CN102843737B - Idle handoff method for mobile communication devices in CDMA2000 1x network and terminal - Google Patents
Idle handoff method for mobile communication devices in CDMA2000 1x network and terminal Download PDFInfo
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- CN102843737B CN102843737B CN201110171825.6A CN201110171825A CN102843737B CN 102843737 B CN102843737 B CN 102843737B CN 201110171825 A CN201110171825 A CN 201110171825A CN 102843737 B CN102843737 B CN 102843737B
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Abstract
The invention discloses method and the terminal of idle switching in a kind of CDMA2000 1X system, the free time related in mobile network switches field, when the free time that the idle switching times of terminal in the unit interval is more than or equal to setting switch frequency threshold value and the pilot frequency intensity of high-rise large coverage cell is more than or equal to the Ec/Io thresholding of setting time, the idle switching times of terminal in the unit interval, from low layer cell merge to the large coverage cell of high level, resets by triggering terminal.Method disclosed by the invention and terminal can reduce the terminal of fast moving switching times, improve communication quality can network resource consumption be reduced.
Description
Technical field
The free time that the present invention relates in mobile network switches field, particularly relates to the idle handoff method for mobile communication devices in CDMA2000 1x network and terminal.
Background technology
In the layered coverage network of CDMA2000 1x, according to 3GPP2 standard, for the different layers community that overlap covers, distinguish by setting different User Zone (user area), and at Removable User Identity Module (the Removable User Identity Module of terminal, R-UIM), be in the UIM card used in CDMA mobile phone and store a preferred, users zone list (preferred User Zone List, PUZL), this list provides Over-the-Air Service Provisioning (OTASP) to upgrade by air traffic.Travelling carriage can reside in preferred User Zone in an idle state, when only occurring that pilot frequency intensity is greater than UZ_EXIT_IN_USEs than the pilot frequency intensity of current User Zone community in new User Zone community, just triggering terminal can switch in an idle state, reselect resident to new User Zone community.
The shortcoming of the User Zone reselecting method of CDMA20001x system is in the region covered in the large coverage cell of high level and the little area overlapping of low layer, Liang Zhong community adopts different User Zone respectively, for the ease of absorbing telephone traffic, usually using the User Zone of low layer community as preferred User Zone, in this case, for the terminal of fast moving, if preferably reside in the User Zone of low layer community, frequent switching can be produced, increase network resource consumption, switch between alien frequencies and communication quality also can be caused to decline.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of idle handoff method for mobile communication devices, can improve fast mobile terminals in CDMA20001X system layer overlay area and switch phenomenon frequently.
A kind of method of carrying out idle switching in CDMA20001X system, comprise: when the free time that the idle switching times of terminal in the unit interval is more than or equal to setting switch frequency threshold value and the pilot frequency intensity of high-rise large coverage cell is more than or equal to the Ec/Io thresholding of setting time, the idle switching times of terminal in the unit interval, from low layer cell merge to the large coverage cell of high level, resets by triggering terminal.
According to an embodiment of the inventive method, when the idle switching times of terminal in the unit interval is less than the free time switching frequency threshold value of described setting, if the pilot frequency intensity that the pilot frequency intensity of Target cell deducts current area is more than or equal to the pilot tone relative intensity thresholding of setting, then triggering terminal is switched on described Target cell.
According to an embodiment of the inventive method, in the free time switches, low layer community is set to preferred Target cell.
According to an embodiment of the inventive method, improve described pilot tone relative intensity thresholding, the probability of terminal to low layer cell merge can be reduced.
According to an embodiment of the inventive method, the large coverage cell of high level of repeating to cover has different user area User Zone respectively from low layer community; When there is the free time switching that User Zone changes, the idle switching times of terminal in the unit interval is reset; When the generation User Zone immovable free time switches, the idle switching times of terminal in the statistical unit time.
Method of the present invention is for arranging idle switching frequency threshold value and Ec/Io thresholding in end side, when the free time that the idle switching times of terminal in the unit interval is more than or equal to setting switch frequency threshold value and the pilot frequency intensity of high-rise large coverage cell is more than or equal to the Ec/Io thresholding of setting time, triggering terminal is switched on high-rise large coverage cell.
Another technical problem that the present invention will solve is to provide a kind of terminal used in CDMA2000 1X system, can improve in layered coverage region, switch phenomenon frequently during mobile terminal fast moving.
