CN100364359C - CDMA system terminal switching method - Google Patents
CDMA system terminal switching method Download PDFInfo
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- CN100364359C CN100364359C CNB2004100790800A CN200410079080A CN100364359C CN 100364359 C CN100364359 C CN 100364359C CN B2004100790800 A CNB2004100790800 A CN B2004100790800A CN 200410079080 A CN200410079080 A CN 200410079080A CN 100364359 C CN100364359 C CN 100364359C
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Abstract
The present invention relates to the field of data communication, which discloses an exchange method for active state terminals of data services, and the present invention solves the problem that the active state terminal can not independently exchange to an EVDO system. The method comprises the following steps: when a base station controller (BSC) judge that the BSC enters a mixing overlay area of a CDMA 1X system and a CDMA EVDO system from a pure CDMA 1X system according to measurement messages reported by the service active state terminal, if the overlay area is a dual-mode terminal, the BSC interrupts the current service of the terminal and releases an air interface of the terminal. The terminal can reestablish connection in the CDMA EVDO system and can continuously carry out the current service. Furthermore, the BSC can directly release the air interface without judging the dual-mode terminal; if the terminal does not support the CDMA EVDO system, the terminal can reconnect with the CDMA 1X system without service interruption.
Description
Technical field
The present invention relates to the handoff technique of data communication field, be particularly related to CDMA 1X (CodeDevision Multiple Access 1X, the code division multiple access single-carrier system) data service activated state terminal, from pure CDMA 1X system coverage area to CDMA 1X system and CDMA EVDO (CDMAEVolution to packet Data Optimized, when CDMA data system) overlay area is mixed by system, how to switch to the method for CDMA EVDO system.
Background technology
Adopting CDMA (Code Devision Multiple Access, code division multiple access) in the mobile communication network of standard, CDMA EVDO is a pure data communication system, and at wireless communication field, CDMAEVDO transmits the cost of every megabit data far below CDMA 1X system.CDMA EVDO system is positioned as the stacking network of CDMA 1X at present, promptly adopt CDMA EVDO and CDMA 1X stack to cover at hot zones, the border district adopts CDMA 1X to finish wide covering, realizes a seamless wireless data network, adopts dual-mode terminal to switch between two nets automatically.Because the low-cost of CDMA EVDO should make data service operate in the CDMA EVDO system as far as possible, could improve the availability of frequency spectrum of system, reduce customer investment, this also is used as a principle, implements in the design of dual-mode terminal.
What yet dual-mode terminal can success finishes the switching of CDMA EVDO and CDMA 1X at dormant state, and when CDMA EVDO state of activation, when entering pure CDMA 1X overlay area (that is: CDMA EVDO system does not have the zone that covers in the CDMA 1X overlay area) by CDMA EVDO and CDMA 1X mixing overlay area, switching from CDMA EVDO system to CDMA 1X system, but, when the user enters CDMA 1X with CDMA EVDO mixing overlay area by pure CDMA 1X overlay area, because the activated state dual-mode terminal can't be searched for CDMA EVDO frequency, so can't automatically switch to CDMA EVDO system, can only continue enterprising line data transmission, waste valuable frequency spectrum resource at CDMA 1X.
Prior art can't realize the switching of CDMA 1X activated state to CDMA EVDO, thereby at the mix area of coverage of CDMA 1X with CDMA EVDO, terminal still continuous firing makes the user can't enjoy high-rate wireless communication under CDMA 1X pattern, has wasted valuable CDMA 1X carrier frequency resource simultaneously.
Summary of the invention
The present invention is exactly in order to solve terminal by CDMA 1X activated state the time, when the pure CDMA 1X area of coverage enters CDMA 1X with the CDMAEVDO mixing area of coverage, can not switch to the problem of CDMA EVDO system, provides two kinds of changing methods, through the following steps realization.
A kind of CDMA system terminal switching method, as BSC (Base Station Controller, when base station controller) receiving the measurement message of data service activated state terminal, carry out the following step: confirm that terminal enters CDMA 1X system from pure CDMA 1X system coverage area and mixes the overlay area with CDMA EVDO system; Confirm that this terminal is a dual-mode terminal, described dual-mode terminal is supported CDMA 1X system and CDMA EVDO system simultaneously; Interrupt the current business of this terminal and discharge the air interface of this terminal, make this terminal searching CDMA EVDO system's frequency and connect, proceed described current business.
