KR20060039385A - Ptx service system and method - Google Patents

Abstract

The present invention relates to a method of reducing media data latency time by reducing the amount of media traffic unnecessarily generated in a network section during PTx. In order to reduce the amount of media traffic, when server 1 receives data, server 1 stores the received data and transmits it to server 2 performing a control function, and server 2 sends the received data to the target client of its own area. The method of transmitting the stored data to the target clients by transmitting a command signal for transmitting the previously stored data to the target client to the server 1 is described.

Push-To-Talk, Push-To-View, PTx

Description

PT Service System and Method {PTx SERVICE SYSTEM AND METHOD}

1 is a network configuration diagram of a general PTx service system.

2 is a signal flow diagram illustrating a conventional media data transmission method.

3 is a diagram showing the structure of a PTx service server according to the present invention;

4 is a signal flow diagram illustrating a media data transmission method according to the present invention;

*** Explanation of symbols for main parts of drawing ***

10: Function unit 20: Static Database unit

30: storage unit 40: communication unit

The present invention relates to a Push-To-Talk (Push-To-Talk, Push-To-View) service, and more particularly, to data transmission of a PTx service.

PTx service provides a server such as push to talk (PTT) for transmitting a call service by transmitting voice data, push to view (PTV) for transmitting video data, and push to data (PTD) for transmitting various data. Among the clients that have established sessions through this, one client assigned with a talk right or a transmission right transmits media data including voice or video, and the other clients participating in the session collectively refer to a half-duplex communication service that receives the media data.

PTx service performs communication without dialing, waiting for phone connection, ringing tone, and so on. It is a big advantage to connect immediately and quickly than general mobile communication service. In addition, the user's voice and data can be transmitted to one user (one-to-one) or to multiple users (one-to-many) through a group conversation session.

1 is a network configuration diagram of a general PTx service system.

As shown in Fig. 1, the PTx service system is composed of two networks (Network A and Network B), and three PTx clients are located in the service area of Network A, and six PTx clients are located in the service area of Network B. Assume it is located.

In addition, it is assumed that the server A that performs the partitioning PTx function exists in the network A, and the server B that performs the partitioning PTx function and the controlling PTx function exists in the network B.

Communication between the PTX client and the server or between the servers is performed through a bearer packet network. For example, a 3GPP General Packet Radio Service (GPRS) network and a 3GPP2 PDSN (Packet Data Serving Node) network correspond to the bearer packet network.

The partitioning PTx function is a kind of processor created in the server as the PTx client connects to the server, and the number of clients connected is present.

The partitioning PTx function performs policy enforcement for PTx session handling and incoming PTx sessions. Between the PTx client and the server performing the controlling PTx function, the media traffic or Talk-Burst control message is relayed.

The controlling PTx function performs central PTx session processing, media distribution, policy enforcement, talker identification, and participant information for participation in group sessions. As such, since the controlling PTx function plays a central role of the PTx service, the media data generated in the network is transmitted to the target clients through the server executing the controlling PTx function.

2 is a signal flow diagram illustrating a conventional media data transmission method.

Assume that three clients (PTx clients a, b, c) are located in the service area of Network A, and six clients (PTx clients A, B, C, D, E, and F) are located in the service area of Network B. do.

As shown in FIG. 2, the media data transmitted by PTx client a in the network A area is transmitted to server A through a bearer packet network (S10 and S20).

The server A has three partitioning PTx functions (F1, F2, F3), and these partitioning PTx functions (F1, F2, F3) are clients belonging to the network A area (PTx client a, b, c) media traffic and Talk-Burst control message transmission is relayed respectively. The partitioning PTx function F1 transmits the media data received from the server A to the controlling PTx function existing in the server (server B) of the network B.

The media data transmitted from the partitioning PTx Function (F1) is transferred to the controlling PTx Function of the server B through the bearer packet network (S30 to S50), and the controlling PTx Function checks the destination information of the delivered media data. The media data destinations are PTx clients b, c, A, B, C, D, E, and F.

