CN203057539U

CN203057539U - Communication terminal

Info

Publication number: CN203057539U
Application number: CN 201220749678
Authority: CN
Inventors: 孙龙
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2012-12-31
Filing date: 2012-12-31
Publication date: 2013-07-10
Anticipated expiration: 2022-12-31

Abstract

A communication terminal at least supports two user cards. All the user cards are corresponding to at least two network modes. At least one first user card for supporting standby under two or more network modes is in all the user cards. The communication terminal comprises each base-band module corresponding to every network mode. At least one first base-band module for supporting two or more user cards to be a standby state under the network modes corresponding to the base-band module is in all the base-band modules. The communication terminal also comprises an application module, wherein the application module comprises a control unit and a switching unit, the control unit is suitable for outputting control signals when detecting that switching conditions are satisfied, the switching unit is suitable for switching the base-band module communicated with the first user card between the first base-band module and other base-band modules under control of the control signals. According to the technical scheme, smooth switching of the user cards can be realized, network searching efficiency when switching is raised and effects on normal business are reduced.

Description

Communication terminal

Technical field

The utility model relates to the communications field, particularly a kind of communication terminal.

Background technology

Along with the develop rapidly of mechanics of communication, interpersonal information interchange is also more frequent, and a mobile phone can't satisfy people's demand, and the people who especially is engaged in work such as sale, management needs two or three sometimes even more mobile phones could be satisfied the demand reluctantly.And carry so many mobile phones be very much inconvenience, therefore, the multi-card multi-standby mobile phone has appearred on the market.This mobile phone makes the user only need a mobile phone carrier, but a plurality of subscriber identification module (SIM can be installed, Subscriber Identity Module) card or global subscriber identification module (USIM, Universal Subscriber Identity Module) card is compared and is carried a plurality of mobile phones and obviously made things convenient for a lot.

In second generation mobile communication (2G) technology, global system for mobile communications (GSM, Globe System of Mobile Communication) and code division multiple access (CDMA, Code Division Multiple Access) communication system be to use wider mobile communication system in the world.In GSM or cdma communication network, if the user need use a plurality of numbers at a mobile phone, then generally can take following several scheme:

1. many cards are singly treated system: though can connect two or two above SIM/USIM cards simultaneously, but in fact current available (standby and carry out business) have only one, realized the switching of many cards by hardware circuit, generally when start, select, because the influence of protocol stack, the general dynamic switching that can not realize multiple SIM card in working order generally need be restarted cell phone system (mainly being to start mobile phone protocol stack/upper layer software (applications) etc.).

2. multi-card multi-standby system: overcome the limitation that many cards are in the past singly treated system, standby when it can realize multiple SIM/usim card, similar possess the multi-section mobile phone simultaneously, and obviously practicality is greatly enhanced.

Early stage multi-card multi-standby mobile phone, be actually and have many cover systems (being generally two covers), every cover system all comprises radio-frequency module, baseband module and protocol stack separately, adopt the mobile phone of many cover systems can finish real while standby and the conversation of a plurality of numbers really, also can be referred to as the many way systems of multi-card multi-standby.But, shortcoming such as there is the cost height in this mode, power consumption is big and stand-by time is short, it is convenient inadequately to use.The multi-card multi-standby mobile phone that later stage occurs can be described as the multi-card multi-standby single-pass sytem, it compares top many cover systems, only used a cover communication module (comprising radio-frequency module and baseband module), because the upper-layer protocol stack needs collaborative work, so the protocol stack of original many covers independent operating needs to integrate closely, though practical operation is complicated, can realize the multi-card multi-standby effect.General adopt under protocol stack control in turn that paging receiving message and broadcast realize the standbies simultaneously of many cards.

At present, along with popularizing gradually of 3G (Third Generation) Moblie (3G) technology, for example based on Time Division-Synchronous Code Division Multiple Access (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) or Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) the 3G business of technology is carried out in the whole nation, increasing people brings into use 3G mobile, but owing to use the crowd of 2G mobile phone still to occupy the majority after all, therefore in the transition stage of 2G to 3G, realize simultaneously that with a mobile phone standby of 2G and 3G then can seem quite convenient.

