CN103731907A - Network selection method based on multi-network convergence and multi-mode terminal device - Google Patents

Abstract

The embodiment of the present invention discloses a network selection method, based on a multi-mode terminal device, the multi-mode terminal device stores the network data transmission rate information and network load information of the first network and the second network, and the multi-mode terminal Comparing the data transmission rate information and load information of the two networks; judging the service type that the terminal is about to initiate or receive, the service type includes real-time service and non-real-time service; for real-time service, the multi-mode terminal preferentially selects the data transmission rate High network; if the communication quality of the currently preferred network does not meet the requirements of the real-time service, switch to another network and carry the real-time service through another network. For non-real-time services, the UE preferentially selects a network with a small load ; Through the above method, the service quality of the real-time service can be guaranteed, the network load can be balanced, and the user experience can be improved.

Description

Network selection method and multi-mode terminal equipment based on multi-network integration

technical field

The present invention relates to the technical field of wireless communication, in particular to a method for a multi-mode terminal to select a network in an environment where multiple networks coexist and a multi-mode terminal device.

Background technique

At present, wireless communication technology develops rapidly, from 2G, 3G, to LTE (Long Term Evolution, long-term evolution), WiMax (Worldwide Interoperability For Microwave Access, global microwave interconnection access), etc. Performance aspects such as capacity and time delay have been greatly improved. Many countries in the world support multiple wireless communication networks of different standards. Therefore, multiple different heterogeneous networks jointly cover a certain area. These networks are characterized by certain differences in coverage, data rates, and applicable service types. For example, some networks can provide high-speed data transmission services, while some networks support low-speed data transmission services and CS domain voice services. .

Currently, network selection is mainly based on the signal quality of the network under the coexistence of multiple networks. Taking 2G network and 3G network as an example, the existing technology adopts the following methods to solve the above problems: For the current 2G/3G dual-mode terminal, the user equipment UE preferentially resides on the 3G network and performs related services on the 3G network. After the quality of the network drops to a certain threshold, the UE switches to the 2G network, and when the network quality of the 3G network meets a certain threshold, it switches to 3G.

Since 2G and 3G are applicable to different services, cell selection is only based on signal quality, which affects user service experience. Therefore, for multi-mode terminals that can support multiple network standards at the same time, how to select a network from multiple supported heterogeneous networks to carry corresponding services, meet user service needs, and improve user experience has become an urgent task. unresolved issues.

Contents of the invention

Embodiments of the present invention provide a network selection method and a multi-mode terminal device in the case of coexistence of multiple networks, which are used to ensure the service quality of real-time services, balance network loads, and improve user experience, wherein:

The network selection method in the case of coexistence of multiple networks is applied to a user terminal UE based on a multi-mode, and the multi-mode UE stores information related to the first network and the second network, and the related information includes at least the network data transmission rate Information and network load information, the UE compares the data transmission rate information and load information of the two networks; the method includes the following steps:

Judging the service type that the terminal is about to initiate or receive, the service type includes real-time service and non-real-time service;

For real-time services, the UE preferentially selects a network with a high data transmission rate, and preferentially carries real-time services through the network with a high data transmission rate;

If the communication quality of the currently preferred network does not meet the requirements of the real-time service, switch to another network, and carry the real-time service through another network.

For non-real-time services, the UE preferentially selects a network with a small load, and preferentially uses the network with a small load to carry the non-real-time service.

The multi-mode terminal device supports communication through the first network and the second network, and the terminal device includes:

A network identification module, used to store information related to the first network and the second network, the related information at least includes network data transmission rate information and network load information; the network identification module also checks the data transmission rate information of the two networks Compare with load information;

A business judging module, configured to judge the type of business that the terminal is about to initiate or receive, the business type including real-time business and non-real-time business;

The first network processing module is configured to select the first network and preferentially carry real-time services through the first network when the output information of the network identification module indicates that the data transmission rate of the first network is relatively high; When the output information of the network identification module indicates that the load of the first network is low, select the first network, and preferentially carry non-real-time services through the first network;

The second network processing module is configured to select the second network and preferentially carry real-time services through the second network when the output information of the network identification module indicates that the data transmission rate of the second network is relatively high; When the output information of the network identification module indicates that the load of the second network is low, select the second network, and preferentially carry non-real-time services through the second network;

The adaptation module is used to make the terminal switch to another network and carry the real-time service through another network when the communication quality of the network with a higher data transmission rate does not meet the real-time service requirement.

