CN104349411A - Network switching method, network switching device and terminal - Google Patents

Network switching method, network switching device and terminal Download PDF

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Publication number
CN104349411A
CN104349411A CN201310323098.XA CN201310323098A CN104349411A CN 104349411 A CN104349411 A CN 104349411A CN 201310323098 A CN201310323098 A CN 201310323098A CN 104349411 A CN104349411 A CN 104349411A
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China
Prior art keywords
network
quality parameter
parameter
terminal
wlan
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CN201310323098.XA
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CN104349411B (en
Inventor
相海涛
淮永龙
郑巍
高夕玲
陈林
庄莉
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ZTE Corp
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ZTE Corp
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Priority to CN201310323098.XA priority Critical patent/CN104349411B/en
Priority to PCT/CN2013/087076 priority patent/WO2014166254A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H04W36/008375—Determination of triggering parameters for hand-off based on historical data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a network switching method, a network switching device and a terminal. The method comprises: when the terminal is in a first network, detecting whether there is an available second network around the terminal, and obtaining a first detection result; when the first detection result indicates that there is a second network, registering the second network; after successfully registering the second network, detecting whether the terminal meets a switching condition for switching from the first network to the second network, and obtaining a second detection result; and when the second detection result indicates that the terminal meets the switching condition, switching the mobile terminal from the first network to the second network. The networks can be automatically switchedwhen the terminal is detected to meet the network switching condition, improving user experiences.

Description

A kind of method for switching network, device and terminal
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of method for switching network, device and terminal.
Background technology
Along with the development of mobile interchange and technology of Internet of things, various heterogeneous network gets more and more, with general packet radio service technology (General Packet Radio Service, GPRS), G mobile communication (3rd Generation, mobile communications network 3G) can provide the large-scale network coverage, long-term evolving network (Long Term Evolution, LTE) as forth generation mobile communication standard (4rd Generation, 4G) also start large-scale deployment, LTE has relative to the third generation and second generation communication standard and significantly promotes in transmission rate, target and the evolution tendency of following mobile broadband technology.Demand simultaneously along with electronic terminal product equipment network or access mobile interchange is more and more vigorous, WLAN (Wireless Local Area Network, WLAN) technology obtains fast development, any individual or mechanism can by disposing or rent the mode of multiple wireless access node AP (or its logical resource) voluntarily, form an independent Wireless Fidelity WIFI network, then provide free or the wireless access service of charge.WLAN just obtains applying more and more widely at some hot zones as a kind of wireless access network of high speed, and the multimode mobile broadband terminal with LTE and WIFI function is also more and more universal.
But mobile terminal can detect that in moving process plurality of wireless networks covers usually, when having available WLAN networks and LTE network, it is most important to raising Consumer's Experience which network insertion the Internet internet which network of concrete selection or need is switched to, the bandwidth resources that heterogeneous networks can be supplied to terminal are different, and along with forth generation network technical development and support high-performance terminal are popularized, user more pays close attention to Consumer's Experience and the terminal data performance of application program.But current most of mobile terminal is all manually selected preferentially to use a certain communication system by user, first user needs the current available WLAN networks of active searching, secondly after finding available WLAN networks, user needs manual registration to access Internet, this just requires that user can possess corresponding specialized network technical ability, also causes the trouble in use to user simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of method for switching network, device and terminal, when detecting that terminal meets network switching condition, can automatically carrying out the switching of network, promote Consumer's Experience.
To achieve these goals, embodiments provide a kind of method for switching network, for terminal, described method comprises:
When described terminal is in first network, detects described terminal surrounding and whether there is available second network, obtain the first testing result;
When described first testing result instruction exists described second network, register described second network;
When after the described second network success of registration, detect described terminal and whether meet the switching condition being switched to described second network by described first network, obtain the second testing result;
When described second testing result indicates described terminal to meet described switching condition, described mobile terminal is switched to described second network by described first network.
Above-mentioned method for switching network, wherein, described first network is WLAN WLAN, and described second network is long-term evolving network LTE; Or
Described first network is LTE network, and described second network is wlan network; Or
Described first network is the first sub-network in wlan network, described second network is the second sub-network in wlan network, the operator WLAN sub-network safeguarded by operator that wherein said wlan network comprises privately owned WLAN sub-network that the known or user of described terminal use can arrange, user orders and the accessible free WLAN sub-network without the need to authentication.
Above-mentioned method for switching network, wherein, the first network list of the privately owned WLAN sub-network that prestores in described terminal and the second network list of operator WLAN sub-network, the list information of network list at least comprises network service set identifier, login username and login password;
When described first network is LTE network, when described second network is wlan network, whether the described terminal surrounding of described detection exists available second network, obtains the first testing result and is specially:
Detect described terminal surrounding according to the priority orders preset and whether there is available second network, obtain the first testing result, wherein said priority orders is followed successively by the privately owned WLAN sub-network in first network list, the operator WLAN sub-network in second network list and described free WLAN sub-network.
Above-mentioned method for switching network, wherein, whether described detection exists available second network is specially:
The period 1 prestored according to described terminal detects whether there is available second network.
Above-mentioned method for switching network, wherein, when described second network is wlan network, described when described first testing result instruction exists described second network, register described second network and be specially:
When described first testing result instruction exists described second network, according to the login username in the described network list that terminal prestores and login password, register described second network.
Above-mentioned method for switching network, wherein, described switching condition is specially the signal quality parameter of signal quality parameter lower than described second network of described first network, and the channel quality parameter of described first network is lower than the channel quality parameter of described second network;
Whether the described terminal of described detection meets the switching condition being switched to described second network by described first network, obtains the second testing result and is specially:
Measure the signal quality parameter of described first network and described second network the second round prestored according to described terminal;
Judge that the signal quality parameter of described first network is whether lower than the signal quality parameter of second network, obtains the first judged result;
When the first judged result indicates the signal quality parameter of the signal quality parameter of described first network lower than second network, according to the present channel quality parameter measuring described first network described second round;
The historical channel mass parameter of the second network whether the present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result;
When the second judged result indicates the historical channel mass parameter of the present channel quality parameter of described first network lower than second network, determine that described second testing result is specially described terminal and meets described switching condition.
