CN101730309B - Method for suppressing interference of wireless communication system - Google Patents
Method for suppressing interference of wireless communication system Download PDFInfo
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- CN101730309B CN101730309B CN2008101746610A CN200810174661A CN101730309B CN 101730309 B CN101730309 B CN 101730309B CN 2008101746610 A CN2008101746610 A CN 2008101746610A CN 200810174661 A CN200810174661 A CN 200810174661A CN 101730309 B CN101730309 B CN 101730309B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method for suppressing the interference of a wireless communication system, and relates to an LTE system. The method comprises the following steps that: a base station or a base station controller judges whether the number of resident users in an affiliated cell thereof is 0 or not, and if so, closing a function unit accordingly managing the cell in the base station when the cell meets at least one of the following conditions that: (1) the cell is a non-high speed cell; (2) the cell is a non-track area (TA) boundary cell; (3) the load capacity of a same-coverage cell of the cell is not more than a set threshold; and (4) an adjacent cell of the cell which is allowed to switch has no potential mobility, wherein the potential mobility means the possibility that all users in the adjacent cell switch to the cell. The method decreases the interference of a downlink channel between adjacent cells, closes part of eNode B, and lowers the energy consumption of base station devices.
Description
Technical field
The present invention relates to LTE (Long Term Evolution, Long Term Evolution project) system, particularly a kind of method for suppressing interference of wireless communication system.
Background technology
In 3GPP LTE project, introduced the notion of SON (Self-Organising Networks, self-organizing network).Through the self-configuring (Self Configuration) and the self-optimizing (SelfOptimization) of network, reduce the complexity of network operation, improve the operability and the operational effect of network.
Specifically come institute, the function of SON comprises:
Self-Establishment (self-built): eNodeB (Evolved Node B, evolution Node B) promptly inserts promptly to go into, and automatic software installation disposes wireless parameter and transmission parameter automatically, detect automatically, and the automatic management of syntople etc.This special topic is that everybody is concerned about most, and demand, use-case and feature list be basic forming, has got into the concrete solution stage on the standard.
Self-Optimization (self-optimizing): network quality is that operator is concerned about most always; The network optimization also is work very consuming time and that need a large amount of manpowers to get involved; The SON network attention is in neighbor cell optimization, according to covering and network is optimized, parameter optimization, dynamic resource switching and optimization when performance quality goes wrong, switching-related parameters optimization, the MBMS network optimization, and hope can realize the Automatic Optimal work of above-mentioned these aspects.
ANR List Management (Neighboring Cell List that allows automatically to switch is managed): cooperate ANR (Automatic Neighbour Relations allows the neighboring BS relationship that the switches automatically) function on the eNodeB, the management function that provides ANR to be correlated with.
Self-Healing (selfreparing): be mainly used in the regular maintenance of network, when network breaks down, repair automatically to greatest extent or reduce the influence of fault to network performance.Because Self-healing is less relatively to the initial stage construction influence of network; So hope to go up under the situation of LTE as early as possible in present operator; Operator hopes to realize earlier the standardization of Self-Establishment and Self-optimization; And Self-Healing studies earlier, finally accomplishes last standardization in the R9 stage.
But at present, SON also can't solve the descending interference problem between the neighbor cell that allows to switch well, therefore is badly in need of proposing a kind of method that suppresses the descending interference of neighbor cell.
Summary of the invention:
Technical problem to be solved by this invention is, proposes a kind of method for suppressing interference of wireless communication system, under the situation that guarantees the normal operation of network, reduces descending interference as much as possible.
In order to address the above problem, the invention discloses a kind of method for suppressing interference of wireless communication system, comprising:
Base station or base station controller judge whether the resident number of users of its affiliated subdistrict is 0, if, and this sub-district is when satisfying following 1 condition at least, that part of functional unit of closing the said sub-district of corresponding management in the said base station;
(1) said sub-district is non-high speed sub-district;
(2) said sub-district is non-tracing area TA border cell;
(3) the same coverage cell load of said sub-district is not more than the thresholding of setting;
(4) adjacent area of the permission of said sub-district switching does not possess potential mobility, and wherein, potential mobility refers to that the adjacent area user has the possibility that switches to said sub-district.
Further, in the said method, perhaps set that part of functional unit that other network elements are closed the said sub-district of corresponding management in the said base station by the operation maintenance center.
Further, in the said method, when in meeting the following conditions arbitrary or two conditions all satisfy, think that said adjacent area does not possess potential mobility:
The sub-district of said adjacent area administration is non-high speed sub-district, thinks that then said adjacent area does not possess potential mobility;
Among the said adjacent area user, the number that is positioned at the user on border, adjacent area does not reach the setting thresholding, thinks that then said adjacent area does not possess potential mobility.
