CN113038424A - Calling method and device for LTE-R and GSM-R dual-mode terminal - Google Patents

Calling method and device for LTE-R and GSM-R dual-mode terminal Download PDF

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CN113038424A
CN113038424A CN201911333694.XA CN201911333694A CN113038424A CN 113038424 A CN113038424 A CN 113038424A CN 201911333694 A CN201911333694 A CN 201911333694A CN 113038424 A CN113038424 A CN 113038424A
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terminal
gsm
mcptt
lte
network
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CN113038424B (en
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黄杨晖
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Chengdu TD Tech Ltd
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Chengdu TD Tech Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

The embodiment of the invention provides a calling method and a calling device of an LTE-R and GSM-R dual-mode terminal. A first terminal in the LTE-R network sends a first standard SIP INVITE request containing an MCPTT identifier of a second terminal to an IMS core network, wherein the second terminal is a dual-mode terminal of LTE-R and GSM-R, and the MCPTT identifier of the second terminal is configured to be consistent with MSISDN; the IMS core network sends a first standard SIP INVITE request to the MCPTT server; when the MCPTT server determines that the MCPTT identification of the second terminal is not registered in the LTE-R network, sending a private SIP INVITE request to an IMS core network; the IMS core network forwards the private SIP INVITE request to the GSM-R gateway. The embodiment of the invention can realize the uniform number calling of the dual-mode terminal meeting the railway industry.

Description

Calling method and device for LTE-R and GSM-R dual-mode terminal
Technical Field
The invention belongs to the technical field of Long Term Evolution-Railway (Long Term Evolution-Railway), and particularly relates to a calling method and a calling device for a GSM-R (Global System for Mobile Communication, GSM-R) dual-mode terminal of an LTE-R and a Global System for Mobile Communication.
Background
The communication system is one of key infrastructures of the railway and bears tasks such as railway dispatching command, train operation control, fault early warning, dangerous case notification, emergency rescue and the like. Railway communications are used in a variety of situations, such as in-car, inter-car, car-to-railway, etc., and thus railway operators typically employ both narrowband and broadband wireless communication technologies for train wireless communication systems, such as TETRA, Digital Mobile Radio (DMR), GSM, and Wi-Fi. The GSM-R is a second-generation mobile communication technology, belongs to a narrow-band communication system, has low frequency spectrum utilization rate, mainly bears voice service and a small amount of data service, and has low data rate, so that the development of various new services on the existing GSM-R platform is difficult. Moreover, as the railway communication network is developed toward convergence, broadband, innovation, and the like, there is a need to integrate all communication requirements into a single network for operation.
The LTE-R is a railway next generation wireless communication system and has the characteristics of high safety and reliability, high-speed transmission, multi-service fusion and the like. In a railway system, the latest LTE-R is based on a 3GPP key task push-to-talk (MCPTT) trunking standard, but the current stock railway trunking standard is GSM-R, so after an LTE-R network is newly built, a terminal is required to support dual-mode (GSM-R and LTE-R dual-mode) single standby, and the terminal under the LTE-R can be required to have a call service with a dual-mode terminal intercommunication point under the GSM-R.
However, current MCPTT solutions do not support unified number calls for GSM-R and LTE-R dual mode terminals.
Disclosure of Invention
The embodiment of the invention provides a calling method and a calling device of an LTE-R and GSM-R dual-mode terminal.
The technical scheme of the embodiment of the invention is as follows:
a calling method of an LTE-R and GSM-R dual-mode terminal comprises the following steps:
a first terminal in an LTE-R network sends a first standard Session Initiation Protocol (SIP) INVITE (INVITE) request containing a mission critical push-to-talk (MCPTT) identification of a second terminal to an IP Multimedia Subsystem (IMS) core network to call the second terminal, wherein the second terminal is a dual-mode terminal of LTE-R and GSM-R, and the MCPTT identification of the second terminal is configured to be consistent with a mobile station identification number (MSISDN) of the second terminal;
the IMS core network sends the first standard SIP INVITE request to an MCPTT server;
when the MCPTT server determines that the MCPTT identification of the second terminal is not registered in the LTE-R network, sending a private SIP INVITE request which contains the MCPTT identification of the second terminal and is filled with the MCPTT identification of the first terminal in a logic initiator header domain to an IMS core network;
the IMS core network forwards the private SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the private SIP INVITE request for the GSM-R system call.