Present mobile communications network various modes (standard) is also deposited, as GSM, CDMA, WCDMA etc., there is different selections in each country to network schemer, supports GSM and WCDMA network as some country, but some country only supports cdma network, and the network of some national various pattern has.At this reality, some manufacturer terminal has been developed the communication terminal that can support the multiple network pattern simultaneously, to satisfy the demand of user's obtaining communication service under the multiple network pattern, for example: the two card of CDMA+GSM double-mode communication terminal just can support two subscriber cards to carry out standby and obtaining communication service respectively under cdma network He under the GSM network.Though the two card of existing C DMA+GSM double-mode communication terminal can be supported subscriber card standby under CDMA, the standby under GSM of another subscriber card, but at least also there is following shortcoming: first, even insert the subscriber card that to support CDMA and GSM network simultaneously, when being in when having only regional that CDMA or GSM cover, there is a subscriber card just can't provide communication service, has influence on user's use; Second, the baseband module that subscriber card of service can't be provided and communicate with it generally still can periodically carry out the net of looking under CDMA or the GSM, in order to after finding suitable network, carry out standby, but so not only look for net efficient lower, and increased the power consumption of communication terminal; The 3rd, when the signal quality of the current resident CDMA of subscriber card or GSM network is relatively poor, be difficult to guarantee that subscriber card provides the quality of communication service.

To sum up, when existing many card multi-mode communication terminals cover or be can't be normal resident in the network loss of subscriber card institute standby, be difficult in time realize the standby of this subscriber card, and reduce it and look for the power consumption of bringing in the network process to increase; When the signal quality variation of current residing network, be difficult in time guarantee that subscriber card provides the quality of communication service.

The utility model content

Problem to be solved in the utility model is existing many card multi-mode communication terminals when the network loss of subscriber card institute standby covers or be can't be normal resident, is difficult in time realize the standby of this subscriber card, and reduces power consumption; When the signal quality variation of current residing network, be difficult in time improve the quality that subscriber card provides communication service.

For addressing the above problem, technical solutions of the utility model provide a kind of communication terminal, described communication terminal is supported two subscriber cards at least, there is first subscriber card that is supported in standby under two or more network schemer at least in the corresponding at least two kinds of network schemers of all subscriber cards among all subscriber cards;

Described communication terminal comprises and every kind of each baseband module that network schemer is corresponding, has first baseband module of supporting two or two above subscriber card standbies under baseband module institute map network pattern among all baseband modules at least;

Described communication terminal also comprises application module, described application module comprise be suitable for the control unit that detects the time output control signal that satisfies switching condition and be suitable under the control in described control signal will and the switch unit that between described first baseband module and other baseband modules, switches of the baseband module that communicates of described first subscriber card.

Optionally, described communication terminal also comprises: can connect many clampings mouth of at least two subscriber cards and described first baseband module, described many clampings mouth is supported the hot plug of described first subscriber card.

Optionally, comprise in each baseband module being suitable for supporting connected subscriber card under this baseband module institute map network pattern, to realize the protocol stack of standby that corresponding protocol stack can support at least two subscriber cards to carry out standby under this baseband module institute map network pattern in described first baseband module.

Optionally, described application module also comprises the memory cell that is suitable for the storage networking information table, and described network information table records the information of network institute covering area of every kind of network schemer and the network No. of each network correspondence.

Optionally, two or more baseband module is integrated in the same baseband chip.

Optionally, the network schemer of all subscriber card correspondences comprises among GSM, CDMA, CDMA2000, CDMA20001X, CDMA20001X EVDO, WCDMA, TD-SCDMA, the LTE at least two kinds.

Compared with prior art, technical solutions of the utility model have the following advantages at least:

By expanding first baseband module that at least one supports two or two above subscriber card standbies under baseband module institute map network pattern at many card multi-mode communication terminals, and cooperate at least one first subscriber card that is supported in standby under two or more network schemer, thereby can realize and baseband module taking over seamlessly between described first baseband module and other baseband modules that described first subscriber card communicates;

By above-mentioned communication terminal, when the network loss of subscriber card institute standby covers or is can't be normal resident, or when the signal quality variation of current residing network, can make the network of this subscriber card under other network schemers carry out standby in time, what may run into when reduce switching looks for the net expense and aligns the influence of normal open communication service, also can in time improve the quality that this subscriber card provides communication service.

Description of drawings

Fig. 1 is the structural representation of the communication terminal that provides of the utility model execution mode;

Fig. 2 is the SIM card 1 of the utility model embodiment one and the schematic diagram of SIM card 2 normal standbies;

Fig. 3 is the schematic diagram that the SIM card 1 of the utility model embodiment one switches to standby under the GSM;

Fig. 4 is that the SIM card 1 of the utility model embodiment one is switched back the schematic diagram of standby under the CDMA;

Fig. 5 is the workflow schematic diagram that the SIM card 1 of the utility model embodiment one switches to standby under the GSM;

Fig. 6 is the workflow schematic diagram that the SIM card 1 of the utility model embodiment one is switched back standby under the CDMA;

Fig. 7 is the schematic diagram that the SIM card 2 of the utility model embodiment two switches to standby under the CDMA.

