CN201260226Y - Dual frequency terminal - Google Patents

Abstract

The utility model discloses a dual-frequency terminal. The terminal comprises: a first radio-frequency module for searching signal of a first frequency-band network; a second radio-frequency module for searching the signal of a second frequency-band network; a base-band module for processing the output signal of a radio-frequency module; a switch module for connecting the base-band module with the first or the second radio-frequency module; and a network accessing module for directing the dual-frequency terminal to access into a network which corresponds to the first or the second radio-frequency module. The terminal further comprises a switch control module for directing the switch module to connect the base-band module with different radio-frequency modules and for directing the connected radio-frequency module to start network searching; after executing the switching, if the network signal is searched and the quality of the signal is higher than the specified threshold, the terminal is accessed into the corresponding network. By utilizing the dual-frequency terminal, the switching between networks of different frequency bands is realized, thus utilizing the advantages of networks with different frequency bands.

Description

A dual-band terminal

technical field

The utility model relates to the communication field, in particular to a dual-frequency terminal.

Background technique

The current CDMA (Code Division Multiple Access) network includes networks of two frequency bands——450M CDMA network and 800M CDMA network.

The 800M CDMA network covers a wide range and has achieved nationwide coverage. However, due to the lack of deployed base station equipment in some remote areas, the quality of network data received by users through the 800M CDMA network is relatively poor. As a supplement, the 450M CDMA network is mostly deployed in some remote areas, and has not formed a nationwide connected network. The coverage area is relatively narrow. Within the coverage area, the network data quality is relatively good. Once users leave the 450M network coverage area, you cannot get mobile communication services.

The current mobile terminal can only support a network of one frequency band (800M CDMA network or 450MCDMA network), so the advantages of these two networks cannot be taken into account.

Utility model content

The embodiment of the utility model provides a dual-band terminal to realize switching between networks of different frequency bands, thereby taking into account the advantages of networks of different frequency bands.

The dual-frequency terminal provided by the embodiment of the present invention includes:

The first radio frequency module is used to search for signals of the first frequency band network;

The second radio frequency module is used to search for signals of the second frequency band network;

A baseband module, configured to receive and process network signals searched by the first or second radio frequency module currently connected to the baseband module;

The switch module is used to disconnect the baseband module from the currently connected radio frequency module and connect it to another radio frequency module according to the switch switching instruction;

A switching control module, configured to output a switch switching instruction to the switching switch module, and instruct to perform a network search through the currently connected radio frequency module; When the network signal is found and the signal quality is higher than the specified limit, the network access indication is output;

The network access module is configured to connect the dual-frequency terminal to the frequency band network corresponding to the currently connected radio frequency module according to the network access instruction of the switching control module.

In the above embodiments of the present utility model, the dual-frequency terminal includes two sets of radio frequency modules and a switch module for selectively connecting the radio frequency module and the baseband module, and the switch control module indicates that different radio frequency modules are connected to the baseband module to realize different frequency bands Search between networks, so that when the network signal is searched or the network signal is found and the signal quality is higher than the set limit, the network of this frequency band is connected to realize switching between different frequency band networks, thus taking into account the coverage of different frequency band networks Advantages in terms of range and signal quality.

Description of drawings

FIG. 1 is a schematic structural diagram of a dual-frequency terminal in an embodiment of the present invention;

2 is a schematic diagram of the connection between the baseband module and the radio frequency module of the dual-frequency terminal in the embodiment of the present invention;

Fig. 3A, Fig. 3B are the structural diagrams of the switching control module in the embodiment of the utility model;

Fig. 4 is the flow chart of selecting the network when the user starts the machine in the embodiment of the present invention;

Fig. 5 is the flowchart of manually selecting the network in the standby state in the embodiment of the present invention;

Fig. 6 is a flow chart of automatically selecting a network in a standby state in an embodiment of the present invention;

Fig. 7 is a flow chart of selecting a network after a call is released in an embodiment of the present invention.

