CN101917727A - LTE (Long Term Evolution) system interference coordination method - Google Patents
LTE (Long Term Evolution) system interference coordination method Download PDFInfo
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Abstract
The invention discloses an LTE (Long Term Evolution) system interference coordination method, which comprises the steps of: dividing a subdistrict into a central district and a marginal district, wherein the central district can occupy all frequency resources of the system; and dividing the marginal district into six marginal sections which respectively occupy different sub-bands and the total frequency resource of the system. When the frequency of a certain marginal section is saturated, available resources of the sub-bands of other marginal sections in the subdistrict is looked up and called through preset priority. In the invention, the interference among subdistricts is reduced and the frequency spectrum use ratio is increased through the mutual coordination technical scheme among subdistricts, and the performance of marginal users, the throughput of the whole subdistrict and the service quality performance of marginal users of the subdistrict are improved.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to the method that a kind of LTE system interference is coordinated.
Background technology
At present, based on OFDM (OFDM, Orthogonal Frequency DivisionMultiplexing) system has been applied to moving communicating field, it has availability of frequency spectrum advantages of higher, and 3GPP LTE (Long Term Evolution) adopts the core technology of this technology as it.
For operator, the most important performance index of wireless access technology and access network are that the availability of frequency spectrum and professional QoS (Quality of Service) ensure.And the LTE system has also proposed its availability of frequency spectrum is 2～4 times the performance index of HSPA (High-Speed Downlink Packet Access).It is OFDM (Orthogonal Frequency Division Multiplexing) technology that LTE adopts core technology, does not have the interference between sub-district (cell) to suppress mechanism in the technology of its physical layer.Because the target transmission speed that LTE formulates is the up 50Mbit/s of descending 100Mbit/s, the transmission speed of this speed is very high as can be seen from data, but LTE corresponding bandwidth resource but seldom, has only the bandwidth resources of 20M.Therefore, in order to reach the transmission rate of setting, the multiplexing factor of frequency is equaled or approach 1.
Certainly this is desirable multiplexing coefficient, because when the multiplexing coefficient of sub-district is 1, neighbor cell is owing to use identical frequency resource, can produce sizable interference, quality of services for users in the sub-district (QoS) can't be protected, and in the worst case, can't work normally in the base station of sub-district.This shows that making multiplexing coefficient is 1, the inevitable co-channel interference of having brought in order to solve this two opposed contradictions, must be coordinated the frequency resource and the power resource of sub-district.Prevent the appearance of area interference, and improve the throughput of sub-district to greatest extent.
Because identical frequency spectrum resource is used in adjacent sub-district, brought in the sub-district and presence of intercell interference (ICI, Inter-Cell Interference) problem, as shown in Figure 1, user UE1 is because nearer apart from this base station eNB 1 (evolution base station), eNB2 is far away apart from interference base station, so its interference is less.But UE2 is owing to two base station distance approximately equals, if use identical channel, disturb just bigger so.In the system that adopts the OFDMA technology because the mutually orthogonal relation of interchannel, between the user the sub-district in interference very little, can ignore basically.The interference of minizone just becomes a problem demanding prompt solution, and present 3G cell mobile communication systems is also being deposited same problem.Aspect the transfer rate of data, there is sizable difference the fringe region of sub-district and the central area of sub-district, and the performance of Cell Edge User can be subjected to very big loss.
At the inhibition technology of minizone frequency interferences, the researcher has proposed a lot of schemes both at home and abroad, and these technology can be divided three classes: interference randomization, interference cancellation and interference coordination.The interference that has been albefaction of interference randomization technology does not truly reduce interference signal.Studies show that this technology of single application can not satisfy the requirement of future mobile communication system signal to noise ratio.
Disturbing the cancellation technology is to utilize gain to disturb the technology of compacting, but its realization condition strictness, and complexity is also higher, and can only eliminate some strong interferers, so this technology is less in practice is employed.
