KR20150028570A - Method and apparatus for controlling user equipment for additional service - Google Patents

Abstract

A method for controlling a user equipment for an additional service comprises the following steps: checking whether a terminating terminal is a preset target terminal supposed to receive a specific additional service when an originating terminal is executing a local ring back tone according to a local response of the terminating terminal to a connection request; requesting for allocation of a wireless resource for silent announcement to the originating terminal when the terminating terminal is the target terminal; and transmitting a dummy packet to the originating terminal to maintain a session of the allocated wireless resource.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a terminal control method for an additional service,

The present invention relates to a technique for controlling a communication terminal for mobile communication, and more particularly, to a terminal control method for an additional service suitable for smoothly providing a specific supplementary service related to a ring back tone to a calling terminal without deteriorating the perceived quality, And the device.

As is well known, the ALL-IP network can provide interworking services with an Internet network using IP (Internet Protocol), and can provide solutions suitable for integrated multimedia services including voice, data, and real- ), The cost reduction effect can be obtained through the packet transmission.

As a core technology for providing a new service in the All-IP based communication environment, an IP Multimedia Subsystem (hereinafter referred to as " IP Multimedia Subsystem ") defined as a core technology for providing various services to subscribers based on the ALL- Quot; IMS "). Such an IMS can provide IP services over a packet network regardless of the access network format, and can provide services that require transmission of multimedia data such as one-to-one video calls as well as general call services.

In 3GPP Release 8, EPC (Evolved Packet Core), which is a network architecture, is described as one of mobile communication systems. EPC is a set of network nodes for 3GPP LTE (Long Term Evolution) to be.

This 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, It has an efficient network structure in which the network node is simplified. A wireless communication system including an EPC and an E-UTRAN may be referred to as an evolved packet system (EPS), and an LTE mobile communication system currently in service in Korea can be regarded as such.

Meanwhile, a processing procedure of the VoLTE call for VoLTE service according to the related art will be described as follows.

First, when a VoLTE call is generated in a calling terminal, paging is performed in units of a TA (Tracking Area). The called terminal generates a SIP 180 ringing message indicating that a telephone can be received, To the calling terminal side, and the calling terminal itself generates a ring signal when receiving the SIP 180 ringing message. That is, the calling terminal itself generates a ring signal through background execution.

At this time, if there is no packet reception from the called party for a predetermined time (for example, 10 seconds), the mobile communication network releases radio resources to prevent unnecessary waste of resources, and accordingly, the calling terminal operates in an active mode And is switched to a preservation mode (or idle mode) of radio resource release. That is, although the ring signal is generated at the calling terminal, the radio resource is maintained in the released state.

On the other hand, when each subscriber does not receive a call from the called party for a predetermined period of time, the subscriber may be selectively provided with a specific supplementary service related to the ringback tone (e.g., voice mail service, calling number memo plus service, etc.).

Therefore, when the calling terminal is the target terminal supporting the specific supplementary service, when the SIP 200 OK message for connection from the supplementary service node is received on the server side, after the process of allocating the radio resource to the calling terminal, And transmits the signaling packets for the call connection to the calling terminal.

At this time, a certain node in the mobile communication network, for example, the signal processing node (SGW), buffers the packets transmitted from the additional service node while the process for allocating the radio resources proceeds (i.e., the calling terminal transitions to the active node) . Here, the buffer size at the signal processing node SGW is very limited, and it can not distinguish signaling packets for call connection such as SIP 18x / 200 OK.

Generally, since the signaling packet and the media packet are transmitted to the terminal differently, the signaling packet arrives relatively later than the signal processing node (SGW) in comparison with the media packet. This network environment and buffer size There is a problem that a signaling packet arriving late to the signal processing node SGW is lost at the signal processing node.

Therefore, the conventional method has a problem that initial silence occurs due to the loss of signaling packets at the signal processing node, and this initial silence problem is one factor that deteriorates the perceived quality of subscribers.