Detailed ways

Embodiments of the utility model are described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 1, it is a structural diagram of a dual-frequency terminal according to an embodiment of the present invention. The difference from the dual-frequency terminal in the prior art is that the dual-frequency terminal provided by the embodiment of the present invention includes 2 sets of radio frequency modules to realize signal Networks that are respectively modulated to different frequency bands, and a switch module and its control module for switching and connecting between two sets of radio frequency modules. As shown in Figure 1, the dual-frequency terminal mainly includes a baseband module 1, a switch module 2 connected to the baseband module 1, a radio frequency module 4 and a radio frequency module 5 selectively connected to the switch module 2, and an antenna connected to the radio frequency module 4 Module 6, the antenna module 7 that is connected with radio frequency module 5, and switch control module 3 and network access module 8, also comprise other peripheral functional modules, as, microphone, receiver, keyboard, display etc. (not in the figure Shows). Wherein, radio frequency module 4 and radio frequency module 5 modulate signal to the network of different frequency bands respectively, in the present embodiment, radio frequency module 4 modulates signal to 450M CDMA network, and radio frequency module 5 modulates signal to 800MCDMA network.

The antenna module 6 is used to receive the data of the 450M CDMA network and transmit it to the radio frequency module 4, and receive the data transmitted by the radio frequency module 4 and send it to the 450M CDMA network;

The antenna module 7 is used to receive the data of the 800M CDMA network and transmit it to the radio frequency module 5, and receive the data transmitted by the radio frequency module 5 and send it to the 800M CDMA network. The antenna module (6, 7) includes an antenna matching circuit unit, a duplexer, etc., the duplexer divides the signal into receiving and transmitting parts, and the duplexer isolates the transmitting and receiving radio frequency signals to reduce mutual interference;

The radio frequency module 4 is used to receive data from the baseband module 1, and forms the data signal of the 450M CDMA network after performing radio frequency processing such as channel modulation and transmits it to the antenna module 6; and, receives data from the antenna module 6 (comprising the searched network signal ) after performing radio frequency processing such as channel demodulation and outputting to the baseband module 1;

Radio frequency module 5, is used for receiving data from baseband module 1, forms the data signal of 800M CDMA network after carrying out radio frequency processing such as channel modulation and transmits to antenna module 7; And, receives data (comprising the network signal that searches for) from antenna module 7 After performing radio frequency processing such as channel demodulation, it is output to the baseband module 1;

The baseband module 1 is used to receive the data transmitted by the radio frequency module 4 or the radio frequency module 5, and send it to other peripheral function modules after performing baseband processing (such as demodulation, decoding, etc.); and, receive data (including audio data) from other peripheral function modules ) and provide it to the radio frequency module 4 or the radio frequency module 5 after performing baseband processing (such as encoding, modulation, etc.);

Switching control module 3 is used for according to the network signal that baseband module 1 receives (that is the network signal that radio frequency module 4 or radio frequency module 5 searches), to switching switch module 2 output switch switching instruction, instructs it to baseband module 1 in radio frequency Carry out switching connection between module 4 and radio frequency module 5, and instruct to carry out network search through the radio frequency module of current connection; When the radio frequency module searches for a network signal and the signal quality is higher than the specified limit, it outputs a network access indication;

The switching module 2 is configured to disconnect the baseband module 1 from the currently connected radio frequency module and connect it to another radio frequency module according to the switching instruction of the switching control module 3 . The transfer switch module can be realized by an electronic switch;

The network access module 8 is configured to connect the dual-frequency terminal to the network corresponding to the currently connected radio frequency module according to the network access instruction of the switching control module 3 .

FIG. 2 shows a connection schematic diagram of the baseband module and the radio frequency module in the embodiment of the present invention, wherein the radio frequency module 4 or the radio frequency module 5 is connected to the baseband module 1 through the switch module 2 . as the picture shows:

The baseband module 1 is mainly composed of a central control circuit unit, a storage circuit unit, a display circuit unit, an audio circuit unit, a ringing circuit unit, a keyboard circuit unit, a power supply circuit unit and an interface circuit unit, wherein:

The central control circuit unit is the core interface unit of the dual-frequency terminal, providing RF (Radio Frequency, radio frequency) and baseband part interfaces (such as Rx interface and Rt interface in Figure 2) and signal, audio circuit unit control, memory interface, etc., It can be realized by using the MSM6000 chip or the MSM6025 chip of QUALCOMM (that is, the chip manufacturer: Qualcomm). The MSM6000/MSM6025 chip includes a CDMA processor, a digital audio amplifier, a general-purpose A/D conversion circuit unit, and an ARM7TDMI microprocessor, and supports forward and reverse link synchronous peak data communications and high-speed UART and USB interfaces. In this embodiment, if the dual-band terminal needs to support data services well, the MSM6025 chip can be used; if the dual-band terminal has lower cost requirements and no special requirements for data services, the MSM6000 chip can be used. The CDMA processor of the MSM6000/MSM6025 chip performs complete 3G 1X CDMA IS2000 digital modulation and demodulation functions. The modulation process includes convolutional coding, interleaving, orthogonal modulation, direct sequence long code spread spectrum, baseband filtering, etc., and finally provides I/Q signals to the radio frequency module. The demodulation process includes RAKE receiver processing, correlation demodulation, deinterleaving, Viterbi decoding, etc., and finally provides digital audio signals to the vocoder and data information to other peripherals.

