WO2012130065A1

WO2012130065A1 - Network selection method and device

Info

Publication number: WO2012130065A1
Application number: PCT/CN2012/072674
Authority: WO
Inventors: 郑小春; 曾雪红; 夏庆凡
Original assignee: 华为技术有限公司
Priority date: 2011-04-01
Filing date: 2012-03-21
Publication date: 2012-10-04
Also published as: CN102158934A

Abstract

The present invention relates to the field of wireless communication. Disclosed are a network selection method and device, the method comprises: preferentially camping a CS domain service on a first network, and preferentially carrying the CS domain service via the first network (S11); preferentially camping a PS domain service on a second network, and preferentially carrying the PS domain service via the second network, the first network has a lower data transmission rate and better signal coverage when compared to the second network (S12); while establishing the PS domain service, reporting the ID of a single-card dual-standby terminal to the second network so that the second network issues a re-selection parameter for the single-card dual-standby terminal according to the ID of the single-card dual-standby terminal after receiving the ID of the single-card dual-standby terminal (S13); and re-selecting the PS domain service to the first network according to the reselection parameter for the single-card dual-standby terminal when the communication quality in the second network fails to meet the requirement of the PS domain service while carrying out PS domain service, (S14). The solution of the present invention solves the problem of unreachable service during network reselection of the terminal, thus ensuring service continuity during network reselection of the terminal, especially service continuity during network re-selection of PS service state for a single-card dual-standby terminal.

Description

Network selection method and device

The present invention relates to the field of wireless communications, and in particular, to a network selection method and device. Background technique

In the field of wireless communication technology, 2G (second generation) networks and 3G (third generation) networks are two networks that are widely used. The service based on the 2G network and the 3G network mainly includes a voice service and a data service, where the voice service is carried by a Circuit Switched Domain (CS domain), and the data service is performed by a Packet Switched Domain (PS Domain). Bearer, 2G network and 3G network support CS domain services and PS domain services. The above CS domain or PS domain can be understood as a set of hardware and software for handling CS domain services (such as voice services) or PS domain services (such as data services).

Since the 3G network is an emerging network compared to the 2G network, the bandwidth is larger than the 2G network, and the data service experience is better than the 2G network. However, the network coverage is generally not matured by the 2G network coverage. In actual use, there is often no 3G signal. Affects the user experience. In order to improve the user experience, existing 3G network terminals (such as 3G mobile phones) generally support 2G networks at the same time, so that when the 3G signal is poor, the 2G network is reselected. Here, the terminal that supports both the 2G network and the 3G network is called a "dual mode terminal" (such as WCDMA/GSM dual mode, TD-SCDMA/GSM dual mode mobile phone), in which a terminal of a SIM card is used. It is a "single card dual mode terminal".

Referring to FIG. 1, which is a schematic structural diagram of a single-card dual-mode terminal in the prior art, for the convenience of description, only a few main functional modules are listed here, including:

SIM card, SIM card proxy module, application, service adaptation module, 2G/3G protocol stack processing module, 2G/3G physical layer processing module, 2G/3G RF processing module and antenna, where:

The SIM card is used to store some information of the user, including the information of the user on the 2G network and the 3G network, where the SIM card may be a SIM card frequently used by the 2G network, or a more advanced US IM card;

The SIM card proxy module is used to proxy when the 2G/3G protocol stack processing module accesses the SIM card, so that it can access the corresponding 2G or 3G user information in the SIM card under 2G and 3G network conditions;

An application is a program in a terminal that is related to business or control;

The service adaptation module is used to connect the application and the 2G/3G protocol stack processing module, mainly for the 2G/3G protocol. The resident state of the stack, select the appropriate protocol stack to transport the service.

The 2G/3G protocol stack processing module is used to process 2G and 3G related protocols. The protocol here generally refers to a protocol above the physical layer, such as MAC/RLC/RRC.

The 2G/3G physical layer processing module is used to process 2G and 3G physical layer related protocols;

2G/3G RF processing module is used to complete the processing functions related to 2G and 3G RF modules;

The antenna performs the reception and transmission of the 2G and 3G signals.

In the process of implementing the present invention, the inventors have found that the prior art has at least the following disadvantages:

When an existing single-card dual-mode terminal is reselected from one network to another, there will be a period of time when the service is inaccessible, that is, the service will be interrupted during this period, whether it is a CS domain service or a PS domain. Business can't be done. Summary of the invention

In order to ensure the service continuity of the terminal during network reselection, the embodiment of the invention provides a network selection method and device. The technical solution is as follows:

An aspect of the present invention provides a network selection method, which is applied to a terminal based on a SIM card of a subscriber identity module, where the method includes:

The circuit-switched CS domain service is preferentially resident in the first network, and the CS domain service is preferentially carried by the first network;

Prefer the packet-switched PS domain service to the second network, and preferentially carry the PS domain service by using the second network; wherein, the first network has a lower data transmission rate and signal than the second network. Good coverage;

When the PS domain service is established, the single-card dual-standby terminal identifier is reported to the second network, so that the second network receives the single-card dual-standby terminal identifier, and then delivers the label according to the single-card dual-standby terminal identifier. a single-card dual-standby terminal reselection parameter; according to the single-card dual-standby terminal reselection parameter delivered by the second network, when the PS domain service is in progress, when the communication quality of the second network does not satisfy the PS domain When the service requires, the PS domain service is reselected to the first network.

Another aspect of the present invention provides a network selection method, including:

When the PS domain service is established, the single-card dual-standby terminal identifier reported by the single-card dual-standby terminal is received, and the single-card dual-standby terminal is a terminal based on a SIM card of a subscriber identity module, and the single-card dual-standby terminal performs circuit switching. The CS domain service preferentially resides in the first network, and the CS domain service is preferentially carried by the first network; the single card dual standby terminal preferentially camps on the packet switched PS domain service in the second network, preferentially passing the The second network carries the PS domain service; wherein, the first network has a lower data transmission rate and better signal coverage than the second network;

Receiving, by the single-card dual-standby identifier, the dual-standby terminal reselection parameter, so that the terminal receives the re-selection parameter After the PS domain service is performed, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network.

Another aspect of the present invention provides a single card dual standby terminal, wherein the single card dual standby terminal is a terminal based on a subscriber identity module SIM card, and the single card dual standby terminal includes:

a first network processing module, configured to preferentially camp on the circuit-switched CS domain service in the first network, and preferentially carry the CS domain service by using the first network;

a second network processing module, configured to preferentially relocate the packet switched PS domain service to the second network, and preferentially carry the PS domain service by using the second network; wherein, the first network is compared to the second network The network data transmission rate is low and the signal coverage is good;

The second network processing module is further configured to report a single card dual standby terminal identifier to the second network when the PS domain service is established, so that the second network receives the single card dual standby terminal identifier, according to the second network Sending a single card dual standby terminal reselection parameter by the single card dual standby terminal identifier;

The second network processing module is further configured to: according to the single card dual standby terminal reselection parameter delivered by the second network,

During the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network.

