, preferably, this step can realize according to following method:
According to the described service rate behind the reduction of speed,, but be the professional corresponding user equipment allocation resource of selected reduction of speed again according to the principle of priority allocation and neighboring user hold facility different time-gap or frequency resource.
Here,, avoid to produce the resource of co-channel interference as far as possible, reduce the validity of co-channel interference with further raising for the professional pairing user equipment allocation behind the reduction of speed by the resource of priority allocation and neighboring user hold facility different time-gap or frequency.
Further, reduce effects of jamming in order to improve present embodiment, at UE during to system's application resource, adopting following method is its Resources allocation, avoid distributing the resource of generation co-channel interference between the adjacent UE that makes its and this sub-district and adjacent sub-district, with the operating co-channel interference of minimizing system for this UE as far as possible.Concrete resource allocation flow process can comprise:
Step x1, as UE1 during to system's application resource, RNC is according to the current location information of UE1, judge in the neighbor cell of UE1 and whether have the neighboring user equipment that is in connection status, if, execution in step x2 then, otherwise, according to the existing resources distribution method, Serving cell at UE1 is the UE1 Resources allocation, finishes this resource allocation flow process.
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.
Step x2, 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 x3 then, otherwise according to the existing resources distribution method, Serving cell at UE1 is the UE1 Resources allocation, finishes this resource allocation flow process.
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.
Step x3, 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 x4 if described distribution is failed, otherwise finish this resource allocation flow process.
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 distribution may be failed, can be the UE1 Resources allocation according to the existing resources distribution method under this situation, and then carry out subsequent step after the connection status by this UE, reduce co-channel interference.
Step x4, RNC be according to the existing resources distribution method, is the UE1 Resources allocation at the Serving cell of UE1.
From technique scheme as can be seen, when the present invention moves in system by selecting the business that some can reduction of speed to carry out reduction of speed, and then adjust the resource of UE based on the service rate behind the reduction of speed, like this, can rise to the UE distribution and be adjacent the possibility that subscriber equipment does not produce the resource of co-channel interference, thereby can effectively reduce the operating co-channel interference of system.In addition, when resource allocation, according to the different principle of the carrier frequency of adjacent UE, for distributing, UE is adjacent the resource that subscriber equipment takies different time-gap or frequency, the co-channel interference when minimizing system further moves by preferential.
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 (7)
1. a method that reduces co-channel interference is characterized in that, this method may further comprise the steps:
A, after user equipment (UE) 1 enters connection status, radio network controller (RNC) is monitored in real time to the positional information of UE1, and determine according to this positional information that UE1 is current and whether have the neighboring user equipment that is in connection status, if, then trigger UE1 and its neighboring user equipment that is in connection status and measure and report current interference level associated arguments in real time, described interference level associated arguments is Interference Signal Code Power ISCP or error rates of data BLER;
B, when being in the neighboring user equipment of connection status at UE1 and its, at least one subscriber equipment satisfies when pre-conditioned, but RNC judges in the business satisfy described pre-conditioned all subscriber equipmenies whether have the reduction of speed business, described pre-conditioned be the described interference level associated arguments of this user equipment to report in Preset Time greater than predetermined threshold value, if, then change step c over to, otherwise, this method flow withdrawed from;
But c, select more than one professional its service rate that reduces of described reduction of speed; According to the service rate after reducing, for the professional pairing subscriber equipment that is lowered service rate carries out the adjustment of resource.
2. method according to claim 1 is characterized in that, further comprises a resource allocation flow process before the described step a, and described resource allocation flow process comprises:
X1, as UE1 during to system's application resource, RNC is according to the current location information of UE1, judge in the neighbor cell of UE1 and whether have the neighboring user equipment that is in connection status, if, execution in step x2 then, otherwise, according to the existing resources distribution method, Serving cell at UE1 is the UE1 Resources allocation, finishes this resource allocation flow process;
X2, 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 x3 then, otherwise according to the existing resources distribution method, Serving cell at UE1 is the UE1 Resources allocation, finishes this resource allocation flow process;
X3, 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 x4 if described distribution is failed, otherwise finish this resource allocation flow process;
X4, RNC be according to the existing resources distribution method, is the UE1 Resources allocation at the Serving cell of UE1.