In one embodiment, further comprising:
and when the MCPTT server determines that the MCPTT identification of the second terminal is registered in the LTE-R network, sending a second standard SIP INVITE request which contains the MCPTT identification of the second terminal and is filled with the Public Service Identification (PSI) of the MCPTT server in a logic initiator header domain to an IMS core network.
In one embodiment, further comprising:
when the IMS core network determines that the MCPTT identity of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the second standard SIP INVITE request for a GSM-R system call.
In one embodiment, further comprising: when the IMS core network determines that the MCPTT identity of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is not registered in the GSM-R network, forwarding the second criteria SIP INVITE request to the second terminal to call the second terminal.
In one embodiment, further comprising: when the IMS core network determines that the MCPTT identity of the second terminal is not registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the second standard SIP INVITE request for a GSM-R system call.
A calling apparatus for a dual mode LTE-R and GSM-R terminal, the apparatus being disposed in an IMS core network, the apparatus comprising:
a receiving module, configured to receive, from a first terminal in an LTE-R network, a first standard session initiation protocol invite SIP INVITE request containing a mission critical push-to-talk MCPTT identifier of the second terminal for calling the second terminal, wherein the second terminal is a dual mode terminal of LTE-R and GSM-R, and the MCPTT identifier of the second terminal is configured to be consistent with a mobile station identification number, MSISDN, of the second terminal;
a sending module for sending the first criteria SIP INVITE request to an MCPTT server;
wherein when the MCPTT server determines that the MCPTT identification of the second terminal is not registered in the LTE-R network, sending a private SIP INVITE request containing the MCPTT identification of the second terminal, filled with the MCPTT identification of the first terminal in a logical initiator header field, to the receiving module;
wherein the sending module is further configured to forward the private SIP INVITE request to a GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the private SIP INVITE request for the GSM-R system call.
In one embodiment, wherein when the MCPTT server determines that the MCPTT identity of the second terminal is registered in the LTE-R network, a second criteria SIP INVITE request containing the MCPTT identity of the second terminal, filled with the public service identity, PSI, of the MCPTT server in the logical initiator header field, is sent to the receiving module.
In one embodiment, the sending module is further configured to, when it is determined that the MCPTT identifier of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to a GSM-R gateway to request, via the GSM-R gateway, a GSM-R system call for the MCPTT identifier of the second terminal extracted from the second standard SIP INVITE request.
In one embodiment, the sending module is further configured to forward the second criterion SIP INVITE request to the second terminal to call the second terminal when it is determined that the MCPTT identifier of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is not registered in the GSM-R network.
In one embodiment, the sending module is further configured to, when it is determined that the MCPTT identifier of the second terminal is not registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to a GSM-R gateway to request, via the GSM-R gateway, a GSM-R system call for the MCPTT identifier of the second terminal extracted from the second standard SIP INVITE request.
A calling device of an LTE-R and GSM-R dual-mode terminal comprises a processor and a memory;
the memory stores an application program executable by the processor for causing the processor to execute the call method of the dual mode terminal for LTE-R and GSM-R as described in any one of the above.
A computer readable storage medium having stored therein computer readable instructions for executing the method for calling of a dual mode LTE-R and GSM-R terminal as described in any one of the above.
As can be seen from the foregoing technical solutions, in the embodiments of the present invention, a first terminal in an LTE-R network sends a first standard SIP INVITE request including an MCPTT identifier of a second terminal to an IMS core network, where the second terminal is a dual-mode terminal of LTE-R and GSM-R, and the MCPTT identifier of the second terminal is configured to be consistent with an MSISDN; the IMS core network sends a first standard SIP INVITE request to the MCPTT server; when the MCPTT server determines that the MCPTT identification of the second terminal is not registered in the LTE-R network, sending a private SIP INVITE request to an IMS core network; the IMS core network forwards the private SIP INVITE request to the GSM-R gateway. Therefore, the embodiment of the invention can realize the uniform number calling of the dual-mode terminal meeting the requirement of the railway industry.
Drawings
Fig. 1 is a flow chart of a calling method of an LTE-R and GSM-R dual-mode terminal according to the present invention.
Fig. 2 is an exemplary diagram of a call for a dual mode LTE-R and GSM-R terminal according to the present invention.
Fig. 3 is a structural diagram of a calling device of a dual mode terminal for LTE-R and GSM-R according to the present invention.
