CN103501506A - Terminal self-adaptive data transmission system and method for Internet of Vehicles service - Google Patents
Terminal self-adaptive data transmission system and method for Internet of Vehicles service Download PDFInfo
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Abstract
The invention relates to a terminal self-adaptive data transmission system and method for an Internet of Vehicles service. The method comprises the following steps that a mobile terminal is started and sets link addresses of various data channels of a processing server end, and loop sequence orders of the data channels between the mobile terminal and the processing server; the processing server is in communication with the mobile terminal through the current data channel; if the current data channel cannot meet the communication requirement, whether a communication fault exists between the mobile terminal and the processing server is judged, if yes, the mobile terminal judges which data channel meets the communication requirement according to the preset data channel changing conditions, and the current data channel which cannot meet the communication requirement is switched to the data channel which meets the communication requirement. The terminal self-adaptive data transmission system and method for the Internet of Vehicles service can achieve real-time switch of the data channels.
Description
Technical field
The present invention relates to a kind of terminal self-adapting data transmission system and method for car internet services, relate in particular to a kind of terminal self-adapting data transmission system and method that is applied to distributed car internet services.
Background technology
The mode of car internet services and process are to realize by communicating by letter between mobile terminal and service platform, common communication mode has: voice call, speech data passage transmit data, note transmission and IP transfer of data, every kind of communication mode all has different separately applied environments and the defect corresponding with non-adaptive environment facies, for example, the speech data passage transmits the DTMF mode of data, its shortcoming is that the character class transmitted is less, is applicable to the less occasion of character class; And the movement-based communication network very easily be subject to the direct impact of wireless transmission environment such as note, IP data, particularly in wireless coverage adjacent region and the intersection region of different base station, communication can produce and have some setbacks, and causes the unstable and unreliable of information channel.Thereby lean on single terminal data passage to be difficult to meet the demand of different communication environment.
Chinese invention patent on this basis " a kind of binary channels command reception method of automatic navigator ", application publication number: CN102333286A, this patent document relates to a kind of binary channels command reception method of automatic navigator, be intended to overcome under employing single channel of the prior art the instruction of sending instruction to exist and can not receive or receive the shortcomings such as cost is high, time delay, after automatic navigator and Call Center Server establish a communications link, call center judges that whether the network of automatic navigator is unimpeded; If be judged as YES, utilize the GPRS data channel that instruction is sent to automatic navigator; If judge noly, utilize information channel that instruction is sent to automatic navigator with short message mode; It judges that the mode whether network is unimpeded is, automatic navigator is at interval of sending the Query Information bag to Call Center Server 5 seconds; The situation of Call Center Server in interval 15 seconds judges that whether network is unimpeded.Service center server can only be selected a selection, and system is decided in its sole discretion, can not manually or by preset order select the information transfer channel.
In view of above-mentioned defect, creator of the present invention has obtained this creation finally through long research and practice.
Summary of the invention
The object of the present invention is to provide a kind of car networking terminal self-adapting data transmission system and method, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the invention provides a kind of car networking terminal self-adapting data transmission system, it comprises at least one vehicle-mounted mobile terminal, one data communication network and a processing server, wherein, described mobile terminal carries out data interaction by described data communication network and described processing server, it arranges the link address of the described several data passage of described processing server, and the cyclic switching order of data channel between itself and described processing server, when the current data passage can not meet communicating requirement, it is by receiving the judgement of data mode to described processing server, transfer sequence according to default data channel is changed described data channel automatically,
Described data communication network, it uses at least two kinds of data channel, and described mobile terminal and processing server select according to the communications status of described data channel and the transfer sequence set in advance the reportedly defeated passage accessed;
Described processing server, it is corresponding with corresponding data channel respectively, and it is according to current communication failure, and judgement current data passage can not meet communication requirement, sends the control command that changes data channel to described mobile terminal.
Preferably, described data channel comprises: speech data passage, note data passage and IP data channel, wherein, described speech data passage, note data passage and IP data channel can be switched mutually.