The above technical solution has the following advantages:

Since real-time services have high requirements on data transmission rate and delay, in the embodiment of the present invention, a network with a higher data transmission rate is preferred to carry real-time services, which can meet the requirements of real-time services on data transmission rate and delay. , to improve the user's service experience. In addition, because non-real-time services have lower requirements on data transmission rate and delay, for non-real-time services, the network with a smaller load is preferred for carrying; it can balance the load of each network and reduce Small network congestion, to avoid service quality degradation or interruption.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

Fig. 1 is the method flowchart of the embodiment of the present invention;

FIG. 2 is a structural diagram of a terminal device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an overall scheme of a terminal device according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the relevant drawings.

Embodiment one

Embodiment 1 of the present invention provides a network selection method in the case of coexistence of multiple networks, which is applied to a user terminal UE based on a multi-mode, and the UE is used to store information related to the first network and the second network. The information at least includes network data transmission rate information and network load information; wherein the data transmission rate of the first network is greater than that of the second network, and the load of the second network is smaller than that of the first network. Referring to FIG. 1, the method includes the following steps:

S10. Determine the business type;

S11. For the real-time service, select the first network, and preferentially carry the real-time service through the first network;

S12. For the non-real-time service, select the second network, and preferentially carry the non-real-time service through the second network;

S13. When the communication quality of the first network does not meet the requirement of the real-time service, the UE performs network switching, and carries the real-time service through the second network.

The embodiment of the present invention can be executed by a multi-mode terminal device. The terminal device contains a SIM card. The SIM card here is a SIM card in a broad sense, that is, it generally has the ability to store user-related information and complete communication related functions such as authentication and encryption. All SIM cards with functions can be considered as SIM cards in the embodiments of the present invention, for example, they can be SIM cards in 2G networks, or USIM cards in 3G and LTE networks.

The real-time service is a service that requires real-time data interaction, and the non-real-time service is a service that requires no real-time response for access. The first network and the second network may periodically update the relevant information to the multi-mode terminal through system information, so as to ensure that the multi-mode terminal obtains the latest relevant information.

In the embodiment of the present invention, selecting the first network to carry real-time services and selecting the second network to carry non-real-time services refers to: realizing real-time or non-real-time services based on the first network or the second network, such as realizing real-time services through the first network Streaming media services, video conferencing, etc.; background and conversational services, etc. are realized through the second network. By camping on or switching the UE to the first or second network, real-time or non-real-time services can be carried by the first or second network.

In the embodiment of the present invention, the specific forms of the first network and the second network are not limited. At the same time, the quality of communication between the first network and the second network, as well as the speed of data transmission are relative. Therefore, the first The specific forms of the network and the second network are also relative. For example, the first network may be a 3G network or WLAN or LTE or WiMAX, and the second network may be a 2G network. The 2G network has experienced large-scale application for a long time, so the network coverage is wide and the communication quality is good, but compared with 3G and other networks, its data transmission rate is lower. Alternatively, the second network can also be a 3G network. When the second network is a 3G network, the first network can be WLAN or LTE or WiMAX; that is, when the 3G network is widely used, the fourth generation communication network needs to be deployed (LTE), then the 3G network has a long application time and wide network coverage compared to LTE, so its communication quality is better than that of the LTE network, but the data transmission is slower than LTE; of course, the first network can also be 2G network, and the second network may be WLAN, LTE, or WiMAX.

It should be noted that the first network and the second network in the embodiment of the present invention do not mean that they only handle the business of "one" first network and the business of "one" second network, but should be understood as not Limit the number of specific supported network types. For example, multiple networks can be supported, including 2G, 3G, and LTE; at this time, one of 2G or 3G can be selected as the first network; 3G (this can be selected when the first network is 2G) or LTE (the first network is 2G) 2G or 3G, you can choose one of this) as the second network.

In the embodiment of the present invention, the relevant information of the network may be stored through the SIM card. At the same time, when the SIM card cannot store the parameter information of a specific network, the parameter information is stored through a third-party memory (such as internal memory or flash).

In the embodiment of the present invention, since two networks and two types of services are involved, when the UE initiates or receives two services, conflicts may also occur when accessing resources (such as simultaneous access), therefore, also The real-time or non-real-time services need to be processed so that the services do not conflict, such as accessing resources that need to be accessed simultaneously through round robin or notification.