Above-mentioned method for switching network, wherein, the historical channel mass parameter of the second network whether described present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result and is specially:
The present channel quality parameter judging described first network whether in the first time period that described terminal is preset lower than the historical channel mass parameter of second network, obtain the second judged result;
When the historical channel mass parameter of present channel quality parameter lower than second network in described first time period of the second judged result instruction first network, determine that described second testing result is specially described terminal and meets described switching condition.
Above-mentioned method for switching network, wherein, described signal quality parameter comprises average received signal strength parameter and average signal-to-noise ratio parameter of measurement;
Described channel quality parameter comprises average packet loss ratio parameter and average throughput parameter;
Whether the described signal quality parameter judging described first network lower than the signal quality parameter of second network, obtains the first judged result and is specially:
When the average received signal strength parameter of described first network is lower than the average received signal strength parameter of described second network, the average signal-to-noise ratio parameter of described first network is lower than the average signal-to-noise ratio parameter of described second network simultaneously, determines that described first judged result is the signal quality parameter of signal quality parameter lower than second network of described first network;
The historical channel mass parameter of the second network whether described present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result and is specially:
When the average packet loss ratio of described first network is greater than the history average packet loss ratio of described second network, and the average throughput of described first network is less than the history average throughput of described second network, determine that described second judged result is the historical channel mass parameter of present channel quality parameter lower than second network of described first network.
Above-mentioned method for switching network, wherein, after being switched to described second network by described first network, described method also comprises:
Measure the present channel quality parameter of second network;
The historical channel mass parameter of the second network of described terminal storage is upgraded according to described present channel quality parameter.
Above-mentioned method for switching network, wherein, after measuring the present channel quality parameter of second network, described method also comprises:
Regulatory factor is added in described present channel quality parameter;
The described historical channel mass parameter upgrading the second network of described terminal storage according to described present channel quality parameter is specially:
The historical channel mass parameter of the second network of described terminal storage is upgraded by the present channel quality parameter adding regulatory factor.
Above-mentioned method for switching network, wherein, the absolute value of described regulatory factor and signal quality parameter product is inversely proportional to.
To achieve these goals, the embodiment of the present invention additionally provides a kind of network switching device, and for terminal, described device comprises:
First detection module, for when described terminal is in first network, detects described terminal surrounding and whether there is available second network, obtain the first testing result;
Registering modules, for when described first testing result instruction exists described second network, registers described second network;
Second detection module, for when after the described second network success of registration, detects described terminal and whether meets the switching condition being switched to described second network by described first network, obtain the second testing result;
Handover module, for when described second testing result indicates described terminal to meet described switching condition, is switched to described second network by described mobile terminal by described first network.
Above-mentioned network switching device, wherein, described first network is WLAN WLAN, and described second network is long-term evolving network LTE; Or
Described first network is LTE network, and described second network is wlan network; Or
Described first network is the first sub-network in wlan network, described second network is the second sub-network in wlan network, the operator WLAN sub-network safeguarded by operator that wherein said wlan network comprises privately owned WLAN sub-network that the known or user of described terminal use can arrange, user orders and the accessible free WLAN sub-network without the need to authentication.
Above-mentioned network switching device, wherein, the first network list of the privately owned WLAN sub-network that prestores in described terminal and the second network list of operator WLAN sub-network, the list information of network list at least comprises network service set identifier, login username and login password;
When described first network is LTE network, when described second network is wlan network, described first detection module is specially:
Detect described terminal surrounding according to the priority orders preset and whether there is available second network, obtain the first testing result, wherein said priority orders is followed successively by the privately owned WLAN sub-network in first network list, the operator WLAN sub-network in second network list and described free WLAN sub-network.
Above-mentioned network switching device, wherein, described first detection module is specially:
The period 1 prestored according to described terminal detects whether there is available second network.
Above-mentioned network switching device, wherein, when described second network is wlan network, described Registering modules is specially:
When described first testing result instruction exists described second network, according to the login username in the described network list that terminal prestores and login password, register described second network.
Above-mentioned network switching device, wherein, described switching condition is specially the signal quality parameter of signal quality parameter lower than described second network of described first network, and the channel quality parameter of described first network is lower than the channel quality parameter of described second network;
Described second detection module specifically comprises:
First measures submodule, measures the signal quality parameter of described first network and described second network the second round for prestoring according to described terminal;
First judges submodule, for judging that the signal quality parameter of described first network is whether lower than the signal quality parameter of second network, obtains the first judged result;
Second measures submodule, during for indicating the signal quality parameter of the signal quality parameter of described first network lower than second network when the first judged result, according to the present channel quality parameter measuring described first network described second round;
Second judges submodule, and the historical channel mass parameter of the second network whether the present channel quality parameter for judging described first network prestores lower than described terminal, obtains the second judged result;
Switching condition determination submodule, during for indicating the historical channel mass parameter of the present channel quality parameter of described first network lower than second network when the second judged result, determines that described second testing result is specially described terminal and meets described switching condition.
Above-mentioned network switching device, wherein, described second judges that submodule is specially:
The present channel quality parameter judging described first network whether in the first time period that described terminal is preset lower than the historical channel mass parameter of second network, obtain the second judged result;
When described switching condition determination submodule is specially the historical channel mass parameter when the second judged result indicates the present channel quality parameter of first network lower than second network in described first time period, determine that described second testing result is specially described terminal and meets described switching condition.
Above-mentioned network switching device, wherein, described signal quality parameter comprises average received signal strength parameter and average signal-to-noise ratio parameter of measurement;
Described channel quality parameter comprises average packet loss ratio parameter and average throughput parameter;
Described first judges that submodule is specially:
When the average received signal strength parameter of described first network is lower than the average received signal strength parameter of described second network, the average signal-to-noise ratio parameter of described first network is lower than the average signal-to-noise ratio parameter of described second network simultaneously, determines that described first judged result is the signal quality parameter of signal quality parameter lower than second network of described first network;
Described second judges that submodule is specially:
When the average packet loss ratio of described first network is greater than the history average packet loss ratio of described second network, and the average throughput of described first network is less than the history average throughput of described second network, determine that described second judged result is the historical channel mass parameter of present channel quality parameter lower than second network of described first network.
Above-mentioned network switching device, wherein, described device also comprises:
Measurement module, for measuring the present channel quality parameter of second network;
Update module, for upgrading the historical channel mass parameter of the second network of described terminal storage according to described present channel quality parameter.