The present invention also provides a kind of car networking terminal self-adapting data transmission method, the car networking terminal self-adapting data transmission system realization based on above-mentioned, it comprises the following steps:
Step a: described mobile terminal is opened, and it arranges the cyclic sequence order of data channel between the link address of described several data passage of described processing server and described mobile terminal and processing server;
Step b: described processing server communicates by current data passage and described mobile terminal;
Step c: described current data passage can not meet communicating requirement, according to the communication failure of described mobile terminal and processing server appearance, judged, if communication failure appears in described processing server, carry out following steps d, if communication failure appears in described data channel, carry out following step e; Steps d: described processing server sends the control command that changes data channel to described mobile terminal, carry out following step e;
Step e: which bar data passage of condition judgment that described mobile terminal changes according to the described various data channel that set in advance meets communication requirement, and switches to this data channel;
Step f, described processing server communicates by described qualified new data channel and described mobile terminal;
Step g: end operation.
Preferably, the process that in described step a, mobile terminal arranges the cyclic sequence order of data channel is:
Step a1, the preference data passage between described mobile terminal setting and described processing server;
Step a2, an alternative data channel between described mobile terminal setting and described processing server, when above-mentioned preference data passage can not satisfy the demands, be switched to this alternative data channel;
Step a3, a triple data path between described mobile terminal setting and described processing server, when above-mentioned two data channel can not satisfy the demands, be switched to this triple data path;
Step a4, described mobile terminal carries out cycle arrangement by each data channel according to a priority transfer sequence.
Preferably, the step that described step e comprises is:
Step e1, described mobile terminal communicates by described current data passage and described processing server;
Step e2, the communications status of the fixed described current data passage of described mobile terminal judgement can not satisfy the demands;
Step e3, described mobile terminal judges according to the priority transfer sequence in step a whether described next data channel meets communication requirement; If this data channel meets communication requirement, perform step e4; If this data channel does not meet communication requirement, jump to step e3;
Step e4, end operation.
Preferably, described mobile terminal judges that the process whether described new data channel meets communication requirement is: described mobile terminal connects the address of the built-in corresponding processing server of described terminal by described new data channel, if described mobile terminal is with corresponding processing server connection failure or be connected rear bust this, again attempted, if twice all failure, carry out above-mentioned steps e3.
Preferably, described data channel comprises speech data passage, note data passage and IP data channel, and wherein, described speech data passage, note data passage and IP data channel can be switched mutually.
Preferably, each data channel of the described mobile terminal setting in described step c does not meet communication requirement and the communication failure that judged is:
The communication failure of described speech data passage is: described mobile terminal fails to detect network signal, described mobile terminal is to described processing server transmitted signal, and the overtime or described processing server of the answer signal of described processing server returns to stand by tone or busy tone;
The communication failure of described note data passage is: described mobile terminal sends the note failure or sends successfully but return to not accepting state;
The communication failure of described IP data channel is: described mobile terminal be could not get on to the Net, and described mobile terminal is tested peer IP address automatically, and described transmission network is not smooth or packet loss is serious.
Preferably, each data channel of the described processing server setting in described step c does not meet communication requirement and the communication failure that judged is:
The communication failure of described speech data passage is: the IVR of described processing server can not correctly identify the information of described DTMF/FSK/USSD;
The communication failure of described note data passage is: the note data content that described processing server receives can not accurately be identified;
The communication failure of described IP data channel is: described processing server receives that data are imperfect maybe can't decode.
Preferably, in the handoff procedure of the cyclic sequence of carrying out above-mentioned data channel, after each circulation is finished, described mobile terminal arranges a time delay process, when described mobile terminal is switched to last data channel in cyclic sequence, still can not meet communication requirement, described mobile terminal time delay one Preset Time, then re-execute step e.
Beneficial effect of the present invention is compared with the prior art: car networking terminal self-adapting data transmission system of the present invention and method, the implementation process of the selection of much information transmission channel and information transfer channel is concentrated in a terminal, described mobile terminal, according to the circular order of the information transfer channel set in advance or the control command automatic switchover information transfer channel of processing server, is guaranteed stability and the reliability of communication between terminal and service platform; In the present invention, data channel is by a user or the default cyclic program of terminal, by transferring terminal switch data passage in turn, select best data channel within a short period of time, the selection of data channel is convenient to control, better the communication environment of Adaptive change.
