CN101068435B - Method for conquering back interference and base station controller - Google Patents
Method for conquering back interference and base station controller Download PDFInfo
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- CN101068435B CN101068435B CN2007100736918A CN200710073691A CN101068435B CN 101068435 B CN101068435 B CN 101068435B CN 2007100736918 A CN2007100736918 A CN 2007100736918A CN 200710073691 A CN200710073691 A CN 200710073691A CN 101068435 B CN101068435 B CN 101068435B
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Abstract
A method for overcoming reverse interference includes judging whether interference is existed on service carrier frequency of mobile table (MT) or not and judging whether interference is existed on the other carrier frequency switched-in sector or not if it is, assigning a carrier frequency with no interference as new service carrier frequency of MT if carrier frequency with no interference is existed in the other carrier frequency and selecting carrier frequency with lowest interference as new service carrier frequency of MT if interference is existed on all the other carrier frequency. The base station controller used for realizing said method is also disclosed.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of method and base station controller that overcomes reverse interference.
Background technology
CDMA (Code Division Multiple Access, code division multiple access) is a kind of access mode based on the wide-band spread spectrum technology, belong to a self-interference system, the same frequency of the common use of all travelling carriages, the signal energy of each travelling carriage is dispensed in the whole frequency band scope, when the signal power of certain travelling carriage is strong, is favourable to the correct reception of this mobile station signal, but can increases sharing the interference of other travelling carriage in the frequency band.For some travelling carriages, oppositely be subjected to the influence that thermal noise, this sub-district and other community user disturb, these noises and interference finally show as the lifting of making an uproar at the end.
For connecting system, the CDMA travelling carriage must have enough power to go to overcome to be in the interference that other travelling carriage produces in the identical frequency band, that is to say, the signal of receiving in the base station must reach certain signal to noise ratio requirement, when background noise is excessive, must constantly attempt promoting the transmitting power of travelling carriage, the increase of transmitting power can cause the further lifting that the end makes an uproar conversely again, the transmitting power of travelling carriage is limited simultaneously, can not resist signal to noise ratio that the lifting of making an uproar the end of owing to causes when reducing when the transmitting power of travelling carriage reaches maximum, travelling carriage just can't access network.
In the prior art, based on forward direction load (transmitting power of base station) or forward direction WALSH sign indicating number operating position, in the sector, select the lighter frequency of load to carry out the foundation of Traffic Channel to the travelling carriage that inserts this sector, avoid causing calling out access failure owing to inserting overload.But this technical scheme is not considered the situation of access carrier reverse load and reverse interference, and the calling that reverse reason is caused inserts not solution of difficult problem.
Summary of the invention
The subject matter that the embodiment of the invention will solve provides a kind of method and base station controller that overcomes reverse interference, to solve the calling access difficult problem that reason causes.
For solving the problems of the technologies described above, the embodiment of the invention provides a kind of method that overcomes reverse interference, comprises step:
Measure the received signal strength indicator value of sector carrier frequency, judge according to this received signal strength indicator value whether travelling carriage service carrier frequency exists interference; There is interference in this service carrier frequency, judges whether other carrier frequency of sector exists interference; If existing in other carrier frequency of sector not have the carrier frequency that disturbs then specify a described carrier frequency that does not have interference as the new service carrier frequency of this travelling carriage, if all existing interference, other carrier frequency of sector select to disturb minimum carrier frequency as the new service carrier frequency of this travelling carriage.
Embodiments of the invention also provide a kind of base station controller that overcomes reverse interference, comprising:
Receive subelement, be used to receive measured value the received signal strength indicator value of carrier frequency under the sector;
Judgment sub-unit is used for judging according to the measured value of received signal strength indicator value whether described carrier frequency exists interference;
The notice subelement according to the judgment sub-unit result, exists under the situation about disturbing at the carrier frequency that travelling carriage adopts, and being used to notify described travelling carriage to adopt does not have to disturb or disturb lower carrier frequency.
Compared with prior art, the technical scheme that is provided of the embodiment of the invention, by measuring the received signal strength indicator value of sector carrier frequency, judge according to this received signal strength indicator value whether travelling carriage service carrier frequency exists interference, exist under the situation about disturbing at this service carrier frequency, whether other carrier frequency of judging the sector exists interference, if have the carrier frequency not have interference in other carrier frequency of sector then specify this carrier frequency as the new service carrier frequency of this travelling carriage, if all existing interference, other carrier frequency of sector select to disturb minimum carrier frequency as the new service carrier frequency of this travelling carriage, adopt this technical scheme, can overcome reverse interference, for the calling that inserts, the success rate of travelling carriage call setup can be provided,, also can improve communication quality being in the travelling carriage in the communication process.