Wherein, the said user who is positioned at the border, adjacent area refers to, reaches the user who sets thresholding with the distance of said neighbor base station.
Said non-high speed sub-district refers to, does not have the terminal of high-speed mobile in the sub-district, and perhaps the frequency of user's switching cell does not reach the setting thresholding in the sub-district.
Through the random access guiding form, the length of the lead code that perhaps circulates judges whether the terminal in the said sub-district is high-speed mobile.
Further, in the said method,, only when all load with coverage cell all are not more than the thresholding of setting, close that part of functional unit of the said sub-district of corresponding management in the said base station when said sub-district has a plurality ofly during with coverage cell; Perhaps
Said sub-district is for comprising the sub-district, and is said when being involved sub-district with coverage cell, only when said when being not more than the thresholding of setting with the coverage cell load, and that part of functional unit of closing the said sub-district of corresponding management in the said base station; Perhaps
When said sub-district was indoor coverage cell, picocell or base station cell, said cell load amount was not more than the thresholding of setting, then closed that part of functional unit of the said sub-district of corresponding management in the said base station.
The inventive method under the situation that guarantees the normal operation of network, has adopted the means of the cell base station of closing no resident user, has reduced the interference of down channel between the adjacent area as much as possible, and closed portion eNodeB, has also reduced the energy resource consumption of base station equipment.
Description of drawings:
Fig. 1 is that descending interference suppresses process chart in the present embodiment;
Fig. 2 is current area related in the flow process shown in Figure 1 and the sketch map that concerns with coverage cell;
Fig. 3 judges in the present embodiment whether the adjacent area that allows to switch possesses potential ambulant flow chart.
Embodiment:
Main design of the present invention is, can adopt the technological means of the eNodeB that closes no resident user to reach the descending interference problem that reduces between the adjacent area, considers simultaneously; Simply close eNodeB and can cause network cavity, therefore, need further consider the factors such as relation of load capacity and this sub-district and the adjacent area that allows switching of attribute (like the speed attribute of sub-district etc.), the sub-district of the sub-district of the eNodeB administration that institute will close; Wherein, the speed attribute of sub-district is relevant with the concrete configuration of sub-district, and concrete configuration comprises CP (the cyclic prefix that wireless channel adopts; It is leading to circulate) pattern, up-downgoing resource mapping method, cell transmit power etc.; For example, can adjudicate the speed attribute of sub-district according to the CP of wireless channel, generally speaking; General CP is adopted in non-high speed sub-district, and expansion CP is adopted in the high speed sub-district.
Below in conjunction with accompanying drawing and embodiment, technical scheme of the present invention is further described in detail:
A kind of method for suppressing interference of wireless communication system, as shown in Figure 1, may further comprise the steps:
Step 101:eNodeB measures the resident number of users of the sub-district (hereinafter is claimed current area) of its administration, and judges whether resident number of users is 0, if, get into step 102, otherwise, process ends;
In this step, a timer can be set, in timing cycle, measure the resident number of users of current area,, then get into step 102 if resident number of users is 0 in the timer term of validity;
Whether the current area of judging step 102:eNodeB satisfies following any condition at least, if, get into step 103, otherwise process ends;
(a) current area is non-high speed sub-district;
Non-high speed sub-district refers to; The user of no high-speed mobile in the sub-district, perhaps the frequency of user's switching cell does not reach the thresholding of setting in the sub-district, wherein; Can pass through the random access guiding form, the length of the lead code that perhaps circulates judges whether the terminal in the sub-district is high-speed mobile.
(b) current area is non-TA (Trace Area, a tracing area) border cell;
(c) the same coverage cell load of current area generally can be made as 0 with this thresholding smaller or equal to the thresholding of setting (preferred threshold is 0);
Be the telephone traffic with coverage cell with the coverage cell load, because the existence of load balancing algorithm, when the telephone traffic with coverage cell was not 0, current area was with the load of coverage cell and all carries on a shoulder pole the sub-district, therefore can not close sub-district eNodeB.Following map 2 introduce current area with several kinds of relations of coverage cell:
For example, current area shown in Fig. 2 (b) and n sub-district are during with coverage cell, if exist telephone traffic to reach the sub-district (general telephone traffic be not 0 get final product) of certain value in this n sub-district, then can not close the eNodeB of current area, (n >=1);
And for example, the same coverage cell shown in Fig. 2 (a) is to comprise and involved sub-district, and wherein, current area is for comprising the sub-district, if the telephone traffic of involved sub-district reaches certain value (general telephone traffic be not 0 get final product), then the eNodeB of current area can not close;
In addition, when current area is indoor coverage cell, picocell or Home eNodeB sub-district, base station,, also can close the eNodeB of current area even the telephone traffic that comprises the sub-district of current area has reached certain value (general telephone traffic be not 0 get final product);
(d) adjacent area of the permission of current area switching does not possess potential mobility, and wherein, potential mobility is meant whether the adjacent area user has the possibility of the current area of switching to.
