WO2017012532A1 - Dual-sim-dual-standby terminal and data communication method - Google Patents

Abstract

A Dual-SIM-Dual-Standby (DSDS) terminal and data communication method. The Dual-SIM-Dual-Standby (DSDS) terminal comprises a first SIM card, a second SIM card, a first protocol stack, a second protocol stack, a data service module, and a TCP/IP protocol stack; the TCP/IP protocol stack comprises a first virtual WAN transmission interface and a second virtual WAN transmission interface; the first SIM card resides in the PS domain and the CS domain of the network by means of the first protocol stack; the second SIM card resides in the PS domain and the CS domain of the network by means of the second protocol stack; the first virtual WAN transmission interface and the second virtual WAN transmission interface are respectively used for transmitting data from the first protocol stack and the second protocol stack; and the data service module is used for selecting the network at which the first SIM card or the second SIM card is located to establish a PS data service link so as to transmit data. The technical solutions provided by the embodiments of the present invention achieve the simultaneous residing of CS voice services and PS data services in the SIM cards, and avoid such problems as an interruption of transmission caused by an abnormality occurring in a certain network, which improves the utilization of resources, thereby improving user experiences.

Description

Dual card dual standby terminal and data communication method Technical field

The embodiments of the present invention relate to, but are not limited to, the field of mobile communications, and in particular, to a dual card dual standby terminal and a data communication method.

Background technique

With the development of mobile networks and data communication technologies, users are increasingly demanding data rates for terminals. On the other hand, while increasing the network rate and frequency band utilization, the emergence of multi-mode terminals (for example, DSDS, dual-card dual-standby terminals) enables users to establish dual-cards respectively while performing dual-card voice service standby. Data business link.

However, in the related art DSDS terminal, when one of the two Subscriber Identity Module (SIM) cards uses the data service, the other SIM card can only stand by as a voice service. Therefore, when the communication network in which the SIM card of the data service is located is interrupted or the communication quality is deteriorated, the data service is transmitted or even interrupted, which greatly limits the use of the data service. Waste of terminal RF resources.

On the other hand, the DSDS terminal provided by the related art can only use one SIM card to use a 3G/4G (for example, LTE) network and its data service, and the other SIM card can only use 2G service (GSM/1X), therefore, When switching, not only the switching of the SIM card data service needs to be completed, but also the switching of the network standard needs to be completed. Such a switching mode requires interaction with the SIM card, for example, an "deactivation"-"activation" interaction process, such that a switch takes a long time to meet real-time data services (eg, VOIP, etc.). demand.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the present invention provides a dual-card dual-standby terminal and a data communication method, which at least solves the problem that the communication mode of the DSDS terminal in the prior art limits the use of the user data service, causing waste of radio frequency resources and the like.

The technical solution adopted by the present invention to solve the technical problem is: constructing a dual card dual standby terminal, comprising: a first subscriber identity module SIM card, a second SIM card, a first protocol stack, a second protocol stack, and a data service module And the Transmission Control Protocol/Internet Protocol TCP/IP protocol stack;

The TCP/IP protocol stack includes a first virtual wide area network WAN transmission interface and a second virtual WAN transmission interface;

The first SIM card resides in the packet domain PS domain and the circuit domain CS domain of the network through the first protocol stack;

The second SIM card resides in the PS domain and the CS domain of the network through the second protocol stack;

The first virtual WAN transmission interface and the second virtual WAN transmission interface are respectively connected to the first protocol stack and the second protocol stack, and configured to transmit data of the first protocol stack and the second protocol stack;

The data service module is configured to select a network where the first SIM card or the second SIM card is located to establish a PS data service link for data transmission.

Optionally, the first protocol stack and the second protocol stack support both the Long Term Evolution (LTE) protocol, and/or the Wideband Code Division Multiple Access (WCDMA) protocol, and/or the Global System for Mobile Communications (GSM) protocol, and/or the time division synchronization code. A multiple access TDS CDMA protocol, and/or a code division multiple access CDMA protocol, and/or an EVDO protocol.

Optionally, the method further includes: an RF transmission module and an RF management module; wherein

a radio frequency transmission module configured to transmit communication exchange signaling to one or more base stations or other devices in the wireless communication system, or to receive communication exchange signaling from one or more base stations or other devices;

A radio frequency management module is configured to manage communication exchange signaling associated with the first SIM card and the second SIM card via a radio frequency transmission module.

Optionally, the data service module includes:

a detecting unit configured to detect whether a data application needs to establish a data service link;

a judging unit, configured to determine whether a SIM card has established a data service link;

Selecting a unit, configured to select an optimal network to establish a data service link for data transmission if no SIM card establishes a data service link;

The determining unit is configured to determine an optimal network according to the data application characteristics of the current request and the network performance of each network if the existing SIM card establishes a data service link, and determine whether the established data service link passes the optimal network. built;

The switching unit is configured to perform switching of the data link from one SIM card to another SIM card if the determination result of the determining unit is not established by the optimal network.

Optionally, the switching unit is specifically configured to: send a first MSG message by using a current SIM card, suspend a PDP data link on the current SIM card, and send a second MSG message by using another SIM card to request Establish/restore the current PDP data link network. After the network replies, activate and establish a PDP data link through another SIM card to complete the data link switch.

Optionally, the data service module further includes:

a data preference unit configured to switch data links according to network performance to perform data transmission using an optimal network;

The timing preference unit is configured to switch the data link according to the timing time to perform data transmission using the optimal network.

