KR20000047231A - Method for processing exceeding message queues of central station in multimedia satellite communication system - Google Patents

Abstract

PURPOSE: A method for processing the exceeding message queues of a central station in the multimedia satellite communication system is provided so as to maintain the normal operation of the system by preventing the exceeding conditions of message queues. CONSTITUTION: An IP(Internet Protocol) switch(10), connected with a domain name system server, E-mail server, a web server, a proxy server, a multimedia service provider and a router, switches an IP packet. A transmitting data processing unit(11) generates an MPEG-2 TS packet by processing the transmitting data inputted from the IP switch(10). A modulation unit(12) carries out QPSK(Quadrature Phase Shift Keying) modulation for the TS packet outputted from the transmitting data processing unit(11) and outputs an intermediate frequency signal of 70 megahertz. An RF unit(13) carries out frequency up conversion and high power amplification processing for the intermediate frequency signal.

Description

Excessive Message Queue Processing Method of Central Station in Multimedia Satellite Communication System

The present invention relates to a method for processing a message queue of a central station in a multimedia satellite communication system. In particular, a system can be prevented by preventing a transient state of a message queue generated by a large number of instantaneous messages or failure to process a received message normally during system operation. The present invention relates to a method for processing excessive message queues of a central station in a multimedia satellite communication system that is capable of continuously performing normal operations without being down during operation.

1 is a block diagram showing the overall system configuration of a multimedia satellite communication system.

In FIG. 1, reference numeral 1 denotes a central station connected to the Internet, which provides various multimedia services to terminal stations, and performs overall network operation management and control functions. In addition, reference numeral 3 is a terminal station antenna, 4 is a set top box as a terminal station providing multimedia services to a general subscriber, 5 is a personal computer as a terminal for a user to perform multimedia communication, and 6 is a satellite. to be.

In other words, in the multimedia satellite communication system having the above-described configuration, the central station 1 transmits various satellite resource information required when the set-top box 4 requests access, for example, a CDMA for transmitting a control message to the central station 1. An information service providing a PID for an information service for receiving code and channel frequency data and all set top boxes 4 in common is executed.

On the other hand, in the set-top box (4) stores the service information transmitted from the central station 1, that is, CDMA code data, channel frequency data, and information service PID used when requesting a call connection to the central station (1). do.

When the access request for the Internet, that is, the call connection request, is input from the personal computer 5 in the above-described state, the set-top box 4 receives the subscriber information input from the computer 5, namely, the subscriber ID, password, After generating a predetermined control message based on the subscriber address or the like, the access request is executed to the central station 1 by allocating CDMA code data and channel frequency data.

Subsequently, when the access request is input through the above-described process, the central station 1 first compares the subscriber's IP and password included in the control message with the subscriber's information to determine whether the current access request is a legitimate subscriber. If it is determined that the user is a legitimate subscriber, the database is searched to determine whether there is a PID that is currently available, and the satellites, ie control PID, traffic PID, channel frequency, and CDMA code, are allocated to the set-top box 4.

In the set top box 4, the control PID and the traffic PID assigned by the central station 1 are set, and the CDMA code and channel frequency data transmitted from the central station 1 are allocated. Then, the personal computer 5 is informed that the call connection is successful.

Subsequently, when the IP packet for transmitting to the Internet from the personal computer 5 is input, the corresponding traffic data is transmitted to the central station 1, and when the central station 1 receives the traffic data from the set-top box 4, It is converted into an IP packet and sent to the Internet.

On the other hand, when the central station 1 receives the message or control data from the set-top box 4 as described above, to control the respective sub-system to send the received data to the corresponding subsystem or to the set-top box (4) When the message is sent, it is converted into a message that can be processed between internal processors and transmitted or received through the message queue to each corresponding subsystem.

However, as described above, many messages are momentarily received during system operation such as transmitting and receiving data from the set-top box 4 to the central station 1, or the received message queue cannot be processed at a normal processing speed. (Full), the processor hangs up, that is, the processor to be processed is abnormally operating, but the processing request message is continuously received to generate a system resource binding state.

Therefore, the processor in the system of the central station 1 is in a hang-up state, causing a problem of lowering the efficiency of system operation in which the system is down.

