CN102612105A - Method for avoiding handover drop in 1X-DO (data optimized) carrier transfer boundary zone - Google Patents
Method for avoiding handover drop in 1X-DO (data optimized) carrier transfer boundary zone Download PDFInfo
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- CN102612105A CN102612105A CN2012100793786A CN201210079378A CN102612105A CN 102612105 A CN102612105 A CN 102612105A CN 2012100793786 A CN2012100793786 A CN 2012100793786A CN 201210079378 A CN201210079378 A CN 201210079378A CN 102612105 A CN102612105 A CN 102612105A
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Abstract
The invention discloses a method for avoiding handover drop in a 1X-DO (data optimized) carrier transfer boundary zone, and relates to the field of CDMA (code division multiple access) mobile communication. The method comprises the following steps: setting an isolation zone between a carrier transfer zone and a carrier non-transfer zone for the 1X-DO business; and when a terminal initiates a calling for establishing business connection in a boundary zone of the isolation zone and the carrier non-transfer zone, judging if the business carried in a transfer carrier frequency in the carrier transfer zone is converted from the 1X business to the DO business by a base station, the base station indicates the terminal to perform the carrier frequency switching operation if judging that the business carried in the transfer carrier frequency in the carrier transfer zone is converted from the 1X business to the DO business, so that the 1X business can be established on the non-transfer carrier frequency as far as possible; and the base station does not indicate the terminal to perform any carrier frequency switching operation if judging that the business carried in the transfer carrier frequency in the carrier transfer zone is not converted from the 1X business to the DO business. The method for avoiding the handover drop in the 1X-DO (data optimized) carrier transfer boundary zone disclosed by the invention solves the handover drop problem of the 1X business in the boundary zone.
Description
Technical field
The present invention relates to code division multiple access cdma mobile communication field, the particularly a kind of 1X-DO of solution carrier wave changes the method that borderline region switches the call drop problem mutually.
Background technology
Value has dropped to about 2 U.S. dollars voice ARPU (Average Revenue Per User, every user's average income), and data ARPU value still remains on about 10 U.S. dollars.India's wireless data market development has a high potential, and therefore, operator disposes in the scale of carrying forward vigorously radio data network, promotes the competitiveness of aspects such as the network coverage, performance and service.
To being subject to the operator of carrier frequency point, press for the technological evolution and the solution of spectrum efficiency lifting aspect.Therefore propose the 1X-DO carrier wave and exchanged the solution that this type can need not be changed and upgrade through the soft upgrading of existing network, existing network terminal.Said 1X-DO carrier wave exchanges and be meant that the business of carriers carry can change between 1X and DO.
Fig. 1 is the area dividing sketch map of the cdma network area of coverage that provides of prior art, and is as shown in Figure 1, and the cdma network area of coverage comprises that carrier wave changes A district, district and the non-mutual commentaries on classics of carrier wave district mutually.Wherein, said carrier wave changes the mutual carrier frequency F3 of F2, carrying DO business frequently that reprints that A district, district has carrier frequency F1, carrying 1X business or the DO business of carrying the 1X business mutually; The non-mutual commentaries on classics of said carrier wave district has carrier frequency F2, the professional carrier frequency F3 of carrying DO that carries the professional carrier frequency F1 of 1X, carries the 1X business.
After carrier wave changeed mutual reprintings in A district, district mutually F2 institute loaded service converts DO into from 1X frequently, the 1X business was changeed the district when moving mutually from the non-mutual commentaries on classics of carrier wave district to carrier wave, cause call drop because of switching for the business meeting that is based upon on the F2.
Summary of the invention
The object of the present invention is to provide a kind of 1X-DO of avoiding carrier wave to change the method that call drop is switched in the frontier district mutually, can solve the professional switching call drop problem of borderline region 1X better.
