KR20060020347A - Mobile communication system using push to talk scheme and group allocation method thereof - Google Patents

Abstract

The present invention is a mobile communication system employing a push to talk (PTT) method, performs the overall control of the PTT subscriber group and the real-time management operation of the PTT subscriber group, the information of the PTT subscriber and the group list set by each subscriber Manages and assigns a Ph.D. group for pre-set information and knowledge transfer to the Ph.D. group according to the information of each subscriber, and adds a Ph.D. group to the group list set by each subscriber, and a group from the PTT server. And a subscriber station mobile communication terminal having a PTT module for performing a PTT call related operation including an operation of receiving and displaying a list. Also, in the PTT server, the process of assigning a PhD group, the process of analyzing each subscriber's information, registering each subscriber with the PhD group, and adding the PhD group to the group list set by each subscriber Do this.

PTT, mobile communication, group

Description

Mobile communication system employing push-to-talk method and group allocation method {MOBILE COMMUNICATION SYSTEM USING PUSH TO TALK SCHEME AND GROUP ALLOCATION METHOD THEREOF}             

1 is a schematic overall block diagram of a mobile communication system employing a push to talk (PTT) method according to an embodiment of the present invention;

Figure 2a is a block diagram of the whole PTT mobile communication terminal to which the present invention is applied

2b is a structural diagram of a PTT mobile communication terminal to which the present invention is applied;

3 is a flowchart illustrating an exemplary PTT call operation in the mobile communication system of FIG.

4 is a flowchart illustrating an example of a PTT call operation in the mobile communication system of FIG.

The present invention relates to a mobile communication system employing a push-to-talk (PTT) scheme and a group allocation method thereof.

PTT is a term used to refer to the basic radio communication method of the radio.The user operates the PTT button appropriately provided on the radio or the TRS (Trunked Radio System) terminal. It is a way to make a call operation. This PTT call allows one-to-one or one-to-many instant communication.

Recently, a mobile communication system has been provided with a VoIP (Voice over IP) type of Internet telephony service after a unique IP (Internet Protocol) address is assigned to a terminal, and using such VoIP, one-to-one or one-to-many between mobile communication terminals, such as a radio. The mobile communication PTT service is provided in a format.

The PTT service is a service that enables voice / data services simultaneously for a plurality of users or groups among mobile communication terminal users, and the user is appropriately provided in a mobile communication terminal capable of PTT service in advance when a PTT service is requested. The PTT button is pressed, and accordingly, the PTT mobile communication terminal transmits a PTT service request to the mobile communication network. The mobile communication network rejects the request or allocates the requested resource according to criteria such as availability of resources and priority of the requesting user. This establishes a connection with all other active users in a particular user group. At this time, the called PTT mobile communication terminal notifies the user that the PTT call request has been received by outputting an appropriate notification sound and displaying a message. Accordingly, the called PTT mobile terminal user recognizes that the PTT call request has been received, and initiates a PTT call with the caller of the calling PTT mobile communication terminal. After the voice connection is established, the service requesting user can transmit voice, and other users can hear the transmitted voice on the channel.

Currently, the mobile communication PTT service is developed and adopted to meet the various needs of the user and to make the user more convenient to use.

Accordingly, an object of the present invention is to provide a mobile communication system employing a PTT method and a group allocation method thereof that can easily provide various information and knowledge to a subscriber with a simpler configuration and operation.

In order to achieve the above object, an aspect of the present invention is a mobile communication system employing a push to talk (PTT) method, performing overall control of the PTT subscriber group and real-time management operation of the PTT subscriber group, PTT subscriber Manages the information of the group and the group list set by each subscriber, assigns a group for delivering information and knowledge set in advance, and registers the information and knowledge transfer group according to the information of each subscriber, and transmits the information and knowledge. Subscriber mobile communication terminal comprising a PTT server for adding a group for each group to the group list set by the subscriber, and a PTT module for performing a PTT call-related operation including receiving and displaying the group list from the PTT server Characterized by including.

According to another aspect of the present invention, in a method for allocating a group of a mobile communication system employing a push to talk (PTT) method, a process of allocating a group for transmitting information and knowledge preset in a PTT server, Analyzing and registering each subscriber with a group for delivering information and knowledge according to the subscriber information, and adding a group for delivering information and knowledge to a group list set by each subscriber. It is done.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific details such as specific components are shown, which are provided to help a more general understanding of the present invention, and it is understood that these specific details may be changed or changed within the scope of the present invention. It is self-evident to those of ordinary knowledge in Esau.