In the embodiment of the present invention, the first network is preferentially selected to carry real-time services, and the non-real-time services are configured on the second network. In this way, the high-speed data transmission characteristics of the first network can be used to complete real-time services, and at the same time, the second network can be used The feature of small load is used to complete non-real-time services and balance network loads, so that users generally do not need to reselect and switch between 2G and 3G during use, and thus will not appear in the process of reselection or switching In the case of service terminals or service quality degradation, user experience is improved.

Further, in the embodiment of the present invention:

When the communication quality of the first network does not meet the real-time service requirement and the second network can carry the real-time service, handover the UE to the second network, and the second network carries the real-time service. This solution is an optional solution. If the second network has the capability of carrying the real-time service, then the above steps can be performed to switch to the second network when the communication quality of the first network does not meet the real-time service requirement. If the second network is not capable of carrying the real-time service, for example, the second network is a GSM network and the real-time service is a video conference, this step may not be performed.

The network communication quality here can be evaluated with reference to various parameters according to the actual situation. For example, you can refer to whether the signal strength of the network meets a certain threshold to determine whether the network quality can meet service requirements. If the signal strength is lower than a certain threshold, it can be considered that the network communication quality cannot meet service requirements and a network switch is required. When judging the quality of network communication, different conditions can be set according to different networks and different services for judgment. For example, a judgment condition is used for real-time business switching from the first network to the second network, and switching from the second network to the first network When using another judgment condition.

In addition, in the embodiment of the present invention, when the network communication quality recovers, related services can be switched back to the original network, such as switching real-time services from the second network to the first network, and the first network carries the real-time business.

It can be understood that, the foregoing real-time service preferentially selects the first network and the non-real-time service preferentially selects the second network under the condition that the communication quality of the respective networks can meet service requirements. In practical applications, if the communication quality of a certain network cannot meet the service requirements, it will first judge whether the communication quality of another network can meet the service requirements, and then choose to switch if it can; otherwise, do not switch.

Through the above method, when the communication quality of a certain network cannot meet the relevant business requirements, the relevant business can be processed by another network, so that the execution of the business can continue to be guaranteed.

Embodiment two

Based on Embodiment 1, this embodiment of the present invention provides a multi-mode terminal device. Referring to FIG. 2 , the terminal device of this embodiment of the present invention includes a network identification module 201, such as a SIM card, for storing information about the first network and the second network. information, the relevant information at least includes network data transmission rate information and network load information, and the network identification module also compares the data transmission rate information and load information of the two networks, wherein the data transmission rate of the first network is greater than that of the second network Two networks, the load of the second network is smaller than that of the first network; for specific descriptions of the first network and the second network, please refer to the relevant part of the description in Embodiment 1, which will not be repeated here.

A business judging module 202, configured to judge the type of business that the terminal is about to initiate or receive, the business type including real-time business and non-real-time business;

The first network processing module 203 is configured to select the first network when the output information of the network identification module indicates that the data transmission rate of the first network is relatively high, and preferentially carry real-time services through the first network;

The second network processing module 204 is configured to select the second network when the output information of the network identification module indicates that the load of the second network is small, and preferentially carry the non-real-time service through the second network;

The adaptation module 205 is configured to, when the communication quality of the first network does not meet the requirement of the real-time service, make the terminal switch to the second network, and carry the real-time service through the second network.

The embodiment of the present invention also includes: a SIM agent module 206, configured to process the services of accessing the SIM card, so that the accessed services will not conflict; or, when the SIM card cannot store specific parameter information, through a third-party memory to store the parameter information.

Wherein, when carrying (processing, executing) real-time services through the first network, the relevant service processing functions are completed by the first network processing module 203; when non-real-time services are carried through the second network, completed by the second network processing module 204 Corresponding business processing functions. The first network processing module 203 and the second network processing module 204 are connected to the network identification module 201 to complete corresponding processes.

It should be noted that the above units are functionally divided modules, which are not strictly limited to each other. For example, for the adaptation module, it can also be considered that the function can be implemented by the first network processing module or the second network processing module. Two network processing modules or other modules to complete all or part of the functions. At the same time, the specific implementation of these modules is not limited in the embodiment of the present invention. It can usually be completed by related hardware chips (such as CPU, DSP) and other devices and running corresponding software. Each module can use the same chip, or separately It is implemented by using different chips, which is not limited in this embodiment of the present invention.

Since the first network and the second network have different specific forms, the following embodiments will introduce examples for various situations. In the following embodiments, if for 2G or 3G or LTE network, the first (second) network processing module may include a protocol stack processing module, a physical layer processing module, a radio frequency processing module, an antenna, etc.; wherein, the protocol stack processing module is used for Process related protocols (mainly protocols above the physical layer), the physical layer processing module is used to process the physical layer protocol, the radio frequency processing module is used for radio frequency processing, and the antenna is used for signal transmission and reception. Each of the above-mentioned modules can only process the business of a certain network, and can also process the business of multiple networks at the same time.