Interference coordination technique realizes simple, and is satisfactory for result, becomes very soon and reduces the most important technology of area interference.The interference coordination technique of minizone can be divided into three kinds of static coordination, semi-static coordination and full dynamic coordinates: the used Radio Resource in each sub-district uses by the scheme of distributing in advance fully and is static coordination; Can partly change according to different situations and be semi-static coordination; There is not prior allocative decision then to be full dynamic coordinate.Full dynamic coordinate signaling consumption is bigger, also is in conceptual phase at present.The static coordination signaling consumption is less, but underaction is difficult to solution of emergent event, and the effective QoS guarantee can not be provided.Semi-static coordination can be made suitable adjustment according to the variation of load on pre-distribution scheme.Studies show that compare with the single static coordination method of routine, semi-static coordination can improve 10%～50% cell edge throughput.
Summary of the invention
The invention provides the method that a kind of LTE system interference is coordinated, by the minizone mutual coordination technical scheme, reduce the interference of minizone and improve the availability of frequency spectrum, simultaneously, improve the throughput of marginal user performance and whole sub-district, and improve the QoS performance of Cell Edge User.
The method that a kind of LTE system interference is coordinated comprises:
(1) each microzonation is divided into central area and fringe region, and fringe region is divided into 6 sectors, edge around the central area;
To the path loss p1 of this community user and nearest neighbor cell path loss p2, calculate the difference p2-p1 of two path losses according to the base station to this user, with default path loss threshold value x relatively.If p2-p1＞x, then this user is positioned at the central area; If p2-p1＜x, then this user is positioned at fringe region; If p2-p1=x, then this user is positioned on the border of central area and fringe region.User at boundary can incorporate the fringe region user into, also can incorporate the central area user into, and system determines voluntarily according to the size of load, for example can divide the central area user into when the fringe region resource is nervous.Then fringe region is divided into sector, 6 edges.
(2), and distribute to community user with system's available frequencies resource grouping;
With system's available frequencies resource division is six sub-frequency bands f1, f2, f3, f4, f5 and f6, f1=f2=f3 wherein, f4=f5=f6, represent first three sub-frequency bands f1, f2 and f3 shared ratio in whole frequency resource with R%, it can carry out semi-static or dynamic adjustment according to information such as the number of users of sub-district, type service, service quality.
Frequency resource in the sub-district on user's using system whole frequency band of central area promptly can be used all six sub-frequency bands.
For fringe region, six sub-frequency bands are distributed to sector, six edges respectively, a sub-frequency bands is used in each sector, edge, makes in all sub-districts arbitrarily that adjacent sector, two edges takies two different sub-bands, reduces co-channel interference.
(3) when saturated running appears in the frequency resource of sector, edge, need carry out frequency scheduling to it;
Because sector, an edge has only taken a sub-frequency bands, when saturated running appears in certain sector, edge, need dispatch the frequency band of sector, edge.Because the central area can take all frequency resources, promptly the whole 20M bandwidth resources of LTE system generally do not need the frequency of central area is dispatched.
For fringe region, the sector, six edges in this zone is divided into two classes, the first kind is for using the sector, three edges of sub-band f1, f2 and f3, and second class is for using the sector, three edges of sub-band f4, f5 and f6.When saturated running appearred in the sub-band in the sector, first kind edge, the scaling up factor R % of system distributed to this sector, three edges more frequency resources, used needs to satisfy, and adjusting range can not be excessive, satisfied running and got final product.When saturated working order disappeared, the value of R will in time be adjusted back initial value.
When saturated running appears in certain sector, the edge sub-band in the sector, the second class edge, this sector, edge can conduct interviews according to the preset priority order successively to the sub-band of other sectors, edge, this sub-district, priority is the adjacent sector, first kind edge, sector, edge from calling frequency resource with needs, call the frequency resource of sector, first kind edge smoothly successively according to clockwise or inverse clock, guarantee the normal operation of this sector, edge.
The present invention has planned the using method of sub-district usable frequency, frequency resource adjusted flexibly, and with the variation that contains of reply sub-district, the flexibility that has improved cell resource scheduling, the while has effectively been avoided the co-channel interference of minizone.
Description of drawings
Fig. 1 is the presence of intercell interference schematic diagram;
Fig. 2 is the schematic diagram that the sub-district is divided;
Fig. 3 is that frequency resource is divided schematic diagram;
Fig. 4 is a frequency scheduling priority schematic diagram.