FIG. 4 is a schematic diagram of LTE-R and GSM-R networking according to the present invention.
Fig. 5 is a block diagram of a calling device of a dual mode terminal for LTE-R and GSM-R having a memory-processor architecture according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings.
For simplicity and clarity of description, the invention will be described below by describing several representative embodiments. Numerous details of the embodiments are set forth to provide an understanding of the principles of the invention. It will be apparent, however, that the invention may be practiced without these specific details. Some embodiments are not described in detail, but rather are merely provided as frameworks, in order to avoid unnecessarily obscuring aspects of the invention. Hereinafter, "including" means "including but not limited to", "according to … …" means "at least according to … …, but not limited to … … only". In view of the language convention of chinese, the following description, when it does not specifically state the number of a component, means that the component may be one or more, or may be understood as at least one.
The applicant found that: in the LTE-R network, the number called by the Subscriber is the MCPTT Identification (ID), and in the GSM-R network, the number called by the Subscriber is the Mobile Station identification number (MSISDN) of the Subscriber Identity Module (SIM), i.e. the Mobile phone number. If the dual mode terminal is expected to be uniform for external numbers, the MCPTT ID of the terminal and the MSISDN of the SIM card of the terminal need to be configured to be the same. Moreover, when the LTE-R user calls the GSM-R user to establish a point call, the MCPTT server addresses the called terminal number, because the GSM-R terminal is not registered in the LTE-R server, but the MCPTT server can not directly reject the call reply failure, the embodiment of the invention constructs a private SIP INVITE to be sent to the IMS core network, wherein the request URI (request URI) in SIP INVITE and the logic receiving place (to) header field of the request carry the called IMPU to be set as the value of MCPTTD, the from header field carries the number MCPTTD of the calling, the IMS core network knows that the call is sent to the GSM-R terminal according to the private SIP INVITE message, and then the call is sent to the GSM-R system through the GSM-R gateway route.
Thus, the applicant found that: and the LTE-R user account and the SIM card are bound, and if the MCPTTID of the user is inconsistent with the MSISDN of the logged-in terminal SIM card, the MCPTT ID is called and the terminal under the GSM-R cannot be called.
It can be seen that, in order to solve the defect that the current MCPTT solution does not support unified number calling for GSM-R and LTE-R dual-mode terminals, the embodiment of the present invention configures the MCPTT ID to be the same as the MSISDN of the SIM card of the terminal used by the user, and if the MCPTT server finds that the called is not registered when the called is addressed, a private SIP INVITE message is generated, where the Request URI and the to header field carry the IMPU consisting of the called MCPTT tid, and the logical initiator (from) header field carries the number MCPTT tid of the calling, so that the IMS core network can know that the call is sent to the GSM-R terminal, and then the call is routed to the GSM-R system through the GSM-R gateway.
Fig. 1 is a flow chart of a calling method of an LTE-R and GSM-R dual-mode terminal according to the present invention.
As shown in fig. 1, the method includes:
step 101: a first terminal in the LTE-R network sends a first standard SIP INVITE request to the IMS core network containing an MCPTT identification of a second terminal to call the second terminal, where the second terminal is a dual mode LTE-R and GSM-R terminal and the MCPTT identification of the second terminal is configured to be consistent with the MSISDN of the second terminal.
Wherein, when a user opens an account in an account opening server in an LTE-R network, the MCPTT Identification (ID) of the user and the MSISDN number (for example, 13911112222) of the SIM card bound by the user can be configured to be the same.
Step 102: the IMS core network sends a first standard SIP INVITE request to the MCPTT server.
Step 103: when the MCPTT server determines that the MCPTT identification of the second terminal is not registered in the LTE-R network, a private SIP INVITE request containing the MCPTT identification of the second terminal and filled with the MCPTT identification of the first terminal in the logical initiator header field is sent to the IMS core network.
Step 104: the IMS core network forwards the private SIP INVITE request to the GSM-R gateway to request the GSM-R system via the GSM-R gateway to call the MCPTT identity of the second terminal extracted from the private SIP INVITE request.
