CN102843735A - Cell switching method and system - Google Patents
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- H—ELECTRICITY
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention provides a cell switching method and a cell switching system, relating to the mobile communication field and solving the problem that MS (Mobile Station) switch affects the sensibility of users. The method comprises the following steps: the base station controller inquiries locally maintained neighboring channel interference fringe information when the mobile station needs to be indicated to switch from the current service cell to the neighboring cell; the base station controller selects a channel having low interference fringe level to the mobile station from each neighboring cell of the service cells; the base station controller indicates the mobile station to switch to the distributed channel. The technical scheme is applied to the mobile communication network and achieves the interference-based cell switching.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of cell switching method and system.
Background technology
Maximum characteristics of GSM are exactly that the user can obtain normal network service in moving.And handoff technique is to guarantee that the user obtains a key technology of high network quality service in moving process.
Existing scheme is: travelling carriage (MS) monitoring system message in free time or communication process, obtain the information such as BA table that network side issues.After this; MS utilizes idle frame to seek the information of adjacent cells of indicating in the system message constantly; The frequency correction channel (FCCH) of corresponding adjacent area is carried out synchronizing channel (SCH) decoding, and the adjacent area level that combines to measure is offered base station controller (iBSC or BSC) through measurement report in form.IBSC selects optimum sub-district and notifies MS to switch according to strong and weak ordering of reporting neighboring cell broadcast channel (BCCH) level.
Yet, no matter be the adjacent area frequency point information that network side issues, or the MS neighboring BS information that utilizes idle frame to search for constantly, all only be adjacent area BCCH frequency level power information.At channeling more and more closely under the present situation, the regional coverage of each channeling bunch is more and more littler, and the frequency configuration of neighboring interval is for happen occasionally with phenomenon frequently especially.Unavoidablely be; Under current changing method pattern, cover better sub-district though make MS cut one, very possible owing to distribute to the bigger interference of adjacent area Traffic Channel (TCH) existence of MS; Cause that MS takes place by frequent the switching even call drop, thereby have a strong impact on user's perceptibility.
Summary of the invention
The invention provides a kind of cell switching method and system, solved MS and switched the problem that influences user's perceptibility.
A kind of cell switching method comprises:
Base station controller needs indications travelling carriage from current service cell when switch the adjacent area, the channels of neighboring areas interference fringe information of inquiry local maintenance;
Said base station controller selects the lower channel allocation of interference fringe rank to give said travelling carriage from each adjacent area of said Serving cell;
Said base station controller indicates said travelling carriage to switching for the channel of its distribution.
Preferably, said base station controller selects the lower channel allocation of interference fringe rank to comprise for said travelling carriage from each adjacent area of said Serving cell:
Said base station controller obtains interference fringe rank and channel allocation priority relationship allocation list from the radio operation maintenance centre; Said interference fringe rank has write down the corresponding channel allocation priority value of interference fringe level range with the list item of channel allocation priority relationship allocation list, and the channel allocation priority value that the channel that the interference fringe rank is low more is corresponding is high more;
Said base station controller contrasts said interference fringe rank and channel allocation priority relationship allocation list according to the channels of neighboring areas interference fringe information of local maintenance, confirms the channel allocation priority that each channels of neighboring areas is corresponding;
Said base station controller sorts to each adjacent area by each adjacent area BCCH level power order from high to low of said Serving cell;
Said base station controller selective channel from the more forward adjacent area of ordering distributes the lower channel allocation of priority value to give said travelling carriage.
Preferably, said base station controller needs indications travelling carriage from current service cell when switch the adjacent area, before the step of the channels of neighboring areas interference fringe information of inquiry local maintenance, also comprise:
Said base station controller receives the indication that startup interference fringe that said radio operation maintenance centre issues is judged; In this indication, carry channel allocation priority threshold and switch parameter, said switch parameter is used to indicate said base station controller to start the interference fringe judgement.
Preferably, said base station controller selective channel from the more forward adjacent area of ordering distributes the lower channel allocation of priority value to comprise for said travelling carriage:
Said base station controller checks whether exist channel allocation priority to be lower than the channel of said channel allocation priority threshold in each adjacent area in regular turn;
When detecting the adjacent area of the channel that exists channel allocation priority to be lower than said channel allocation priority threshold, selective channel distributes the minimum channel allocation of priority value to give said travelling carriage from this adjacent area.