Another aspect of the present invention provides a network side device, where the network side device includes:

a receiving module, configured to receive a single-card dual-standby terminal identifier reported by the single-card dual-standby terminal when the PS-domain service is established, where the single-card dual-standby terminal is a terminal based on a SIM card of a subscriber identity module, and the single-card dual Waiting for the terminal to preferentially camp on the CS domain service in the first network, and preferentially carrying the CS domain service through the first network; the single card dual standby terminal preferentially camping on the packet switched PS domain service in the second network Preferably, the PS domain service is carried by the second network; wherein, the first network has a lower data transmission rate and better signal coverage than the second network;

a sending module, configured to send, according to the received single-card dual-standby identifier, a dual-standby terminal re-selection parameter, so that the terminal receives the re-selection parameter after performing the PS domain service, and when the second When the communication quality of the network does not meet the PS domain service requirement, the PS domain service is reselected to the first network.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

By preferentially camping on the CS domain service in the first network, the CS domain service is preferentially carried through the first network; the PS domain service is preferentially residing on the second network, and the PS domain service is preferentially carried through the second network, because the first network phase Compared with the second network signal coverage, the CS domain service (mainly voice service) can be greatly re-selected between different networks due to poor signal, thereby reducing the inaccessibility time of the CS domain service and improving the time. User experience of the CS domain service; At the same time, because the second network rate is transmitted faster, the PS domain service is preferentially carried through the second network, and the user can enjoy the high-speed PS domain service. In addition, in the embodiment of the present invention, when the PS domain service is established, the terminal reports the single-card dual-standby terminal identifier to the second network, so that the second network sends the single-card dual-standby terminal reselection parameter according to the single-card dual-standby terminal. The reselection parameter, in the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network, and the single card dual standby terminal is ensured in the PS service state network. Business continuity at the time of re-election. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative labor.

1 is a schematic structural diagram of a single card dual mode terminal provided by the prior art;

2 is a flowchart of a network selection method according to an embodiment of the present invention;

3 is a flowchart of a network selection method according to another embodiment of the present invention;

4 is an information interaction diagram of a network selection method according to another embodiment of the present invention;

FIG. 5 is an information interaction diagram of a network selection method according to another embodiment of the present invention; FIG.

6 is an information interaction diagram of a network selection method according to another embodiment of the present invention;

FIG. 7 is an information interaction diagram of a network selection method according to another embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a single card dual standby terminal according to another embodiment of the present invention; FIG.

FIG. 9 is a schematic structural diagram of a network side device according to another embodiment of the present invention. detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 2, an embodiment of the present invention provides a network selection method, which is applied to a terminal based on a SIM (Subscriber Identity Module) card, and the method includes:

S11: The CS domain service is preferentially camped on the first network, and the CS domain service is preferentially carried by the first network; S12: the PS domain service is preferentially residing on the second network, and the second network is preferentially carried by the second network. a PS domain service; wherein, the first network has a lower data transmission rate and better signal coverage than the second network;

S13: When the PS domain service is established, the single-card dual-standby terminal identifier is reported to the second network, so that the second network receives the single-card dual-standby terminal identifier, and then issues a bill according to the single-card dual-standby terminal identifier. Card dual standby terminal reselection parameters;

S 14: According to the single card dual standby terminal reselection parameter delivered by the second network, during the PS domain service process, when When the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network.

The communication quality of the second network does not satisfy the PS domain service requirement. When the signal of the serving cell in the second network is lower than the threshold 1, and the duration reaches the threshold 2, the communication quality of the second network is considered to be not The PS domain service requirement is met, and the threshold 1 and the threshold 2 are obtained by the single card dual standby terminal reselection parameter delivered by the second network.

It should be noted that, in this embodiment, the SIM card also includes the USIM (Universal Subscriber Identity).

Module, Global Subscriber Identity Module) card, because the basic functions of the two are similar (USIM can also be considered as an upgraded version of SIM), and the technologies related to SIM or USIM cards are familiar to those skilled in the art, therefore, here There is no strict distinction between the two. In addition, in this embodiment and the following embodiments, "reselection" refers to inter-system cell reselection initiated by the terminal autonomously during the PS service.

The embodiment of the present invention preferentially resides in the first network by using the CS domain service, and preferentially carries the CS domain service through the first network. The PS domain service preferentially resides in the second network, and the PS domain service is preferentially carried through the second network. The first network has better coverage than the second network signal, so that the CS domain service (such as voice service) can be greatly re-selected between different networks due to poor signal, thereby reducing the inaccessibility time of the CS domain service. The user experience of the CS domain service is improved. At the same time, because the second network rate is transmitted faster, the PS domain service is preferentially carried through the second network, and the user can enjoy the high-speed PS domain service.

In addition, in the embodiment of the present invention, when the PS domain service is established, the terminal reports the single-card dual-standby terminal identifier to the second network, so that the second network sends the single-card dual-standby terminal reselection parameter according to the single-card dual-standby terminal. The reselection parameter, in the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network, and the single card dual standby terminal is ensured in the PS service state network. Business continuity at the time of re-election. Referring to FIG. 3, another embodiment of the present invention provides a network selection method, which may be performed by a network side device, and the method includes:

S21: When establishing the PS domain service, receiving the single card dual standby terminal identifier reported by the single card dual standby terminal, the single card dual standby terminal is a terminal based on a subscriber identity module SIM card, and the single card dual standby terminal will circuit exchange The CS domain service preferentially resides in the first network, and the CS domain service is preferentially carried by the first network; the single-card dual-standby terminal preferentially camps on the packet switched PS domain service in the second network, and preferentially passes the second network bearer. The PS domain service; wherein, the first network has a lower data transmission rate and better signal coverage than the second network;

S22: The dual-standby terminal reselection parameter is sent according to the received single-card dual-standby identifier, so that after the terminal receives the re-selection parameter, the communication quality of the second network does not satisfy the When the PS domain service requires, the PS domain service is reselected to the first network.

In this embodiment, the single card dual standby terminal identifier reported by the single card dual standby terminal is received, according to the reported single card dual standby terminal. The dual-standby terminal reselection parameter is sent to enable the single-card dual-standby terminal to reselect parameters according to the single-card dual-standby terminal. In the process of performing the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, The PS domain service is reselected to the first network to ensure service continuity of the single card dual standby terminal in the PS service state network reselection.

In addition, the CS domain service is preferentially relocated on the first network by the terminal, and the CS domain service is preferentially carried by the first network; the PS domain service is preferentially residing on the second network, and the PS domain service is preferentially carried through the second network, because A network has better coverage than the second network signal, so that the CS domain service (such as voice service) can be greatly re-selected between different networks due to poor signal, thereby reducing the inaccessibility of the CS domain service and improving the time. The user experiences the CS domain service. At the same time, because the second network rate is transmitted faster, the PS domain service is preferentially carried through the second network, and the user can enjoy the high-speed PS domain service. Referring to FIG. 4, another embodiment of the present invention provides a network selection method, where the first network is a 2G network, the second network is a 3G network, and a single card dual standby terminal is sent to a single card dual standby terminal. Reselect parameters, the method includes the following steps:

100: The single-card dual-standby terminal preferentially resides in the first network in the CS domain, and preferentially carries the CS domain service through the first network, and preferentially resides in the second network in the PS domain service, and preferentially carries the PS domain service through the second network. (Not shown in Figure 4).

The single card dual standby terminal is a terminal based on a SIM card, and the SIM card is used to store information related to the first network and the second network.

The first network has a lower data transmission rate and better signal coverage than the second network. In this embodiment, the first network may be a 2G network, such as a GSM network, and the second network may be a 3G network, such as a TD-SCDMA network (referred to as TD network) or WCDMA (Wideband Code Division Multiple Access). Network, etc.

101: When the PS domain service is established, the single-card dual-standby terminal sends an RRC CONNECTION SETUP COMPLETE message to the second network, carrying the single-card dual-standby terminal identifier, as follows:

The first type, for the GSM/TD single-card dual-standby terminal, the UE radio access capability in the RRC CONNECTION SETUP COMPLETE message carries the RF capability FDD field (note that the normal TD terminal (ie, Multi-) The mode capability is set to TDD (not carrying this field), and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to TDD.