Description of drawings
Fig. 1 is a kind of method flow diagram that overcomes reverse interference in the embodiment of the invention;
Fig. 2 overcomes the reverse interference method flow diagram for the embodiment of the invention one;
Fig. 3 overcomes the reverse interference method flow diagram for the embodiment of the invention two;
Fig. 4 is the base station controller structural representation of the embodiment of the invention three;
Fig. 5 is the base station controller structural representation of the embodiment of the invention four.
Embodiment
The present invention is described in detail below in conjunction with drawings and the specific embodiments.
Fig. 1 is a kind of method flow diagram that overcomes reverse interference in the embodiment of the invention, and as shown in Figure 1, this method comprises:
Step 100: the received signal strength indicator value (ReceivedSignal Strength Indicator is called for short RSSI) of measuring sector, travelling carriage place carrier frequency;
Wherein, there are at least 2 carrier frequency in sector, travelling carriage place, and in general, the hot zones user is numerous, needs a plurality of carrier frequency of configuration; Measuring received signal strength indicator value carries out at all carrier frequency under this sector.RSSI is the power sum that total interference signal that the base station measures at reverse pilot adds background noise, uses it to come reverse load is weighed among the present invention
Step 101: the RSSI value of the service carrier frequency of statistics travelling carriage is at T
0Be in specified scope [A in time
1, A
3] between number of times K
1, the RSSI value of the service carrier frequency of statistics travelling carriage is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2
Wherein, [A
1, A
3] be the normal interval value of RSSI value, [A
2, A
3] think to exist interference, A
1＜A
2＜A
3, A
1, A
2, A
3And T
0Determine by wireless environment, can after testing, determine according to concrete wireless environment; The service carrier frequency is the carrier frequency that service is provided to travelling carriage under the sector, the calling access carrier when comprising the travelling carriage connecting system and two kinds of situations of the use carrier frequency in the mobile communications process.
Step 102: judge K
2/ K
1Whether greater than the appointed threshold value, think to exist greater than the appointed threshold value and disturb, continue execution in step 103; Otherwise execution in step 104.
Wherein, K
2/ K
1Shown in time T
0The quality of interior carrier frequency signal quality.Not adopting certain numerical value once to assess the quality of CF signal quality, is the influence of avoiding the uncertainty of wireless environment to bring.
Step 103: the RSSI value of other carrier frequency of statistics sector, travelling carriage place is at T
0Be in specified scope [A in time
1, A
3] between number of times K
1, the RSSI value of other carrier frequency of statistics sector, travelling carriage place is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2, add up the execution in step 105 that finishes;
Wherein, statistics is to carry out respectively at carrier frequency all except that the carrier frequency of service is provided to travelling carriage.
Step 104: continue to use former service carrier frequency, process ends.
Step 105: judge K at other carrier frequency of sector, travelling carriage place
2/ K
1Whether less than the appointed threshold value, if execution in step 106 then, otherwise execution in step 107;
Step 106: have carrier frequency, can adopt this carrier frequency, under the situation that has a plurality of carrier frequency all not have to disturb, select one of them arbitrarily as the new service carrier frequency of travelling carriage less than the appointed threshold value;
Step 107: all there is interference in other all carrier frequency, then select K
2/ K
1Minimum carrier frequency is as the service carrier frequency.
In the present embodiment, at the calling that has just inserted, new service carrier frequency information is notified travelling carriage by channel assignment message; At the travelling carriage in communication process just, new service carrier frequency information sends (just the travelling carriage in communication process changes the service carrier frequency, belongs to direct-cut operation) by triggering the direct-cut operation Indication message.
Below be example with CDMA, the present invention is described in detail by two embodiment.
Embodiment one:
Present embodiment is at the calling that has just inserted, and whether by whether access carrier being existed the judgement of interference, checking to exist in other carrier frequency under the sector does not have interference or interference carrier frequency as the new access carrier of travelling carriage.
Overcome the method flow diagram of reverse interference in Fig. 2 embodiment of the invention one, as shown in Figure 2, this method may further comprise the steps:
Step 200:BTS (Base transceiver station, base transceiver station) (the Received Signal StrengthIndicator of received signal strength indicator value of measurement sector, travelling carriage place carrier frequency, be called for short RSSI), and measuring to such an extent that RSSI reports BSC (Base StationController, base station controller);
Wherein, there are at least 2 carrier frequency in sector, travelling carriage place, and in general, the hot zones user is numerous, needs a plurality of carrier frequency of configuration; Measuring received signal strength indicator value carries out at all carrier frequency under this sector.
