KR102076766B1 - Method and apparatus for maintaining active status of mobile phone - Google Patents

Abstract

The present invention relates to a method and apparatus for maintaining terminal activation. The disclosed terminal activation maintaining method includes periodically counting whether a preset signaling time has elapsed from the time when a message indicating a reception state of a called terminal to an originating call is transmitted to the calling terminal, and periodically transmitting at the signaling time by counting. And transmitting an activation maintaining message for maintaining the activation state of the terminal to the calling terminal. Accordingly, since the time required for setting up the dedicated GBR bearer for the call is minimized by allowing the calling terminal to remain in the active state without entering the idle state, the initial silence that may occur from the position of the called terminal during the bearer setting time is minimized. Time also has the advantage of minimizing.

Description

Method and device for maintaining terminal activation {METHOD AND APPARATUS FOR MAINTAINING ACTIVE STATUS OF MOBILE PHONE}

The present invention relates to a method and apparatus for maintaining terminal activation. More particularly, the present invention relates to a terminal activation maintaining method and apparatus for maintaining an activation state of an originating terminal generating a call.

As is well known, 3GPP Release 8 describes an Evolved Packet Core (EPC), which is a network architecture, as one of mobile communication systems. EPC is a collection of network nodes for 3GPP LTE system. EPC evolves the core network of the existing 3GPP system architecture to support Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN), which is an evolved RAN, and also improves the efficiency of packet networks. In order to simplify the network node, it has an efficient network structure. A wireless communication system including an EPC and an E-UTRAN may be referred to as an EPS (Evolved Packet System), and an LTE mobile communication system currently serving in Korea corresponds to this.

In the early stages of building such an LTE mobile communication system, a mixed communication environment with a legacy network such as a wideband code division multiple access (WCDMA) mobile communication system appears, and in such a communication environment, a legacy network such as a WCDMA network can be connected to an LTE network. A dual mode mobile communication terminal device which can be connected may be operated. In addition, in the early days of the LTE mobile communication service, a WCDMA mobile communication system was used to provide a voice call service to a dual mode mobile communication terminal, and an LTE mobile communication system was used to provide a data communication service.

In contrast, VoLTE service uses LTE mobile communication system for data communication as well as voice communication. This VoLTE service is also called a high definition voice service. According to the VoLTE service, it is possible to provide a clearer HD voice call service than conventional voice calls, and users can share contents such as maps, music, news, and photos while showing the screen in real time with the other party during the call. .

However, since the service area of the LTE network is currently limited, there is a problem that continuity of voice call is not guaranteed in an area where the radio environment is poor, such as an area beyond the restricted area or a service cell border area. In order to solve this problem, it is a trend to provide voice call continuity in conjunction with legacy networks. At this time, in order to provide continuity of calls when entering the LTE weak field during VoLTE calls, a packet switched handover technique is a packet switched handover technique for handing over voice traffic to a packet switched network of a legacy network. Single Radio Voice Call Continuity (SRVCC) is a technology that enables handover of voice traffic over a network switched network.

A process of processing a VoLTE call for a VoLTE service according to the prior art is as follows.

First, when a VoLTE call is generated at a calling mobile terminal, paging is performed in units of a tracking area (TA), and the called mobile terminal is capable of receiving a call. Message) and a ring signal is generated when a 180 ringing message arrives at the calling mobile terminal.

In the calling mobile communication terminal device, the ring signal is generated by the background execution.If the called mobile communication terminal receives the call late, the calling mobile communication terminal device saves power after a certain time. Enters an idle state for releasing radio resources. The time at which the originating mobile communication terminal enters the idle state during the generation of the ring signal is set in the eNodeB.

Then, when the called mobile communication terminal receives the call, 200 OK arrives at the calling mobile communication terminal. Then, the originating mobile communication terminal sets the EPS bearer after being activated from the idle state to the active state. At this time, since the VoLTE call uses a dedicated GBR (Guaranteed Bit Rate) bearer capable of guaranteeing bandwidth, a process of configuring a dedicated GBR bearer as well as a default bearer is performed.

However, according to the related art, when the calling mobile communication terminal enters the idle state after the call is released, the radio resource such as the EPS bearer is released. It takes quite a long time, and during this bearer setup time, there is a problem that initial muting occurs for a quite long time from the perspective of the called mobile communication terminal.

Republic of Korea Patent Publication No. 10-2008-0032278, published April 15, 2008.

