CN103731907A - Network selection method based on multi-network convergence and multi-mode terminal device - Google Patents
Network selection method based on multi-network convergence and multi-mode terminal device Download PDFInfo
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Abstract
The embodiment of the invention discloses a network selection method based on multi-network convergence and a multi-mode terminal device. The multi-model terminal device stores and compares network data transmission rate information and network load information of a first network and second network; types of services to be launched or received by the terminal device are judged, wherein the services comprise the real-time services and the non-real-time services; as for the real-time services, networks with high data transmission rates are optimally selected by the multi-mode terminal, and if communication quality of the current optimally-selected networks can not meet requirements of the real-time services, the current optimally-selected network is switched to another network, and the real-time services are carried by the other network; as for the non-real-time services, networks with small loads are optimally selected by UE. By means of the method, the quality of the real-time services can be guaranteed, network loads can be balanced, and user experience can be improved.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a method for selecting a network by a multi-mode terminal in a multi-network coexistence environment and a multi-mode terminal device.
Background
Currently, wireless communication technology is rapidly developed, and from 2G, 3G, to LTE (Long Term Evolution), WiMax (world Interoperability For Microwave Access), etc., wireless communication systems have greatly improved performance in terms of data transmission speed, system capacity, time delay, etc. Many countries in the world support wireless communication networks of many different standards, and therefore, a situation occurs in which many different heterogeneous networks collectively cover a certain area. These networks are characterized by certain differences in coverage, data rates provided, types of services available, etc., e.g., some networks are capable of providing high-speed data transmission services, while some networks support low-rate data transmission services and CS domain voice services.
Currently, the selection of a network in a multi-network coexistence situation is mainly based on the signal quality of the network. Taking 2G networks and 3G networks as examples, the prior art adopts the following method to solve the above problems: for the current 2G/3G dual-mode terminal, User Equipment (UE) preferentially resides in a 3G network, related services are carried out on the 3G network, the UE is switched to the 2G network when the quality of the 3G network is reduced to a certain threshold value, and the UE is switched to the 3G network when the network quality of the 3G network meets the certain threshold value.
Since 2G and 3G are respectively suitable for different services, the selection of the cell is performed only by the signal quality, which affects the service experience of the user. Therefore, for a multi-mode terminal capable of simultaneously supporting multiple network systems, how to select one network from multiple supported heterogeneous networks to carry corresponding services meets the service requirements of users, improves the experience of the users, and becomes a problem to be solved urgently.
Disclosure of Invention
The embodiment of the invention provides a network selection method and multimode terminal equipment under the condition of coexistence of multiple networks, which are used for ensuring the service quality of real-time services, balancing network loads and improving user experience, wherein the method comprises the following steps:
the network selection method under the condition of multi-network coexistence is applied to a multi-mode user terminal UE, the multi-mode UE stores the related information of a first network and a second network, the related information at least comprises network data transmission rate information and network load information, and the UE compares the data transmission rate information and the load information of the two networks; the method comprises the following steps:
judging the service types to be initiated or received by the terminal, wherein the service types comprise real-time services and non-real-time services;
for real-time services, the UE preferentially selects a network with high data transmission rate, and preferentially carries the real-time services through the network with high data transmission rate;
and if the communication quality of the network selected by priority currently does not meet the requirement of the real-time service, switching to another network, and carrying the real-time service through the other network.
For the non-real-time service, the UE preferentially selects a network with a smaller load, and preferentially carries the non-real-time service through the network with the smaller load.
The multimode terminal device supporting communication over a first network and a second network, the terminal device comprising:
a network identification module for storing information related to the first network and the second network, wherein the related information at least comprises network data transmission rate information and network load information; the network identification module also compares the data transmission rate information and the load information of the two networks;
the service judging module is used for judging the service type to be initiated or received by the terminal, wherein the service type comprises a real-time service and a non-real-time service;
the first network processing module is used for selecting the first network and preferentially bearing 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 higher; when the output information of the network identification module indicates that the load of the first network is low, selecting the first network and preferentially bearing the non-real-time service through the first network;
the second network processing module is used for selecting the second network and preferentially bearing 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 higher; when the output information of the network identification module indicates that the load of the second network is low, selecting the second network and preferentially bearing the non-real-time service through the second network;
and the adaptation module is used for switching the terminal to another network when the network communication quality with higher data transmission rate does not meet the real-time service requirement, and carrying the real-time service through the other network.