According to an aspect of the present invention, provide a kind of 1X-DO of avoiding carrier wave to change the method that call drop is switched in the frontier district mutually, having comprised:
Change mutually between district and the non-mutual commentaries on classics of the carrier wave district isolated area is set being used for the professional carrier wave that changes mutually of 1X-DO;
Borderline region when the terminal in the non-mutual commentaries on classics of said isolated area and carrier wave district makes a call when setting up professional the connection, and whether the mutual reprinting frequency F2 institute loaded service that the said carrier wave of base station judges changes the district mutually converts the DO business into from the 1X business;
The mutual reprinting of changeing the district mutually when base station judges carrier wave F2 institute loaded service frequently converts DO into when professional from the 1X business, and the base station indicating terminal carries out the carrier frequency handover operation, so that as much as possible its 1X business is based upon on non-mutual the reprintings frequency;
The mutual reprinting of changeing the district mutually when base station judges carrier wave F2 loaded service does not frequently convert DO into when professional from the 1X business, and the carrier frequency handover operation is carried out in base station not indicating terminal.
Preferably, said isolated area disposes carrier frequency F2.
Preferably, the mutual reprinting of changeing the district mutually when carrier wave institute's loaded service frequently converts DO into when professional from the 1X business, and the carrier frequency F2 of isolated area is turn-offed.
Preferably; The base station the terminal of confirming to be positioned at borderline region setting up on the carrier frequency F2 of border call out after; Judge that whether the terminal satisfy the condition frequently of changing, and satisfying when changing frequently condition that indicating terminal switches on professional non-mutual the reprintings frequency of the carrying 1X of appointment from border carrier frequency F2.
Preferably, the base station judges according to the pilot measurement reports domain message of terminal to report whether the terminal satisfies the condition frequently of changing.
Preferably, said method also comprises:
Thresholding, load appointment thresholding and overload threshold are inserted according to the load control of the border carrier frequency F2 of borderline region in the base station, confirm the frequency of terminal at the borderline region call setup.
Preferably, when the non-mutual load of reprinting frequency of borderline region inserted thresholding less than said load control, the base station was with the said non-mutual frequency of confirming as terminal call foundation frequently of reprinting.
Preferably; When borderline region non-mutual reprinted load frequently and is not less than said load control and inserts thresholding; Whether the said non-mutual frequency of reprinting of base station judges assigns thresholding less than load with the load difference of border carrier frequency F2, if judged result is assigned thresholding for the load difference less than load, then the base station is confirmed as the frequency that terminal call is set up frequently with said non-mutual reprinting; Otherwise, said border carrier frequency F2 is confirmed as the frequency that terminal call is set up.
Preferably, when non-mutual reprinting surpasses overload threshold frequently, and during the carrier frequency F2 nonoverload of border, the frequency that terminal call is set up is confirmed as with said border carrier frequency F2 in the base station.
Preferably, said method also comprises:
The mutual reprinting of changeing the district mutually when carrier wave F2 institute loaded service frequently converts DO into when professional from the 1X business, and the Overhead Message that border carrier frequency F2 will not carried in the base station is issued to the terminal that is positioned at borderline region, make the terminal can standby on said border carrier frequency F2.
Compared with prior art, beneficial effect of the present invention is: the invention solves the professional switching call drop problem of borderline region 1X.
Description of drawings
Fig. 1 is the area dividing sketch map of the cdma network area of coverage that provides of prior art;
Fig. 2 is that the 1X-DO carrier wave of avoiding that the embodiment of the invention provides changes the method flow diagram that call drop is switched in the frontier district mutually;
Fig. 3 is the area dividing sketch map of the cdma network area of coverage that provides of the embodiment of the invention;
Fig. 4 is the borderline region load balancing control sketch map that the embodiment of the invention provides.
Embodiment
, should be appreciated that following illustrated preferred embodiment only is used for explanation and explains the present invention, and be not used in qualification the present invention a preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing.
Fig. 2 is that the 1X-DO carrier wave of avoiding that the embodiment of the invention provides changes the method flow diagram that call drop is switched in the frontier district mutually, and as shown in Figure 2, step comprises:
Step S201, change mutually between district and the non-mutual commentaries on classics of the carrier wave district isolated area is set being used for the professional carrier wave that changes mutually of 1X-DO.
, carrier wave increases a specific isolation strip outside changeing the district mutually; Being used to reduce the professional carrier frequency F2 of the carrying 1X in the non-mutual commentaries on classics of carrier wave district changes professional mutual of area carrier DO mutually for carrier wave and reprints the interference of F2 frequently, assists the 1X business to change the switching in district mutually to carrier wave from the non-mutual commentaries on classics of carrier wave district simultaneously.