Above-mentioned network switching device, wherein, described device also comprises:
Adjustment module, for adding regulatory factor in described present channel quality parameter;
Described update module is specially:
The historical channel mass parameter of the second network of described terminal storage is upgraded by the present channel quality parameter adding regulatory factor.
Above-mentioned network switching device, wherein, the absolute value of described regulatory factor and signal quality parameter product is inversely proportional to.
To achieve these goals, the embodiment of the present invention additionally provides a kind of terminal, comprises the network switching device described in above-mentioned any one.
The embodiment of the present invention has at least one item in following beneficial effect:
The embodiment of the present invention when detecting that terminal meets network switching condition, can carry out network switching automatically, promotes Consumer's Experience;
The criterion that the embodiment of the present invention switches using the signal quality parameter of network and channel quality parameter as network, further, only when the signal quality parameter of second network and channel quality parameter are all better than first network, be just switched to second network by first network;
The invention process regular meeting, according to the list information of the network list prestored in the terminal, directly registers second network, does not need user manually to input login username and password again, improves Consumer's Experience equally;
The embodiment of the present invention, when switching to second network by first network, mainly completing channel and switching, routing update etc., middle can not affect the current data task of terminal;
In embodiments of the present invention, the auto-adaptive parameter that terminal prestores can carry out self study, and further, terminal can carry out persistent storage, for follow-up;
The embodiment of the present invention also introduces regulatory factor for channel quality parameter, and regulatory factor is larger, and the preferred number of network channel is higher, more likely uses this network, correspondingly, just can reduce network switching times, effectively avoid frequent switching.
Accompanying drawing explanation
The schematic flow sheet of the method for switching network that Fig. 1 provides for the embodiment of the present invention;
The network list structure of the privately owned WLAN sub-network that Fig. 2 provides for the embodiment of the present invention;
The network list structure of the operator WLAN sub-network that Fig. 3 provides for the embodiment of the present invention;
The auto-adaptive parameter structural representation that Fig. 4 provides for the embodiment of the present invention
The network handover routines figure being switched to wlan network by LTE network that Fig. 5 provides for the embodiment of the present invention;
The switching condition judgement schematic diagram that Fig. 6 provides for the embodiment of the present invention;
The self-adaptive step random search method process schematic that Fig. 7 provides for the embodiment of the present invention;
The structural representation of a kind of network switching device that Fig. 8 provides for the embodiment of the present invention;
The structural representation of the another kind of network switching device that Fig. 9 provides for the embodiment of the present invention.
Embodiment
For the embodiment of the present invention will be solved technical problem, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiments provide a kind of method for switching network, for terminal, described method as shown in Figure 1, comprising:
Step 11, when described terminal is in first network, detects described terminal surrounding and whether there is available second network, obtain the first testing result;
Step 12, when described first testing result instruction exists described second network, registers described second network;
Step 13, when after the described second network success of registration, detects described terminal and whether meets the switching condition being switched to described second network by described first network, obtain the second testing result;
Step 14, when described second testing result indicates described terminal to meet described switching condition, is switched to described second network by described mobile terminal by described first network.
In embodiments of the present invention, end user manual is not needed to search for available second network, when terminal is in first network, terminal can detect available second network automatically, simultaneously after searching second network, does not also need user's manual registration to access, terminal can register second network automatically, after succeeding in registration, if detect when meeting switching condition, automatically described terminal is switched to second network by first network.Said process all has terminal automatically to carry out, and improves Consumer's Experience.
Introduce said method step by step below.
First, perform step 11, when described terminal is in first network, detects described terminal surrounding and whether there is available second network, obtain the first testing result.
Wherein, preferably, described first network is WLAN WLAN, and described second network is long-term evolving network LTE; Or
Described first network is LTE network, and described second network is wlan network; Or
Described first network is the first sub-network in wlan network, described second network is the second sub-network in wlan network, the operator WLAN sub-network safeguarded by operator that wherein said wlan network comprises privately owned WLAN sub-network that the known or user of described terminal use can arrange, user orders and the accessible free WLAN sub-network without the need to authentication.
Be better than wlan network because LTE network covers, so LTE network registration can complete registration when initial network is selected usually, therefore, be generally in first network LTE network during starting up of terminal.Now can detect described terminal surrounding and whether there is available second network wlan network;
Or after terminal starts shooting a period of time, be connected to a certain wlan network, now, whether can there is available LTE network around sense terminals;
Certainly, terminal can also switch between sub-network in wlan network, when being in the first sub-network in wlan network when terminal, detecting the second sub-network whether had in available wlan network, switching is carried out between WLAN sub-network to terminal and illustrates as follows.
< embodiment 1>
Terminal is in first network, first network is the privately owned WLAN sub-network in wlan network, the bandwidth that this network can provide for terminal use is between 1-2M, if and now detect that terminal surrounding exists available second network, second network is the operator WLAN sub-network in wlan network, the bandwidth that this network can provide for terminal use can reach 5M, and so terminal also can be switched to operator WLAN sub-network by privately owned WLAN sub-network, to obtain higher bandwidth.
Certainly, terminal is not limited to the switching between above-mentioned LET and wlan network or the switching between WLAN sub-network in internetwork switching, and other internetwork switchings are also the scope of protection of the invention.
The embodiment of the present invention preferably, the first network list of the privately owned WLAN sub-network that prestores in described terminal and the second network list of operator WLAN sub-network, the list information of network list at least comprises network service set identifier, login username and login password;
When described first network is LTE network, when described second network is wlan network, step 11 is specially:
Detect described terminal surrounding according to the priority orders preset and whether there is available second network, obtain the first testing result, wherein said priority orders is followed successively by the privately owned WLAN sub-network in first network list, the operator WLAN sub-network in second network list and described free WLAN sub-network.
Above-mentioned three seed network in wlan network, except accessible without the need to the free WLAN sub-network of authentication, other WLAN sub-network is when registering, generally all need to carry out log-on message verification terminal user all to need manually to input log-on message, in order to promote Consumer's Experience, the embodiment of the present invention preferably, maintain the first network list of privately owned WLAN sub-network and the second network list of operator WLAN sub-network in the terminal in advance, network service set identifier is at least comprised in list information, login username and login password, the list structure of first network list and second network list respectively as shown in Figures 2 and 3.Terminal, by safeguarding above-mentioned network list, when needing the network registering WLAN, just can directly be registered according to the list information of network list automatically, no longer needs end user manual to input log-on message.