Preferably, said base station controller is checked in regular turn after the step of the channel that whether exists channel allocation priority to be lower than said channel allocation priority threshold in each adjacent area, is also comprised:
When all adjacent areas did not all exist channel allocation priority to be lower than the channel of said channel allocation priority threshold, selective channel distributed the minimum channel allocation of priority value to give said travelling carriage from first the adjacent area of sorting.
Preferably, above-mentioned cell switching method also comprises:
Through setting up and safeguard interference fringe rank and channel allocation priority relationship allocation list in said radio operation maintenance centre, and, the channel allocation priority threshold is set according to Serving cell and adjacent area wireless quality.
Preferably, above-mentioned cell switching method also comprises:
Said base station controller is collected the interference fringe information that BTS reports; According to the channels of neighboring areas interference fringe information of this interference fringe information, be specially and upgrade idle channels of neighboring areas interference fringe information and empty the channels of neighboring areas interference fringe information that activates channel at the said Serving cell of local maintenance.
Preferably, above-mentioned cell switching method also comprises:
When said travelling carriage need carry out retrospective switching, the said base station controller directly arbitrary channel of the said travelling carriage of indication in the highest sub-district of BCCH level power switched.
The present invention also provides a kind of sub-district switched system, comprises base station controller;
Said base station controller; Be used for base station controller needs indications travelling carriage from current service cell when switch the adjacent area; The channels of neighboring areas interference fringe information of inquiry local maintenance; From each adjacent area of said Serving cell, select the lower channel allocation of interference fringe rank to give said travelling carriage, and indicate said travelling carriage to switching for the channel of its distribution.
Preferably, above-mentioned sub-district switched system also comprises the radio operation maintenance centre;
Said radio operation maintenance centre; Be used for setting up and safeguarding interference fringe rank and channel allocation priority relationship allocation list; And according to Serving cell and adjacent area wireless quality; The channel allocation priority threshold is set, and issues the indication that starts the interference fringe judgement, in this indication, carry the channel allocation priority threshold to said base station controller;
Said base station controller; Also be used for obtaining interference fringe rank and channel allocation priority relationship allocation list from the radio operation maintenance centre; Said interference fringe rank has write down the corresponding channel allocation priority value of interference fringe level range with the list item of channel allocation priority relationship allocation list, and the channel allocation priority value that the channel that the interference fringe rank is low more is corresponding is high more.
The invention provides a kind of cell switching method and system; Base station controller needs indications travelling carriage from current service cell when switch the adjacent area; The channels of neighboring areas interference fringe information of inquiry local maintenance from each adjacent area of said Serving cell, selects the lower channel allocation of interference fringe rank to give said travelling carriage; Indicate said travelling carriage to switching then for the channel of its distribution; When instruct MS is switched, taken into full account channel disturbance, realized guaranteeing the MS sub-district switching under the quality of service prerequisite, solved MS and switched the problem that influences user's perceptibility.
Description of drawings
The flow chart of a kind of cell switching method that Fig. 1 provides for embodiments of the invention one;
Fig. 2 is the particular flow sheet of step 104 among Fig. 1;
The structured flowchart of a kind of sub-district switching system moduleization that Fig. 3 provides for embodiments of the invention two;
Fig. 4 combines sub-district switched system shown in Figure 3 to accomplish the flow chart that switches in the embodiments of the invention two.
Embodiment
No matter be the adjacent area frequency point information that network side issues, or the MS neighboring BS information that utilizes idle frame to search for constantly, all only be adjacent area BCCH frequency level power information, there is not TCH disturbed condition information, ignored the disturbed condition of the switching target TCH that distributes to MS.Meanwhile, at channeling more and more closely under the present situation, the regional coverage of each channeling bunch is more and more littler, and the frequency configuration of neighboring interval is for happen occasionally with phenomenon frequently especially.Unavoidablely be; Under current changing method pattern, cover better sub-district though make MS cut one, very possible owing to distribute to the bigger interference of TCH existence of MS; Cause that MS takes place by frequent the switching even call drop, thereby have a strong impact on user's perceptibility.
In order to address the above problem, embodiments of the invention provide a kind of cell switching method and system.Hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
At first combine accompanying drawing, embodiments of the invention one are described.