For a GSM/WCDMA single-card dual-standby terminal, the UE radio access capability in the RRC CONNECTION SETUP COMPLETE message carries the RF capability TDD field (note that the normal WCDMA terminal (ie, the Multi-mode capability is set to The FDD terminal does not carry this field) and is in the UE multi-mode/multi-RAT capability field in the UE radio access capability field. Multi-mode capability set to FDD

Second, the Inter-RAT UE radio access capability in the RRC CONNECTION SETUP COMPLETE message carries the GSM access capability, and the eighth bit of the third byte of the Mobile Station Classmark 2 in the GSM access capability is filled with the spare (blank bit). 1, the representative is a single card dual standby terminal (the normal terminal is filled with 0).

The entity interacting with the terminal in the second network may be an RNC (Radio Network Controller).

The RNC receives the RRC CONNECTION SETUP COMPLETE message, and determines whether the terminal is a single card dual standby terminal according to the message, and if yes, saves the single card dual standby terminal identifier.

There are two specific methods of judgment:

First, if the UE radio access capability in the message carries the RF capability FDD field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to TDD (GSM/ The TD single-card dual-standby terminal, or the UE radio access capability in the message carries the RF capability TDD field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD (GSM/WCDMA single card dual standby terminal) identifies the terminal as a single card dual standby terminal.

Second, if the Inter-RAT UE radio access capability in the message carries the GSM access capability, the spare of the 8th digit of the third byte of the Mobile Station Classmark 2 is filled with 1, and the representative is a single card dual standby.

The RNC sends a single-card dual-standby terminal reselection parameter to the corresponding single-card dual-standby terminal through the MEASUREMENT CONTROL message according to the single-card dual-standby terminal identifier.

Specifically, the RNC may use the 2D event or the 3A event to issue a single card dual standby terminal reselection parameter. If a 2D event is issued, the RNC uses "Threshold used frequency" to carry "Threshold 1" and "Time to trigger" to carry "Threshold 2". If a 3A event is issued, RNC uses "Threshold own system" to carry "Threshold 1" and "Time to trigger" to carry "Threshold 2". The threshold 1 and the threshold 2 are parameters for reselecting the PS service state of the single-card dual-standby terminal of the serving cell from the second network to the first network.

104: The single-card dual-standby terminal saves the single-card dual-standby terminal reselection parameter delivered by the network, and according to the single-card dual-standby terminal reselection parameter, when the PS domain service is in progress, when the communication quality of the second network does not satisfy the PS When the domain service requires, the PS domain service is reselected to the first network.

Specifically, the single-card dual-standby terminal stores threshold 1 and threshold 2. When the signal of the serving cell is lower than the threshold 1, and the duration reaches the threshold 2, it is determined that the communication quality of the second network does not meet the PS domain service requirement, and the re-election is performed. Go to the first network. During the PS domain service process performed by the single-card dual-standby terminal in the second network, inter-cell handover or inter-RNC handover may occur. (1) If the single-card dual-standby terminal performs inter-cell handover in the RNC, the RNC sends a MESCUREMENT CONTROL message to the single-card dual-standby terminal to deliver the single-card dual-standby terminal reselection parameter of the serving cell to the single-card dual-standby terminal. The terminal performs measurement and reselection according to the reselection parameters sent by the network. (2) If the inter-RNC handover occurs between the single-card dual-standby terminal, the source RNC transparently transmits the UE radio access capabiity field to the target-side RNC, or the source RNC transparently transmits the Inter-RAT UE radio access capabiity field to the target-side RNC. When the target side RNC determines that it is a single-card dual-standby terminal, the MEASUREMENT CONTROL message is used to deliver the single-card dual-standby terminal reselection parameter of the serving cell to the single-card dual-standby terminal, and the single-card dual-standby terminal performs the re-selection parameter according to the network. Perform measurements and reselections.

In this embodiment, the CS domain service is preferentially residing on the first network, and the CS domain service is preferentially carried through the first network. The PS domain service is preferentially residing on the second network, and the PS domain service is preferentially carried through the second network. A network has better coverage than the second network signal, so that the CS domain service (such as voice service) can be greatly re-selected between different networks due to poor signal, thereby reducing the inaccessibility of the CS domain service and improving the time. The user experiences the CS domain service. At the same time, because the second network rate is transmitted faster, the PS domain service is preferentially carried through the second network, and the user can enjoy the high-speed PS domain service.

In addition, in the embodiment of the present invention, when the PS domain service is established, the terminal reports the single-card dual-standby terminal identifier to the second network, so that the second network sends the single-card dual-standby terminal reselection parameter according to the single-card dual-standby terminal. The reselection parameter, in the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network, and the single card dual standby terminal is ensured in the PS service state network. Business continuity at the time of re-election. Referring to FIG. 5, another embodiment of the present invention provides a network selection method, where a first network is a 2G network, and a second network is a 3G network, and all terminals that report single mode capability (single mode capability terminals) The single card dual standby terminal reselection parameter is sent instead of the single card dual standby terminal. The method includes the following steps:

200: The single-card dual-standby terminal preferentially resides in the first network in the CS domain, and preferentially carries the CS domain service through the first network, and preferentially resides in the second network in the PS domain service, and preferentially carries the PS domain service through the second network. (Not shown in Figure 5).

The single card dual standby terminal is a terminal based on a SIM (Subscriber Identity Module) card, and the SIM card is used to store information related to the first network and the second network.

The first network has a lower data transmission rate and better signal coverage than the second network. In this embodiment, the first network may be a 2G network, such as a GSM network, and the second network may be a 3G network, such as a TD-SCDMA network (referred to as TD network) or a WCDMA (Wideband Code Division Multiple Access) network. Wait.

201: When establishing the PS domain service, the terminal sends an RRC CONNECTION SETUP COMPLETE message to the second network, carrying the single mode capability terminal identifier, as follows: For the GSM/TD single-card dual-standby terminal, the Support of GSM in the UE multi-mode/mult i-RAT capability in the UE radio access capability field in the RRC CONNECTION SETUP COMPLETE message is set to FALSE (GSM is not supported), and the UE The Multi-mode capability in the UE multi-mode/multi-RAT capability field in the radio access capability field is set to TDD to indicate that the terminal is a single mode capability terminal.

For a GSM/WCDMA single-card dual-standby terminal, the Support of GSM in the UE multi-mode/multi-RAT capability in the UE radio access capability field in the RRC CONNECTION SETUP COMPLETE message is set to FALSE (not supported for GSM) and UE radio access The Multi-mode capability in the UE multi-mode/multi-RAT capability field in the capability field is set to FDD to indicate that the terminal is a single mode capable terminal.

The single mode capability terminal includes a common single mode terminal (single card single standby terminal) and a single card dual standby terminal. The entity interacting with the terminal in the second network may be an RNC (Radio Network Controller).

202: The RNC receives the RRC CONNECTION SETUP COMPLETE message, and determines, according to the message, whether the terminal is a 3G single mode capability terminal, and if yes, saves the single mode capability terminal identifier.

Specifically, if the Support of GSM in the UE multi-mode/multi-RAT capability in the UE radio access capability field in the message is set to FALSE (GSM is not supported), and the UE multi-mode/ in the UE radio access capability field The Multi-mode capability in the multi-RAT capability field is set to TDD, or the Support of GSM in the UE multi-mode/multi-RAT capability in the UE radio access capability field in the RRC CONNECTION SETUP COMPLETE message is set to FALSE (not supported) GSM), and the Multi-mode capability is set to FDD, and the terminal is identified as a 3G single mode capability terminal.