Optionally, the data preference unit includes:

Condition preset subunit, set to pre-set reselection conditions and switching conditions;

The reselection judging unit is configured to detect whether the network state of the network where the SIM card currently transmitting data is located satisfies the reselection condition, and if yes, detect the state parameter of the network where the other SIM card is located;

The first handover determining subunit is configured to perform link delay measurement on the current network and start a delay measurement timer if the status parameter satisfies the handover condition; otherwise, continue to use the current network for data transmission;

a first switching subunit configured to switch data transmission from a current SIM card to another SIM card;

The first link delay measurement unit is configured to perform link delay measurement on the new network after successfully switching and establishing a data service link;

The first detecting subunit is configured to end the link delay measurement for the new network, and perform data link switching to re-switch back to the original network to establish a data service chain, if the time delay measurement timer expires. Data transmission;

The second detecting subunit is configured to: if the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, the data transmission is performed through the new network, and vice versa. Then, data link switching is performed to switch back to the original network for data transmission.

Optionally, the timing preference unit includes:

Set the subunit, set to set the preferred timer;

Measuring subunit, configured to measure whether the network status of another network is good when the preferred timer expires;

The second handover determining subunit is configured to start a delay measurement timer and perform link delay measurement on the current network if the network status of the other network is good; otherwise, continue to use the current network for data transmission;

a second switching subunit, configured to switch the data link from the current SIM card to another SIM card;

The second link delay measurement sub-unit is configured to perform link delay measurement on the new network after successfully switching and establishing a data service link;

The third detecting subunit is configured to end the link delay measurement for the new network, and perform the data link switching to re-switch back to the original network to establish a data service link for data transmission if the time delay measurement timer expires.

The fourth detecting subunit is configured to: if the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, the data transmission is performed through the new network, and vice versa. Then, data link switching is performed to switch back to the original network for data transmission.

On the other hand, an embodiment of the present invention provides a data communication method, which is applied to a dual-card dual-standby terminal, where the dual-card dual-standby terminal includes: a first SIM card, a second SIM card, a first protocol stack, and a second a protocol stack, a data service module, and a TCP/IP protocol stack; the TCP/IP protocol stack includes a first virtual WAN transmission interface and a second virtual WAN transmission interface; the first virtual WAN transmission interface and the second virtual WAN transmission interface Connected to the first protocol stack and the second protocol stack respectively;

Also includes:

The first SIM card performs network registration to reside in the PS of the network through the first protocol stack Domain and CS domain;

The second SIM card performs network registration to reside in the PS domain and the CS domain of the network through the second protocol stack;

The data service module detects that a data application needs to establish a data service link, and then selects a network where the first SIM card or the second SIM card is located to establish a PS data service link for data transmission;

The first virtual WAN transmission interface and the second virtual WAN transmission interface respectively transmit data of the first protocol stack and the second protocol stack.

Optionally, the first protocol stack and the second protocol stack support both the Long Term Evolution (LTE) protocol, and/or the Wideband Code Division Multiple Access (WCDMA) protocol, and/or the Global System for Mobile Communications (GSM) protocol, and/or the time division synchronization code. A multiple access TDS CDMA protocol, and/or a code division multiple access CDMA protocol, and/or an EVDO protocol.

Optionally, the method further includes:

a radio frequency transmission module configured to transmit communication exchange signaling to one or more base stations or other devices in a wireless communication system, or to receive communication exchange signaling from one or more base stations or other devices;

Communication exchange signaling associated with the first SIM card and the second SIM card is managed via a radio frequency transmission module.

Optionally, the method further includes:

If the data service module detects that the data application needs to establish a data service link, it determines whether the SIM card has established a data service link, and if not, selects an optimal network to establish a data service link for data transmission;

If so, it is determined whether the established data service link is established through the optimal network, and if not, the data link switch is performed to switch to the optimal network establishment data service link for data transmission.

Optionally, the method further includes: determining the optimal network according to data application characteristics and network performance.

Optionally, the method further includes:

The data transmission is adjusted and switched according to the data preference mode or the timing optimization mode.

Optionally, the data preferred manner includes:

Pre-selection re-selection conditions and switching conditions;

Detecting whether the network status of the network where the SIM card currently transmitting data is located meets the reselection condition, and if so, detecting the status parameter of the network where the other SIM card is located;

If the state parameter meets the handover condition, perform link delay measurement on the current network and start a delay measurement timer, and switch the data link from the current SIM card to another SIM card;

After successfully switching and establishing a data service link, perform link delay measurement on the new network;

If the delay measurement timer is detected, the link delay measurement for the new network is ended, and the data link switching is performed to switch back to the original network to establish a data service link for data transmission;

If the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, the data transmission is performed through the new network, and vice versa, the data link is switched. Switch back to the original network for data transmission.

Optionally, the reselection condition is at least one of the following: the received signal strength RSSI is less than A, the block error rate BLER is greater than B, and the packet loss rate is greater than C;

The handover condition is at least one of the following: the RSSI is greater than i and the RSSI difference between the preferred network and the poor network is greater than x1, the BLER is less than j, and the difference between the BRY of the poorer network and the better network is greater than x1, and the packet loss rate is less than k. The difference between the packet loss ratio of the poor network and the better network is greater than x1.

Optionally, the timing optimization manner includes:

Set a preferred timer;

When the preference timer expires, it is measured whether the network status of another network is good;

If the network status of the other network is good, the delay measurement timer is started and the link delay measurement is performed on the current network;

Switching the data link from the current SIM card to another SIM card;

After successfully switching and establishing a data service link, perform link delay measurement on the new network;

If the time delay measurement timer expires, the link delay measurement for the new network is ended, and the data link switching is performed to switch back to the original network to establish a data service link for data transmission;

If the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, the data transmission is performed through the new network, and vice versa, the data is executed. Link switching to switch back to the original network for data transmission.

Optionally, the method further includes:

Sending the first MSG message through the current SIM card, and suspending the PDP data link on the current SIM card;

Sending a second MSG message through another SIM card to request to establish/restore a current PDP data link network;

After the network replies, the PDP data link is activated and established by another SIM card to complete the switching of the data link.