Embodiment three

The embodiment of the present invention is based on the foregoing embodiments, and the solution is specifically described by taking the first network as a 3G network and the second network as a 2G network.

Referring to Fig. 3, it is a schematic diagram of the embodiment of the present invention, and the left side among the figure is a terminal equipment (as mobile phone), and this terminal comprises 3G module, 2G module, network identification module, as SIM card or USIM card and other related modules. Among them, the 3G module is preferentially used to complete real-time services, comparing the loads of the 2G network and the 3G network, when the load of the 3G network is low, the 3G module is preferentially used to complete non-real-time services. When the 2G network load is low, the 2G module is preferentially used to complete non-real-time services. When the 2G or 3G module executes related services, it also needs to interact with some network elements. These network elements can all use existing network elements.

It can be understood that the above-mentioned priority selection of 2G or 3G network is carried out under the condition that the communication quality of each network can meet the business requirements. If the quality of a network cannot meet the business requirements, it can be decided according to the needs of business operations. Switching from one network to another, for example, switching real-time services from a 3G network to a 2G network.

When judging the quality of network communication, different conditions can be set according to different networks and different services for judgment. For example, when real-time services are switched from the second network to the first network, a judgment condition is used to switch from the first network to the second network. When using another judgment condition.

In the embodiment of the present invention, since a terminal 2G module and a 3G module use the same SIM card when accessing the 2G network and the 3G network, when processing 2G or 3G-related services, conflicts may occur due to simultaneous access to the SIM card, so , it is necessary to deal with these conflicts by changing the data storage address accessed.

For example, the "location area identifier" and "routing area number" of the network are respectively stored in the SIM card, and a complete routing area identifier is composed of "location area identifier" + "routing area number". When a terminal accesses 2G and 3G networks at the same time, the 2G location area ID and the 3G location area ID are usually different (the network can also be configured to be the same), so there may be two different location area IDs, and the SIM card only One of the location area identifiers can be stored. Therefore, special processing is required for the other location area identifier, including: determining which network location area identifier and routing area number to store in the SIM card. For example, it is assumed that the SIM card stores the 2G network location area ID and routing area number; when the location area of the 2G network is updated, the terminal will write the location area ID of the 2G network to the SIM card; when the routing area of the 3G network is updated, the terminal will not write the location area to the SIM card ID and routing area number, but the mobile phone directly saves the complete routing area ID in the dynamic memory or fixed memory of the mobile phone. When the subsequent routing area is changed, the routing area identification stored in the mobile phone is directly used instead of the routing area identification stored in the SIM card, and the routing area identification stored in the SIM card is not used when the mobile phone is turned on.

In the embodiment of the present invention, by disposing the real-time service preferentially on the 3G network, the characteristics of fast data transmission rate and small delay of the 3G network can be utilized to carry out services such as real-time streaming media and video conferencing, so the quality of the service can be guaranteed; at the same time , and configure non-real-time services preferentially on networks with lower loads, which can balance network loads and improve user experience. As an option, according to the needs of business operation, when the communication quality of a certain network cannot meet the business requirements, the business can be switched to another network, so that the corresponding business can be maintained.

In the embodiment of the present invention, in the process of processing the above method, the hardware of the terminal device can also be designed through various methods, and different methods can be used according to different hardware structures to complete the above processing flow. The following will discuss with examples:

2G/3G protocol stack processing module + 3G radio frequency processing module + 2G protocol stack processing module + 2G radio frequency processing module;

Referring to Figure 4, it is a schematic diagram of the scheme. In this technical solution, there are two protocol stack processing modules, namely a 2G/3G protocol stack processing module and a 2G protocol stack processing module. The protocol stack processing module here is used to process 2G or 3G related communication protocols, wherein the 2G/3G protocol stack processing module can process both 2G protocol and 3G protocol; and the 2G protocol stack processing module only processes 2G protocol.

In terms of specific implementation, these protocol stack processing units can be regarded as some specific programs running on the processing chip. These programs are used to complete the processing of 2G or 2G/3G communication protocols. Generally, these protocols are located on the physical layer protocol. Of course, the embodiment of the present invention does not limit the protocol stack processing unit to add some protocol processing of the physical layer, and those skilled in the art can perform flexible processing according to the actual situation.

