KR20090016906A - Method and system for providing location/presence information in ip multimedia subsystem - Google Patents

Abstract

A method and a system for providing location/presence information in an IP multimedia subsystem are provided to supply referred information to a mobile communication terminal by referring to location information of a taxi and taxi information usable in an area where the mobile communication terminal is located, thereby providing a simple call taxi service. A car terminal/mobile communication terminal transmits a registration request message to P-CSCF through an IMS network(S102). The P-CSCF transmits the registration request message to I-CSCF(S104). The I-CSCF transmits an S-CSCF location request message by HSS(S106). An S-CSCF location response message is received from the HSS(S108). The I-CSCF transmits the registration request message by S-CSCF corresponding to an S-CSCF position response(S110). The S-CSCF transmits a subscriber information request message by the HSS(S112). The S-CSCF requests service registration to a presence server (S116) after the S-CSCF receives subscriber information from the S-CSCF(S114).

Description

Method and system for providing location / status information in IMS network {Method and System for providing location / presence information in IP Multimedia Subsystem}

The present invention relates to a method and system for providing location information and status information of a vehicle terminal to a mobile communication terminal in an IMS (IP Multimedia Subsystem) network.

Recently, with the rapid development of mobile communication and the Internet, there is a demand for realization of various high quality multimedia services for mobile subscribers. The development of Internet multimedia services has required a change from the existing circuit-based CN (Core Network) to a packet-based CN, and further, is seeking to evolve into a next-generation core network (CN) in the form of an IP-based CN. .

Currently, 3GPP is standardizing ALL IP based network reference model to provide IP (based on multimedia) service. The IM service is a service that can simultaneously provide various types of packet-based services based on the IP transmission protocol to the mobile subscriber. This means that the subscriber can use real-time services such as voice and video. It allows you to use non real-time services such as file transfers, e-mails, and short messages at the same time, or to use new services such as Video Phone, Instant Messaging, and Emergency Call services. Means that. In order to provide both real-time and non-real-time services to users, ALL IP network, which is the core network structure of IP based on 3GPP, introduced IP technology to 3G mobile communication network, is mainly based on Radio Network Domain and GPRS based packet exchange. It may be divided into a GPRS packet switched service domain and an IP multimedia service domain.

The GPRS-based packet switched service domain is responsible for delivering user packet data between a wireless access network domain and an external network or IM service domain, and serves a GPRS support node (SGSN) and a gateway that manage mobility of a mobile communication terminal. GPRS Support Node). The IM service domain is a CSCF that handles registration and multimedia call processing using the Session Initiation Protocol (SIP) protocol, and an HSS that integrates the mobility management and authentication of IP multimedia users with the HLR capabilities of legacy mobile networks. It consists of. Since the Call Session Control Function (CSCF) performs different functions depending on the network in which the subscriber is located, the Proxy-CSCF (P-CSCF), Interrogating CSCF (I-CSCF), and Serving CSCF are based on the location and role. It can be logically divided into (S-CSCF).

On the other hand, in general, if you want to use a call taxi service, by contacting a taxi call center, and call a taxi available nearby in the taxi call center, the taxi user provides a call taxi service through the taxi responding to the location of the taxi And there is a problem in that the call taxi call in an indirect manner without information on the status of the call center expenses and accurate information is not provided.

An object of the present invention is that when a vehicle terminal requests location information registration in an IMS network, the base station acquires the location information of the vehicle terminal in association with the vehicle terminal and stores the location information in the presence server, and requests the location information of the vehicle terminal from the mobile communication terminal. The present invention provides a method and system for providing location / status information in an IMS network for transmitting location information stored in the presence server to the mobile communication terminal.

Another object of the present invention is to store the state information of the vehicle equipped with the vehicle terminal in the Presence server using the SIP message in the IMS network, and when receiving the status information request message from the mobile communication terminal, the state information stored in the Presence server The present invention provides a method and system for providing location / status information in an IMS network for transmitting to a mobile communication terminal.

According to an aspect of the present invention to achieve the above object, a method for providing location / status information in an IP Multimedia Subsystem (IMS) network, (a) when the vehicle terminal requests registration of the location information, the base station and the vehicle terminal Acquiring the location information of the vehicle terminal in association with the vehicle terminal and storing the location information in the Presence server through the IMS network; (b) storing the state information in the Presence server through the IMS network using the SIP (Session Initiation Protocol) message; (c) receiving a location / status information request message of the vehicle terminal from a mobile communication terminal through an IMS network at the presence server; and (d) in response to the location / status information request message of the vehicle terminal, Transmitting vehicle terminal information including location / status information and pre-registered identification information stored in a server to the mobile communication terminal; This provides the location / state information in the IMS network, including a method is provided.

