CN100407832C - Method for supporting terminal to realize interacting between communication systems - Google Patents
Method for supporting terminal to realize interacting between communication systems Download PDFInfo
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- CN100407832C CN100407832C CN2005100829063A CN200510082906A CN100407832C CN 100407832 C CN100407832 C CN 100407832C CN 2005100829063 A CN2005100829063 A CN 2005100829063A CN 200510082906 A CN200510082906 A CN 200510082906A CN 100407832 C CN100407832 C CN 100407832C
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Abstract
The present invention discloses a method for supporting terminals to realize interoperability among communication systems. The method comprises: the neighborhood zone information and district reselection algorithm parameters of a CDMA (code division multiple access) system are written in a terminal in advance; under the condition that the terminal doesn't find information and parameter configured by a GSM (Global System for Mobile communication) system, the terminal searches districts by utilizing the relevant neighborhood zone information written in the terminal and judges whether a district suitable for the terminal to reside in exits or not according to the district reselection algorithm parameters so as to implement a district reselection function. The method can enable a running GSM network to realize the district reselection function from the GSM system to the CDMA system needless of upgrade and configuring the neighborhood zone information of the CDMA system; the influence to the existing networks due to the update and data configuration to the GSM system is avoided, and the aim to expand the coverage of a CDMA network by relying on the GSM system is realized.
Description
Technical field
The present invention relates to mobile communication technology, relate in particular to the sub-district gravity treatment between code division multiple access (CDMA, Code DivisionMultiple Access) and global system for mobile communications (GSM, Global System for Mobilecommunications).
Background technology
In the mobile communication system, the 3G system is with respect to the 2G system, and its availability of frequency spectrum is higher, simultaneously can provide abundanter, more personalized business, and therefore, the 3G system replaces the 2G system trend that is inevitable.But, be that the 2G network of representative is through years of development with build and reached higher coverage rate with the gsm system, at the 3G network first stage of construction, Wideband Code Division Multiple Access (WCDMA) (WCDMA for example, Wideband Code Division Multiple Access) system, its coverage effect is difficult to reach the covering level of GSM network, the WCDMA network coverage less than the place still need to utilize the GSM network to come for WCDMA user provides service, to keep professional continuity demand; In addition, the user who inserts the GSM network only can enjoy the function that gsm system provides, can't enjoy the peculiar service of 3G network, as video telephone, video conferencing, high data rate etc., so also need when the user initiates these requests, can realize sub-district gravity treatment, make the user insert the WCDMA network, enjoy the special service that the WCDMA network provides from the GSM network to the WCDMA network.This just relates to the problem of interoperability between WCDMA system and the gsm system.
For the interoperability that will carry out between WCDMA system and the gsm system, a basic premise is the dual-mode terminal that terminal will adopt industrywide standard.So-called dual-mode terminal is meant the terminal that can support two kinds of network communications technologys simultaneously, be meant the terminal that to support GSM and two kinds of network communications technologys of WCDMA simultaneously here, the network that it can more can play a role according to the needs selection of environment or practical operation.
Interoperability between gsm system and WCDMA system comprises switching between the system and the sub-district gravity treatment between the system.Wherein, switching from the WCDMA system to gsm system and sub-district gravity treatment, agreement according to 3GPP, (the Mobile Switching Center of mobile switching centre that needs the WCDMA system, hereinafter to be referred as MSC) fill in Cell Identifier (Serving) cell to realize switching with the discernible form of gsm system network side from the WCDMA system to gsm system, simultaneously also need be at radio network controller (the Radio Network Controller of WCDMA system, hereinafter to be referred as RNC) middle configuration gsm system adjacent cells information and relevant sub-district reselection algorithm parameter, the parameter of these configurations is handed down to terminal by the WCDMA system broadcasts, it is resident that terminal judges that according to above-mentioned parameter whether the sub-district is fit to, in the sub-district gravity treatment that is fit to carry out under the resident situation from the WCDMA system to gsm system.