When terminal is in LTE network, detect whether terminal surrounding exists available wlan network in order to more high efficiency, preferably, available wlan network whether can be there is according to terminal surrounding described in the priority sequence detection preset, privately owned WLAN sub-network has the first priority, second priority during operator's WLAN sub-network, finally just detects and whether there is available free WLAN sub-network.In addition, the WLAN sub-network be in consolidated network list can sort according to signal strength signal intensity height.
In addition, when whether there is available second network around sense terminals, if detected always, occupied terminal resource that can be too much, cause the wasting of resources, therefore, preferably, periodically can carry out the detection of second network, namely whether described detection exists available second network and can be specially:
The period 1 prestored according to described terminal detects whether there is available second network.
When described second network is wlan network, step 12 is specially:
When described first testing result instruction exists described second network, according to the login username in the described network list that terminal prestores and login password, register described second network.
When described first network is LTE network, when described second network is wlan network, or described first network is the first sub-network of wlan network, when described second network is the second sub-network of wlan network, directly with the login username in the network list prestored and login password, register described second network, no longer need end user manual to input log-on message.
When first network is wlan network, when second network is LTE network, LTE network carries out registering not needing username and password, can directly register.
It should be noted that, if registration second network is unsuccessful, so terminal can not be switched to second network from first network certainly, only after the success of registration second network, just need to perform step 13, detect described terminal and whether meet the switching condition being switched to described second network by described first network, obtain the second testing result.
In the embodiment of the present invention preferably, by the signal quality parameter of network and channel quality parameter as switching condition, second network is only when signal quality and channel quality all exceed first network, just meet switching condition, namely described switching condition is specially the signal quality parameter of signal quality parameter lower than described second network of described first network, and the channel quality parameter of described first network is lower than the channel quality parameter of described second network;
Described step 13 is specially:
Measure the signal quality parameter of described first network and described second network the second round prestored according to described terminal;
Judge that the signal quality parameter of described first network is whether lower than the signal quality parameter of second network, obtains the first judged result;
When the first judged result indicates the signal quality parameter of the signal quality parameter of described first network lower than second network, according to the present channel quality parameter measuring described first network described second round;
The historical channel mass parameter of the second network whether the present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result;
When the second judged result indicates the historical channel mass parameter of the present channel quality parameter of described first network lower than second network, determine that described second testing result is specially described terminal and meets described switching condition.
Generally, first detect the signal quality of two networks, if the signal quality of second network is lower than first network, so the channel quality of second network also can not higher than first network, therefore, in the embodiment of the present invention, preferably, first judge that the signal quality parameter of described first network is whether lower than the signal quality parameter of second network, then judge that the channel quality parameter of described first network is whether lower than the channel quality parameter of second network.
When measure signal quality parameters and channel quality parameter, preferably, the second terminal preset according to terminal carries out sampled measurements, calculating sampling mean value, illustrates as follows.
< embodiment 2>
Second round is 3.84 seconds, and sampling number is 3 times, and namely within every 1.28 seconds, perform and once sample, each cycle adopts the mean value of 3 results.
Further, the historical channel mass parameter of the second network whether described present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result and is specially:
The present channel quality parameter judging described first network whether in the first time period that described terminal is preset lower than the historical channel mass parameter of second network, obtain the second judged result;
When the historical channel mass parameter of present channel quality parameter lower than second network in described first time period of the second judged result instruction first network, determine that described second testing result is specially described terminal and meets described switching condition.
Because network channel occurs unexpected error sometimes, therefore, when weighing channel quality parameter, the channel quality parameter needing first network at least in first time period lower than second network time, just determine that the channel quality parameter of first network is lower than second network.
Further preferably, described signal quality parameter comprises average received signal strength parameter and average signal-to-noise ratio parameter of measurement;
Described channel quality parameter comprises average packet loss ratio parameter and average throughput parameter;
Whether the described signal quality parameter judging described first network lower than the signal quality parameter of second network, obtains the first judged result and is specially:
When the average received signal strength parameter of described first network is lower than the average received signal strength parameter of described second network, the average signal-to-noise ratio parameter of described first network is lower than the average signal-to-noise ratio parameter of described second network simultaneously, determines that described first judged result is the signal quality parameter of signal quality parameter lower than second network of described first network;
The historical channel mass parameter of the second network whether described present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result and is specially:
When the average packet loss ratio of described first network is greater than the history average packet loss ratio of described second network, and the average throughput of described first network is less than the history average throughput of described second network, determine that described second judged result is the historical channel mass parameter of present channel quality parameter lower than second network of described first network.
In embodiments of the present invention, first according to the average received signal strength parameter measuring first network and second network second round, and the average signal-to-noise ratio parameter of two networks, when the average received signal strength parameter of described first network is lower than the average received signal strength parameter of described second network, the average signal-to-noise ratio parameter of described first network is lower than the average signal-to-noise ratio parameter of described second network simultaneously, determines that described first judged result is the signal quality parameter of signal quality parameter lower than second network of described first network;
Then according to present channel average packet loss ratio and the average throughput of measuring first network second round, compare with average throughput with the history average packet loss ratio of the second network of prediction, when the average packet loss ratio of described first network is greater than the history average packet loss ratio of described second network, and the average throughput of described first network is less than the history average throughput of described second network, determine that described second judged result is the historical channel mass parameter of present channel quality parameter lower than second network of described first network, determine that terminal meets the switching condition being switched to second network by first network simultaneously.
When detecting that terminal meets switching condition, performing step 14, described terminal is switched to second network by first network.
Carrying out mainly completing channel switching, routing update, TCP/IP reprovision and link re-establishment when network switches, do not need to interrupt the ongoing data service of terminal.
As can be seen from said process, the information that terminal prestores comprises the first network list of privately owned WLAN sub-network and the second network list of operator WLAN sub-network, list information wherein at least comprises network service set identifier, login username and login password, also has the period 1 detected and whether there is second network, the second round of measure signal quality parameters and channel quality parameter, first time period, and the history average packet loss ratio of network and history average throughput.
Wherein first network list can be arranged by user, second network list is built in SIM card file or terminal ROM usually, editor is controlled by operator, user can not be arranged, in embodiments of the present invention, using the auto-adaptive parameter of other parameters except network list as terminal, the structure of auto-adaptive parameter as shown in Figure 4.