The terminal used in CDMA2000 1X system, comprising: switching times statistic unit, for the idle switching times of terminal in the statistical unit time; Switching judging unit, for judging whether that free time that the idle switching times of terminal in the unit interval is more than or equal to setting switches frequency threshold value and the pilot frequency intensity of high-rise large coverage cell is more than or equal to the User Zone community Ec/Io thresholding of setting, if so, then send terminal from low layer cell merge to the switching command the large coverage cell of high level; Switch unit, for receiving the switching command from being switched to described in switching judging unit on high-rise large coverage cell, by terminal from low layer cell merge to the large coverage cell of high level, and resets the idle switching times of terminal in the unit interval.
According to an embodiment of terminal of the present invention, when the idle switching times of terminal in the unit interval is less than described free time switching frequency threshold value, the pilot frequency intensity that the pilot frequency intensity of described switching judging unit judges whether Target cell deducts current area is more than or equal to the pilot tone relative intensity thresholding of setting, if so, then the switching command be switched on described Target cell is sent; Described switch unit, according to the described switching command be switched on described Target cell, switches described terminal on described Target cell.
According to an embodiment of terminal of the present invention, in the free time switches, low layer community is set to preferred Target cell by described terminal.
According to an embodiment of terminal of the present invention, described terminal improves the value of described pilot tone relative intensity thresholding, can reduce the probability of terminal to low layer cell merge.
According to an embodiment of terminal of the present invention, the large coverage cell of high level of repeating to cover has different user area User Zone respectively from low layer community; The idle switching times of terminal in the unit interval, when the free time making UserZone change switches, resets by described switch unit; Described switching times statistic unit occur the User Zone immovable free time switch time, the idle switching times of terminal in the statistical unit time.
Terminal of the present invention reaches desired value by the idle switching times of judging unit within the unit interval, and the pilot frequency intensity of target User Zone high-rise large coverage cell is when meeting communication threshold, then carry out free time switching gravity treatment User Zone community, make terminal switch on the large coverage cell of high level.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart according to an embodiment of carrying out the idle method switched in CDMA2000 1X system of the present invention;
Fig. 2 is the flow chart according to another embodiment of carrying out the idle method switched in CDMA2000 1X system of the present invention;
Fig. 3 is the schematic diagram of an embodiment according to terminal of the present invention;
Fig. 4 is the schematic diagram according to applying idle handoff method for mobile communication devices of the present invention under CDMA2000 1X layered coverage network environment.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Shortcoming is frequently switched in layered coverage area terminal fast moving in order to overcome, the idle switching times parameter Handoff_Cal of terminal and community Ec/Io threshold parameter UZ_OK in the end side setting unit time, UZ_OK parameter is for judging whether the communication quality of User Zone community meets the demands.
Below in conjunction with each figure and embodiment, many-sided description is carried out to technical scheme of the present invention.
Fig. 1 is the flow chart according to an embodiment of carrying out the idle method switched in CDMA2000 1X system of the present invention.CDMA2000 1X system arranges different User Zone to the large coverage cell of high level and low layer community; As shown in Figure 1,
Step 102: judge whether to meet Handoff_Cal >=Handoff_Cal_Target, parameter Handoff_Cal_Target switches frequency threshold value the free time of setting
Step 103: if be judged as in a step 102 meeting, then judge whether that the pilot frequency intensity meeting high-rise large coverage cell is more than or equal to UZ_OK further;
Step 104: if be judged as YES in step 103, then triggering terminal carries out free time switching, by terminal from low layer cell merge to the large coverage cell of high level, and Handoff_Cal parameter is reset.
Idle switching times within the unit interval reaches desired value, and the pilot frequency intensity of the high-rise large coverage cell of target User Zone meets communication threshold UZ_OK, then triggering terminal carries out free time switching gravity treatment User Zone community, be switched on high-rise large coverage cell, can switching times be reduced, improve communication quality.
Fig. 2 is the flow chart according to another embodiment of carrying out the idle method switched in CDMA2000 1X system of the present invention.As shown in Figure 2:
Step 202: judge whether to meet Handoff_Cal < Handoff_Cal_Target, parameter Handoff_Cal_Target switches frequency threshold value the free time of setting.
