CN101765186A - Dual-mode mobile phone and method for selecting networks automatically thereof - Google Patents
Dual-mode mobile phone and method for selecting networks automatically thereof Download PDFInfo
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- CN101765186A CN101765186A CN200810187509A CN200810187509A CN101765186A CN 101765186 A CN101765186 A CN 101765186A CN 200810187509 A CN200810187509 A CN 200810187509A CN 200810187509 A CN200810187509 A CN 200810187509A CN 101765186 A CN101765186 A CN 101765186A
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Abstract
The invention discloses a dual-mode mobile phone and a method for selecting networks automatically thereof. The method comprises the following steps that: the dual-mode mobile phone reads a value of signal quality of a current WIFI network when IP application is started or in the process of performing the IP application; if judging that the value of the signal quality of the WIFI network is less than a set first threshold value, the dual-mode mobile phone reads a value of the signal quality of a current EDGE network; and if judging that the value of the signal quality of the EDGE network is more than or equal to a set second threshold value, the dual-mode mobile phone selects the EDGE network. The method solves the problem that the dual-mode mobile phone cannot select the WIFI network and the EDGE network automatically under the condition that a network side keeps constant, and can realize the automatic switchover of the dual-mode mobile phone between the WIFI network and the EDGE network.
Description
Technical field
The present invention relates to field of mobile communication, more specifically relate to a kind of dual-mode handset and select the method for network automatically.
Background technology
Along with cellphone subscriber's quantity and to the surge of communication bandwidth requirements, original GSM (global system for mobile communications) communication network has been difficult to satisfy, so gsm wireless service release EDGE (Enhanced Datarates for Global Evolution faster, the enhanced data gsm environment) network arises at the historic moment, and develops maturation rapidly; On the other hand, the two-forty local area network (LAN) is also broken through wired restriction already and has been produced WLAN (wireless local area network), and WIFI (Wireless Fidelity, WLAN (wireless local area network) 802.11b standard) is a kind of in the numerous standards of WLAN (wireless local area network).The fusion of " mobile broadbandization " and " broadband mobile " is the inevitable outcome of Communication Development, support the bimodulus EDGE/WIFI mobile phone of GSM/EDGE network and WIFI network simultaneously, carrying out mobile Internet IP (Internet Protocol) application (as web page browsing, IP phone, online chatting etc.) time, if utilize the WIFI network then can bring at a high speed to the user, cheap experience, if what utilize that EDGE network then brings the user is that speed is relatively low, but the higher relatively continuity of rate is experienced preferably, thereby integrated EDGE and WIFI become the focus that industry is paid close attention on the mobile phone.
Simultaneously, because AP (the Access Point of WIFI network, access point or focus) coverage is more much smaller than the base station range under the EDGE network, when carrying out the IP application, must dynamically resolve and select which network to carry, otherwise can't make full use of two kinds of networks of EDGE, WIFI advantage separately as using.
Yet, also lack simple and effective IP application changing method in the prior art and realize that dual-mode handset automaticallyes switch between WIFI and EDGE network, the network selecting method of existing dual-mode handset, main by two kinds of methods: as manually to select, but the basic connectedness of this method can't guarantee, reduces satisfaction of users greatly; Automatically select, but must do transformation, as Session Initiation Protocol (session initiation protocol) being expanded etc. to the equipment of existing network.
In sum, how to keep under the constant situation of conventional network equipment, the realization dual-mode handset is selected WIFI and EDGE network automatically, becomes problem demanding prompt solution.
Summary of the invention
Technical problem to be solved by this invention provides a kind of dual-mode handset and selects the method for network automatically, solved under the situation that network side remains unchanged, the realization dual-mode handset is selected the problem of WIFI and EDGE network automatically, and can realize the automatic switchover of dual-mode handset between WIFI and EDGE network.
In order to address the above problem, the invention provides the method that a kind of dual-mode handset is selected network automatically, comprise,
Dual-mode handset is when starting Internet Protocol IP and use or carry out reading the value of the signal quality of current wireless local area network standard WIFI network in the process that IP uses;
Described dual-mode handset is if the value of the signal quality of the described WIFI network of judgement less than the first threshold of setting, then reads the value of the signal quality of current enhanced data global system for mobile communications environment EDGE network;
Described dual-mode handset if the value of signal quality of judging described EDGE network more than or equal to second threshold value of setting, then described dual-mode handset is selected described EDGE network.