According to an embodiment of the present invention, by periodically sending an activation maintenance message to the calling mobile terminal, the calling mobile terminal may remain in an active state without entering the idle state, thereby establishing a dedicated GBR bearer for the call. Shorten the time until

The problem to be solved of the present invention is not limited to the above-mentioned thing, and another problem to be solved which is not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a terminal activation maintaining method, including: periodically counting whether a preset signaling time has elapsed from a time when a message indicating a reception state of a called terminal to an originating call is transmitted to an originating terminal, The method may include transmitting an activation maintenance message to the calling terminal to maintain the activation state of the calling terminal when the signaling time elapses.

According to another aspect of the present invention, there is provided a terminal activation maintaining apparatus, comprising: a time counting unit for periodically counting whether a preset signaling time has elapsed from a time when a message indicating a reception state of a called terminal to an originating call is transmitted to the calling terminal; According to the count may include a message transmitter for transmitting an activation maintenance message to the calling terminal to maintain the activation state of the calling terminal when the signaling time elapses.

According to an embodiment of the present invention, by periodically sending an activation maintenance message to the calling mobile terminal, the calling mobile terminal may remain in an active state without entering the idle state, thereby establishing a dedicated GBR bearer for the call. Minimize the time required to do so.

Therefore, there is also an effect of minimizing the time of initial silence that may occur from the position of the called-party mobile communication terminal during the bearer setup time.

1 is a diagram illustrating a network configuration of a mobile communication service system capable of employing a terminal activation maintaining apparatus and method according to an embodiment of the present invention.
2 is a block diagram of a terminal activation maintaining apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating a terminal activation maintaining method according to an embodiment of the present invention.
4 is a flowchart illustrating a process of processing a VoLTE call in a mobile communication service system employing a terminal activation maintaining apparatus according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the embodiments of the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the contents throughout the specification.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a diagram illustrating a network configuration of a mobile communication service system capable of employing an apparatus and method for determining call processing order according to an embodiment of the present invention. Although FIG. 1 illustrates a case where a WCDMA mobile communication network is operated as a legacy network, the legacy network is not limited thereto. For example, other asynchronous mobile communication networks such as Global System for Mobile (GSM) and the like or other synchronous mobile communication networks such as CDMA2000 may be mixed with the LTE mobile communication network.

According to the mobile communication service system shown in FIG. 1, a VoLTE service can be provided for a dual mode mobile equipment 300 which can be connected to an LTE network and can also be connected to a legacy network such as a WCDMA network. Can be.

In the mobile communication terminal 300, the service area 111 of the eNodeB 110 serving as a base station constituting an LTE mobile communication network serves as a base station constituting a WCDMA mobile communication network. It may be operated in the service overlap area included in 211. For example, the mobile communication terminal 300 may be implemented in various forms such as a smart phone, a notepad, a tablet computer, and the like.

eNodeB 110, MME 120, Home Subscriber Server (HSS) 130, Serving Gateway (SGW) 140, Packet Data Network Gateway (PGW) 150, MSC Server 160, PCR & Policy Charging Rule Function) 170 may configure an LTE mobile communication network.

The eNodeB 110 performs a role of a base station to ensure mobility by communicating with the mobile communication terminal (300). The eNodeB 110 may include radio bearer control, radio admission control, connection mobility control, dynamic resource allocation to the mobile communication terminal 300, and the like. The same radio resource management function is performed. In addition, IP header compression and encryption of user data streams, routing of user plane data to the SGW 140, scheduling and transmission of paging messages, scheduling and transmission of broadcast information, Perform measurement and measurement report setup for mobility and scheduling.

The MME 120 is responsible for signal control between the eNodeB 110 and the SGW 140, and determines routing of transmission data of the mobile communication terminal 300. The MME 120 performs paging message distribution to the eNodeB 110, Non Access Spectrum (NAS) signaling, in-network handover control, and tracking area list management. In addition, the MME 120 performs the selection of the SGW 140 and the PGW 150, the selection and modification of the MME 120 for handover, and the terminal authentication. The MME 120 processes a control signal when there is a join request or a radio bearer setup request from the mobile communication terminal 300 or another network node such as the PGW 150 or the SGW 140. It is responsible for various functions of the control plane, and receives subscriber profile information, authentication, and location data from the HSS 130 to set up and mobility EPS bearers or IP tunnels. It performs functions such as mobility management.