Step 103: this eNodeB is closed at operation maintenance center (Operation Management Center is called for short OMC).
In this step, also can set through other network element (like base station controller etc.) and carry out shutoff operation, simultaneously, both can directly close eNodeB, also can only close that part of functional unit that respective tube among the eNodeB should preceding sub-district, to suppress descending interference.
In other embodiments; Above-mentioned flow process also can be carried out by base station controller; Promptly measure the resident user data of each sub-district by base station controller; When the resident number of users in sub-district is 0, then further judge this cell attribute, whether final decision closes that part of function of this sub-district of BTS management to reach the purpose that suppresses descending interference.
In addition, in other embodiments, can judge earlier also whether eNodeB satisfies the condition (one or several in the above-mentioned condition (a)-(d)) of closing; If whether the resident number of users of then measuring the sub-district of its administration is 0, if; Then close eNodeB suppressing descending interference, otherwise process ends.
Introduce in detail below; Determine whether to close the process of eNodeB according to the adjacent area mobility measurements that allow to switch (whether the adjacent area that promptly allows to switch possesses potential mobility), suppose that current area is eNB1, allowing the adjacent area of switching is eNB2; Mutual mutually (in other embodiments between eNB1 and the eNB2 through the X2 mouth; Also can pass through the S1 interactive interfacing) the potential mobility information M of 1 bit, when M=0, show that the adjacent area that the permission of current area is switched does not possess potential mobility; When M=1, show that the adjacent area that current permission is switched possesses potential mobility.ENB1 is as shown in Figure 3 according to the detailed process that the M value of eNB2 report determines whether to close eNB1, may further comprise the steps:
Step 301:eNB2 judges whether the sub-district of its administration is the high speed sub-district, if, get into step 307, get into step 302 otherwise be provided with;
Preferably, eNB2 can judge whether this sub-district is the high speed sub-district according to the UE that whether has high-speed mobile in the sub-district, promptly when having the UE of high-speed mobile in the sub-district; This sub-district is the high speed sub-district, otherwise the sub-district is non-high speed sub-district; Wherein, can judge whether the number of times that UE carries out switching the sub-district reaches the setting thresholding in a period of time, if; Think that then UE is a high-speed mobile; Can certainly judge whether the actual motion speed of UE reaches the threshold values of setting, if think that then UE is a high-speed mobile;
Preferably; ENB2 can carry out cell update or the frequency switched judges whether this sub-district is the high speed sub-district through UE in a period of time, the frequency of promptly carrying out cell update or switching as UE reaches the thresholding of setting, thinks that then this sub-district is the high speed sub-district; Otherwise this sub-district is non-high speed sub-district.
Step 302: thresholding P (P is a percentage) is set, and in the present embodiment, it is 80% that P is set, be used to show UE in the sub-district apart from the distance of eNB2 account for radius of society 80% apart from the time, its potential switching probability reaches a certain degree (be UE will carry out the sub-district switch);
Set thresholding P in this step also can be provided with in advance.
Step 303:eNB2 measures according to the UE path loss, with measured value according to the conversion of current area wireless channel model for UE apart from eNB2 apart from t;
Step 304: if radius of society is T, whether judge t, if get into step 305, otherwise get into step 308 more than or equal to T*P;
Step 305: current counter C is added 1;
In this step, counter be used for statistics be positioned at cell boarder (be distance between UE and the eNB2 account for radius of society percentage greater than the P that sets) the UE number.
Step 306: user's thresholding Q (Q is a percentage) is set, and in the present embodiment, Q is 1%, total number of users N in the eNB2 detected cells, and whether judge C more than or equal to N*Q, if get into step 307, otherwise get into step 308;
Set user's thresholding Q in this step also can be provided with in advance.
Step 307: it is 1 that M is set, and gets into step 309;
Step 308: it is 0 that M is set;
Step 309: allow the mode of the adjacent area eNB2 employing cycle report of switching, report eNB2 current potential mobility information through the X2 mouth to eNB1, i.e. the M value;
Step 310:eNB1 reads the M value, judges whether the M value is 1, if, measure the resident user data of the sub-district of its administration, when resident number of users is 0, close eNB1, if the M value is 0, process ends then.