The embodiment of the invention provides a kind of cell switching method; Based on the switching target channel disturbance breath of taking a message, evaded and distributed the mobile phone incision to have the switching target channel problem of disturbing, effectively promoted switch decision reasonability accuracy; Reduce frequent switching times to a certain extent; And the switching number of dropped calls, improve indexs such as handover success rate, improved user's perceptibility.
The related base station controller of the embodiment of the invention can be iBSC or BSC, no matter is iBSC or BSC, uses the principle of the cell switching method completion switching that the embodiment of the invention provided all identical, describes so the embodiment of the invention only is example with BSC.It is as shown in Figure 1 to use this cell switching method to accomplish the flow process of switching, and comprising:
In the embodiment of the invention; OMCR safeguards based on interference fringe switch decision parameter information according to the network planning; Be stored in interference fringe rank and channel allocation priority relationship allocation list (as interference fringe is set at the channel allocation high priority below 2 grades; 2 grades to 4 grades are set to high medium priority; Be set to low priority more than 4 grades) in, said interference fringe rank has write down the corresponding channel allocation priority value of interference fringe level range with the list item of channel allocation priority relationship allocation list, and the channel allocation priority value that the channel that the interference fringe rank is low more is corresponding is high more.
Preferably; In order from a plurality of adjacent areas, to filter out suitable adjacent area and channel efficiently; Can also the channel allocation priority threshold be set according to Serving cell and adjacent area wireless quality; For example, when wireless quality is better, be provided with the channel allocation priority threshold higher (as only distributing the channel of high priority).
Preferably, this step function can be provided with interference fringe switch decision maintenance module and realizes through in OMCR, increasing.
In the embodiment of the invention; Dispose among the OMCR and whether launch the switch that judgement is switched according to interference fringe; When this switch opens; OMCR send to start the indication that interference fringe is judged to BSC, in this indication, carries the channel allocation priority threshold and with interference fringe switching target small area channel priority threshold parameter and launch the switch parameter that interference fringe adjudicates and be handed down to BSC.Preferably, OMCR issues switch parameter when each the switching, issue in the time of can creating in the website adjacent area or revise.
Preferably, can in the site parameter configuration messages that BSC issues, add the switch parameter field, in this field, fill in switch parameter, start the flow process of switching according to interference fringe judgement carrying out sub-district with indication BSC at OMCR.
The interference fringe decision parameter of receiving as BSC is when opening, and according to the neighbor cell configuration data, the interference fringe information real-time that BTS is reported is updated in each adjacent area tables of data.Preferably, can in BSC, add the function that channels of neighboring areas interference fringe maintenance of information module realizes the interference fringe maintenance of information.
Preferably; Also can in BSC, increase based on the take a message switch decision module of breath of switching target channel disturbance; When needs distribute the switching target channel, distribute destination channel according to the interference fringe data decision of real-time update based on the take a message switch decision module of breath of switching target channel disturbance.
Preferably, BSC detects whether switch reasons is retrospective switching, if skip interference fringe information judgement testing process for retrospective switching, accomplishes according to switching flow of the prior art and switches; Otherwise, carry out interference fringe information judgement testing process, change step 103 over to.Preferably, can in BSC, add based on the switching target channel disturbance and take a message the switch decision module of breath to realize the function of switch decision.
In the embodiment of the invention, BSC safeguards channels of neighboring areas interference fringe information according to the network planning.Preferably, can be through in BSC, adding the function that channels of neighboring areas interference fringe maintenance of information module realizes safeguarding channels of neighboring areas interference fringe information.
Maintaining method to channels of neighboring areas interference fringe information is specific as follows:
After channel activated, the interference fringe information of this channel of BSC local maintenance emptied; For the channel of free time, its corresponding interference fringe information is regularly at the BSC local update, and the update cycle is adjusted according to base station interference band report cycle.
This step is specifically as shown in Figure 2, comprising:
According to channel disturbance band grade, in conjunction with interference fringe rank on the OMCR and channel allocation priority relationship allocation list adjustment channel allocation priority.