Step S202, the borderline region when the terminal in the non-mutual commentaries on classics of said isolated area and carrier wave district make a call when setting up professional the connection, and whether the mutual reprinting frequency F2 institute loaded service that the said carrier wave of base station judges changes the district mutually converts the DO business into from the 1X business.
Step S203, change the district mutually when the base station judges carrier wave mutual reprinting frequently F2 institute loaded service convert DO into when professional from the 1X business, the base station indicating terminal carries out the carrier frequency handover operation, so that as much as possible its 1X business is based upon on non-mutual the reprintings frequency.
Step S204, change the district mutually when the base station judges carrier wave mutual reprinting frequently the F2 loaded service do not convert DO into when professional from the 1X business, the carrier frequency handover operation is carried out in base station not indicating terminal.
Change the district and the border in the non-mutual commentaries on classics of carrier wave district mutually at carrier wave, the 1X business will be based upon in non-mutual reprintings frequently as far as possible, is used to reduce the probability that changes switching frequently and also guarantees the load balancing between the non-mutual commentaries on classics district carrier frequency to greatest extent.
Further, change the district and the border in the non-mutual commentaries on classics of carrier wave district mutually at carrier wave, when the 1X business was based upon F2 and goes up, switching flow was frequently initiatively initiated to change in the base station, and indicating terminal switches to carrier wave to be changeed on the frequency of the carrying 1X business that district and the non-mutual commentaries on classics of carrier wave district have mutually.
Fig. 3 is the area dividing sketch map of the cdma network area of coverage that provides of the embodiment of the invention, and is as shown in Figure 3.
One, the division of borderline region
The cdma network area of coverage comprises that carrier wave changes A district, district, isolated area B district and C district, the non-mutual commentaries on classics of carrier wave district (normal area) mutually, promptly outside the A district, increases a B district.Said B is made up of a plurality of sub-districts in the district, in the middle of wanting can the A district be wrapped in isolates A district and C differentiation in the position of these sub-districts.
In the present embodiment, the A district has professional non-mutual mutual F2, the professional non-mutual reprinting frequency F3 of carrying DO frequently of reprinting that reprints frequency F1, carries 1X business or DO business of carrying 1X; The B district has F2, the professional F3 of carrying DO that carries the professional F1 of 1X, carries the 1X business; The C district has F2, the professional F3 of carrying DO that carries the professional F1 of 1X, carries the 1X business.
Further, the configuration in said B district must guarantee: dispose mutual at least one of reprinting frequently and being configured in mutual commentaries on classics district and carry the professional non-mutual reprinting of 1X frequently, be i.e. the F2 of present embodiment and F1.
Further, when the mutual reprinting F2 carrying frequently 1X in A district is professional, the carrier frequency F2 operate as normal in B district.In the mutual reprinting in A district when F2 institute loaded service converts DO into by 1X frequently, with the carrier frequency F2 shutoff in B district.
The area size in B district is relevant with the power sphere of action of the professional carrier frequency F2 of C area carrier 1X; For guaranteeing that A district does not receive the interference of the carrier frequency F2 in C district, when the power bracket of the carrier frequency F2 in C district influences than extensively the time, the scope in B district will increase; Otherwise the scope in B district can reduce.For example; The power influences scope of the carrier frequency F2 that the carrying 1X in C district is professional is 1 kilometer; If the mutual reprinting frequency F2 of the carrying DO in A district business is in this scope of 1 kilometer; Because frequency is consistent, the professional mutual reprinting frequency F2 of A area carrier DO will receive the power disturbance of the professional carrier frequency F2 of C area carrier 1X, causes calling out call drop.After increasing the B district between A district and the C district; When the mutual reprinting in A district frequently F2 carrying DO when professional; The carrier frequency F2 in B district is turn-offed simultaneously (pass have no progeny this carrier frequency be not have power); The coverage that needs only the B district has 1 kilometer, and the power of the carrier frequency F2 of C area carrier 1X business does not just affect the mutual DO business of reprinting F2 carrying frequently in A district so.
The existence in B district, the power that has reduced the professional carrier frequency F2 of the carrying 1X in C district is reprinted the influence of F2 frequently for professional mutual of the carrying DO in A district, mutual commentaries on classics district, simultaneously, can assist the carrier frequency F2 that carries the 1X business to switch to the A district from the C district.