Wherein, when the MCPTT server determines that the MCPTT identification of the second terminal is not registered in the LTE-R network, a private SIP INVITE request containing the MCPTT identification of the second terminal and filled with the MCPTT identification of the first terminal in a logical initiator (from) header field is sent to the IMS core network. Specifically, in the private SIP INVITE request, the MCPTT Identity of the first terminal as the calling is filled in the logical initiator (from) header field, while the IP Multimedia Public Identity (IMPU) consisting of the MCPTT Identity of the second terminal is carried in both the logical recipient (to) header field and the request URI. The IMS core network finds that the logical originator header field requested by the private SIP INVITE is filled with the MCPTT id of the first terminal as a calling party, and can learn that the call is sent to the GSM-R terminal based on the private SIP INVITE request, so that the call is routed to the GSM-R system through the GSM-R gateway.
In one embodiment, the method further comprises: when the MCPTT server determines that the MCPTT identification of the second terminal is registered in the LTE-R network, sending a second standard SIP INVITE request which contains the MCPTT identification of the second terminal and is filled with the Public Service Identification (PSI) of the MCPTT server in a logic initiator header domain to an IMS core network.
Wherein, when the MCPTT server determines that the MCPTT identification of the second terminal is registered in the LTE-R network, sending a second standard SIP INVITE request containing the MCPTT identification of the second terminal and the PSI filled with the MCPTT server in a logic initiator (from) header domain to the IMS core network. Specifically, in the second standard SIP INVITE request, the IMPU consisting of the MCPTT identity of the second terminal is carried in both the logical receive (to) header field and the request URI, and the PSI of the MCPTT server is filled in the logical initiator (from) header field. The IMS core network further determines whether the second terminal is registered in the LTE-R network and the GSM-R network by itself based on the request of the second standard SIP INVITE, and performs corresponding processing. Wherein:
in one embodiment, the method further comprises: when the IMS core network determines that the MCPTT identity of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, the second standard SIP INVITE request is forwarded to the GSM-R gateway to request, via the GSM-R gateway, the GSM-R system call for the MCPTT identity of the second terminal extracted from the second standard SIP INVITE request.
Here, when the IMS core network determines that the MCPTT identity of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, the call request is forwarded to the GSM-R system to complete the call by the GSM-R system.
In one embodiment, the method further comprises: when the IMS core network determines that the MCPTT identity of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is not registered in the GSM-R network, the second criteria SIP INVITE request is forwarded to the second terminal to call the second terminal.
Here, when the IMS core network determines that the MCPTT identity of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is not registered in the GSM-R network, the IMS core network directly forwards the call request to the second terminal in the LTE-R network to complete the call to the second terminal.
In one embodiment, the method further comprises: when the IMS core network determines that the MCPTT identity of the second terminal is not registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the second standard SIP INVITE request for a GSM-R system call.
Here, the IMS core further determines the registration status of the second terminal even when the MCPTT server has previously determined that the MCPTT identity of the second terminal is registered in the LTE-R network, wherein when it is determined that the MCPTT identity of the second terminal is not registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, the IMS core then forwards the second standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the GSM-R system call for the MCPTT identity of the second terminal extracted from the second standard SIP INVITE request.
Here, the call request is forwarded to the GSM-R system to complete the call by the GSM-R system when the IMS core network determines that the MCPTT identity of the second terminal is not registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, even when the MCPTT server has previously determined that the MCPTT identity of the second terminal is registered in the LTE-R network.
Fig. 2 is an exemplary diagram of a call for a dual mode LTE-R and GSM-R terminal according to the present invention.
In advance, when an account is opened on an account opening server of each LTE-R and GSM-R dual-mode terminal LTE-R network, the MCPTT ID configured respectively is consistent with the MSISDN number of the bound SIM card.
Specific application scenarios are described below:
a first application scenario: the UE1 is in an LTE-R network, the dual mode terminal UE2 is in a GSM-R network, and the UE1 in the LTE-R network calls the dual mode terminal UE2 in the GSM-R network.
First, a UE1 user dials an MCPTT ID (e.g. 13911112222) of UE2 for a call, and UE1 sends an MCPTT standard SIP INVITE message in 3GPP protocol to the IMS core network, where the standard SIP INVITE message carries the called number MCPTTID 13911112222. The IMS core network forwards the SIP INVITE message to the MCPTT server.