Further, said method can comprise that also described dual-mode handset is not less than the first threshold of setting if judge the value of the signal quality of described WIFI network when starting the IP application, and then described dual-mode handset is selected the WIFI network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is not the WIFI network, then described dual-mode handset switches to the WIFI network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is the WIFI network, then described dual-mode handset keeps being connected with the WIFI network of network.
Further, said method also can comprise, described dual-mode handset is when starting IP and use, if the value of signal quality of judging described EDGE network is more than or equal to second threshold value of setting, then described dual-mode handset is selected described EDGE network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the network that the value of the signal quality of described EDGE network is used more than or equal to second threshold value and the current IP of setting is not an EDGE network, then described dual-mode handset switches to EDGE network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the network that the value of the signal quality of described EDGE network is used more than or equal to second threshold value and the current IP of setting is an EDGE network, then described dual-mode handset keeps being connected with the network of described EDGE network.
Further, said method can comprise that also described dual-mode handset then obtains the IP address, and revises default route and point to the WIFI network interface if setting up the network of WIFI connects, and wherein if exist EDGE to connect, then closes this EDGE and connects.
Further, said method can comprise that also described dual-mode handset then obtains the IP address, and revises default route and point to the EDGE network interface if setting up the network of EDGE connects, and wherein if exist WIFI to connect, then closes this WIFI and connects.
Further, said method can comprise that also the value of the signal quality of the current WIFI that described dual-mode handset reads and two networks of EDGE is values of the signal quality received signal intensity indication of current WIFI and two networks of EDGE.
The present invention also provides a kind of dual-mode handset, comprises, and network signal quality monitoring modular, network selection module and network selecting Executive Module, wherein,
Described network signal quality monitoring modular, be used for when described dual-mode handset starts Internet Protocol IP application or in the process of carrying out the IP application, obtain the value of the signal quality of current wireless local area network standard WIFI and two networks of enhanced data global system for mobile communications environment EDGE, and send to described network judgement selection module;
Described network is judged the selection module, be used for value according to the signal quality of the described WIFI network that receives, if the value of the signal quality of the described WIFI network of judgement is less than the first threshold of setting, then according to the value of the signal quality of the described EDGE network that receives, if the value of the signal quality of the described EDGE network of judgement is more than or equal to second threshold value of setting, then described dual-mode handset is selected EDGE network, and the sign of the EDGE network selected is sent to described network selecting Executive Module;
Described network selecting Executive Module is used for the sign according to the described EDGE network that receives, and is connected with described EDGE network foundation or maintenance network.
Further, above-mentioned dual-mode handset also can comprise, described network is judged the selection module, also be used for when described dual-mode handset starts the IP application, be not less than the first threshold of setting if judge the value of the signal quality of described WIFI network, perhaps carry out in the process of IP application at described dual-mode handset, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is not the WIFI network, then select the WIFI network, and the sign of the WIFI network selected is sent to described network selecting Executive Module;
Described network selecting Executive Module also is used for the sign according to the described WIFI network that receives, and sets up network with described WIFI network and is connected.
Further, above-mentioned dual-mode handset also can comprise, described network is judged the selection module, also be used for carrying out the process that IP uses at described dual-mode handset, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is the WIFI network, then select the WIFI network, and the sign of the WIFI network selected is sent to described network selecting Executive Module;
Described network selecting Executive Module also is used for the sign according to the described WIFI network that receives, and keeps being connected with described WIFI network of network.
Further, above-mentioned dual-mode handset also can comprise, described network selecting Executive Module is according to the sign of the described WIFI network that receives, setting up network with described EDGE network is connected and is meant, described network selecting Executive Module is set up WIFI and is connected, and obtains the IP address, and revises default route and point to the WIFI network interface, wherein, then close this EDGE and connect if exist EDGE to connect;
Described network selecting Executive Module is according to the sign of the described EDGE network that receives, setting up network with described EDGE network is connected and is meant, described network selecting Executive Module is set up EDGE and is connected, obtain the IP address, and revise default route and point to the EDGE network interface, wherein, then close this WIFI and connect if exist WIFI to connect.
Further, above-mentioned dual-mode handset can comprise that also the value of the signal quality of the current WIFI that described network signal quality monitoring modular obtains and two networks of EDGE is values of the signal quality received signal intensity indication of current WIFI and two networks of EDGE.