Korean Registered Patent No. 10-0741194, published on July 19, 2007. Korean Patent Registration No. 10-0999654, Publication Date December 08, 2010.

When a ringing signal is being generated in a state where radio resources of a calling terminal that has called a called terminal supporting a specific supplementary service are released, radio resources for silence announcement broadcasting to the calling terminal are allocated, A silent announcement broadcast can be performed by transmitting a dummy packet to a calling terminal so that a session of the wireless resource can be maintained.

The problems to be solved by the present invention are not limited to those mentioned above, and another problem to be solved by the present invention can be clearly understood by those skilled in the art from the following description will be.

According to one aspect of the present invention, in a case where the calling terminal is executing a local ring back tone in response to a local response from a called terminal in response to a connection request, a process of checking whether the called terminal is a target terminal of a predetermined specific supplementary service support Requesting allocation of a radio resource for silence announcement broadcast to the calling terminal when the terminal is the target terminal; and transmitting a dummy packet to the calling terminal to maintain a session of the allocated radio resource And provides a terminal control method for additional services.

According to another aspect of the present invention, a connection request of a calling terminal is transmitted to a called terminal, and a message for execution of a local ring back tone is transmitted to the calling terminal side according to a local response from the called terminal for the connection request A resource manager for requesting allocation of a radio resource to the calling terminal when the called terminal is the target terminal, and a resource manager for assigning a radio resource allocated to the called terminal, And a dummy packet generator for transmitting a dummy packet to the calling terminal for maintaining a session of the terminal.

In the present invention, when a calling terminal that has released a radio resource is generating a ring signal, a radio resource for silence announcement broadcasting is allocated to the calling terminal, and then a session of the allocated radio resource is maintained. , It is possible to prevent the signaling packet from being lost in the signal processing node SGW due to the network environment and the buffer size at the time of execution of the specific supplementary service related to the ring back tone , Thereby effectively preventing the occurrence of the initial silence due to the loss of the signaling packet.

FIG. 1 is a network configuration diagram of a mobile communication system to which a terminal control scheme according to the present invention can be applied,
FIG. 2 is a block diagram of a node apparatus suitable for applying a terminal control scheme according to the present invention;
3 is a block diagram of a terminal control apparatus for an additional service according to the present invention;
4 is a flowchart illustrating a call processing process including a silent announcement broadcast play service provided according to the present invention when a connection request to a called terminal is generated;
FIG. 5 is a flowchart illustrating a main process of providing a calling terminal including a silent announcement broadcast play service to a calling terminal according to the present invention;
FIG. 6 is a schematic view for explaining a case where an additional service node providing a specific additional service to an originating terminal exists outside the intelligent network according to the present invention; FIG.

First, the advantages and features of the present invention, and how to accomplish them, will be clarified with reference to the embodiments to be described in detail with reference to the accompanying drawings. While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. It is to be understood that the following terms are defined in consideration of the functions of the present invention, and may be changed according to intentions or customs of a user, an operator, and the like. Therefore, the definition should be based on the technical idea described throughout this specification.

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

FIG. 1 is a network configuration diagram of a mobile communication system to which a UE control technique according to the present invention is applicable. Referring to FIG. 1, UEs 110/1 and 110/2 and base stations eNodeB 120/1 and 120 / 2, a mobile communication network 130, an IMS (IP Multimedia Subsystem) 140, and an IMS (IP Multimedia Subsystem) 150.

1, when the communication terminal UE-A 110/1 is a calling terminal, the communication terminal UE-B 110/2 can be defined as a called terminal or vice versa, Each of the communication terminals 110/1 and 110/2 provides a packet-based voice call service, a packet-based video call service, a packet-based data communication service, etc. from each of the corresponding base stations 120/1 and 120/2 For example, an LTE subscriber terminal, a VoLTE subscriber terminal supporting HD voice, and the like. Between each of the communication terminals UE-A and UE-B and each of the base stations 120/1 and 120/2, a cell or a radio unit including a mobile communication antenna, a mobile communication repeater, RU: radio unit) can be installed.