The technical scheme has the following advantages that:
in addition, because the requirements of the non-real-time service on the data transmission rate and the time delay are lower, the network with the lower load is preferentially selected for carrying the non-real-time service; the load of each network can be balanced, the congestion condition of the network is reduced, and the reduction or interruption of the service quality is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a flow chart of a method of an 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 Description
The present invention will be described in further detail below with reference to the accompanying drawings.
Example one
The embodiment of the invention provides a network selection method under the condition of coexistence of multiple networks, which is applied to a multimode-based user terminal UE (user equipment), wherein the UE is used for storing information related to a first network and a second network, and the related information at least comprises network data transmission rate information and network load information; referring to fig. 1, the method includes the following steps:
s10, determining the service type;
s11, for the real-time service, selecting a first network, and preferentially bearing the real-time service through the first network;
s12, for the non-real-time service, selecting a second network, and preferentially bearing the non-real-time service through the second network;
and S13, when the communication quality of the first network does not meet the requirement of the real-time service, the UE switches the network and bears the real-time service through the second network.
The embodiment of the invention can be executed by multimode terminal equipment, the terminal equipment comprises an SIM card, the SIM card is a generalized SIM card, namely the SIM card which generally has the functions of storing user related information and finishing communication related functions such as authentication, encryption and the like can be regarded as the SIM card in the embodiment of the invention, for example, the SIM card can be an SIM card in a 2G network or a USIM card in 3G and LTE networks.
The real-time service is a service requiring real-time data interaction, and the non-real-time service is a service which does not need real-time response when being accessed. The first network and the second network can periodically update the related information to the multimode terminal through system information so as to ensure that the multimode terminal obtains the latest related information.
In the embodiment of the present invention, selecting a first network to carry a real-time service and selecting a second network to carry a non-real-time service refers to: real-time or non-real-time services are realized based on the first network or the second network, such as real-time streaming media services, video conferences and the like are realized through the first network; background and conversational class services, etc., are implemented over the second network. Real-time or non-real-time traffic can be carried through the first or second network by camping or handing over the UE to 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, and the quality of the communication between the first network and the second network and the speed of data transmission are both relative, so the specific forms of the first network and the second network are also relative. For example, the first network may be a 3G network or WLAN or LTE or WiMAX etc. and the second network may be a 2G network. Since the 2G network has been subjected to large-scale application for a long time, the network coverage is wide, the communication quality is also good, but the data transmission rate is lower compared with the 3G network and the like. Or, the second network may also be a 3G network, and when the second network is a 3G network, the first network may be WLAN, LTE, WiMAX, or the like; that is, after the 3G network is applied in a large scale, a fourth generation communication network (LTE) needs to be deployed, and then the 3G network has a better communication quality than the LTE network but a slower data transmission than the LTE network because the 3G network has a long application time and a wide network coverage compared to the LTE network; of course, the first network may also be a 2G network, and the second network may be WLAN, LTE, WiMAX, or the like.
It should be noted that the first network and the second network in the embodiment of the present invention do not represent that they only process the traffic of "one" first network and the traffic of "one" second network, but should be understood as not limiting the number of the network types specifically supported. As may be supported by multiple networks including 2G, 3G, LTE; at this time, one of 2G or 3G may be selected as the first network; one of 3G (this may be selected when the first network is 2G) or LTE (this may be selected when the first network is either 2G or 3G) is selected as the second network.
In the embodiment of the invention, the related information of the network can be stored through the SIM card. Meanwhile, when the SIM card cannot store the parameter information of a specific network, the parameter information is stored through a third-party storage (such as a memory or a flash).
In the embodiment of the present invention, because two types of services relate to two networks, when the UE initiates or receives two types of services, a conflict may also occur when accessing resources (e.g., when accessing simultaneously), and therefore, the real-time or non-real-time services also need to be processed, so that the services do not conflict, for example, resources that need to be accessed simultaneously are accessed in a round robin or notification manner.