Embodiment
Further specify technical scheme of the present invention below in conjunction with accompanying drawing:
The method that a kind of LTE system interference is coordinated comprises:
(1) microzonation is divided into central area and fringe region;
As shown in Figure 2, a regular hexagon is a sub-district among the figure, and orthohexagonal center is the base station of this sub-district.Because area interference is mainly derived from the interference of neighbor cell to this cell edge region, so the sub-district is divided into central area and two parts of fringe region, the central area is the border circular areas in the regular hexagon, and fringe region is the shadow region outside the circle.With sub-district 1 is example, and sub-district 2 and sub-district 3 are its neighbor cell.Central area in the sub-district 1 is for being the circular institute area surrounded in the center of circle with the base station, definite method of circular radius is: represent a user in the sub-district 1 more arbitrarily, the base station of this sub-district 1 is p1 to this user's path loss, with the path loss p2 of the nearest neighbor cell of user to this user, and calculate the difference p2-p1 of two path losses by the eNB of this sub-district, with default path loss threshold value x relatively, the big I of x value is defined when the networking by system, different sub-districts can be inconsistent.If p2-p1＞x, then this user is positioned at the central area; If p2-p1＜x, then this user is positioned at fringe region; If p2-p1=x, then this user is positioned on the border of central area and fringe region, can incorporate the fringe region user into the user of boundary, also can incorporate the central area user into, system can determine voluntarily according to the size of load, for example divides the central area user when the fringe region resource is nervous into.
(2), and distribute to community user with system's available frequencies resource grouping;
As shown in Figure 3, with system's available frequencies resource division is six sub-frequency bands, f1, f2, f3, f4, f5 and f6, bandwidth f1=f2=f3 wherein, f4=f5=f6, f1 〉=f4, R% represent first three sub-frequency bands f1, f2 and f3 shared ratio in whole frequency resource, and it can carry out semi-static or dynamic adjustment according to information such as the number of users of sub-district, type service, service quality.
Because much smaller than the path loss of neighbor cell base station to it, it is very little that then the center intra domain user is subjected to the interference of neighbor cell to central area user's path loss for the base station in the sub-district, the frequency resource of the user in this central area on can the using system whole frequency band.
Fringe region for the sub-district, be divided into sector, six edges according to as shown in Figure 2 mode, be not denoted as A, B, C, D, E, F, wherein the area of A, B, C equates, the area of D, E, F equally, the former area is smaller or equal to latter's area, i.e. A≤D, and the ratio that D, E, F area sum account for whole fringe region area also is R%.Six sub-frequency bands are distributed to this sector, six edges use, the method for salary distribution is (division of each inward flange sector, sub-district is all identical with the distribution of frequency):
| The sector, edge | Employed sub-band |
| A | f5 |
| B | f6 |
| C | f4 |
| D | f3 |
| E | f2 |
| F | f1 |
Edge region can be given the bigger more frequency resource of region allocation of user distribution density according to the difference of user distribution density, gives the less less relatively frequency resource of region allocation of user distribution density.Guarantee the neighbour zone of three neighbor cells according to the frequency distributing mode in the last table, especially three sub-districts all have the regional employed frequency resource of overlapping all inconsistent, sector, the edge employed frequency resource of B as sector, the edge C of sector, the edge A of sub-district among Fig. 21, sub-district 2, sub-district 3 is inconsistent, reduce the interference in these zones, and make that these regional frequency duplex factor as one are 1/3 as far as possible.
Because sector, an edge has only taken a sub-frequency bands, when saturated running appears in certain sector, edge, need dispatch the frequency band of sector, edge.Because the central area can take all frequency resources, promptly the whole 20M bandwidth resources of LTE system generally do not need the frequency of central area is dispatched.
For fringe region, the sector, six edges in this zone is divided into two classes, the first kind is sector, edge D, E, F, second class is sector, edge A, B, C.When saturated running appearred in the sub-band in the sector, first kind edge, the scaling up factor R % of system distributed to this sector, three edges more frequency resources, used needs to satisfy.When saturated working order disappeared, the value of R will in time be adjusted back initial value.The R initial value is determined when networking, is generally 50～90.
When saturated running appears in certain sector, the edge sub-band in the sector, the second class edge, this sector, edge can conduct interviews according to the preset priority order successively to the sub-band of other sectors, edge, this sub-district, inquire about other sector, edge whether available resource is arranged, and call the available frequencies resource, guarantee the normal operation of this sector, edge.
