CN101106826A - Automatic network selection method and automatic network selection device - Google Patents
Automatic network selection method and automatic network selection device Download PDFInfo
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Abstract
The invention provides a method and a device for automatically selecting network for a dual mode mobile terminal from 2G network and 3G network. The method for automatically selecting network includes: step 1, periodically searching whether a 3G network is present when the dual mode terminal is retained in a 2G network and in idle state, and measuring related information of the 3G network if a 3G network is determined to be present; and step 2, judging whether the related information measured of the 3G network satisfies a predetermined gate limit, and determining if the network mode should be switched or not based on the judging result. Thus, with the invention, the problem that automatic selection on network cannot be performed when a user accesses from a GSM network to a TD-SCDMA network is solved.
Description
Technical field
The present invention relates to field of wireless communication, relate in particular to the automatic network selection method and the automatic network selection device of a kind of 2G network and 3G network mode mobile terminal.
Background technology
Continuous maturation along with 3-G (Generation Three mobile communication system), the continuous quickening of commercial process, and in the progressively promotion and application in the whole world, the abundant more personalized new business that increasing user brings into use 3G network to bring will be had, but because the comprehensive and integrality of the 2G network coverage at present, 2G and 3G network will coexist in a period of time, therefore support the multi-module mobile terminal of multiple network standard just to arise at the historic moment.
TD-SCDMA (Time Division-Synchronous Code Division MultipleAccess, Time Division-Synchronous Code Division Multiple Access inserts) and GSM (Global System for Mobilecommunication, global system for mobile communications) double-mode single-standby terminal (mode mobile terminal) is meant that terminal can support GSM network and these two network communications technologys of TD-SCDMA network simultaneously, it can therefrom make a choice according to the needs of environment or practical operation, which network technology more can play a role, just allow terminal switch to the work of going down of which kind of pattern, if in one mode, terminal communication is of low quality or when other bad communication phenomenons occurring, can forward the another one network schemer to and carry out work.
At the initial stage of 3G networking, because present 2G network integrity and covering aspect have remarkable advantages, so the 3G network at initial stage must be based on the 2G network, it adopts focus or local mode and 2G network that covers to carry out mixed networking.In this case, the strategy of mode mobile terminal network selection under these two kinds of networks becomes to attach most importance to and difficult point.
There are following two kinds of situations at present:
Situation one: two kinds of networks of different access technologies are operated by same operator.
In this case, the PLMN ID of two kinds of networks is identical, but the BSC of GSM network (2G network) does not support the setting of R99 sign at present, so mode mobile terminal can't obtain the relevant parameter of 3G (TD-SCDMA network) sub-district from the GSM broadcast, thereby can't carry out sub-district gravity treatment from 2G to the 3G network, after mode mobile terminal resides in the GSM network, will stay in this network always, even the position has good 3G network to exist, also can't be automatically brought in the 3G network, having caused the 3G network resource to waste greatly like this, but also increased the load of 2G network, is very disadvantageous to the development of TD-SCDMA.
Situation two: two kinds of networks of different access technologies are operated by different operators.
In this case, the PLMN ID difference of two kinds of networks, if two network settings are EPLMN (equivalent PLMN, the PLMN of equivalence), promptly two networks are equivalent to same PLMN, situation and above-mentioned situation one are basic identical.Thereby, mode mobile terminal cause mode mobile terminal oneself to switch in the 3G network because can't obtaining the relevant parameter of 3G sub-district from the broadcast of GSM network, in addition, if two networks are not set to EPLMN, the notion that does not just have the sub-district gravity treatment so between these two networks, two internetwork passes are the relation of home network and visited network, i.e. roaming relationships.The dual-mode terminal that resides in the 2G network still can't automatically switch to 3G network after entering 3G network (TD-SCDMA network) coverage.
In sum, after above-mentioned two kinds of situations are analyzed, people have pressed for a kind of technology, it can make mode mobile terminal confirm another network under the GSM pattern, be whether the TD-SDMA network is available, so that switching and resident in the TD-SCDMA network in appropriate, and obtain the abundant personalized business service of 3G network, also can reduce the load of 2G network in addition, thereby reach the sound development of two kinds of networks.
Summary of the invention
In view of the above problems, the object of the invention is to provide the automatic network selection method and the automatic network selection device of a kind of TD-SCDMA and GSM mode mobile terminal, its solved the user by the GSM network enter into behind the TD-SCDMA network can't automatic network selection problem.
According to an aspect of the present invention, the automatic network selection method of a kind of 2G network and 3G network mode mobile terminal is provided, it comprises: step 1, when mode mobile terminal resides in the 2G network, and when being in idle pulley, periodically whether search exists 3G network, and in the relevant information that searches the 3G network that measurement searches under the situation of 3G network; And step 2, judge whether the relevant information of the 3G network that measures satisfies predetermined threshold, and determine whether to start the network schemer switching according to judged result.
