CN101242608B - Method and system for mobile terminal to search high-priority public land mobile network - Google Patents
Method and system for mobile terminal to search high-priority public land mobile network Download PDFInfo
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- CN101242608B CN101242608B CN2008100571040A CN200810057104A CN101242608B CN 101242608 B CN101242608 B CN 101242608B CN 2008100571040 A CN2008100571040 A CN 2008100571040A CN 200810057104 A CN200810057104 A CN 200810057104A CN 101242608 B CN101242608 B CN 101242608B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a searching method for public terrestrial mobile network with high priority of mobile terminals, including steps of: when mobile terminal roams in public terrestrial mobile network of visited area, and service is in idle, the mobile terminal acquires list of current available public terrestrial mobile networks; mobile terminal registers in public terrestrial mobile network with higher priority in the mentioned list, to acquire service of the public terrestrial mobile network with higher priority. Accordingly, the invention also discloses a system for mobile terminal to search public terrestrial mobile network with high priority. With such a system, the invention enhances searching efficiency for public terrestrial mobile network with high priority in roaming area, and reduces energy consumption of the mobile terminal in the searching process.
Description
Technical field
The present invention relates to field of mobile communication, relate in particular to a kind of method and system of mobile terminal to search high-priority public land mobile network.
Background technology
Along with the development of mobile technology, 2G (Second Generation, second generation mobile communication) technology will inevitably be replaced by 3G (Third Generation, 3G (Third Generation) Moblie) technology.In the process of 3G technology development, 2G network and 3G network will coexist for a long time in the 2G technology, and especially at the 3G networking initial stage, during not comprehensive covering of 3G network and the replacement 2G network, 3G network need be shared the intercommunication network resource with the 2G network.Therefore, in the zone of having only a kind of network coverage, cover for guaranteeing portable terminal continuous voice in communication process, the mobile terminal protocol stack need be realized automatic network search and the function of switching.But when 2G network and 3G network are safeguarded by different operators, mobile terminal roaming need register to the PLMN (public land mobile network, Public Land Mobile Network) of 2G network when having only the 2G network coverage regional; And when portable terminal was got back to 2G and all chlamydate zone of 3G network, the mobile terminal protocol stack need guarantee that the user in time gets back to 3G network on the basis that continuous speech covers, and enjoyed the high-quality service of 3G.When requiring portable terminal in visit VPLMN network, to be in no professional idle condition among the 3GPP TS 23.122, periodically search for the ownership place public land mobile network, and USIM (the common user identification module of search portable terminal, Universal SubsciberIdentity Module) during the public land mobile network of user and carrier customization is tabulated in the card, than the higher public land mobile network of current public land mobile network priority.In case terminal searching is to ownership place public land mobile network or other high-priority public land mobile networks, portable terminal will be attempted to this ownership place public land mobile network or the registration of other high-priority public land mobile networks, and leave current visit VPLMN network after registering successfully.
In order to search the high-priority public land mobile network of portable terminal, to determine whether to have searched ownership place public land mobile network and other high-priority public land mobile networks just portable terminal may need to scan all frequency ranges of supporting its work.Being at mobile terminal radio frequency under the state of continuous operation, is operation more consuming time, power consumption to the mobile terminal protocol stack.In addition, because portable terminal is supported business such as video, high-speed data download, this just has quite high requirement to the portable terminal energy consumption, how can guarantee that portable terminal in time get back to ownership place public land mobile network or other high-priority public land mobile networks, and to accelerate network search procedure simultaneously be insider institute questions of common interest.
The general network process of searching under automatic mode is to attempt one by one according to the public land mobile network priority of portable terminal, and the priority of ownership place public land mobile network is the highest.And portable terminal to search the process of net be to attempt specifying the resident process in public land mobile network sub-district.If specify the carrier frequency planning of public land mobile network unknown, portable terminal may need to scan the sub-district that the frequency of all supports just can determine whether to satisfy resident condition.And mobile terminal roaming generally all is because no ownership place public land mobile network covers to visit VPLMN network, the result of this periodicity search high-priority public land mobile network is likely that portable terminal can't find ownership place public land mobile network or other high-priority public land mobile networks to cover, so this searching method has just been done a lot of useless trials, and the energy consumption of portable terminal is also higher because repeatedly searching for public land mobile network covering failure.