Embodiment

For above-mentioned purpose of the present utility model, feature and advantage can more be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.Set forth detail in the following description so that fully understand the utility model.But the utility model can be different from alternate manner described here and implements with multiple, and those skilled in the art can do similar popularization under the situation of the utility model intension.Therefore the utility model is not subjected to the restriction of following public embodiment.

As stated in the Background Art, when existing many card multi-mode communication terminals cover or be can't be normal resident in the network loss of subscriber card institute standby, be difficult in time realize the standby of this subscriber card, and reduce it and look for the power consumption of bringing in the network process to increase; When the signal quality variation of current residing network, be difficult in time guarantee that subscriber card provides the quality of communication service.The inventor considers, the residing network situation mutation of current institute (for example can be lost covering, normal resident or signal quality variation) subscriber card switches to other and is fit to carry out standby on resident networks (pattern of this network is different from the pattern of institute's residing network before this), when treating that the situation of institute's residing network is recovered (for example find and exist covering and normal resident network or the signal quality of energy to improve) before this, again this subscriber card is switched back former network, so realized and baseband module taking over seamlessly between described first baseband module and other baseband modules that this subscriber card communicates, i.e. switching (can abbreviate the switching of this subscriber card as) between the protocol stack of the corresponding baseband module of this subscriber card, rely on rational switchover policy just can make the network of this subscriber card under other network schemers carry out standby in time again, what may run into when reduce switching looks for the net expense and aligns the influence of normal open communication service, reduce the power consumption of looking in the network process, also can in time improve the quality that this subscriber card provides communication service.

Therefore, the utility model execution mode provides a kind of many card multi-mode communication terminals, and namely described communication terminal is supported two subscriber cards at least, the corresponding at least two kinds of network schemers of all subscriber cards.Fig. 1 is the structural representation of the communication terminal that provides of the utility model execution mode.As shown in Figure 1, there is first subscriber card 10 that is supported in standby under two or more network schemer among all subscriber cards at least; Described communication terminal comprises and every kind of each baseband module that network schemer is corresponding, has first baseband module 20 of supporting two or two above subscriber card standbies under baseband module institute map network pattern among all baseband modules at least; Described communication terminal also comprises application module 30, described application module 30 comprise be suitable for the control unit 301 that detects the time output control signal that satisfies switching condition and be suitable under the control in described control signal will and the switch unit 302 that between described first baseband module 20 and other baseband modules, switches of the baseband module that communicates of described first subscriber card 10.

Need to prove that subscriber card does not generally belong to the part of described communication terminal, but the enforcement of described communication terminal needs the cooperation of subscriber card to realize, therefore figure 1 illustrates the subscriber card corresponding with baseband module.Only indicate first subscriber card among Fig. 1, other subscriber cards that indicate are non-first subscriber card, only indicate first baseband module among Fig. 1, and other baseband modules that indicate are non-first baseband module.When reality was implemented, the quantity of first subscriber card or other subscriber cards all was not limited to 1, and the quantity of first baseband module or other baseband modules also all is not limited to 1.

During concrete enforcement, described communication terminal also comprises many clampings mouth 40 that can connect at least two subscriber cards and described first baseband module 20, and described many clampings mouth 40 is supported the hot plug of described first subscriber card 10.When satisfying switching condition, under the control of control unit 301 described in the described application module 30, by disconnecting the connection between first subscriber card 10 and the current corresponding baseband module after the power down, and with re-power after another baseband module is connected, thereby finish the switching of first subscriber card 10.Because many clampings mouth 40 is supported the hot plug of first subscriber card 10, so in power down or the process that powers on, first subscriber card 10 is connected with first baseband module 20 by many clampings mouth 40 or disconnects in the process that connects, and can not influence the operate as normal with other subscriber cards that are connected with first baseband module 20 by many clampings mouth 40.

Comprise in each baseband module and be suitable for supporting connected subscriber card under this baseband module institute map network pattern, to realize the protocol stack (PS of standby, Protocol Stack), corresponding protocol stack can support at least two subscriber cards to carry out standby under this baseband module institute map network pattern in described first baseband module 20.Subscriber card is realized the standby of the network of this subscriber card under its map network pattern by the control of the protocol stack in the connected baseband module.

During concrete enforcement, described application module 30 also comprises the memory cell (not shown in figure 1) that is suitable for the storage networking information table, and described network information table records the information of network institute covering area of every kind of network schemer and the network No. of each network correspondence.The effect of the described network information table of described cell stores will further specify in the specific embodiment below.