Another kind of CDMA system terminal switching method, when BSC receives the measurement message of data service activated state terminal, carry out the following step: confirm that this terminal enters into CDMA 1X system from pure CDMA 1X system coverage area and mixes the overlay area with CDMA EVDO system; Interrupt the current business of described terminal and discharge this terminal air interface, make this terminal initiate initialization request again, and select to carry out following operation: if this terminal of a is only supported CDMA 1X system, then this terminal call CDMA 1X system and rebulid connection proceeds described current business; If this terminal of b is supported CDMA1X system and CDMA EVDO system simultaneously, then this terminal is proceeded described current business in CDMA EVDO system registry and connect.
The difference of above-mentioned two methods is: after BSC receives the measurement message of activated state terminal, whether carry out the differentiation of terminal pattern earlier, and then the switching of being correlated with.Described method can preestablish following tabulation as required: dual-mode terminal tabulation, the tabulation of pure CDMA 1X system coverage area edge and Zone switched tabulation, and to make things convenient for the BSC inquiry.
Be the effect that guarantees to switch, Zone switched tabulation can also further be set, described Zone switched be that CDMA 1X system is mixed in the overlay area with CDMA EVDO system, CDMA EVDO pilot signal is higher than the zone of a threshold value of setting, switches when Zone switched when terminal enters this again.
When setting different zone lists, each zone be masked as the pilot frequency sequence sign indicating number in each zone or the identifier of sector, the BSC pilot signal that measurements reports according to terminal judgement residing zones of different of terminal and change in location situation.
Use the method for the invention, realized of the switching of CDMA 1X data service activated state terminal, improved CDMA EVDO data service utilance to CDMAEVDO.
Description of drawings
Fig. 1 is the switching flow schematic diagram.
Embodiment
CDMA 1X networking coverage is greater than CDMA EVDO networking, CDMA EVDO system is by the BSC control of CDMA EVDO, its overlay area of BTS determining positions of CDMA EVDO, whole system is referred to as AN (Access Network, Access Network), can build with BSC and the BTS unification of CDMA 1X, also can be by different equipment constructions.
The main cause that terminal can not be switched be since CDMA 1X when activated state, enter when mixing the area of coverage from the pure CDMA 1X area of coverage the user, terminal can't be searched for CDMA EVDO frequency simultaneously, also just can't switch to CDMA EVDO system, if but according to its information that reports, pilot frequency intensity for example allows be in the of short duration dormant state that enters of user under the state of activation, terminal can heavily be searched for CDMA EVDO carrier frequency, carries out thereby data service transferred in the CDMAEVDO system.
As shown in Figure 1, be the switching flow schematic diagram, concrete switch step is as follows:
When 1, BSC receives the measurement message of activated state terminal to report, judge that according to measuring message this terminal is to enter into from pure CDMA 1X network system overlay area when Zone switched, further the tabulation of inquiry dual-mode terminal confirms whether this terminal is dual-mode terminal, if dual-mode terminal just begins next step immediately it is switched CDMA EVDO system; If not, keep the state of this terminal.
Each terminal is in wireless environment variation, need increase, when deleting soft handover branches, will reporting measurement reports, if requiring the branch of deletion is pure CDMA 1X area of coverage pilot tone, simultaneously, when all activated collection pilot tone is CDMA 1X with CDMA EVDO mixing area of coverage pilot tone, illustrate that this terminal enters into the mixing area of coverage by the pure CDMA 1X area of coverage, if at this moment terminal is in the data service state of activation,, need this terminal to be switched to CDMA EVDO system for optimizing allocation of resources.
BSC judges when terminal location changes, the method of most convenient is the tabulation of edge, setting area, each zone be masked as each the zone in pilot frequency sequence sign indicating number or the identifier of sector, when BSC receives the pilot signal of terminal to report, only need this edge tabulation of inquiry just can determine the position and the situation of change thereof of terminal.The edges of regions tabulation can be set when systems organization and finish in the inner realization of BSC.Based on the edges of regions tabulation, auxiliary switch area can further be set to avoid frequent switching.For example, to assist the Zone switched CDMA of being positioned at EVDO to cover better area, rather than real covering fringe region, this regional pilot signal is higher than a threshold value of setting, when switching, the terminal that is switched is not the edge that is positioned at the area of coverage like this, but be positioned at the edge mix coverage cell the centre or, carry out when interrupting, the sub-district that requires all soft handovers in the terminal Active Set all is the sub-district of mixing in the area of coverage.When concrete execution is switched, just introduce an amount of hysteresis like this, the generation of having avoided table tennis to switch has guaranteed service quality.
Dual-mode terminal be a kind of can be simultaneously in the terminal of CDMA 1X and CDMA EVDO system works, BSC confirms the identity of dual-mode terminal by the dual-mode terminal tabulation, in fact dual-mode terminal tabulation is exactly the user that operator is served by CDMA 1X and CDMA EVDO when providing, IMSI (International Mobile Subscriber Identity, IMSI International Mobile Subscriber Identity) with the user distinguishes different dual-mode terminals.