Can find out from the foregoing description; Technical scheme of the present invention is to no resident user's sub-district; In conjunction with the load capacity of the attribute of this sub-district, sub-district and this sub-district factors such as relation with the adjacent area that allows to switch; Confirm to close this sub-district eNodeB, thereby under the situation that guarantees the normal operation of network, reduced the interference of down channel between the adjacent area as much as possible.In addition, the technological means of closing eNB that the present technique scheme is adopted can also reduce the energy resource consumption of eNB.
Certainly; The present invention can also have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (6)
1. a method for suppressing interference of wireless communication system is characterized in that, comprising:
Base station or base station controller judge whether the resident number of users of its affiliated subdistrict is 0, if, and this sub-district is when satisfying following 1 condition at least, that part of functional unit of closing the said sub-district of corresponding management in the said base station;
(1) said sub-district is non-high speed sub-district;
(2) said sub-district is non-tracing area TA border cell;
(3) the same coverage cell load of said sub-district is not more than the thresholding of setting;
(4) adjacent area of the permission of said sub-district switching does not possess potential mobility, and wherein, potential mobility refers to that the adjacent area user has the possibility that switches to said sub-district;
Said non-high speed sub-district refers to, does not have the terminal of high-speed mobile in the sub-district, and perhaps the frequency of user's switching cell does not reach the setting thresholding in the sub-district.
2. the method for claim 1 is characterized in that,
Perhaps set that part of functional unit that other network elements are closed the said sub-district of corresponding management in the said base station by the operation maintenance center.
3. the method for claim 1 is characterized in that,
When in meeting the following conditions arbitrary or two conditions all satisfy, think that said adjacent area does not possess potential mobility:
The sub-district of said adjacent area administration is non-high speed sub-district, thinks that then said adjacent area does not possess potential mobility;
Among the said adjacent area user, the number that is positioned at the user on border, adjacent area does not reach the setting thresholding, thinks that then said adjacent area does not possess potential mobility.
4. method as claimed in claim 3 is characterized in that,
The said user who is positioned at the border, adjacent area refers to, reaches the user who sets thresholding with the distance of said neighbor base station.
5. the method for claim 1 is characterized in that,
Through the random access guiding form, the length of the lead code that perhaps circulates judges whether the terminal in the said sub-district is high-speed mobile.
6. the method for claim 1 is characterized in that,
When said sub-district has a plurality ofly during with coverage cell, only when all load with coverage cell all are not more than the thresholding of setting, close that part of functional unit of the said sub-district of corresponding management in the said base station; Perhaps
Said sub-district is for comprising the sub-district, and is said when being involved sub-district with coverage cell, only when said when being not more than the thresholding of setting with the coverage cell load, and that part of functional unit of closing the said sub-district of corresponding management in the said base station; Perhaps
When said sub-district was indoor coverage cell, picocell or base station cell, said cell load amount was not more than the thresholding of setting, then closed that part of functional unit of the said sub-district of corresponding management in the said base station.
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| WO2013071506A1 (en) * | 2011-11-17 | 2013-05-23 | Renesas Mobile Corporation | Methods and apparatuses for provision of reference signal design for downlink tracking in occupied shared band |
| CN104796930A (en) * | 2014-01-17 | 2015-07-22 | 中兴通讯股份有限公司 | Cell processing method and device |
| CN113329479A (en) * | 2020-02-28 | 2021-08-31 | 中国电信股份有限公司 | Base station energy saving device, method, system, base station management device and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0772948A1 (en) * | 1995-05-25 | 1997-05-14 | Motorola, Inc. | A method for assigning subscribers between narrowbeam sectors |
| CN1449211A (en) * | 2002-03-29 | 2003-10-15 | 华为技术有限公司 | Power control method under base station selected diversity transmission |
| CN101080047A (en) * | 2007-06-22 | 2007-11-28 | 清华大学 | An energy-saving method applied in GSM base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0772948A1 (en) * | 1995-05-25 | 1997-05-14 | Motorola, Inc. | A method for assigning subscribers between narrowbeam sectors |
| CN1449211A (en) * | 2002-03-29 | 2003-10-15 | 华为技术有限公司 | Power control method under base station selected diversity transmission |
| CN101080047A (en) * | 2007-06-22 | 2007-11-28 | 清华大学 | An energy-saving method applied in GSM base station |
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