1 is a schematic overall block diagram of a mobile communication system employing a Push To Talk (PTT) scheme according to an embodiment of the present invention. Referring to FIG. 1, a mobile communication system employing a PTT method first includes a plurality of base station transceivers which provide a mobile communication service by communicating with a plurality of mobile communication terminals 101, 102, and 103 located in a corresponding service area. System) 111 and 112 are provided. A plurality of base stations 111 and 112 are connected to a mobile switching center (MSC) 120 through a base station controller (BSC) 122, which is connected to a data network. It is connected to the PTT server 130.

The mobile communication terminals 101, 102, and 103 request call setup for voice or data services to the base stations 111 and 112, and transmit voice or data messages input from subscribers to the base stations 111 and 112 through a wireless section. And a voice or data message received from the base stations 111 and 112 to the subscriber. The base stations 111 and 112 receive call setup requests for voice or data services from the mobile communication terminals 101, 102, and 103 and request call setup from the MSC 120 through the BSC 112. The voice or data message received from the 101, 102, 103 is transmitted to the MSC 120, and the voice or data received from the MSC 120 is transmitted to the mobile communication terminals 101, 102, 103. The BSC 122 controls a plurality of base stations 111 and 112 to control call setup and data transmission between the MSCs 120. The MSC 120 receives the call setup request from the base stations 111 and 112 and inquires the location information of the called mobile communication terminal from the Home Location Register (HLR) to accommodate the called mobile communication terminal. Call setup is requested from the power station, and voice or data messages received from the base stations 111 and 112 are transmitted to the base station of the power station.

On the other hand, the PTT server 130 is responsible for the PTT subscriber group including mediation, maintenance and distribution of registration lists for each subscriber, call setup and separation of necessary systems and network resources, as well as overall control of the PTT subscriber group. Perform real time management operations. The PTT server 130 is a PoC (PTT over Cellular) server 132 performing a communication function for the PTT service in the mobile communication network, PTT subscriber information and group list of each subscriber (aka 'buddy list, buddy list) And a Group and List Management Server (GLMS) server 134 for managing the ""

The PTT server 130 also includes a PhD group management server 136 which assigns a subscriber group (aka 'doctor group') for professional information and knowledge transfer in advance in accordance with aspects of the present invention. The doctor groups assigned by the doctor group management server 136 are automatically added as shared groups shared by all subscribers, in addition to each subscriber's buddy list in each subscriber's buddy list. For example, the Ph.D. group management server 136 is a Ph.D. group and can assign various Ph.D. groups such as economy, health (medical), education, entertainment, entertainment, life, hobbies, computers, society, culture, sports, and travel. Can be. At this time, the doctor group of a particular item may have a plurality of groups. As such a doctor group is assigned, each PTT subscriber can register a member belonging to each doctor group by allowing the PTT subscriber to select whether or not to register with the corresponding doctor group when inputting his or her information upon initial membership. Of course, at this time, each PTT subscriber may later modify his information and register with the desired doctor group. Meanwhile, although the doctor group management server 130 is illustrated as being distinguished from the PoC server 132 and the GLMS 134 in FIG. 1, this is logically made to facilitate the explanation of the doctor group management server 136. In distinction, the functionality of such location-based server 136 may be performed in GLMS server 134 or the like.

Each of the mobile communication terminals 101, 102, and 103 includes a PTT module for performing a PTT related operation including a PTT call request to the PTT server 130, and a PTT call of a format appropriately set in advance when performing a PTT call. The request is wirelessly transmitted to the base stations 111 and 112. The MSC 120 provides a PTT call request from the mobile terminal 101, 102, 103 to the PTT server 130 through the base station 112, 112, which includes the PTT request. In order to process the data packet with the PTT server 130, IWF (Inter Working Function) is provided.

On the other hand, the user can access the PTT server 130 through the mobile communication terminal (101, 102, 103) to modify the group list information and personal information set by the user, such as new, change and delete. In addition, the user may access the PTT server 130 through the Internet using the PC 104, and modify the group list and personal information set by the PTT server 130.