Assuming that the communication terminal 110/2 that received the connection request from the communication terminal 110/1 is the called terminal supporting the predetermined additional service, the communication terminal 110/1 is in accordance with the present invention (Changed) from the preservation mode of the radio resource release when the radio resource for silence announcement is allocated, and can be switched (changed) from the activated application mode to the active mode by the incoming application service node 153 in the second intelligent network 150 And a silence announcement broadcast (play) service using a provided dummy packet. Specific service processes thereof will be described later in detail with reference to FIG. 3 to FIG. Here, the predetermined specific additional service means a ringback tone related additional service, which may mean a voice mailbox service, a calling number memo plus service, or the like.

Next, when the base station 120/1 is the base station of the calling party (for the calling terminal), the base station 120/2 can be defined as the base station of the called party (for the called terminal) or vice versa, The base stations 120/1 and 120/2 may be defined as a base station, base station equipment, or base station device for supporting next generation technologies and services such as LTE (or VoLTE). Radio bearer control A radio resource management function such as radio admission control, connection mobility control, dynamic resource allocation to a communication terminal (or a user terminal) .

In addition, each of the base stations 120/1 and 120/2 can perform IP header compression and encryption of user data streams, routing of user plane data to the signal processing node 134, scheduling of paging messages Scheduling and transmission of broadcast and broadcast information, and measurement and measurement reporting for mobility and scheduling.

Although only two base stations are illustrated in FIG. 1 for the sake of convenience and ease of explanation, it is also possible to provide communication services (for example, voice call service, video call service, group video A plurality of multimedia services including a call service, a supplementary information service, and the like can be managed (controlled) by the mobility management node 132 in the mobile communication network 130, and dozens of base stations can be managed in one TA (Tracking Area) Or a group).

The mobile communication network 130 may be, for example, an LTE mobile communication system (or LTE network), and includes a mobility management node (MME) 132, a signal processing node A Serving Gateway 134, a packet processing node (e.g., a PGW: PDN Gateway) 136, and a policy management node (e.g., PCRF: Policy and Charging Rule Function (PCRF) 138). Here, the SGW 134 and the PGW 136 may be defined as separate user plane nodes or integrated user plane nodes, and each node (e.g., MME, SGW, PGW, PCRF) constituting the mobile communication network 130 Etc.) may be partially or selectively incorporated or replaced with other components depending on the network environment of the mobile communication network system and the like.

The mobility management node 132 may be a node that manages the mobility of the communication terminal through the signal control between the base station and the signal processing node 134. The mobility management node 132 may be a session management server, Paging, subscriber authentication, and so on. In other words, each base station can receive a control plane, such as processing a control signal when there is a request for association from a communication terminal or another network node, such as signal processing node 134 or packet processing node 136, and control plane, and receives subscriber profile information, authentication and location related data from an HLR (Home Location Register) (not shown), and sets up an EPS bearer or an IP tunnel and performs mobility management (mobility management) and the like. Here, the HLR can store and manage subscriber profile information, authentication, location-related data of the terminal, and the like.

The signal processing node 134 processes the payload traffic according to a predetermined session based on a communication policy in the network provided from the policy management node 138 via a packet processing node 136 A user plane node which performs session control and the like and interworks with a base station through an S1-U interface, supports handoff in an LTE mobile communication system and a 3GPP network, And an ESP bearer (Evolved Packet System bearer) 136 and a PDU (Packet Data Unit) using tunneling.

Next, the packet processing node 136 allocates the IP of the terminal apparatus according to the communication and charging policy provided from the policy management node 138, and allocates the IP of the terminal apparatus to the user plane Node, it maintains routing information with the signal processing node 134 and the external network for packet service, provides tunneling and IP routing functions through organic linkage with the intelligent network, and provides the functions of the signal processing node 134 and the external network PDU to the signal processing node 134, and may provide a function of transmitting policy priority information provided from the policy management node 138 to the signal processing node 134.