In the step (a), the location information is obtained using any one of a Cell ID, a Global Positioning System (GPS), and an Observed Time Difference Of Arrival (OTDOA).

The location information corresponds to the location of the vehicle on which the vehicle terminal is mounted, and the state information corresponds to availability information of the vehicle on which the vehicle terminal is mounted.

The identification information is characterized in that the telephone number of the vehicle terminal holder.

According to another aspect of the present invention, a system for providing location / status information in an IP Multimedia Subsystem (IMS) network, wherein the vehicle provides status information to a Presence server through an IMS network using a Session Initiation Protocol (SIP) message. When the terminal and the vehicle terminal request the location information registration, the base station provides the Presence server through the IMS network and acquires the location information of the vehicle terminal in association with the vehicle terminal, and the mobile terminal from the mobile terminal through the IMS network. Upon receiving the location / status information request message, providing location / status information in an IMS network including a presence server for transmitting vehicle terminal information including the provided location / status information and pre-registered identification information to the mobile communication terminal. A system is provided.

The base station obtains location information using any one of a Cell ID, a Global Positioning System (GPS), and an Observed Time Difference Of Arrival (OTDOA).

The location information corresponds to the location of the vehicle on which the vehicle terminal is mounted, and the state information corresponds to availability information of the vehicle on which the vehicle terminal is mounted.

The identification information is characterized in that the telephone number of the vehicle terminal holder.

As described above, when the vehicle terminal requests the location information registration in the IMS network, the base station acquires the location information of the vehicle terminal in association with the vehicle terminal and stores the location information in the Presence server, and the vehicle terminal from the mobile communication terminal. When receiving the location information request message of the, may provide a method and system for providing location / status information in the IMS network for transmitting the location information stored in the Presence server to the mobile communication terminal.

According to the present invention, the IMS network stores the state information of the vehicle equipped with the vehicle terminal in the Presence server using the SIP message, and when the state information request message is received from the mobile communication terminal, stored in the Presence server. A method and system for providing location / status information in an IMS network for transmitting status information to the mobile communication terminal can be provided.

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

1 is a diagram illustrating a configuration of a system for providing location / state information in an IMS network according to the present invention.

Referring to FIG. 1, a system for providing location / state information in an IMS network according to the present invention includes a vehicle terminal 102 and a mobile communication terminal connected to an electronic control unit (ECU) 100 mounted in a vehicle. (104), base station 106, Mobile Switching Center (MSC) / Serving GPRS Support Node (SGSN) 108, Gateway GPRS Support Node (GGSN) 110, Proxy-Call Session Control Function (P-CSCF) ( 112), Interrogating-Call Session Control Function (I-CSCF) 114, Serving-Call Session Control Function (S-CSCF) 116, Home Subscriber Server (HSS) 118, Gateway Mobile Location Center (GMLC) 120 and Presence server 200.

The vehicle terminal 102 provides status information to a Presence server through an IP Multimedia Subsystem (IMS) network using a Session Initiation Protocol (SIP) message.

In this case, the state information corresponds to the availability information of the vehicle on which the vehicle terminal 102 is mounted. For example, the state information is information on whether the vehicle on which the vehicle terminal 102 is mounted is an empty taxi.

On the other hand, when the vehicle terminal 102 requests the location registration to the MSC / SGSN 108, the MSC / SGSN 108 requests the subscriber location information to the base station 106, the base station 106 In conjunction with the vehicle terminal 102, the location information of the vehicle terminal 102 is obtained and provided to the Presence server 200 through the IMS network. In this case, the location information corresponds to the current location of the vehicle on which the vehicle terminal 102 is mounted.

In addition, the base station 106 obtains the location information using any one of a Cell ID, a Global Positioning System (GPS), and an Observed Time Difference Of Arrival (OTDOA).

That is, the base station 106 can obtain the location information by checking a cell ID and obtaining a round trip time (RTT) value to find out how far the radius is located in the base station. Synchronization between the base stations and obtains the position information by obtaining a round trip time (RTT) value from the plurality of base stations, and equipped with a GPS receiver in the vehicle terminal 102 and the GPS information from the vehicle terminal 102 By receiving, positional information can be obtained.

Here, the method using the Cell ID has the advantage that it is easy to implement, but the disadvantage is that the accuracy is low, and the OTDOA method has the advantage that it can be received even in a tunnel or indoors, but the accuracy is reduced due to problems such as multipath. Although there is a disadvantage in that the method using the GPS has a relatively high accuracy, there is a burden of separately mounting a GPS receiver in a vehicle terminal, and thus an optimal method in consideration of terminal resources and channel environment in a network to which the present invention is applied. It is preferable to select.