2, BSC interrupts the ongoing data service of this terminal and discharges the air interface of this terminal.
3, because air interface discharges, this terminal is initiated the initialization flow process immediately.At first search the CDMA1X system,, do not operate, search CDMA EVDO system then, carry out register flow path owing to register.
4, owing to also have data to need transmission, according to termination property, when having CDMA 1X and CDMA EVDO system at the same time, flow process connects in CDMA EVDO system.
5, terminal is finished switching in the enterprising line data transmission of CDMA EVDO system.
This is a method that realizes on CDMA 1X.The execution of said method depends on following tabulation and realizes: edge, overlay area tabulation (perhaps auxiliary Zone switched tabulation) mixes in dual-mode terminal tabulation and edges of regions tabulation, pure CDMA 1X system coverage area and CDMA 1X system with CDMA EVDO system.The edges of regions tabulation is the boundary definition of the pure CDMA 1X border and the mixed area of coverage, can adopt the sector label symbol as boundary marker, when being provided with, system can determine, and all sector label symbols are made tabular form inquire about with convenient, also all can be divided into two classes for a short time, pure CDMA 1X sub-district with mix coverage cell, if terminal progressively switches to be and mixes coverage cell and also can think to enter the mixing area of coverage by the 1X area of coverage by being pure CDMA 1X sub-district in the Active Set like this, BSC can judge the change in location of terminal by the pilot signal of terminal to report.
Like this, in the BSC of CDMA 1X side, keep dual-mode terminal tabulation and pure CDMA 1X overlay area and mix tabulation of edge, overlay area or auxiliary Zone switched tabulation, when being confirmed to be certain dual-mode terminal according to tabulation, BSC entered mixed zone or auxiliary when Zone switched, just initiatively initiating air interface by BSC discharges, then dual-mode terminal can be searched for frequency again, after finding CDMA EVDO frequency, on core net, switch, data service transferred on the CDMA EVDO proceed, thereby finish of the switching of CDMA1X activated state to CDMA EVDO.
But the dual-mode terminal tabulation is not necessary, and the dual-mode terminal tabulation is owing to relate to and operator, and terminal manufacturer's reason needs 3GPP2 or operator to support.Even without this tabulation, this method also can be used, be the professional short interruption of pure CDMA 1X terminal data after, in CDMA 1X system, make a call again, proceed described data service, carry out transfer of data.If dual-mode terminal, characteristic based on terminal, this terminal is initiated register requirement after searching CDMA EVDO system frequency, its register requirement of CDMAEVDO system responses is also set up data for it and is connected, proceed previous data service, so just carry out the switching of dual-mode terminal, and after switching, improved the transmission rate of data service.
Though two above-mentioned methods when carrying out, can cause the data service of short time to interrupt, be based on data service for interrupting also insensitive characteristics, this method is feasible in practice.And if dual-mode terminal tabulation row are formulated into standard, use this method and the dual system of CDMA 1X and CDMAEVDO can also be waited for paging and become single system and wait for, improved the stand-by time of terminal.
Claims (11)
1. a CDMA system terminal switching method is characterized in that, when code division multiple access single-carrier system base station controller is received the measurement message of data service activated state terminal, carries out the following step:
The affirmation terminal divides multiple access single-carrier system overlay area to enter code division multiple access single-carrier system and CDMA data system mixing overlay area from pure code;
Confirm that this terminal is a dual-mode terminal, described dual-mode terminal is supported code division multiple access single-carrier system and CDMA data system simultaneously;
Interrupt the current business of this terminal and discharge the air interface of this terminal, make this terminal searching CDMA data system frequency and connect, proceed described current business.
2. the method for claim 1 is characterized in that, also is included in the step that the dual-mode terminal tabulation is set in the base station controller, and described dual-mode terminal is for supporting the terminal of code division multiple access single-carrier system and CDMA data system simultaneously.
3. the method for claim 1, it is characterized in that, also be included in the step that pure code divides edge, multiple access single-carrier system overlay area tabulation and code division multiple access single-carrier system and edge, CDMA data system mixing overlay area to tabulate is set in the base station controller.
4. method as claimed in claim 3, it is characterized in that, also be included in the step that Zone switched tabulation is set in the base station controller, described Zone switched be the code division multiple access single-carrier system with CDMA data system mixing overlay area in, the pilot signal of CDMA data system is higher than the zone of setting threshold value, switches when Zone switched when terminal enters this again.