In the embodiment of the invention, the first network is preferentially selected to bear the real-time service, and the non-real-time service is configured in the second network, so that the real-time service can be completed by utilizing the characteristic of high-speed data transmission of the first network, meanwhile, the non-real-time service can be completed by utilizing the characteristic of small load of the second network, and the network load is balanced, so that a user does not need to reselect and switch between 2G and 3G in a using process under a general condition, a condition that a service terminal or service quality is reduced in the reselecting or switching process can not occur, and the user experience is improved.
Further, in the embodiment of the present invention:
and when the communication quality of the first network does not meet the real-time service requirement and the second network can bear the real-time service, switching the UE to the second network, and bearing the real-time service by the second network. The scheme is an alternative scheme, if the second network has the capability of carrying the real-time service, the steps can be executed, and when the communication quality of the first network does not meet the requirement of the real-time service, the second network is switched. If the second network does not have the capability 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 can be evaluated by referring to various parameters according to actual conditions. For example, it may be determined whether the signal strength of the network meets a certain threshold, so as to determine whether the network quality can meet the service requirement, and if the signal strength is lower than the certain threshold, it may be determined that the network communication quality cannot meet the service requirement, and network handover is required. When the network communication quality is judged, different conditions can be set according to different networks and different services respectively for judgment, such as that one judgment condition is used when real-time service is switched from a first network to a second network, and the other judgment condition is used when the second network is switched from the first network.
In addition, in the embodiment of the present invention, when the network communication quality is recovered, the related service may be switched back to the original network, for example, the real-time service is switched from the second network to the first network, and the first network carries the real-time service.
It is understood that the real-time service preference selecting first network and the non-real-time service preference selecting second network are performed under the condition that the communication quality of the respective networks can meet the service requirement. In practical application, if the communication quality of a certain network can not meet the requirement of a service, whether the communication quality of another network can meet the requirement of the service is judged, and if yes, switching is selected; otherwise, no handover is performed.
By the method, when the communication quality of a certain network cannot meet the related service requirement, the related service can be processed by another network, so that the execution of the service can be continuously ensured.
Example two
The terminal device in the embodiment of the present invention includes a network identification module 201, such as an SIM card, for storing information related to a first network and a second network, where the related information at least includes network data transmission rate information and network load information, and the network identification module further compares the data transmission rate information and the load information of the two networks, where the data transmission rate of the first network is greater than that of the second network, and the load of the second network is less than that of the first network; for specific description of the first network and the second network, reference may be made to the description of relevant parts in the first embodiment, and details are not described here.
A service judging module 202, configured to judge a service type to be initiated or received by a terminal, where the service type includes a real-time service and a non-real-time service;
the first network processing module 203 is configured to select the first network and preferentially carry a real-time service through the first network when the output information of the network identification module indicates that the data transmission rate of the first network is high;
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 load the non-real-time service through the second network;
an adapting module 205, configured to, when the first network communication quality does not meet the real-time service requirement, enable the terminal to switch to a second network, and carry the real-time service through the second network.
The embodiment of the invention also comprises the following steps: the SIM agent module 206 is configured to process a service accessing the SIM card, so that the accessed service does not conflict; or when the SIM card can not store specific parameter information, storing the parameter information through a third-party memory.
When the real-time service is carried (processed and executed) through the first network, the first network processing module 203 completes the relevant service processing function; when the non-real-time service is carried through the second network, the second network processing module 204 completes the corresponding service processing function. The first network processing module 203 and the second network processing module 204 are connected to the network identification module 201 to complete the corresponding processes.
It should be noted that, the above several units are modules divided in functionality, and they are not strictly limited to each other, for example, for the adaptation module, it may also be considered that the function may be completed by the first network processing module, the second network processing module, or other modules. Meanwhile, the specific implementation of these modules is also not limited in the embodiments of the present invention, and can be generally completed by related hardware chips (such as CPU and DSP) and running corresponding software, and each module can be completed by using the same chip or different chips, which is not limited herein in the embodiments of the present invention.