After confirming the destination information of the media data, the controlling PTx function transmits the media data to PTx clients belonging to the network B region (S100). When delivered to PTx Function (F4, F5, F6, F7, F8, F9), the delivered media data is PTx client A, B, C by partitioning PTx Function F4, F5, F6, F7, F8, F9 Transmitted as D, E, and F respectively.

The controlling PTx function also transmits the media data to PTx clients (PTx clients b and c) belonging to the area of network A. The media data transmitted by the controlling PTx Function is transferred to the party-facing PTx Function (F1) of the server A through the bearer packet network (S60 to S80), and the PTx client is again by the partitioning PTx Function (F1). Sent to b and c. (S90)

When transmitting the media data to PTx clients belonging to the network A area, the controlling PTx function repeatedly transmits the media data by the number of recipients (twice) belonging to the network A area. One transmits for PTx client b and the other transmits for PTx client c.

Above, the conventional media data transmission method described

When the media data is transmitted to PTx clients (PTx clients b and c) belonging to the network A area, the controlling PTx function transmits the entire media data, and the media data as many as the number of recipients belonging to the network A area. Because of the repetitive transmission, it increases the amount of unnecessary media traffic on the network and reduces the quality of PTx service. In addition, as the amount of media traffic increases, the latency time of media data also increases.

The present invention is to solve the problems described above, the object is,

PTx service system that reduces unnecessary data traffic on network by replacing media data between PTx server A which performs repeated patting PTx function and server B which performs control PTx function with command signal To provide a method.

In order to achieve the above object, the PTx server according to the present invention is characterized in that when the data of the client is received, stores the received data, and then transmits the data to the PTx server performing the control function.

Preferably, the PTx server includes a static database unit for storing list information of group members required for PTx service or policy information applied to PTx service; A storage unit for storing the received data for a predetermined time; A function unit comprising a partitioning PTx function or a controlling PTx function and controlling data transmission based on the information of the static database unit; Under the control of the function unit, it is characterized by consisting of a communication unit responsible for signaling and data transmission with the external device.

Preferably, when the PTx server receives a predetermined command signal from the PTx server performing the controlling PTx function, the PTx server transmits the data stored in the storage unit to each target client in its area. At this time, the destination client refers to clients belonging to its own network among clients included in an invitation message of the client that transmits data.

Preferably, the command signal includes an RTP sequence number; An address of a storage unit in which the data is stored or location information in the storage unit; An identification number of the PTx session set in the client; Information indicating whether transcoding is required; Information indicating whether a translation is required; And information required by the server and information of clients belonging to the server.

Preferably, the command signal further includes CODEC information when the information is set to require transcoding.

Preferably, the command signal may further include bit rate information when the information is set to require translation.

In order to achieve the above object, PTx service system according to the present invention,

When a command signal for instructing data transmission is received from a PTx server performing a control PTx function, the PTx server includes a PTx server for transmitting data of the client stored in the storage means to each target client in its own area.

In order to achieve the above object, the media data transmission method of the PTx service system according to the present invention,

When the server 1 receives the data of the client, storing the received data and transmitting the received data to the server 2 performing the control function; Transmitting, by the server 2, the data to the destination client of its own area, the predetermined command signal to the server 1; The server 1 receives the command signal and transmits the stored data to the respective target clients of its service area.

In order to achieve the above object, the media data transmission method of the server to the PTx service system according to the present invention,

Receiving data from the client, storing the received data and transmitting the received data to the server 2 which performs the control PTx function; When a predetermined command signal instructing data transmission is received from the server 2, the stored data is transmitted to the respective target clients in its service area.

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

3 is a diagram showing the structure of a PTx service server according to the present invention.

As shown in FIG. 3, the PTx service server (Server A & Server B) according to the present invention is composed of a function unit 10, a static database unit 20, a storage unit 30, and a communication unit 40. do.