203: The RNC sends a single card dual standby terminal reselection parameter to the corresponding single mode capability terminal by using the MEASUREMENT CONTROL message according to the single mode capability terminal identifier.

204: The single-mode capability terminal receives the single-card dual-standby terminal reselection parameter, but only the single-card dual-standby terminal saves and reselects the parameter according to the single-card dual-standby terminal, and the communication quality of the second network is not in the process of performing the PS domain service. When the PS domain service requirements are met, the PS domain service is reselected to the first network. Specifically, the single-card dual-standby terminal stores threshold 1 and threshold 2. When the signal of the serving cell is lower than the threshold 1, and the duration reaches the threshold 2, it is determined that the communication quality of the second network does not meet the PS domain service requirement, and the re-election is performed. Go to the first network.

In the PS domain service process performed by the second network, the single-card dual-standby terminal may undergo inter-cell handover or inter-RNC handover. (1) If the single-card dual-standby terminal performs inter-cell handover in the RNC, the RNC sends a single-card dual-standby terminal reselection parameter of the serving cell to the single-mode capability terminal through the MEASUREMENT CONTROL message in the new cell, where the single card The dual standby terminal performs measurement and reselection according to the reselection parameters sent by the network. (2) If the inter-RNC handover occurs on the single-card dual-standby terminal, the source RNC transparently transmits the UE radio access capabiity field to the target-side RNC, and the target-side RNC determines the single-mode capability terminal, and passes the MEASUREMENT CONTROL message to the single-mode capability. The terminal delivers the single-card dual-standby terminal reselection parameter of the serving cell, where the single-card dual-standby terminal performs measurement and re-selection according to the reselection parameters sent by the network.

In addition, in the embodiment of the present invention, when the PS domain service is established, the terminal reports the single mode capability to the second network, and the second network sends the single card dual standby terminal reselection parameter to the single mode capability terminal, where the single card dual standby terminal is based on The single-card dual-standby terminal reselection parameter, in the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network, and the single-card dual-standby terminal is guaranteed. Business continuity in PS business state network reselection. Compared with the first embodiment, the method is simple to implement, but the network sends a single card dual standby reselection parameter to other single mode terminals except the single card dual standby terminal, which increases signaling overhead. Referring to FIG. 6, another embodiment of the present invention provides a network selection method, where the first network is a 2G network or a 3G network, and the second network is an LTE (Long Term Evolution) network, for a single card. The dual standby terminal sends a single card dual standby terminal reselection parameter, and the method includes the following steps:

300: The single-card dual-standby terminal preferentially resides in the first network in the CS domain, and preferentially carries the CS domain service through the first network, and preferentially resides in the second network in the PS domain service, and preferentially carries the PS domain service through the second network. , (not shown in Figure 6).

The first network has a lower data transmission rate and better signal coverage than the second network. In this embodiment, the first network may be a 2G network or a 3G network, a 2G network such as a GSM network, a 3G network such as a TD-SCDMA network, or a WCDMA network. Etc., the second network may be an LTE network.

301: When the PS-domain service is established, when the single-card dual-standby terminal sends the UECapabilitylnformation message to the second network, the single-card dual-standby terminal identifier is carried as follows:

The ueCapability RAT-Container in the UECapab i 1 ity I nf or mat i on message carries the INTER RAT HANDOVER INFO field, where the UE radio access capability is set, and when it is a TDD LTE terminal, the RF capability is carried in the UE radio access capability. FDD field (It should be noted that the normal TDD LTE terminal (ie, the terminal with the multi-mode capability set to TDD) does not carry this field), and the UE multi-mode/multi-RAT capability field in the UE radio access capability field The Multi-mode capability is set to TDD to indicate that the terminal is a single card dual standby terminal.

Or, the RF capability TDD field is carried in the UE radio access capability. It should be noted that the normal FDD LTE terminal (that is, the terminal with the multi-mode capability set to FDD does not carry the field), and the UE in the UE radio access capability field The Multi-mode capability in the multi-mode/multi-RAT capability field is set to FDD to indicate that the terminal is a single-card dual-standby terminal.

The entity interacting with the terminal in the second network may be an eNodeB (Evolved Node B). 302: The eNodeB receives the UECapabilitylnformation message, and determines, according to the message, whether the terminal is a single-card dual-standby terminal, and if yes, saves the single-card dual-standby terminal identifier.

Specifically, if the RF capability FDD field is carried in the UE radio access capability in the INTER RAT HANDOVER INFO field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to TDD, Then, the terminal is identified as a TDD LTE single card dual standby terminal.

Or, if the RF capability TDD field is carried in the UE radio access capability in the INTER RAT HANDOVER INFO field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD, The terminal is identified as an FDD LTE single card dual standby terminal.

303: The eNodeB sends a single card dual standby terminal reselection parameter to the corresponding single card dual standby terminal according to the RRCConnectionReconf iguration message according to the single card dual standby terminal identifier.

Specifically, the eNodeB can use the A5 event or the B2 event to send a single card dual standby terminal reselection parameter. If you use the A5 event to send, use "a5-Thresholdl" to carry "Threshold 1", "a5_Threshold2" is not set, use "Time to trigger" to carry "Threshold 2". If you use the B2 event to send, use "b2-Thresh ₀ ldl" to carry "Threshold 1", "b2-Threshold2" is not set, and use "Time to trigger" to carry "Threshold 2". "Threshold 1" and "Threshold 2" are the single-card dual-standby terminal PS service state of the serving cell configured by the network from the second network to the first network. Parameters.

304: The single-card dual-standby terminal saves and reselects the parameters according to the single-card dual-standby terminal. When the communication quality of the second network does not meet the PS-domain service requirement, the PS domain service is re-selected to the first network.

Specifically, the single-card dual-standby terminal stores threshold 1 and threshold 2. When the signal of the serving cell is lower than the threshold 1, and the duration reaches the threshold 2, it is determined that the communication quality of the second network does not meet the PS domain service requirement, and the re-election is performed. Go to the first network.

In the PS domain service process performed by the second network, the single-card dual-standby terminal may undergo inter-cell handover or inter-RNC handover. (1) If the single-card dual-standby terminal has inter-cell handover in the eNodeB, the eNodeB sends an RRCConnectionReconfiguration message to the single-card dual-standby terminal in the new cell, and the single-card dual-standby terminal reselection parameter of the serving cell is delivered, and the single-card dual-standby is performed. The terminal performs measurement and reselection according to the reselection parameters sent by the network. (2) If the eNodeB is switched between the single-card dual-standby terminal, the source eNodeB transparently transmits the INTER RAT HANDOVER INFO to the target-side eNodeB. When the target-side eNodeB determines that it is a single-card dual-standby terminal, the RRCConnectionReconfiguration message is sent to the single-card dual-standby terminal. The single-card dual-standby terminal reselection parameter is sent to the serving cell, and the single-card dual-standby terminal performs measurement and re-selection according to the reselection parameters sent by the network.