When reality was implemented, described communication terminal is specifically as follows mobile phone or other have the equipment (for example panel computer etc.) of communication function.Described subscriber card can be SIM card, also can be usim card.The network schemer of all subscriber card correspondences can comprise at least two kinds in GSM, CDMA, CDMA2000, CDMA20001X, CDMA20001X EVDO, WCDMA, TD-SCDMA, the Long Term Evolution (LTE, Long Term Evolution).

In addition, when implementing, reality two or more baseband modules can also be integrated in the same baseband chip, for example bimodulus baseband chip, three mould baseband chips etc.

In the utility model execution mode, by expanding first baseband module that at least one supports two or two above subscriber card standbies under baseband module institute map network pattern at many card multi-mode communication terminals, and cooperate at least one first subscriber card that is supported in standby under two or more network schemer, thereby can realize and baseband module taking over seamlessly between described first baseband module and other baseband modules that described first subscriber card communicates.

It will be appreciated by those skilled in the art that, realize that many card all or part of of multi-mode communication terminal are to instruct relevant hardware to finish by program in the above-mentioned execution mode, described program can be stored in the computer-readable recording medium, and described storage medium can be ROM, RAM, magnetic disc, CD etc.

In order to understand the concrete enforcement of above-mentioned communication terminal better, the utility model execution mode describes the subscriber card handoff procedure of described communication terminal again:

When satisfying first switching condition, under the control of the control signal that described control unit is exported, described first subscriber card that described switch unit carries out standby with the network under first network schemer switches to described first baseband module and communicates, and carries out standby to realize the network of described first subscriber card under described first baseband module institute map network pattern;

When satisfying second switching condition, under the control of the control signal that described control unit is exported, described first subscriber card is switched back described switch unit and the corresponding baseband module of described first network schemer communicates, and carries out standby to realize the network of described first subscriber card under described first network schemer.

In the utility model execution mode, the default standby pattern that described first network schemer is described first subscriber card, namely after described communication terminal start, first subscriber card can be looked for net under first network schemer, network at this network schemer carries out standby, when satisfying described first switching condition, carry out standby by switching with the network that is implemented in other network schemers again.

In addition, described first switching condition be described first subscriber card disconnect with the corresponding baseband module of described first network schemer between be connected, and switch to the trigger condition of described first baseband module of connection; Described second switching condition be described first subscriber card disconnect with described first baseband module between be connected, switch back the trigger condition of the corresponding baseband module of described first network schemer of connection; Described first switching condition and second switching condition are all determined according to the actual conditions of current network, namely in the present embodiment, switching condition such as first switching condition and second switching condition all refers to according to the actual conditions of current network and trigger condition that subscriber card is switched as described.

With specific embodiment above-mentioned communication terminal and subscriber card handoff procedure thereof are elaborated below.

Embodiment one

In the present embodiment, being specially two card dual-mode handsets with described communication terminal is that example describes its subscriber card handoff procedure, wherein, two kinds of network schemers are respectively CDMA and GSM, two subscriber cards are respectively SIM card 1 and SIM card 2, and under the normal ideal case of two cards, SIM card 1 is carried out standby by its corresponding baseband module at cdma network, CDMA is first network schemer that SIM card 1 is carried out standby, and SIM card 2 is carried out standby by its corresponding baseband module at the GSM network.Suppose that SIM card 1 is first subscriber card, SIM card 2 is other subscriber cards, be SIM card 2 right and wrong first subscriber cards, the baseband module of GSM correspondence (abbreviating the GSM baseband module as) is first baseband module, the baseband module of CDMA correspondence (abbreviating the CDMA baseband module as) is other baseband modules, and namely the CDMA baseband module is non-first baseband module.

The normal standby of SIM card 1 and SIM card 2 as shown in Figure 2, because subscriber card is by the control of the protocol stack in the connected baseband module, realize the standby of the network of this subscriber card under its map network pattern, therefore in Fig. 2, represent the CDMA baseband module with the CDMA protocol stack, with gsm protocol stack representation GSM baseband module, under the control of application module, make SIM card 1 standby in cdma network by the CDMA protocol stack, make SIM card 2 standbies in the GSM network by the gsm protocol stack.

In the present embodiment, described first switching condition comprises: the network loss of described first subscriber card under described first network schemer covers or can't be normally resident; Described second switching condition comprises: determine to find the network that exists under described first network schemer that covers.Particularly, first switching condition comprises: the cdma network that SIM card 1 is carried out standby is lost and is covered or can't be normally resident, described can't be normally resident can be called again limited resident, for example reside on the forbidding public land mobile network (FPLMN, Forbidden Public Land Mobile Network); Second switching condition comprises: determine to find the cdma network that has covering.

