CN102457927B - Method for preventing ping-pong reselection - Google Patents
Method for preventing ping-pong reselection Download PDFInfo
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- CN102457927B CN102457927B CN201010526510.4A CN201010526510A CN102457927B CN 102457927 B CN102457927 B CN 102457927B CN 201010526510 A CN201010526510 A CN 201010526510A CN 102457927 B CN102457927 B CN 102457927B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004891 communication Methods 0.000 claims abstract description 71
- 230000005484 gravity Effects 0.000 claims description 47
- 206010066901 Treatment failure Diseases 0.000 claims description 7
- 230000026676 system process Effects 0.000 claims description 4
- 238000010295 mobile communication Methods 0.000 description 6
- 230000006978 adaptation Effects 0.000 description 5
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Abstract
The invention discloses a method for preventing ping-pong reselection. A ping-pong environment is identified by recording the time of a mobile terminal in a first communication network system and a second communication network system; in the ping-pong environment, ping-pong protection is started and a reselection threshold value is increased; the increased threshold value is gradually reduced as the time goes by; however, if reselection happens again during the reduction of the threshold value, the reselection threshold value can be increased automatically; when the mobile terminal stays on the first communication network system or the second communication network system for fixed time, the ping-pong protection disappears automatically; therefore, a threshold increased value is adaptively adjusted according to a specific situation of a network so as to prevent the ping-pong reselection.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of method that prevents ping-pong reselection based on different system.
Background technology
At present, in mobile communication system, if mobile terminal can be supported the mobile communications network (as dual-mode handset) of two kinds of different systems, can be according to factors such as the quality of network signal quality, self current resident network is carried out to gravity treatment.For example mobile terminal is at present in second generation communications network system (2G), and the network signal of second generation mobile communcations system in current region is when poorer than the network signal of third generation communications network system (3G), mobile terminal can be selected to access in 3 G mobile communication network.And after mobile terminal successfully enters 3 G mobile communication network, if when the signal of the Generation Mobile Telecommunication System network of region is better than again the signal of 3 G mobile communication network, mobile terminal can be selected again to access in Generation Mobile Telecommunication System network, and the object that visible mobile terminal carries out gravity treatment to network is to select a good network of signal quality as self current resident network.
In prior art, because mobile terminal has the gravity treatment behavior between above-mentioned different system, therefore, in the time that the signal of Generation Mobile Telecommunication System network in certain region and the signal of 3 G mobile communication network are all unstable, between two network systems, select continually with regard to the terminal that is likely moved, thereby cause " ping-pong reselection " effect.Because ping-pong reselection effect can increase network load, affect network quality, can be very high thereby can increase user's off-grid probability, the particularly called percent of call lost, greatly affect user's communication experiences.Meanwhile, the power consumption of mobile terminal also can increase greatly.
For this kind of phenomenon, the regulation of existing 3GPP agreement: 3G system is returned in inaccurate gravity treatment in the 5s that selects back 2G from 3G, the interior meeting of 15s gravity treatment threshold value need to increase 5dB.In above-mentioned agreement, the evaluation criteria of gravity treatment is exactly 5s, but in this 5s, the regulation of inaccurate gravity treatment does not almost act on, because the regulation that in 5s, 3G system is returned in inaccurate gravity treatment cannot stop the gravity treatment in a period of time after 5s, and system generally the identification of ping-pong reselection to be had more than be 5s, i.e. supposition system thinks between the inherent 2G of 30s and 3G system that gravity treatment is ping-pong reselection back and forth, and the 5s time that agreement specifies is so to stop 5s to the ping-pong reselection in the 30s time.And the threshold value of increase 5dB, also can only be in 15s effectively, and because the complexity of wireless environment, and the property relationship of mobile terminal itself, the threshold value that increases 5dB is usually inadequate, prior art cannot be according to the concrete condition of network, carrys out self adaptation and adjusts thresholding added value to prevent the generation of ping-pong reselection.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of method that prevents ping-pong reselection, cannot be according to the concrete condition of network in order to solve prior art, and carry out self adaptation and adjust the problem of thresholding added value to prevent that ping-pong reselection from occurring.