If be judged as meeting in 202 steps, then perform step 203: judge whether that the pilot frequency intensity meeting high-rise large coverage cell is more than or equal to UZ_OK further;
Step 204: if be judged as meeting in 203 steps, then triggering terminal carries out free time switching, makes terminal switch on the large coverage cell of high level, and Handoff_Cal parameter is reset;
If be judged as NO in 202 steps, then perform step 205: judge whether to meet New_UZ_Pilot-Current_UZ_Pilot >=UZ_EXIT_IN_USEs, wherein, New_UZ_Pilot is Target cell pilot frequency intensity, Current_UZ_Pilot is current cell pilot intensity, and UZ_EXIT_IN_USEs is pilot tone relative intensity thresholding.
If be judged as in step 205 meeting, then perform step 206: triggering terminal is switched on Target cell.
According to one embodiment of present invention, be switched on Target cell, comprise low layer cell merge to low layer community, low layer cell merge is to high-rise large coverage cell, high-rise large coverage cell is switched to low layer community, and high-rise large coverage cell is switched to high-rise large coverage cell; The large coverage cell of high level of repeating to cover in system is respectively equipped with different user area User Zone from low layer community; When the free time making User Zone change switches, the idle switching times of terminal in the unit interval is reset; When the generation User Zone immovable free time switches, the idle switching times of terminal in the statistical unit time.
According to one embodiment of present invention, for other situation, triggering terminal does not carry out free time switching gravity treatment User Zone community.In the free time switches, low layer community can be set to preferred Target cell.
According to one embodiment of present invention, by UZ_EXIT_IN_USEs optimum configurations is slightly high, improve handoff threshold, terminal is more easily remained on high-rise large coverage cell, reduces the probability of terminal toward low layer cell merge.
Fig. 3 is the schematic diagram of an embodiment according to terminal of the present invention.As shown in Figure 3, a kind of terminal 31, CDMA2000 1X system used in CDMA2000 1X system arranges different User Zone to the large coverage cell of high level and low layer community; The idle switching times parameter Handoff_Cal of terminal and community Ec/Io threshold parameter UZ_OK in the end side setting unit time, UZ_OK parameter is for judging whether User Zone cell communication quality meets the demands.
Terminal comprises judging unit 311, switch unit 312, switching times statistic unit 313, and switching times statistic unit 313 is for the idle switching times of terminal in the statistical unit time; Judging unit 311 is meeting Handoff_Cal >=Handoff_Cal_Target, and when the pilot frequency intensity of high-rise large coverage cell is more than or equal to UZ_OK, if so, then send terminal from low layer cell merge to the switching command the large coverage cell of high level; Switch unit 312 for receive from switching judging unit by terminal from low layer cell merge to the switching command the large coverage cell of high level, by terminal from low layer cell merge to the large coverage cell of high level, and the idle switching times of terminal in the unit interval is reset.
According to one embodiment of present invention, judging unit 311 is meeting Handoff_Cal < Handoff_Cal_Target, and when New_UZ_Pilot-Current_UZ_Pilot >=UZ_EXIT_IN_USEs, send the switching command be switched on Target cell; Wherein, New_UZ_Pilot is Target cell pilot frequency intensity, and Current_UZ_Pilot is current cell pilot intensity, and UZ_EXIT_IN_USEs is pilot tone relative intensity thresholding.
Switch unit 312, according to the switching command be switched on Target cell, switching terminal is on Target cell.
According to one embodiment of present invention, judging unit 311 gravity treatment User Zone community and trigger switch unit 312 carry out the free time switch, comprise low layer cell merge to low layer community, low layer cell merge is to high-rise large coverage cell, high-rise large coverage cell is switched to low layer community, and high-rise large coverage cell is switched to high-rise large coverage cell; There is different user area User Zone the large coverage cell of high level of repeating to cover respectively from low layer community; When there is the free time switching that User Zone changes, the idle switching times of terminal in the unit interval resets by switch unit 312; When the generation User Zone immovable free time switches, the idle switching times of terminal in the switching times statistic unit 313 statistical unit time.
According to one embodiment of present invention, for other situation, judging unit 311 not gravity treatment User Zone community, and do not trigger switch unit 312 carry out the free time switch.
According to one embodiment of present invention, in the free time switches, low layer community is set to preferred Target cell by terminal 31.