In embodiments of the present invention, auto-adaptive parameter when terminal is started shooting first derives from empirical value, can carry out adaptive learning to revise auto-adaptive parameter afterwards, after being namely switched to described second network by described first network by terminal, preferably, described method also comprises:
Measure the present channel quality parameter of second network;
The historical channel mass parameter of the second network of described terminal storage is upgraded according to described present channel quality parameter.
Auto-adaptive parameter preferably, in noncoconscious property random access storage device, can be undertaken safeguarding and revising by self study, not need user to carry out particular arrangement by persistent storage.
Described upgrades the historical channel mass parameter of the second network of described terminal storage preferably according to present channel quality parameter, Ke Yiwei:
Historical channel parameter is upgraded with the weighted average of present channel quality parameter and historical channel mass parameter.
Further, after measuring the present channel quality parameter of second network, described method also comprises:
Regulatory factor is added in described present channel quality parameter;
The described historical channel mass parameter upgrading the second network of described terminal storage according to described present channel quality parameter is specially:
The historical channel mass parameter of the second network of described terminal storage is upgraded by the present channel quality parameter adding regulatory factor.
The embodiment of the present invention introduces regulatory factor for channel quality parameter, in LTE network channel, the regulatory factor of throughput is u, in wlan network channel, the regulatory factor of throughput is v, because throughput and packet loss are inversely proportional to, generally, throughput is high, packet loss is just low, throughput is low, and packet loss is just high, and vice versa.Therefore, packet loss can directly represent with throughput-1, then the channel quality parameter adding regulatory factor is as follows:
The throughput Tlte_default=u+ ∑ Tlte_default' of LTE network;
The packet loss Plte_default=(u-1 of LTE network)+∑ Plte_default';
The throughput Twifi_default=v+ ∑ Twifi_default' of WIFI network;
The packet loss Pwifi_default=(v-1 of WIFI network)+∑ Pwifi_default';
Wherein, ∑ Tlte_default' is the weighted average of the average throughput of LTE network channel and the throughput of current service channel, ∑ Plte_default is the weighted average of the average packet loss ratio of LTE network channel and the packet loss of current service channel, and ∑ Twifi_default', ∑ Pwifi_default' are respectively the weighted average of the weighted average of the average throughput of WIFI network channel and the throughput of current service channel, the average packet loss ratio of WIFI network channel and the packet loss of current service channel.
Further, owing to weighing whether carry out network switching according to signal quality parameter and channel quality parameter in the embodiment of the present invention, described regulatory factor preferably, is inversely proportional to the absolute value of signal quality parameter product, the signal quality of channel is better, regulatory factor is larger, and the channel quality parameter adding regulatory factor is larger, and the preferred number of this network channel is higher, more likely use this network, correspondingly, just can reduce network switching times, effectively avoid frequent switching.
Better to the signal quality of channel, regulatory factor is larger, and the larger citing of channel quality parameter adding regulatory factor is described as follows.
< embodiment 3>
The regulatory factor u=1/(|SNR'*RSSI'| of throughput in LTE network channel), wherein SNR' is the average signal-to-noise ratio of LTE network, and RSSI' is the average received signal strength of LTE network.
The value of RSSI is generally negative value, so the signal quality parameter of LTE network is higher, namely average received signal strength is stronger, average signal-to-noise ratio is larger, the absolute value of the two product is less, and regulatory factor u is larger, correspondingly, in LTE network channel, the regulatory factor of packet loss is less, illustrates that the channel quality of this LTE network is better.
In the embodiment of the present invention, when terminal is in first network, if when having available second network around detecting, can according to the list information of the network list in the terminal that prestores, direct registration second network, does not need user manually to input login username and password again, and when terminal meets network switching condition, automatically carry out network switching, improve Consumer's Experience; Further, the criterion that the embodiment of the present invention switches using the signal quality parameter of network and channel quality parameter as network, only when the signal quality parameter of second network and channel quality parameter are all better than first network, be just switched to second network by first network; When switching to second network by first network, mainly completing channel and switching, routing update etc., middle can not affect the current data task of terminal; In addition, the auto-adaptive parameter that terminal prestores can carry out self study, and further, terminal can carry out persistent storage, for follow-up; The embodiment of the present invention also introduces regulatory factor for channel quality parameter, and regulatory factor is larger, and the preferred number of network channel is higher, more likely uses this network, correspondingly, just can reduce network switching times, effectively avoid frequent switching.
Said process is further illustrated below in conjunction with actual.
As shown in Figure 5, the process that network switches comprises:
Step 51, mobile terminal starts start, reads the configuration information of encrypted file system EFS file or nonvolatile random access memory, obtains the auto-adaptive parameter of terminal, specifically comprises:
Detect and whether there is period 1 of second network, the second round of measure signal quality parameters and channel quality parameter, first time period, and the history average packet loss ratio of each network and history average throughput., initial value derives from empirical value;
Step 52, mobile terminal carries out initial network selection, LTE network frequency within the scope of terminal Access Layer scanning current spatial, and registers;
Step 53, if when mobile terminal WIFI opens, terminal is according to the period 1, by the wlan network that the priority orders search preset is available around, available WLAN networks comprises the network service set identifier network identical with the network service set identifier in the first network list of the privately owned WLAN sub-network that terminal prestores, the network identical with the network service set identifier in the second network list of the operator WLAN sub-network that terminal prestores, and the accessible free wlan network without the need to authentication, and priority orders is: privately owned WLAN sub-network, operator WLAN sub-network and free WLAN sub-network,
Step 54, judges currently whether search out available wlan network, if search available wlan network, performs step 55, otherwise returns and perform step 53, proceeds periodic search;
Step 55, when searching available WLAN sub-network, login username in the first network list prestored according to terminal or second network list and login password, registration wlan network, certainly, if when available wlan network is free WLAN sub-network, directly registered, after succeeding in registration, perform step 56;
Step 56, whether sense terminals meets the switching condition being switched to wlan network by LTE network, and switching condition is specially:
If the average received signal strength parameter of LTE network is lower than the average received signal strength parameter of wlan network, simultaneously the average signal-to-noise ratio parameter of LTE network is lower than the average signal-to-noise ratio parameter of wlan network; And
In first time period, the average packet loss ratio of LTE network is greater than the history average packet loss ratio of this wlan network, and the average throughput of LTE network is less than the history average throughput of this wlan network;
If meet switching condition, perform step 57, otherwise return step 55, register the wlan network that other are available;
Step 57, switches to wlan network by described terminal by LTE network, and network switching mainly completes channel and switches, routing update, TCP/IP reprovision, and link re-establishment keeps data service unaffected;
Step 58, auto-adaptive parameter upgrades;
Step 59, terminates.