Each adjacent area BCCH level power order from high to low that step 1043, said BSC press said Serving cell sorts to each adjacent area;
In this step, because the interference fringe rank correlation of channel allocation priority and channel couplet, so can select the junior channel allocation of interference fringe to give MS according to channel allocation priority.Preferably, can adopt the mode of Cycle Screening from a plurality of adjacent areas, to select best adjacent area and channel, concrete mode is following:
Said base station controller checks whether exist channel allocation priority to be lower than the channel of said channel allocation priority threshold in each adjacent area in regular turn;
When detecting the adjacent area of the channel that exists channel allocation priority to be lower than said channel allocation priority threshold, selective channel distributes the minimum channel allocation of priority value to give said travelling carriage from this adjacent area.
For example, to the adjacent area sort the back according to the ordering cis-position successively with the adjacent area be called first candidate adjacent, second candidate adjacent ..., the N candidate adjacent.According to interference fringe rank and channel allocation priority relationship allocation list and channels of neighboring areas interference fringe information; Whether judge has incision channel to be allocated less than channel allocation priority in first candidate adjacent; If have, then switch distribution from channel that priority is the highest of this cell selecting; Otherwise, the second candidate adjacent channel is repeated above-mentioned judgement, and the like.If all do not have incision channel to be allocated in all candidate adjacent, then from first candidate adjacent, select the channel that priority is the highest to switch distribution less than the channel allocation priority threshold.
The embodiment of the invention provides a kind of cell switching method; BSC needs indications travelling carriage from current service cell when switch the adjacent area; The channels of neighboring areas interference fringe information of inquiry local maintenance from each adjacent area of said Serving cell, selects the lower channel allocation of interference fringe rank to give said travelling carriage; Indicate said travelling carriage to switching then for the channel of its distribution; When instruct MS is switched, taken into full account channel disturbance, realized guaranteeing the MS sub-district switching under the quality of service prerequisite, solved MS and switched the problem that influences user's perceptibility.Through adding based on the take a message judgment condition of breath of switching target channel disturbance; Optimize the switch decision flow process; Make BSC can initiatively discern switching target small area channel disturbance situation; Prevent effectively to promote network service quality, promote user's perceptibility to disturbing the not good channels of neighboring areas of big quality to initiate to switch.
Below in conjunction with accompanying drawing, embodiments of the invention two are described.
It is a kind of based on interference fringe level cell switched system that the embodiment of the invention provides, and comprises BSC;
Said BSC; Be used for BSC needs indications travelling carriage from current service cell when switch the adjacent area; The channels of neighboring areas interference fringe information of inquiry local maintenance; From each adjacent area of said Serving cell, select the lower channel allocation of interference fringe rank to give said travelling carriage, and indicate said travelling carriage to switching for the channel of its distribution.
Preferably, this system also comprises OMCR;
Said OMCR; Be used for setting up and safeguarding interference fringe rank and channel allocation priority relationship allocation list; And according to Serving cell and adjacent area wireless quality; The channel allocation priority threshold is set, and issues the indication that starts the interference fringe judgement, in this indication, carry the channel allocation priority threshold to said BSC;
Said BSC; Also be used for obtaining interference fringe rank and channel allocation priority relationship allocation list from OMCR; Said interference fringe rank has write down the corresponding channel allocation priority value of interference fringe level range with the list item of channel allocation priority relationship allocation list, and the channel allocation priority value that the channel that the interference fringe rank is low more is corresponding is high more.
Preferably, the sub-district switching system moduleization that can also embodiments of the invention be provided is integrated in module among OMCR and the BSC, to accomplish corresponding function.Modular sub-district switched system structure is as shown in Figure 3, and OMCR increases interference fringe switch decision maintenance module, and this module is safeguarded based on interference fringe switch decision parameter information according to the network planning.Comprise interference fringe rank and channel allocation priority relationship allocation list, optimum implementation suggestion is configured to 5 grades (can represent best for 1 grade) with channel allocation priority, the channel allocation priority threshold, and optimum implementation suggestion is 3 with this threshold setting.
BSC increases channels of neighboring areas interference fringe maintenance of information module.This module is safeguarded channels of neighboring areas interference fringe information according to the network planning.In addition, BSC also need increase based on the take a message switch decision module of breath of switching target channel disturbance, and this module receives the interference fringe data that base station reports, and according to channels of neighboring areas interference fringe information, judgement MS switching target channel.