Likewise; The power sphere of action that the area size in B district can also convert into according to the mutual reprinting frequency F2 in A district after the carrying DO business is confirmed, guarantees that the C district does not receive the interference of A district mutual reprinting frequency F2, influences wider if reprint the power bracket of frequency F2 mutually; Then the scope in B district will increase, otherwise reduce.
Two, the calling of borderline region inserts
After dividing the B district, the border in C district and B district, the 1X business will be based upon on the non-mutual reprinting frequency F1 as far as possible, is used to reduce and changes the probability that switches frequently, and guarantee the load balancing between the non-mutual commentaries on classics district carrier frequency to greatest extent.
For ease of explanation, below the intersection in use " borderline region " acute pyogenic infection of finger tip C district and B district belongs to the zone in C district, uses " border carrier frequency " acute pyogenic infection of finger tip C district and B district intersection to belong to the professional F2 of carrying 1X in C district.
In order to realize above-mentioned requirements, there are following three kinds of embodiments can reference.
Mode one: borderline region is initiated to change frequently in the sub-district and is switched.
1, the terminal makes a call and sets up professional the connection or once switching of terminal generation.
2, base station judges A district whether taken place to carry professional mutual reprintings of 1X frequently F2 convert the DO business of carrying into.
Whether if 3 A districts take place to change mutually, the base station judges terminal makes a call or whether the zone of switching is borderline region, and call out and be based upon on the carrier frequency F2 of border.
If the base station judges terminal makes a call or the zone of switching is a borderline region; And call setup is on the carrier frequency F2 of border; Then the base station indicating terminal is done to change frequently in current area and is switched, and switches on another carrier frequency under the sub-district, promptly switches on the non-mutual reprinting frequency F1.
If the base station judges terminal makes a call or the zone of switching is not a borderline region, and/or call out and be not based upon on the carrier frequency F2 of border, then the base station does not need special processing.
If 4 A districts do not take place to change mutually, then the base station does not need special processing.
Mode two: the overloading of borderline region load balancing frequently algorithm
1, the terminal makes a call at borderline region and sets up professional the connection.
2, base station judges A district whether taken place to carry professional mutual reprintings of 1X frequently F2 convert the DO business of carrying into.
If 3 A districts take place to change mutually, the final frequency of setting up is confirmed to call out based on " load control inserts thresholding " and " the load appointment thresholding " of border carrier frequency F2 in the base station.These two thresholdings can be configured in the BSS rank, also can be configured in cell level, and this load-threshold can be configured to power termination thresholding or number of users load-threshold according to real needs, and is as shown in Figure 4.
If a) the F1 load is less than " load control inserts thresholding " frequently in non-mutual reprinting, then call setup is on non-mutual reprinting frequency F1.
B) if the non-mutual load of reprinting frequency F1 is not less than " load control inserts thresholding "; Then in non-mutual load difference of reprinting F1 and border carrier frequency F2 frequently during less than " load appointment thresholding "; With call setup in non-mutual reprinting frequently on the F1; When non-mutual load difference of reprinting frequency F1 and border carrier frequency F2 is not less than " load appointment thresholding ", calling is assigned to border carrier frequency F2 goes up foundation.
C) F1 is above overload threshold frequently when non-mutual reprinting, as long as border carrier frequency F2 nonoverload, calling all is based upon on the carrier frequency F2 of border.
D) along with the non-mutual minimizing that F1 frequently goes up the user of reprinting, non-mutual reprintings be when F1 recovers from transship frequently, still based on a) and b) confirm the frequency of call setup.
If 4 A districts do not take place to change mutually, then the base station does not need special processing.
Mode three: borderline region does not carry the border carrier frequency in Overhead Message
1, base station judges A district whether taken place to carry professional mutual reprintings of 1X frequently F2 convert the DO business of carrying into.
If 2 A districts take place to change mutually, then channel list is upgraded in the base station, and border carrier frequency F2 is not included in the channel list, and the Overhead Message that the base station issues to the terminal does not carry border carrier frequency F2.At this moment, the terminal can standby on the frequency F2 of border, but when non-mutual reprintings frequently the F1 Load lifting or take place congested after, call out and still can be assigned to upward foundation of border carrier frequency F2.
3. if the A district does not take place to change mutually, then the base station does not need special processing.
Three, the switching of borderline region.