As shown in Figure 4, the frequency scheduling priority of sector, edge A is A, D, F, E, C, B.When the use of sub-band f5 in the A of sector, edge was saturated, sector, edge A at first visited sector, edge D, checked whether the sub-band f3 in the D of sector, edge also has available resources, if having, then used the available resources in this sub-band f3.Otherwise, continue visit sector, edge F.So visit other sectors, edge of this sub-district successively according to default priority.
Equally, the frequency scheduling priority of sector, edge B is B, E, D, F, A, C, and the frequency scheduling priority of sector, edge C is C, F, E, D, B, A.
The value of the adjusting R that system is semi-static helps to increase the jamproof flexibility of cell edge, but also can adapt to the continuous variation of cell edge area number of users.The sector, edge is divided into two classes, at first between the inhomogeneity sector, call when calling, for example among Fig. 2, though sector, edge C, A,, B, occur simultaneously calling, the priority by each sector, edge pre-defines disturbed condition can not occur yet.Occur disturbing in cell edge region in the time of can avoiding calling to greatest extent like this.
Because the limited bandwidth of LTE system, if to all sectors, edge all proportionally the factor regulate, increase the sub-band of certain sector, edge, must compress the sub-band of other sectors, edge, concerning whole system, frequency is used not too big improvement.If priority is all set in all sectors, edge, continuous recursive call appears easily, makes among the system handles confusion.Therefore, the sector, edge is divided into two classes carries out different frequency scheduling processing, the frequency resource of whole system can obtain optimized use, and effectively reduces the interference between the neighbor cell.
Claims (4)
1. the method coordinated of a LTE system interference may further comprise the steps:
(1) each microzonation is divided into central area and fringe region, and fringe region is divided into six sectors, edge around the central area, sector, six edges on average is divided into two groups, sector, first group of edge and sector, second group of edge are provided with at interval;
(2) frequency resource with system is divided into six sub-frequency bands, and the central area takies all sub-bands, and each sector, six edges, sub-district takies six different sub-bands, and any adjacent sector, two edges takies two different sub-bands in all sub-districts;
(3) when the sector, arbitrary edge in the sector, first group of edge, arbitrary sub-district is saturated, simultaneously all sectors, first group of edge, sub-district of corresponding raising account for the ratio of all frequency resources, make in all sub-districts that adjacent sector, two edges takies two different sub-bands arbitrarily;
(4) when the sector, arbitrary edge in the sector, second group of edge, arbitrary sub-district is saturated, frequency resource in this sector, first group of edge, sub-district is called by preset priority in this saturated sector, edge.
2. the method that LTE system interference according to claim 1 is coordinated is characterized in that, the division methods of central area and fringe region is in the middle sub-district of described step (1):
Base station in this sub-district is p1 to user's path loss, with nearest sub-district, sub-district be p2 to this user's path loss,
If p2-p1＞x, then the zone at this user place is the central area of this sub-district;
If p2-p1＜x, then the zone at this user place is the fringe region of this sub-district;
If p2-p1=x, then the zone at this user place is the central area of this sub-district and the border of fringe region, and wherein x is default path loss threshold value.
3. the method that LTE system interference according to claim 1 is coordinated is characterized in that, the free time occurs when saturated sector, edge in the described step (3), and the ratio that all sectors, first group of edge, sub-district is accounted for all frequency resources returns to original value.