Optionally, the method further includes:

If any of the SIM card registration network services fails, the registration timer is started, and the registration of the SIM card is re-completed after the registration timer expires;

During the timing of the registration timer, the radio resources of the dual-card dual-standby terminal are all used by another SIM card that is successfully registered in the network.

The embodiment of the invention further provides a computer readable storage medium storing computer executable instructions for performing the data communication method of any of the above.

The dual card dual standby terminal and the data communication method embodying the invention have the following beneficial effects: the SIM card simultaneously resides in the CS voice service by setting a dual protocol stack (the first protocol stack and the second protocol stack) supporting multiple protocols. And PS data service to improve resource utilization; continuous adjustment during data transmission to avoid transmission interruption caused by abnormality in a certain network, avoid data call drop, improve network utilization and RF Resource utilization, improve user experience; shorten switching time, improve switching efficiency, meet real-time requirements of real-time data services (for example, VOIP, etc.); can realize communication networks such as 3G/4G for both SIM cards (eg LTE, EVDO, etc.).

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings described herein are provided to provide a further understanding of the invention, and are in the Improperly qualified. In the drawing:

1 is a topological structural diagram of a communication network according to an embodiment of the present invention;

2 is a schematic diagram of a communication architecture of a terminal according to an embodiment of the present invention;

3 is a schematic structural diagram of a data service module 40 according to an embodiment of the present invention;

4 is a flowchart of a data communication method according to an embodiment of the present invention;

FIG. 5 is a flowchart of a preferred method of data according to an embodiment of the present invention:

6 is a flow chart of a timing optimization mode according to an embodiment of the present invention;

FIG. 7 is a flowchart of a process of switching a data service link according to an embodiment of the present invention.

Preferred embodiment of the invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The invention will be described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In order to solve the problem that the communication mode of the DSDS terminal in the related art limits the use of the user data service and causes the waste of the radio frequency resource, the embodiment of the present invention provides a dual card dual standby terminal and a data communication method, so as to avoid single SIM card transmission. When the network status is deteriorated, the data service is interrupted, and the first SIM card or the second SIM card can be intelligently selected for data service transmission, thereby improving network utilization and radio resource utilization, thereby improving the technical effect of the user experience.

In the embodiment of the present invention, the first SIM card, the second SIM card, the first protocol stack, the second protocol stack, the data service module, and the TCP/IP protocol stack are set in the dual card dual standby terminal. The TCP/IP protocol stack includes a first virtual WAN transport interface and a second virtual WAN transport interface. The first protocol stack is set such that the first SIM card resides in the PS domain and the CS domain of the network; the second protocol stack is set such that the second SIM card resides in the PS domain and the CS domain of the network; the first virtual WAN transmission interface And the second virtual WAN transmission interface is respectively connected to the first protocol stack and the second protocol stack, configured to transmit data of the first protocol stack and the second protocol stack; the data service module is configured to select the first SIM card or the second The network where the SIM card is located establishes a PS data service link for data transmission.

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings. 1 is a topological structural diagram of a communication network according to an embodiment of the present invention. The terminal 10 of the embodiment of the present invention includes at least two Subscriber Identity Module (SIM) cards, for example, a first SIM card 12 and a second SIM card 14. In some embodiments, the terminal 10 may include more than two SIM cards.

The first SIM card 12 can manage a first user associated with the first technical standard, and the second SIM card 14 can manage a second user associated with the second technical standard.

Each SIM card may have one or more associated telephone numbers, for example, a first telephone number set to the first SIM card 12 and a second telephone number for the second SIM card 14.

The terminal 10 can communicate in the first network 30 via the first base station 20 using at least the first SIM card 12. The terminal 10 can communicate in the second network 32 via the first base station 20 or via a different base station (e.g., the second base station 22) using the second SIM card 14. The first network 30 and the second network 32 may use the same or different radio access technologies to facilitate communication with the terminal 10. It should be understood that only the example in which the terminal 10 communicates over different networks through different base stations is shown in FIG. 1. In addition, the terminal 10 can also communicate on the same network via the same base station, or communicate on the same network via different base stations. and many more.

Terminal 10 may include a radio frequency management module 11 configured to manage communication exchange signaling associated with first SIM card 12 and second SIM card 14 via radio frequency transmission module (RF) 13. The radio frequency management module 11 can include and execute communication protocols and/or manage other protocols using protocols and/or standard proprietary instructions that allow communication with the first network 30 and the second network 32 and/or subscription-specific configuration information. Standard proprietary communication program. In addition, radio frequency transmission module 13 is configured to transmit communication exchange signaling to one or more base stations or other devices in a wireless communication system, or to receive communication exchange signaling from one or more base stations or other devices. For example, the radio frequency transmission module 13 can include one or more of a transmitter, a receiver, a transmit chain assembly, and a radio frequency transmission module in a receive chain assembly.

Example 1

2 is a schematic diagram of a communication architecture of a terminal according to an embodiment of the present invention.

The communication architecture of the terminal 10 of the embodiment of the present invention includes: a radio frequency transmission module 13, a radio frequency management module 11, a first protocol stack 15, a second protocol stack 16, a TCP/IP protocol stack 18, and a data application link. The service 19, the data service module 40, the first virtual WAN transmission interface 171, the second virtual WAN transmission interface 172, the first SIM card 12, and the second SIM card 14.

The first protocol stack 15 and the second protocol stack 16 are Modem protocol stacks, and can support multiple protocols such as LTE/WCDMA/GSM/TDSCDMA/CDMA/EVDO. Thus, the first technical standard and the second technical standard described above may be any wireless technology standard (eg, LTE, WCDMA, TDS-CDMA, GSM, CDMA, EVDOGPRS, EDGE, TD-LTE, etc.), ie, the implementation of the present invention The terminal 10 of the example can implement dual card simultaneous use, for example, LTE, EVOD, and the like. By storing and utilizing the protocol and communication standard information associated with the first and second technical standards, the terminal 10 can actually communicate using all of the communication technology standards supported by the terminal 10.