The HSS 130 is a network node including a database that includes subscriber information for an LTE mobile communication network, and stores subscriber profile information, authentication, and location related data.

The SGW 140 is a user plane node that performs session control to process payload traffic according to a set session. It interworks with the eNodeB 110 through the S1-U interface, supports handoff within 3GPP, sets up the EPS bearer with the PGW 150, and delivers a packet data unit (PDU) using tunneling. The SGW 140 selects the PGW 150 based on the subscriber profile. In case of an inbound roaming call, the SGW 140 generates charging data for mutual settlement with the PGW of the home network.

The PGW 150 is a user plane node that allocates an IP of the mobile communication terminal 300 and performs session control interworking with an external Internet network and a non-3GPP network. Maintains routing information with the SGW 140 and the external network for packet service, and performs tunneling and IP routing functions. In addition, it delivers the PDU to the SGW 140 and the external network. The PGW 150 performs charging processing when the local call is made.

The MSC server 160 provides a session data protocol for voice and video for an additional function by the IP Multimedia Subsystem (IMS) 400.

The PCRF 170 provides dynamic QoS and charging rules according to the service data flow to perform communication policy and charging processing in the communication network.

NodeB 210, RNC 220, SGSN 230, Mobile Switching Center (MSC) 240, Home Location Register (HLR) 250, Cellular Gateway Switch (CGS) 260, Gateway General packet radio service support node) 270 may configure a WCDMA mobile communication network. Here, NodeB 210 and RNC 220 correspond to a radio access network area, MSC 240 and CGS 260 correspond to a circuit switched core network, and SGSN 230 and GGSN 270 exchange packets. Corresponds to the core network.

The NodeB 210 secures a frequency used for connection with the mobile communication terminal devices 300 and ensures stable connection with the mobile communication terminal devices 300.

The RNC 220 controls several NodeBs 210, allocates communication resources to each NodeB 210, and performs functions such as handover.

The SGSN 230 is connected to several RNCs 220 to perform mobility and packet session management of the mobile communication terminal 300, perform IP routing, and register location of the mobile communication terminal 300. You can do the same.

The GGSN 270 directly connects to the IP network and serves as a gateway for connecting the PS domain of the IP network and the WCDMA network, and maintains routing information between the SGSN 230 and the external network, and tunneling and IP routing. Perform the function.

The MSC 240 stores visitor location information and receives switching profile information, authentication and location related data from the HLR 250 to perform switching control for voice communication.

The CGS 260 serves as a gateway connecting the WCDMA mobile communication network and the general communication network to enable communication with other communication systems connected to the general communication network, and serves as a gateway between the MSC 240 and the IMS 400.

Call Session Control Function (CSCF) 410, Home Subscriber Server (HSS) 420, Media Gateway (430), Media Gateway Control Function (MGCF) 440, Application Server (AS) 450, etc. May configure an IMS (IP Multimedia Subsystem) 400.

The terminal activation maintaining apparatus (reference numeral 500 of FIG. 2) according to an embodiment of the present invention may be interworked with the AS 450 in a state of being mounted on the AS 450 or separately installed among the nodes constituting the IMS. Alternatively, the terminal activation maintaining apparatus (reference numeral 500 of FIG. 2) may be interworked with the CSCF 410 in a state where it is mounted in the CSCF 410 or separately installed. This means that the terminal activation maintaining apparatus (reference numeral 500 of FIG. 2) can be interlocked with the exchange apparatus in a state where it is mounted on the exchange apparatus or separately installed. Hereinafter, a case in which the terminal activation maintaining apparatus (reference numeral 500 of FIG. 2) is mounted on the AS 450 will be described as an example.

The CSCF 410 is an infrastructure system that performs call processing and performs basic functions for controlling a session based on SIP (Session Initiation Protocol). The CSCF 410 handles subscriber registration, authentication, billing, triggering and routing for each service, caller location query, and compression and decompression of SIP messages. The CSCF 410 can be divided into Proxy_CSCF, Interogating-CSCF, and Serving-CSCF.

The HSS 420 is a network node that includes a database containing subscriber information for WCDMA mobile networks and / or LTE mobile communication networks, and stores subscriber profile information, authentication, and location related data.

The MGW 430 is a gateway serving as a gateway between the MGCF 440 and the CGS 260, and converts signaling and media for interworking between the LTE mobile communication network connected to the CSCF 410 and the WCDMA mobile communication network.