Fig. 4 describes is based on the take a message hand-off process flow chart of switch decision module of breath of switching target channel disturbance, may further comprise the steps:
Step 401, BSC receive the MS measurement report, and whether after carrying out the adjacent area selection ordering of present stage, detecting switch reasons is retrospective switching, if change existing sub-district switching flow over to; Otherwise, change step 402 over to.
Step 402, judge whether the adjacent area of current check is last adjacent area after arranging in regular turn; If change step 405 over to, otherwise change step 403 over to.
Step 403, the channels of neighboring areas interference fringe information of safeguarding according to channels of neighboring areas interference fringe maintenance of information module; Said interference fringe rank and channel allocation priority relationship allocation list that contrast interference fringe switch decision maintenance module obtains judge that the channel allocation priority that in the adjacent area of current check whether incision channel to be allocated is arranged is less than the channel allocation priority threshold.If have, change step 404 over to; Otherwise, change step 402 over to, the channel of next adjacent area is repeated above-mentioned judgement, and the like;
Step 404, from the adjacent area of current check, select the channel that priority is the highest to switch distribution;
If the channel allocation priority of all not having incision channel to be allocated in all candidate adjacent of step 405 less than the channel allocation priority threshold, then selects the channel that priority is the highest to switch distribution from first candidate adjacent.
The sub-district switched system that the embodiment of the invention provides; Can combine with a kind of cell switching method that embodiments of the invention are provided, base station controller needs indications travelling carriage from current service cell when switch the adjacent area, the channels of neighboring areas interference fringe information of inquiry local maintenance; From each adjacent area of said Serving cell; Select the lower channel allocation of interference fringe rank to give said travelling carriage, indicate said travelling carriage then, when instruct MS is switched, taken into full account channel disturbance to for the channel of its distribution switches; Realized guaranteeing the MS sub-district switching under the quality of service prerequisite, solved MS and switched the problem that influences user's perceptibility.
The all or part of step that the one of ordinary skill in the art will appreciate that the foregoing description program circuit that can use a computer is realized; Said computer program can be stored in the computer-readable recording medium; Said computer program (like system, unit, device etc.) on the relevant hardware platform is carried out; When carrying out, comprise one of step or its combination of method embodiment.
Alternatively, all or part of step of the foregoing description also can use integrated circuit to realize, these steps can be made into integrated circuit modules one by one respectively, perhaps a plurality of modules in them or step is made into the single integrated circuit module and realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
Each device/functional module/functional unit in the foregoing description can adopt the general calculation device to realize, they can concentrate on the single calculation element, also can be distributed on the network that a plurality of calculation element forms.
Each device/functional module/functional unit in the foregoing description is realized with the form of software function module and during as independently production marketing or use, can be stored in the computer read/write memory medium.The above-mentioned computer read/write memory medium of mentioning can be a read-only memory, disk or CD etc.
Any technical staff who is familiar with the present technique field can expect changing or replacement in the technical scope that the present invention discloses easily, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the described protection range of claim.
Claims (10)
1. a cell switching method is characterized in that, comprising:
Base station controller needs indications travelling carriage from current service cell when switch the adjacent area, the channels of neighboring areas interference fringe information of inquiry local maintenance;
Said base station controller selects the lower channel allocation of interference fringe rank to give said travelling carriage from each adjacent area of said Serving cell;
Said base station controller indicates said travelling carriage to switching for the channel of its distribution.
2. cell switching method according to claim 1 is characterized in that, said base station controller selects the lower channel allocation of interference fringe rank to comprise for said travelling carriage from each adjacent area of said Serving cell:
Said base station controller obtains interference fringe rank and channel allocation priority relationship allocation list from the radio operation maintenance centre; Said interference fringe rank has write down the corresponding channel allocation priority value of interference fringe level range with the list item of channel allocation priority relationship allocation list, and the channel allocation priority value that the channel that the interference fringe rank is low more is corresponding is high more;
Said base station controller contrasts said interference fringe rank and channel allocation priority relationship allocation list according to the channels of neighboring areas interference fringe information of local maintenance, confirms the channel allocation priority that each channels of neighboring areas is corresponding;
Said base station controller sorts to each adjacent area by each adjacent area broadcast channel (BCCH) level power order from high to low of said Serving cell;
Said base station controller selective channel from the more forward adjacent area of ordering distributes the lower channel allocation of priority value to give said travelling carriage.