The policy management node 138 also provides dynamic QoS and billing rules according to the service data flow and manages and processes communication policies and billing policies in the mobile communication network Can be performed.

The first intelligent network 140 may be, for example, an IMS (IP Multimedia Subsystem) that can be defined as an intelligent network node of a calling party. The first INC 140 may include an Originating- Call Session Control Function (O-CSCF) ) 142, a home location register (HLR) 144, and an originating-application server (O-AS) 146.

First, an outgoing call session control node (O-CSCF) 142 is an infrastructure system performing call processing and performing a basic function for multimedia session control based on SIP (Session Initiation Protocol) The control node 142 handles subscriber registration, authentication, billing, service triggering and routing, caller location inquiry, and decompression and release of SIP messages. The control node 142 is divided into Proxy_CSCF, Interogating-CSCF, and Serving- .

The subscriber information node (HLR) 144 refers to a server node including a database storing subscriber information and the like for a mobile communication network (e.g., LTE network). The subscriber profile information, authentication, Data and the like can be provided. Here, the HLR 144 may be defined (collectively) as an HSS (Home Subscriber Server) that can provide the same or similar functions.

The originating application service node (O-AS) 146 then sends a message for additional service operations such as caller indication, outgoing / incoming call prohibition, call forwarding, group video call, and call processing, call connection management, Fields, etc., and can perform functions such as billing and interworking with various nodes for performing call session control node (CSCF), subscriber information node (HLR), multimedia resource node (MRF) Operation, management, maintenance, and so on. Here, the originating application service node (O-AS) may be defined as an originating-telephony application server (O-TAS).

On the other hand, the second intelligent network 150 may mean, for example, an IMS (IP Multimedia Subsystem), which may be defined as an intelligent network node of the called party. The second intelligent network 150 includes a terminating- Function 151, a home location register (HLR) 152, a terminating application server (T-AS) 153, a multimedia resource node (MRF) 154 And an additional service node 155 and the like.

First, an incoming call session control node (T-CSCF) 151 is an infrastructure system that performs substantially the same functions as the origination call session control node 142, and in accordance with the present invention, 140 to the terminating application service node 153 when the connection request message (SIP INVITE) message is received, and when receiving the ringing message 180 from the terminating application service node 153 in response to the connection request message, And the like can be provided.

The incoming call session control node 151 also receives a radio resource allocation request message (for example, 183 message) for silence announcement broadcast received from the receiving application service node 153, a dummy packet for executing silence announcement broadcast play, To the calling party, and so forth.

The T-AS 153 can then perform substantially the same functions as the originating application service node 146, such that the terminating application service node T- (Terminating - Telephony Application Server).

In addition, in the situation where the calling application terminal 153 is playing a local ring back tone (ring signal) according to a local response from the called terminal in response to the connection request, the called application service node 153 A dummy packet is transmitted to the calling terminal in order to maintain the session of the allocated radio resource, and a SIP INVITE message of the specific supplementary service is added to the calling terminal To the service node 155. For this purpose, the destination application service node 153 may have a configuration as shown in FIG. 2 as an example. The destination application service node 153 ) Will be described later in detail with reference to FIG.

The multimedia resource node (MRF) 154 may function as a multimedia server that provides a multimedia service control, management, and codec conversion function provided to a subscriber. For this purpose, a call announcement broadcast (voice / Video), group video call (media conference), conversion between text and voice / speech recognition, and real-time transcoding of multimedia data. To this end, the MRF 154 may include a media resource function controller and a media resource function processor, although not shown in the drawing.