3. method according to claim 1 is characterized in that step b further comprises the executive condition of a described judgement, and described executive condition is:
RNC is according to the different principle of the carrier frequency of adjacent UE, adjust UE1 or satisfy the resource of described pre-conditioned neighboring user equipment, perhaps to UE1 or satisfy described pre-conditioned neighboring user equipment and carry out the sub-district and switch, when described adjustment or described sub-district handoff failure, carry out described judgement;
Perhaps be:
RNC is according to the different principle of the carrier frequency of adjacent UE, adjust UE1 or satisfy the resource of described pre-conditioned neighboring user equipment, if described adjustment failure, then to UE1 or satisfy described pre-conditioned neighboring user equipment and carry out the sub-district and switch, if described sub-district handoff failure is then carried out described judgement.
4. method according to claim 3 is characterized in that, described adjustment UE1 or the resource that satisfies described pre-conditioned neighboring user equipment are:
RNC selects UE1 and satisfies the data service rate minimum or pre-setting priority subscriber equipment minimum or described interference level associated arguments maximum in the described pre-conditioned neighboring user equipment, 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.
5. method according to claim 3 is characterized in that, and is described to UE1 or satisfy described pre-conditioned neighboring user equipment and carry out the sub-district and switch to:
UE1 is switched to the best sub-district of signal quality in the Serving cell that satisfies described pre-conditioned neighboring user equipment place, maybe will satisfy the highest Serving cell that switches to the UE1 place of interference level associated arguments described in the described pre-conditioned neighboring user equipment.
6. according to the described arbitrary method of claim 1 to 5, it is characterized in that, but more than one professional its service rate that reduces of described reduction of speed of the described selection among the step c is:
According to the order of interactive service after the first background service, but described reduction of speed business is sorted;
But from the described reduction of speed business after the ordering, but select more than one reduction of speed business, and, reduce the speed of selected business according to default reduction of speed mode;
Described default reduction of speed mode is for directly being reduced to the minimum-rate on the dedicated channel or directly forwarding the PCH state to or the mode of changing down step by step.
7. method according to claim 1 is characterized in that, described in the step c according to the service rate after reducing, for the professional pairing subscriber equipment that is lowered service rate carries out being adjusted into of resource:
According to the described service rate behind the reduction of speed,, but be the professional corresponding user equipment allocation resource of selected reduction of speed again according to the principle of priority allocation and neighboring user hold facility different time-gap or frequency resource.
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| CN 200910082738 CN101877854B (en) | 2009-04-28 | 2009-04-28 | Method for reducing same frequency interferences |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104284406A (en) * | 2013-07-04 | 2015-01-14 | 京信通信系统（中国）有限公司 | Terminal speed adjusting method, system and equipment |
| CN112804666A (en) * | 2019-11-13 | 2021-05-14 | 成都鼎桥通信技术有限公司 | Gateway interference control method and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013915A (en) * | 2007-01-17 | 2007-08-08 | 倪明 | Method for eliminating co-channel interference TD-SCDMA system |
| CN101286786B (en) * | 2007-04-11 | 2013-03-20 | 中兴通讯股份有限公司 | Method for inhibiting interference during identical networking by scheduling |
| CN101365224B (en) * | 2007-08-07 | 2011-09-07 | 鼎桥通信技术有限公司 | Method and apparatus reducing interference between adjacent cells |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104284406A (en) * | 2013-07-04 | 2015-01-14 | 京信通信系统（中国）有限公司 | Terminal speed adjusting method, system and equipment |
| CN112804666A (en) * | 2019-11-13 | 2021-05-14 | 成都鼎桥通信技术有限公司 | Gateway interference control method and device |
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| CN101877854B (en) | 2013-01-16 |
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