Step 56 wherein can be specially, as shown in Figure 6:
Step 561, when after facility registration wlan network, the signal quality parameter starting to carry out LTE network and wlan network is measured, and first terminal can remove measurement timer second round, then the signal strength signal intensity of two networks and signal to noise ratio are sampled, carry out N sampling each measuring period, N depends on that system realizes, in the embodiment of the present invention, initial second round adopts 3.84 seconds, N adopts 3 times, and namely within every 1.28 seconds, perform and once sample, each cycle adopts 3 mean values;
Step 562, judge that the signal quality parameter of LTE network is whether lower than the signal quality parameter of wlan network, namely judge that the average received signal strength parameter of LTE network is whether lower than the average received signal strength parameter of wlan network, simultaneously whether the average signal-to-noise ratio parameter of LTE network is lower than the average signal-to-noise ratio parameter of wlan network, if perform step 563, otherwise perform step 561;
Step 563, according to the channel quality parameter measuring LTE channel second round;
Step 564, the channel quality parameter judging LTE network whether in first time period lower than the historical channel mass parameter of wlan network, namely in first time period, whether the average packet loss ratio of LTE network is greater than the history average packet loss ratio of this wlan network, and whether the average throughput of LTE network is less than the history average throughput of this wlan network, the wherein initial value originate by experience value of first time period, the embodiment of the present invention adopts initial 10 seconds, if perform step 57, otherwise perform step 561.
Step 58 wherein can be specially, as shown in Figure 7:
Step 581, adjusting and optimizing auto-adaptive parameter.
After handover success, according to current network channel status, adjustment apparatus self-adaptation parameter, wlan network and LTE network average throughput and average packet loss ratio adopt weighted mean method, calculate and upgrade historical information, add regulatory factor u simultaneously, v, when the product of destination channel SNR' and RSSI' is less, u is larger, the preferred number of this network channel is higher, namely signal strength signal intensity and signal quality better, then its absolute value is less, product is less, then this network channel quality is better, also this network is more likely used, reduce network switching times, effectively avoid frequent switching,
Step 582, carries out persistent storage, for follow-up.
When starting up of terminal, generally be in LTE network, if now according to periodically available wlan network being detected, terminal can register this wlan network according to the list information of the network list prestored, once succeed in registration, terminal passes through signal quality parameter and the channel quality parameter of periodic measurement LTE network and this WLAN, if meet switching condition, terminal can switch to wlan network by LTE network automatically, whole process does not need user manually select available network and manually input log-on message etc., improves Consumer's Experience.
The embodiment of the present invention additionally provides a kind of network switching device, and for terminal, described device as shown in Figure 8, comprising:
First detection module, for when described terminal is in first network, detects described terminal surrounding and whether there is available second network, obtain the first testing result;
Registering modules, for when described first testing result instruction exists described second network, registers described second network;
Second detection module, for when after the described second network success of registration, detects described terminal and whether meets the switching condition being switched to described second network by described first network, obtain the second testing result;
Handover module, for when described second testing result indicates described terminal to meet described switching condition, is switched to described second network by described mobile terminal by described first network.
Above-mentioned network switching device, wherein, described first network is WLAN WLAN, and described second network is long-term evolving network LTE; Or
Described first network is LTE network, and described second network is wlan network; Or
Described first network is the first sub-network in wlan network, described second network is the second sub-network in wlan network, the operator WLAN sub-network safeguarded by operator that wherein said wlan network comprises privately owned WLAN sub-network that the known or user of described terminal use can arrange, user orders and the accessible free WLAN sub-network without the need to authentication.
Above-mentioned network switching device, wherein, the first network list of the privately owned WLAN sub-network that prestores in described terminal and the second network list of operator WLAN sub-network, the list information of network list at least comprises network service set identifier, login username and login password;
When described first network is LTE network, when described second network is wlan network, described first detection module is specially:
Detect described terminal surrounding according to the priority orders preset and whether there is available second network, obtain the first testing result, wherein said priority orders is followed successively by the privately owned WLAN sub-network in first network list, the operator WLAN sub-network in second network list and described free WLAN sub-network.
Above-mentioned network switching device, wherein, described first detection module is specially:
The period 1 prestored according to described terminal detects whether there is available second network.
Above-mentioned network switching device, wherein, when described second network is wlan network, described Registering modules is specially:
When described first testing result instruction exists described second network, according to the login username in the described network list that terminal prestores and login password, register described second network.
Above-mentioned network switching device, wherein, described switching condition is specially the signal quality parameter of signal quality parameter lower than described second network of described first network, and the channel quality parameter of described first network is lower than the channel quality parameter of described second network;
Described second detection module specifically comprises:
First measures submodule, measures the signal quality parameter of described first network and described second network the second round for prestoring according to described terminal;
First judges submodule, for judging that the signal quality parameter of described first network is whether lower than the signal quality parameter of second network, obtains the first judged result;
Second measures submodule, during for indicating the signal quality parameter of the signal quality parameter of described first network lower than second network when the first judged result, according to the present channel quality parameter measuring described first network described second round;
Second judges submodule, and the historical channel mass parameter of the second network whether the present channel quality parameter for judging described first network prestores lower than described terminal, obtains the second judged result;
Switching condition determination submodule, during for indicating the historical channel mass parameter of the present channel quality parameter of described first network lower than second network when the second judged result, determines that described second testing result is specially described terminal and meets described switching condition.
Above-mentioned network switching device, wherein, described second judges that submodule is specially:
The present channel quality parameter judging described first network whether in the first time period that described terminal is preset lower than the historical channel mass parameter of second network, obtain the second judged result;
When described switching condition determination submodule is specially the historical channel mass parameter when the second judged result indicates the present channel quality parameter of first network lower than second network in described first time period, determine that described second testing result is specially described terminal and meets described switching condition.