The basic principle of switching according to frame structure and the SIM card of the two card of above-mentioned CDMA+GSM double-mode communication terminal is as can be known: the cdma network that carries out standby when SIM card 1 is lost and is covered or can't be normally resident, then SIM card 1 is switched to standby under the GSM network, specifically can SIM card 1 be connected with the GSM baseband module by the mode of hot plug; There is a cdma network that covers when determining to find, and by periodically looking for net to find can be normally resident cdma network, again SIM card 1 switched back standby under this cdma network.

SIM card 1 switches to that standby sees also Fig. 3 under the GSM, dotted line represents that SIM card 1 accepts the control of gsm protocol stack after switching among Fig. 3, the standby under the GSM network of SIM card 1 this moment, and the gsm protocol stack is supported double-card dual-standby, therefore SIM card 2 still can be under the control of gsm protocol stack standby in the GSM network, being SIM card 2 switches under the GSM after the standby in SIM card 1, and its communication service is also unaffected.

SIM card 1 switches back that standby sees also Fig. 4 under the CDMA, in order to embody SIM card 1 in the switching of gsm protocol stack and CDMA protocol stack, dotted line represents that SIM card 1 switches back under the CDMA before the standby among Fig. 4, by standby under the control of gsm protocol stack in the GSM network, and heavy line represents that SIM card 1 switches back standby under the CDMA among Fig. 4, and this moment, SIM card 1 was accepted the control of CDMA protocol stack.SIM card 2 is switched back in the process of standby under the CDMA in SIM card 1, and its communication service still can not be affected.

Yet when reality was implemented, how described control unit specifically controls described switch unit was carried out the SIM card switching, also needs to have a perfect switchover policy, and topmost problem comprises:

(1) whether SIM card 1 is necessary standby under the GSM network;

(2) switch under the GSM network after the standby when SIM card 1, how to carry out the net of looking under the CDMA, and how to judge whether switch back to cdma network.

Present embodiment proposes the SIM card switchover policy between CDMA and GSM, can solve above-mentioned two problems.

Solution thinking at problem (1):

The inventor considers, when SIM card 1 can't be when cdma network carries out standby, whether be necessary standby under the GSM network, this need consider whether to exist can be normally resident GSM network, if there is no, then SIM card 1 switches to that standby also seems meaningless under the GSM network, and still needs to switch back cdma network, has also increased handover overhead.Have only when judging can be the normally resident GSM network of existence, again SIM card 1 is switched to standby under the GSM network, could reduce handover overhead and align the influence of normal open communication service.

Therefore, in the present embodiment, described first switching condition also comprises: other subscriber cards that described first baseband module is supported have found the network under described first baseband module institute map network pattern, and this network can be normally resident.Particularly, namely described first switching condition also comprises: SIM card 2 has found can be normally resident GSM network.

In addition, in the present embodiment, when not satisfying described first switching condition, and other subscriber cards of supporting of described first baseband module do not find the network under described first baseband module institute map network pattern, and then described first subscriber card is periodically looked for net under described first network schemer.Particularly, the cdma network that carries out standby when SIM card 1 is lost and is covered or can't be normally resident, and SIM card 2 do not find can be normally resident GSM network, and then SIM card 1 periodicity under CDMA is looked for net.

According to above-mentioned solution thinking, at the solution of problem (1):

Start acquiescence SIM card 1 is looked for net under CDMA, SIM card 2 is looked for net under GSM.When SIM card 1 can not find net or can't obtain the proper communication service under CDMA, judge whether SIM card 2 finds the GSM network.If SIM card 2 finds the GSM network, that just switches to SIM card 1 under this GSM network and carries out standby, if SIM card 2 also can not find the GSM network, still standby under CDMA of SIM card 1 so, and periodically look for net, carry out standby up to finding cdma network that can be resident or when SIM card 2 finds the GSM network, switching under this GSM network.

Fig. 5 shows the concrete workflow that SIM card 1 switches to standby under the GSM, comprising:

Step S501, SIM card 1 is looked for net under the cdma network pattern;

Step S502 judges that SIM card 1 whether can normal resident cdma network, is execution in step S503 then, otherwise execution in step S504;

Step S503, SIM card 1 standby is under cdma network;

Step S504 judges whether SIM card 2 finds the GSM network, is execution in step S505 then, otherwise jumps to step S501;

Step S505, SIM card 1 switches to standby under the GSM network.Behind the step S505, whole flow process finishes.