Since the first network and the second network have different specific forms, the following embodiments will be described by way of example for various situations. In the following embodiments, if directed to a 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.; the protocol stack processing module is used for processing related protocols (mainly protocols above a physical layer), the physical layer processing module is used for processing the physical layer protocols, the radio frequency processing module is used for carrying out radio frequency processing, and the antenna is used for sending and receiving signals. The modules can only process the service of a certain network, and can also process the services of a plurality of networks simultaneously.
EXAMPLE III
Based on the above embodiments, the present invention specifically explains the scheme with the first network being a 3G network and the second network being a 2G network.
Referring to fig. 3, which is a schematic diagram of an embodiment of the present invention, a terminal device (e.g., a mobile phone) is shown on the left side of the figure, where the terminal device includes a 3G module, a 2G module, a network identification module, such as a SIM card or a USIM card, and other related modules. The 3G module is preferentially used for completing real-time services, the loads of the 2G network and the 3G network are compared, and when the load of the 3G network is lower, the 3G module is preferentially used for completing non-real-time services. When the load of the 2G network is low, the 2G module is preferentially used for completing the non-real-time service. When the 2G or 3G module executes the relevant service, some network elements also need to be interacted. These network elements may all be existing network elements.
It is understood that the above-mentioned preference selection of 2G or 3G network is performed under the condition that the communication quality of each network can meet the service requirement, and if the quality of one network cannot meet the service requirement, it can be determined whether to switch from one network to another network according to the service operation requirement, for example, to switch the real-time service from the 3G network to the 2G network.
When the network communication quality is judged, different conditions can be set according to different networks and different services respectively for judgment, such as that one judgment condition is used when real-time service is switched from the second network to the first network, and the other judgment condition is used when the real-time service is switched from the first network to the second network.
In the embodiment of the present invention, since one terminal 2G module and one terminal 3G module use the same SIM card when accessing a 2G network and a 3G network, when processing 2G or 3G related services, conflicts may be caused by accessing the SIM cards at the same time, and therefore, the conflicts need to be processed by changing the access data storage address.
For example, the SIM card stores the "location area identifier" and the "routing area number" of the network, and a complete routing area identifier is composed of the "location area identifier" + "routing area number". When the terminal accesses the 2G and 3G networks simultaneously, the location area id of the 2G and the location area id of the 3G are usually different (the networks may also be configured to be the same), so that there may exist two different location area ids, and the SIM card can only store one of the location area ids, therefore, it needs to perform special processing on the other location area id, including: determining which network's location area identity and routing area number is stored in the SIM card, e.g. it is assumed here that the SIM card stores the location area identity and routing area number of a 2G network; after the location area of the 2G network is updated, the terminal writes the 2G network location area identification into the SIM card; after the routing area of the 3G network is updated, the position area identification and the routing area number are not written into the SIM card, but the mobile phone directly stores the complete routing area identification in a dynamic memory or a 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, the routing area identification stored in the SIM card is not used, and the routing area identification stored in the SIM card is not used when the mobile phone is started.
In the embodiment of the invention, by preferentially configuring the real-time service in the 3G network, the characteristics of high data transmission rate and small delay of the 3G network can be utilized to carry out services such as real-time streaming media, video conference and the like, so that the quality of the services can be ensured; meanwhile, the non-real-time service is preferentially configured in the network with lower load, so that the network load can be balanced, and the user experience degree is improved. Optionally, according to the requirement of service operation, when the communication quality of a certain network cannot meet the service requirement, the service may be switched to another network, so that the corresponding service may be maintained.
In the embodiment of the present invention, in the process of processing the method, hardware of the terminal device may be designed by a plurality of methods, and the processing flow is completed by adopting different methods according to different hardware structures, which will be discussed below by way of example:
the system comprises a 2G/3G protocol stack processing module, a 3G radio frequency processing module, a 2G protocol stack processing module and a 2G radio frequency processing module;
fig. 4 is a schematic diagram of this scheme. In the technical scheme, two protocol stack processing modules are provided, namely a 2G/3G protocol stack processing module and a 2G protocol stack processing module. The protocol stack processing module is used for processing 2G or 3G related communication protocols, wherein the 2G/3G protocol stack processing module can process 2G protocols and can also process 3G protocols; and the 2G protocol stack processing module only processes the 2G protocol.