The MCPTT server then queries whether the called number (13911112222) is registered in the LTE-R network. Wherein:
(1) when the MCPTT server finds that the called number (13911112222) is registered in the LTE-R network, the MCPTT server sends a standard SIP INVITE message to the IMS core network. In this standard SIP INVITE message, the IMPU consisting of the MCPTT identity (13911112222) of UE2 is carried in both the logical receive (to) header field and the request URI, and the PSI of the MCPTT server is filled in the logical initiator (from) header field. The IMS core network discovers the PSI filled in the logical originator (from) header field with the MCPTT server and thus determines as a standard SIP message compliant with the standard SIP protocol specification, and the IMS core network further determines whether the UE2 is registered in the LTE-R network and the GSM-R network on its own based on the standard SIP INVITE message and performs corresponding processing. The method comprises the following steps: (1.1): when the IMS core determines that the MCPTT identity (13911112222) of UE2 is registered in the LTE-R network and the MSISDN (13911112222) of UE2 is registered in the GSM-R network, the IMS core forwards the standard SIP INVITE message to the GSM-R gateway to request, via the GSM-R gateway, the GSM-R system call for the MCPTT identity of UE2 extracted from the standard SIP INVITE message; (1.2): when the IMS core determines that the MCPTT identity (13911112222) of UE2 is registered in the LTE-R network and the MSISDN (13911112222) of UE2 is not registered in the GSM-R network, the IMS core forwards the standard SIP INVITE message to UE2 in the LTE-R network to call UE 2; (1.3): when the IMS core network determines that the MCPTT identification of UE2 (13911112222) is not registered in the LTE-R network and the MSISDN (13911112222) of UE2 is registered in the GSM-R network (e.g., UE2 leaves the LTE-R network but is not deregistered), the IMS core network forwards the standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the MCPTT identification of UE2 extracted from the standard SIP INVITE request for the GSM-R system call.
(2) When the MCPTT server finds that the called number (13911112222) is not registered in the LTE-R network (UE2 is in the GSM-R system or UE2 is not open, such as UE2 is a single GSM-R terminal), the MCPTT server sends a private SIP INVITE request to the IMS core network. In this private SIP INVITE request, the logical initiator (from) header field is filled with the MCPTT identity of UE1 as the calling party, while the logical recipient (to) header field and the request URI both carry an IMPU consisting of the MCPTT identity (13911112222) of UE 2. The IMS core discovery logic originator (from) header field is filled with the MCPTT identity of UE1 as the calling party and thus determined to be a private SIP message, which requests to know based on the private SIP INVITE that the call is sent to the GSM-R terminal and thus routed to the GSM-R system through the GSM-R gateway for the call.
A second application scenario: the terminal UE2 in the GSM-R network calls the dual-mode terminal UE1 in the LTE-R network. At this time, the UE2 dials the unified number (e.g. 13911113333) of the UE1, the IMS core network receives the point call request sent by the GSM-R gateway, and forms a 3GPP standard point call INVITE message to the MCPTT SERVER, and the subsequent MCPTT server process is performed according to the standard process.
FIG. 4 is a schematic diagram of LTE-R and GSM-R networking according to the present invention.
Based on the above description, the embodiment of the invention also provides a calling device of the LTE-R and GSM-R dual-mode terminal.
Fig. 3 is a structural diagram of a calling device of a dual mode terminal for LTE-R and GSM-R according to the present invention. The apparatus is arranged in an IMS core network.
As shown in fig. 3, the apparatus includes:
a receiving module 301, configured to receive, from a first terminal in an LTE-R network, a first standard SIP INVITE request containing an MCPTT identifier of a second terminal for calling the second terminal, wherein the second terminal is a dual mode terminal of LTE-R and GSM-R, and the MCPTT identifier of the second terminal is configured to be consistent with an MSISDN of the second terminal;
a sending module 302 for sending the first criteria SIP INVITE request to an MCPTT server;
wherein when the MCPTT server determines that the MCPTT identity of the second terminal is not registered in the LTE-R network, it sends to the receiving module 301 a private SIP INVITE request containing the MCPTT identity of the second terminal, filled with the MCPTT identity of the first terminal in the logical originator header field;
wherein the sending module 302 is further configured to forward the private SIP INVITE request to a GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the private SIP INVITE request for the GSM-R system call.
In one embodiment, wherein when the MCPTT server determines that the MCPTT identity of the second terminal is registered in the LTE-R network, a second criterion SIP INVITE request containing the MCPTT identity of the second terminal is sent to the receiving module 301, filling the public service identity, PSI, of the MCPTT server in the logical initiator header field.
In one embodiment, the sending module 302 is further configured to, when it is determined that the MCPTT identifier of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the GSM-R system call for the MCPTT identifier of the second terminal extracted from the second standard SIP INVITE request.