In addition, in the embodiment of the present invention, when the PS domain service is established, the terminal reports the single-card dual-standby terminal identifier to the second network, so that the second network sends the single-card dual-standby terminal reselection parameter according to the single-card dual-standby terminal. The reselection parameter, in the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network, and the single card dual standby terminal is ensured in the PS service state network. Business continuity at the time of re-election. Referring to FIG. 7, another embodiment of the present invention provides a network selection method, where the first network is a 2G network or a 3G network, and the second network is an LTE network, and a single-card dual-standby is sent to a single-mode capability terminal. The terminal reselects parameters, and the method includes the following steps:

400: The single-card dual-standby terminal preferentially resides in the first network in the CS domain, and preferentially carries the CS domain service through the first network, and preferentially resides in the second network in the PS domain service, and preferentially carries the PS domain service through the second network. , (not shown in Figure 7).

The first network has a lower data transmission rate and better signal coverage than the second network. First in this embodiment The network may be a 2G network or a 3G network, a 2G network such as a GSM network, a 3G network such as a TD-SCDMA network, a WCDMA network, etc., and the second network may be an LTE network.

401: When the PS domain service is established, the terminal sends a UECapabilitylnformation message to the second network, and carries the single-mode capability terminal identifier. The method is as follows:

The UE of the UE radio access capability in the INTER RAT HANDOVER INFO field in the UECapab i 1 ity I nf or mat i on message is supported by the UE of the multi-mode/mult i-RAT capability set to FALSE (not supporting GSM), and the UE The Multi-mode capability in the UE multi-mode/mult i- RAT capability field in the radio access capability field is set to FDD or TDD.

The single mode capability terminal includes a common single mode terminal (single card single standby terminal) and a single card dual standby terminal. The entity interacting with the terminal in the second network may be an eNodeB (Evolved Node B).

402: The eNodeB receives the UECapabilitylnformation message, and determines, according to the message, whether the terminal is an LTE single mode capability terminal, and if yes, saves the single mode capability terminal identifier.

Specifically, the Support of GSM in the UE multi-mode/multi-RAT capability in the UE radio access capability in the INTER RAT HANDOVER INFO field in the UECapabilitylnformation message is set to FALSE (not supported by GSM), and is in the UE radio access capability field. If the Multi-mode capability in the UE multi-mode/multi-RAT capability field is set to FDD or TDD, the terminal is identified as an LTE single mode capability terminal.

403: The eNodeB sends a single-card dual-standby terminal reselection parameter to the corresponding single-mode capability terminal by using the RRCConnectionReconf iguration message according to the single-mode capability terminal identifier.

Specifically, the eNodeB can use the A5 event or the B2 event to send a single card dual standby terminal reselection parameter. If you use the A5 event to send, use "a5-Thresholdl" to carry "Threshold 1", "a5_Threshold2" is not set, use "Time to trigger" to carry "Threshold 2". If you use the B2 event to send, use "b2-Thresh ₀ ldl" to carry "Threshold 1", "b2-Threshold2" is not set, and use "Time to trigger" to carry "Threshold 2". "Threshold 1" and "Threshold 2" are parameters of the single-card dual-standby terminal PS service state of the serving cell of the network configuration reselected from the second network to the first network.

404: The single-mode capability terminal receives the single-card dual-standby terminal reselection parameter, but only the single-card dual-standby terminal saves and reselects the parameter according to the single-card dual-standby terminal. During the PS domain service, when the communication quality of the second network is not When the PS domain service requirements are met, the PS domain service is reselected to the first network.

In the PS domain service process performed by the second network, the single-card dual-standby terminal may undergo inter-cell handover or RNC inter-cutting Change. (1) If the inter-cell handover occurs in the single-card dual-standby terminal, the eNodeB sends an RRCConnectionReconfiguration message to the single-mode capability terminal in the new cell, and delivers the single-card dual-standby terminal reselection parameter of the serving cell, wherein the single-card dual-standby terminal Perform measurement and reselection according to the reselection parameters issued by the network. (2) If the eNodeB is switched between the single-card dual-standby terminal, the source eNodeB transparently transmits the INTER RAT HANDOVER INFO to the target-side eNodeB, and the target-side eNodeB determines to be the single-card dual-standby terminal, and delivers the message to the single-mode capability terminal through the RRCConnectionReconfiguration message. The single-card dual-standby terminal reselection parameter of the serving cell, wherein the single-card dual-standby terminal performs measurement and re-selection according to the reselection parameters sent by the network.

In addition, in the embodiment of the present invention, when the PS domain service is established, the terminal reports the single mode capability to the second network, and the second network sends the single card dual standby terminal reselection parameter to the single mode capability terminal, where the single card dual standby terminal is based on The single-card dual-standby terminal reselection parameter, in the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network, and the single-card dual-standby terminal is guaranteed. Business continuity in PS business state network reselection. Compared with the first embodiment, the method is simple to implement, but the network sends a single card dual standby reselection parameter to other single mode terminals except the single card dual standby terminal, which increases signaling overhead. Referring to FIG. 8, another embodiment of the present invention provides a single card dual standby terminal, where the single card dual standby terminal is a SIM card based terminal, including:

The first network processing module 501 is configured to preferentially camp on the circuit-switched CS domain service in the first network, and preferentially carry the CS domain service through the first network;

The second network processing module 502 is configured to preferentially relocate the packet switched PS domain service to the second network, and preferentially carry the PS domain service by using the second network; wherein, the first network has a lower data transmission rate than the second network. The second network processing module 502 is further configured to report the single card dual standby terminal identifier to the second network when the PS domain service is established, so that the second network receives the single card dual standby terminal identifier, according to the single card. The dual-standby terminal identifier is sent to the single-card dual-standby terminal reselection parameter;

The second network processing module 502 is further configured to: according to the single-card dual-standby terminal re-selection parameter delivered by the second network, when the communication quality of the second network does not meet the PS domain service requirement, PS domain business re-election to the first A network.

The single-card dual-standby terminal may also include a SIM card, a SIM card proxy module, an application, a service adaptation module, and the like, and has the same functions as the prior art, and details are not described herein again.

When the second network is a time division synchronous code division multiple access TD-SCDMA network, the second network processing module 502 sends an RRC CONNECTION SETUP COMPLETE message to the second network, where the UE radio access capability field of the RRC CONNECTION SETUP COMPLETE message carries the RF a capability FDD field, and setting a Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field to TDD to indicate that the terminal is a single-card dual-standby terminal;

Or sending an RRC CONNECTION SETUP COMPLETE message to the second network, where the Inter-RAT UE radio access capability field of the RRC CONNECTION SETUP COMPLETE message carries the GSM access capability, and the third byte of the Mobile Station Classmark 2 in the GSM access capability The 8th spare is filled with 1 to indicate that the terminal is a single card dual standby terminal.

When the second network is a wideband code division multiple access WCDMA network, the second network processing module 502 is specifically configured to: send an RRC CONNECTION SETUP COMPLETE message to the second network, where the UE radio access capability field in the RRC CONNECTION SETUP COMPLETE message The RF capability TDD field is carried, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD to indicate that the terminal is a single card dual standby terminal.

When the second network is a long term evolution LTE network, the second network processing module 502 is specifically configured to:

Sending a UECapab i 1 ity I nf or mat i on message to the second network, where the ueCapability RAT-Container of the UECapabilitylnformation message carries an INTER RAT HANDOVER INFO field, and the UE radio access capability in the INTER RAT HANDOVER INFO field carries an RF capability FDD field, and the UE The Multi-mode capability in the UE multi-mode/multi-RAT capability field in the radio access capability field is set to TDD to indicate that the terminal is a TDD LTE single-card dual-standby terminal; or the UE radio access capability in the INTER RAT HANDOVER INFO field The RF capability TDD field is carried, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD to indicate that the terminal is an FDD LTE single card dual standby terminal.

a second network processing module 502, specifically for

When the signal of the serving cell in the second network is lower than the threshold 1, and the duration reaches the threshold 2, it is determined that the communication quality of the second network does not meet the PS domain service requirement, and the PS domain service resides in the first network; 1 and the threshold 2 is obtained by the single card dual standby terminal reselection parameter delivered by the second network.