Switching and sub-district gravity treatment from gsm system to the WCDMA system are then more complex.In order to support switching and sub-district gravity treatment from gsm system to the WCDMA system, the neighboring BS information that needs gsm system configuration WCDMA system, neighboring BS information comprises country number, network No., RNC numbering, cell number, cell scrambling, subdistrict frequency point numbering, transmit diversity indication etc., wherein the most important thing is the subdistrict frequency point numbering, frequency point information just, other neighboring BS information can obtain from main search by terminal.If gsm system designs according to 3GPP Release98 version, gsm system must be to base station system (Base Station System so, hereinafter to be referred as BSS) and internet exchange system (NetworkSwitching System, hereinafter to be referred as NSS) equipment of side upgrades, make them support the 3GPPRelease99 agreement, to support gsm system by Broadcast Control Channel (Broadcast ControlChannel, hereinafter to be referred as BCCH) issue neighboring BS information and relevant parameter, in addition, also need to dispose sub-district reselection algorithm parameter from gsm system to the WCDMA system, as Qsearch_I (triggering the gsm system signal minimum level value that the WCDMA system cell is measured), FDD_Qmin (the level minimum requirements of WCDMA system candidate cell), FDD_Qoffset (level difference value of WCDMA system candidate cell and current gsm system sub-district requires), according to agreement, these algorithm parameters are to come accessory terminal to judge whether suitable terminal is resident in the sub-district according to C1 and C2 criterion.Like this, terminal is search network information after start, receives gsm system by neighboring BS information and sub-district reselection algorithm parameter that BCCH issues, and it is resident to judge whether the sub-district is fit to terminal, thereby realize switching or sub-district gravity treatment from gsm system to the WCDMA system.
As seen, realize the interoperability between WCDMA system and the gsm system for support terminal and need carry out some configurations and upgrading network, for the WCDMA system, owing to be newly-built system, can dispose the neighboring BS information of gsm system easily, and gsm system is the network of runing, upgrading and configuration data are very big to the influence of existing network, cause two systems to be difficult to effective cooperation easily, do not reach with gsm system and replenish the purpose that the WCDMA system covers.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of support terminal to realize the method for interacting between communication systems, do not need the GSM existing network upgraded and the situation of adjacent area data configuration under, realize the sub-district gravity treatment from the gsm system to the cdma system, thus the interoperability between the realization system.
In order to achieve the above object, technical scheme of the present invention is achieved in that
A kind of support terminal is realized the method for interacting between communication systems, writes the frequency point information and the sub-district reselection algorithm parameter of CDMA systems in advance in terminal, and described method comprises the steps: at least
A. starting up of terminal search network, the network signal intensity that searches the global system for mobile communications gsm system is enough to support terminal and inserts the GSM network, and then terminal inserts the GSM network;
B. whether terminal judges searches the frequency point information and the sub-district reselection algorithm parameter of the adjacent area of the cdma system that gsm system issues by BCCH channel of broadcast control;
If c. terminal does not search the frequency point information and the sub-district reselection algorithm parameter of the adjacent area of cdma system, the frequency point information of the adjacent area of the cdma system that writes of inquiry terminal itself then, the search related cell judges according to the sub-district reselection algorithm parameter that terminal itself writes whether suitable terminal is resident in the sub-district;
D. when having the suitable terminal in sub-district resident, terminal is carried out the sub-district reselection operation from the gsm system to the cdma system.
The neighboring BS information of described cdma system and sub-district reselection algorithm parameter can write other memory cell of subscriber identification module (SIM/USIM, Subscriber Identification Module/Universal Identification Module) or terminal.
This method further comprises: the network signal intensity that starting up of terminal searches cdma system is enough to support terminal access cdma network, then terminal inserts cdma network, neighboring BS information and sub-district reselection algorithm parameter according to the gsm system of cdma system configuration, it is resident to judge whether the sub-district is fit to terminal, when suitable terminal is resident, carry out the sub-district reselection operation from the cdma system to the gsm system.
Further comprising between described step a and the b: terminal is initiated after the 3G service request or terminal detects the decay of GSM network signal.
Described 3G business comprises the combination in any of video telephone, video conferencing or high-speed data service or aforementioned business at least.
Described step c further comprises: if terminal searching is to the frequency point information and the sub-district reselection algorithm parameter of the adjacent area of the cdma system of gsm system configuration, then search for corresponding sub-district according to the frequency point information of the adjacent area of cdma system, it is resident that the sub-district reselection algorithm parameter that issues by BCCH channel of broadcast control according to gsm system judges whether the sub-district is fit to terminal.
Described cdma system is a wideband CDMA system, and in the cdma system often a frequency just can realize the continuous covering of a plurality of sub-districts, for other neighboring BS information, terminal can be obtained by automatic search network.