The accompanying drawing explanation
The functional block diagram of the terminal self-adapting data transmission system that Fig. 1 is car internet services of the present invention;
The flow chart that Fig. 2 is car networking terminal self-adapting data transmission method embodiment mono-of the present invention;
The flow chart that Fig. 3 is car networking terminal self-adapting data transmission method embodiment of the present invention mono-mobile terminal preset data channel cycle order;
The processing server that Fig. 4 is car networking terminal self-adapting data transmission method embodiment mono-of the present invention receives the flow chart of the preferred embodiment of information state judgement;
The flow chart that Fig. 5 is car networking terminal self-adapting data passage embodiment of the present invention mono-cyclic sequence order preferred embodiment;
The flow chart that Fig. 6 is car networking terminal self-adapting data transmission method embodiment bis-of the present invention.
Embodiment
Below in conjunction with accompanying drawing, above-mentionedly to the present invention with other technical characterictic and advantage, be described in more detail.
The mode of car internet services and process are to realize by the much information transmission channel between mobile terminal and service platform, the described communication information comprises positional information, demand for services, information on services and the control information of mobile terminal, thus between described mobile terminal and service platform effectively and communicate by letter reliably and drive the key element of Service Operation platform service quality and service ability for the car intelligence of networking.The present invention rolls into one communication, and the automatic adaptation data channel realizes the function of real-time Dynamic Selection communication port.
Refer to shown in Fig. 1, it is the functional block diagram of car networking terminal self-adapting data transmission system of the present invention, it comprises at least one mobile terminal 1, one data communication network 2 and a processing server 3, wherein, it carries out data interaction by described data communication network 2 with described processing server 3 described mobile terminal 1, it arranges the link address of the described several data passage of described processing server, and and described processing server 3 between the cyclic switching order of data channel and the condition that described data channel changes, when the current data passage can not meet communicating requirement, it is by receiving the judgement of data mode to described processing server 3, transfer sequence according to default data channel is changed described data channel automatically,
It comprises at least two kinds of data channel described data communication network 2, described mobile terminal 1 and process service 3 devices and select the data transmission channel of access according to the communications status of described data channel and the transfer sequence that sets in advance;
Described processing server 3, it is corresponding with corresponding data channel respectively, and it is according to current communication failure, and judgement current data passage can not meet communication requirement, to described mobile terminal 1, sends the control command that changes data channel.
Please continue in conjunction with shown in Fig. 1, in the present embodiment, described data communication network 2 comprises three kinds of data channel, i.e. speech data passage 22, note data passage 23 and IP data channel 24; Wherein, described note data passage 23 is provided by mobile radio communication signalling path and the IP data network landed; Described IP data channel 24 is provided by mobile data network and the IP data network landed; Described speech data passage 22 comprises multiple transmission means:
DTMF is the dual-tone multifrequency mode, it itself is analog signal, can transmit through analog channel or digital channel, described mobile terminal 1 is used positional information, demand for services, information on services and the control information that this transmission means can transmission user, but it is only applicable to the less transmission occasion of character type;
FSK is the frequency shift keying mode, and it is a kind of use digital signal modulated carrier frequency, thereby realizes the modulation system that digital information transmits, and uses FSK, can transmit digital information by analog channel;
USSD is the unstructured supplementary data traffic mode, it is a kind of novel interactive data service based on the GSM/CDMA network, input the predefined numeral of some networks or symbol and send when using cell phone keyboard, just can send an instruction to network, network will be selected needed service according to instruction.
The following process that the present invention is changed to the information channel classification is described in detail.
In the present invention, described processing server and mobile terminal all can be carried out the handoff procedure of described data channel, described processing server and mobile terminal arrange respectively the condition of described data channel switching, when the current data passage can not meet communication requirement, according to the condition that can not meet communication requirement set in advance, artificial determine that what need to carry out the switch data passage is processing server or mobile terminal, described mobile terminal and processing server are operated according to predetermined operating procedure respectively.
Embodiment mono-, mobile terminal self switch data passage.
Refer to shown in Fig. 2, it is the flow chart of car networking terminal self-adapting data transmission method embodiment mono-of the present invention, and its process is:
Step a1, described mobile terminal 1 is opened, and it arranges the cyclic sequence order of data channel between the link address of described several data passage of described processing server and described mobile terminal 1 and processing server; When the user has the vehicle service demand, activation is placed in the client software of described mobile terminal 1 (in mobile phone or automatic navigator), carry out following operation in described mobile terminal 1, refer to shown in Fig. 3, it is the flow chart of car networking terminal self-adapting data transmission method embodiment of the present invention mono-mobile terminal preset data channel cycle order
Step a11, described mobile terminal 1 is set the data channel of a first-selection, is about to it and is made as the current data passage between described mobile terminal 1 and processing server 3;
Step a12, described mobile terminal 1 arranges an alternative data channel, and, when described current data passage can not meet the communication demand of described mobile terminal 1, at first described mobile terminal 1 is revised as described alternative data channel by its data channel;
Step a13, described mobile terminal 1 arranges a triple data path, when above-mentioned two data channel can not satisfy the demands, is switched to this triple data path.