The MGCF 440 supports conversion of signaling between the SIP and the ISDN User Part (ISP) used in the circuit switched network, and controls the MGW 430.

The AS 450 is a server that provides a telephony service, and provides additional services such as caller ID service, incoming / outgoing call forwarding, call forwarding, and the like. The AS 450 may be equipped with a terminal activation maintaining apparatus (500 of FIG. 2) according to an embodiment of the present invention. In this case, the AS 450 periodically counts whether a predetermined signaling time has elapsed from the time when the message indicating the reception state of the called-party mobile communication terminal device for the outgoing call is transmitted to the calling-party mobile communication terminal device, Accordingly, when the signaling time elapses, an activation maintenance message for maintaining the activation state of the calling mobile terminal may be transmitted to the calling mobile terminal.

2 is a block diagram of a terminal activation maintaining apparatus according to an embodiment of the present invention.

As described above, the terminal activation maintaining apparatus 500 according to the embodiment includes a time counting unit 510 and a message transmitting unit 520.

The time counting unit 510 periodically counts whether the preset signaling time has elapsed from the time when the message indicating the reception possible state of the called-party mobile communication terminal device for the outgoing call is transmitted to the calling-party mobile communication terminal device.

The message transmitter 520 transmits an activation maintaining message for maintaining the activation state of the calling mobile terminal to the calling mobile terminal when the signaling time elapses according to the count of the time counting unit 510.

3 is a flowchart illustrating a terminal activation maintaining method according to an embodiment of the present invention.

As described above, the terminal activation maintaining method according to the embodiment includes whether a preset signaling time has elapsed from the time when the message indicating the reception state of the called-party mobile communication terminal device for the outgoing call is transmitted to the calling-party mobile communication terminal device. And counting periodically (S610).

The method further includes transmitting an activation maintenance message to the calling mobile terminal to maintain the activation state of the calling mobile terminal when the signaling time elapses according to the count (S620 and S630).

4 is a flowchart illustrating a process of processing a VoLTE call in a mobile communication service system employing a terminal activation maintaining apparatus according to an embodiment of the present invention.

Hereinafter, an example in which the terminal activation maintaining apparatus 500 according to an embodiment of the present invention maintains an activated state of the mobile communication terminal 300 during a service process by the mobile communication service system will be described with reference to FIGS. 1 to 4. Let's look at it. In the following description, it will be assumed that the mobile communication terminal 300 shown in FIG. 1 is an outgoing mobile communication terminal and that the AS 450 is an outgoing AS.

First, when a VoLTE call is generated in the originating mobile communication terminal 300, a SIP invite message is transmitted to the originating AS 450 (701).

Then, the originating AS 450 transmits a diameter message for inquiring exchange information of the terminating mobile communication terminal device to the HSS 420 (703), and exchange information of the terminating mobile communication terminal device from the HSS 420. Receive a diameter message that includes (705).

The originating AS 450 requests paging by sending a SIP invite message to the called AS based on the obtained exchange information of the called MS.

Then, the incoming AS 450 performs paging for transmitting the SIP invite message in units of a tracking area (TA) (709).

The incoming mobile communication terminal receiving the SIP invite message transmits a SIP 180 ringing message indicating that it is in a state capable of receiving a call (711), and the SIP ringing message passes through the originating AS 450. The outgoing mobile communication terminal 300 is transmitted (713, 715).

When the SIP 180 ringing message arrives, a ring signal is generated in the outgoing mobile communication terminal 300, and the ring signal continues after the background execution.

At this time, according to the related art, when the incoming mobile communication terminal receives a late call, the outgoing mobile communication terminal 300 enters an idle state for releasing radio resources for power saving or the like after a predetermined time elapses. As such, the time at which the outgoing mobile communication terminal 300 enters the idle state during the generation of the ring signal is set in the eNodeB 110.

However, the terminal activation maintaining apparatus 500 according to the present invention periodically transmits an activation maintenance message to the called mobile communication terminal 300 to maintain the activated state without the incoming mobile communication terminal 300 entering the idle state. Do it.

To this end, the time counting unit 510 of the terminal activation maintaining apparatus 500 mounted on the originating AS 450 receives a message indicating a reception state of the called mobile communication terminal for the originating call, that is, a SIP 180 ringing message. It is periodically counted whether or not the preset signaling time has elapsed from the time point at which it was transmitted to the outgoing mobile communication terminal 300 (717, 721).

