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CN101472339B - Method for coordinating district interference - Google Patents

Method for coordinating district interference Download PDF

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Publication number
CN101472339B
CN101472339B CN2007101253996A CN200710125399A CN101472339B CN 101472339 B CN101472339 B CN 101472339B CN 2007101253996 A CN2007101253996 A CN 2007101253996A CN 200710125399 A CN200710125399 A CN 200710125399A CN 101472339 B CN101472339 B CN 101472339B
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prb
enb
interference
priority
tabulation
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CN101472339A (en
Inventor
黄英
邱勇
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • Y02B60/50

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Abstract

The invention discloses a method for coordinating cell interference, which comprises the following steps: an evolution base station eNB receives an interference physical resource block PRB list, a plurality of parameters are included in the interference PRB list, the parameters include information on interference PRB users, a cell identity and a PRB identity; the evolution base station eNB judges whether the interference PRB is continuously utilized or not according to priority decision values, and the priority decision values are calculated according to the parameters. The invention further provides a base station for coordinating the cell interference, which comprises a transceiver module, a decision module and an executable module. By adopting the method and the base station for coordinating the cell interference, the cell interference coordination can be fairer and more reasonable, the frequency of the cell interference coordination is reduced, and the system performance is enhanced.

Description

A kind of method of coordinating district interference
Technical field
The present invention relates to the communications field, relate in particular to a kind of method of coordinating district interference.
Background technology
In network topology structure, as sub-district and different evolution base stations (evolved NodeB on every side, eNB) sub-district in abutting connection with the time, if the frequency of each sub-district all is the same, before system start-up, each sub-district does not plan that a starting point determines which resource is used in center of housing estate, which resource is used in cell edge, when the resource of using as sub-district A is at cell edge so,, then can cause interference if neighbor cell B also will distribute this resource.For fear of disturbing or reducing and disturb, can realize by the coordination between the eNB.This process be called coordinating district interference (Inter-cell Interference Coordination, ICIC).
(Physical Resource Block, PRB) network planning network optimization in advance provides, and does not allow mutual utilization, can avoid area interference, but can influence the capacity of system if the Physical Resource Block of cell edge.As shown in Figure 1, sub-district A and sub-district C are in the coverage of eNB1, and sub-district B and sub-district D belong to the coverage of eNB2, if sub-district A is adjacent with sub-district B, under the very heavy situation of A load, and this moment, B just in time loaded gentlyer, and A can enlarge the capacity of oneself by the PRB of " using " B sub-district.Though, stipulate that some cell edge PRB can " use " mutually or " exchange ", just can use PRB more neatly, thereby enlarge the capacity of system so we think that PRB is that prior network planning network optimization provides.
But the problem of this method is, does not use if sub-district A finds some PRBs of edge cell, and sub-district B also detects these PRBs does not simultaneously have to use, and they have used these PRBs simultaneously subsequently, will produce interference so.
At present some viewpoints are, some resource informations of exchange between adjacency eNB reach the coordination of resource by the common recognition to these resource informations, allow the sub-district of an eNB not want reprovision PRBs, and allow other eNB cell re-configuration PRB or reduce transmitting power.
Information mutual between the eNB comprises: load condition, and disturbance regime, request is the information of one's own resource not, the owner of PRB, eNB can authorize or cancel other eNB and use PRB etc.Require when an eNB receives on every side in abutting connection with these information that eNB sends, can determine to redistribute resource or minimizing transmitting power or do nothing.
It is to consider priority factors that viewpoint is arranged at present, comprising: the priority of QoS of survice, the dynamic priority in the calling, the application target priority of PRB, multimedia broadcast-multicast service (Multimedia Broadcast Multicast Service, MBMS) priority of purposes etc.
But above-mentioned priority factors makes ICIC reasonable inadequately and fair, causes frequent ICIC, waste system resource.
Summary of the invention
Goal of the invention of the present invention provides a kind of method of coordinating district interference, makes can better make a strategic decision eNB who uses and disturbs PRB, makes ICIC fairer and more reasonable, and can avoid frequent ICIC, improve resource utilization, enlarge the capacity of whole system, improved systematic function.