When the terminal 10 works in the dual card mode, the first SIM card 12 and the second SIM card 14 respectively establish a connection with the corresponding Modem protocol stack (the first protocol stack 15 and the second protocol stack 16), and follow the respective Modem protocol stack. Supported network capabilities, choose the optimal network.

At the same time, the first SIM card 12 and the second SIM card 14 establish data services and voice services with the network through the protocol stacks of each other, so that each SIM card can simultaneously host data and voice services.

In addition, the first protocol stack 15 and the second protocol stack 16 are respectively connected to the first virtual WAN transmission interface 171 and the second virtual WAN transmission interface 172, and the dual WAN port protocol stack architecture is virtualized, thereby facilitating transmission control of routing data. The first virtual WAN transmission interface 171 and the second virtual WAN transmission interface 172 respectively transmit data of the first protocol stack 15 and the second protocol stack 16.

The dual protocol stack (the first protocol stack 15 and the second protocol stack 16) of the embodiment of the present invention can only have one protocol stack as the radio frequency transmitter occupying radio resources at the same time. The radio frequency management module 11 is configured to control the switching of the radio resources. When one protocol stack needs to transmit data, the other protocol stack is in the receiving state.

Referring to FIG. 2, in the embodiment of the present invention, when the terminal 10 operates in the dual card mode, the first SIM card 12 establishes a connection with the first protocol stack 15, and the second SIM card 14 establishes a connection with the second protocol stack 16. Thus, the first SIM card 12 resides in the PS (Packet Service) domain and the CS (Circuit Service) domain of the first network 30 through the first protocol stack 15, whereby the first SIM card 12 can pass through the first network 30. Register CS voice and PS data network services. The second SIM card 14 resides in the PS domain and the CS domain of the first network 30 through the second protocol stack 16, whereby the first SIM card 12 can register the CS voice and PS data network services through the second network 32. Thus, in the embodiment of the present invention, the terminal 10 passes through a dual protocol stack. Two SIM cards can be registered to simultaneously register CS voice and PS data services to improve resource utilization.

The first network 30 and the second network 32 may be different networks of different operators, or may be different or the same network of the same carrier.

FIG. 3 is a schematic structural diagram of a data service module 40 according to an embodiment of the present invention. The data service module 40 includes:

The detecting unit 402 is configured to detect whether there is a data application that needs to establish a data service link.

The determining unit 403 is configured to determine whether the SIM card has established a data service link.

The selecting unit 404 is configured to select an optimal network to establish a data service link for data transmission when no SIM card establishes a data service link. Preferably, the network is determined to be an optimal network according to the currently requested data application characteristics and the network performance of each network.

Data application characteristics may include real-time requirements, packet size, etc., which may be obtained according to specific data applications. In practice, different application characteristics may be defined for different data applications, for example, real-time requirements for defining an application are low. Or high, the real-time requirements of VOIP services are high. Data applications with high real-time requirements have high requirements for network performance. The terminal 10 can store the characteristics of different data applications in the format of the table.

The network performance includes at least one of the following: RSSI (Intensity of Received Signal), SNR (Signal to Noise Ratio), Link Delay, BLER (Block Error Rate), Packet Loss Rate, and the like. The RSSI, the SNR, and the BLER may be obtained according to a cell message (for example, a downlink signal from the base station); the link delay and the packet loss rate may be measured by the terminal 10 transmitting a ping packet through each network.

It should be understood that only network performance may be considered when determining the optimal network.

The determining unit 405 is configured to determine an optimal network according to the currently requested data application characteristics and the network performance of each network when the existing SIM card establishes a data service link, and determine whether the established data service link passes the optimal network. built.

The switching unit 406 is configured to perform a handover of the data link from one SIM card to another SIM card.

Specifically, the switching unit 406 is configured to send the first MSG message by using the current SIM card, suspend the PDP (Packet Data Protocol) data link on the current SIM card, and send the second through another SIM card. MSG message to request to establish/restore the current PDP data link network. After the network replies, activate and establish a PDP data link through another SIM card. Switching into a data link.

The switching unit 406 of the embodiment of the present invention does not need to perform interaction between two SIM cards when performing data service switching. Therefore, when switching, the SIM card standard switching is not required as in the related art, and the switching is shortened. Time, improve switching efficiency, and meet the real-time requirements of real-time data services (for example, VOIP, etc.).

The data service module 40 of the embodiment of the present invention further includes: a data preference unit 407 and a timing preference unit 408. After the terminal 10 establishes a data service link for data transmission according to the above procedure, the data preference unit 407 is configured to switch the data link according to the network performance to perform data transmission using the optimal network; the timing optimization unit 408 is set to be based on the timing time. Switch the data link to use the optimal network for data transmission.

The data preference unit 407 includes:

The condition preset subunit is set to preset reselection conditions and switching conditions. For example, the reselection condition is at least one of the following: the RSSI is less than A, the BLER is greater than B, and the packet loss rate is greater than C. The handover condition is at least one of the following: the RSSI is greater than i and the RSSI difference between the preferred network and the worse network is greater than x1 (eg, RSSI>100 dBm, and RSSISIM1-RSSISIM2>NdBm), BLER is less than j, and the network is poorer. The BLER difference of the excellent network is greater than x2, the packet loss rate is less than k, and the packet loss ratio of the poor network and the better network is greater than x3. In a specific embodiment, A=-110dBm, B=20%, C=30%, i=-100dBm, x1=10dBm, j=10%, x2=10%, k=10%, x3=20% This is for illustrative purposes only and is not intended to limit the scope of the invention.