4. the method that LTE system interference according to claim 1 is coordinated, it is characterized in that, described step (4) medium priority is: from the adjacent sector, first group of edge, sector, edge of calling frequency resource with needs, call the frequency resource of sector, first group of edge smoothly successively according to clockwise or inverse clock.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790969A (en) * | 2011-05-16 | 2012-11-21 | 普天信息技术研究院有限公司 | Method for allocating border frequency bands in upstream interference |
| CN102857928A (en) * | 2011-06-29 | 2013-01-02 | 普天信息技术研究院有限公司 | Uplink interference coordination method |
| CN102857929A (en) * | 2011-06-29 | 2013-01-02 | 普天信息技术研究院有限公司 | Interference coordinating method of sectorized common-frequency networking communication system |
| CN104902484A (en) * | 2014-03-04 | 2015-09-09 | 中国电信股份有限公司 | LTE inter-cell interference coordination method and device |
| CN105959959A (en) * | 2016-06-16 | 2016-09-21 | 北京汇通金财信息科技有限公司 | Base station and interference coordination method in base station horizontal networking system |
| CN107431928A (en) * | 2015-03-31 | 2017-12-01 | 三菱电机株式会社 | Frequency assigning apparatus, managing device, wireless main website, wireless terminal, communication system and frequency allocation method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050058151A1 (en) * | 2003-06-30 | 2005-03-17 | Chihsiang Yeh | Method of interference management for interference/collision avoidance and spatial reuse enhancement |
| CN101009541A (en) * | 2006-01-23 | 2007-08-01 | 华为技术有限公司 | Disturbance coordination method and device of OFDMA system |
| CN101064905A (en) * | 2006-04-28 | 2007-10-31 | 华为技术有限公司 | Wireless system frequency resources distribution method, equipment and wireless communication system |
| CN101772038A (en) * | 2009-01-06 | 2010-07-07 | 上海贝尔阿尔卡特股份有限公司 | Method for clustering districts, communication network and resource scheduling system |
| CN101772034A (en) * | 2009-01-04 | 2010-07-07 | 华为技术有限公司 | Method, related equipment and system for determining interference priorities of neighbor cells |
-
2010
- 2010-08-03 CN CN 201010243116 patent/CN101917727B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050058151A1 (en) * | 2003-06-30 | 2005-03-17 | Chihsiang Yeh | Method of interference management for interference/collision avoidance and spatial reuse enhancement |
| CN101009541A (en) * | 2006-01-23 | 2007-08-01 | 华为技术有限公司 | Disturbance coordination method and device of OFDMA system |
| CN101064905A (en) * | 2006-04-28 | 2007-10-31 | 华为技术有限公司 | Wireless system frequency resources distribution method, equipment and wireless communication system |
| CN101772034A (en) * | 2009-01-04 | 2010-07-07 | 华为技术有限公司 | Method, related equipment and system for determining interference priorities of neighbor cells |
| CN101772038A (en) * | 2009-01-06 | 2010-07-07 | 上海贝尔阿尔卡特股份有限公司 | Method for clustering districts, communication network and resource scheduling system |
Cited By (11)
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|---|---|---|---|---|
| CN102790969A (en) * | 2011-05-16 | 2012-11-21 | 普天信息技术研究院有限公司 | Method for allocating border frequency bands in upstream interference |
| CN102790969B (en) * | 2011-05-16 | 2015-02-04 | 普天信息技术研究院有限公司 | Method for allocating border frequency bands in upstream interference |
| CN102857928A (en) * | 2011-06-29 | 2013-01-02 | 普天信息技术研究院有限公司 | Uplink interference coordination method |
| CN102857929A (en) * | 2011-06-29 | 2013-01-02 | 普天信息技术研究院有限公司 | Interference coordinating method of sectorized common-frequency networking communication system |
| CN102857929B (en) * | 2011-06-29 | 2015-10-14 | 中国普天信息产业股份有限公司 | A kind of disturbance coordination method of sectorization identical networking communication system |
| CN104902484A (en) * | 2014-03-04 | 2015-09-09 | 中国电信股份有限公司 | LTE inter-cell interference coordination method and device |
| CN104902484B (en) * | 2014-03-04 | 2018-06-19 | 中国电信股份有限公司 | LTE inter-cell interference coordination methods and device |
| CN107431928A (en) * | 2015-03-31 | 2017-12-01 | 三菱电机株式会社 | Frequency assigning apparatus, managing device, wireless main website, wireless terminal, communication system and frequency allocation method |
| CN105959959A (en) * | 2016-06-16 | 2016-09-21 | 北京汇通金财信息科技有限公司 | Base station and interference coordination method in base station horizontal networking system |
| CN109068388A (en) * | 2018-07-10 | 2018-12-21 | 中通服咨询设计研究院有限公司 | A kind of dynamic frequency multiplexing method for 5G network based on four colour theorem |
| CN109068388B (en) * | 2018-07-10 | 2022-12-16 | 中通服咨询设计研究院有限公司 | Dynamic frequency reuse method for 5G network based on four-color theorem |
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