In view of this, the invention provides a kind of method that is used for coordinating district interference, this method comprises:
Evolution base station eNB receives disturbs Physical Resource Block PRB tabulation, comprises a plurality of parameters in this interference PRB tabulation, and this parameter comprises described interference PRB user's user profile, cell ID, PRB sign; Whether judgement continues to use described interference PRB to described eNB according to the priority decision value, and described priority decision value calculates according to described parameter.
The present invention also provides a kind of evolution base station, is used for coordinating district interference, and this evolution base station comprises: transceiver module, be used to receive the interference PRB tabulation that sends in abutting connection with eNB, and also be used for sending interference PRB tabulation to adjacency eNB; Judging module is used for each parameter value according to described interference PRB tabulation, and the different weights of each parameter correspondence, calculates the priority decision value that sends each eNB that disturbs the PRB tabulation; Executive Module is used for carrying out initialize operation according to the court verdict of described judging module.
The present invention makes eNB to carry out ICIC according to more parameter by disturbing the PRB tabulation to increase a plurality of parameters, makes ICIC fairer and more reasonable, avoids frequent ICIC, improves resource utilization, enlarges the capacity of whole system, has improved systematic function.
Description of drawings
Fig. 1 is a cell structure schematic diagram in the prior art;
Fig. 2 is the schematic flow sheet of the embodiment of the invention one;
Fig. 3 is the schematic flow sheet of the embodiment of the invention two;
Fig. 4 is the device schematic diagram of the embodiment of the invention.
Embodiment
For making goal of the invention, technical scheme and beneficial effect clearer, the specific embodiment of the present invention is elaborated below in conjunction with accompanying drawing.
Utilize the X2 interface exchange message between the eNB among the present invention, for example in load information (Load Information) or carry the information that will exchange in other message.Exchanged form can exchange for the cycle, also can be the incident exchange that reaches behind certain thresholding.
Embodiment one
Utilize X2 interface to transmit the tabulation of disturbing PRB between eNB, be illustrated in figure 1 as the flow chart of the embodiment of the invention, eNB1 and eNB2 are the evolution base stations of adjacency, and this flow process comprises:
The PRB tabulation is disturbed in step 201:eNB1 and eNB2 exchange;
Two neighbor cells that belong to these two eNB in the present embodiment respectively use this interference PRB at the same time.
As shown in table 1, this interference PRB tabulation comprises the cell information that uses this interferences PRB, the cell type difference, and the priority difference is used the user profile of interference PRB, as User Priority etc." M " expression corresponding parameters is an essential option in the table, and " O " expression corresponding parameters is an option.
Table 1
Cell ID (Cell ID) ?M
>PRB tabulation ?M
>>physics PRB identifies (PRBID) ?M
>>>uses the cell attribute of disturbing PRB ?O
>>>uses and disturbs the PRB service attribute ?O
>>>uses the native region priority that disturbs PRB ?O
>>>uses the service-user attribute list that disturbs PRB ?O
>>>>User Priority ?O More slightly divide
>>>>ARP ?O More carefully divide
>>.>preferential the frequency of using
(Information Element IE) just knows that interference has taken place which PRB to PRB ID:eNB2 according to this cell.
Use the cell attribute of disturbing PRB: this IE indicates and uses whether the sub-district of disturbing PRB is that the sub-district of disturbing PRB is used in preassignment.Whom this IE can decide preferential according to certain strategy of operator.For example, use the higher priority of cell allocation of disturbing PRB for preassignment.If eNB2 receives in the interference PRB tabulation of eNB1, the value of this IE shows that the sub-district of eNB1 is allocated in advance and use to disturb PRB, and the sub-district of eNB2 is not allocated in advance to use and disturbed PRB, and eNB2 just redistributes PRB so, do not re-use and disturb PRB, perhaps oneself reduces transmitting power.
Which business of using the service attribute that disturbs PRB: eNB2 can judge the current user of being according to this IE is being used interference PRB, and which kind of can decide professional preferential according to certain strategy of operator.If for example RT is professional preferential, receiving that the value of this IE in the interference PRB tabulation of eNB1 is RT as eNB2 so, is the NRT business and the user among the eNB2 uses, and eNB2 just redistributes PRB so, promptly do not re-use this interference PRB, perhaps oneself reduces transmitting power.