The RSSI value of the access carrier of step 201:BSC statistics travelling carriage is at T
0Be in specified scope [A in time
1, A
3] between number of times K
1, the RSSI value of the access carrier of statistics travelling carriage is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2
Wherein, [A
1, A
3] be the normal interval value of RSSI value, [A
2, A
3] think to exist interference, A
1＜A
2＜A
3, A
1, A
2, A
3And T
0Determine by wireless environment, can after testing, determine according to concrete wireless environment; Access carrier is the carrier frequency that access service is provided to travelling carriage under the sector.
Step 202: judge K
2/ K
1Whether greater than the appointed threshold value, think to exist greater than the appointed threshold value and disturb, continue execution in step 203; Otherwise execution in step 204.
Wherein, K
2/ K
1Shown in time T
0The quality of interior carrier frequency signal quality.Not adopting certain numerical value once to assess the quality of CF signal quality, is the influence of avoiding the uncertainty of wireless environment to bring.
Step 203: the RSSI value of other carrier frequency of statistics sector, travelling carriage place is at T
0Be in specified scope [A in time
1, A
3] between number of times K
1, the RSSI value of other carrier frequency of statistics sector, travelling carriage place is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2, add up the execution in step 205 that finishes;
Wherein, statistics be under the sector except that the access carrier of service is provided all carrier frequency to travelling carriage carry out respectively.
Step 204: otherwise continue to use former access carrier, process ends.
Step 205: judge K at other carrier frequency of sector, travelling carriage place
2/ K
1Whether less than the appointed threshold value; If execution in step 106 then, otherwise execution in step 107;
Step 206: have carrier frequency, can adopt this carrier frequency, under the situation that has a plurality of carrier frequency all not have to disturb, select one of them arbitrarily as the new access carrier of travelling carriage less than the appointed threshold value;
Step 207: all there is interference in other all carrier frequency, then select K
2/ K
1Minimum carrier frequency is as access carrier.
Wherein, new access carrier information is notified travelling carriage by channel assignment message.
Embodiment two:
Present embodiment does not have interference or interference carrier frequency as the new communication use carrier frequency of travelling carriage at the calling of ongoing communication by using carrier frequency whether to have the judgement of interference to mobile communications, check whether to exist in other carrier frequency under the sector.
Overcome the method flow diagram of reverse interference in Fig. 3 embodiment of the invention two, as shown in Figure 3, this method may further comprise the steps:
Step 300:BTS (Base transceiver station, base transceiver station) (the Received Signal StrengthIndicator of received signal strength indicator value of measurement sector, travelling carriage place carrier frequency, be called for short RSSI), and measuring to such an extent that RSSI reports BSC (Base StationController, base station controller);
Wherein, there are at least 2 carrier frequency in sector, travelling carriage place, and in general, the hot zones user is numerous, needs a plurality of carrier frequency of configuration; Measuring received signal strength indicator value carries out at all carrier frequency under this sector.
The communication of step 301:BSC statistics travelling carriage uses the RSSI value of carrier frequency at T
0Be in specified scope [A in time
1, A
3] between number of times K
1, the RSSI value of the communication use carrier frequency of statistics travelling carriage is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2
Wherein, [A
1, A
3] be the normal interval value of RSSI value, [A
2, A
3] think to exist interference, A
1＜A
2＜A
3, A
1, A
2, A
3And T
0Determine by wireless environment, can after testing, determine according to concrete wireless environment; Access carrier is the carrier frequency that access service is provided to travelling carriage under the sector.
Step 302: judge K
2/ K
1Whether greater than the appointed threshold value, think to exist greater than the appointed threshold value and disturb, continue execution in step 303; Otherwise execution in step 304.
Wherein, K
2/ K
1Shown in time T
0The quality of interior carrier frequency signal quality.Not adopting certain numerical value once to assess the quality of CF signal quality, is the influence of avoiding the uncertainty of wireless environment to bring.
Step 303: the RSSI value of other carrier frequency of statistics sector, travelling carriage place is at T
0Be in specified scope [A in time
1, A
3] between number of times K
1, the RSSI value of other carrier frequency of statistics sector, travelling carriage place is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2, add up the execution in step 305 that finishes
Wherein, statistics be under the sector except that using carrier frequency to mobile communications all carrier frequency carry out respectively.
Step 304: otherwise continue to use former communication to use carrier frequency, process ends.
Step 305: judge K at other carrier frequency of sector, travelling carriage place
2/ K
1Whether less than the appointed threshold value, be execution in step 306 then, otherwise execution in step 307;
Step 306: have carrier frequency, can adopt this carrier frequency, under the situation that is having a plurality of carrier frequency all not have to disturb, select one of them arbitrarily as the new communication use carrier frequency of travelling carriage less than the appointed threshold value; Process ends.