Have a kind of like this method in the prior art, this method adds the speed of short scan carrier frequency by the scope of dwindling carrier search, thereby reduces the search high-priority public land mobile network of portable terminal energy consumption.For example, denomination of invention is " method that is used for radiotelephone to scan for higher priority public land mobile network ", application number is the Chinese patent application of CN200480010020, method in this patent application, be used for (comprising ownership) Public Land Mobile Nerwork of radiotelephone to scan for higher priority, and need not in all possible wireless access technology and frequency, to search for.This method comprises the first step: set up higher priority or all wireless access technologys of home public land mobile network in using all frequencies comprise tabulation.Next step comprise radio telephone is camped on higher priority or the ownership place public land mobile network.The next step comprise the radio telephone that preempted from higher priority or the ownership place public land mobile network obtain to come from the tabulation that comprises of establishment step.Then, when being interviewed during public land mobile network of radiotelephone roams to a lower priority, it can only use those frequencies that comprise in the tabulation to begin search ownership (with higher priority) public land mobile network, thereby saves the power of battery.
This method is at first stored all carrier frequency tabulations of high priority or ownership place public land mobile network, its prerequisite is that portable terminal was once registered these public land mobile networks, and network side has been issued the complete carrier frequency information of the relevant public land mobile network of portable terminal; Secondly when mobile terminal roaming arrives other public land mobile networks, utilize the carrier frequency of having deposited to dwindle the hunting zone, to reach purpose of power saving.This method depends on the public land mobile network carrier frequency information that network side provides, and this information is option on agreement, and is variant with manufacturer's realization, cannot be taken as proof.When network side did not provide enough carrier frequency information, portable terminal also needed to carry out the full frequency band search, so just can't power saving.And the memory space of portable terminal is valuable, can not guarantee to have the carrier frequency information of all public land mobile networks, and said method can not guarantee still power saving when not having stored information to the serious dependence of stored information.
In summary, the technology of existing mobile terminal to search high-priority public land mobile network obviously exists inconvenience and defective, so be necessary to be improved on reality is used.
Summary of the invention
At above-mentioned defective, the object of the present invention is to provide a kind of method and system of mobile terminal to search high-priority public land mobile network, with the efficient of raising portable terminal, and reduce the energy consumption of portable terminal in the process of search high-priority public land mobile network at the roaming place search high-priority public land mobile network.
To achieve these goals, the invention provides a kind of method of mobile terminal to search high-priority public land mobile network, comprising:
A. when mobile terminal roaming in visit VPLMN network, and it is professional idle the time, portable terminal obtains the public land mobile network tabulation that current mobile terminal can be used;
B. the high-priority public land mobile network registration of portable terminal in the public land mobile network tabulation that described current mobile terminal can be used is to obtain the service of this high-priority public land mobile network.
The method according to this invention, described steps A comprises:
When A1. portable terminal is in the visit VPLMN network, start its periodically timer of search high-priority public land mobile network;
A2. when described timer expiry, portable terminal judges whether the mobile terminal protocol stack is in idle condition, is execution in step A3 then, otherwise execution in step A4;
A3. portable terminal obtains the public land mobile network tabulation that current mobile terminal can be used;
A4. portable terminal continues to use the service of visit VPLMN network.
The method according to this invention, described step B comprises:
B1. portable terminal judge described current mobile terminal can with public land mobile network tabulation in whether comprise and do not attempt the high-priority public land mobile network that connects, be execution in step B2 then, otherwise execution in step B4;
B2. portable terminal selects to attempt the high-priority public land mobile network request registration of connection in the public land mobile network tabulation that described current mobile terminal can be used;
B3. portable terminal judges whether successfully to register and is resident to the described high-priority public land mobile network that is connected attempted, and is execution in step B4 then, otherwise returns step B1;
B4. portable terminal stops at the timer timing of roaming place, obtains the network service at described high-priority public land mobile network.
The method according to this invention comprises after the described step B2:
B3 '. portable terminal judge current successfully registration and resident to high-priority public land mobile network whether be the ownership place public land mobile network of described portable terminal, be execution in step B4 then, otherwise return steps A 1.
The method according to this invention, among the described step B3 ', portable terminal judges that whether high-priority public land mobile network that current success registers to is that the step of the ownership place public land mobile network of described portable terminal comprises: the public land mobile network identification code of the ownership place public land mobile network of the more current registration of mobile terminal protocol stack whether with the common user identification module of portable terminal in public land mobile network to insert the public land mobile network identification code of ownership place public land mobile network of selective listing document definition consistent, if consistently show that then the public land mobile network that current success registers to is the ownership place public land mobile network of described portable terminal.