Described sub-district reselection algorithm parameter comprises that at least gsm system signal minimum level value Qsearch_I, the level minimum requirements FDD_Qmin of cdma system candidate cell of triggering cdma system cell measurement and the level difference value of CDMA candidate cell and current gsm system sub-district require FDD_Qoffset.
For the interoperability that will carry out between gsm system and the cdma system, different frequency point information and sub-district reselection algorithm parameter can be made as several groups of fixing values respectively, write terminal, terminal is when search, inquire about frequency point information successively, search frequency point information corresponding district, and it is resident to have judged whether that according to the corresponding algorithm parameter proper cell is fit to terminal, terminal and then finish sub-district gravity treatment between system.
From above scheme as can be seen, the method for interoperability between a kind of support terminal realization provided by the present invention system has following effect:
At first, the present invention writes terminal with the neighboring BS information and the sub-district reselection algorithm parameter of cdma system, make the GSM network runing not need to upgrade and dispose the sub-district reselection functionality that just can realize under the situation of neighboring BS information of cdma system from the gsm system to the cdma system, avoided gsm system is upgraded and configuration data brings the influence of existing network, realized the purpose of relying on GSM network expansion cdma network to cover again.
Secondly, write the information that needs network side configuration and broadcasting originally, avoided the data configuration of network side and the broadcasting of system message, simplified the workload of network side in terminal.
The 3rd, the present invention does not do big change to gsm system and terminal, and is simple and be easy to realize.
Description of drawings
Fig. 1 realizes the flow chart of WCDMA system and gsm system interoperability for support terminal.
Embodiment
Be that also the present invention is further described in more detail in conjunction with the accompanying drawings for example with the interoperability between WCDMA system and the gsm system below.
In terminal or preferably in SIM card, write frequency point information and sub-district reselection algorithm parameter Qsearch_I, FDD_Qmin and the FDD_Qoffset of several groups of fixing WCDMA systems in advance, search network signal behind the starting up of terminal, please refer to Fig. 1, have two kinds of situations: the one, shown in flow process among Fig. 11, terminal inserts the GSM network; The 2nd, shown in flow process among Fig. 12, terminal inserts the WCDMA network.
First kind of situation, referring to the flow process among Fig. 11, flow process 1 shows terminal is moved into the WCDMA network from the gsm system that inserts process.Specifically comprise the steps:
Whether step 103, terminal judges receive frequency point information and sub-district reselection algorithm parameter Qsearch_I, FDD_Qmin and the FDD_Qoffset of the WCDMA system that gsm system issues by BCCH, if do not receive, execution in step 104, if receive, execution in step 105;
The message search cell that step 105, terminal issue by BCCH according to gsm system judges whether suitable terminal is resident in the sub-district, execution in step 106 according to the C1 criterion and the C2 criterion of agreement regulation;
The method of interoperability writes the neighboring BS information and the sub-district reselection algorithm parameter of WCDMA system in advance between this support terminal realization system in terminal, make the GSM network not need to upgrade and dispose under the situation of neighboring BS information of WCDMA system, just can realize sub-district reselection functionality from gsm system to the WCDMA system, simplified the data configuration and the work of network side, simple to operate being easy to realized.
Second kind of situation, referring to the flow process among Fig. 12, flow process 2 shows terminal is moved into gsm system from the WCDMA network that inserts process.The network signal of WCDMA system is strong, support terminal inserts the WCDMA network, in this case since the WCDMA system configuration neighboring BS information of gsm system and sub-district reselection algorithm parameter from the WCDMA system to gsm system, if terminal need be carried out the sub-district gravity treatment from the WCDMA system to gsm system, then terminal is according to the message search cell that the WCDMA system issues, and judges whether the sub-district is fit to resident and then finishes sub-district gravity treatment from the WCDMA system to gsm system.
Because the WCDMA system is newly-built system, just can dispose the relevant parameter and the neighboring BS information of gsm system easily at the networking initial stage, does not need the present invention to realize so will realize the sub-district gravity treatment from the WCDMA system to gsm system.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. a support terminal is realized the method for interacting between communication systems, and it is characterized in that: write the frequency point information and the sub-district reselection algorithm parameter of the adjacent area of CDMA systems in advance in terminal, described method specifically comprises the steps:
A. starting up of terminal search network, the network signal intensity that searches global system for mobile communications GSM is enough to support terminal and inserts the GSM network, and then terminal inserts the GSM network;
B. whether terminal judges searches the frequency point information and the sub-district reselection algorithm parameter of the adjacent area of the cdma system that gsm system issues by BCCH channel of broadcast control;
If c. terminal does not search the frequency point information and the sub-district reselection algorithm parameter of the adjacent area of cdma system, the frequency point information of the adjacent area of the cdma system that writes of inquiry terminal itself then, search cell judges according to the sub-district reselection algorithm parameter that terminal itself writes whether suitable terminal is resident in the sub-district;
D. when having the suitable terminal in sub-district resident, terminal is carried out the sub-district reselection operation from the gsm system to the cdma system.