Compared with prior art, use the present invention, utilize existing network, can realize that dual-mode handset selects WIFI and EDGE network automatically, and can realize the automatic switchover of dual-mode handset between WIFI and EDGE network, fully the two-forty of performance WIFI network, the advantage of low rate, can bring into play the wide continuity advantage of bringing that covers of EDGE network again, have higher realistic meaning.
Description of drawings
Fig. 1 is the flow chart of IP application data transmission of the present invention;
Fig. 2 is the flow chart that dual-mode handset of the present invention is selected network automatically;
Fig. 3 is the flow chart that dual-mode handset of the present invention is selected the WIFI network;
Fig. 4 is the flow chart that dual-mode handset of the present invention is selected EDGE network.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, when dual-mode handset carries out IP when using, two kinds of situations may occur, a kind of is mutual IP data between mobile phone and server, and as the mobile phone browsing page etc., its application shows as client/server model; Another situation is mutual IP data between mobile phone and mobile phone, as IP phone, online chatting etc., its application shows as end-to-end model, and in fact no matter be IP phone or online chatting, two ends all come transfer to finish by server, and it uses performance or client/server model.
Use the data of sending and after TCP (transmission control protocol)/UDP (User Datagram Protoco (UDP)) module is handled, submit to the IP module when dual-mode handset starts or carry out IP, which network interface the default IP route table item of IP module searches sends from the specified data message.
When the routing inquiry result sends from the ppp0 network interface, (as shown in table 1), then the IP message is routed to the EDGE wireless module, enters EDGE packet domain and plurality of data network through air interface, finally is transferred to far-end server;
If mobile phone uses Point-to-Point Protocol (abbreviating ppp protocol as, point-to-point protocol) to surf the Net, then this network connection realizes by network interfaces such as ppp0 exactly.
Table 1:
| ??Destination | ??Gateway | ??Genmask | ??Flags | ??Metric | ??Ref | ??Use | ??Iface |
| ??10.0.0.1 | ??* | ??255.255.255.255 | ??UH | ??0 | ??0 | ??0 | ??ppp0 |
| ??default | ??10.0.0.1 | ??0.0.0.0 | ??UG | ??0 | ??0 | ??0 | ??ppp0 |
When the routing inquiry result is that (the eth0 network interface is a virtual network interface from the eth0 network interface, be the network interface that is provided with by software) send, (as shown in table 2), then the IP message is routed to the WIFI wireless module, enter WIFI focus and plurality of data network through air interface, finally be transferred to far-end server;
Table 2:
| ??Destination | ??Gateway | ??Genmask | ??Flags | ??Metric | ??Ref | ??Use | ??Iface |
| ??192.168.0.0 | ??* | ??255.255.255.0 | ??U | ??0 | ??0 | ??0 | ??eth0 |
| ??default | ??192.168.0.30 | ??0.0.0.0 | ??UG | ??0 | ??0 | ??0 | ??eth0 |
Server is to the data flow of mobile phone direction, according to top process, by that analogy.
The support of the automatic selection network function of dual-mode handset of the present invention is provided with relevant with network selecting, its flow process is as follows: show man-machine interface is set, the user is provided with the network selecting value on man-machine interface, the network selecting value of setting is 1 to express support for automatic selection WIFI or EDGE network, be set to 2 expressions and only select the WIFI network, the value of setting is that EDGE network is only selected in 3 expressions, the default value that dispatches from the factory is 1, promptly support from WIFI and EDGE, to select automatically the network an of the best to carry the IP application, the network selecting value can be deposited in variable u8NetSwitch, and be saved in memory.
When the user starts the IP application, at first read the variable u8NetSwitch of setting, judge the u8NetSwitch value, if 1, then select network automatically, last till that the user stops withdrawing from when IP uses; If 2, then select the WIFI network; If 3, then select EDGE network.
Main design of the present invention is: dual-mode handset is being selected under the pattern of network automatically, wherein the WIFI network has higher preoption than EDGE network, when dual-mode handset starts IP and uses or carry out in the process that IP uses, read the value of the signal quality of current WIFI network, if the value of the signal quality of the described WIFI network of judgement is less than the first threshold of setting, then read the value of the signal quality of current EDGE network, if the value of the signal quality of the described EDGE network of judgement is more than or equal to second threshold value of setting, then described dual-mode handset is selected described EDGE network, sets up or the connection of maintenance network.