The reselection judging unit is configured to detect whether the network state of the network where the SIM card (for example, the first SIM card) currently performing data transmission satisfies the reselection condition (for example, the BLER is greater than 10%), and if yes, detect another A status parameter of the network in which a SIM card (eg, a second SIM card) is located.

The first handover judging subunit is configured to perform link delay measurement on the current network and start delay measurement if the state parameter satisfies the handover condition (for example, RSSI>100 dBm and another SIM-RSSI current SIM>NdBm of the RSSI) Timer (PING delay measurement timer); otherwise, continue to use the current network for data transmission.

The first switching subunit is configured to switch the data link from the current SIM card to another SIM card.

The first link delay measurement unit is set to successfully switch and establish a data service link, and then The network performs link delay measurement.

The first detecting subunit is configured to, when detecting that the delay measurement timer expires, end link delay measurement for the new network, perform data link switching to re-switch back to the original network to establish a data service link for data transmission.

The second detecting subunit is configured to perform the link delay measurement during the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, and the data is transmitted through the new network. Then perform data link switching to switch back to the original network for data transmission.

Through the data preference unit, when the network state where the current SIM card is being transmitted is deteriorated, a better network is selected for transmission, which improves network utilization and radio resource utilization, and improves user experience.

The timing preference unit is different from the data preference unit in that the timing preference unit performs a data link handover initiation condition based on the preferred timer, so that the terminal 10 can complete the data link preference and handover in a better network environment. Specifically, the timing optimization unit includes:

Set the subunit and set it to set the preferred timer.

The measurement subunit is set to measure whether the network state of another network is good when the preferred timer expires.

The second handover determining subunit is configured to start a delay measurement timer and perform link delay measurement on the current network when the network state of the other network is good (for example, RSSI>85 dBm); otherwise, continue to use the current network. data transmission.

The second switching subunit is configured to switch the data link from the current SIM card to another SIM card.

The second link delay measurement sub-unit is configured to perform link delay measurement on the new network after successfully switching and establishing a data service link.

The third detecting subunit is configured to: when detecting that the delay measurement timer expires, end link delay measurement for the new network, perform data link switching to re-switch back to the original network to establish a data service link for data transmission.

The fourth detecting subunit is configured to complete the link delay measurement within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network (for example, greater than 500 ms), then pass the new network. Perform data transmission. Otherwise, perform data link switching to switch back to the original network. data transmission.

The data preference unit and the timing optimization unit in the embodiment of the present invention implement continuous adjustment during data transmission, avoiding problems such as transmission interruption caused by abnormality in a certain network, and improving network utilization and utilization of radio frequency resources. , improved user experience.

The terminal of the embodiment of the present invention implements the dual protocol stack (the first protocol stack and the second protocol stack) supporting multiple protocols, so that the SIM card simultaneously hosts the CS voice service and the PS data service, thereby improving resource utilization; Both SIM cards can use 3G/4G communication networks (for example, LTE, EVDO, etc.); realize continuous adjustment during data transmission, avoiding transmission interruption caused by abnormality in a certain network. It avoids data service dropped calls, improves network utilization and RF resource utilization, improves user experience, shortens switching time, improves switching efficiency, and satisfies real-time data services (eg, VOIP, etc.) for real-time performance. Claim.

Example 2

Referring to FIG. 4, a data communication method according to an embodiment of the present invention includes the following steps:

Step 100: The first SIM card 12 performs network registration to reside in the PS domain and the CS domain of the first network 30 through the first protocol stack. The second SIM card 14 performs network registration to reside in the PS domain and the CS domain of the second network 32 through the second protocol stack.

In the embodiment of the present invention, when both the first SIM card 12 and the second SIM card 14 successfully register the network, the terminal 10 enters an idle mode (IDLE).

Since the terminal 10 has only one TX channel, if any SIM card registration network service fails, the registration timer (Reg Timer) is started, and the registration of the SIM card is re-completed after the registration timer expires. During the timing of registering the timer, the radio resources (transmitting the TX channel and receiving the RX channel) of the terminal 10 are all used by the SIM card of another registered network. Thereby, resource utilization is improved and waste of radio frequency resources is avoided.

After the first SIM card 12 and the second SIM card 14 are successfully registered, their respective data transmission functions are turned on. It should be understood that, in the embodiment of the present invention, the data transmission function of the first SIM card 12 and the second SIM card 14 may be simultaneously enabled, and the opening mode may be that the registration is successful, that is, the default is enabled or the registration is successful, and then manually opened by the user (through the terminal) The user interface of 10 provides an on/off button, etc., and the like, which is not limited in this embodiment of the present invention.

Step 102: Detect whether there is a data application that needs to establish a data service link; if yes, go to step 104.

Step 104: If it is detected that the data application needs to establish a data service link, it is determined whether the SIM card has established a data service link (ie, data transmission is in progress). If not, then go to step 106, and if yes, go to step 108.

Step 106: If there is no SIM card to establish a data service link, select an optimal network to establish a data service link for data transmission.

Step 108: If the existing SIM card establishes a data service link, determine the optimal network according to the currently requested data application characteristics and the network performance of the first network and the second network; and determine whether the established data service link is passed. The optimal network is established, if not, then a data link switch is performed at step 110 (the handover process will be described later) to select the optimal network for data transmission.

Preferably, the network is determined to be an optimal network according to the currently requested data application characteristics and the network performance of each network.

Data application characteristics may include real-time requirements, packet size, etc., which may be obtained according to specific data applications. In practice, different application characteristics may be defined for different data applications, for example, real-time requirements for defining an application are low. Or high, the real-time requirements of VOIP services are high. Data applications with high real-time requirements have high requirements for network performance. The terminal 10 can store the characteristics of different data applications according to the format of the table, for example, according to the manner of Table 1:

Application Name	Application characteristics	Packet size
APP1	Low real-time performance	64M
APP2	High real-time performance	128M
VOIP business	High real-time performance	-
......	......