The radio frequency module 5 can adopt the RFR6122 chip+RFT6122 chip, wherein, the signal received from the antenna module 7 is filtered by the duplexer and selected to receive the low noise amplifier entering the RFR6122 chip, and directly down-converted to the baseband signal to generate I and Q two-way The analog signal enters the MSM6000/MSM6025 chip for further demodulation and completes the reception of the 800M CDAM signal; then it is controlled by the RFT6122 chip, Tx RF-SAW radio frequency filter, power amplifier CX77105, and burst mode/PA-ON control circuit unit And the power detection circuit unit completes the transmission of 800MCDMA signals.

The radio frequency module 4 can adopt the RFR6170 chip+RFT6170 chip, wherein, the signal received from the antenna module 6 is filtered by the duplexer and selected to receive the low noise amplifier entering the RFR6170 chip, and directly down-converted to the baseband signal to generate I and Q two-way The analog signal enters the MSM6000/MSM6025 chip for further demodulation and completes the reception of the 450M CDAM signal; it consists of the RFT6170 chip, Tx RF-SAW radio frequency filter, power amplifier CX77105, and burst mode/PA-ON control circuit unit and The power detection circuit unit completes the transmission of 450M CDMA signals.

The switching control module 3 of the above-mentioned dual-frequency terminal can control the switching module 2 and the network access module 8 to make the dual-frequency terminal switch between networks of different frequency bands. A schematic structural diagram of the switching control module 3 may be shown in FIG. 3A and FIG. 3B .

Referring to FIG. 3A , it is a schematic structural diagram of the switching control module 3 . The switching control module 3 includes a receiving unit 31, a judging unit 32 and an output unit 33, wherein:

The receiving unit 31 is used to receive the searched signal of the network where the dual-frequency terminal is currently located from the baseband module 1 in the standby state of the dual-frequency terminal, and the dual-frequency terminal can perform network search in real time (such as according to a set time or cycle);

A judging unit 32, configured to judge whether the receiving unit 31 has received the searched network signal, or if the searched network signal is received, whether the signal quality is higher than a prescribed limit;

The output unit 33 is configured to output a switch switching instruction to the switch module 2 when the receiving unit 31 does not receive a network signal, or when the network signal is received, and the signal quality is lower than a specified limit, and instruct the dual-frequency terminal to perform Network search; when the dual-frequency terminal operates according to the switch switching instruction, the receiving unit 31 receives the network signal through the currently connected radio frequency module, or when the signal quality is higher than the specified limit in the case of receiving the network signal, it will connect to the network. The input module 8 outputs the network access indication.

When the dual-frequency terminal performs a network search, the radio frequency module currently connected to the baseband module 1 via the switch module 2 searches for network signals through its antenna module. If a network signal is found, it is processed by the radio frequency module and the baseband module 1. Send to the receiving unit 31 of the switching control module 3.

After the switching switch module 2 receives the switch switching instruction, the baseband module 1 is disconnected from the currently connected radio frequency module and connected to another radio frequency module; after the network access module 8 receives the network access instruction, it accesses and searches for the The network corresponding to the network signal (that is, the network corresponding to the radio frequency module to which the baseband module 1 is currently connected).