Above-mentioned network switching device, wherein, described signal quality parameter comprises average received signal strength parameter and average signal-to-noise ratio parameter of measurement;
Described channel quality parameter comprises average packet loss ratio parameter and average throughput parameter;
Described first judges that submodule is specially:
When the average received signal strength parameter of described first network is lower than the average received signal strength parameter of described second network, the average signal-to-noise ratio parameter of described first network is lower than the average signal-to-noise ratio parameter of described second network simultaneously, determines that described first judged result is the signal quality parameter of signal quality parameter lower than second network of described first network;
Described second judges that submodule is specially:
When the average packet loss ratio of described first network is greater than the history average packet loss ratio of described second network, and the average throughput of described first network is less than the history average throughput of described second network, determine that described second judged result is the historical channel mass parameter of present channel quality parameter lower than second network of described first network.
Above-mentioned network switching device, wherein, described device also comprises:
Measurement module, for measuring the present channel quality parameter of second network;
Update module, for upgrading the historical channel mass parameter of the second network of described terminal storage according to described present channel quality parameter.
Above-mentioned network switching device, wherein, described device also comprises:
Adjustment module, for adding regulatory factor in described present channel quality parameter;
Described update module is specially:
The historical channel mass parameter of the second network of described terminal storage is upgraded by the present channel quality parameter adding regulatory factor.
Above-mentioned network switching device, wherein, the absolute value of described regulatory factor and signal quality parameter product is inversely proportional to.
The embodiment of the present invention additionally provides a kind of preferred network switching device, as shown in Figure 9, comprising:
Configuration module, for the auto-adaptive parameter of maintenance terminal;
First detection module, for when described terminal is in first network, detects described terminal surrounding and whether there is available second network, obtain the first testing result;
Registering modules, for when described first testing result instruction exists described second network, registers described second network;
Second detection module, for after the described second network of registration is successful, detects described terminal and whether meets the switching condition being switched to described second network by described first network, obtain the second testing result, specifically comprise:
Measure submodule, for the signal quality parameter of measuring terminals in first network and second network and channel quality parameter;
Switch decision submodule, the measurement result according to measuring submodule judges whether to meet switching condition;
Handover module, for when described second testing result indicates described terminal to meet described switching condition, is switched to described second network by described mobile terminal by described first network;
Adaptation module, for after terminal switch to second network, carries out self study, revises the auto-adaptive parameter in described configuration module.
The embodiment of the present invention additionally provides a kind of terminal, comprises the network switching device described in above-mentioned any one.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (23)

1. a method for switching network, for terminal, is characterized in that, described method comprises:
When described terminal is in first network, detects described terminal surrounding and whether there is available second network, obtain the first testing result;
When described first testing result instruction exists described second network, register described second network;
When after the described second network success of registration, detect described terminal and whether meet the switching condition being switched to described second network by described first network, obtain the second testing result;
When described second testing result indicates described terminal to meet described switching condition, described mobile terminal is switched to described second network by described first network.
2. method for switching network as claimed in claim 1, it is characterized in that, described first network is WLAN WLAN, and described second network is long-term evolving network LTE; Or
Described first network is LTE network, and described second network is wlan network; Or
Described first network is the first sub-network in wlan network, described second network is the second sub-network in wlan network, the operator WLAN sub-network safeguarded by operator that wherein said wlan network comprises privately owned WLAN sub-network that the known or user of described terminal use can arrange, user orders and the accessible free WLAN sub-network without the need to authentication.
3. method for switching network as claimed in claim 2, it is characterized in that, the first network list of the privately owned WLAN sub-network that prestores in described terminal and the second network list of operator WLAN sub-network, the list information of network list at least comprises network service set identifier, login username and login password;
When described first network is LTE network, when described second network is wlan network, whether the described terminal surrounding of described detection exists available second network, obtains the first testing result and is specially:
Detect described terminal surrounding according to the priority orders preset and whether there is available second network, obtain the first testing result, wherein said priority orders is followed successively by the privately owned WLAN sub-network in first network list, the operator WLAN sub-network in second network list and described free WLAN sub-network.
4. the method for switching network as described in any one of claim 1-3, is characterized in that, whether described detection exists available second network is specially:
The period 1 prestored according to described terminal detects whether there is available second network.
5. method for switching network as claimed in claim 4, is characterized in that, when described second network is wlan network, described when described first testing result instruction exists described second network, registers described second network and is specially:
When described first testing result instruction exists described second network, according to the login username in the described network list that terminal prestores and login password, register described second network.
6. method for switching network as claimed in claim 4, it is characterized in that, described switching condition is specially the signal quality parameter of signal quality parameter lower than described second network of described first network, and the channel quality parameter of described first network is lower than the channel quality parameter of described second network;
Whether the described terminal of described detection meets the switching condition being switched to described second network by described first network, obtains the second testing result and is specially:
Measure the signal quality parameter of described first network and described second network the second round prestored according to described terminal;
Judge that the signal quality parameter of described first network is whether lower than the signal quality parameter of second network, obtains the first judged result;
When the first judged result indicates the signal quality parameter of the signal quality parameter of described first network lower than second network, according to the present channel quality parameter measuring described first network described second round;
The historical channel mass parameter of the second network whether the present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result;
When the second judged result indicates the historical channel mass parameter of the present channel quality parameter of described first network lower than second network, determine that described second testing result is specially described terminal and meets described switching condition.
7. method for switching network as claimed in claim 6, is characterized in that, the historical channel mass parameter of the second network whether described present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result and be specially:
The present channel quality parameter judging described first network whether in the first time period that described terminal is preset lower than the historical channel mass parameter of second network, obtain the second judged result;
When the historical channel mass parameter of present channel quality parameter lower than second network in described first time period of the second judged result instruction first network, determine that described second testing result is specially described terminal and meets described switching condition.
8. method for switching network as claimed in claims 6 or 7, it is characterized in that, described signal quality parameter comprises average received signal strength parameter and average signal-to-noise ratio parameter of measurement;
Described channel quality parameter comprises average packet loss ratio parameter and average throughput parameter;
Whether the described signal quality parameter judging described first network lower than the signal quality parameter of second network, obtains the first judged result and is specially:
When the average received signal strength parameter of described first network is lower than the average received signal strength parameter of described second network, the average signal-to-noise ratio parameter of described first network is lower than the average signal-to-noise ratio parameter of described second network simultaneously, determines that described first judged result is the signal quality parameter of signal quality parameter lower than second network of described first network;
The historical channel mass parameter of the second network whether described present channel quality parameter judging described first network prestores lower than described terminal, obtains the second judged result and is specially:
When the average packet loss ratio of described first network is greater than the history average packet loss ratio of described second network, and the average throughput of described first network is less than the history average throughput of described second network, determine that described second judged result is the historical channel mass parameter of present channel quality parameter lower than second network of described first network.