Step 307:, then select K if all there is interference in other all carrier frequency
2/ K
1Minimum carrier frequency uses the carrier frequency process ends as communication.
In the present embodiment, new communication uses carrier frequency information to send to travelling carriage with switch indicating information after triggering direct-cut operation.
Fig. 4 is a kind of base station controller structural representation of the embodiment of the invention three, and as shown in Figure 4, base station controller comprises:
Receive subelement 410, be used to receive measured value the received signal strength indicator value of carrier frequency under the sector;
Wherein, judgment sub-unit 420 comprises:
Disturb judge module 422, be used for data, judge whether described carrier frequency exists interference according to statistical module 421.
Wherein, notice subelement 430 comprises:
Assignment message generation module 431 according to judgment sub-unit 420 results, exists under the situation about disturbing at the carrier frequency that travelling carriage adopts, and is used to generate comprise and indicates the channel assignment message that travelling carriage adopts does not have to disturb or disturb lower carrier frequency information;
Sending module 432 is used for described channel assignment message is sent to described travelling carriage.
Fig. 5 is a kind of base station controller structural representation of the embodiment of the invention four, and as shown in Figure 5, base station controller comprises:
Receive subelement 410, be used to receive measured value the received signal strength indicator value of carrier frequency under the sector;
Wherein, judgment sub-unit 420 comprises:
Disturb judge module 422, be used for data, judge whether described carrier frequency exists interference according to statistical module 421.
The notice subelement comprises:
Switch indicating information generation module 438 according to judgment sub-unit 420 results, exists under the situation about disturbing at the carrier frequency that travelling carriage adopts, and is used to generate comprise and indicates the switch indicating information that travelling carriage adopts does not have to disturb or disturb lower carrier frequency information;
Sending module 439 is used for described switch indicating information is sent to described travelling carriage.
In sum, the technical scheme that is provided of the embodiment of the invention, by measuring the received signal strength indicator value of sector carrier frequency, judge according to this received signal strength indicator value whether travelling carriage service carrier frequency exists interference, exist under the situation about disturbing at this service carrier frequency, whether other carrier frequency of judging the sector exists interference, if have the carrier frequency not have interference in other carrier frequency of sector then specify this carrier frequency as the new service carrier frequency of this travelling carriage, if all existing interference, other carrier frequency of sector select to disturb minimum carrier frequency as the new service carrier frequency of this travelling carriage, adopt this technical scheme, can overcome reverse interference, for the calling that inserts, the success rate of travelling carriage call setup can be provided,, also can improve communication quality being in the travelling carriage in the communication process.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. a method that overcomes reverse interference is characterized in that, may further comprise the steps:
Measure the received signal strength indicator value of sector carrier frequency, the received signal strength indicator value of statistics travelling carriage service carrier frequency is T at the appointed time
0In be in specified scope [A
1, A
3] between number of times K
1, the received signal strength indicator value that adds up described travelling carriage service carrier frequency is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2, judge K
2/ K
1Whether greater than the appointed threshold value, think to exist greater than the appointed threshold value and disturb;
Disturb if described service carrier frequency exists, the received signal strength indicator value of a certain carrier frequency in other carrier frequency of statistics sector is T at the appointed time
0In be in specified scope [A
1, A
3] between number of times K
1, the received signal strength indicator value that adds up described a certain carrier frequency is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2, judge K
2/ K
1Whether greater than the appointed threshold value, think greater than the appointed threshold value that described a certain carrier frequency exists and disturb;
If existing in described other carrier frequency not have the carrier frequency that disturbs then specify a described carrier frequency that does not have interference as the new service carrier frequency of described travelling carriage, if all existing interference, described other carrier frequency select to disturb minimum carrier frequency as the new service carrier frequency of described travelling carriage;
Described [A
1, A
3] be the normal interval value of received signal strength indicator value, described [A
2, A
3] disturb interval value for existing, wherein, A
1＜A
2＜A
3
2. a kind of method that overcomes reverse interference as claimed in claim 1 is characterized in that, described fixed time, specified scope and appointed threshold value are determined according to wireless environment.
3. a kind of method that overcomes reverse interference as claimed in claim 1 is characterized in that, further comprises: rigidly connect into calling, notify described travelling carriage on new service carrier frequency, to set up Traffic Channel by channel assignment message.
4. a kind of method that overcomes reverse interference as claimed in claim 1 is characterized in that, further comprises: just notifying by switch indicating information, the travelling carriage in communication process adopts new service carrier frequency.