In a specific implementation, the protocol stack processing units may be regarded as some specific programs running on the processing chip, and the programs are used for completing processing of 2G or 2G/3G communication protocols, which are generally protocols located above a physical layer protocol.
In the technical scheme, the 2G/3G protocol stack processing module can process 2G or 3G related communication protocols respectively, but only one of the protocols can be processed at the same time, and meanwhile, when the 2G/3G protocol stack processing module switches networks, a standard defined flow is adopted for switching.
Referring to fig. 4, the embodiment of the present invention further includes a 2G physical layer processing module and a 2G radio frequency processing module, where the 2G physical layer processing module is connected to the 2G protocol stack processing module and the 2G/3G protocol stack processing module, and is connected to the 2G radio frequency processing module, and is configured to process a 2G physical layer protocol; the 2G radio frequency processing module is used for completing modulation or demodulation of signals and receiving or sending the signals through the 2G antenna. The 2G physical layer processing module may receive a signal from the 2G radio frequency processing module for processing, and may also send the processed signal to the 2G radio frequency processing module.
Referring to fig. 4, the embodiment of the present invention further includes a 3G physical layer processing module and a 3G radio frequency processing module, where the 3G physical layer processing module is connected to the 2G/3G protocol stack processing module and the 3G radio frequency processing module, and is configured to process a 3G physical layer protocol; the 3G radio frequency processing module is used for completing modulation or demodulation of signals and receiving or sending the signals through the 3G antenna. The 3G physical layer processing module may receive a signal from the 2G/3G protocol stack processing module for processing, and may also send the processed signal to the 3G radio frequency processing module.
The interaction between the 2G physical layer processing module or the 3G physical layer processing module and each protocol stack processing module is bidirectional, and the data from the relevant protocol stack processing module can be received, and the data can be sent to the relevant protocol stack. In the practical 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 flexibly adjust the functions according to practical situations.
Based on the design of the functional modules, the method for realizing network selection in the embodiment of the invention comprises the following steps: when the load of the 2G network is judged to be low, the 2G protocol stack processing module preferentially configures the non-real-time service in the 2G network, and completes the non-real-time service, such as a data text service, through the 2G physical layer processing module, the 2G radio frequency processing module and the 2G antenna together.
The 2G/3G protocol stack processing module preferentially resides the real-time service in the 3G network, and completes the real-time service (such as video conference service) through the 3G physical layer processing module, the 3G radio frequency processing module and the 3G antenna. Because the transmission speed of the 3G network is faster and the delay is smaller, the real-time service is preferentially configured in the 3G network, the requirements of the data transmission rate and the time delay of the real-time service can be met, and the user experience is improved.
When the 2G/3G protocol stack processing module finds that the communication quality of the 3G network cannot meet the real-time service requirement (for example, signal degradation caused by insufficient network coverage or failure), the 2G/3G protocol stack processing module can cooperate with the 2G physical layer processing module, the 2G radio frequency processing module and the 2G antenna to execute the real-time service flow in the 2G network. And if the communication quality of a certain network is recovered to be normal, returning to the original network to execute corresponding services.
Referring to fig. 4, the SIM agent module in the embodiment of the present invention is configured to, when the 2G protocol stack processing module and the 2G/3G protocol stack processing module execute a related service flow and need to access the SIM card of the terminal device, process accesses of the two protocol stack modules, so that the two protocol stack modules serially access the SIM card according to a request sequence, so as to avoid a collision possibly caused by simultaneous accesses.
In the embodiment of the present invention, each of the modules is a logic module with limited functionality, and may be understood as several relatively independent software modules, and in actual use, the modules are not strictly distinguished, for example, the function of using the adaptation module may also be implemented by a protocol stack module, and part of the functions of the protocol stack module may also be implemented by a physical layer processing module, and the like.
When the hardware implementation is used, the functions of one of the modules may be respectively completed by a plurality of processing chips, or the functions of a plurality of the modules may be completed by one chip. In practical applications, for reasons of cost, performance, technology, etc., one chip is generally used to implement functions of a plurality of modules, and the chip type may be a CPU, a DSP, an FPGA, or a chip with similar functions.