Figure 2a is a block diagram of the overall block diagram of a PTT mobile communication terminal to which the present invention is applied, Figure 2b is an appearance structural diagram thereof. 2A and 2B, a mobile communication terminal to which the present invention is applied performs an interface operation with a user, and includes a speaker 251, a liquid crystal display (LCD) 252, a key input unit 254, a microphone ( A memory configured to store various operation programs and operation-related data of the mobile communication terminal, including a user interface 250 including a user interface 250, an RF / IF processing unit 230 for performing a wireless signal processing operation, and a ROM and a RAM. A unit 220, a voice signal processor (CODEC) 240 for performing a voice signal processing operation, and a mobile station modem device (MSM: Mobile Station) for performing the functions of a modem and a central processing unit for controlling the entire mobile communication terminal. Modem) 210 is configured to include.

In more detail, the configuration and operation of the respective functional units, first, in the user interface 250, the microphone 256 converts the user's voice into an electrical signal during a telephone call to the voice signal processing unit 240, On the contrary, the speaker 251 receives the voice signal from the voice signal processor 240 and generates an audible sound according to the voice signal. The key input unit 254 includes a plurality of numeric / character keys for receiving numbers and letters, a plurality of function keys for performing a mobile communication function, and a dedicated PTT key 254a for performing a PTT function from a user. When there is an input of a specific key, the corresponding key input data is provided to the mobile station modem apparatus 210. Although FIG. 2A illustrates that the PTT key 254a is provided separately, one of the function keys conventionally provided as the PTT key may be used. The display unit 252, which is usually composed of an LCD, is composed of an LCD controller, a memory for storing image data, an LCD display element, and the like, and under the control of the mobile station modem apparatus 210, characters of information such as the current state of the mobile communication terminal and a user menu Display the display or background image. In this case, a touch screen 253 may be employed in the LCD of the display unit 252.

The RF / IF processor 230 includes an RF transmitter for up-converting and amplifying a frequency of a signal to be transmitted, an RF receiver for low noise amplifying and down-converting a received signal, and received from a mobile station modem apparatus 210. After converting the modulated signal into an intermediate frequency, it is converted into a high frequency (RF) signal and transmitted to the base station through an antenna.The mobile station modem receives the high frequency signal from the base station through the antenna and converts it into the intermediate frequency and baseband sequentially. To the device 210.

The voice signal processor 240, which is usually composed of an audio codec, converts an analog voice signal received from the microphone 256 into a digital signal PCM and sends it to the mobile station modem device 210, and receives the other party from the mobile station modem device 210. The digital signal PCM of the voice is converted into an analog signal and the speaker 251 is transmitted. Although the voice signal processor 240 is separately illustrated as a block, the voice signal processor 240 may be configured to be included in the mobile station modem apparatus 210 in a single chip.

The mobile station modem apparatus 210 performs the angular function of the mobile communication terminal according to the key data input from the key input unit 254, and displays information such as the current status and the user menu according to the performance of the function through the display unit 252. Be sure to In particular, when processing a voice signal for a telephone call, the PCM voice signal provided from the voice signal processor 240 is converted through channel coding and interleaving, modulated, and provided to the RF / IF processor 230. The voice signal provided from the RF / IF processor 230 is generated as a PCM voice signal through demodulation, equalization, channel decoding, and deinterleaving, and then the voice signal processor 240 is generated. Send to. In addition, the mobile station modem apparatus 210 is provided with a PTT module for performing a PTT service, and performs the PTT call operation according to the characteristics of the present invention. In particular, according to a feature of the present invention, it is possible to perform an advertisement transmission operation to subscribers of the d location-based group.

Referring to the operation of the mobile communication terminal having the configuration as shown in Figures 2a, 2b, when the user performs the dialing operation using the key input unit 254, and set the dialing mode, the mobile station modem device 210 After sensing and processing the dial information, the RF / IF processor 230 converts the radio signal into a wireless signal and outputs the converted signal. Thereafter, the response signal of the counterpart subscriber received through the RF / IF processing unit 230 is a voice call path to output the voice signal processing unit 240 to the speaker 251 to perform a communication function. In the incoming mode, the mobile station modem apparatus 210 detects the incoming mode through the RF / IF processor 230 and generates a ring signal through the voice signal processor 240. Afterwards, the mobile station modem apparatus 210 detects the user's response and performs a communication function by forming a voice call path through the voice signal processor 240. In the outgoing and incoming modes, voice communication is described as an example. In addition to the voice communication, a data communication function for communicating packet data and video data and a PTT call operation according to input of a PTT key are similarly performed.