In addition, the multimedia resource node 153 transmits dummy packets for execution of the silent announcement broadcast to the subscriber DB 153 when a request for an silence announcement (INFO) message is transmitted from the receiving application service node 153 according to the present invention. (Not shown) and transfer it to the incoming application service node 153. [

On the other hand, when an execution request (SIP INVITE) message of a specific supplementary service is received from the called call session control node 151 in response to a request from the called application service node 153, The calling subscriber terminal can selectively perform a function of selectively providing a specific additional service such as a voice mailbox service and a calling number memo plus service. To the terminating application service node 153 via the network interface 160. [

FIG. 2 is a block diagram of a node device suitable for applying a terminal control scheme according to the present invention. The node device includes a call processing block 202, a subscriber DB 204, a billing block 206, an interworking interface block 208, (210), and the like.

Referring to FIG. 2, the call processing block 202 includes a message processing module 202 for performing additional service operations such as caller indication, call / incoming call prohibition, call forwarding, group video call, and the like, The call processing block 202 may include a terminal control unit having a configuration as shown in FIG. 3. The call control block 202 may perform a call processing and a packet processing for executing a broadcast play.

3 is a block diagram of a terminal control apparatus for an additional service according to the present invention and includes a message transmission unit 302, a terminal determination unit 304, a service driving unit 306, a resource management unit 308, and a dummy packet generation unit 310), and the like.

3, when a connection request (SIP INVITE) is received from the calling terminal 110/1, the message transmitting unit 302 transmits the connection request (SIP INVITE) to the called terminal 110/2, To send a message (180 ringing message) for play of the local ring back tone to the calling terminal 110/1 side according to a local response (e.g., reception of a 180 ringing message) have.

Next, the terminal determination unit 304 determines whether the destination terminal 110/2 is the target terminal of the predetermined supplementary service support by searching for the terminal information in the subscriber DB 204, and outputs the determination result to the service driver To the resource management unit 306 and the resource management unit 308, respectively.

To this end, the subscriber DB 204 of FIG. 2 stores registration state information including subscriber's supplementary service status and terminal information (i.e., terminal information related to predetermined specific supplementary services, etc.).

Here, the service driver 306 transmits the SIP 180 ringing message to the calling party when the calling terminal 110/2 having received the call connection request from the calling terminal 110/1 is the terminal supporting the predetermined additional service (For example, 30 seconds, 40 seconds, 50 seconds, 60 seconds, etc.), the multimedia resource node 154 counts the elapsed time of the corresponding supplementary service start time And a function of requesting the driving of the display device. At this time, support of predetermined specific additional services (for example, voice mail service, calling number memo plus service, etc.) may mean that the called terminal is subscribed to the related specific additional service.

The resource management unit 308 then notifies the calling terminal 110/1 of the radio resource (i.e., the radio resource) to the calling terminal 110/2 when the terminal determining unit 304 notifies the called terminal 110/2 Request for allocation of radio resources for silence announcement), and the like.

Finally, the dummy packet generating unit 310 transmits a dummy packet acquired from the multimedia resource node 154 to the calling terminal 110/1 so that the session of the radio resource allocated to the calling terminal 110 / (110/1) side, for example.

2, the charging block 206 may provide a function of performing a related charging process when the communication terminals are provided with an additional service or the like performed in the intelligent network, and the interlocking interface block 208 may perform a call session control (CSCF), subscriber information node (HLR), application service node (OS), and various nodes necessary for performing various additional services.

The operation management maintenance (OAM) block 210 provides a function of processing the operation, management, and maintenance of the called application service node 153 in the second intelligent network 150 can do.

Next, a series of processes for controlling call processing of a terminal for an additional service according to the present invention using a mobile communication system having the above-described configuration will be described in detail.

4 is a flowchart illustrating a call processing process including a silent announcement broadcast play service provided according to the present invention when a connection request to a called terminal is generated.