1, the terminal makes a call at borderline region and sets up professional the connection or once switching of terminal generation.
2, whether base station judges A district the professional carrier frequency F2 of 1X has taken place to carry has converted that to carry DO professional into.
If 3 A districts take place to change mutually, whether the current calling of base station judges is based upon on the carrier frequency F2 of border.
If judged result be call setup on the carrier frequency F2 of border, base station indicating terminal to report pilot measurement reports domain message then, and after receiving the pilot measurement reports domain message that reply at the terminal, judge whether current calling satisfies the condition frequently of changing.When satisfying when changing frequently condition, the base station switches to from border carrier frequency F2 and specifies on the carrier frequency through the existing handoff algorithms indicating terminal that changes frequently.When not satisfying switching condition, calling maintains on the current carrier frequency.
If judged result be call setup on non-border carrier frequency F1, then special processing is not done in the base station.
Said pilot measurement reports domain message is to define in the CDMA agreement; This message is carried the information and the neighboring BS information of current Active Set; Wherein, The pilot set that said current Active Set refers to current call setup with, the adjacent area of telling refers to the sub-district that calling possibly switch to, this intensity with the adjacent area that disposes and this adjacent area is relevant.
The said existing frequency handoff algorithms that changes comprises blind switching frequency and the auxiliary frequency that changes of travelling carriage.
Do not change mutually if carrier frequency takes place in 4 A districts, then the base station does not need special processing.
The present invention is based on existing network; Especially staggered on the life period between city 1x telephone traffic and DO telephone traffic; Be high, the high telephone traffic characteristics of DO amount of data traffic in evening of 1X voice telephone traffic amount on daytime, the mode of changing the space through the time is under existing frequency restrictive condition; Realize the lifting of DO data user's capacity and performance, thus additional income.The A district changes operation mutually and is to trigger with the professional operating time of DO by the 1X of the configuration on backstage is professional, and this operating time need be confirmed with the telephone traffic demand of reality.After generation " 1X carrier frequency F2 changes to the DO carrier frequency ", after promptly reprinting frequency F2 converted carrying DO business into from carrying 1X business mutually, it is professional that F2 just can only carry DO, up to the mutual commentaries on classics of generation once more.For example; Configuration 7:00～17:00 is the operating time of 1X carrier frequency, and 17:15～6:45 is the operating time of DO carrier frequency, so in the A district; " 1X carrier frequency F2 is to the conversion of DO carrier frequency " will take place in 17:00; The promptly mutual frequency F2 that reprints converts carrying DO business into from carrying the 1X business, and after the conversion, F2 can only carry the DO business; Arrived 6:45 " DO carrier frequency F2 is to the conversion of 1X carrier frequency " will take place, promptly mutual reprinting frequency F2 converts into from carrying DO business and carries the 1X business, and after the conversion, F2 can only carry the 1X business.The 1X carrier frequency F2 that changes the district when carrier wave mutually switches call drop for preventing the 1X business at the borderline region that carrier wave changes district and the non-mutual commentaries on classics of carrier wave district mutually after the conversion of DO carrier frequency, the 1X business is not based upon on the carrier frequency F2 as far as possible, changes the probability that switches frequently with minimizing.In case the 1X business is based upon on the carrier frequency F2, switching flow is frequently initiatively initiated to change in the base station, and indicating terminal switches to carrier wave to be changeed on other carrier frequency of the total carrying 1X business in district and the non-mutual commentaries on classics of carrier wave district mutually.
In sum, the present invention has following technique effect:
1, the present invention is based upon in the non-mutual reprinting frequently through the 1X business with borderline region, has solved the professional switching call drop problem of borderline region 1X.
2, the present invention change the district mutually at carrier wave mutual reprinting frequently institute's loaded service convert DO into when professional from the 1X business, through turn-offing the carrier frequency F2 of isolated area, avoided the power of the non-mutual commentaries on classics district F2 of carrier wave that carrier wave is changeed district's DO business that F2 carried mutually and caused interference.
Although preceding text specify the present invention, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention all are to be understood that to falling into protection scope of the present invention.