Meanwhile, when the presence server 200 receives a location / status information request message of the vehicle terminal 102 from the mobile communication terminal 104 through an IMS network, the presence server and the state information provided from the vehicle terminal 102 are used. Vehicle terminal information including location information and pre-registered identification information provided from the base station 106 is transmitted to the mobile communication terminal 104. In this case, the identification information may be a phone number of the holder of the vehicle terminal 102.

On the other hand, in the above-described IMS network according to the present invention, the system for providing location / state information includes not only wideband code division multiple access (WCDMA) but also code division multiple access (CDMA) and wireless (WDMA). broadband (WiBro) and the like can be applied to a wireless network that is guaranteed mobility, but is not limited to the above embodiment.

2 is a block diagram schematically showing an internal configuration of a presence server according to the present invention.

Referring to FIG. 2, the presence server 200 includes a subscriber manager 202, a mobile terminal location information manager 204, a vehicle terminal location information manager 206, a vehicle terminal status information manager 208, and a database 210. The database 210 includes a subscriber information storage area 212, a mobile communication terminal location information storage area 214, a vehicle terminal location information storage area 216, and a vehicle terminal status information storage area 218. do.

The subscriber manager 202 stores subscriber information provided from the vehicle terminal and the mobile communication terminal in the subscriber information storage area 212 of the database 210 through the IMS network. In this case, the subscriber information provided from the vehicle terminal includes identification information corresponding to the telephone number of the vehicle terminal owner.

The mobile terminal location information manager 204 stores location information provided from the mobile terminal through the IMS network in the mobile terminal location information storage area 214 of the database 210. Meanwhile, when the presence server 200 receives a location / status information request message of the vehicle terminal from the mobile terminal, the location / status information of the vehicle terminal is based on the stored location information of the mobile terminal. Find and send your current location.

The vehicle terminal location information management unit 206 receives the location information of the vehicle terminal from the base station interworking with the vehicle terminal through the IMS network, stores the location information of the vehicle terminal in the vehicle terminal location information storage area 216 of the database 210, and performs mobile communication. When the vehicle terminal location information request message is received from the terminal, the location information of the stored vehicle terminal is transmitted to the mobile communication terminal through an IMS network.

The vehicle terminal state information management unit 208 receives the state information from the vehicle terminal through the IMS network and stores the state information in the vehicle terminal state information storage area 218 of the database 210 and requests the vehicle terminal state information request message from the mobile communication terminal. When receiving the state information of the stored vehicle terminal is transmitted to the mobile communication terminal through the IMS network.

3 is a flowchart illustrating a process of registering a subscriber with a presence server according to the present invention.

Referring to FIG. 3, the vehicle terminal / mobile communication terminal transmits a registration request message to the P-CSCF through the IMS network (S102), and accordingly, the P-CSCF transmits a registration request message to the I-CSCF ( S104).

In addition, the I-CSCF transmits an S-CSCF location request message to the HSS (S106), and receives an S-CSCF location response message from the HSS (S108). Thereafter, the I-CSCF transmits a registration request message to the S-CSCF corresponding to the S-CSCF location response (S110).

Thereafter, the S-CSCF transmits a subscriber information request message to the HSS (S112), receives subscriber information from the S-CSCF (S114), and then requests a service registration to a Presence server (S116).

4 is a flowchart illustrating a process of providing location information to a presence server according to the present invention.

Referring to FIG. 4, the vehicle terminal transmits a Location Service Invoke message to the MSC / SGSN to transmit location information to the Presence server (S202).

Accordingly, the MSC / SGSN transmits a subscriber location information request message including quality of system (QoS) information, GMLC information, and presence server information to a base station, for example, a radio access network (RAN) (S204). In this case, the QoS information is information on a location information acquisition method, and may obtain location information using any one of a Cell ID, a Global Positioning System (GPS), and an Observed Time Difference Of Arrival (OTDOA).

Thereafter, the RAN interworks with the vehicle terminal and performs a subscriber location information acquisition procedure using any one of Cell ID, Global Positioning System (GPS), and Observed Time Difference Of Arrival (OTDOA) (S206).

Thereafter, the RAN transmits the obtained subscriber location information to the MSC / SGSN (S208), and accordingly, the MSC / SGSN transfers the subscriber location information to GMLC (S210).

Thereafter, the GMLC transmits the subscriber location information to the presence server (S212), and the presence server stores the subscriber location information in a database (S214).