Use the native region priority of this resource: can decide which sub-district preferential according to certain strategy of operator.If eNB2 receives that this IE value is disturbed the priority height of the sub-district of PRB than the use among the eNB2 in the interference PRB tabulation of eNB1, eNB2 just redistributes PRB so, does not promptly re-use this interference PRB, perhaps oneself minimizing transmitting power.
The user property tabulation: disturb PRB if several users is used simultaneously, then this attribute can be a tabulation.For example, the User Priority in this tabulation can represent whether be VIP user, perhaps other expression users' priority indication.If eNB2 receives that the attribute of this IE in the interference PRB tabulation of eNB1 is VIP user, to disturb the user of PRB be the general user and use among the eNB2, and then eNB2 redistributes PRB, does not promptly re-use to disturb PRB, perhaps own minimizing transmitting power.This IE attribute can be divided into VIP user, general user etc. or the indication of other User Priority.
(Allocate Retention Priority ARP) is the user gradation of refinement more to allocation retention priority, can obtain from QoS of survice.The user priority that ARP priority is high uses and disturbs PRB.
The preferential frequency of using: comprise user priority uses which band frequency etc., if eNB2 receives in the interference PRB tabulation of eNB1, the frequency that user priority among the attribute representation eNB1 of this IE uses is identical with the frequency of disturbing PRB, disturb the user of PRB preferentially to use this frequency and use among the eNB2, then eNB2 does not re-use this interference PRB, and perhaps oneself reduces transmitting power.
Step 202:eNB calculates the priority decision value, judges oneself and whether preferentially uses this interference PRB, and carry out initialize operation.
Present embodiment is at RRM (Radio Resource Management, RRM) in the algorithm, be the different weights of these priority assignment, eNB calculates the priority decision value that sends the eNB that disturbs the PRB tabulation according to the priority of these parameters and the weights of distribution thereof, by comparing, if the priority decision value height of oneself then continues to use this to disturb PRB, if the priority decision value of oneself is low, then do not re-use and disturb PRB, perhaps reduce transmitting power.
In the present embodiment, the weights that not qualification system distributes for each parameter, those skilled in the art can be provided with according to actual needs.
IE by increasing newly among the present invention: use native region priority, the user property tabulation of this resource, make eNB to carry out ICIC, make ICIC fairer and more reasonable according to more parameter, avoid frequent ICIC, improve resource utilization, enlarge the capacity of whole system, improved systematic function.
Embodiment two
The embodiment of the invention by each priority in the sub-district of use disturbing PRB in the statistics sub-district number of users and carry out ICIC by network management configuration or by the shared ratio of number of users of the priority of the algorithm appointment of eNB.
Be illustrated in figure 3 as the schematic flow sheet of the embodiment of the invention 2.
The PRB tabulation is disturbed in step 301:eNB1 and eNB2 exchange;
Tabulation as shown in table 2 comprises has increased the parameters such as number of users of using User Priority in the sub-district of disturbing PRB, belonging to each User Priority among the eNB1." M " expression corresponding parameters is an essential option in the table, and " O " expression corresponding parameters is an option.
Table 2
Cell ID (Cell ID) ?M
>PRB tabulate (PRB list) ?M
>>PRB identifies (PRB ID) ?M
The cell attribute of PRB is disturbed in>use ?O
The native region priority of PRB is disturbed in>use ?O
The tabulation of>user gradation ?O These disturbed grades that get the user of PRBs
>>User Priority ?O
>>>number of users ?O
(Information Element IE) just knows that interference has taken place which PRB to PRB ID:eNB2 according to this cell.
Use the cell attribute of disturbing PRB: this IE indicates and uses whether the sub-district of disturbing PRB is that the sub-district of disturbing PRB is used in preassignment.Whom this IE can decide preferential according to certain strategy of operator.For example, use the higher priority of cell allocation of disturbing PRB for preassignment.If eNB2 receives in the interference PRB tabulation of eNB1, the value of this IE shows that the sub-district of eNB1 is allocated in advance and use to disturb PRB, and the sub-district of eNB2 is not allocated use interference PRB in advance, eNB2 just redistributes and disturbs PRB so, do not re-use this interference PRB, perhaps oneself reduces transmitting power.
Use the native region priority of this resource: can whom decide preferential according to certain strategy of operator.If eNB2 receives that this IE value is disturbed the priority height of the sub-district of PRB than the use among the eNB2 in the interference PRB tabulation of eNB1, eNB2 just redistributes PRB so, does not promptly re-use this interference PRB, perhaps oneself minimizing transmitting power.