2. method according to claim 1 is characterized in that: the frequency point information of the adjacent area of described cdma system and sub-district reselection algorithm parameter write in the subscriber identification module of terminal.
3. method according to claim 1, it is characterized in that: this method further comprises: the network signal intensity that starting up of terminal searches cdma system is enough to support terminal access cdma network, then terminal inserts cdma network, neighboring BS information and sub-district reselection algorithm parameter according to the gsm system of cdma system configuration, it is resident to judge whether the sub-district is fit to terminal, when having the suitable terminal in sub-district resident, carry out the sub-district reselection operation from the cdma system to the gsm system.
4. method according to claim 1 is characterized in that: further comprise between described step a and b: terminal is initiated the 3G service request.
5. method according to claim 1 is characterized in that: further comprise between described step a and b: terminal detects the decay of GSM network signal.
6. method according to claim 4 is characterized in that: described 3G business comprises the combination in any of video telephone, video conferencing or high-speed data service or aforementioned business at least.
7. method according to claim 1, it is characterized in that: described step c further comprises: if terminal searching is to the frequency point information and the sub-district reselection algorithm parameter of the adjacent area of the cdma system of gsm system configuration, then search for corresponding sub-district according to the frequency point information of the adjacent area of cdma system, it is resident that the sub-district reselection algorithm parameter that issues by BCCH channel of broadcast control according to gsm system judges whether the sub-district is fit to terminal.
8. method according to claim 1 is characterized in that: described cdma system is a wideband CDMA system.
9. method according to claim 1 is characterized in that: described sub-district reselection algorithm parameter comprises that at least gsm system signal minimum level value Qsearch_I, the level minimum requirements FDD_Qmin of cdma system candidate cell of triggering cdma system cell measurement and the level difference value of CDMA candidate cell and current gsm system sub-district require FDD_Qoffset.
10. it is characterized in that according to Claim 8 or 9 described methods: described frequency point information and sub-district reselection algorithm parameter are one group of fixing value at least.
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| CN2005100829063A CN100407832C (en) | 2005-07-05 | 2005-07-05 | Method for supporting terminal to realize interacting between communication systems |
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| CN2005100829063A CN100407832C (en) | 2005-07-05 | 2005-07-05 | Method for supporting terminal to realize interacting between communication systems |
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| CN100407832C true CN100407832C (en) | 2008-07-30 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399563B (en) * | 2008-10-17 | 2012-07-04 | 华为终端有限公司 | Method, terminal and communication system for searching global mobile communication system |
| CN101651972B (en) * | 2009-09-15 | 2012-07-04 | 北京天碁科技有限公司 | Network selection method of TD-SCDMA/GSM double-module terminal |
| CN101707791A (en) * | 2009-11-20 | 2010-05-12 | 中兴通讯股份有限公司 | Mobile terminal and cell reselecting method thereof |
| CN102291706B (en) * | 2010-06-21 | 2015-07-01 | 中国移动通信集团公司 | Method, system and equipment for realizing third-generation (3G) video service through terminal staying second-generation (2G) |
| CN102196487B (en) * | 2011-06-03 | 2014-07-09 | 展讯通信（上海）有限公司 | Third-generation (3G) system neighbor cell measurement method for multi-card multi-mode mobile terminal |
| CN103442387B (en) * | 2011-06-03 | 2016-07-06 | 展讯通信（上海）有限公司 | The method that 3G system adjacent cell is measured by many cards multi-module mobile terminal |
| CN104936261A (en) * | 2014-03-21 | 2015-09-23 | 中兴通讯股份有限公司 | Terminal automation network finding method and apparatus |
| CN107396404B (en) * | 2016-05-16 | 2022-01-14 | 华为技术有限公司 | Cell reselection method and terminal |
| CN106358251B (en) * | 2016-08-27 | 2020-02-21 | 华为技术有限公司 | Network switching method and terminal equipment |
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