For addressing the above problem, the invention provides a kind of method that prevents ping-pong reselection, the method comprises the steps:
First and second timer is set, respectively in order to add up the time of mobile terminal in first and second communications network system;
In the time being converted to second communication network system from the first communications network system, start the first timer;
If generation systems gravity treatment, starts the second timer and closes the first timer in the time that the first timer activates;
If generation systems gravity treatment again in the time that the second timer activates, is made as the first value by punishment side-play amount, and starts the first timer;
If there is again system gravity treatment in predetermined time, will punish that side-play amount increases by the first preset value, and restart the first timer; If in the not generation systems gravity treatment of above-mentioned predetermined time, will punish that side-play amount reduces by the second preset value, and restart the first timer;
Continue to judge whether, in predetermined time, system gravity treatment has occurred again, and increase or minimizing punishment side-play amount by previous step is corresponding, be extremely zero to punishment offset minus, thereby do not restart the first timer, the absolute thresholding of the first communications network system recovers normal.
According to above-mentioned principal character, described the first communications network system is third generation communications network system, and second communication network system is second generation communications network system.
According to above-mentioned principal character, wherein punish that the first value of side-play amount, the first preset value that punishment side-play amount increases, the second preset value that punishment side-play amount reduces are fixed value
According to above-mentioned principal character, first value of wherein punishing side-play amount is 9dB, and the first preset value that punishment side-play amount increases is penalty value step-length, is 9dB, and the second preset value that punishment side-play amount reduces is 3dB.
According to above-mentioned principal character, the process that wherein second generation communications network system is transformed into third generation communications network system comprises that second generation communications network system is transformed into the reuse adoption process of third generation communications network system and the third generation communications network system process that the gravity treatment failure of second generation communications network system is unsuccessfully returned afterwards.
According to above-mentioned principal character, wherein third generation communications network system is transformed into second generation communications network system process and comprises that third generation communications network system is transformed into the gravity treatment of second generation communications network system and second generation communications network system is transformed into the process of unsuccessfully returning after third generation communications network system gravity treatment failure.
Compared with prior art, the present invention by record move terminal the time in first and second communications network system identify table tennis environment, and under table tennis environment, start table tennis protection, raise gravity treatment threshold value, and the threshold value of raising can reduce as time goes by and progressively; If but there is again gravity treatment in centre; can automatically increase so gravity treatment threshold value; when mobile terminal continuously first or second communication network system on stopped after the set time; table tennis protection can disappear automatically; so, according to the concrete condition of network, carry out self adaptation and adjust the problem of thresholding added value to prevent that ping-pong reselection from occurring.
Brief description of the drawings
Fig. 1 is the flow chart that enforcement the present invention prevents the method for ping-pong reselection.
Fig. 2 is the system conversion schematic diagram of implementing a specific embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the invention is described.
Refer to shown in Fig. 1 and Fig. 2, Fig. 1 is the flow chart that enforcement the present invention prevents the method for ping-pong reselection, and Fig. 2 is the imbody of flow chart shown in Fig. 1, and wherein the method is divided into three phases:
First stage, for table tennis environment the stage of recognition, comprises the steps:
Step S100, by arranging first and second timer T, S, respectively in order to add up the time of mobile terminal in first and second communications network system;
Step S101, continues to judge whether to occur to be converted to second communication network system (2G) from the first communications network system (3G);
Step S102, in this way, starts the first timer T;
Step S103, continues to judge whether system gravity treatment has occurred in the time that the first timer T activates;
Step S104, in this way, starts the second timer S and closes the first timer T;
Whether again step S105, judge generation systems gravity treatment in the time that the second timer S activates; As otherwise return to step S101;
Step S106, in this way, punishment side-play amount is made as to the first value, be also the initial value of pinp_offset, and start the first timer T, in the present embodiment, the initial value of this pinp_offset is 9dB, the gravity treatment threshold value of system like this is that the initial gravity treatment threshold value of system setting adds the value of pinp_offset, thereby has increased thus gravity treatment threshold value.