Step a14, described mobile terminal 1 arranges the cyclic sequence order of each data channel, and each data channel is carried out to cycle arrangement according to a priority transfer sequence;
Step a15, end operation.
Step a2, described processing server 3 communicates by selected data channel and described mobile terminal 1;
Step a3, described current data passage can not meet communicating requirement, and communication failure appears in described mobile terminal 1;
If the described speech data passage 22 of described mobile terminal 1 access, the communication failure of described speech data passage 22 is: described mobile terminal 1 fails to detect network signal, described mobile terminal 1 is to described processing server 3 transmitted signals, and the overtime or described processing server 3 of the answer signal of described processing server returns to stand by tone or busy tone;
If the described note data passage 23 of described mobile terminal 1 access, the communication failure of described note data passage 23 is: described mobile terminal 1 sends the note failure or sends successfully but return to not accepting state;
If the described IP data channel 24 of described mobile terminal 1 access, the communication failure of described IP data channel 24 is: described mobile terminal 1 be could not get on to the Net, and described mobile terminal 1 is the test peer IP address automatically, and described transmission network is not smooth or packet loss is serious.
Described mobile terminal 1 judges the communications status of described data communication network according to the communication failure of above-mentioned steps a3, then judge the information accepting state of described processing server 3; Refer to shown in Fig. 4, its processing server for car networking terminal self-adapting data transmission method embodiment mono-of the present invention receives the flow chart of the preferred embodiment of information state judgement, it is that process is confirmed in an inquiry, in the present embodiment, the current data passage of only take is described as speech data passage 22, and its process is:
Step a31, described speech data passage 22 can not meet the communicating requirement of described mobile terminal 1; Step a32, described mobile terminal 1 sends an inquiry information by described speech data passage 22 to described processing server 3, and starts a time delay; Step a33, in delay time, described mobile terminal 1 judges whether it receives the feedback information of described processing server 3; If it receives the feedback information of described processing server 3, perform step a35, end operation; If, in its delay time, do not receive feedback information, carry out following step a4.
Step a4, described mobile terminal 1 switches to new data channel according to the circular order of the described data channel set in advance; Refer to shown in Fig. 5, it is the flow chart of car networking terminal self-adapting data passage embodiment of the present invention mono-cyclic sequence order preferred embodiment; The circular order arranged in this embodiment is: speech data passage 22, note data passage 23, IP data channel 24; Its process is:
Step a61, described mobile terminal 1 communicates with described processing server 3 by described speech data passage 22;
Step a62, the communications status of described mobile terminal 1 judgement institute speech data passage 22 can not satisfy the demands;
Step a63, described mobile terminal 1 judges whether described note data passage 23 meets communication requirement; If described note data passage 23 meets communication requirement, perform step a64, described mobile terminal 1 is switched to described note data passage 23, step a69, end operation;
If do not meet communication requirement, perform step a65, described mobile terminal 1 judges whether described IP data channel 24 meets communication requirement; If described IP data channel 24 meets communication requirement, perform step a66, described mobile terminal 1 is switched to described IP data channel 24, step a69, end operation;
If do not meet communication requirement, perform step a67, described mobile terminal 1 judges whether described speech data passage 22 meets communication requirement; If described speech data passage 22 meets communication requirement, carry out above-mentioned steps a61; If do not meet communication requirement, carry out above-mentioned steps a63.
In said process, described mobile terminal 1 judges that the process whether each data channel meets communication requirement is: described mobile terminal 1 connects the address of the built-in corresponding processing server of described mobile terminal 1 by described new data channel, if described mobile terminal 1 is with corresponding processing server connection failure or be connected rear bust this, again attempted, if twice all failure, attempted next data channel.The process that above-mentioned trial connects, guarantee that described mobile terminal is switched rapidly between different data channel, is connected to optimal data channel.