Referring to FIG. 4, when the calling terminal 110/1 generates a connection request (SIP Invite) message to call the called terminal 110/2 and transmits the connection request message to the base station 120/1, 1 receives the connection request message from the mobile communication network 130 and the second intelligent network (the outgoing call session control node 142, the origination application service node 146, the outgoing call session control node 142) 150 to the called application service node 153 via the path via the incoming call session control node 151 (steps 401, 402).

That is, the calling application service node 146 on the calling side transmits a SIP Invite message to the called application service node 153 to request paging for the called terminal 110/2, The called terminal 110/2 transmits the SIP 180 ringing message to the called application service node 153 via the path via the mobile communication network 130 in step 403, The originating application service node 146 transmits the SIP 180 ringing message to the calling party and the calling terminal 110/2 receives the call through the path through the mobile communication network 130 and the base station 120/1 The calling terminal 110/1 sends a SIP ringing message (i.e., a message for playing the local ring back tone) to the calling terminal 110/1 (step 404) The ring signal is generated by itself.

At this time, if there is no packet reception from the called party (the receiving terminal side) for a predetermined period of time (e.g., 10 seconds), the mobile communication network 130 releases radio resources for preventing unnecessary resource waste, The terminal 110/1 is switched from an active mode to a preservation mode (or idle mode) of radio resource release.

Next, the receiving application service node 153 transmits the SIP 180 ringing message to the calling party, and searches through the subscriber DB 204 to determine whether the calling terminal 110/2 is the target terminal of the predetermined additional service support (Step 405). When the counted elapsed time reaches a preset additional service start reference time (for example, 30 seconds, 40 seconds, 50 seconds, 60 seconds, etc.) And sends a SIP invite to the multimedia resource node 154 to request resources for silent transmission (step 406).

In response to this, when a SIP 200 OK message indicating the call release (allocation of radio resources) of the calling terminal is received from the multimedia resource node 154 for silence announcement broadcasting (step 407), the called application service node 153 A message to allocate radio resources for silence announcement, e.g., a SIP 183 message, to a calling application service node 146 via a path via an incoming call session control node 151 and outgoing call session control node 142 (Step 408).

Thus, the originating application service node 146 may send a message to the mobile communication network 130 via the outgoing call session control node 142 to allocate radio resources for silence announcement broadcast (e.g., a SIP Session Progress message message , Thereby allocating radio resources to the calling terminal 110/1.

The destination application service node 153 transmits a SIP 183 message to the calling party, and then generates a message (e.g., an INFO message) requesting execution of silence announcement broadcast to the multimedia resource node 154 (step 409) .

In response, the multimedia resource node 154 generates dummy packets for silent announcement broadcast and transmits the generated dummy packets to the destination application service node 153, and the silence announcement broadcast dummy packets transmitted to the destination application service node 153 A route via the call session control node 151, outgoing call session control node 142, originating application service node 146, outgoing call session control node 142, mobile communication network 130 and base station 120/1 To the calling terminal 110/1 (step 410).

As a result, in the calling terminal 110/1, the session of the radio resource allocated through execution (play) of silence announcement is maintained. Therefore, the calling terminal 110/1 can receive the signaling message (for example, a voice message) sent by the additional service node 155 for execution (play) of the specific supplementary service, because the dummy packet for silence announcement broadcasting is continuously received and maintained in the active state For example, a SIP 200 OK message) without loss.

Next, the receiving application service node 153 generates an SIP inbox message meaning to execute a specific additional service preset for the called terminal, and transmits the SIP inbox message through the path via the incoming call session control node 151 (Step 411), the supplementary service node 155 generates a SIP 200 message indicating execution of the specific supplementary service predetermined by the destination terminal 110/2, and transmits the SIP 200 message to the destination application service node 153 (step 412).

Thereafter, a SIP 200 message indicating execution of a predetermined additional service is transmitted to the incoming call session control node 151, the outgoing call session control node 142, the originating application service node 146, the outgoing call session control node 142, The mobile communication network 130 and the base station 120/1 to the calling terminal 110/1 through the route to the calling terminal 110/2 , A voice mail service, a calling number memo plus service, etc.) is served to the calling terminal 110/1.