Second stage, for the table tennis protection stage, comprises the steps:
Step S107, judges whether system gravity treatment has occurred again in predetermined time N;
Step S108, in this way, will punish that side-play amount increases by the first preset value, increase penalty value step-length, new punishment side-play amount=punishment side-play amount+penalty value step-length, and restart the first timer T, the first preset value (being penalty value step-length) is 6dB in the present embodiment;
Step S109, as no, will punish that side-play amount reduces by the second preset value, and restart the first timer T, this second preset value is 3dB in the present embodiment.
Phase III, for table tennis protection ending phase, comprises the steps:
Step S110, judges whether punishment side-play amount is kept to zero; As no, return to step S107, judge whether to have occurred again system gravity treatment in predetermined time N, and by step S108 and the corresponding increase of step S109 or minimizing punishment side-play amount;
Step S111, if punishment offset minus is zero, thereby does not restart the first timer T, and the absolute thresholding (being the initial gravity treatment threshold value that system arranges) of the first communications network system recovers normal, and the protection process of once rattling finishes.
In the specific implementation, the first preset value that the first value of above-mentioned punishment side-play amount, punishment side-play amount increase, the second preset value that punishment side-play amount reduces are fixed value, are arranged or are controlled by the parameter in system by system.In the above-described embodiment, the first value of punishment side-play amount can be made as 9dB, and the first preset value that punishment side-play amount increases is penalty value step-length, can be made as 9dB, and the second preset value that punishment side-play amount reduces can be made as 3dB.Simultaneously, the method is not distinguished the reuse adoption process of mobile terminal under packet transfer mode (packet transfer) and idle pulley (IDLE), and the process that second generation communications network system is transformed into third generation communications network system comprises that second generation communications network system is transformed into the process of unsuccessfully returning after the gravity treatment failure of second generation communications network system to reuse adoption process and the third generation communications network system of third generation communications network system; Third generation communications network system is transformed into second generation communications network system process and comprises that third generation communications network system is transformed into the gravity treatment of second generation communications network system and second generation communications network system is transformed into the process of unsuccessfully returning after third generation communications network system gravity treatment failure; But consider that it is not to measure through TD (many yards of time-divisions) communication system the process that assessment occurs that third generation communications network system is transformed into the process of unsuccessfully returning after second generation communications network system gravity treatment failure; so only carry out the included action of above-mentioned table tennis environment the stage of recognition when this process, do not carry out table tennis included action of protection stage.
Known by above-mentioned method, duration that the present invention exists in a communications network system according to mobile terminal and whether gravity treatment occurs and dynamically adjust punishment side-play amount, reach thus the object of dynamic adjustment gravity treatment threshold value, thereby self adaptation is adjusted the problem of gravity treatment threshold value to prevent that ping-pong reselection from occurring.