User gradation tabulation: comprise the user's who uses this interference PRB User Priority, and to number of users that should business-level.
Step 302:eNB2 is according to the number of users of each priority in the sub-district of use disturbing PRB among the parameter eNB1, and by network management configuration or account for the ratio of the total number of users that uses this interference PRB by the number of users of the priority of the algorithm appointment of eNB.With this ratio as a new parameter, and be that each parameter distributes different weights, last eNB2 calculates the priority decision value, and determines whether preferentially using this interference PRB according to the priority decision value, and carries out initialize operation, even own priority decision value is higher, then continue to use this to disturb PRB, if the priority decision value of oneself is lower, then oneself redistributes Resource Block, promptly do not re-use this interference PRB, perhaps oneself reduces transmitting power.
In the present embodiment, the weights that not qualification system distributes for each parameter, those skilled in the art can be provided with according to actual needs.
Among the present invention by newly-increased IE: User Priority, belong to the parameters such as number of users of each User Priority, make eNB to carry out ICIC according to more parameter, make ICIC fairer and more reasonable, avoid frequent ICIC, improve resource utilization, enlarge the capacity of whole system, improved systematic function.
Simultaneously, can also take all factors into consideration the parameter that increases among embodiment 1 and the embodiment 2, these parameters are carried out permutation and combination, promptly can consider certain the several parameter among embodiment 1 and the embodiment 2 simultaneously.For example, consider " user profile priority " and " QoS of survice attribute " among the embodiment 1, " using the priority of the sub-district character of this interference PRB " or the like among the embodiment 2 simultaneously.Distribute different weights for various parameters, last COMPREHENSIVE CALCULATING goes out decision value, and this interference PRB is preferentially used in the sub-district of the eNB that the priority decision value is high.
Provide the method for several parameters selections below:
Table 3
Cell ID (Cell ID) ?M
>PRB tabulate (PRB list) ?M
>>PRB identifies (PRB ID) ?M
The cell attribute of PRB is disturbed in>use ?O
The native region priority of PRB is disturbed in>use ?O
>professional QOS tabulation ?O Use the user's who disturbs PRBs QoS of survice
>>QOS rank ?O
>>>number of users ?O
Table 4
Cell ID (CellID) ?M
>PRB tabulate (PRBlist) ?M
>>PRB identifies (PRB ID) ?M
The cell attribute of this resource of>use ?O
The native region priority of this resource of>use ?O
The priority of the sub-district character of PRBs is disturbed in>use ?O Use the community user quantity of disturbing PRBs
>>number of users ?O
Table 5
Cell ID (Cell ID) ?M
>PRB tabulate (PRB list) ?M
>>PRB identifies (PRB ID) ?M
The cell attribute of PRB is disturbed in>use ?O
The native region priority of PRB is disturbed in>use ?O
The application target priority list of>PRBs ?O Use the purpose priority of disturbing PRBs
The application target priority of>>PRBs ?O
>>number of users ?O
Table 6
Cell ID (Cell ID) ?M
>PRB tabulate (PRB list) ?M
>>PRB identifies (PRB ID) ?M
The cell attribute of PRB is disturbed in>use ?O
The native region priority of PRB is disturbed in>use ?O
>number of users ?O Use the number of users that disturbs PRBs
Table 7
Cell ID (Cell ID) ?M
>PRB tabulate (PRB list) ?M
>>PRB identifies (PRB ID) ?M
The cell attribute of PRB is disturbed in>use ?O
The native region priority of PRB is disturbed in>use ?O
>preferential the number of users that disturbs PRB place frequency range that uses ?O Use the number of users that disturbs PRBs
The effect of corresponding identical parameters is identical among the effect of each parameter in table 3, table 4, table 5 and the table 6 and embodiment 1 and the embodiment 2.