At 2G network and 3G network is under the situation about being operated by different operators, further comprising the steps of before step 1: that PLMN (public land mobile network, the Public Land Mobile Nerwork) access priority of 3G network is made as and is higher than the 2G network.
Wherein, the PLMN access priority of 3G network is made as HPLMN (homePLMN, Home Public Land Mobile Network), and the PLMN access priority of 2G network is made as VPLMN (visited PLMN, visit Public Land Mobile Nerwork).
In addition, in step 2, when the relevant information of the 3G network that measures does not satisfy predetermined threshold, do not start network schemer and switch, mode mobile terminal resides in the 2G network, and turns back to step 1.
And, in step 2, when the relevant information of the 3G network that measures satisfies predetermined threshold, start network schemer and switch, mode mobile terminal is switched in the 2G network.
As mentioned above, in step 2, when the relevant information of the 3G network that measures satisfies predetermined threshold, whether the time delay that the relevant information of judging 3G network satisfies predetermined threshold satisfies preset time delay, and satisfying under the situation of preset time delay, start network schemer and switch, mode mobile terminal is switched in the 2G network, otherwise, do not start network schemer and switch.
Relevant information comprises received signal code power and carrier/interface ratio.
According to a further aspect in the invention, the automatic network selection device of a kind of 2G network and 3G network mode mobile terminal is provided, it comprises: the search measuring unit, be used for residing in the 2G network when mode mobile terminal, and when being in idle pulley, periodically whether search exists 3G network, and in the relevant information that searches the 3G network that measurement searches under the situation of 3G network; And switch unit, be used to judge whether the relevant information of the 3G network that measures satisfies predetermined threshold, and determine whether to start the network schemer switching according to judged result.
Above-mentioned automatic network selection device also comprises setup unit, is used under 2G network and 3G network are situation by the different operators running, the PLMN access priority of 3G network is made as be higher than the 2G network.
Wherein, setup unit is made as HPLMN with the PLMN access priority of 3G network, and the PLMN access priority of 2G network is made as VPLMN.
And switch unit does not satisfy under the situation of predetermined threshold in the relevant information of the 3G network that measures, and does not start network schemer and switches, and mode mobile terminal resides in the 2G network.
Switch unit satisfies under the situation of predetermined threshold in the relevant information of the 3G network that measures, and starts network schemer and switches, and mode mobile terminal is switched in the 2G network.
In addition, switch unit satisfies under the situation of predetermined threshold in the relevant information of the 3G network that measures, whether the time delay that the relevant information of judging 3G network satisfies predetermined threshold satisfies preset time delay, and satisfying under the situation of preset time delay, starting network schemer switches, mode mobile terminal is switched in the 2G network, otherwise, do not start network schemer and switch.
Relevant information comprises received signal code power and carrier/interface ratio.
By the present invention, can make operator according to the actual conditions balance 2G network of network and the traffic density of 3G network, both helped the progressively development of 3G network, also alleviated the active demand of the upgrading 2G of operator net simultaneously.
Simultaneously, because terminal only detects the signal of target inserting technology networks in the network selection process, and do not send signal, so terminal power consumption in the network selection process is very little, and the time that network selection continues is very short, the length of one's sleep when only a little having shortened terminal standby, very little to the influence of the power consumption under the holding state of terminal, can ignore substantially.
And, because terminal is just carried out network selection under idle pulley, that is to say that the terminal of this moment only need receive a spot of system information, do not need paging receiving message, do not need to measure, so can not influence the business of terminal under the GSM pattern.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart according to automatic network selection method of the present invention;
Fig. 2 is the particular flow sheet according to the automatic network selection method of the embodiment of the invention; And
Fig. 3 is the structured flowchart according to automatic network selection device of the present invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Fig. 1 is the flow chart according to automatic network selection method of the present invention.As shown in Figure 1, the automatic network selection method of 2G network and 3G network mode mobile terminal comprises:
Step S102, when mode mobile terminal resides in the 2G network, and when being in idle pulley, periodically whether search exists 3G network, and in the relevant information that searches the 3G network that measurement searches under the situation of 3G network; And
Step S104 judges whether the relevant information of the 3G network that measures satisfies predetermined threshold, and determines whether to start the network schemer switching according to judged result.
Under 2G network and 3G network are situation by the different operators running, further comprising the steps of before step S102: as the PLMN access priority of 3G network is made as is higher than the 2G network.
Wherein, the PLMN access priority of 3G network is made as HPLMN, and the PLMN access priority of 2G network is made as VPLMN.
In addition, in step S104, when the relevant information of the 3G network that measures does not satisfy predetermined threshold, do not start network schemer and switch, mode mobile terminal resides in the 2G network, and turns back to step S102.