According to one embodiment of present invention, terminal 31, by UZ_EXIT_IN_USEs optimum configurations is slightly high, improves handoff threshold, makes terminal 31 more easily remain on high-rise large coverage cell, reduces the probability toward low layer cell merge.
According to one embodiment of present invention, terminal 31 can comprise mobile phone, PDA, notebook etc.
Fig. 4 is the schematic diagram according to applying idle handoff method for mobile communication devices of the present invention under CDMA2000 1X layered coverage network environment.In CDMA2000 1x system, high-rise large coverage cell 402 is overlapping with low layer community 403 covers, and this Liang Zhong community adopts different User Zone respectively, if high level greatly coverage cell 402 be User Zone 1, low layer community 403 is User Zone 2.For the ease of absorb telephone traffic, usually using the User Zone 2 of low layer community 403 as preferred User Zone.For terminal 401, if moved at a slow speed, then preferentially reside on the User Zone low layer community 403 of high priority, thus ensure that 403 pairs, low layer community telephone traffic absorbs.If terminal 401 fast moving, such as on a highway or on train, terminal 401 can switch the frequency according to the free time and reach desired value, and when the pilot frequency intensity of the high-rise large coverage cell 402 of target User Zone meets communication threshold UZ_OK, then carry out free time switching gravity treatment User Zone community, make terminal switch on the large coverage cell 402 of high level, fast mobile terminals switching times can be reduced, improve communication quality and reduce network resource consumption.
Claims (4)
1. in CDMA2000 1X system, carry out the idle method switched, it is characterized in that, comprising:
The free time being more than or equal to setting when the idle switching times of terminal in the unit interval switches frequency threshold value, and the pilot frequency intensity of high-rise large coverage cell is when being more than or equal to the Ec/Io thresholding of setting, the idle switching times of terminal in the unit interval, from low layer cell merge to the large coverage cell of high level, resets by triggering terminal;
When the idle switching times of terminal in the unit interval is less than the free time switching frequency threshold value of described setting, if the pilot frequency intensity that the pilot frequency intensity of Target cell deducts current area is more than or equal to the pilot tone relative intensity thresholding of setting, then triggering terminal is switched on described Target cell;
Wherein, in the free time switches, low layer community is set to preferable cell; The large coverage cell of high level of repeating to cover has different User Zone respectively from low layer community; When there is the free time switching that UserZone changes, the idle switching times of terminal in the unit interval is reset; When the generation User Zone immovable free time switches, the idle switching times of terminal in the statistical unit time.
2. the method for claim 1, is characterized in that: improve described pilot tone relative intensity thresholding.
3. the terminal used in CDMA2000 1X system, is characterized in that, described terminal comprises:
Switching times statistic unit, for the idle switching times of terminal in the statistical unit time;
Switching judging unit, for judging whether that free time that the idle switching times of terminal in the unit interval is more than or equal to setting switches frequency threshold value and the pilot frequency intensity of high-rise large coverage cell is more than or equal to the Ec/Io thresholding of setting, if so, then send terminal from low layer cell merge to the switching command the large coverage cell of high level to switch unit;
Switch unit, for receiving terminal from switching judging unit described from low layer cell merge to the switching command the large coverage cell of high level, by terminal from low layer cell merge to the large coverage cell of high level, and the idle switching times of terminal in the unit interval is reset;
Wherein, when the idle switching times of terminal in the unit interval is less than described free time switching frequency threshold value, whether the pilot frequency intensity that the pilot frequency intensity of described switching judging unit judges Target cell deducts current area is more than or equal to the pilot tone relative intensity thresholding of setting, if so, then send to described switch unit the switching command be switched on described Target cell;
Described switch unit according to described in be switched to switching command on described Target cell, switch described terminal on described Target cell;
Wherein, in the free time switches, low layer community is set to preferable cell by described terminal; The large coverage cell of high level of repeating to cover has different user area UserZone respectively from low layer community; The idle switching times of terminal in the unit interval, when there is the free time switching that User Zone changes, resets by described switch unit; Described switching times statistic unit occur the User Zone immovable free time switch time, the idle switching times of terminal in the statistical unit time.
4. terminal as claimed in claim 3, is characterized in that: described terminal improves the value of described pilot tone relative intensity thresholding.
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