The value of the signal quality of the current WIFI that described dual-mode handset reads and two networks of EDGE is signal quality RSSI (Received Signal StrengthIndicator, the indication of received signal intensity) values of current WIFI and two networks of EDGE.
Described dual-mode handset is not less than the first threshold of setting if judge the value of the signal quality of described WIFI network when starting the IP application, then described dual-mode handset is selected the WIFI network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is not the WIFI network, then described dual-mode handset switches to the WIFI network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is the WIFI network, then described dual-mode handset keeps being connected with the WIFI network of network.
Described dual-mode handset is in the process of carrying out the IP application, if judge that the network that the value of the signal quality of described EDGE network is used more than or equal to second threshold value and the current IP of setting is an EDGE network, then described dual-mode handset maintenance is connected with the network of EDGE network.
Described dual-mode handset is when starting IP and use or carry out in the process that IP uses, if the value of the signal quality of judgement EDGE network is less than second threshold value of setting, then the WIFI network does not satisfy the condition that network is connected with EDGE network, and described dual-mode handset finishes the flow process that network connects.
First threshold can be 1/5th the value of WIFI network peak signal quality RSSIwifi_max, and the present invention does not limit this.
Second threshold value can be 2/5ths the value of EDGE network peak signal quality RSSIedge_max, and the present invention does not limit this.
Wherein, dual-mode handset is automatically being selected under the pattern of network, connects if set up the network of WIFI, then obtain the IP address, revise default route point to WIFI network interface (being the eth0 interface), if exist the EDGE connection closed it; Connect if set up the network of EDGE, then set up PPP and connect, obtain the IP address, revise default route and point to EDGE network interface (being the ppp0 interface), if exist the WIFI connection closed it.Network selecting is finally summed up in the point that the renewal of default IP route, shows as network and switches.
Dual-mode handset of the present invention comprises, network signal quality monitoring modular, network selection module and network selecting Executive Module, wherein,
Described network signal quality monitoring modular, be used for when described dual-mode handset starts Internet Protocol IP application or in the process of carrying out the IP application, obtain the value of the signal quality of current wireless local area network standard WIFI and two networks of enhanced data global system for mobile communications environment EDGE, and send to described network judgement selection module;
Described network is judged the selection module, be used for value according to the signal quality of the described WIFI network that receives, if the value of the signal quality of the described WIFI network of judgement is less than the first threshold of setting, then according to the value of the signal quality of the described EDGE network that receives, if the value of the signal quality of the described EDGE network of judgement is more than or equal to second threshold value of setting, then described dual-mode handset is selected EDGE network, and the sign of the EDGE network selected is sent to described network selecting Executive Module;
Described network is judged the selection module, also be used for when described dual-mode handset starts the IP application, be not less than the first threshold of setting if judge the value of the signal quality of described WIFI network, perhaps carry out in the process of IP application at described dual-mode handset, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is not the WIFI network, then select the WIFI network, and the sign of the WIFI network selected is sent to described network selecting Executive Module.
Described network is judged the selection module, also be used for carrying out the process that IP uses at described dual-mode handset, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is the WIFI network, then select the WIFI network, and the sign of the WIFI network selected is sent to described network selecting Executive Module.
Described network selecting Executive Module is used for the sign according to the described EDGE network that receives, and is connected with described EDGE network foundation or maintenance network.
Described network selecting Executive Module also is used for the sign according to the described WIFI network that receives, and sets up network with described WIFI network and is connected.
Described network selecting Executive Module also is used for the sign according to the described WIFI network that receives, and keeps being connected with described WIFI network of network.
Described network selecting Executive Module is according to the sign of the described WIFI network that receives, setting up network with described EDGE network is connected and is meant, described network selecting Executive Module is set up WIFI and is connected, obtain the IP address, and revise default route and point to the WIFI network interface, wherein, then close this EDGE and connect if exist EDGE to connect;
Described network selecting Executive Module is according to the sign of the described EDGE network that receives, setting up network with described EDGE network is connected and is meant, described network selecting Executive Module is set up EDGE and is connected, obtain the IP address, and revise default route and point to the EDGE network interface, wherein, then close this WIFI and connect if exist WIFI to connect.