The method according to this invention, described high-priority public land mobile network is meant, the public land mobile network of operator's control inserts in selective listing file and the public land mobile network access selective listing file in the common user identification module of portable terminal, and the priority level of definition is than the higher public land mobile network of current visit VPLMN network;
Described timer duration is 0 o'clock, and portable terminal is not searched for high-priority public land mobile network; If timer duration is not 0, then length is 6 minutes the most in short-term, and the longest duration is 8 hours; Default to 1 hour.
The method according to this invention, in the described steps A 2, portable terminal is judged when described timer expiry, whether the mobile terminal protocol stack is in idle condition, be that then portable terminal obtains in the process of current available public land mobile network tabulation, all available carrier frequency of mobile terminal protocol stack scan current mobile terminal, and on each available carrier frequencies, search for a sub-district the strongest; And it is synchronous that Primary Common Control Physical Channel is set up in each the strongest sub-district, and reading system broadcasting is to obtain this encoding list of the public land mobile network of strong sub-district.
The method according to this invention, when described portable terminal is supported the multiple network standard, the ownership place public land mobile network inserts the selective listing file in the common user identification module of more current visit VPLMN network and portable terminal, visit VPLMN network inserts the selective listing file, and the public land mobile network of operator's control inserts the listing file of the public land mobile network of being preserved in the selective listing file, determine a plurality of ownership place public land mobile networks public land mobile network tabulation higher of portable terminal than current visit VPLMN network priority, the frequency information of under the diverse network standard, planning with the ownership place public land mobile network that obtains portable terminal and high-priority public land mobile network, and on each frequency the search the strongest sub-district, set up with the strongest sub-district synchronously and reading system broadcasting, obtain current available public land mobile network coverage condition.
In order to realize above-mentioned another goal of the invention, the invention provides a kind of system of mobile terminal to search high-priority public land mobile network, comprising:
Search module is arranged at portable terminal, is used for working as mobile terminal roaming in visit VPLMN network, and its business is obtained the public land mobile network tabulation that current mobile terminal can be used in the time of the free time;
Registration Module is arranged at portable terminal, and the high-priority public land mobile network registration that the public land mobile network that is used for can using to described current mobile terminal is tabulated is to obtain the service of this high-priority public land mobile network.
According to system of the present invention, described system also comprises:
Timer is arranged at portable terminal, is used for the regularly time of mobile terminal period search high-priority public land mobile network.
The present invention is by being in visit VPLMN network and business during the free time at portable terminal, periodically searching for current mobile terminal can tabulate with public land mobile network, find in time whether current region exists ownership place public land mobile network or other high-priority public land mobile networks to cover, when existing ownership place public land mobile network or other high-priority public land mobile networks to cover, initiate public land mobile network and select registration, the present invention helps to reduce the number of times of mobile scanning terminal carrier frequency, avoid attempting selecting the waste of the energy consumption that uncovered public land mobile network causes, reduce the terminal energy consumption and arrive, improve the efficient of successful search high-priority public land mobile network.
Description of drawings
Fig. 1 is the system construction drawing of mobile terminal to search high-priority public land mobile network provided by the invention;
Fig. 2 is the system construction drawing of the mobile terminal to search high-priority public land mobile network that provides in the one embodiment of the invention;
Fig. 3 is the method flow diagram of mobile terminal to search high-priority public land mobile network provided by the invention;
Fig. 4 is the method flow diagram of the mobile terminal to search high-priority public land mobile network in the one embodiment of the invention;
Fig. 5 is the method flow diagram of the mobile terminal to search high-priority public land mobile network in another embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Basic thought of the present invention is: when portable terminal is in visit VPLMN network and professional free time, periodically searching for current mobile terminal can tabulate with public land mobile network, and in this tabulation, do not attempted the high-priority public land mobile network that connects and initiated the registration request, to obtain the service of this high-priority public land mobile network.