Next, according to the present invention, when a ringing signal is being generated in a state in which a calling terminal that has called a called terminal supporting a specific additional service is released, a radio resource is allocated to the calling terminal and silence announcement is executed A detailed description will be given of a series of processes with the receiving application service node as a center.

FIG. 5 is a flowchart illustrating a main process of providing a calling terminal including a silent announcement broadcast play service to a calling terminal according to the present invention.

5, the terminal determination unit 304 in the receiving application service node 153 transmits the SIP ringing message to the calling party (step 502) and searches for the terminal information in the subscriber DB 204 (step 504) , It is determined whether the destination terminal 110/2 is the target terminal for the predetermined supplementary service (step 506).

If it is determined in step 506 that the called terminal is the target terminal of the predetermined supplementary service support, the service driver 306 counts the elapsed time since the SIP 180 ringing message was transmitted to the calling party (step 508) , It is checked whether or not the counted elapsed time t has reached the preset supplementary service start reference time n (step 510). Here, the supplementary service start reference time n may be set to, for example, 30 seconds, 40 seconds, 50 seconds, 60 seconds, or the like.

If it is determined in step 510 that the counted elapsed time t has reached the predefined supplementary service start reference time n, the service driver 306 generates an SIP invite message, Node 154 to request allocation of radio resources (radio resources for silence transmission) to the terminating terminal 110/2 (step 512).

Thereafter, the resource management unit 308 generates a SIP session progress message for allocating a radio resource for silence announcement broadcast, and transmits the SIP session message to the called call session control node 151 and the outgoing call session control node 142 The originating application service node 146 transmits a radio resource for silence announcement broadcast to the mobile communication network 130 through a path via the outgoing call session control node 142 (Step 514). ≪ / RTI >

Accordingly, radio resources for silence announcement broadcasting are allocated to the calling terminal 110/1, and then the dummy packet generating unit 310 acquires dummy packets (silence announcement packets) from the multimedia resource node 154 An outgoing call session control node 142, an originating application service node 146 (hereinafter referred to as " originating application service node ") 142 so as to maintain a session of radio resources allocated to the calling terminal 110/1 for silence announcement, The outgoing call session control node 142, the mobile communication network 130 and the base station 120/1 to the calling terminal 110/1.

As a result, the calling terminal 110/1 is in the active mode state (e.g., a busy state) until a signaling message (e.g., a SIP 200 OK message) generated from the additional service node 155 is received for execution And the session of the allocated radio resource is maintained through execution of silence announcement broadcasting (step 516).

Meanwhile, in the embodiment of the present invention, an additional service node providing a specific supplementary service to a calling terminal is installed in the intelligent network when the called terminal supporting the supplementary service does not respond to the connection request of the calling terminal, But the present invention is not limited thereto. For example, as shown in FIG. 6, it may be a server node built outside the intelligent network.

FIG. 6 is a block diagram for explaining a case where an additional service node providing a specific additional service to a calling terminal exists outside the intelligent network according to the present invention.

6, when the supplementary service node 620 exists outside the second intelligent network 150, the incoming call session control node 151 and the supplementary service node 620 of the external network connect to the media gateway node 620. [ (I.e., form a communication path) through the media gateway 610 (e.g., MGW: Media Gateway). That is, in this case, the signaling for providing the specific supplementary service may be performed by the path of the incoming call session control node 151, the media gateway node 610, and the additional service node 620.

Herein, the media gateway node 610 performs signaling for interworking with an LTE mobile communication network connected to the incoming call session control node 151 and a WCDMA mobile communication system (not shown) connected to a circuit network (not shown) And so on.

Further, the supplementary service node 620 may be defined as a contents registration system (CRS), for example, in the case of providing specific supplementary services related to a ring back tone to legacy terminals of a WCDMA mobile communication system.