When network environment is comparatively severe, described mobile terminal 1 is after executing above-mentioned cyclic process, be not connected to yet satisfactory data channel, described mobile terminal 1 carries out a time delay process, when described mobile terminal 1 is switched to last data channel in cyclic sequence, still can not meet communication requirement, described mobile terminal time delay one Preset Time, then re-execute step a5.
Step a5, described processing server 3 communicates by described new data channel and described mobile terminal 1;
Step a6, end operation.
When the adaptive process of above-mentioned mobile terminal data transmission can not satisfy the demands at the current data passage, by a cyclic process set in advance, complete the switching of new data channel; In said process, described current data passage is determined switching condition according to the practical communication environment, i.e. the information fault of each data channel; Above-mentioned steps a2 and a3 can transpositions, now become described mobile terminal and set handoff procedure before carrying out transfer of data.At above-mentioned mobile terminal, carry out in the change process of data channel, described mobile terminal self is switched the data channel of access, can meet user's requirement of real time.
Embodiment bis-, and processing server is controlled mobile terminal switch data passage.
Refer to shown in Fig. 6, it is the flow chart of car networking terminal self-adapting data transmission method embodiment bis-of the present invention, and its process is:
Step b1, described mobile terminal 1 is opened, and it arranges the cyclic sequence order of data channel between the link address of described several data passage of described processing server and described mobile terminal 1 and processing server; This process is identical with above-described embodiment one.
Step b2, described processing server 3 communicates by selected data channel and described mobile terminal 1.
Step b3, described current data passage can not meet communicating requirement, and communication failure appears in the processing server of described response, and described processing server 3 sends to described mobile terminal 1 control command that changes data channel;
If the described speech data passage 22 of described processing server 3 access, the communication failure of described speech data passage 22 is: the IVR of described processing server 3 can not correctly identify the information of described DTMF/FSK/USSD;
If the described note data passage 23 of described processing server 3 access, the communication failure of described note data passage 23 is: the note data content that described processing server 3 receives can not accurately be identified;
If the described IP data channel 24 of described processing server 3 access, the communication failure of described IP data channel 24 is: described processing server 3 receives that data are imperfect maybe can't decode.
The transmission information of described data channel, through described processing server 3 judgements, meets the communication barrier of above-mentioned steps b3, by described formerly data channel, to described mobile terminal 1, sends a control command.
Step b4, described mobile terminal 1 receives described control command, judges that according to the circular order of the described data channel set in advance which bar data passage meets communication requirement, and switches to new data channel; This handoff procedure is identical with the handoff procedure of above-described embodiment one, and this repeats no more.
Step b5, described processing server communicates by described new data channel and described mobile terminal.
Step b6, end operation.
After switching to new data transmission channel, described processing server also sends confirmation by described new data channel to described mobile terminal, confirms to switch to new data channel.
At above-mentioned mobile terminal, carry out in the change process of data channel, described processing server, according to the data transmission information received, sends an instruction by downlink network and controls described mobile terminal switch data passage.
The foregoing is only preferred embodiment of the present invention, is only illustrative for invention, and nonrestrictive.Those skilled in the art is understood, and in the spirit and scope that limit in the invention claim, can carry out many changes to it, revise, and even equivalence, but all will fall within the scope of protection of the present invention.
Claims (10)
1. car networking terminal self-adapting data transmission system, it is characterized in that, it comprises at least one vehicle-mounted mobile terminal, one data communication network and a processing server, wherein, it carries out data interaction by described data communication network and described processing server described mobile terminal, it arranges the link address of the described several data passage of described processing server, and the cyclic switching order of data channel between itself and described processing server, when the current data passage can not meet communicating requirement, it is by receiving the judgement of data mode to described processing server, transfer sequence according to default data channel is changed described data channel automatically,
Described data communication network, it uses at least two kinds of data channel, and described mobile terminal and processing server select according to the communications status of described data channel and the transfer sequence set in advance the reportedly defeated passage accessed;
Described processing server, it is corresponding with corresponding data channel respectively, and it is according to current communication failure, and judgement current data passage can not meet communication requirement, sends the control command that changes data channel to described mobile terminal.
2. car according to claim 1 networking terminal self-adapting data transmission system, it is characterized in that, described data channel comprises: speech data passage, note transmission channel and IP data channel, wherein, described speech data passage, note transmission channel and IP data channel can be switched mutually.