Solution thinking at problem (2):

After SIM card 1 is switched to the GSM network, also want in good time switchback cdma network, this just needs efficient strategy more.The inventor considers, before determining that cdma network can be resident, if directly SIM card 1 is switched back under the cdma network pattern and looks for net, may be still can not normal resident cdma network, so not only increased handover overhead, what is more important, SIM card 1 can't be obtained the proper communication service between transfer period, if and still standby can also get access to the proper communication service at least under the GSM network.Therefore, before SIM card 1 is switched back to cdma network, need at first to determine whether current area may exist cdma network to cover, find can be normally resident cdma network then.

At problem (2), two concrete solutions are proposed in the present embodiment:

A), utilize prior information to judge whether current area may exist cdma network to cover;

B), the no card of realizing the CDMA baseband module is looked for net.

Just can judge efficiently and accurately by such scheme whether SIM card 1 can switch back cdma network.The specific descriptions of these two schemes are as follows:

Scheme a) can comprise: the information of the subscriber card residing network of supporting based on first baseband module, by the default network information table of application module retrieval, described network information table records the information of the network institute covering area under every kind of network schemer and the network No. of each network correspondence; If judge that by the information in the described network information table may there be the network under described first network schemer in current area, then determine to find the network that exists under described first network schemer that covers.Described network information table can really upgrade by the network server end online updating or according to the anastomose of looking for of described communication terminal.

In addition, in the present embodiment, if judge that by the information in the described network information table can not there be the network under described first network schemer in current area, then after described first subscriber card switches to described first baseband module, close the corresponding baseband module of described first network schemer.

Particularly, the prior information of scheme described in a) refers to the information that records in the described network information table, utilizes prior information can judge whether current area may exist cdma network.In the present embodiment, the application module (AP module) of the two card of CDMA+GSM double-mode communication terminal can be safeguarded a cdma network information table in advance, and there be country's (distinguishing with national code) and the corresponding network No. that cdma network covers in record in the table.In the specific implementation, according to the resident GSM network that SIM card 2 reports, can judge present located country by national code, retrieve the cdma network information table then.If there is cdma network in current country, namely determine to find to have the cdma network that covers, so just can look for net at the CDMA baseband module, otherwise just can after SIM card 1 switches to the standby of GSM network, close the CDMA baseband module, so both improved and looked for net efficient, reduced power consumption again.

This cdma network information table both can pass through the network server end online updating, also can really upgrade according to the actual anastomose of looking for of terminal.The equipment supplier is responsible for collecting the cdma network change in information, and updates to the webserver, so that communication terminal can in time obtain the switchover policy that up-to-date cdma network information table is used for SIM card.

Need to prove, only need the cdma network information table can judge whether current area may exist cdma network in the present embodiment, in other embodiments, also can be in application module stored record the network information table of the network No. of the information of every kind of network institute covering area under the network schemer and each network correspondence is arranged, this network information table can be thought the comprehensive of each network schemer institute map network resource table, more can be applicable to the situation that has a plurality of first subscriber cards and first baseband module.

Scheme b) the no card that relates to the CDMA baseband module is looked for net.As previously mentioned, if may there be cdma network in current country, application module still will be controlled the CDMA baseband module and periodically carries out the net of looking under the CDMA so.But this participation of looking for net can not need SIM card 1 is directly looked for net under no card state, wait to find the cdma network that SIM card 1 can be resident after, SIM1 is switched to carry out standby under the CDMA again.Can look in the network process at CDMA like this, the normal standby of assurance SIM1 can normally be carried out various communication services under GSM.

In the present embodiment, a) only determine and to find the cdma network that exist to cover by scheme, may there be the covering of cdma network in current area in other words, finds can be normally resident cdma network but also need to wait, and SIM card 1 could be switched back and carry out standby under the cdma network.

Therefore, in the present embodiment, described second switching condition also comprises: find the network under can be normally resident described first network schemer; When satisfying second switching condition, under the control of the control signal that described control unit is exported, described first subscriber card is switched back described switch unit and the corresponding baseband module of described first network schemer communicates, to realize that described first subscriber card can comprise in the concrete course of work that the network under described first network schemer carries out standby: if find network under described first network schemer that exist to cover, then periodically carry out the net of looking under described first network schemer by the corresponding baseband module of described first network schemer; When find can be resident described first network schemer under network after, described first subscriber card switched back with the corresponding baseband module of described first network schemer communicate, and carry out standby at this network.