Accordingly, the present invention was created in view of the above circumstances, and in the multimedia satellite communication system, the central station checks the buffering state of the message queue and notifies the operator when the threshold is exceeded, and limits the received message queue. The purpose of the present invention is to provide an excessive message queue processing method of the central station in the multimedia satellite communication system that can prevent the system from being down during operation.

1 is a block diagram showing the overall system configuration of a multimedia satellite communication system.

2 is a block diagram showing the configuration of a central station 100 for executing an excessive message queue processing method in a multimedia satellite communication system according to a first embodiment of the present invention.

3 is an operation flowchart for explaining an excessive message queue processing method in a multimedia satellite communication system according to a first embodiment of the present invention;

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

1: central station 2, 3: antenna

4: set top box 5: personal computer (PC)

6: satellite 10: IP switch

11 transmission data processing device 12 modulation device

13 RF device 14 Demodulation device

15: CDMA receiving device 16: Receiving data processing device

17: central international language processor 18: network management system (NMS)

19: Database 20: Message queue storage unit

In the multimedia satellite communication system according to the present invention for realizing the above object, an excessive message queue processing method of a central station allocates and connects satellite resources to a set-top box requiring access, and stores the received message queue data thereafter. In the multimedia satellite communication system having a central international language processor for reading and processing the stored message queue data, the message queue receiving step of determining whether there is received message queue data, the threshold value of searching and storing the state of the message queue Message queue storage limit judging step to determine whether or not to exceed, transient status message sending step to generate and send a control message to inform excessive status when the message queue storage exceeds the limit, access request reception to determine whether an access request message is received Decision phase, a message indicating that access is not available Call connection restriction step of restricting call connection by sending a message, transient processing step of preferentially processing stored message queue data, and release of call connection restriction when it becomes buffered by processing excessive message queue storage state. And a normal execution step of the communication service for processing while storing the received message queue.

That is, according to the present invention having the above-described configuration, when the central international language processor reaches a limit in receiving, buffering, and processing a large number of message queues, the communication service is limited by executing communication service by limiting communication and first processing an excessive state. This can be prevented from going down.

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

2 is a block diagram showing the configuration of a central station 100 for executing an excessive message queue processing method in a multimedia satellite communication system according to a first embodiment of the present invention.

In FIG. 2, reference numeral 100 denotes a central station for executing and controlling an excessive message queue processing method according to the present invention, and 10 denotes an IP switch for switching an Internet Protocol packet, which is not shown in this IP switch 10. Domain Name System (DNS) server, E-mail server, Web (WEB) server, proxy server, multimedia service provider (MSP), router, etc. are combined to send and receive data from multimedia service network. In particular, the router performs connection processing between the central station 100 and the Internet, which converts an IP packet input from the Internet into the central station 100 into data of an Ethernet frame, and transfers the data from the central station 100 to the Internet. The outgoing Ethernet frame is converted into an IP packet.

In the figure, reference numeral 11 denotes a transmission data processing apparatus which processes transmission data input from the IP switch 10 to generate, for example, an MPEG-2 TS packet, and 12 denotes an output from the transmission data processing apparatus 11. A modulator for outputting an intermediate frequency signal of, for example, 70 MHz by performing quadrature phase shift keying (QPSK) modulation on TS packet data, and a 13 frequency upconverting and high output amplifying an intermediate frequency signal output from the modulator 12. It is an RF device for outputting to the antenna (2), the high-frequency signal received through the antenna (2) down-frequency conversion and low noise amplification output.

In the figure, reference numeral 14 denotes a demodulation device for demodulating an intermediate frequency signal input from the RF device 13, and 15 denotes CDMA demodulation of CDMA modulated data input by frequency demodulation in the demodulation device 14. A CDMA receiving device for outputting packet data, 16 is a receiving data processing device for processing data input from the CDMA receiving device 15, wherein the receiving data processing device 15 is an IP packet data from the set-top box (4) If the control message is received or converted to the data of the Ethernet frame is input to the IP switch 10. In addition, the reception data processing device 16 converts, for example, 100 baseT, that is, 100 Mbps data input from the CDMA reception device 15 into 10 baseT data and inputs the data to the IP switch 10.

In the figure, reference numeral 17 controls the entire apparatus of the central station 100, and stores the message queue data received through the IP switch 10 in the message queue storage unit 20 to be described later. A central international language processor that reads and processes stored message queue data, 18 is a network management system for operating and managing an entire satellite network by a system operator, and 19 is a PID and frequency allocable to the set-top box 4. It is a database that stores data and CDMA code data, as well as billing information for subscribers.