5 is a flowchart illustrating a method of providing location / status information in an IMS network according to the present invention.

Referring to FIG. 5, the mobile communication terminal transmits a location / status information request message to a P-CSCF via an IMS network (S302), and the P-CSCF forwards the location / status information request message to an I-CSCF. (S304).

Thereafter, the I-CSCF transmits an S-CSCF location request message to the HSS (S306), and receives an S-CSCF location response message from the HSS (S308). Thereafter, the I-CSCF transmits a location / status information request message to the S-CSCF corresponding to the S-CSCF location response (S310). Accordingly, the S-CSCF transmits the location / status information request message to the Presence server (S312).

Accordingly, the presence server searches for location / state information of the vehicle terminal with reference to a database, and searches for location information of the mobile communication terminal (S314).

In addition, the presence server transmits the vehicle terminal information including the position / status information of the vehicle terminal and pre-registered identification information to the S-CSCF for transmission to the mobile communication terminal based on the retrieved location information of the mobile communication terminal. (S316). In this case, the location information corresponds to the position of the vehicle on which the vehicle terminal is mounted, the state information corresponds to the availability information of the vehicle on which the vehicle terminal is mounted, and the identification information corresponds to the telephone number of the vehicle terminal holder. .

Accordingly, the S-CSCF transmits the transmitted vehicle terminal information to the P-CSCF (S318), and the P-CSCF transmits the vehicle terminal information to the mobile communication terminal (S320).

The present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention.

In the above-described method for providing location / state information in the IMS network, code division multiple access (CDMA), wideband code division multiple access (WCDMA), and wireless broadband (WiBro) are provided. It may be applied to a wireless network that is guaranteed mobility.

1 is a diagram illustrating a configuration of a system for providing location / state information in an IMS network according to the present invention.

Figure 2 is a block diagram schematically showing the internal configuration of the presence server according to the present invention.

3 is a flowchart illustrating a process of registering a subscriber with a Presence server according to the present invention.

4 is a flowchart illustrating a process of providing location information to a presence server according to the present invention;

5 is a flowchart illustrating a method of providing location / status information in an IMS network according to the present invention.

<Explanation of symbols for the main parts of the drawings>

102 vehicle terminal 104 mobile communication terminal

106: base station 108: MSC / SGSN

116: S-CSCF 118: HSS

120: GMLC 200: Presence Server

Claims (8)

As a method for providing location / status information in an IP Multimedia Subsystem (IMS) network, (a) when the vehicle terminal requests location information registration, the base station obtaining the location information of the vehicle terminal in association with the vehicle terminal and storing the location information in the Presence server through the IMS network; (b) the vehicle terminal storing state information in a presence server through an IMS network using a Session Initiation Protocol (SIP) message; (c) receiving a location / status information request message of the vehicle terminal from the mobile communication terminal through an IMS network in the presence server; And (d) in response to the location / status information request message of the vehicle terminal, transmitting vehicle terminal information including location / status information stored in the presence server and pre-registered identification information to the mobile communication terminal; Location / status information providing method in the IMS network comprising a. The method of claim 1, Wherein the step (a), location / status information providing method in the IMS network, characterized in that to obtain the location information using any one of Cell ID, Global Positioning System (GPS), Observed Time Difference Of Arrival (OTDOA). The method of claim 1, The location information corresponds to the location of the vehicle on which the vehicle terminal is mounted, and the status information corresponds to the availability information of the vehicle on which the vehicle terminal is mounted. The method of claim 1, And the identification information is a telephone number of the vehicle terminal holder. A system for providing location / status information in an IMS (IP Multimedia Subsystem) network. A vehicle terminal providing status information to a Presence server through an IMS network using a Session Initiation Protocol (SIP) message; A base station for obtaining location information of the vehicle terminal in cooperation with the vehicle terminal and providing the location information to a Presence server through an IMS network when the vehicle terminal requests registration of location information; And Presence server for transmitting the vehicle terminal information including the provided location / status information and the registered identification information to the mobile communication terminal when receiving the location / status information request message of the vehicle terminal from the mobile communication terminal through the IMS network ; Location / status information providing system in the IMS network comprising a. The method of claim 5, And the base station acquires location information using any one of a cell ID, a global positioning system (GPS), and an Observed Time Difference Of Arrival (OTDOA). The method of claim 5, And the location information corresponds to the location of the vehicle on which the vehicle terminal is mounted, and the status information corresponds to the availability information of the vehicle on which the vehicle terminal is mounted. The method of claim 5, And said identification information is a telephone number of said vehicle terminal holder.

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