In other embodiments, second switching condition also can only comprise: determine to find the network that exists under described first network schemer that covers.Do not carry out the no card of other baseband modules this moment and look for net, but when described second switching condition satisfies, under the control of the control signal that described control unit is exported, described first subscriber card is switched back described switch unit and the corresponding baseband module of described first network schemer communicates, to realize that described first subscriber card comprises in the concrete course of work that the network under described first network schemer carries out standby: if find the network that exists under described first network schemer that covers, then described first subscriber card is switched to the corresponding baseband module of described first network schemer and communicate, under described first network schemer, periodically look for net by described first subscriber card, until find can be resident described first network schemer under network, and carry out standby at this network.

To sum up, comprise a) and b) SIM card 1 of two kinds of schemes switch back cdma network from the GSM network concrete workflow as shown in Figure 6, comprising:

Step S601, SIM card 1 and SIM card 2 standbies are obtained current national cdma network coverage condition of living in by the retrieval network information table under the GSM network;

According to the current of living in national cdma network coverage condition that obtains, execution in step S602 judges whether to exist cdma network, is execution in step S603 then, otherwise execution in step S604;

Step S603, CDMA baseband module do not have card and look for net;

Step S604, SIM card 1 still standby is closed the CDMA baseband module under the GSM network;

After the step S603, carrying out S605, judge whether to find the SIM card 1 can resident cdma network, be execution in step S607 then, otherwise execution in step S606;

Step S606, SIM card 1 is standby under the GSM network still, and the CDMA baseband module is periodically looked for net; Behind the step S606, jump to step S605, namely when the judged result of step S605 is "No", step S605 and step S606 are the processes that circulation is carried out, and are "Yes" until the judged result of step S605, namely find the SIM card 1 can resident cdma network;

Step S607, SIM card 1 switches to standby under the cdma network.Behind the step S607, whole flow process finishes.

In the present embodiment, judge current region according to the GSM network and whether may have cdma network, can realize dynamically opening or closing the net of looking for of CDMA baseband module, look for net efficient thereby can improve, reduce the subscriber card switching frequency, provide the proper communication service to the user as far as possible, improved user's experience, also reduced power consumption simultaneously.

Need to prove, present embodiment is to be the subscriber card handoff procedure that example is implemented described communication terminal with two card double-mode communication terminals, and wherein only having a card (SIM card 1) is first subscriber card, and only having a baseband module (GSM baseband module) is first baseband module.In other embodiments, SIM card 1 and SIM card 2 can be first subscriber card, GSM baseband module and CDMA baseband module also can be first baseband module, and at this moment, SIM card 1 or SIM card 2 all can be implemented between GSM baseband module and the CDMA baseband module and take over seamlessly.In addition, when many cards multi-mode communication terminal has first subscriber card more than two, and when having more than two first baseband module, its concrete enforcement still can be carried out with reference to the associated description in the present embodiment, no longer launches to describe herein.

Embodiment two

In the present embodiment, still to be specially two card dual-mode handsets be example that the handoff procedure of subscriber card is described with described communication terminal, wherein, two kinds of network schemers are respectively CDMA and GSM, two subscriber cards are respectively SIM card 1 and SIM card 2, and under the normal ideal case of two cards, SIM card 1 is carried out standby by its corresponding baseband module at cdma network, CDMA is first network schemer that SIM card 1 is carried out standby, and SIM card 2 is carried out standby by its corresponding baseband module at the GSM network.Suppose that SIM card 1 and SIM card 2 are first subscriber card, the baseband module (abbreviating the CDMA baseband module as) of the baseband module of GSM correspondence (abbreviating the GSM baseband module as) and CDMA correspondence is first baseband module.

The difference of present embodiment and embodiment one is that also switching condition is different.In the present embodiment, described first switching condition comprises: the signal measurements that the network of described first subscriber card under described first network schemer obtains is lower than predetermined threshold value; Described second switching condition comprises: find signal measurements more than or equal to the network under described first network schemer of described predetermined threshold value.Described predetermined threshold value is the critical value that the reflection communication terminal is kept proper communication service desired signal quality, can determine according to actual conditions, when signal measurements is lower than described predetermined threshold value, show that the current demand signal difficult quality keeps proper communication, need carry out the switching of described first subscriber card this moment, if detect signal measurements more than or equal to described predetermined threshold value, illustrate that then the signal quality of the network under first network schemer has improved afterwards.