Table 1

The network performance includes at least one of the following: RSSI (Intensity of Received Signal), SNR (Signal to Noise Ratio), Link Delay, BLER (Block Error Rate), Packet Loss Rate, and the like. The RSSI, the SNR, and the BLER may be obtained according to a cell message (for example, a downlink signal from the base station); the link delay and the packet loss rate may be measured by the terminal 10 transmitting a ping packet through each network.

It should be understood that only network performance may be considered when determining the optimal network.

After the terminal 10 establishes a data service link for data transmission according to the above procedure (ie, the first SIM card and the second SIM card have respectively registered the voice and data services of the first network and the second network, and have activated and established a The data service link of the SIM card) adjusts and switches the data transmission in the following two ways:

Mode 1, data preferred mode.

Referring to FIG. 5, the data preferred manner of the embodiment of the present invention includes:

Step 200: Set a reselection condition and a switching condition in advance. For example, the reselection condition is at least one of the following: the RSSI is less than A, the BLER is greater than B, and the packet loss rate is greater than C. The handover condition is at least one of the following: the RSSI is greater than i and the RSSI difference between the preferred network and the worse network is greater than x1 (eg, RSSI>100 dBm, and RSSISIM1-RSSISIM2>NdBm), BLER is less than j, and the network is poorer. The BLER difference of the excellent network is greater than x1, the packet loss rate is less than k, and the packet loss ratio difference between the poor network and the better network is greater than x1.

Step 202: Detect whether the network status of the network where the SIM card (for example, the first SIM card) currently performing data transmission meets the reselection condition (for example, the BLER is greater than 10%), and if so, detect another SIM card (for example, , the second SIM card) the status parameter of the network.

Step 204: If the state parameter satisfies the handover condition (for example, RSSI>100 dBm, and the RSSI is another SIM-RSSI current SIM>NdBm), perform link delay measurement on the current network and start a delay measurement timer (PING delay) Measurement timer); otherwise, continue to use the current network for data transmission, the process ends.

Step 206: Switch the data link from the current SIM card to another SIM card.

Step 208: After successfully switching and establishing a data service link, perform link delay measurement on the new network.

Step 210: If it is detected that the delay measurement timer expires, the link delay measurement for the new network is ended, and the data link switching is performed to switch back to the original network to establish a data service link for data transmission, and the process ends.

Step 212: If the delay of the delay measurement timer is completed, the link delay measurement is completed, and If the link delay data of the new network is better than the previous network, the data transmission is performed through the new network. Otherwise, the data link switching is performed to switch back to the original network for data transmission.

According to the preferred method of the data in the embodiment of the present invention, when the network state where the SIM card currently transmitting data is degraded, a better network is selected for transmission, network utilization and radio frequency resource utilization are improved, and the user experience is improved.

Mode 2, timing preferred mode.

The timing preference mode is different from the data preference mode in that the timing preference mode is based on the preferred timer to perform the data link switching initiation condition, so that the terminal 10 can complete the data link preference and handover in a better network environment. Specifically, referring to FIG. 6, the timing optimization manner includes:

Step 300: Set a preferred timer. Before step 300, the first SIM card and the second SIM card respectively register the voice and data services of the first network and the second network, and activate and establish a data service link of the SIM card.

Step 302: When the preference timer expires, it is measured whether the network status of another network is good.

Step 304: If the network status of the other network is good (for example, RSSI>85 dBm), start the delay measurement timer and perform link delay measurement on the current network; otherwise, continue to use the current network for data transmission, and the process ends.

Step 306: Switch the data link from the current SIM card to another SIM card.

Step 308: After successfully switching and establishing a data service link, perform link delay measurement on the new network.

Step 310: If it is detected that the delay measurement timer expires, the link delay measurement for the new network is ended, and the data link switching is performed to switch back to the original network to establish a data service link for data transmission.

Step 312: If the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network (for example, greater than 500 ms), the data transmission is performed through the new network. Otherwise, data link switching is performed to switch back to the original network for data transmission.

Through the above two methods, the embodiment of the present invention can implement continuous adjustment during data transmission, avoiding problems such as transmission interruption caused by abnormality of a certain network, and improving network utilization. Rate and RF resource utilization to improve user experience.

The switching process of the data service link in the above embodiment of the present invention will be described below with reference to FIG. The data link switching process in the embodiment of the present invention includes:

Step 400: Send the first MSG message through the current SIM card, and suspend the PDP data link on the current SIM card. The first MSG message here is used to notify the network to suspend sending data.

Step 402: Send a second MSG message through another SIM card to request to establish/restore the current PDP data link network.

Step 404: After the network is replied, the PDP data link is activated and established by another SIM card, and the switching of the data service link is completed.

Specifically, in the following, taking the data transmission from the first SIM card 12 to the second SIM card 14 as an example, the process of the above-mentioned handover involved in the embodiment of the present invention is described in detail:

First, the MSG message is sent through the first SIM card 12 and the PDP data link on the first SIM card is suspended. The MSG message here (eg, an LTE network terminal ESR message) is used to notify the network to suspend transmission of data.

The MSG message is then sent over the second SIM card 14 to request to establish/restore the current PDP data link network.

After the network replies, the PDM data link is activated and established by the second SIM card 14, and the switching of the data service link from the first SIM card 12 to the second SIM card 14 is completed.

According to the foregoing handover procedure of the embodiment of the present invention, when data service switching is performed, interaction between two SIM cards is not required, thereby eliminating the need to perform SIM card switching as in the prior art when switching, and shortening The switching time improves the switching efficiency and meets the real-time requirements of real-time data services (for example, VOIP, etc.).