Further, when the dual-frequency terminal is turned on (that is, the dual-frequency terminal is powered on), the output unit 33 can output a switch connection indication according to the configuration information of the preset priority search network, and control the switch module 2 to connect the baseband module 1 with the priority search network. Connect to the radio frequency module corresponding to the network, and instruct to search for network signals through the radio frequency module connected to the baseband module 1. The output unit 33 can also output the switch connection indication after the dual-frequency terminal releases the call, and control the switching switch module 2 to connect the baseband module 1 with the corresponding radio frequency module of the network that provides services for the call, and indicate the connection through the baseband module 1. The radio frequency module searches for network signals. The output unit 33 outputs the network signal to the network access module 8 when the receiving unit 31 receives a network signal after the dual-band terminal operates according to the switch connection instruction, or if the signal quality is higher than the specified limit when receiving the network signal. Access indication; when the dual-frequency terminal operates according to the switch connection indication, the receiving unit 31 does not receive the network signal, or when the signal quality is lower than the specified limit in the case of receiving the network signal, output the switch to the switch module 2 switching instruction, and instruct the dual-frequency terminal to perform network search; when the dual-frequency terminal acts according to the switch switching instruction, the receiving unit 31 receives the network signal, or when the signal quality is higher than the specified limit in the case of receiving the network signal, send The network access module 8 outputs a network access indication.

The switch module 2 performs corresponding actions according to the received switch switching instruction or switch connection instruction; the network access module 8 accesses the network corresponding to the radio frequency module currently connected to the baseband module according to the received network access instruction.

Referring to Fig. 3B, it is a schematic structural diagram of another switching control module according to the embodiment of the present invention. This module includes an input unit 34, a receiving unit 31, a judging unit 32, and an output unit 35. Through this switching control module, it can be realized according to user input. The instruction controls the switch module 2 to perform switching action. in:

The input unit 34 is configured to receive a network switching instruction input by a user to switch from a network in the current frequency band to a network in another frequency band;

The output unit 35, according to the network switching instruction received by the input unit 34, outputs the switch switching instruction, instructs the switch module 2 to switch from the radio frequency module corresponding to the network where the dual-frequency terminal is located to another radio frequency module, and instructs the dual-frequency terminal to perform network search ; After the dual-frequency terminal acts according to the switching indication of the switch, the receiving unit 31 receives the network signal, or when receiving the network signal and the signal quality is higher than the specified limit, input the network access instruction to the network access module 8; when the dual-frequency After the terminal acts according to the switch switching instruction, the receiving unit 31 does not receive the network signal, or when the network signal is received but the signal quality is lower than the specified limit, it outputs the switch switching instruction to the switch module 2, thereby switching back to the originally connected radio frequency module .

The switch module 2 performs corresponding actions according to the received switch switching instruction; the network access module 8 accesses the network corresponding to the radio frequency module currently connected to the baseband module according to the received network access instruction.

The switching control modules shown in FIG. 3A and FIG. 3B above can also be combined into one, that is, the function of the output unit 33 is integrated into the output unit 35, so as to realize the dual-frequency terminal network search based on the terminal network As a result, the switch module 2 is automatically controlled to perform the switching action, and the switch module 2 can also be controlled to perform the switching action according to the network switching instruction input by the user.

The switching control modules shown in Fig. 3A and Fig. 3B above can be realized by software. In the embodiment of the utility model, the realization of the switching control module is based on the DMSS 6000/6025 chip, and the operating mechanism of REX+DMSS6000/6025+BREW (wireless binary operating environment) is adopted. The switching control module can also be configured in the central control circuit unit (MSM6000/MSM6025 chip) of the baseband module 1, and use the GPIO signal output by the central control circuit unit to control the switching switch module 2 to perform connection or switching actions, such as when the GPIO signal is high Indicates that the switch module 2 is connected or switched to the radio frequency module 4 , and when the GPIO signal is low, it indicates that the switch module 2 is connected or switched to the radio frequency module 5 .

The dual-frequency terminal in the embodiment of the utility model can provide software driver support, modify the protocol and the main control design process for the radio frequency part using the above-mentioned switching control module architecture on the basis of mature products, so as to realize switching between different frequency band networks .

As shown in Figure 4, the dual-band terminal described in the embodiment of the present invention is a network selection process when the user starts up. When the user starts up, the following steps are performed:

In step 400, the dual-band terminal searches for a specified network with a higher priority according to the preset configuration information that it should search for networks first when starting up.

In this step, the dual-band terminal is pre-set with the information of the network to be searched when it is turned on, and it can be set which frequency band network is to be searched first. For example, the priority of the configured network information is 800MCDMA network and 450M CDMA network from high to low. Since the coverage of the 800M CDMA network is larger than that of the 450M CDMA network, the 800M CDMA network is searched preferentially by default in this embodiment.

After the dual-frequency terminal is turned on, the switch control module 3 indicates the switch module 2 to connect to the radio frequency module 5 corresponding to the network according to the 800M CDMA network specified by the configuration information, and performs network scanning and search for 800M CDMA network signals through the radio frequency module 5 .