In the present embodiment, two card double-mode communication terminal carrying CDMA and gsm protocol stack can reside on GSM and the cdma network two cards simultaneously.When application module measures cdma network signal variation, can transfer the SIM card 1 of its control to the gsm protocol stack and take over, the two card of GSM protocol stack can be with the SIM card 1 resident better quality of signal GSM network of newly taking over of going up; In like manner, when GSM network signal variation, the two card of CDMA protocol stack also can successfully be taken over the SIM card of originally being controlled by the gsm protocol stack 2.When application module measures the CDMA signal quality when improving, the SIM card 1 that the gsm protocol stack is taken over can be returned the CDMA protocol stack again and control; In like manner, when the two cards of CDMA protocol stack control, and the GSM network signal can be given back the SIM card 2 that the CDMA protocol stack is taken over the control of gsm protocol stack when improving.

Under normal circumstances, two SIM card all can normally reside in corresponding network, can be with reference to figure 2.During concrete enforcement, gsm protocol stack and CDMA protocol stack all are two card protocol stacks, during initial the start, SIM card 1 and SIM card 2 are placed on position separately respectively, start SIM card and protocol stack by corresponding AT order (Attention Commands), two SIM cards are the resident network of going up correspondence separately.

When cdma network signal variation, application module disconnects the CDMA protocol stack by issuing the AT order with SIM card 1, and is connected to the gsm protocol stack.Can be with reference to figure 3, SIM card 1 is connected to the gsm protocol stack, and application module issues the AT order in respective channel and starts SIM card and protocol stack.

If during GSM network signal elder generation variation, then in the same way SIM card 2 is switched to the CDMA protocol stack, as shown in Figure 7.

When two SIM cards all when the gsm protocol stack is worked, and the CDMA signal is when becoming better, application module can be selected SIM card 1 is switched back the CDMA protocol stack, disconnect SIM card 1 from the gsm protocol stack this moment earlier, be connected to the CDMA protocol stack, can be by the hot-swappable control of SIM card, become structure as shown in Figure 2 this moment.If this moment, GSM signal quality variation can continue SIM card 2 is also switched to the CDMA protocol stack, as shown in Figure 7.

If when CDMA and GSM network signal quality are all very poor, then can handle according to the normal signal difference.

When two SIM cards during all at the CDMA protocol stack, and the GSM network signal equally as above carries out handover operation when better.

When a SIM card is transferred to the process of gsm protocol stack from the CDMA protocol stack, the original SIM card business of gsm protocol stack is not affected; When the gsm protocol stack has 2 SIM cards operations and when wherein a card will be returned the CDMA protocol stack and takes over, the business of another SIM card of gsm protocol stack was unaffected equally.

To sum up, the communication terminal that provides by present embodiment, when the signal quality variation of current residing network, rely on rational switchover policy can make the network of this subscriber card under other network schemers carry out standby in time, minimizing may run into looks for the net expense and aligns the influence of normal open communication service, also can in time improve the quality that this subscriber card provides communication service.

The enforcement of the subscriber card handoff procedure of the subscriber card handoff procedure reference example one of the described communication terminal of present embodiment repeats no more herein.

Though the utility model with preferred embodiment openly as above; but it is not to limit the utility model; any those skilled in the art are not in breaking away from spirit and scope of the present utility model; can utilize method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made possible change and modification; therefore; every content that does not break away from technical solutions of the utility model; to any simple modification, equivalent variations and modification that above embodiment does, all belong to the protection range of technical solutions of the utility model according to technical spirit of the present utility model.

Claims

1. communication terminal, described communication terminal is supported two subscriber cards at least, and the corresponding at least two kinds of network schemers of all subscriber cards is characterized in that, at least there is first subscriber card that is supported in standby under two or more network schemer among all subscriber cards

2. communication terminal according to claim 1 is characterized in that, also comprises many clampings mouth that can connect at least two subscriber cards and described first baseband module, and described many clampings mouth is supported the hot plug of described first subscriber card.

3. communication terminal according to claim 1, it is characterized in that, comprise in each baseband module being suitable for supporting connected subscriber card under this baseband module institute map network pattern, to realize the protocol stack of standby that corresponding protocol stack can support at least two subscriber cards to carry out standby under this baseband module institute map network pattern in described first baseband module.

4. communication terminal according to claim 1, it is characterized in that, described application module also comprises the memory cell that is suitable for the storage networking information table, and described network information table records the information of network institute covering area of every kind of network schemer and the network No. of each network correspondence.

5. communication terminal according to claim 1 is characterized in that, two or more baseband modules are integrated in the same baseband chip.

6. communication terminal according to claim 1 is characterized in that, the network schemer of all subscriber card correspondences comprises at least two kinds among GSM, CDMA, CDMA2000, CDMA20001X, CDMA20001X EVDO, WCDMA, TD-SCDMA, the LTE.