Reference numeral 20 denotes a message queue storage unit in which received message queue data are sequentially stored according to the priority given by the central international language processor 17.

Next, the operation of the apparatus according to the present invention having the above-described configuration will be described with reference to the operation flowchart shown in FIG.

First, the central international language processor 17 of the central station 100 is a CDMA for transmitting control messages to various satellite resources, such as the central station 100, which are required when the set-top box 4 requests access to the central station 100. Code, channel frequency data, and PID are assigned to the set top box (4).

That is, an Ethernet frame including the CDMA code, channel frequency data, control PID, and traffic PID is generated and transmitted to the transmission data processing apparatus 11 through the IP switch 10.

Subsequently, the transmission data processing apparatus 11 converts the Ethernet frame transmitted from the IP switch 10 into an IP packet and converts it into a TS packet, and transmits the TS packet to the modulator 12 and the RF device 13. It is transmitted to the set-top box (4) through.

In the set top box 4, the CDMA code data and the channel frequency data transmitted from the central station 100 are received and stored, and the control PID and the traffic PID are registered in the apparatus.

Therefore, when satellite resources are allocated to the set-top box 4 as described above and the message data can be transmitted / received (step ST1), a control message or the like is transmitted from the set-top box 4. The control message sent from the set top box 4 is input to the demodulation device 14 through the RF device 13, and is input to the reception data processing device 16 through the CDMA receiving device 15. Then, the reception data processing device 16 generates an Ethernet frame based on the control message and applies it to the central international language processor 17 through the IP switch 10 in FIG. 2.

Subsequently, when the message queue data is received through the above-described process or the message queue data is received from another subsystem (step ST2), the central international language processor 17 first searches for the message queue storage unit 20 and stores the message queue data. It is determined whether the threshold has been exceeded (step ST3). That is, if the limit of data that can be stored in the message queue storage unit 20 is 80% or more, the central international language processor 17 is set to have difficulty in reading and processing data.

Therefore, if the message queue data stored in the message queue storage unit 20 exceeds its limit (step ST4), the central international language processor 17 generates a control message for notifying that the message queue processing is in an excessive state. The data is sent to the network management system 18 through step 10 (ST5 step).

Further, the central international language processor 17 determines whether there is a reception of a message relating to an access request (step ST6), and generates a control message informing that access is not possible if there is a reception of the message queue data relating to the access request. Then, it is sent to the transmission data processing apparatus 11 through the IP switch 10 and transmitted to the set-top box 4 requesting the corresponding access (ST7 step).

Then, the central international language processor 17 sequentially reads the message queue data stored in the message queue storage unit 20 one by one and performs the corresponding control process (step ST8).

As described above, when the message queue data stored in the message queue storage unit 20 is processed and its storage state becomes a bufferable state capable of storing other message queue data (step ST9), the central international language processor 17 then executes. While storing the received message queue data in the message queue storage unit 20, a control process corresponding to the contents of the stored message queue data is performed (step ST10).

That is, according to the above embodiment, when excessive message queue buffering occurs in the central station, the system can be quickly processed to prevent the system from going down.

In addition, this invention is not limited to the said Example, It can variously deform and implement within the range which does not deviate from the technical summary of this invention.

As described above, according to the present invention, when an excessive message queue buffering state is generated in a multimedia satellite communication system, communication is limited and priority processing is performed to prevent the system from being down during a communication service.

Claims (1)

In a multimedia satellite communication system having a central international language processor which allocates satellite resources to a set-top box that requires access and connects them, stores the received message queue data, and reads and processes the stored message queue data. , Message queue receiving step of determining whether there is received message queue data, Message queue storage limit determination step of retrieving whether the message queue has been stored to determine whether the storage limit has been exceeded, Transient status message sending step of generating and sending a control message informing the excessive state when the storage of the message queue exceeds the limit, An access request receiving step of determining whether an access request message is received; Call connection restriction step of restricting call connection by sending a message indicating that it is not accessible; Transient processing step of preferentially processing the stored message queue data, The central station in a multimedia satellite communication system comprising a normal service step of releasing the call connection restriction and storing and processing the received message queue when the storage state of the excessive message queue becomes buffered. Excessive message queue handling.