Fig. 1 is the system construction drawing of mobile terminal to search high-priority public land mobile network provided by the invention, and this system has comprised:
Fig. 2 is the system construction drawing of the mobile terminal to search high-priority public land mobile network that provides in the one embodiment of the invention; In this embodiment, the system of mobile terminal to search high-priority public land mobile network has also comprised:
Fig. 3 is the method flow diagram of mobile terminal to search high-priority public land mobile network provided by the invention, is described below:
In step S301, when mobile terminal roaming in visit VPLMN network, and it is professional idle the time, portable terminal obtains the public land mobile network tabulation that current mobile terminal can be used.In this step, the search module 101 that places portable terminal is when portable terminal is in the service of use visit VPLMN network, and when the protocol stack of portable terminal is under the idle condition, the public land mobile network tabulation that the search current mobile terminal can be used has comprised all current public land mobile networks that service can be provided for portable terminal in this tabulation; High-priority public land mobile network particularly, the public land mobile network of high priority comprises the Home Public Land Mobile Network network.
In step S302, the high-priority public land mobile network registration of portable terminal in the public land mobile network tabulation that described current mobile terminal can be used is to obtain the service of this high-priority public land mobile network.In this step, the high-priority public land mobile network registration of the public land mobile network tabulation that the Registration Module 102 that places portable terminal can be used to described current mobile terminal.Registration Module 102 is after high-priority public land mobile network is registered successfully, and portable terminal just can obtain better public land mobile network service, and perhaps this public land mobile network is the Home Public Land Mobile Network network of portable terminal; Or when the Home Public Land Mobile Network network of portable terminal can not provide service for it, be that the public land mobile network of other high priorities provides service for this portable terminal.
Fig. 4 is the method flow diagram of the mobile terminal to search high-priority public land mobile network in one embodiment of the present of invention, is described below;
In step S401, when portable terminal is in the visit VPLMN network, start its periodically timer 103 of search high-priority public land mobile network.Because the 2G network may be safeguarded by different operators with 3G network, roams in the public land mobile network that certain operator safeguards so portable terminal inevitably can exist.When portable terminal is in the visit VPLMN network, start timer 103, be the timing of mobile terminal period search high-priority public land mobile network by timer 103.
In a plurality of embodiment of the present invention, described high-priority public land mobile network is meant, the public land mobile network of operator's control inserts in selective listing file (EFOPLMNwAcT) and the public land mobile network access selective listing file (EFPLMNwAcT) in the common user identification module of portable terminal, and defined priority level is than the higher public land mobile network of current visit VPLMN network.
In step S402, when described timer 103 is overtime, portable terminal judges whether the mobile terminal protocol stack is in idle condition, be execution in step S403 then, otherwise execution in step S408, when timer 103 is overtime,, then can carry out the search of available public land mobile network if the mobile terminal protocol stack is in idle condition; If the mobile terminal protocol stack is under the busy state, then do not start the search of the public land mobile network that portable terminal can use, to guarantee that existing business is not interrupted; When treating that the timer 103 of portable terminal next time is overtime, judge the operating state of mobile terminal protocol stack once more, if it is in the search that idle condition is just carried out the public land mobile network tabulation that portable terminal can use.
In step S403, portable terminal obtains the public land mobile network tabulation that current mobile terminal can be used.When portable terminal is in the roaming place, may have a plurality of public land mobile networks and can provide service for it, in this step, portable terminal can obtain the public land mobile network tabulation that current mobile terminal can be used through the search of search module 101.
Initiate available public land mobile network list process at the Idle state portable terminal, in this process, the 3G protocol stack need scan current all available carrier frequency, sub-district the strongest of search on each available carrier frequencies.The strongest so-called sub-district is meant RSCP (the Received SingnalCode Power on the cell channel that the particular network standard requires, received signal power) the strongest sub-district, such as TDD (Time Division Puplex, time division duplex) the strongest sub-district PCPCH (Physical common packet channel, physical common grouped channels) the RSCP maximum on, FDD (Frequency division duplex, Frequency Division Duplexing (FDD)) the strongest sub-district CPICH (Common pilot channel, the common pilots channel) the RSCP maximum on, RSSI maximum on GSM (Global System for Mobile Communications, global system for mobile communications) sub-district, the strongest sub-district main carrier frequency.It is synchronous that PCPCH is set up in each the strongest sub-district, and reading system broadcasting obtains the public land mobile network sign on this sub-district.
In the present embodiment, portable terminal is judged when described timer 103 is overtime, whether the mobile terminal protocol stack is in idle condition, be that then portable terminal obtains in the process of current available public land mobile network tabulation, all available carrier frequency of mobile terminal protocol stack scan current mobile terminal, and on each available carrier frequencies, search for a sub-district the strongest; And it is synchronous that Primary Common Control Physical Channel is set up in each the strongest sub-district, and reading system broadcasting is to obtain this encoding list of the public land mobile network of strong sub-district.