In one embodiment, the sending module 302 is further configured to forward the second criterion SIP INVITE request to the second terminal to call the second terminal when it is determined that the MCPTT identifier of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is not registered in the GSM-R network.
In one embodiment, the sending module 302 is further configured to, when it is determined that the MCPTT identifier of the second terminal is not registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the MCPTT identifier of the second terminal extracted from the second standard SIP INVITE request.
Fig. 5 is a block diagram of a calling device of a dual mode terminal for LTE-R and GSM-R having a memory-processor architecture according to the present invention.
As shown in fig. 5, the calling device for LTE-R and GSM-R dual mode terminals includes: a processor 501 and a memory 502; in which a memory 502 has stored therein an application program executable by the processor 501 for causing the processor 501 to execute the call method of the dual mode LTE-R and GSM-R terminal as described in any of the above.
The memory 502 may be embodied as various storage media such as an Electrically Erasable Programmable Read Only Memory (EEPROM), a Flash memory (Flash memory), and a Programmable Read Only Memory (PROM). The processor 501 may be implemented to include one or more central processors or one or more field programmable gate arrays that integrate one or more central processor cores. In particular, the central processor or central processor core may be implemented as a CPU or MCU.
It should be noted that not all steps and modules in the above flows and structures are necessary, and some steps or modules may be omitted according to actual needs. The execution order of the steps is not fixed and can be adjusted as required. The division of each module is only for convenience of describing adopted functional division, and in actual implementation, one module may be divided into multiple modules, and the functions of multiple modules may also be implemented by the same module, and these modules may be located in the same device or in different devices.
The hardware modules in the various embodiments may be implemented mechanically or electronically. For example, a hardware module may include a specially designed permanent circuit or logic device (e.g., a special purpose processor such as an FPGA or ASIC) for performing specific operations. A hardware module may also include programmable logic devices or circuits (e.g., including a general-purpose processor or other programmable processor) that are temporarily configured by software to perform certain operations. The implementation of the hardware module in a mechanical manner, or in a dedicated permanent circuit, or in a temporarily configured circuit (e.g., configured by software), may be determined based on cost and time considerations.
The present invention also provides a machine-readable storage medium storing instructions for causing a machine to perform a method as described herein. Specifically, a system or an apparatus equipped with a storage medium on which a software program code that realizes the functions of any of the embodiments described above is stored may be provided, and a computer (or a CPU or MPU) of the system or the apparatus is caused to read out and execute the program code stored in the storage medium. Further, part or all of the actual operations may be performed by an operating system or the like operating on the computer by instructions based on the program code. The functions of any of the above-described embodiments may also be implemented by writing the program code read out from the storage medium to a memory provided in an expansion board inserted into the computer or to a memory provided in an expansion unit connected to the computer, and then causing a CPU or the like mounted on the expansion board or the expansion unit to perform part or all of the actual operations based on the instructions of the program code.
Examples of the storage medium for supplying the program code include floppy disks, hard disks, magneto-optical disks, optical disks (e.g., CD-ROMs, CD-R, CD-RWs, DVD-ROMs, DVD-RAMs, DVD-RWs, DVD + RWs), magnetic tapes, nonvolatile memory cards, and ROMs. Alternatively, the program code may be downloaded from a server computer or the cloud by a communication network.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative. For the sake of simplicity, the drawings are only schematic representations of the parts relevant to the invention, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "a" does not mean that the number of the relevant portions of the present invention is limited to "only one", and "a" does not mean that the number of the relevant portions of the present invention "more than one" is excluded. In this document, "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A calling method of an LTE-R and GSM-R dual-mode terminal is characterized by comprising the following steps:
a first terminal in an LTE-R network sends a first standard Session Initiation Protocol (SIP) invitation SIP INVITE request containing a mission critical push-to-talk (MCPTT) identification of a second terminal to an IP Multimedia Subsystem (IMS) core network so as to call the second terminal, wherein the second terminal is a dual-mode terminal of LTE-R and GSM-R, and the MCPTT identification of the second terminal is configured to be consistent with a mobile station identification number (MSISDN) of the second terminal;
the IMS core network sends the first standard SIP INVITE request to an MCPTT server;
when the MCPTT server determines that the MCPTT identification of the second terminal is not registered in the LTE-R network, sending a private SIP INVITE request which contains the MCPTT identification of the second terminal and is filled with the MCPTT identification of the first terminal in a logic initiator header domain to an IMS core network;
the IMS core network forwards the private SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the GSM-R system call for the MCPTT identity of the second terminal extracted from the private sip invite request.