The foregoing description has been told about and has been handled the situation that the PRB interference takes place 2 adjacent eNB, and same method can be used the disturbed condition that 2 above adjacent eNB are used same PRB simultaneously.Each eNB disturbs the PRB tabulation with the adjacent eNB exchange on X2 interface.ENB just judges according to the parameter in the table that, each receives that the eNB that disturbs PRB to tabulate carries out same judgement here after receiving the interference PRB tabulation that sends in abutting connection with eNB, and determination methods is as described in the above-mentioned embodiment.Each eNB knows the disturbed condition of oneself simultaneously and in abutting connection with the disturbed condition of eNB, judges according to the priority decision value at last like this.As long as the priority decision value of oneself is lower than the priority decision value of any one other eNB, oneself just redistributes Resource Block so, does not promptly re-use this interference PRB, and perhaps oneself reduces transmitting power.If the priority decision value of oneself is the highest, then continue to use this to disturb PRB.
The weights that not qualification of enforcement system among the present invention distributes for each parameter, those skilled in the art can be provided with according to actual needs.
Present technique field personnel can select to consider that different parameter configuration is to carry out effective I CIC according to real needs, take all factors into consideration these factors, and distribute different weights according to demand, help to carry out more rationally and liberally ICIC, improve resource utilization, enlarge the capacity of whole system, improved systematic function.
The present invention also provides a kind of base station, comprises transceiver module, judging module, Executive Module.
Transceiver module 401: be used to receive the interference PRB tabulation that sends in abutting connection with eNB, also be used for sending interference PRB tabulation to adjacency eNB, this tabulation can be passed through X2 interface, is carried at existing message, as load information, or sends in other message.
Judging module 402: according to each parameter value in the interference PRB tabulation, and the different weights of each parameter correspondence, calculate the priority decision value that sends each eNB that disturbs the PRB tabulation.
Executive Module 403: the court verdict according to judging module 402 is carried out initialize operation, even the priority decision value of oneself is not the highest, then redistribute PRB, promptly do not re-use this interference PRB, perhaps reduce transmitting power, if the priority decision value of oneself is the highest, then continue to use this to disturb PRB.
It more than is method to a kind of public or limited accass provided by the present invention, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (8)

1. the method for a coordinating district interference is characterized in that, this method comprises,
Evolution base station eNB receives disturbs Physical Resource Block PRB tabulation, comprises a plurality of parameters in this interference PRB tabulation, and this parameter comprises the user's of described interference PRB information, cell ID, PRB sign;
Whether judgement continues to use described interference PRB to described eNB according to the priority decision value, and described priority decision value calculates according to described parameter.
2. the method for claim 1, it is characterized in that the parameter in the described interference PRB tabulation also comprises: uses the frequency of the cell attribute of described interference PRB, the service attribute that uses described interference PRB, the native region priority that uses described interference PRB, allocation retention priority ARP, preferential use or belong in the number of users of each User Priority any one.
3. method as claimed in claim 2 is characterized in that, described user's information comprises: User Priority or number of users.
4. method as claimed in claim 2 is characterized in that, described eNB statistics accounts for the ratio of the total number of users that uses described interference PRB by network management configuration or by the number of users of the priority of the algorithm appointment of eNB, and with this ratio as one of above-mentioned parameter.
5. as any described method of claim among the claim 1-4, it is characterized in that described eNB is that each parameter in the described PRB tabulation is distributed weights.
6. method as claimed in claim 5 is characterized in that, whether judgement continues to use described interference PRB to be specially to described eNB according to the priority decision value:
According to described parameter and described weights calculating priority level decision value;
If the priority decision value of described eNB is the highest, then described eNB continues to use described interference PRB;
Otherwise then described eNB does not re-use described interference PRB, perhaps reduces transmitting power.
7. an evolution base station is characterized in that, this base station comprises:
Transceiver module is used to receive the interference PRB tabulation that sends in abutting connection with eNB, also is used for sending interference PRB tabulation to adjacency eNB;
Judging module is used for each parameter value according to described interference PRB tabulation, and the different weights of each parameter correspondence, calculates and sends the described priority decision value in abutting connection with eNB that disturbs the PRB tabulation; With
Executive Module is used for carrying out initialize operation according to the court verdict of described judging module.
8. a kind of evolution base station as claimed in claim 7 is characterized in that,
Described initialize operation is specially: if the priority decision value maximum of described eNB, then described eNB continues to use described interference PRB; Otherwise described eNB does not re-use described interference PRB, perhaps reduces transmitting power.
CN2007101253996A 2007-12-25 2007-12-25 Method for coordinating district interference Expired - Fee Related CN101472339B (en)

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