In this technical solution, the 2G/3G protocol stack processing module can process 2G or 3G related communication protocols respectively, but only one of them can be processed at the same time. The process defined by the standard is switched.

Referring to Figure 4, the embodiment of the present invention also includes a 2G physical layer processing module and a 2G radio frequency processing module, wherein the 2G physical layer processing module is connected with the 2G protocol stack processing module and the 2G/3G protocol stack processing module, and is simultaneously connected with the 2G radio frequency processing module Connected to process the 2G physical layer protocol; the 2G radio frequency processing module is used to complete the modulation or demodulation of the signal, and receive or send the signal through the 2G antenna. The 2G physical layer processing module can receive signals from the 2G radio frequency processing module for processing, and can also send processed signals to the 2G radio frequency processing module.

Referring to Fig. 4, the embodiment of the present invention also includes 3G physical layer processing module and 3G radio frequency processing module, wherein, 3G physical layer processing module is connected with 2G/3G protocol stack processing module and 3G radio frequency processing module, is used for 3G physical layer protocol Processing; the 3G radio frequency processing module is used to complete the modulation or demodulation of the signal, and receive or send the signal through the 3G antenna. The 3G physical layer processing module can receive signals from the 2G/3G protocol stack processing module for processing, and can also send processed signals to the 3G radio frequency processing module.

The above-mentioned 2G physical layer processing module or 3G physical layer processing module interacts with each protocol stack processing module in a bidirectional manner, which can receive data from the relevant protocol stack processing modules and send data to the relevant protocol stacks. In the actual example of the present invention, the functions of the protocol stack processing module and the physical layer processing module are not strictly distinguished, and those skilled in the art can make flexible adjustments according to actual conditions.

Based on the design of the above-mentioned functional modules, the method for realizing network selection in the embodiment of the present invention is as follows: when it is judged that the 2G network load is low, the 2G protocol stack processing module preferentially configures non-real-time services on the 2G network, and the 2G physical layer processing module , 2G radio frequency processing module, and 2G antenna to complete the non-real-time service, such as data text service.

The 2G/3G protocol stack processing module prioritizes real-time services on the 3G network, and completes real-time services (such as video conference services) through the 3G physical layer processing module, 3G radio frequency processing module and 3G antenna. Since the transmission speed of the 3G network is faster and the delay is smaller, the real-time service is preferentially configured on the 3G network, which can ensure the data transmission rate and delay requirements of the real-time service and improve user experience.

When the 2G/3G protocol stack processing module finds that the communication quality of the 3G network cannot meet the real-time service requirements (such as signal degradation caused by insufficient network coverage or failure), it can cooperate with the 2G physical layer processing module through the 2G/3G protocol stack processing module , 2G radio frequency processing module and 2G antenna execute real-time business processes in the 2G network. Subsequently, if the communication quality of a certain network returns to normal, return to the original network to perform corresponding services.

Referring to Fig. 4, in the embodiment of the present invention, the SIM proxy module is used for, when the 2G protocol stack processing module and the 2G/3G protocol stack processing module need to access the SIM card of the terminal device when executing related business processes, the two protocols The access of the stack module is processed so that it accesses the SIM card serially according to the request order, so as to avoid conflicts that may be caused by simultaneous access.

In the embodiment of the present invention, the above-mentioned modules are functionally limited logic modules, which can be understood as several relatively independent software modules. In actual use, these modules are not strictly distinguished. It can be realized by a protocol stack module, and some functions of the protocol stack module can also be realized by a physical layer processing module.

When implemented by hardware, the function of one of the modules can be completed by multiple processing chips, or the functions of multiple modules can be completed by one chip. In practical applications, due to factors such as cost, performance, and technology, one chip is generally used to implement the functions of multiple modules. The chip type can be CPU, DSP, FPGA, or a chip with similar functions.