Meanwhile, in the embodiment of the present invention, the application resource node (receiving application service node) performs the radio resource allocation and the dummy pattern transmission to the calling terminal for silence announcement broadcasting, but the present invention is not limited thereto And transmits the dummy pattern to the calling terminal for the silence announcement by applying (mounting) the constituent members capable of performing related functions to the call session control node (called call session control node) But may be designed to be performed by a control node (incoming call session control node).

On the other hand, in the embodiment of the present invention, the radio resource allocation and the dummy pattern transmission service to the calling terminal for the silent announcement broadcasting are provided in the network environment where the calling-side intelligent network and the called- It is needless to say that the present invention is not limited thereto, and it is also possible to design the integrated intelligent network to provide the same functions and services. In this case, the intelligent network may be designed to mount only one call session control node and an application service node.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. It is easy to see that this is possible. That is, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the present invention.

Therefore, the scope of protection of the present invention should be construed in accordance with the following claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

According to the embodiment of the present invention, when a calling terminal whose radio resource is released is generating a ring signal by itself, a radio resource for silence announcement broadcasting is allocated to the calling terminal, and a session of the allocated radio resource is maintained A silent announcement broadcasting is performed by transmitting dummy packets to the calling terminal, thereby blocking the loss of the signaling packet, thereby effectively preventing the initial silence due to the loss of the signaling packet can do.

The present invention including such a technical configuration can be applied to a VoLTE (or LTE) mobile communication network or a heterogeneous mixed mobile communication network, thereby improving the quality of experience of initial mute in VoLTE (or LTE) communication service or heterogeneous communication service.

302: Message transmission unit 304:
306: service driver 308: resource manager
310: a dummy packet generating unit

Claims (10)

Checking whether the called terminal is a target terminal of a predetermined specific supplementary service support when the calling terminal is executing a local ringback tone according to a local response from the called terminal in response to the connection request;
Requesting allocation of a radio resource for silence announcement to the calling terminal when the target terminal is a terminal;
A process of transmitting a dummy packet to the calling terminal for maintaining a session of the allocated radio resource
And transmitting the service to the terminal. The method according to claim 1,
The predetermined specific additional service includes:
Additional service related to ringback tone
A terminal control method for an additional service. The method according to claim 1,
When the radio resource is allocated, the calling terminal switches from the preservation mode of the radio resource release to the active mode
A terminal control method for an additional service. The method according to claim 1,
The dummy packet includes:
A packet containing a packet for execution of the silence announcement
A terminal control method for an additional service. 5. The method of claim 4,
The dummy packet includes:
Provided from the multimedia resource node
A terminal control method for an additional service. The method according to claim 1,
The radio resource allocation request and the dummy packet transmission to the calling terminal,
Lt; RTI ID = 0.0 > application service node or call session control node in the intelligent network
A terminal control method for an additional service. A message transmitter for transmitting a connection request from the calling terminal to the called terminal and transmitting a message for execution of the local ringback tone to the calling terminal according to a local response from the called terminal for the connection request;
A terminal discrimination unit for discriminating whether the called terminal is a target terminal for supporting a specific supplementary service,
A resource manager for requesting allocation of a radio resource to the calling terminal when the terminal is the target terminal;
A dummy packet generating unit for transmitting a dummy packet to the calling terminal for maintaining a session of the allocated radio resource,
And a terminal control unit. 8. The method of claim 7,
The resource management unit,
Requesting the radio resource allocation to provide a silence announcement service to the calling terminal
A terminal control device for an additional service. 8. The method of claim 7,
Wherein the dummy packet generating unit comprises:
Acquiring the dummy packet from the multimedia resource node
A terminal control device for an additional service. 8. The method of claim 7,
The apparatus comprises:
When the predetermined additional service start reference time is reached, the service driver
And a terminal control unit for controlling the terminal.

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