In the embodiment of the invention, because the 2G/3G protocol stack processing module can adopt a standard 2G/3G interoperation flow when the 2G network is switched from the 3G network or the service returns to the 3G network, the existing 2G and 3G networks are not directly influenced.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A network selection method under the condition of coexistence of multiple networks is characterized in that based on a multimode terminal device, the multimode terminal device stores the related information of a first network and a second network, the related information at least comprises network data transmission rate information and network load information, and the multimode terminal compares the data transmission rate information and the load information of the two networks; the method comprises the following steps:
judging the service types to be initiated or received by the terminal, wherein the service types comprise real-time services and non-real-time services;
for real-time services, the multi-mode terminal preferentially selects a network with high data transmission rate, and preferentially carries the real-time services through the network with high data transmission rate;
and if the communication quality of the network selected by priority currently does not meet the requirement of the real-time service, switching to another network, and carrying the real-time service through the other network.
For the non-real-time service, the UE preferentially selects a network with small load, and preferentially bears the non-real-time service through the network with small load.
2. The method of claim 1, further comprising:
and for the network with higher data transmission rate and with communication quality not meeting the real-time service requirement, when the communication quality of the network is recovered to meet the real-time service requirement, the multi-mode terminal equipment is switched back to the network, and the network bears the real-time service.
3. The method of claim 1, further comprising:
the multimode terminal equipment comprises an SIM card, stores the related information and processes the service needing to access the SIM card, so that the service can not conflict;
or, when the SIM card cannot store the specific related information, storing the related information through a third-party memory.
4. The method of claim 1, further comprising:
and processing the real-time service and the non-real-time service, so that the services do not conflict.
5. The method of claim 1, wherein the first network is a 2G network and the second network is a 3G network.
6. The method of claim 1, wherein the first network is a 3G network and the second network is a 2G network.
7. The method of claim 1, wherein the first network and the second network periodically update the related information to the multimode terminal device via system messages.
8. A multimode terminal device, characterized in that it comprises: a network identification module for storing information related to the first network and the second network, wherein the related information at least comprises network data transmission rate information and network load information; the network identification module also compares the data transmission rate information and the load information of the two networks;
the service judging module is used for judging the service type to be initiated or received by the terminal, wherein the service type comprises a real-time service and a non-real-time service;
the first network processing module is used for selecting the first network and preferentially bearing 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 high; when the output information of the network identification module indicates that the load of the first network is low, selecting the first network and preferentially bearing the non-real-time service through the first network;
the second network processing module is used for selecting the second network and preferentially bearing 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, selecting the second network and preferentially bearing the non-real-time service through the second network;
the adaptation module is used for switching the terminal to another network when the network communication quality with high data transmission rate does not meet the real-time service requirement, and carrying the real-time service through the other network; the adaptation module is further configured to: and 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 comprises: the system comprises 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 for processing a 2G protocol;
the second network processing module comprises: the system comprises 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 for processing a 2G protocol and a 3G protocol;
when the communication quality of the 3G network does not meet the real-time service requirement, the adaptation module switches the terminal device to the 2G network through a process defined by a standard, and processes the real-time service together with the 2G physical layer processing module, the 2G radio frequency processing module and the 2G antenna;
or, the first network is a 3G network, and the second network is a 2G network;
the first network processing module comprises: the system comprises 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 for processing a 2G protocol and a 3G protocol;
the second network processing module comprises: the system comprises 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 for processing a 2G protocol;
when the communication quality of the 3G network does not meet the real-time service requirement, the adaptation module switches the terminal device to the 2G network through a process defined by a standard, and processes the real-time service together with the 2G physical layer processing module, the 2G radio frequency processing module and the 2G antenna;
the terminal equipment periodically receives system messages sent by the first network and the second network to update the stored related information.
9. The multimode terminal device of claim 8, wherein:
and for the network with high data transmission rate and communication quality not meeting the real-time service requirement, when the communication quality of the network is recovered to meet the real-time service requirement, the multi-mode terminal equipment is switched back to the network, and the network bears the real-time service.
10. The terminal device of claim 8, wherein the network identification module of the multi-mode terminal device can be a SIM card; the terminal device further includes:
the SIM agent module is used for processing the services accessing the SIM card so that the accessed services do not conflict; or,
and when the SIM card cannot store specific related information, storing the related information through a third-party memory.
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