2. The method for calling the LTE-R and GSM-R dual mode terminal as claimed in claim 1, further comprising:
and when the MCPTT server determines that the MCPTT identification of the second terminal is registered in the LTE-R network, sending a second standard SIP INVITE request which contains the MCPTT identification of the second terminal and is filled with the Public Service Identification (PSI) of the MCPTT server in a logic initiator header domain to an IMS core network.
3. The method for calling the LTE-R and GSM-R dual mode terminal as claimed in claim 2, further comprising:
when the IMS core network determines that the MCPTT identity of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the second standard SIP INVITE request for a GSM-R system call.
4. The method for calling the LTE-R and GSM-R dual mode terminal as claimed in claim 2, further comprising:
when the IMS core network determines that the MCPTT identity of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is not registered in the GSM-R network, forwarding the second criteria SIP INVITE request to the second terminal to call the second terminal.
5. The method for calling the LTE-R and GSM-R dual mode terminal as claimed in claim 2, further comprising:
when the IMS core network determines that the MCPTT identity of the second terminal is not registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to the GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the second standard SIP INVITE request for a GSM-R system call.
6. A calling device for a dual mode terminal of LTE-R and GSM-R, the device being disposed in an IP multimedia subsystem, IMS, core network, the device comprising:
a receiving module, configured to receive, from a first terminal in an LTE-R network, a first standard session initiation protocol invite SIP INVITE request containing a mission critical push-to-talk MCPTT identifier of the second terminal for calling the second terminal, wherein the second terminal is a dual mode terminal of LTE-R and GSM-R, and the MCPTT identifier of the second terminal is configured to be consistent with a mobile station identification number, MSISDN, of the second terminal;
a sending module for sending the first criteria SIP INVITE request to an MCPTT server;
wherein when the MCPTT server determines that the MCPTT identification of the second terminal is not registered in the LTE-R network, sending a private SIP INVITE request containing the MCPTT identification of the second terminal, filled with the MCPTT identification of the first terminal in a logical initiator header field, to the receiving module;
wherein the sending module is further configured to forward the private SIP INVITE request to a GSM-R gateway to request, via the GSM-R gateway, the MCPTT identity of the second terminal extracted from the private SIP INVITE request for the GSM-R system call.
7. Calling device for LTE-R and GSM-R dual mode terminals according to claim 6,
wherein when the MCPTT server determines that the MCPTT identification of the second terminal is registered in the LTE-R network, sending a second standard SIP INVITE request containing the MCPTT identification of the second terminal and filling Public Service Identification (PSI) of the MCPTT server in a logic initiator header domain to the receiving module.
8. Calling device for a dual mode LTE-R and GSM-R terminal according to claim 7,
wherein the sending module is further configured to, when it is determined that the MCPTT identifier of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to a GSM-R gateway to request, via the GSM-R gateway, a GSM-R system call for the MCPTT identifier of the second terminal extracted from the second standard SIP INVITE request.
9. Calling device for a dual mode LTE-R and GSM-R terminal according to claim 7,
wherein the sending module is further configured to forward the second criteria SIP INVITE request to the second terminal to call the second terminal when it is determined that the MCPTT identification of the second terminal is registered in the LTE-R network and the MSISDN of the second terminal is not registered in the GSM-R network.
10. Calling device for a dual mode LTE-R and GSM-R terminal according to claim 7,
wherein the sending module is further configured to, when it is determined that the MCPTT identifier of the second terminal is not registered in the LTE-R network and the MSISDN of the second terminal is registered in the GSM-R network, forward the second standard SIP INVITE request to a GSM-R gateway to request, via the GSM-R gateway, a GSM-R system call for the MCPTT identifier of the second terminal extracted from the second standard SIP INVITE request.
11. A calling device of an LTE-R and GSM-R dual-mode terminal is characterized by comprising a processor and a memory;
the memory stores an application program executable by the processor for causing the processor to perform a call method of an LTE-R and GSM-R dual mode terminal as claimed in any one of claims 1 to 5.
12. A computer-readable storage medium having stored therein computer-readable instructions for executing the method for calling of a dual mode LTE-R and GSM-R terminal according to any one of claims 1 to 5.
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