The function unit 10 is a device constituted by a partitioning PTx function and a control PTx function, and in some cases, includes only the partitioning PTx function or includes both the partitioning PTx function and the controlling PTx function. It is configured by.

The function unit provided in the server A is composed of three partitioning PTx functions (F1, F2, F3), and the function unit provided in the server B includes six partitioning PTx functions (F4, F5, F6, F7, F8, F9) and one control PTx Function.

The static database unit 20 may include list information of group members required for the PTx service or policy information applied to the PTx service, for example, the maximum number of persons who can participate in the PTx session or the time when one person can speak at a time. Stores static information.

The storage unit 30 is a storage means for storing the received media data (voice, text, video, etc.) for a certain period of time. When the media data is received from the PTx client, the server A transmits the received data to a server (for example, server B) that performs the controlling PTx function, and stores the received data in its storage unit 30 for a predetermined period of time.

The communication unit 40 is a device that is responsible for signaling and media data transmission. The server performs signaling through the communication unit 40 to bearer packet networks, PTx clients, and other servers, and transmits and receives media data.

4 is a signal flow diagram illustrating a method of transmitting media data according to the present invention, wherein PTx clients (clients b, c, A, B, C) having different media data (voice, text, image, video, etc.) of PTx client a are shown in FIG. , D, E, and F).

As shown in Fig. 4, the media data transmitted by PTx client a in the network A area is transferred to server A through the bearer packet network (S210, S220).

The PTx server A performing the partitioning PTx Function F1 transmits the received media data to the PTx server B performing the controlling PTx function, and also stores the received media data in the storage unit 30 (S230).

The media data transmitted from the PTx server A performing the partitioning PTx function F1 is transferred to the PTx server B performing the controlling PTx function through the bearer packet network (S240 to S260), and the control PTx function is transmitted. The PTx server B performs checks the destination information of the transmitted media data (known at the time of session setup before the controlling PTx function receives the media data), and the destination of the media data is PTx clients b, c, A, B, Check for C, D, E, and F.

After checking the destination information of the media data, the PTx server B performing the control PTx function transmits a predetermined command signal to the PTx server A performing the partitioning PTx function F1 (S270 to S290). Instructs PTx clients b and c to transmit media data of PTx client a. At the same time, the media data is also delivered to its own partitioning PTx function (F4, F5, F6, F7, F8, F9), and the media data is PTx clients A, B, C, D, E, and F. To be delivered to (S310).

The PTx server B performing the controlling PTx function basically transmits the command signal and the media data at the same time, but in some cases, the command signal and the media data may be divided and transmitted.

The PTx server B performing the conventional controlling PTx function repeatedly transmits the media data as many times as the number of recipients (twice) belonging to the area of the network A during the above steps (S270 to S290). Send only once. That is, when the PTx server B performing the controlling PTx function transmits a command signal, the PTx server A performing the partitioning PTx function F1 stores the media data stored in the storage unit 30 in the network A. Deliver to destination clients in the realm.

The predetermined command signal belongs to location information of media data, RTP sequence number, number of PTx session, information indicating whether or not transcoding is necessary (True / False), information indicating whether translation is required (True / False), PTx server A URI information, information for identifying PTx clients belonging to PTx server A in the corresponding PTx session (eg, synchronization source) and other information required by PTx server A are included.

The location information of the media data of the command signal is an address of a storage means in which media data is stored, and may be represented by an address value of a memory or a memory pointer. The number of the PTx session is an identification value of the session set for media data transmission of the PTx client a.

When the " information indicating whether transcoding is required " is set to True, that is, when transcoding is required, the command signal includes CODEC information. When the "information indicating whether translation is required" is set to True, that is, when translation is required, the command signal includes bit rate information. The predetermined command signal does not include media data received from the PTx server A performing the partitioning PTx function F1.