Step 410 , the dual-band terminal judges whether it can search for a preset high priority network; if yes, execute step 440 ; if not, execute step 420 .

Step 420, searching for networks in other frequency bands.

In this step, the switching control module 3 of the dual-frequency terminal judges that the 800M CDMA network cannot be searched (that is, the network signal cannot be searched), and then the control switch module 2 is connected to the radio frequency module 4 corresponding to the 450M CDMA network, and the radio frequency module 4 passes through the radio frequency module. 4 Perform network scanning to search for 450M CDMA network signals.

Step 430, the dual-frequency terminal judges whether it can search for networks of other frequency bands, and if so, then executes step 440; otherwise, executes step 420, that is, continues to search for networks of other frequency bands, and will continue to search for 800M CDMA networks in this embodiment.

Step 440, the dual-frequency terminal connects to the searched network, performs network registration, authentication and other operations, and the dual-frequency terminal enters a standby state.

Normally, at least one of the 450M CDMA network and the 800M CDMA network can be searched. If not found, the network of the two frequency bands will be searched repeatedly according to the above process until the search is found or the search is terminated (reaching the set number of searches) and terminated).

As shown in Figure 5, the process of manually selecting a network for the dual-frequency terminal provided by the embodiment of the present invention in the standby state includes the following steps:

Step 500. During the standby process, the dual-band terminal receives a network switching command input by the user through shortcut keys or menus, that is, switching from the network of the current frequency band to the network of another frequency band. In this embodiment, the command input by the user indicates switching from the 800M CDMA network to the 450M CDMA network.

Step 510, the dual-frequency terminal searches for the target network, that is, the 450M CDMA network according to the received command.

In this step, the handover control module 3 of the dual-frequency terminal instructs the switch module 2 to be connected to the radio frequency module 4 corresponding to the 450M CDMA network according to the received order, and performs a network scan search for the 450M CDMA network through the radio frequency module 4. During the network search process, the dual-band terminal screen can display the message "Searching for a new network".

Step 520, the dual-frequency terminal judges whether the 450M CDMA network can be successfully searched, if yes, execute step 530; otherwise, execute step 540.

In this step, the dual-frequency terminal may perform step 540 after searching for the 450M CDMA network for multiple times fails, or after failing to search for the 450M CDMA network within a set period of time.

Step 530, the dual-frequency terminal switches to the searched target network, that is, the 450M CDMA network.

In this step, after the dual-frequency terminal searches for a 450M CDMA network, it can prompt the user to "search for a new network successfully". The network access module 8 of the dual-band terminal performs network switching according to the switching instruction of the switching control module 3 . Before switching from the current 800M CDMA network to the 450M CDMA network, execute the shutdown process first, so as to exit from the current 800M CDMA network, and then connect to the 450M CDMA network. During the shutdown process, the signaling interaction process between the dual-band terminal and the current network is the same as The standard shutdown procedure for this carrier is the same.

Step 540, the dual-band terminal abandons the network switching.

In this step, the switching control module 3 of the dual-frequency terminal judges that the search for the 450M CDMA network is less than, and then instructs the switch module 2 to be connected to the radio frequency module 5 corresponding to the 800M CDMA network, thereby still communicating under the 800M CDMA network.

As shown in Figure 6, the process of automatically selecting the network for the dual-band terminal provided by the embodiment of the present invention in the standby state includes the following steps:

Step 600, in the standby state, the dual-frequency terminal performs real-time (eg periodic) search for signals of the current network. In this embodiment, the current network is an 800M CDMA network.

Step 610, the dual-band terminal judges whether a network signal is found, and if no network signal is found, execute step 620; otherwise, continue to be in a standby state under the current network.

In order to further ensure the user's communication quality, a limit can also be specified for the quality of the network signal. When the dual-frequency terminal judges that the quality of the network signal found is lower than the specified limit according to the network search results, it searches for a network signal in another frequency band. For example: the sensitivity of the terminal is -106dBm. When the data intensity received by the terminal is lower than -100dBm, the dual-frequency terminal performs network search in another frequency band. The -100dBm here is the so-called specified limit.

Step 620, the dual-frequency terminal searches for 450M CDMA network signals.