In addition, the message transmission unit 520 of the terminal activation maintaining apparatus 500 periodically generates an activation maintenance message for maintaining the activation state of the originating mobile communication terminal 300 at the signaling time by the coefficient of the time counting unit 510. The transmission is transmitted to the calling mobile communication terminal 300 (719, 723).

For example, the message transmitter 520 may transmit the SIP ringing message to the originating mobile communication terminal 300 using the SIP ringing message. Here, the reason for using the SIP ringing message is to have no influence other than to cause the ring signal to be generated in the outgoing mobile communication terminal (300).

In addition, the signaling time for transmitting the SIP ringing message, i.e., the period, is set to be shorter than the time set in the eNodeB 110 in order for the originating mobile communication terminal 300 to switch from the active state to the idle state. The terminal device 300 continuously maintains the active state without entering the idle state.

Thereafter, when the user of the called mobile communication terminal receives the call, the SIP 200 OK message is transmitted to the calling mobile communication terminal 300 through the called AS and the calling AS 450 (725, 727, 729).

Then, the originating mobile communication terminal 300 establishes a dedicated GBR bearer for VoLTE service (731). At this time, according to the present invention, since the originating mobile communication terminal 300 maintains the active state, the default bearer is already set, and if only the dedicated GBR bearer is set, all preparation for the VoLTE service is completed. Therefore, the bearer setup time is greatly shortened compared with the prior art, in which the basic bearer and the dedicated GBR bearer should be set after the transition from the idle state to the active state. Therefore, the time of initial silence that may occur from the standpoint of the incoming mobile communication terminal 300 during the bearer setup time is also minimized.

Combinations of each block of the block diagrams and each step of the flowcharts attached herein may be performed by computer program instructions. These computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment such that the instructions executed through the processor of the computer or other programmable data processing equipment may be used in each block or flowchart of the block diagram. It will create means for performing the functions described in each step. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. The instructions stored therein may also produce an article of manufacture containing instruction means for performing the functions described in each block or flowchart of each step of the block diagram. Computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to create a computer or other programmable data. Instructions that perform processing equipment may also provide steps for performing the functions described in each block of the block diagram and in each step of the flowchart.

In addition, each block or step may represent a portion of a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s). It should also be noted that in some alternative embodiments, the functions noted in the blocks or steps may occur out of order. For example, the two blocks or steps shown in succession may in fact be executed substantially concurrently, or the blocks or steps may sometimes be performed in the reverse order, depending on the functionality involved.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto shall be construed as being included in the scope of the present invention.

According to an embodiment of the present invention, by periodically sending an activation maintenance message to the calling terminal so that the calling terminal stays active without entering the idle state, the time required to set up a dedicated GBR bearer for the call is minimized. do. Therefore, the time of initial silence that may occur in the position of the called terminal during the bearer setup time is also minimized.

The present invention can be used in various mobile communication service systems including LTE mobile communication network.

410: CSCF 450: AS
500: terminal activation maintaining device
510: time counting unit 520: message transmitting unit

Claims (6)

The preset signaling time has elapsed from the time when the terminal activation maintaining apparatus mounted in the application server (AS) transmits a message indicating the reception state of the called terminal to the calling terminal in response to the calling call of the calling terminal. Counting periodically whether
And transmitting, by the terminal activation maintaining apparatus, an activation maintenance message for maintaining the activation state of the calling terminal to the calling terminal when the signaling time elapses according to the count.
How to maintain terminal activation. The method of claim 1,
The signaling time is shorter than a time set for the originating terminal to switch to an idle state by releasing radio resources in an active state.
How to maintain terminal activation. The method of claim 1,
The keep alive message is a 180 ringing message.
How to maintain terminal activation. In the terminal activation maintenance device mounted on an application server (Application Server, AS),
A time counting unit for periodically counting whether a preset signaling time has elapsed from the time when the message indicating the reception state of the called terminal to the originating call is transmitted to the calling terminal;
And a message transmitter configured to transmit an activation maintenance message to the originating terminal to maintain an activation state of the originating terminal when the signaling time elapses according to the coefficient.
Terminal activation maintenance device. The method of claim 4, wherein
The signaling time is shorter than a time set for the originating terminal to switch to an idle state by releasing radio resources in an active state.
Terminal activation maintenance device. The method of claim 4, wherein
The keep alive message is a 180 ringing message.
Terminal activation maintenance device.

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