And, in step S104, when the relevant information of the 3G network that measures satisfies predetermined threshold, start network schemer and switch, mode mobile terminal is switched in the 2G network.
As above, in step S104, when the relevant information of the 3G network that measures satisfies predetermined threshold, whether the time delay that the relevant information of judging 3G network satisfies predetermined threshold satisfies preset time delay, and satisfying under the situation of preset time delay, start network schemer and switch, mode mobile terminal is switched in the 2G network, otherwise, do not start network schemer and switch.
Relevant information comprises received signal code power and carrier/interface ratio.
As can be seen from the above description:
At first, TD-SCDMA and GSM double-mode single-standby terminal should be supported to be transformed into the GSM pattern because TD-SCDMA network coverage problem causes in the time of can't providing service for terminal.
Then, under the situation that two kinds of networks are operated by same operator, the PLMN ID of two networks is identical, TD-SCDMA and GSM double-mode single-standby terminal are after searching the signal of 3G frequency range under the idle condition of GSM pattern, judge, at signal strength signal intensity RSCP (Received Signal Code Power, received signal code power) and C/I (carrier/interface ratio) (preventing that the mode mobile terminal user from covering at 3G network causes pattern frequently to switch when the edge moves after satisfy setting predetermined threshold and time delay and also satisfying certain predetermined threshold, increase system loading and terminal power consumption), the start-up mode conversion is attempted selecting also resident in 3G network.
Under the situation that two kinds of networks are operated by different operators, the PLMNID difference of two networks, can be made as the PLMN access priority of 3G network and be higher than the 2G network, such as the PLMN that 3G network can be set is HPLMN, the PLMN of 2G network is made as VPLMN, and following processes is just the same with situation described in above-mentioned two kinds of networks are operated by same operator.
It is similar that the mode switch process of mode mobile terminal this moment and user manually carry out mode switch, difference only is that the user initiatively selects the application layer menu to notify the communications protocol layers of terminal to initiate mode switch by the user, and the mode switch of under automatic network selection pattern situation, carrying out be communications protocol layers by present mode behind the signal of ferret out mode network, the application layer of notice terminal is initiated mode switch.
Do not satisfy trigger condition if search 3G network signal or relevant parameter, then keep residing in the 2G network, do not carry out mode switch.
Fig. 2 is the particular flow sheet according to the automatic network selection method of the embodiment of the invention.As shown in Figure 2, it may further comprise the steps:
Step S202, when terminal resided in the GSM pattern, idle pulley can periodically be searched for the signal of TD-SCDMA network down;
Step S204, move to the zone of the network coverage of TD-SCDMA as the terminal use after, can search the network of relation signal and measure;
Step S206, the terminal underlying protocol will adjudicate whether satisfy relevant predetermined threshold to parameters such as the RSCP that measures and C/I this moment, and under situation about satisfying condition execution in step S208 and step S210, otherwise under situation about not satisfying condition, execution in step S212;
Step S208 satisfies at measurement parameter under the situation of predetermined threshold, and the terminal underlying protocol will notify the application layer start-up mode to switch;
Step S210 switches to the TD-SCDMA network schemer, will reside in the sub-district of TD-SCDMA after the TD-SCDMA of changing to network schemer to be cut is finished; And
Step S212, if the parameter of measuring does not satisfy predetermined threshold or do not search the network signal of TD-SCDMA, terminal will continue to reside in the GSM network cell, continues periodically to search for the TD-SCDMA network signal under idle pulley.
Fig. 3 is the structured flowchart according to automatic network selection device of the present invention.As shown in Figure 3, the automatic network selection device 300 of 2G network and 3G network mode mobile terminal comprises: search measuring unit 302, be used for residing in the 2G network when mode mobile terminal, and when being in idle pulley, periodically whether search exists 3G network, and in the relevant information that searches the 3G network that measurement searches under the situation of 3G network; And switch unit 304, be used to judge whether the relevant information of the 3G network that measures satisfies predetermined threshold, and determine whether to start the network schemer switching according to judged result.
Above-mentioned automatic network selection device 300 also comprises setup unit, is used under 2G network and 3G network are situation by the different operators running, the PLMN access priority of 3G network is made as be higher than the 2G network.
Wherein, setup unit is made as HPLMN with the PLMN access priority of 3G network, and the PLMN access priority of 2G network is made as VPLMN.
And switch unit 304 does not satisfy under the situation of predetermined threshold in the relevant information of the 3G network that measures, and does not start network schemer and switches, and mode mobile terminal resides in the 2G network.
In addition, switch unit 304 satisfies under the situation of predetermined threshold in the relevant information of the 3G network that measures, whether the time delay that the relevant information of judging 3G network satisfies predetermined threshold satisfies preset time delay, and satisfying under the situation of preset time delay, starting network schemer switches, mode mobile terminal is switched in the 2G network, otherwise, do not start network schemer and switch.