In step S240, the PTx server A performing the partitioning PTx Function (F1) transmits the media data to the PTx server B performing the controlling PTx function, and then performs the controlling PTx function for a predetermined time. Wait for the command signal from PTx server B. If the predetermined command signal is not received from the PTx server B performing the controlling PTx function until a predetermined time elapses, the media data stored in the storage unit 30 is discarded. However, if the command signal is received by the PTx server A performing the partitioning PTx function F1 before a predetermined time has elapsed, the media data stored in the storage unit 30 is transmitted to the PTx client b and the PTx client c. (S300)

As described above, when the PTx server A performing the partitioning PTx function transmits data of the client to the PTx server B performing the controlling PTx function, the present invention also transmits the data to the storage means of the server A. By storing the data, the data is transmitted to the receivers of the server A using a simple command signal of the PTx server B that performs the controlling PTx function.

As a result, the present invention reduces the amount of media traffic unnecessarily generated in the network section, improves the quality of PTx service, and greatly reduces the latency time of media data.                     

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (20)

When the data of the client is received, and stores the received data, and transmits to the PTx (Push-To-x) system that performs the control function. The method of claim 1, wherein the PTx system is A static database unit for storing list information of group members required for the PTx service or policy information applied to the PTx service; A storage unit for storing the received data for a predetermined time; A function unit comprising a partitioning PTx function or a controlling PTx function, the function unit controlling data transmission based on the information of the static database unit; A PTx service system comprising a communication unit for signaling and data transmission with an external device under the control of a function unit. The system of claim 1, wherein the PTx system is And receiving a predetermined command signal from a PTx system performing the controlling PTx function, and transmitting the data stored in the storage means to each target client in the area. The method of claim 3, wherein the command signal is An RTP sequence number; address of a memory in which data is stored or location information in the memory; An identification number of the PTx session set in the client; Information indicating whether transcoding is required; PTx service system comprising information indicating whether translation is required. The method of claim 1, wherein the data is PTx service system, characterized in that the media data. When a command signal indicating data transmission is received from a PTx system performing a control PTx function, the PTx system transmits the data stored in the storage means to the target client in the service area. When the server 1 receives the data of the client, storing the received data and transmitting the received data to the server 2 performing the control function; Transmitting, by server 2, a command signal to the server 1, wherein the data is a target client of its own area; And the server 1 receives the command signal and transmits the stored data to respective target clients in its service area. The method of claim 7, wherein the command signal is An RTP sequence number; address of a memory in which data is stored or location information in the memory; An identification number of the PTx session set in the client; Information indicating whether transcoding is required; A data transmission method comprising information indicating whether translation is necessary. The method of claim 7, wherein the data is Data transmission method characterized in that the media data. The method of claim 7, wherein the server 1 and server 2 Data transmission method characterized in that the PTx service. The method of claim 7, wherein the command signal is And a signal for transmitting the stored data to the destination client. Receiving data from the client, storing the received data and transmitting the received data to the server 2 which performs the control PTx function; And receiving a predetermined command signal instructing data transmission from the server 2, transmitting the stored data to respective target clients in its service area. The method of claim 12, wherein the data is Data transmission method characterized in that the media data. And storing the received data in a storage means, transmitting the received data to an external system, and transmitting the stored data to a destination client when receiving a command signal from the external system. The method of claim 14, wherein the data is PTx system, characterized in that the media data. 15. The method of claim 14, wherein the command signal is PTx system, characterized in that the signal for transmitting the stored data to the destination client. 15. The system of claim 14, wherein the external system is PTx system, characterized in that the system performing a control function. Transmitting data to the PTx server 1 by the client; Storing the received data by the PTx server 1 and transferring the received data to the server 2 performing the control function; The PTx server 2 transmitting the data to the destination client of its service area and the command signal to the server 1; PTx server 1 receives the command signal, and transmits the stored data to the target client of the service area of the PTx service. The method of claim 18, wherein the data is PTx service method characterized in that the media-data. The method of claim 18, wherein the command signal is An RTP sequence number; address of a memory in which data is stored or location information in the memory; An identification number of the PTx session set in the client; Information indicating whether transcoding is required; PTx service method comprising the information indicating whether the translation is necessary.

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