If portable terminal is supported the multiple network standard, then after obtaining the encoding list of an available public land mobile network on all available carrier frequency of current network standard, also need scan the available public land mobile network tabulation on other network formats again, main flow process is similar, but the sub-district synchronizing process is variant because of network formats.Because the process of scanning band is slow, and the purpose of considering the public land mobile network search is in order to find the covering of ownership place public land mobile network and other high-priority public land mobile networks, if the mobile terminal protocol stack have ownership place public land mobile network and other high-priority public land mobile networks frequency planning information, can dwindle the scope of frequency scanning, only search for the frequency at ownership place public land mobile network and high-priority public land mobile network place, accelerate the speed of available public land mobile network tabulation.And the frequency planning information of public land mobile network can be obtained by network side message or portable terminal customized information.
In another embodiment of the present invention, when described portable terminal is supported the multiple network standard, the ownership place public land mobile network inserts selective listing file (EFHPLMNwAcT) in the common user identification module of more current visit VPLMN network and portable terminal, visit VPLMN network inserts selective listing file (EFPLMNwAcT), and the public land mobile network of operator's control inserts the listing file of the public land mobile network of being preserved in the selective listing file (EFOPLMNwAcT), determine the ownership place public land mobile network of portable terminal and the public land mobile network tabulation higher than current visit VPLMN network priority, obtain the ownership place public land mobile network of portable terminal and the frequency information that other high-priority public land mobile networks are planned under the diverse network standard, and in above-mentioned band scan available frequencies, the strongest sub-district of search on each frequency, set up with the strongest sub-district synchronously and reading system broadcasting, obtain current available public land mobile network coverage condition.
In step S404, portable terminal judge described current mobile terminal can with public land mobile network tabulation in whether comprise and do not attempt the high-priority public land mobile network that connects, be execution in step S405 then, otherwise execution in step S407.In a single day portable terminal finds the ownership place public land mobile network of portable terminal and/or the covering of other high-priority public land mobile networks, is just attempted selecting and registration by Registration Module 102.Because determined to exist the network coverage before this, so Registration Module 102 selects registration ownership place public land mobile network and/or other high-priority public land mobile network possibility of success than higher.And current mobile terminal can with public land mobile network tabulation in when comprising a plurality of public land mobile network, some public land mobile network is the lower public land mobile network of priority than current mobile terminal visit VPLMN network, for for portable terminal provides better service, then portable terminal should be selected the public land mobile network than current public land mobile network higher level for its service.And in the public land mobile network of these higher levels, perhaps some be that portable terminal had been attempted connection, but fail to obtain the service of this high-priority public land mobile network.Therefore, in the process of follow-up high-priority public land mobile network, should continue to attempt selecting other high-priority public land mobile networks of not attempting according to priority orders.
In step S405, the high-priority public land mobile network request that portable terminal is selected to attempt connecting in the public land mobile network tabulation that described current mobile terminal can be used is registered.The high-priority public land mobile network request that Registration Module 102 in the portable terminal is attempted connecting in the public land mobile network tabulation that current mobile terminal can be used is registered; The high-priority public land mobile network request registration of not attempting in the selective listing connecting can be avoided unnecessary search work, improves the efficient that portable terminal obtains the high-priority public land mobile network service.
In step S406, portable terminal judges whether successfully to register and is resident to the described high-priority public land mobile network that is connected attempted, and is execution in step S407 then, otherwise returns step S404; After the high-priority public land mobile network request registration that Registration Module 102 is not attempted connecting in the public land mobile network tabulation that current mobile terminal can be used; If this not success of request registration, perhaps resident not success, then need to rejudge described current mobile terminal can with the public land mobile network tabulation in whether comprise and do not attempt other high-priority public land mobile networks of connecting, send the registration request with according to priority order to other high-priority public land mobile networks of not attempting connecting.
In step S407, portable terminal stops at timer 103 timing of roaming place, obtains the network service at described high-priority public land mobile network.After the high-priority public land mobile network request registration of in the public land mobile network tabulation that current mobile terminal can be used, not attempting connecting of Registration Module 102 successes; Portable terminal stops at timer 103 timing of roaming place, obtains the network service at described high-priority public land mobile network.