Relevant information comprises received signal code power and carrier/interface ratio.
By the present invention, can make operator according to the actual conditions balance 2G network of network and the traffic density of 3G network, both helped the progressively development of 3G network, also alleviated the active demand of the upgrading 2G of operator net simultaneously.
Simultaneously, because terminal only detects the signal of target inserting technology networks in the network selection process, and do not send signal, so terminal power consumption in the network selection process is very little, and the time that network selection continues is very short, the length of one's sleep when only a little having shortened terminal standby, very little to the influence of the power consumption under the holding state of terminal, can ignore substantially.
And, because terminal is just carried out network selection under idle pulley, that is to say that the terminal of this moment only need receive a spot of system information, do not need paging receiving message, do not need to measure, so can not influence the business of terminal under the GSM pattern.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. the automatic network selection method of 2G network and 3G network mode mobile terminal is characterized in that, comprising:
Step 1, when described mode mobile terminal resides in the described 2G network, and when being in idle pulley, periodically whether search exists described 3G network, and in the relevant information that searches the described 3G network that measurement searches under the situation of described 3G network; And
Step 2 judges whether the relevant information of the described 3G network that measures satisfies predetermined threshold, and determines whether to start the network schemer switching according to judged result.
2. automatic network selection method according to claim 1 is characterized in that, is under the situation about being operated by different operators at described 2G network and described 3G network, and is further comprising the steps of before described step 1:
The PLMN access priority of described 3G network is made as is higher than described 2G network.
3. automatic network selection method according to claim 2 is characterized in that, the PLMN access priority of described 3G network is made as HPLMN, and the PLMN access priority of described 2G network is made as VPLMN.
4. according to each described automatic network selection method in the claim 1 to 3, it is characterized in that, in described step 2,
When the relevant information of the described 3G network that measures does not satisfy described predetermined threshold, do not start described network schemer and switch, described mode mobile terminal resides in the described 2G network, and turns back to described step 1.
5. according to each described automatic network selection method in the claim 1 to 3, it is characterized in that, in described step 2,
When the relevant information of the described 3G network that measures satisfies described predetermined threshold, start described network schemer and switch, described mode mobile terminal is switched in the described 2G network.
6. according to each described automatic network selection method in the claim 1 to 3, it is characterized in that, in described step 2,
When the relevant information of the described 3G network that measures satisfies described predetermined threshold, whether the time delay that the relevant information of judging described 3G network satisfies described predetermined threshold satisfies preset time delay, and satisfying under the situation of described preset time delay, starting described network schemer switches, described mode mobile terminal is switched in the described 2G network, otherwise, do not start described network schemer and switch.
7. automatic network selection method according to claim 1 is characterized in that described relevant information comprises received signal code power and carrier/interface ratio.
8. the automatic network selection device of 2G network and 3G network mode mobile terminal is characterized in that, comprising:
The search measuring unit, be used for residing in described 2G network when described mode mobile terminal, and when being in idle pulley, periodically whether search exists described 3G network, and in the relevant information that searches the described 3G network that measurement searches under the situation of described 3G network; And
Switch unit is used to judge whether the relevant information of the described 3G network that measures satisfies predetermined threshold, and determines whether to start the network schemer switching according to judged result.
9. automatic network selection device according to claim 8, it is characterized in that, also comprise: setup unit, be used under described 2G network and described 3G network are situation by the different operators running, the PLMN access priority of described 3G network is made as is higher than described 2G network.
10. automatic network selection device according to claim 9 is characterized in that, described setup unit is made as HPLMN with the PLMN access priority of described 3G network, and the PLMN access priority of described 2G network is made as VPLMN.
11. each described automatic network selection device in 10 is characterized in that according to Claim 8,
Described switch unit does not satisfy in the relevant information of the described 3G network that measures
Under the situation of described predetermined threshold, do not start described network schemer and switch, described mode mobile terminal resides in the described 2G network.
12. each described automatic network selection device in 10 is characterized in that according to Claim 8,
Described switch unit satisfies under the situation of described predetermined threshold in the relevant information of the described 3G network that measures, and starts described network schemer and switches, and described mode mobile terminal is switched in the described 2G network.
13. each described automatic network selection device in 10 is characterized in that according to Claim 8,
Described switch unit satisfies under the situation of described predetermined threshold in the relevant information of the described 3G network that measures, whether the time delay that the relevant information of judging described 3G network satisfies described predetermined threshold satisfies preset time delay, and satisfying under the situation of described preset time delay, starting described network schemer switches, described mode mobile terminal is switched in the described 2G network, otherwise, do not start described network schemer and switch.
14. automatic network selection device according to claim 8 is characterized in that described relevant information comprises received signal code power and carrier/interface ratio.
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