5. a base station controller is characterized in that, comprising:
Receive subelement, be used to receive measured value the received signal strength indicator value of carrier frequency under the sector;
Judgment sub-unit is used for judging according to the measured value of described received signal strength indicator value whether described carrier frequency exists interference;
The notice subelement according to the judgment sub-unit result, exists under the situation about disturbing at the carrier frequency that travelling carriage adopts, and being used to notify described travelling carriage to adopt does not have to disturb or disturb lower carrier frequency;
The communication of BSC statistics travelling carriage uses the RSSI value of carrier frequency at T
0Be in specified scope [A in time
1, A
3] between number of times K
1, the RSSI value of the communication use carrier frequency of statistics travelling carriage is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2
Judge K
2/ K
1Whether greater than the appointed threshold value, think to exist greater than the appointed threshold value and disturb;
Disturb if described service carrier frequency exists, the received signal strength indicator value of a certain carrier frequency in other carrier frequency of statistics sector is T at the appointed time
0In be in specified scope [A
1, A
3] between number of times K
1, the received signal strength indicator value that adds up described a certain carrier frequency is T at the appointed time
0In be in specified scope [A
2, A
3] between number of times K
2, judge K
2/ K
1Whether greater than the appointed threshold value, think greater than the appointed threshold value that described a certain carrier frequency exists and disturb;
Wherein, [A
1, A
3] be the normal interval value of RSSI value, [A
2, A
3] think to exist interference, A
1＜A
2＜A
3
6. base station controller as claimed in claim 5 is characterized in that, described judgment sub-unit comprises:
Statistical module, the measured value that is used to add up received signal strength indicator value at the appointed time in number of times in the specified scope;
Disturb judge module, be used for data, judge whether described carrier frequency exists interference according to statistical module counts.
7. base station controller as claimed in claim 5 is characterized in that, described notice subelement comprises:
The assignment message generation module according to the judgment sub-unit result, exists under the situation about disturbing at the carrier frequency that travelling carriage adopts, and is used to generate comprise and indicates the channel assignment message that travelling carriage adopts does not have to disturb or disturb lower carrier frequency information;
Sending module is used for described channel assignment message is sent to described travelling carriage.
8. base station controller as claimed in claim 5 is characterized in that, described notice subelement comprises:
The switch indicating information generation module according to the judgment sub-unit result, exists under the situation about disturbing at the carrier frequency that travelling carriage adopts, and is used to generate comprise and indicates the switch indicating information that travelling carriage adopts does not have to disturb or disturb lower carrier frequency information;
Sending module is used for described switch indicating information is sent to described travelling carriage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100736918A CN101068435B (en) | 2007-03-23 | 2007-03-23 | Method for conquering back interference and base station controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100736918A CN101068435B (en) | 2007-03-23 | 2007-03-23 | Method for conquering back interference and base station controller |
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| CN101068435B true CN101068435B (en) | 2010-11-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394671B (en) * | 2008-10-14 | 2013-02-27 | 上海华为技术有限公司 | Method, device and system for selecting access carrier for access terminal |
| CN101820683A (en) * | 2009-02-26 | 2010-09-01 | 中兴通讯股份有限公司 | Method for transmitting interference control information |
| CN103178924B (en) * | 2011-12-20 | 2018-04-17 | 国民技术股份有限公司 | A kind of data transmission method and terminal |
| CN102781013B (en) * | 2012-07-12 | 2014-12-17 | 北京拓明科技有限公司 | Interfering cell model real-time adjusting method based on traffic statistics |
| CN102781012B (en) * | 2012-07-12 | 2015-01-07 | 北京拓明科技有限公司 | Automatic optimizing method for uplink interference |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1240560A (en) * | 1996-12-19 | 2000-01-05 | 艾利森电话股份有限公司 | Estimating downlink interference in a cellular communications system |
| CN1735258A (en) * | 2004-08-10 | 2006-02-15 | 中兴通讯股份有限公司 | Multi-carrier frequency cell major and minor carrier frequency adjusting method in TD-SCDMA system |
-
2007
- 2007-03-23 CN CN2007100736918A patent/CN101068435B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1240560A (en) * | 1996-12-19 | 2000-01-05 | 艾利森电话股份有限公司 | Estimating downlink interference in a cellular communications system |
| CN1735258A (en) * | 2004-08-10 | 2006-02-15 | 中兴通讯股份有限公司 | Multi-carrier frequency cell major and minor carrier frequency adjusting method in TD-SCDMA system |
Non-Patent Citations (1)
| Title |
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| CN 1240560 A,全文. |
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