In this step, when the switching control module 3 of the dual-frequency terminal judges that the current 800M CDMA network signal cannot be searched or the quality of the network signal found is lower than the set limit, it indicates that the switch module 2 is connected to the radio frequency corresponding to the 450M CDMA network Module 4, conduct network scanning and search for 450M CDMA network through radio frequency module 4.

Step 630, the dual-frequency terminal judges whether the 450M CDMA network can be successfully searched, if yes, execute step 650, otherwise execute step 640.

In this step, the dual-frequency terminal may perform step 640 after searching for the 450M CDMA network for multiple times fails, or after failing to search for the 450M CDMA network within a set time period.

Step 640, the dual-band terminal continues to stand by in the current network.

In this step, the switching control module 3 of the dual-frequency terminal judges that the search for the 450M CDMA network is less than, and then instructs the switch module 2 to be connected to the radio frequency module 5 corresponding to the 800M CDMA network, thereby still communicating under the 800M CDMA network.

Step 650, the dual-frequency terminal switches to the 450M CDMA network.

In this step, the network access module 8 of the dual-band terminal performs network switching according to the switching instruction of the switching control module 3 . Before the dual-frequency terminal switches from the current 800M CDMA network to the 450M CDMA network, it first executes the shutdown process, so as to exit from the current 800M CDMA network, and then connects to the 450MCDMA network. During the shutdown process, the signaling interaction between the dual-frequency terminal and the current network The procedure is the same as the standard shutdown procedure for this carrier frequency.

As shown in Figure 7, the process of network selection of the dual-frequency terminal provided by the embodiment of the present invention after the call release includes the following steps:

Step 700: After the dual-frequency terminal calls out, it searches for a network that provides services for the call. In this embodiment, the network providing service for the call is a 450M CDMA network.

In this step, after the dual-frequency terminal determines that the network providing services for the call is a 450M CDMA network, the switch control module 3 instructs the switch module 2 to connect to the radio frequency module 4, and performs network scanning and search for the 450M CDMA network through the radio frequency module 4 Signal.

Step 710, the dual-band terminal judges whether the network can be found; if yes, execute step 740; if not, execute step 720.

Step 720, searching for networks in other frequency bands.

In this step, the switching control module 3 of the dual-frequency terminal judges that the search for the 450M CDMA network is less than, and then instructs the switch module 2 to be connected to the radio frequency module 5 corresponding to the 800M CDMA network, and performs network scanning and searches for the 8000M CDMA network through the radio frequency module 5 Signal.

Step 730, the dual-frequency terminal judges whether it can search for networks of other frequency bands, and if so, then executes step 740; otherwise, executes step 720, that is, continues to search for networks of other frequency bands, and will continue to search for 450M CDMA networks in this embodiment.

Step 740, the dual-frequency terminal connects to the searched network, performs network registration, authentication and other operations, and the dual-frequency terminal enters a standby state.

In summary, the embodiment of the utility model processes the radio frequency signals of 800M CDMA and 450M CDMA respectively by setting two radio frequency modules on the dual-frequency terminal, and through the form of an electronic switch, according to different application occasions, the two frequency bands Switching realizes a terminal supporting CDMA terminal equipment of 800M/450M frequency band, thereby solving the inconvenience caused by a terminal only supporting one frequency band, enabling 450M CDMA users to switch to 800MCDMA network when leaving the 450M network area Covers better areas; at the same time, it can also enable CDMA800M users to switch to 450M CDMA network carrier frequencies with good local network resources in some remote areas with poor network coverage quality, which overcomes the fact that users cannot enjoy communication services well in the prior art Defects.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (10)

1, a kind of dual band terminal is characterized in that, comprising:

First radio-frequency module is used to search for the signal of the first frequency range network;

Second radio-frequency module is used to search for the signal of the second frequency range network;

Baseband module is used to receive and handle the network signal that current first or second radio-frequency module that is connected with this baseband module is searched for;

The diverter switch module is used for switching indication according to switch, and baseband module is connected with the current radio-frequency module disconnection that is connected and with another radio-frequency module;

The switching controls module is used for switching indication to described diverter switch module output switch, and indicates the radio-frequency module by current connection to carry out web search; Also be used for after described diverter switch module is carried out switch and switched indication, search network signal and signal quality when being higher than prescribed limit at the radio-frequency module of current connection, output network inserts indication;

Network access module is used for the network insertion indication according to described switching controls module, and dual band terminal is linked into the frequency range network corresponding with the radio-frequency module of current connection.