In step S408, portable terminal continues to use the service of visit VPLMN network.The mobile terminal protocol stack is in busy state, and then portable terminal continues to use the service of visit VPLMN network.
In additional embodiments of the present invention, its method flow diagram as shown in Figure 5, step S501～step S506 is identical with step S401～step S406 of a last embodiment, step S407 and step S508; Step is identical with step S509 with S408; No longer repeat at this.Different with a last embodiment is, in step S507, portable terminal judges whether current successfully to register to described high-priority public land mobile network be the ownership place public land mobile network of described portable terminal, is execution in step S508 then, otherwise returns step S501.Owing to its ownership place public land mobile network of acquisition for portable terminal obtains the network service is best, therefore in the present invention, it is that mobile terminal to search just stops the visit VPLMN network service that portable terminal obtains in the roaming place to its ownership place public land mobile network that such mode is provided.
In one embodiment of the invention; Among the step S507 portable terminal judge high-priority public land mobile network that current success registers to whether the step of the ownership place public land mobile network of described portable terminal comprise: portable terminal judge current successfully register resident to high-priority public land mobile network whether the step of the ownership place public land mobile network of described portable terminal comprise: whether the public land mobile network identification code of the ownership place public land mobile network of the more current registration of mobile terminal protocol stack consistent with the public land mobile network identification code of ownership place public land mobile network of public land mobile network access selective listing document definition in the common user identification module of portable terminal, if unanimously show that then the public land mobile network that current success registers to is the ownership place public land mobile network of described portable terminal.
As long as portable terminal is in the roaming of visit VPLMN network, just be merely able to enjoy the service that visit VPLMN network provides.Such as the portable terminal home network is 3G network, but roams into a zone of having only the 2G network coverage, just can't proceed the 3G service.During roaming,, require mobile terminal period ground search ownership place public land mobile network and other high-priority public land mobile networks in time finding Home Public Land Mobile Network network and the covering of other high-priority public land mobile networks.
The present invention is by being in visit VPLMN network and business during the free time at portable terminal, periodically search for current available public land mobile network network list, find in time whether current region exists ownership place public land mobile network or other high-priority public land mobile networks to cover, when existing ownership place public land mobile network or other high-priority public land mobile networks to cover, initiate public land mobile network and select registration, the present invention helps to reduce the number of times of mobile scanning terminal carrier frequency, avoid attempting selecting the waste of the energy consumption that uncovered public land mobile network causes, reduce the terminal energy consumption and arrive, improve the efficient of successful search high-priority public land mobile network.The method that the present invention searches for the ownership place public land mobile network or plays high-priority public land mobile network is that the ownership place public land mobile network that the portable terminal of 3G network or 2G network is got back to 2G or 3G from the roaming place public land mobile network of 2G or 3G can use the present invention applicable to the Home Public Land Mobile Network network.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. the method for a mobile terminal to search high-priority public land mobile network is characterized in that, comprising:
A. when mobile terminal roaming in visit VPLMN network, and it is professional idle the time, portable terminal obtains the public land mobile network tabulation that current mobile terminal can be used;
B. the high-priority public land mobile network registration of portable terminal in the public land mobile network tabulation that described current mobile terminal can be used is to obtain the service of this high-priority public land mobile network;
Wherein, described steps A comprises:
When A1. portable terminal is in the visit VPLMN network, start its periodically timer of search high-priority public land mobile network;
A2. when described timer expiry, portable terminal judges whether the mobile terminal protocol stack is in idle condition, is execution in step A3 then, otherwise execution in step A4;
A3. portable terminal obtains the public land mobile network tabulation that current mobile terminal can be used;
A4. portable terminal continues to use the service of visit VPLMN network;
Wherein, in the described steps A 2, portable terminal is judged when described timer expiry, whether the mobile terminal protocol stack is in idle condition, be that then portable terminal obtains in the process of current available public land mobile network tabulation, all available carrier frequency of mobile terminal protocol stack scan current mobile terminal, and on each available carrier frequencies, search for a sub-district the strongest; And it is synchronous that Primary Common Control Physical Channel is set up in each the strongest sub-district, and reading system broadcasting is to obtain this encoding list of the public land mobile network of strong sub-district.