It should be noted that each of the foregoing modules is only a functional module that is divided on a logical function. They are implemented by different chips, and can also be integrated into one chip. In this embodiment, the CS domain service is preferentially residing on the first network, and the CS domain service is preferentially carried through the first network. The PS domain service is preferentially residing on the second network, and the PS domain service is preferentially carried through the second network. A network has better coverage than the second network signal, so that the CS domain service (such as voice service) can be greatly re-selected between different networks due to poor signal, thereby reducing the inaccessibility of the CS domain service and improving the time. The user experiences the CS domain service. At the same time, because the second network rate is transmitted faster, the PS domain service is preferentially carried through the second network, and the user can enjoy the high-speed PS domain service.

In addition, in the embodiment of the present invention, when the PS domain service is established, the terminal reports the single mode capability to the second network, and the second network sends the single card dual standby terminal reselection parameter to the single mode capability terminal, where the single card dual standby terminal is based on The single-card dual-standby terminal reselection parameter, in the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network, and the single-card dual-standby terminal is guaranteed. Business continuity in PS business state network reselection. Referring to FIG. 9, another embodiment of the present invention provides a network side device, which may be an RNC or an eNodeB, etc., including:

The receiving module 601 is configured to receive a single card dual standby terminal identifier reported by the single card dual standby terminal when the PS domain service is established, where the single card dual standby terminal is a terminal based on a SIM card of the subscriber identity module, and the single card dual standby terminal The circuit-switched CS domain service preferentially resides in the first network, and preferentially carries the CS domain service through the first network; the single-card dual-standby terminal preferentially camps on the packet-switched PS domain service in the second network, and preferentially carries the PS domain through the second network. Service; wherein, the first network has a lower data transmission rate and better signal coverage than the second network;

The sending module 602 is configured to send a single dual-standby terminal reselection parameter according to the received single-card dual-standby identifier, so that after the terminal receives the re-selection parameter, the communication quality of the second network is not performed. When the PS domain service requirements are met, the PS domain service is reselected to the first network.

When the second network is a time division synchronous code division multiple access TD-SCDMA network, the receiving module 601 includes a first receiving unit or a second receiving unit;

a first receiving unit, configured to receive an RRC CONNECTION SETUP COMPLETE message sent by the single-card dual-standby terminal, if the UE radio access cap Unicode of the RRC CONNECTION SETUP COMPLETE message carries an RF capabiity FDD field, and the UE radio access capabiity field The Multi-mode capabi ity in the UE multi-mode/multi-RAT capabi ity field is set to TDD, and is identified as a single card dual standby terminal;

a second receiving unit, configured to receive an RRC CONNECTION SETUP COMPLETE message sent by the single card dual standby terminal, if the Inter-RAT UE radio access capabi ity word of the RRC CONNECTION SETUP COMPLETE message The segment carries the GSM access capability, and the spare of the eighth byte of the third byte of the Mobile Station Classmark 2 in the GSM access capability is filled as 1, and is identified as a single card dual standby terminal.

When the second network is a long term evolution LTE network, the receiving module 601 includes a third receiving unit;

a third receiving unit, configured to receive a UECapabilitylnformation message sent by the single-card dual-standby terminal, where the ueCapability RAT-Container carries an INTER RAT HANDOVER INFO field, and the UE radio access capability in the INTER RAT HANDOVER INFO field carries an RF capability FDD field, and the UE The Multi-mode capability in the UE multi-mode/multi-RAT capability field in the radio access capability field is set to TDD, and is identified as a TDD LTE single-card dual-standby terminal; or the UE radio access capability in the INTER RAT HANDOVER INFO field is carried. The RF capability TDD field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD, and is identified as an FDD LTE single card dual standby terminal.

When the second network is a wideband code division multiple access WCDMA network, the receiving module 601 includes a fourth receiving unit, and the fourth receiving unit is configured to receive an RRC CONNECTION SETUP COMPLETE message sent by the single card dual standby terminal, if the RRC CONNECTION SETUP COMPLETE message The UE radio access capability field carries the RF capability TDD field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD, and is identified as a single card dual standby terminal.

The sending module 602 includes: a first sending unit or a second sending unit;

The first sending unit is configured to use the 2D event or the 3A event by using the MEASUREMENT CONTROL message to send a single card dual standby terminal reselection according to the received single card dual standby terminal identifier when the PS service is accessed or after the cell handover occurs. The second sending unit is configured to pass the PS service access or after the cell handover occurs.

The RRCConnectionReconfiguration message uses the A5 event or the B2 event to send a single card dual standby terminal reselection parameter according to the received single card dual standby terminal identifier.

In this embodiment, the single-card dual-standby terminal identifier is reported by the single-card dual-standby terminal, and the single-card dual-standby terminal re-selection parameter is sent according to the reported single-card dual-standby terminal identifier, so that the single-card dual-standby terminal is dual-standby according to the single card. The terminal reselects the parameters. When the communication quality of the second network does not meet the PS domain service requirements, the PS domain service is reselected to the first network, ensuring the single card dual standby terminal in the PS service state network. Business continuity at the time of re-election.

In addition, the CS domain service is preferentially relocated on the first network by the terminal, and the CS domain service is preferentially carried by the first network; the PS domain service is preferentially residing on the second network, and the PS domain service is preferentially carried through the second network, because A network has better coverage than the second network signal, so that the CS domain service (such as voice service) can be greatly re-selected between different networks due to poor signal, thereby reducing the inaccessibility of the CS domain service and improving the time. The experience of the user on the CS domain service; at the same time, because the second network rate is transmitted faster, the PS domain service is preferentially carried through the second network and can be enjoyed by the user. High-speed PS domain service Another embodiment of the present invention provides a network selection system, including: a single-card dual-standby terminal 701 and a network-side device 702;

The single-card dual-standby terminal 701 is configured to preferentially camp on the CS-domain service in the first network, and preferentially carry the CS-domain service through the first network, and preferentially reside in the second network in the packet-switched PS domain service, and preferentially pass the first The second network carries the PS domain service, where the first network has a lower data transmission rate and a better signal coverage than the second network, and reports the single card dual standby terminal identifier to the network side device when the PS domain service is established;

The network side device 702 is configured to: after receiving the single card dual standby terminal identifier, send a single card dual standby terminal reselection parameter according to the single card dual standby terminal identifier;

The single-card dual-standby terminal 701 is further configured to re-select the PS domain service to the PS domain service when the communication quality of the second network does not meet the PS domain service requirement during the PS domain service process. First network.

The single-card dual-standby terminal 701 refers to the embodiment shown in FIG. 8, and the network-side device 702 refers to the embodiment shown in FIG.

In this embodiment, the CS domain service is preferentially residing on the first network, and the CS domain service is preferentially carried through the first network. The PS domain service is preferentially residing on the second network, and the PS domain service is preferentially carried through the second network. A network has better coverage than the second network signal, so that the CS domain service (such as voice service) can be greatly re-selected between different networks due to poor signal, thereby reducing the inaccessibility of the CS domain service and improving the time. User experience with CS domain services

(If the call is more stable, it is not easy to drop the line, etc.); At the same time, because the second network rate is transmitted faster, the PS domain service is preferentially carried through the second network, and the user can enjoy the high-speed PS domain service.