3 is a flowchart illustrating an exemplary PTT call connection operation in the mobile communication system of FIG. 1. Referring to FIG. 3, first, a user who wants to perform PTT communication inputs a PTT key provided in a mobile communication terminal (terminal A in the example of FIG. 2), or operates a PTT call function through a menu setting operation. In step 301, the PTT application is driven to transmit the PTT connection request message to the PTT server through the wireless network. After receiving the PTT connection request message, the PTT server checks the user through the GLMS server, and then, in step 304, the PTT server approves the PTT connection request of the user and transmits a buddy list of the PTT call group subscriber information of the user. In step 305, the mobile station modem apparatus receiving the buddy list is displayed on the display unit in a proper form. By checking the displayed buddy list, the user can select a subscriber who wants to make a PTT call by using an appropriate direction key. In step 307, the mobile communication terminal (terminal A) manipulates the selection of the subscriber who wants such a PTT call from the user. In step 309, a message (called 'INVITE') requesting a PTT call to the selected subscriber is transmitted to the PTT server through the wireless network. The PTT call request message (INVITE) includes information on the ID of the calling party and the receiving party.

When the mobile communication terminal (terminal A) transmits the PTT call request message (INVITE) to the PTT server in more detail, first, the mobile communication terminal (terminal A) requests the PTT call in the form of a short data burst (SDB). A message (INVITE) is transmitted to a base station connected to a corresponding terminal, and then a traffic channel (TCH) setup is performed while performing a service option (SO_PTT) negotiation with the corresponding base station for a PTT service. . Here, the Nego is a process of preparing a higher network session from the physical layer to the application layer including a PPP session (session).

The PTT call request message (INVITE) transmitted to the base station is then transmitted to the PTT server, the PTT server checks the calling party ID in the corresponding PTT call request message (INVITE) and then the calling mobile terminal through the wireless network in step 311 The PTT call request message (INVITE) is transmitted to the (terminal B). The receiving mobile terminal (terminal B) receiving the PTT call request message (INVITE) then informs the user of the reception of the corresponding PTT call request message (INVITE) through the display of the appropriate alarm sound and the notification message in step 313. do.

311 and 313 will be described in more detail, the PTT server transmits the PTT call request message (INVITE) to the base station that the destination mobile terminal (terminal B) is in service. The base station periodically transmits a paging signal (General Page) to the called-side mobile communication terminal (terminal B), and the called-side mobile communication terminal (terminal B) sends a page response to the paging signal to the base station. Sending During this paging, the base station transmits a PTT call request message (INVITE) in the form of SDB to the called-party mobile communication terminal (terminal B). Then, the called-party mobile communication terminal informs the called party that the PTT call request message (INVITE) has been received. At this time, the called-party mobile communication terminal (terminal B) transmits a signal indicating that the PTT call request message (INVITE) has been normally received to the base station.

On the other hand, the user who knows the reception of the PTT call request message (INVITE) in step 313 may allow the corresponding PTT call request through the operation of the appropriate key, the destination mobile terminal (terminal B) is the user in step 314 Receives a key operation allowing the PTT call request from the user, and in step 315 transmits a message indicating the permission of the PTT call request to the PTT server via the wireless network, the PTT server in step 317 to the calling mobile terminal (A Terminal) to inform that the PTT call request is allowed, and then a PTT call is made between both terminals.

In more detail with reference to the steps 315 and 317, when the PTT call request is allowed, the called-party mobile communication terminal (terminal B) transmits a PTT call request permission message (also called '200 OK') to the corresponding base station in the SDB form. Thereafter, the called-party mobile communication terminal (terminal B) performs a traffic channel setup while interworking with the corresponding base station to perform service option negotiation for the PTT service. The PTT call request permission message 200 OK transmitted to the base station of the called-party mobile communication terminal (terminal B) is transmitted to the calling mobile terminal (terminal A) through the PTT server and the corresponding service base station. The calling mobile terminal (terminal A) receiving the allow message 200 OK completes the traffic channel setup. At this time, the calling mobile terminal (terminal A) displays a message indicating that the called party allows the PTT call request through the display unit to inform the user.

In the subsequent PTT call between the two terminals, a specific mobile communication terminal (terminal A) sends a message requesting a right to speak, aka "Session Initiation Protocol (SIP) Ack" to the PTT server to request a right to speak. By controlling the talk right request between terminals, the talk right is granted to an appropriate mobile communication terminal, and the mobile communication terminal having the right to speak transmits talk burst to the PTT server in real time through the RTP (Real Time Protocol). The server first buffers the statement and then transmits it through the RTP to the mobile terminal.