2. method according to claim 1 is characterized in that, described step B comprises:
B1. portable terminal judge described current mobile terminal can with public land mobile network tabulation in whether comprise and do not attempt the high-priority public land mobile network that connects, be execution in step B2 then, otherwise execution in step B4;
B2. portable terminal selects to attempt the high-priority public land mobile network request registration of connection in the public land mobile network tabulation that described current mobile terminal can be used;
B3. portable terminal judges whether successfully to register and is resident to the described high-priority public land mobile network that is connected attempted, and is execution in step B4 then, otherwise returns step B1;
B4. portable terminal stops at the timer timing of roaming place, obtains the network service at described high-priority public land mobile network.
3. method according to claim 2 is characterized in that, comprises after the described step B2:
B3 '. portable terminal judge current successfully registration and resident to high-priority public land mobile network whether be the ownership place public land mobile network of described portable terminal, be execution in step B4 then, otherwise return steps A 1.
4. method according to claim 3, it is characterized in that, among the described step B3 ', portable terminal judges that whether high-priority public land mobile network that current success registers to is that the step of the ownership place public land mobile network of described portable terminal comprises: the public land mobile network identification code of the ownership place public land mobile network of the more current registration of mobile terminal protocol stack whether with the common user identification module of portable terminal in public land mobile network to insert the public land mobile network identification code of ownership place public land mobile network of selective listing document definition consistent, if consistently show that then the public land mobile network that current success registers to is the ownership place public land mobile network of described portable terminal.
5. method according to claim 1, it is characterized in that, described high-priority public land mobile network is meant, the public land mobile network of operator's control inserts in selective listing file and the public land mobile network access selective listing file in the common user identification module of portable terminal, and the priority level of definition is than the higher public land mobile network of current visit VPLMN network;
Described timer duration is 0 o'clock, and portable terminal is not searched for high-priority public land mobile network; If timer duration is not 0, then length is 6 minutes the most in short-term, and the longest duration is 8 hours; Default to 1 hour.
6. method according to claim 1, it is characterized in that, when described portable terminal is supported the multiple network standard, the ownership place public land mobile network inserts the selective listing file in the common user identification module of more current visit VPLMN network and portable terminal, visit VPLMN network inserts the selective listing file, and the public land mobile network of operator's control inserts the listing file of the public land mobile network of being preserved in the selective listing file, determine a plurality of ownership place public land mobile networks public land mobile network tabulation higher of portable terminal than current visit VPLMN network priority, the frequency information of under the diverse network standard, planning with the ownership place public land mobile network that obtains portable terminal and high-priority public land mobile network, and on each frequency the search the strongest sub-district, set up with the strongest sub-district synchronously and reading system broadcasting, obtain current available public land mobile network coverage condition.
7. a realization is characterized in that as the system of method as described in any claim of claim 1～6, comprising:
Timer is arranged at portable terminal, is used for the regularly time of mobile terminal period search high-priority public land mobile network, and wherein, described timer starts when portable terminal is in the visit VPLMN network;
Search module is arranged at portable terminal, is used for working as mobile terminal roaming in visit VPLMN network, and its business is obtained the public land mobile network tabulation that current mobile terminal can be used in the time of the free time; When described timer expiry, described search module judges whether the mobile terminal protocol stack is in idle condition, then obtains the public land mobile network tabulation that current mobile terminal can be used if the judgment is Yes; Otherwise continue to use the service of visit VPLMN network; Wherein, when described timer expiry, described search module judges whether the mobile terminal protocol stack is in idle condition, then described if the judgment is Yes search module obtains in the process of current available public land mobile network tabulation, all available carrier frequency of mobile terminal protocol stack scan current mobile terminal, and on each available carrier frequencies, search for a sub-district the strongest; And it is synchronous that Primary Common Control Physical Channel is set up in each the strongest sub-district, and reading system broadcasting is to obtain this encoding list of the public land mobile network of strong sub-district;
Registration Module is arranged at portable terminal, and the high-priority public land mobile network registration that the public land mobile network that is used for can using to described current mobile terminal is tabulated is to obtain the service of this high-priority public land mobile network.
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| CN2008100571040A CN101242608B (en) | 2008-01-29 | 2008-01-29 | Method and system for mobile terminal to search high-priority public land mobile network |
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| CN2008100571040A CN101242608B (en) | 2008-01-29 | 2008-01-29 | Method and system for mobile terminal to search high-priority public land mobile network |
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| CN101242608B true CN101242608B (en) | 2011-07-13 |
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