In addition, in the embodiment of the present invention, when the PS domain service is established, the terminal reports the single-card dual-standby terminal identifier to the second network, so that the second network sends the single-card dual-standby terminal reselection parameter according to the single-card dual-standby terminal. The reselection parameter, in the process of the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network, and the single card dual standby terminal is ensured in the PS service state network. Business continuity at the time of re-election. All or part of the technical solutions provided by the above embodiments may be implemented by software programming, and the software program is stored in a readable storage medium such as a hard disk, an optical disk or a floppy disk in a computer.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Claim

A network selection method, which is characterized in that it is applied to a terminal based on a SIM card of a subscriber identity module, the method comprising:

The circuit-switched CS domain service is preferentially camped on the first network, and the CS domain service is preferentially carried by the first network; the packet-switched PS domain service is preferentially camped on the second network, and the second network bearer is preferentially carried. The PS domain service; wherein, the first network has a lower data transmission rate and better signal coverage than the second network;

When the PS domain service is established, the single-card dual-standby terminal identifier is reported to the second network, so that the second network receives the single-card dual-standby terminal identifier, and then delivers the label according to the single-card dual-standby terminal identifier. Single card dual standby terminal reselection parameters;

And the PS domain is configured according to the single-card dual-standby terminal reselection parameter sent by the second network, when the communication quality of the second network does not meet the PS domain service requirement during the PS domain service The service is reselected to the first network.

The method according to claim 1, wherein when the second network is a time division synchronous code division multiple access TD-SCDMA network, the reporting the single card dual standby terminal identifier to the second network, Includes:

Sending an RRC CONNECTION SETUP COMPLETE message to the second network, where the UE radio access capabiity field of the RRC CONNECTION SETUP COMPLETE message carries an RF capabiity FDD field, and the UE multi-in the UE radio access capabiity field The Multi-mode capabi ity in the mode/multi-RAT capabi ity field is set to TDD to indicate that the terminal is a single card dual standby terminal.

Sending an RRC CONNECTION SETUP COMPLETE message to the second network, where RRC CONNECTION SETUP

The Inter-RAT UE radio access capabi ity field of the COMPLETE message carries the GSM access capability, and the spare of the third byte of the third byte of the Mobi le Station Classmark 2 in the GSM access capability is filled in to indicate that the terminal is Single card dual standby terminal.

The method according to claim 1, wherein when the second network is a wideband code division multiple access (WCDMA) network, the reporting the single card dual standby terminal identifier to the second network includes:

Sending an RRC CONNECTION SETUP COMPLETE message to the second network, where the UE radio access capabiity field in the RRC CONNECTION SETUP COMPLETE message carries an RF capabiity TDD field, and the UE multi-in the UE radio access capabiity field The Multi-mode capabi ity in the mode/multi-RAT capabi ity field is set to FDD to indicate that the terminal is a single card dual standby terminal.

The method according to claim 1, wherein when the second network is a long term evolution LTE network, The reporting the single card dual standby terminal identifier to the second network includes:

Sending a UECapab i 1 ity I nf or mat i on message to the second network, where the ueCapability RAT-Container of the UECapabilitylnformation message carries an INTER RAT HANDOVER INFO field, and the UE radio access capability in the INTER RAT HANDOVER INFO field carries an RF capability FDD field, And the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to TDD, to indicate that the terminal is a TDD LTE single card dual standby terminal; or in the INTER RAT HANDOVER INFO field The UE radio access capability carries an RF capability TDD field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD, to indicate that the terminal is an FDD LTE single card dual standby. terminal.

The method according to claim 1, wherein the single-card dual-standby terminal reselection parameter delivered by the second network is performed during a PS domain service, when the second network is When the communication quality does not meet the requirements of the PS domain service, the PS domain service is camped on the first network, including:

When the signal of the serving cell in the second network is lower than the threshold 1 and the duration reaches the threshold 2, it is determined that the communication quality of the second network does not meet the PS domain service requirement, The PS domain service resides in the first network; the threshold 1 and the threshold 2 are obtained by using a single card dual standby terminal reselection parameter delivered by the second network.

The method according to claim 1, wherein the reporting the single card dual standby terminal identifier to the second network, after the second network receives the single card dual standby terminal identifier, according to The single card dual standby terminal identifier sends a single card dual standby terminal reselection parameter, including:

And reporting the single-card dual-standby terminal identifier to the second network, so that the second network receives the single-card dual-standby terminal identifier, and sends the re-selection parameter by using a 2D event or a 3A event by using a MEASUREMENT CONTROL message;

Or, the single-card dual-standby terminal identifier is reported to the second network, so that the second network receives the single-card dual-standby terminal identifier, and sends the re-selection parameter by using an A5 event or a B2 event through an RRCConnectionReconfiguration message. .

8. A network selection method, characterized in that:

When the packet-switched PS domain service is established, the single-card dual-standby terminal identifier reported by the single-card dual-standby terminal is received, and the single-card dual-standby terminal is a terminal based on a SIM card of a subscriber identity module, and the single-card dual-standby terminal The circuit-switched CS domain service preferentially resides in the first network, and the CS-domain service is preferentially carried by the first network; the single-card dual-standby terminal preferentially camps on the packet-switched PS domain service in the second network, and preferentially passes The second network carries the PS domain service; wherein, the first network has a lower data transmission rate and better signal coverage than the second network; And performing the reselection parameter of the dual-standby terminal according to the received single-card dual-standby identifier, so that after the terminal receives the re-selection parameter, the communication quality of the second network is not satisfied. When the PS domain service requires, the PS domain service is reselected to the first network.

The method according to claim 8, wherein when the second network is a time division synchronous code division multiple access TD-SCDMA network, the single card dual standby terminal identifier reported by the single card dual standby terminal is received. , including:

Receiving an RRC CONNECTION SETUP COMPLETE message sent by the single-card dual-standby terminal, if the UE radio access capability of the RRC CONNECTION SETUP COMPLETE message carries the RF capability FDD field, and the UE multi-mode/multi-RAT capability field in the UE radio access capability field The Multi-mode capability in the setting is TDD, which is recognized as a single card dual standby terminal.

10. The method according to claim 8, wherein when the second network is time division synchronous code division multiple access

In the TD-SCDMA network, the single-card dual-standby terminal identifier reported by the single-card dual-standby terminal, including:

Receiving the RRC CONNECTION SETUP COMPLETE message sent by the single-card dual-standby terminal, if the Inter-RAT UE radio access capability field of the RRC CONNECTION SETUP COMPLETE message carries the GSM access capability, the third word of the Mobile Station Classmark 2 in the GSM access capability The eighth-level spare is filled with 1, and it is recognized as a single-card dual-standby terminal.

The method according to claim 8, wherein when the second network is a wideband code division multiple access (WCDMA) network, the receiving the single card dual standby terminal identifier reported by the single card dual standby terminal includes:

Receiving an RRC CONNECTION SETUP COMPLETE message sent by the single-card dual-standby terminal, if the UE radio access capability field of the RRC CONNECTION SETUP COMPLETE message carries the RF capability TDD field, and the UE multi-mode/multi-RAT capability in the UE radio access capability field If the Multi-mode capability in the field is set to FDD, it is recognized as a single-card dual-standby terminal.