Claims (10)
1. avoid the 1X-DO carrier wave to change the method that call drop is switched in the frontier district mutually for one kind, it is characterized in that, comprising:
Change mutually between district and the non-mutual commentaries on classics of the carrier wave district isolated area is set being used for the professional carrier wave that changes mutually of 1X-DO;
Borderline region when the terminal in the non-mutual commentaries on classics of said isolated area and carrier wave district makes a call when setting up professional the connection, and whether the mutual reprinting frequency F2 institute loaded service that the said carrier wave of base station judges changes the district mutually converts the DO business into from the 1X business;
The mutual reprinting of changeing the district mutually when base station judges carrier wave F2 institute loaded service frequently converts DO into when professional from the 1X business, and the base station indicating terminal carries out the carrier frequency handover operation, so that as much as possible its 1X business is based upon on non-mutual the reprintings frequency;
The mutual reprinting of changeing the district mutually when base station judges carrier wave F2 loaded service does not frequently convert DO into when professional from the 1X business, and the carrier frequency handover operation is carried out in base station not indicating terminal.
2. method according to claim 1 is characterized in that said isolated area disposes carrier frequency F2.
3. method according to claim 2 is characterized in that, the mutual reprinting of changeing the district mutually when carrier wave F2 institute loaded service frequently converts DO into when professional from the 1X business, and the carrier frequency F2 of isolated area is turn-offed.
4. according to any described method of claim 1-3; It is characterized in that; The base station the terminal of confirming to be positioned at borderline region setting up on the carrier frequency F2 of border call out after; Judge that whether the terminal satisfy the condition frequently of changing, and satisfying when changing frequently condition that indicating terminal switches on professional non-mutual the reprintings frequency of the carrying 1X of appointment from border carrier frequency F2.
5. method according to claim 4 is characterized in that, the base station judges according to the pilot measurement reports domain message of terminal to report whether the terminal satisfies the condition frequently of changing.
6. according to any described method of claim 1-3, it is characterized in that, also comprise:
Thresholding, load appointment thresholding and overload threshold are inserted according to the load control of the border carrier frequency F2 of borderline region in the base station, confirm the frequency of terminal at the borderline region call setup.
7. method according to claim 6 is characterized in that, when the non-mutual load of reprinting frequency of borderline region inserted thresholding less than said load control, the base station was with the said non-mutual frequency of confirming as terminal call foundation frequently of reprinting.
8. method according to claim 6; It is characterized in that when borderline region non-mutual reprinted load frequently and be not less than said load control and insert thresholding, base station judges is said non-ly reprinted frequently whether assign thresholding less than load with the load difference of border carrier frequency F2 mutually; If judged result is assigned thresholding for the load difference less than load; Then the base station is confirmed as the frequency that terminal call is set up frequently with said non-mutual the reprinting, otherwise, said border carrier frequency F2 is confirmed as the frequency that terminal call is set up.
9. method according to claim 6 is characterized in that, when non-mutual reprinting surpasses overload threshold frequently, and during the carrier frequency F2 nonoverload of border, the frequency that terminal call is set up is confirmed as with said border carrier frequency F2 in the base station.
10. according to any described method of claim 1-3, it is characterized in that, also comprise:
The mutual reprinting of changeing the district mutually when carrier wave F2 institute loaded service frequently converts DO into when professional from the 1X business, and the Overhead Message that border carrier frequency F2 will not carried in the base station is issued to the terminal that is positioned at borderline region, make the terminal can standby on said border carrier frequency F2.
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| CN201210079378.6A CN102612105B (en) | 2012-03-23 | 2012-03-23 | A kind of method for avoiding 1X DO carrier waves from mutually turning frontier district switching call drop |
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| CN201210079378.6A CN102612105B (en) | 2012-03-23 | 2012-03-23 | A kind of method for avoiding 1X DO carrier waves from mutually turning frontier district switching call drop |
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| CN106658612A (en) * | 2015-11-03 | 2017-05-10 | 中兴通讯股份有限公司 | Frequency point switching method and apparatus thereof |
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| US20020067707A1 (en) * | 2000-12-04 | 2002-06-06 | Linda Morales | Method and apparatus to control handoff between different wireless systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106658612A (en) * | 2015-11-03 | 2017-05-10 | 中兴通讯股份有限公司 | Frequency point switching method and apparatus thereof |
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| CN106658612B (en) * | 2015-11-03 | 2020-12-22 | 中兴通讯股份有限公司 | Frequency point switching method and device |
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| CN102612105B (en) | 2018-01-09 |
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