5. as claim 3 or 4 described methods, it is characterized in that, with the edges of regions tabulation serves as that the basis determines that pure code divides the tabulation of edge, multiple access single-carrier system overlay area, code division multiple access single-carrier system and tabulation of edge, CDMA data system mixing overlay area and Zone switched tabulation, described edges of regions tabulation is the boundary definition of the pure CDMA 1X border and the mixed area of coverage, distinguishes zones of different with the identifier of pilot frequency sequence sign indicating number in each zone or sector.
6. method as claimed in claim 5 is characterized in that, base station controller is judged the residing zones of different of terminal according to the pilot signal in the measurement message of terminal to report.
7. a CDMA system terminal switching method is characterized in that, when code division multiple access single-carrier system base station controller is received the measurement message of data service activated state terminal, carries out the following step:
Confirm that this terminal divides multiple access single-carrier system overlay area to enter code division multiple access single-carrier system and CDMA data system mixing overlay area from pure code;
Interrupt the current business of described terminal and discharge this terminal air interface, make this terminal initiate initialization request again, and select to carry out following operation:
If this terminal of a is only supported the code division multiple access single-carrier system, then this terminal call code division multiple access single-carrier system and rebulid connection is proceeded described current business;
If this terminal of b is supported code division multiple access single-carrier system and CDMA data system simultaneously, then this terminal is proceeded described current business in CDMA data system registration and connect.
8. method as claimed in claim 7, it is characterized in that, also comprise being listed in down the step that pure code divides the tabulation of edge, multiple access single-carrier system overlay area and code division multiple access single-carrier system and edge, CDMA data system mixing overlay area to tabulate is set in the base station controller.
9. method as claimed in claim 8, it is characterized in that, also be included in the step that Zone switched tabulation is set in the base station controller, described Zone switched be the code division multiple access single-carrier system with CDMA data system mixing overlay area in, code division multiple access data pilot signal is higher than the zone of setting threshold value, switches when Zone switched when terminal enters this again.
10. method as claimed in claim 9, it is characterized in that, with the edges of regions tabulation serves as that the basis determines that pure code divides the tabulation of edge, multiple access single-carrier system overlay area, code division multiple access single-carrier system and tabulation of edge, CDMA data system mixing overlay area and Zone switched tabulation, described edges of regions tabulation is the boundary definition of the pure CDMA 1X border and the mixed area of coverage, distinguishes zones of different with the identifier of pilot frequency sequence sign indicating number in each zone or sector.
11. method as claimed in claim 10 is characterized in that, base station controller is judged the residing zones of different of terminal according to the pilot signal in the measurement message of terminal to report.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100790800A CN100364359C (en) | 2004-09-29 | 2004-09-29 | CDMA system terminal switching method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100790800A CN100364359C (en) | 2004-09-29 | 2004-09-29 | CDMA system terminal switching method |
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| CN1756419A CN1756419A (en) | 2006-04-05 |
| CN100364359C true CN100364359C (en) | 2008-01-23 |
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| CNB2004100790800A Expired - Fee Related CN100364359C (en) | 2004-09-29 | 2004-09-29 | CDMA system terminal switching method |
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Cited By (1)
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| WO2012083758A1 (en) * | 2010-12-23 | 2012-06-28 | 华为技术有限公司 | Method for guiding terminal residence and access network device |
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| CN100372235C (en) * | 2006-05-16 | 2008-02-27 | 南京邮电大学 | Code division multiple access and time division multiple access single-frequency point sharing device |
| CN100456891C (en) * | 2006-07-19 | 2009-01-28 | 华为技术有限公司 | Method for carrying out switching on activated state access terminal |
| CN101207874B (en) * | 2006-12-18 | 2010-11-24 | 启碁科技股份有限公司 | Stand-by communication device simultaneous for code division multiple access and global mobile communication system |
| CN101272611B (en) * | 2007-03-23 | 2012-12-19 | 华为技术有限公司 | Method and subscriber terminal for controlling service receiving |
| CN101431743A (en) | 2007-11-07 | 2009-05-13 | 华为技术有限公司 | Method, equipment and system for distinguishing different operators in the same network |
| US9119119B2 (en) * | 2008-10-31 | 2015-08-25 | Qualcomm Incorporated | 1×RTT and HRPD neighbor list support over LTE |
| CN102065504B (en) * | 2008-12-12 | 2013-08-07 | 华为技术有限公司 | Processing method of data traffic link, device and communication system |
| CN101730193B (en) * | 2009-06-09 | 2012-06-13 | 中兴通讯股份有限公司 | Method and system for selecting gateway node |
| CN102572981A (en) * | 2010-12-07 | 2012-07-11 | 中国电信股份有限公司 | Network switching method and network switching system |
| CN102307375B (en) * | 2011-09-06 | 2020-05-19 | 中兴通讯股份有限公司 | Switching method and system between different networks and eHRPD network |
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| CN1756419A (en) | 2006-04-05 |
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