As shown in Figure 2, dual-mode handset is judged which network of employing, may further comprise the steps,
Step 210: read WIFI network current demand signal quality RSSI
Wifi_curr
Step 220: compare RSSI
Wifi_currWith WIFI network peak signal quality RSSI
Wifi_max1/5th numerical value between relation, i.e. if the access threshold value used of WIFI network carrying IP is RSSI
Wifi_currBe not less than RSSI
Wifi_max/ 5, then change step 230, otherwise change step 280;
Step 230: current bearer network (initial value does not point to any network) has been the WIFI network, then changes step 250, otherwise changes step 240;
Step 240: select the WIFI network;
Step 250: start timer T to monitor the current network signal quality;
Step 260: timer T is overtime;
Step 270: use if the user has ended IP, then process ends; Otherwise change step 210;
Step 280: read EDGE network current demand signal quality RSSI
Edge_curr;
Step 290: compare RSSI
Edge_currWith EDGE network peak signal quality RSSI
Edge_max2/5ths numerical value between relation, i.e. if the access threshold value that EDGE network carrying IP uses is RSSI
Edge_currBe not less than RSSI
Edge_max* 2/5, then change step 291, otherwise the network selecting failure all is not enough to carry IP to current two networks of user report and uses process ends;
Step 291: current bearer network has been an EDGE network, then changes step 250, otherwise changes step 292;
Step 292: select EDGE network, change step 250.
As shown in Figure 3, dual-mode handset selects the WIFI network to comprise following step:
Step 310: set up WIFI with WIFI focus AP and be connected;
Step 320: obtain IP address, gateway address from AP;
Step 330: upgrade current default IP route according to the gateway address that acquires from AP, make it to point to the eth0 network interface, promptly data are received and dispatched from the WIFI network;
Step 340:, then close it if exist PPP to connect;
Step 350: it is WIFI that current bearer network is set.
As shown in table 2, wherein the default list item is the IP default route, shows that data are that the WIFI network sends, receives from the eth0 interface, and routing module carries out routing forwarding work according to information such as default list items just, specifically referring to Fig. 1.
As shown in Figure 4, dual-mode handset selects EDGE network to comprise following step:
Step 410: set up PPP with EDGE and be connected;
Step 420: obtain IP address, gateway address from PPP;
Step 430: upgrade current default IP route according to the gateway address that acquires from PPP, make it to point to the ppp network interface, promptly data are received and dispatched from EDGE network;
Step 440:, then close it if exist WIFI to connect;
Step 450: it is EDGE that current bearer network is set.
As shown in table 1, wherein the default list item is the IP default route, shows that the data data are that EDGE network sends, receives from the ppp0 interface, and routing module carries out routing forwarding work according to information such as default list items just, specifically referring to Fig. 1.
Method provided by the invention is utilized existing network fully, needn't transform the existing communication network and can reach IP and be applied in the purpose that automaticallyes switch under WIFI network and the EDGE network: when the EDGE/WIFI dual-mode handset carry out IP when using (as web page browsing, IP phone, online chatting etc.), if when detecting the WIFI signal quality greater than pre-threshold value, because having higher priority, the WIFI network directly adjudicates use WIFI network, setting up WIFI connects, revise default network route and point to the WIFI network interface, make IP application data and WIFI network interaction, and no matter whether EDGE network network signal quality this moment also enough good; Otherwise, EDGE network is used in judgement when detecting the WIFI signal quality and be lower than pre-threshold value, setting up PPP connects, revise default network route and point to the PPP network interface, make the IP application data with by the PPP network interaction, be applied between two networks and automatically switch thereby reach IP, promptly give full play to the two-forty of WIFI network, the advantage of low rate, can bring into play the wide continuity advantage of bringing that covers of EDGE network again, have higher realistic meaning.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (11)
1. the method for the automatic selection network of a dual-mode handset is characterized in that, comprise,
Dual-mode handset is when starting Internet Protocol IP and use or carry out reading the value of the signal quality of current wireless local area network standard WIFI network in the process that IP uses;
Described dual-mode handset is if the value of the signal quality of the described WIFI network of judgement less than the first threshold of setting, then reads the value of the signal quality of current enhanced data global system for mobile communications environment EDGE network;
Described dual-mode handset if the value of signal quality of judging described EDGE network more than or equal to second threshold value of setting, then described dual-mode handset is selected described EDGE network.
2. the method for claim 1 is characterized in that,
Described dual-mode handset is not less than the first threshold of setting if judge the value of the signal quality of described WIFI network when starting the IP application, then described dual-mode handset is selected the WIFI network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is not the WIFI network, then described dual-mode handset switches to the WIFI network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is the WIFI network, then described dual-mode handset keeps being connected with the WIFI network of network.