In the embodiment of the present invention, because the 2G/3G protocol stack processing module can adopt the standard 2G/3G interoperability process when switching the business from the 3G network to the 2G network or returning to the 3G network, there is no need for existing 2G and 3G networks. direct impact.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. A network selection method under the coexistence of multiple networks, characterized in that, based on a multi-mode terminal device, the multi-mode terminal device stores information related to the first network and the second network, and the related information includes at least network Data transmission rate information and network load information, the multi-mode terminal compares the data transmission rate information and load information of the two networks; the method includes the following steps: Judging the service type that the terminal is about to initiate or receive, the service type includes real-time service and non-real-time service; For real-time services, the multi-mode terminal preferentially selects a network with a high data transmission rate, and preferentially carries real-time services through the network with a high data transmission rate; If the communication quality of the currently preferred network does not meet the requirements of the real-time service, switch to another network, and carry the real-time service through another network. For the non-real-time service, the UE preferentially selects a network with a small load, and preferentially carries the non-real-time service through the network with a small load. 2. The method according to right 1, further comprising: For the network whose data transmission rate is relatively high and whose communication quality does not meet the real-time service requirements, when the communication quality is restored to meet the real-time service requirements, the multi-mode terminal equipment is switched back to the network, and the network carries the The real-time business. 3. The method according to right 1, further comprising: The multi-mode terminal device includes a SIM card, stores the related information, and processes services that need to access the SIM card, so that the services do not conflict; Or, when the SIM card cannot store the specific relevant information, store the relevant information through a third-party memory. 4. The method of claim 1, further comprising: The real-time service and the non-real-time service are processed so that there is no conflict in the service. 5. The method according to claim 1, wherein the first network is a 2G network, and the second network is a 3G network. 6. The method according to claim 1, wherein the first network is a 3G network, and the second network is a 2G network. 7. The method according to claim 1, wherein the first network and the second network periodically update the relevant information to the multi-mode terminal device through system messages. 8. A multi-mode terminal device, comprising: a network identification module, configured to store information related to the first network and the second network, the related information at least including network data transmission rate information and network load information; The network identification module also compares the data transmission rate information and load information of the two networks; A business judging module, configured to judge the type of business that the terminal is about to initiate or receive, and the business type includes real-time business and non-real-time business; The first network processing module is configured to select the first network when the output information of the network identification module indicates that the data transmission rate of the first network is high, and preferentially carry real-time services through the first network; When the output information of the network identification module indicates that the load of the first network is low, select the first network, and preferentially carry non-real-time services through the first network; The second network processing module is configured to select the second network and preferentially carry real-time services through the second network when the output information of the network identification module indicates that the data transmission rate of the second network is high; When the output information of the network identification module indicates that the load of the second network is low, select the second network, and preferentially carry non-real-time services through the second network; An adaptation module, configured to switch the terminal to another network and carry the real-time service through another network when the communication quality of the network with a high data transmission rate does not meet the requirements of the real-time service; the adaptation module It is also used for: processing the PS domain service and the CS domain service, so that the services do not conflict. The first network is a 2G network, and the second network is a 3G network; The first network processing module includes: a 2G protocol stack processing module, a 2G physical layer processing module, a 2G radio frequency processing module, and a 2G antenna; the 2G protocol stack processing module is used to process 2G protocols; The second network processing module includes: a 2G/3G protocol stack processing module, a 3G physical layer processing module, a 3G radio frequency processing module, and a 3G antenna; the 2G/3G protocol stack processing module is used to process 2G protocols and 3G protocols; When the communication quality of the 3G network does not meet the real-time service requirements, the adaptation module switches the terminal device to the 2G network through a process defined by the standard, and communicates with the 2G physical layer processing module, the The 2G radio frequency processing module and the 2G antenna process the real-time service together; Or, the first network is a 3G network, and the second network is a 2G network; The first network processing module includes: a 2G/3G protocol stack processing module, a 3G physical layer processing module, a 3G radio frequency processing module, and a 3G antenna; the 2G/3G protocol stack processing module is used to process 2G protocols and 3G protocols; The second network processing module includes: a 2G protocol stack processing module, a 2G physical layer processing module, a 2G radio frequency processing module, and a 2G antenna; the 2G protocol stack processing module is used to process 2G protocols; When the communication quality of the 3G network does not meet the real-time service requirements, the adaptation module switches the terminal device to the 2G network through a process defined by the standard, and communicates with the 2G physical layer processing module, the The 2G radio frequency processing module and the 2G antenna process the real-time service together; The terminal device periodically receives system messages sent by the first network and the second network to update the stored relevant information. 9. The multimode terminal device according to claim 8, characterized in that: For the network with high data transmission rate and communication quality that does not meet the real-time service requirements, when the communication quality is restored to meet the real-time service requirements, the multi-mode terminal device switches back to the network, and the network carries the Describe real-time business. 10. The terminal device according to claim 8, wherein the network identification module of the multimode terminal device can be a SIM card; the terminal device also includes: The SIM agent module is used to process the service of accessing the SIM card, so that the accessed service will not conflict; or, When the SIM card cannot store specific relevant information, the relevant information is stored through a third-party memory.

Images