3. cell switching method according to claim 2 is characterized in that, said base station controller needs indications travelling carriage from current service cell when switch the adjacent area, before the step of the channels of neighboring areas interference fringe information of inquiry local maintenance, also comprise:
Said base station controller receives the indication that startup interference fringe that said radio operation maintenance centre issues is judged; In this indication, carry channel allocation priority threshold and switch parameter, said switch parameter is used to indicate said base station controller to start the interference fringe judgement.
4. cell switching method according to claim 3 is characterized in that, said base station controller selective channel from the more forward adjacent area of ordering distributes the lower channel allocation of priority value to comprise for said travelling carriage:
Said base station controller checks whether exist channel allocation priority to be lower than the channel of said channel allocation priority threshold in each adjacent area in regular turn;
When detecting the adjacent area of the channel that exists channel allocation priority to be lower than said channel allocation priority threshold, selective channel distributes the minimum channel allocation of priority value to give said travelling carriage from this adjacent area.
5. cell switching method according to claim 4 is characterized in that, said base station controller is checked in regular turn after the step of the channel that whether exists channel allocation priority to be lower than said channel allocation priority threshold in each adjacent area, also comprised:
When all adjacent areas did not all exist channel allocation priority to be lower than the channel of said channel allocation priority threshold, selective channel distributed the minimum channel allocation of priority value to give said travelling carriage from first the adjacent area of sorting.
6. cell switching method according to claim 4 is characterized in that, this method also comprises:
Through setting up and safeguard interference fringe rank and channel allocation priority relationship allocation list in said radio operation maintenance centre, and, the channel allocation priority threshold is set according to Serving cell and adjacent area wireless quality.
7. cell switching method according to claim 1 is characterized in that, this method also comprises:
Said base station controller is collected the interference fringe information that BTS reports; According to the channels of neighboring areas interference fringe information of this interference fringe information, be specially and upgrade idle channels of neighboring areas interference fringe information and empty the channels of neighboring areas interference fringe information that activates channel at the said Serving cell of local maintenance.
8. according to claim 1 or 4 described cell switching methods, it is characterized in that this method also comprises:
When said travelling carriage need carry out retrospective switching, the said base station controller directly arbitrary channel of the said travelling carriage of indication in the highest sub-district of BCCH level power switched.
9. a sub-district switched system is characterized in that, comprises base station controller;
Said base station controller; Be used for base station controller needs indications travelling carriage from current service cell when switch the adjacent area; The channels of neighboring areas interference fringe information of inquiry local maintenance; From each adjacent area of said Serving cell, select the lower channel allocation of interference fringe rank to give said travelling carriage, and indicate said travelling carriage to switching for the channel of its distribution.
10. sub-district according to claim 9 switched system is characterized in that this system also comprises the radio operation maintenance centre;
Said radio operation maintenance centre; Be used for setting up and safeguarding interference fringe rank and channel allocation priority relationship allocation list; And according to Serving cell and adjacent area wireless quality; The channel allocation priority threshold is set, and issues the indication that starts the interference fringe judgement, in this indication, carry the channel allocation priority threshold to said base station controller;
Said base station controller; Also be used for obtaining interference fringe rank and channel allocation priority relationship allocation list from the radio operation maintenance centre; Said interference fringe rank has write down the corresponding channel allocation priority value of interference fringe level range with the list item of channel allocation priority relationship allocation list, and the channel allocation priority value that the channel that the interference fringe rank is low more is corresponding is high more.
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| CN201110167530.1A CN102843735B (en) | 2011-06-21 | 2011-06-21 | Cell switching method and system |
| PCT/CN2012/071182 WO2012174867A1 (en) | 2011-06-21 | 2012-02-16 | Cell handover method and system |
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| CN201110167530.1A CN102843735B (en) | 2011-06-21 | 2011-06-21 | Cell switching method and system |
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| CN105578546B (en) * | 2016-01-15 | 2018-09-07 | 华信咨询设计研究院有限公司 | The adaptive LTE switching methods of sine of curstomer-oriented perception |
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| Publication number | Publication date |
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| CN102843735B (en) | 2018-03-23 |
| WO2012174867A1 (en) | 2012-12-27 |
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