3. the method for claim 1 is characterized in that,
Described dual-mode handset is when starting IP and use, if the value of signal quality of judging described EDGE network is more than or equal to second threshold value of setting, then described dual-mode handset is selected described EDGE network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the network that the value of the signal quality of described EDGE network is used more than or equal to second threshold value and the current IP of setting is not an EDGE network, then described dual-mode handset switches to EDGE network, sets up network and connects;
Described dual-mode handset is in the process of carrying out the IP application, if judge that the network that the value of the signal quality of described EDGE network is used more than or equal to second threshold value and the current IP of setting is an EDGE network, then described dual-mode handset keeps being connected with the network of described EDGE network.
4. method as claimed in claim 2 is characterized in that,
Described dual-mode handset then obtains the IP address, and revises default route and point to the WIFI network interface if setting up the network of WIFI connects, and wherein if exist EDGE to connect, then closes this EDGE and connects.
5. method as claimed in claim 3 is characterized in that,
Described dual-mode handset then obtains the IP address, and revises default route and point to the EDGE network interface if setting up the network of EDGE connects, and wherein if exist WIFI to connect, then closes this WIFI and connects.
6. as the arbitrary described method of claim 1 to 5, it is characterized in that,
The value of the signal quality of the current WIFI that described dual-mode handset reads and two networks of EDGE is values of the signal quality received signal intensity indication of current WIFI and two networks of EDGE.
7. a dual-mode handset is characterized in that,
Comprise, network signal quality monitoring modular, network selection module and network selecting Executive Module, wherein,
Described network signal quality monitoring modular, be used for when described dual-mode handset starts Internet Protocol IP application or in the process of carrying out the IP application, obtain the value of the signal quality of current wireless local area network standard WIFI and two networks of enhanced data global system for mobile communications environment EDGE, and send to described network judgement selection module;
Described network is judged the selection module, be used for value according to the signal quality of the described WIFI network that receives, if the value of the signal quality of the described WIFI network of judgement is less than the first threshold of setting, then according to the value of the signal quality of the described EDGE network that receives, if the value of the signal quality of the described EDGE network of judgement is more than or equal to second threshold value of setting, then described dual-mode handset is selected EDGE network, and the sign of the EDGE network selected is sent to described network selecting Executive Module;
Described network selecting Executive Module is used for the sign according to the described EDGE network that receives, and is connected with described EDGE network foundation or maintenance network.
8. dual-mode handset as claimed in claim 7 is characterized in that,
Described network is judged the selection module, also be used for when described dual-mode handset starts the IP application, be not less than the first threshold of setting if judge the value of the signal quality of described WIFI network, perhaps carry out in the process of IP application at described dual-mode handset, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is not the WIFI network, then select the WIFI network, and the sign of the WIFI network selected is sent to described network selecting Executive Module;
Described network selecting Executive Module also is used for the sign according to the described WIFI network that receives, and sets up network with described WIFI network and is connected.
9. dual-mode handset as claimed in claim 7 is characterized in that,
Described network is judged the selection module, also be used for carrying out the process that IP uses at described dual-mode handset, if judge that the value of the signal quality of described WIFI network is not less than the first threshold of setting and the network of current IP application is the WIFI network, then select the WIFI network, and the sign of the WIFI network selected is sent to described network selecting Executive Module;
Described network selecting Executive Module also is used for the sign according to the described WIFI network that receives, and keeps being connected with described WIFI network of network.
10. dual-mode handset as claimed in claim 8 or 9 is characterized in that,
Described network selecting Executive Module is according to the sign of the described WIFI network that receives, setting up network with described EDGE network is connected and is meant, described network selecting Executive Module is set up WIFI and is connected, obtain the IP address, and revise default route and point to the WIFI network interface, wherein, then close this EDGE and connect if exist EDGE to connect;
Described network selecting Executive Module is according to the sign of the described EDGE network that receives, setting up network with described EDGE network is connected and is meant, described network selecting Executive Module is set up EDGE and is connected, obtain the IP address, and revise default route and point to the EDGE network interface, wherein, then close this WIFI and connect if exist WIFI to connect.
11. as the arbitrary described dual-mode handset of claim 7 to 9, it is characterized in that,
The value of the signal quality of the current WIFI that described network signal quality monitoring modular obtains and two networks of EDGE is values of the signal quality received signal intensity indication of current WIFI and two networks of EDGE.
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