4 is a flowchart illustrating a PTT call operation in the mobile communication system of FIG. 1. Referring to FIG. 4, in a state in which a subscriber's mobile communication terminal (terminal A) is connected to a PTT server, the subscriber of the mobile communication terminal checks a buddy list displayed on the terminal and operates a desired direction key. Request a list of doctoral groups. The request information for the doctor group list is transmitted to the PTT server (doctor group management server) in step 401, accordingly, the PTT server transmits the doctor group list to the corresponding mobile communication terminal (terminal A) in step 403. The mobile communication terminal (terminal A) receiving the doctor group list is displayed in an appropriate form through the display unit, and the user checks the displayed doctor group list and corresponds to information or knowledge desired by the user using the arrow keys. The doctor group can be selected, and the mobile communication terminal (terminal A) is manipulated by the user in step 405 to select the desired doctor group (a doctoral group B is selected in FIG. 4 as an example).

 Subsequently, the subscriber of the mobile communication terminal inputs his inquiry in the form of IM (Instant Messaging) data to the selected doctor group (Doctor B group), which is transmitted to the PTT server in step 407. In step 409, the PTT server checks the currently registered subscriber mobile communication terminal of the corresponding doctor group, and subsequently transmits the IM data to all mobile communication terminals of the corresponding doctor group in step 411. Accordingly, the subscriber of the doctor group (Doctor B group) who has confirmed the IM data transmits a PTT call request message (INVITE) to the subscriber, and then the subscriber and the IM of the doctor group through the process as shown in FIG. PTT call connection is established between subscribers who send inquiries through (Questioner), the questioner can obtain the appropriate information or knowledge from the subscribers of the relevant doctor group.

On the other hand, in the above PTT mobile communication system according to the present invention, the interrogator can perform an appropriate operation to evaluate the subscriber of the doctor group when the PTT call is terminated between the subscribers of the doctor group, each doctor group The information on the evaluation result can be accumulated and stored in the subscriber information. In this case, when the subscriber information of each doctor group is displayed on the doctor group list, the information on the evaluation result may be added and displayed in an appropriate form. In this case, the interrogator may directly request a PTT call individually by selecting a subscriber having a good evaluation result from the doctor group list.

As described above, a mobile communication system employing a push-to-talk method and a group assignment operation according to an embodiment of the present invention can be made. Meanwhile, the above-described description of the present invention has been described with reference to specific embodiments. It may be practiced without departing from the scope of the invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but by the claims and equivalents of the claims.

As described above, the mobile communication system adopting the PTT scheme and the group assignment operation according to the present invention can easily provide various information and knowledge to the subscriber with simpler configuration and operation.

Claims (4)

In a mobile communication system employing a push to talk (PTT) method, Performs overall control of the PTT subscriber group and real-time management of the PTT subscriber group, manages the information of the PTT subscriber and the group list set by each subscriber, and assigns a group for delivering preset information and knowledge to each subscriber. A PTT server that registers with the group for information and knowledge delivery according to the information, and adds the group for information and knowledge delivery to a group list set by each subscriber; And a subscriber mobile communication terminal having a PTT module for performing a PTT call related operation including receiving and displaying the group list from the PTT server. The PTT server of claim 1, wherein the PTT server performs a communication function for a PTT service in a mobile communication network, and GLMS (Group and Group) for managing information of the PTT subscriber and a group list of each subscriber. A list management server) and a group for pre-configuring information and knowledge delivery, and registering the information and knowledge delivery group according to the information of each subscriber, and registering the group for information and knowledge delivery. Mobile communication system comprising a doctor group management server to add to the group list set by the. In a group assignment method of a mobile communication system employing a push to talk (PTT) method, In the PTT server, the process of allocating a group for pre-set information and knowledge transfer, Analyzing each subscriber's information and registering each subscriber with a group for delivering the information and knowledge according to the subscriber information; And adding the group for the information and knowledge transfer to a group list set by each subscriber. The method of claim 3, When there is a request for selection of a group for transmitting the information and knowledge and a request for transmitting Instant Messaging (IM) data from the subscriber mobile communication terminal, the IM data is sent to the subscriber mobile communication terminal corresponding to the group for the information and knowledge transmission. Group assignment method further comprising the step of transmitting.

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