2, dual band terminal as claimed in claim 1 is characterized in that, described switching controls module comprises:

First receiving element is used for when described dual band terminal standby, receives the network signal of searching for by the radio-frequency module of current connection;

Judging unit be used to judge whether to receive network signal, and whether the quality of the network signal that receives is higher than prescribed limit;

First output unit is used for when described judgment unit judges is higher than prescribed limit for receiving network signal and signal quality, and output network inserts indication; Otherwise the output switch switches indication.

3, dual band terminal as claimed in claim 2 is characterized in that, described switching controls module also comprises input unit;

Described input unit is used for when described dual band terminal standby, and the network that receives user's input switches indication;

Described first output unit is further used for, the network that receives according to described input unit switches indication output switch and switches indication, indicate the radio-frequency module disconnection that baseband module is corresponding with the current place of described dual band terminal frequency range network and is connected with another radio-frequency module;

Described diverter switch module is further used for, and operates according to the described switch switching indication of described first output unit.

4, dual band terminal as claimed in claim 1 is characterized in that, described switching controls module comprises:

Input unit is used for when described dual band terminal standby, and the network that receives user's input switches indication;

Second output unit, the network that is used for receiving according to described input unit switches indication output switch and switches indication, the indication radio-frequency module that baseband module is corresponding with the current place of described dual band terminal frequency range network disconnects and is connected with another radio-frequency module, and after described diverter switch module is carried out described switch switching indication, judge and receive network signal that the radio-frequency module by current connection searches and signal quality when being higher than prescribed limit, then output network inserts indication; Otherwise the output switch switches indication;

Second receiving element is used for receiving the network signal by the radio-frequency module search of current connection after described diverter switch module is carried out the switch switching indication of described second output unit;

Judging unit be used to judge whether to receive network signal, and whether the quality of the network signal that receives is higher than prescribed limit.

5, as claim 2 or 3 or 4 described dual band terminals, it is characterized in that, described first or second output unit is further used for, after described diverter switch module is carried out described switch switching indication, do not receive network signal or receive network signal but signal quality when being lower than prescribed limit from the radio-frequency module of current connection in the regulation duration, the output switch switches indication.

6, as claim 2 or 3 or 4 described dual band terminals, it is characterized in that, described first or second output unit is further used for, when described dual band terminal is started shooting, frequency range network output switch according to preassigned first search connects indication, the indication radio-frequency module that baseband module is corresponding with the frequency range network of first search connects, and indication is carried out web search by the radio-frequency module that connects; After carrying out switch connection indication, radio-frequency module by current connection searches network signal or searches network signal and signal quality when being higher than prescribed limit, output network inserts indication, otherwise the output switch switches indication, and indication is carried out web search by the radio-frequency module that is connected to; After carrying out switch and switching indication, the radio-frequency module of current connection searches network signal or searches network signal and signal quality when being higher than prescribed limit, and output network inserts indication.

7, as claim 2 or 3 or 4 described dual band terminals, it is characterized in that, described first or second output module is further used for, the output switch connects indication behind described dual band terminal call release, indication is connected baseband module with the pairing radio-frequency module of network that service is provided for described calling, and indicates the radio-frequency module by current connection to carry out web search; After carrying out switch connection indication, the radio-frequency module of current connection searches network signal or searches network signal and signal quality when being higher than prescribed limit, output network inserts indication, otherwise the output switch switches indication, and indication is carried out web search by the radio-frequency module that is connected to; After carrying out switch and switching indication, the radio-frequency module of current connection searches network signal or searches network signal and signal quality when being higher than prescribed limit, and output network inserts indication.

8, dual band terminal as claimed in claim 1 or 2 is characterized in that, described switching controls module is further used for, and exports described switch to described baseband module and switches indication;

Described baseband module is further used for, and switches the central control circuit unit output control signal corresponding of indication by baseband module according to the switch that receives;

Described diverter switch module is further used for, and according to the described control signal that receives from described baseband module baseband module is connected with the current radio-frequency module disconnection that is connected and with another radio-frequency module.

9, as claim 1 or 2 or 3 or 4 described dual band terminals, it is characterized in that described diverter switch module is an electronic switch.

10, dual band terminal as claimed in claim 1, it is characterized in that, described first radio-frequency module and described second radio-frequency module be respectively with the code division multiple access of 450M frequency range insert the corresponding radio-frequency module of cdma network and with the corresponding radio-frequency module of the cdma network of 800M frequency range in one.

Images