9. method for switching network as claimed in claim 8, it is characterized in that, after being switched to described second network by described first network, described method also comprises:
Measure the present channel quality parameter of second network;
The historical channel mass parameter of the second network of described terminal storage is upgraded according to described present channel quality parameter.
10. method for switching network as claimed in claim 9, is characterized in that, after measuring the present channel quality parameter of second network, described method also comprises:
Regulatory factor is added in described present channel quality parameter;
The described historical channel mass parameter upgrading the second network of described terminal storage according to described present channel quality parameter is specially:
The historical channel mass parameter of the second network of described terminal storage is upgraded by the present channel quality parameter adding regulatory factor.
11. method for switching network as claimed in claim 10, it is characterized in that, the absolute value of described regulatory factor and signal quality parameter product is inversely proportional to.
12. 1 kinds of network switching devices, for terminal, is characterized in that, described device comprises:
First detection module, for when described terminal is in first network, detects described terminal surrounding and whether there is available second network, obtain the first testing result;
Registering modules, for when described first testing result instruction exists described second network, registers described second network;
Second detection module, for when after the described second network success of registration, detects described terminal and whether meets the switching condition being switched to described second network by described first network, obtain the second testing result;
Handover module, for when described second testing result indicates described terminal to meet described switching condition, is switched to described second network by described mobile terminal by described first network.
13. want the network switching device as described in 12 as right, and it is characterized in that, described first network is WLAN WLAN, and described second network is long-term evolving network LTE; Or
Described first network is LTE network, and described second network is wlan network; Or
Described first network is the first sub-network in wlan network, described second network is the second sub-network in wlan network, the operator WLAN sub-network safeguarded by operator that wherein said wlan network comprises privately owned WLAN sub-network that the known or user of described terminal use can arrange, user orders and the accessible free WLAN sub-network without the need to authentication.
14. network switching devices as claimed in claim 13, it is characterized in that, the first network list of the privately owned WLAN sub-network that prestores in described terminal and the second network list of operator WLAN sub-network, the list information of network list at least comprises network service set identifier, login username and login password;
When described first network is LTE network, when described second network is wlan network, described first detection module is specially:
Detect described terminal surrounding according to the priority orders preset and whether there is available second network, obtain the first testing result, wherein said priority orders is followed successively by the privately owned WLAN sub-network in first network list, the operator WLAN sub-network in second network list and described free WLAN sub-network.
15. network switching devices as described in any one of claim 12-14, it is characterized in that, described first detection module is specially:
The period 1 prestored according to described terminal detects whether there is available second network.
16. network switching devices as claimed in claim 15, it is characterized in that, when described second network is wlan network, described Registering modules is specially:
When described first testing result instruction exists described second network, according to the login username in the described network list that terminal prestores and login password, register described second network.
17. network switching devices as claimed in claim 15, it is characterized in that, described switching condition is specially the signal quality parameter of signal quality parameter lower than described second network of described first network, and the channel quality parameter of described first network is lower than the channel quality parameter of described second network;
Described second detection module specifically comprises:
First measures submodule, measures the signal quality parameter of described first network and described second network the second round for prestoring according to described terminal;
First judges submodule, for judging that the signal quality parameter of described first network is whether lower than the signal quality parameter of second network, obtains the first judged result;
Second measures submodule, during for indicating the signal quality parameter of the signal quality parameter of described first network lower than second network when the first judged result, according to the present channel quality parameter measuring described first network described second round;
Second judges submodule, and the historical channel mass parameter of the second network whether the present channel quality parameter for judging described first network prestores lower than described terminal, obtains the second judged result;
Switching condition determination submodule, during for indicating the historical channel mass parameter of the present channel quality parameter of described first network lower than second network when the second judged result, determines that described second testing result is specially described terminal and meets described switching condition.
18. network switching devices as claimed in claim 17, it is characterized in that, described second judges that submodule is specially:
The present channel quality parameter judging described first network whether in the first time period that described terminal is preset lower than the historical channel mass parameter of second network, obtain the second judged result;
When described switching condition determination submodule is specially the historical channel mass parameter when the second judged result indicates the present channel quality parameter of first network lower than second network in described first time period, determine that described second testing result is specially described terminal and meets described switching condition.
19. network switching devices as described in claim 17 or 18, it is characterized in that, described signal quality parameter comprises average received signal strength parameter and average signal-to-noise ratio parameter of measurement;
Described channel quality parameter comprises average packet loss ratio parameter and average throughput parameter;
Described first judges that submodule is specially:
When the average received signal strength parameter of described first network is lower than the average received signal strength parameter of described second network, the average signal-to-noise ratio parameter of described first network is lower than the average signal-to-noise ratio parameter of described second network simultaneously, determines that described first judged result is the signal quality parameter of signal quality parameter lower than second network of described first network;
Described second judges that submodule is specially:
When the average packet loss ratio of described first network is greater than the history average packet loss ratio of described second network, and the average throughput of described first network is less than the history average throughput of described second network, determine that described second judged result is the historical channel mass parameter of present channel quality parameter lower than second network of described first network.
20. network switching devices as claimed in claim 19, it is characterized in that, described device also comprises:
Measurement module, for measuring the present channel quality parameter of second network;
Update module, for upgrading the historical channel mass parameter of the second network of described terminal storage according to described present channel quality parameter.
21. network switching devices as claimed in claim 20, it is characterized in that, described device also comprises:
Adjustment module, for adding regulatory factor in described present channel quality parameter;
Described update module is specially:
The historical channel mass parameter of the second network of described terminal storage is upgraded by the present channel quality parameter adding regulatory factor.
22. network switching devices as claimed in claim 21, it is characterized in that, the absolute value of described regulatory factor and signal quality parameter product is inversely proportional to.
23. 1 kinds of terminals, is characterized in that, comprise the network switching device described in any one of claim 12-22.
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