The data communication method of the embodiment of the present invention can implement the SIM card to simultaneously host the CS voice and the PS data service through the dual protocol stack, thereby improving the resource utilization rate; and the two SIM cards can use the communication network such as 3G/4G (for example, LTE, EVDO, etc.; can be continuously adjusted during the data transmission process to avoid transmission interruptions caused by abnormality in a certain network, avoid data call drop, improve network utilization and utilization of radio resources, Improve user experience; shortened switching time In the meantime, the switching efficiency is improved to meet the real-time requirements of real-time data services (for example, VOIP, etc.).

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specified.

Any process or method description in the flowcharts or otherwise described in the embodiments of the invention may be understood to represent code that includes one or more executable instructions for implementing the steps of a particular logical function or process. Modules, segments or portions, and the scope of the embodiments of the invention includes additional implementations, in which the functions may be performed in a substantially simultaneous manner or in an inverse order depending on the functions involved, in the order shown or discussed. This should be understood by those skilled in the art of the embodiments of the present invention.

The functional units in the various embodiments of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The integrated modules, if implemented in the form of software functional modules and sold or used as stand-alone products, may also be stored in a computer readable storage medium. The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative and not restrictive, and those skilled in the art In the light of the present invention, many forms may be made without departing from the spirit and scope of the invention as claimed.

Industrial applicability

The dual card dual standby terminal and the data communication method provided by the embodiment of the invention realize that the SIM card simultaneously resides in the CS voice service and the PS data service; and avoids problems such as transmission interruption caused by abnormality of a certain network, and improves resource utilization. , thus improving the user experience.

Claims (20)

1. A dual card dual standby terminal includes: a first subscriber identity module SIM card, a second SIM card, a first protocol stack, a second protocol stack, a data service module, and a transmission control protocol/internet protocol TCP/IP protocol stack; among them,

   The TCP/IP protocol stack includes a first virtual wide area network WAN transmission interface and a second virtual WAN transmission interface;

   The first SIM card resides in the packet domain PS domain and the circuit domain CS domain of the network through the first protocol stack;

   The second SIM card resides in the PS domain and the CS domain of the network through the second protocol stack;

   The first virtual WAN transmission interface and the second virtual WAN transmission interface are respectively connected to the first protocol stack and the second protocol stack, and configured to transmit data of the first protocol stack and the second protocol stack;

   The data service module is configured to select a network where the first SIM card or the second SIM card is located to establish a PS data service link for data transmission.
2. The dual card dual standby terminal according to claim 1, wherein the first protocol stack and the second protocol stack simultaneously support a Long Term Evolution (LTE) protocol, and/or a Wideband Code Division Multiple Access (WCDMA) protocol, and/or a global mobile communication System GSM protocol, and/or time division synchronous code division multiple access TDS CDMA protocol, and/or code division multiple access CDMA protocol, and/or EVDO protocol.
3. The dual card dual standby terminal according to claim 1, further comprising: a radio frequency transmission module and a radio frequency management module; wherein

   a radio frequency transmission module configured to transmit communication exchange signaling to one or more base stations or other devices in the wireless communication system, or to receive communication exchange signaling from one or more base stations or other devices;

   A radio frequency management module is configured to manage communication exchange signaling associated with the first SIM card and the second SIM card via a radio frequency transmission module.
4. The dual card dual standby terminal according to claim 1, wherein the data service module comprises:

   a detecting unit configured to detect whether a data application needs to establish a data service link;

   a judging unit, configured to determine whether a SIM card has established a data service link;

   Selecting a unit, configured to select an optimal network to establish a data service link for data transmission if no SIM card establishes a data service link;

   The determining unit is configured to determine an optimal network according to the data application characteristics of the current request and the network performance of each network if the existing SIM card establishes a data service link, and determine whether the established data service link passes the optimal network. built;

   The switching unit is configured to perform switching of the data link from one SIM card to another SIM card if the determination result of the determining unit is not established by the optimal network.
5. The dual card dual standby terminal according to claim 4, wherein the switching unit is specifically configured to: send a first MSG message through the current SIM card, suspend the PDP data link on the current SIM card, and pass another A SIM card sends a second MSG message to request to establish/restore the current PDP data link network. After the network replies, the PDP data link is activated and established by another SIM card to complete the switching of the data link.
6. The dual card dual standby terminal according to claim 5, wherein the data service module further comprises:

   a data preference unit configured to switch data links according to network performance to perform data transmission using an optimal network;

   The timing preference unit is configured to switch the data link according to the timing time to perform data transmission using the optimal network.
7. The dual card dual standby terminal according to claim 6, wherein the data preference unit comprises:

   Condition preset subunit, set to pre-set reselection conditions and switching conditions;

   The reselection judging unit is configured to detect whether the network state of the network where the SIM card currently transmitting data is located satisfies the reselection condition, and if yes, detect the state parameter of the network where the other SIM card is located;

   The first handover determining subunit is configured to perform link delay measurement on the current network and start a delay measurement timer if the status parameter satisfies the handover condition; otherwise, continue to use the current network for data transmission;

   a first switching subunit configured to switch data transmission from a current SIM card to another SIM card;

   The first link delay measurement unit is set to successfully switch and establish a data service link, and then The network performs link delay measurement;

   The first detecting subunit is configured to end the link delay measurement for the new network, and perform data link switching to re-switch back to the original network to establish a data service link for data transmission if the time delay measurement timer expires.