The method according to claim 8, wherein, when the second network is a long-term evolution LTE network, the receiving the single-card dual-standby terminal identifier reported by the single-card dual-standby terminal includes:

Receiving a UECapabilitylnformation message sent by the single-card dual-standby terminal, where the ueCapabilityRAT-Container of the UECapab i1 ity I nf or mat i on message carries the INTER RAT HANDOVER INFO field, and the UE radio access capability in the INTER RAT HANDOVER INFO field carries the RF capability FDD a field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to TDD, and is identified as a TDD LTE single card dual standby terminal; or UE in the INTER RAT HANDOVER INFO field The radio access capability carries an RF capability TDD field, and the UE multi-mode/multi-RAT capability in the UE radio access capability field The Multi-mode capabi ity in the field is set to FDD, which is identified as the FDD LTE single card dual standby terminal.

The method according to claim 8, wherein the step of resizing a single standby dual-standby terminal according to the received single-card dual-standby identifier includes:

When the PS service is accessed or after the cell handover occurs, the 2D event or the 3A event is used by the MEASUREMENT CONTROL message, and the single card dual standby terminal reselection parameter is sent according to the received single card dual standby terminal identifier; or

After the PS service is accessed or after the cell handover occurs, the A5 event or the B2 event is used by the RRCConnectionReconfiguration message, and the single card dual standby terminal reselection parameter is sent according to the received single card dual standby terminal identifier.

A single-card dual-standby terminal, wherein the single-card dual-standby terminal is a terminal based on a subscriber identity module SIM card, wherein the single-card dual-standby terminal includes:

a first network processing module, configured to preferentially relocate the circuit switched CS domain service to the first network, and preferentially carry the CS domain service by using the first network;

The second network processing module is further configured to: according to the single-card dual-standby terminal re-selection parameter sent by the second network, when the PS-domain service is in progress, when the communication quality of the second network does not meet the When the PS domain service requires, the PS domain service is reselected to the first network.

The single-card dual-standby terminal according to claim 14, wherein when the second network is a time division synchronous code division multiple access TD-SCDMA network, the second network processing module is specifically configured to:

Sending an RRC CONNECTION SETUP COMPLETE message to the second network, where the UE radio access capabiity field of the RRC CONNECTION SETUP COMPLETE message carries an RF capabiity FDD field, and the UE multi-in the UE radio access capabiity field The Multi-mode capabi ity in the mode/multi-RAT capabi ity field is set to TDD to indicate that the terminal is a single card dual standby terminal;

Or sending an RRC CONNECTION SETUP COMPLETE message to the second network, where the Inter-RAT UE radio access capabiity field of the RRC CONNECTION SETUP COMPLETE message carries the GSM access capability, and the Mobi le Station Classmark 2 in the GSM access capability The third digit of the third byte of the spa is filled with 1 to indicate The terminal is a single card dual standby terminal.

The single-card dual-standby terminal according to claim 14, wherein when the second network is a wideband code division multiple access WCDMA network, the second network processing module is specifically configured to:

Sending an RRC CONNECTION SETUP COMPLETE message to the second network, where the UE radio access capability field in the RRC CONNECTION SETUP COMPLETE message carries an RF capability TDD field, and the UE multi-mode/multi-RAT capability in the UE radio access capability field The Multi-mode capability in the field is set to FDD to indicate that the terminal is a single card dual standby terminal.

The single-card dual-standby terminal according to claim 14, wherein when the second network is a long-term evolution LTE network, the second network processing module is specifically configured to:

Sending a UECapabilitylnformation message to the second network, where the ueCapability RAT-Container of the UECapabilitylnformation message carries an INTER RAT HANDOVER INFO field, and the UE radio access capability in the INTER RAT HANDOVER INFO field carries an RF capability FDD field, and the UE radio access capability field The Multi-mode capability in the UE multi-mode/multi-RAT capability field is set to TDD to indicate that the terminal is a TDD LTE single-card dual-standby terminal; or the UE radio access capability in the INTER RAT HANDOVER INFO field carries an RF capability TDD a field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD to indicate that the terminal is an FDD LTE single card dual standby terminal.

The single-card dual-standby terminal according to claim 14, wherein the second network processing module is specifically configured to:

A network side device, where the network side device includes:

a receiving module, configured to receive a single-card dual-standby terminal identifier reported by a single-card dual-standby terminal, where the single-card dual-standby terminal is a terminal based on a SIM card of a subscriber identity module, where the single-card dual Waiting for the terminal to preferentially camp on the CS domain service in the first network, and preferentially carrying the CS domain service through the first network; the single card dual standby terminal preferentially camping on the packet switched PS domain service in the second network Preferably, the PS domain service is carried by the second network; wherein, the first network has a lower data transmission rate and better signal coverage than the second network;

a sending module, configured to send, according to the received single card dual standby identifier, a single and dual standby terminal reselection parameter, so that the terminal receives After the reselection parameter is performed in the PS domain service, when the communication quality of the second network does not meet the PS domain service requirement, the PS domain service is reselected to the first network.

The network side device according to claim 19, wherein when the second network is a time division synchronous code division multiple access TD-SCDMA network, the receiving module comprises a first receiving unit or a second receiving unit ;

The first receiving unit is configured to receive an RRC CONNECTION SETUP COMPLETE message sent by the single-card dual-standby terminal, if the UE radio access capability of the RRC CONNECTION SETUP COMPLETE message carries the RF capability FDD field, and the UE in the UE radio access capability field The multi-mode capability in the multi-mode/multi-RAT capability field is set to TDD, and is identified as a single-card dual-standby terminal;

The second receiving unit is configured to receive an RRC CONNECTION SETUP COMPLETE message sent by the single-card dual-standby terminal, if the Inter-RAT UE radio access capability field of the RRC CONNECTION SETUP COMPLETE message carries the GSM access capability, in the GSM access capability The spare part of the third byte of the Mobile Station Classmark 2 is filled with 1, and it is recognized as a single card dual standby terminal.

The network side device according to claim 19, wherein when the second network is a long term evolution LTE network, and the first network is a global mobile communication system GSM network, the receiving module includes a third The receiving unit is configured to receive a UECapabilitylnformation message sent by the single-card dual-standby terminal, where the ueCapabilityRAT-Container of the UECapabilitylnformation message carries the INTER RAT HANDOVER INFO field, and the UE radio access capability in the INTER RAT HANDOVER INFO field The RF capability FDD field is carried, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to TDD, and is identified as a TDD LTE single card dual standby terminal; or INTER RAT HANDOVER INFO The UE radio access capability in the field carries the RF capability TDD field, and the Multi-mode capability in the UE multi-mode/multi-RAT capability field in the UE radio access capability field is set to FDD, and is identified as FDD LTE single card dual standby. terminal.

The network side device according to claim 19, wherein, when the second network is a wideband code division multiple access (WCDMA) network, the receiving module comprises a fourth receiving unit;

The fourth receiving unit is configured to receive an RRC CONNECTION SETUP COMPLETE message sent by the single-card dual-standby terminal, if the UE radio access capability field of the RRC CONNECTION SETUP COMPLETE message carries the RF capability TDD field, and the UE radio access capability field The Multi-mode capability in the UE multi-mode/multi-RAT capability field is set to FDD, which is identified as a single-card dual-standby terminal.

The network side device according to claim 16, wherein the sending module comprises: a first sending unit or a second sending unit;

The first sending unit is configured to use a 2D event or a 3A event by using a MEASUREMENT CONTROL message to send a single card dual standby terminal according to the received single card dual standby terminal identifier when the PS service is accessed or after the cell handover occurs. The second sending unit is configured to use the A5 event or the B2 event by using the RRCConnectionReconfiguration message when the PS service is accessed or after the cell handover occurs, and issue the single card according to the received single card dual standby terminal identifier. Dual standby terminal reselection parameters.