3. car networking terminal self-adapting data transmission method, the car networking terminal self-adapting data transmission system based on the claims 1 realizes, it is characterized in that, it comprises the following steps:
Step a: described mobile terminal is opened, and it arranges the cyclic sequence order of data channel between the link address of described several data passage of described processing server and described mobile terminal and processing server;
Step b: described processing server communicates by current data passage and described mobile terminal;
Step c: described current data passage can not meet communicating requirement, according to the communication failure of described mobile terminal and processing server appearance, judged, if communication failure appears in described processing server, carry out following steps d, if communication failure appears in described data channel, carry out following step e;
Steps d: described processing server sends the control command that changes data channel to described mobile terminal, carry out following step e;
Step e: which bar data passage of condition judgment that described mobile terminal changes according to the described various data channel that set in advance meets communication requirement, and switches to this data channel;
Step f, described processing server communicates by described qualified new data channel and described mobile terminal;
Step g: end operation.
4. car according to claim 3 networking terminal self-adapting data transmission method, is characterized in that, in described step a, mobile terminal arranges the process of the cyclic sequence order of data channel and is:
Step a1, the preference data passage between described mobile terminal setting and described processing server;
Step a2, an alternative data channel between described mobile terminal setting and described processing server, when above-mentioned preference data passage can not satisfy the demands, be switched to this alternative data channel;
Step a3, a triple data path between described mobile terminal setting and described processing server, when above-mentioned two data channel can not satisfy the demands, be switched to this triple data path;
Step a4, described mobile terminal carries out cycle arrangement by each data channel according to a priority transfer sequence.
5. car networking terminal self-adapting data transmission method according to claim 4, is characterized in that, the step that described step e comprises is:
Step e1, described mobile terminal communicates by described current data passage and described processing server;
Step e2, the communications status of the fixed described current data passage of described mobile terminal judgement can not satisfy the demands;
Step e3, described mobile terminal judges according to the priority transfer sequence in step a whether described next data channel meets communication requirement; If this data channel meets communication requirement, perform step e4; If this data channel does not meet communication requirement, jump to step e3;
Step e4, end operation.
6. car according to claim 5 networking terminal self-adapting data transmission method, it is characterized in that, described mobile terminal judges that the process whether described new data channel meets communication requirement is: described mobile terminal connects the address of the built-in corresponding processing server of described terminal by described new data channel, if described mobile terminal is with corresponding processing server connection failure or be connected rear bust this, again attempted, if twice all failure, carry out above-mentioned steps e3.
7. car according to claim 3 networking terminal self-adapting data transmission method, it is characterized in that, described data channel comprises speech data passage, note data passage and IP data channel, and wherein, described speech data passage, note data passage and IP data channel can be switched mutually.
8. car according to claim 7 networking terminal self-adapting data transmission method, is characterized in that, each data channel of the described mobile terminal setting in described step c does not meet communication requirement and the communication failure that judged is:
The communication failure of described speech data passage is: described mobile terminal fails to detect network signal, described mobile terminal is to described processing server transmitted signal, and the overtime or described processing server of the answer signal of described processing server returns to stand by tone or busy tone;
The communication failure of described note data passage is: described mobile terminal sends the note failure or sends successfully but return to not accepting state;
The communication failure of described IP data channel is: described mobile terminal be could not get on to the Net, and described mobile terminal is tested peer IP address automatically, and described transmission network is not smooth or packet loss is serious.
9. car according to claim 7 networking terminal self-adapting data transmission method, is characterized in that, each data channel of the described processing server setting in described step c does not meet communication requirement and the communication failure that judged is:
The communication failure of described speech data passage is: the IVR of described processing server can not correctly identify the information of described DTMF/FSK/USSD;
The communication failure of described note data passage is: the note data content that described processing server receives can not accurately be identified;
The communication failure of described IP data channel is: described processing server receives that data are imperfect maybe can't decode.
10. car according to claim 5 networking terminal self-adapting data transmission method, it is characterized in that, in the handoff procedure of the cyclic sequence of carrying out above-mentioned data channel, after each circulation is finished, described mobile terminal arranges a time delay process, when described mobile terminal is switched to last data channel in cyclic sequence, still can not meet communication requirement, described mobile terminal time delay one Preset Time, then re-execute step e.
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