Compared with prior art, the present invention by record move terminal the time in first and second communications network system identify table tennis environment, and under table tennis environment, start table tennis protection, raise gravity treatment threshold value, and the threshold value of raising can reduce as time goes by and progressively; If but there is again gravity treatment in centre; can automatically increase so gravity treatment threshold value; when mobile terminal continuously first or second communication network system on stopped after the set time; table tennis protection can disappear automatically; so, according to the concrete condition of network, carry out self adaptation and adjust the problem of thresholding added value to prevent that ping-pong reselection from occurring.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (5)
1. a method that prevents ping-pong reselection, is characterized in that, comprises table tennis environment the stage of recognition, table tennis protection stage and table tennis protection ending phase;
Described table tennis environment the stage of recognition comprises the steps:
First and second timer is set, respectively in order to add up the time of mobile terminal in first and second communications network system;
In the time being converted to second communication network system from the first communications network system, start the first timer;
If generation systems gravity treatment, starts the second timer and closes the first timer in the time that the first timer activates;
If generation systems gravity treatment again in the time that the second timer activates, enters the table tennis protection stage, punishment side-play amount is made as to the first value, and starts the first timer;
The described table tennis protection stage comprises the steps:
Whether judgement there is again system gravity treatment within the predetermined time;
In this way, will punish that side-play amount increases by the first preset value, and restart the first timer;
If in the not generation systems gravity treatment of above-mentioned predetermined time, will punish that side-play amount reduces by the second preset value, and restart the first timer;
It is zero that the described table tennis protection stage continues to punishment offset minus;
Described table tennis protection ending phase comprises the steps:
After described punishment side-play amount reduces by the second preset value, judge whether punishment side-play amount is kept to zero;
As otherwise judge whether, in predetermined time, system gravity treatment has occurred again, and increase or reduce punishment side-play amount by the step in described table tennis protection stage is corresponding;
Do not restart in this way the first timer, the absolute thresholding of the first communications network system recovers normal, and the table tennis protection stage finishes.
2. the method that prevents ping-pong reselection as claimed in claim 1, is characterized in that: described the first communications network system is third generation communications network system, and second communication network system is second generation communications network system.
3. the method that prevents ping-pong reselection as claimed in claim 1, is characterized in that: the second preset value of the first value of punishment side-play amount, the first preset value that punishment side-play amount increases, the minimizing of punishment side-play amount is fixed value.
4. the method that prevents ping-pong reselection as claimed in claim 2, is characterized in that: the process that second generation communications network system is transformed into third generation communications network system comprises that second generation communications network system is transformed into the process of unsuccessfully returning after the gravity treatment failure of second generation communications network system to reuse adoption process and the third generation communications network system of third generation communications network system.
5. the method that prevents ping-pong reselection as claimed in claim 2, is characterized in that: wherein third generation communications network system is transformed into second generation communications network system process and comprises that third generation communications network system is transformed into the gravity treatment of second generation communications network system and second generation communications network system and is transformed into the process of unsuccessfully returning after third generation communications network system gravity treatment failure.
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| CN201010526510.4A CN102457927B (en) | 2010-10-27 | 2010-10-27 | Method for preventing ping-pong reselection |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103906156A (en) * | 2012-12-25 | 2014-07-02 | 中国移动通信集团贵州有限公司 | Network reselection method and apparatus, and terminal |
| CN105027625B (en) * | 2013-03-04 | 2018-11-27 | Lg 电子株式会社 | Residence reselecting and its user equipment |
| CN104144452B (en) * | 2013-05-08 | 2017-09-08 | 展讯通信（上海）有限公司 | Ping-pong reselection identification, the method and apparatus prevented between the pattern of communication terminal |
| CN104144451B (en) * | 2013-05-08 | 2017-11-21 | 展讯通信（上海）有限公司 | Ping-pong reselection identification, the method and apparatus prevented between the pattern of communication terminal |
| CN104519510B (en) * | 2013-09-30 | 2018-02-23 | 中国移动通信集团北京有限公司 | A kind of optimization method and device of cell reselection parameters |
| CN105530671B (en) * | 2015-12-14 | 2019-03-01 | 福建星网锐捷网络有限公司 | Inhibit the method and mobility management entity of pingpang handoff |
| CN107548109B (en) * | 2016-06-28 | 2020-04-10 | 大唐移动通信设备有限公司 | Cell switching method and device |
| CN107371202B (en) * | 2017-08-15 | 2019-03-05 | 维沃移动通信有限公司 | A kind of method and mobile terminal of mobile terminal gravity treatment LTE cell |
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| CN1794681A (en) * | 2005-12-29 | 2006-06-28 | 上海贝豪通讯电子有限公司 | Switchover method between 3G network and WIFI network based on location information |
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