   The second detecting subunit is configured to: if the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, the data transmission is performed through the new network, and vice versa. Then, data link switching is performed to switch back to the original network for data transmission.
8. The dual card dual standby terminal according to claim 6, wherein the timing preference unit comprises:

   Set the subunit, set to set the preferred timer;

   Measuring subunit, configured to measure whether the network status of another network is good when the preferred timer expires;

   The second handover determining subunit is configured to start a delay measurement timer and perform link delay measurement on the current network if the network status of the other network is good; otherwise, continue to use the current network for data transmission;

   a second switching subunit, configured to switch the data link from the current SIM card to another SIM card;

   The second link delay measurement sub-unit is configured to perform link delay measurement on the new network after successfully switching and establishing a data service link;

   The third detecting subunit is configured to end the link delay measurement for the new network, and perform the data link switching to re-switch back to the original network to establish a data service link for data transmission if the time delay measurement timer expires.

   The fourth detecting subunit is configured to: if the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, the data transmission is performed through the new network, and vice versa. Then, data link switching is performed to switch back to the original network for data transmission.
9. A data communication method is applied to a dual card dual standby terminal, wherein the dual card dual standby terminal comprises: a first SIM card, a second SIM card, a first protocol stack, a second protocol stack, a data service module, and a TCP /IP protocol stack; the TCP/IP protocol stack includes a first virtual WAN transmission interface and a second virtual WAN transmission interface; the first virtual WAN transmission interface and the second virtual WAN transmission interface The port is respectively connected to the first protocol stack and the second protocol stack;

   Also includes:

   The first SIM card performs network registration to reside in a PS domain and a CS domain of the network through the first protocol stack;

   The second SIM card performs network registration to reside in the PS domain and the CS domain of the network through the second protocol stack;

   The data service module detects that a data application needs to establish a data service link, and then selects a network where the first SIM card or the second SIM card is located to establish a PS data service link for data transmission;

   The first virtual WAN transmission interface and the second virtual WAN transmission interface respectively transmit data of the first protocol stack and the second protocol stack.
10. The data communication method according to claim 9, wherein said first protocol stack and said second protocol stack simultaneously support Long Term Evolution (LTE) protocol, and/or Wideband Code Division Multiple Access (WCDMA) protocol, and/or Global System for Mobile Communications (GSM) Protocol, and/or time division synchronized code division multiple access TDS CDMA protocol, and / or code division multiple access CDMA protocol, and / or EVDO protocol.
11. The data communication method according to claim 9, further comprising:

    a radio frequency transmission module configured to transmit communication exchange signaling to one or more base stations or other devices in a wireless communication system, or to receive communication exchange signaling from one or more base stations or other devices;

    Communication exchange signaling associated with the first SIM card and the second SIM card is managed via a radio frequency transmission module.
12. The data communication method according to claim 9, further comprising:

    If the data service module detects that the data application needs to establish a data service link, it determines whether the SIM card has established a data service link, and if not, selects an optimal network to establish a data service link for data transmission;

    If so, it is determined whether the established data service link is established through the optimal network, and if not, the data link switch is performed to switch to the optimal network establishment data service link for data transmission.
13. The data communication method according to claim 12, the method further comprising: determining the optimal network based on data application characteristics and network performance.
14. The data communication method according to claim 12, further comprising: adjusting switching of the data transmission according to a data preference manner or a timing preference manner.
15. The data communication method according to claim 14, wherein said data preferred manner comprises:

    Pre-selection re-selection conditions and switching conditions;

    Detecting whether the network status of the network where the SIM card currently transmitting data is located meets the reselection condition, and if so, detecting the status parameter of the network where the other SIM card is located;

    If the state parameter meets the handover condition, perform link delay measurement on the current network and start a delay measurement timer, and switch the data link from the current SIM card to another SIM card;

    After successfully switching and establishing a data service link, perform link delay measurement on the new network;

    If the delay measurement timer is detected, the link delay measurement for the new network is ended, and the data link switching is performed to switch back to the original network to establish a data service link for data transmission;

    If the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, the data transmission is performed through the new network, and vice versa, the data link is switched. Switch back to the original network for data transmission.
16. The data communication method according to claim 15, wherein the reselection condition is at least one of: a strength of the received signal RSSI is less than A, a block error rate BLER is greater than B, and a packet loss rate is greater than C;

    The handover condition is at least one of the following: the RSSI is greater than i and the RSSI difference between the preferred network and the poor network is greater than x1, the BLER is less than j, and the difference between the BRY of the poorer network and the better network is greater than x1, and the packet loss rate is less than k. The difference between the packet loss ratio of the poor network and the better network is greater than x1.
17. The data communication method according to claim 14, wherein said timing preferred manner comprises:

    Set a preferred timer;

    When the preference timer expires, it is measured whether the network status of another network is good;

    If the network status of the other network is good, the delay measurement timer is started and the link delay measurement is performed on the current network;

    Switching the data link from the current SIM card to another SIM card;

    After successfully switching and establishing a data service link, perform link delay measurement on the new network;

    If the time delay measurement timer expires, the link delay measurement for the new network is ended, and the data link switching is performed to switch back to the original network to establish a data service link for data transmission;

    If the link delay measurement is completed within the timing of the delay measurement timer, and the link delay data of the new network is better than the previous network, the data transmission is performed through the new network, and vice versa, the data link is switched. Switch back to the original network for data transmission.
18. The data communication method according to any one of claims 10-17, further comprising:

    Sending the first MSG message through the current SIM card, and suspending the PDP data link on the current SIM card;

    Sending a second MSG message through another SIM card to request to establish/restore a current PDP data link network;

    After the network replies, the PDP data link is activated and established by another SIM card to complete the switching of the data link.
19. The data communication method according to claim 10, wherein the method further comprises:

    If any of the SIM card registration network services fails, the registration timer is started, and the registration of the SIM card is re-completed after the registration timer expires;

    During the timing of the registration timer, the radio resources of the dual-card dual-standby terminal are all used by another SIM card that is successfully registered in the network.
20. A computer readable storage medium storing computer executable instructions for performing the data communication method of any of claims 9-19.

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