KR100264047B1 - Terminal station ID allocation method and device in multimedia satellite communication system - Google Patents

Abstract

PURPOSE: An apparatus and a method for assigning a terminal station ID in a multimedia satellite communication system are provided to accept a number of a terminal station subscriber at a time by a central station assigning different IDs to a terminal station. CONSTITUTION: In step ST1, data having CDMA(Code Division Multiple Access) code for initial access, channel frequency signal and PID(Packet IDentifier) for information service is constructed into TS(Transport Stream) packet and transmitted. In step ST2, a control processor of central station receives access request message data from a set-top box. In step ST3, it is determined whether a user requesting an access is authorized or not by comparing a subscriber's IP and password with information for subscribers stored in a database. If the user is authorized(step ST4), it is determined whether an available TID is present or not by searching the database, and TID for control, TID for traffic, a channel frequency and CDMA code are assigned to the set-top box(step ST5). In step ST6, a TS packet outputted from a PS(Private Section) packet generation part is modulated through a modulation device and transmitted to the set-top box via RF device. In step ST7, a TS packet data including the assigned terminal station ID is generated and transmitted to the terminal station requesting the access.

Description

Terminal station ID allocation method and device in multimedia satellite communication system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia satellite communication system capable of transmitting multimedia data such as image data to a satellite communication subscriber at high speed. Particularly, a plurality of terminal station subscribers are accommodated by assigning different IDs to terminal stations that require access. The present invention relates to a terminal station ID allocation method and apparatus in a multimedia satellite communication system.

This is a block diagram showing the overall system configuration of a multimedia satellite communication system that enables subscribers to receive multimedia data at high speed from the Internet or a multimedia service provider.

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.

That is, in the multimedia satellite communication system having the above-described configuration, since the amount of data received from the Internet is much larger than the amount of data transmitted through the Internet, the set-top box (4) from the central station 1 is considered in consideration of this point. In the case of forward link transmitting through a TDM method, a large amount of messages can be transmitted, and in case of a return link transmitting from the set-top box 4 to the central station 1, a plurality of subscribers Code Division Multiple Access (CDMA) scheme is used to accommodate this.

In addition, the central station 1 is coupled to the Internet based on TCP / IP, and transmits and receives various data with the Internet through an IP packet (Internet Protocol Packet). Then, for example, an MPEG-2 TS (Transport Stream) packet for a multimedia service is generated based on an IP packet for a subscriber received from the Internet, and the generated packet data is transmitted to the set-top box 4 through a TDM scheme. do. Then, the CDMA modulated data received from the set-top box 4 is received, the IP packet is generated based on this, and the IP packet is transmitted to the Internet.

On the other hand, the multimedia satellite communication system having the above configuration has been filed by the present applicant, the detailed configuration and description thereof will be omitted.

FIG. 2 shows the configuration of a transponder of the system, which has a frequency band f _A of 40 MHz for a forward link and a frequency band f _B of 40 MHz for a return link, for example. f _T ), for example, has a bandwidth of 80 MHz, and the return link is composed of a plurality of frequency channels f1 to fn with a bandwidth of approximately 1.5 MHz. For example, 64 CDMA codes are allocated to each of the frequency channels f1 to fn, and the central station 1 has a channel frequency for each set-top box 4 corresponding to each time the subscriber uses the Internet service. And a CDMA code are allocated to form a return link.

That is, referring to the operation of the multimedia satellite communication system having the above-described configuration, first, the central station 1 includes various kinds of information required when the set-top box 4 requests access to the central station 1, for example, the central station 1. An information service is provided which provides a CDMA code and channel frequency data for transmitting a control message and a PID for information service for common reception in all set-top boxes 4.

In addition, the information service described above is repeatedly executed at regular intervals, for example, when the number of TS packets transmitted from the central station 1 to the set top box 4 reaches 100.

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 2 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. do.

At this time, if it is determined that the user is a legitimate subscriber, the database is searched to determine whether there is a PID currently available, and the control top, traffic PID, channel frequency, and CDMA code are assigned to the set-top box 4. At this time, the information service PID is used as the PID of the TS packet transmitted 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 a call release request, i.e., an access release request is input from the personal computer 5, the set-top box 4 generates a control message for the call release request and sends it to the central station 1. Then, the central station 2 terminates the call processing for the subscriber by retrieving the control PID and the traffic PID allocated to the set top box 4 based on the input control message.

However, in the multimedia satellite communication system, the maximum number of subscribers is 50,000 subscribers, and the number of subscribers that can be accommodated simultaneously is divided into about 40 frequency channels as shown in the transponder shown in FIG. By assigning a CDMA code and PID to the subscriber, it can accommodate about 2,500 subscribers simultaneously.

However, the satellite communication system requires a function capable of accommodating not only the subscriber but also more and more subscribers at the same time.

Accordingly, the present invention was created in view of the above circumstances, and the multimedia station which transmits multimedia data to each terminal station can simultaneously accept a plurality of terminal station subscribers by assigning different IDs to the terminal stations. An object of the present invention is to provide a terminal station ID allocation method and apparatus in a satellite communication system.

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

2 is a diagram showing the configuration of a transponder of the multimedia satellite communication system of FIG.

3 is a block diagram showing the configuration of a central station 100 to which a terminal station ID assignment apparatus is applied in a multimedia satellite communication system according to an embodiment of the present invention.

4 is a block diagram showing the configuration of the transmission data processing apparatus 17 of FIG.

FIG. 5 is a memory map showing a memory configuration of the subscriber information storage unit 174 in FIG.

6 is a block diagram showing the configuration of the set-top box 4 in FIG.

7 is a data packet diagram showing the configuration of each data packet processed in the multimedia satellite communication system according to the present invention.

8 is a flowchart illustrating a terminal station ID allocation method in a multimedia satellite communication system according to an embodiment of the present invention.

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

1: central station 2, 3: antenna

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

6: satellite 10: IP switch

17: transmission data processing device 171: Ethernet interface

172: input buffer 173: IP packet controller

174: subscriber information storage unit 175: PS packet generation unit

176: TS packet generation unit 22: receiving data processing device

23: central international language processor 24: network management system (NMS)

25: database 31: RF device

32: tuner 33: demodulator

34: Demultiplexer (DMUX) 35: Network Interface Card (NIC)

36: transmission frame generator 37: CDMA channel transmitter

38: modulator 39: IF generator

40: Transmission timing generator 41: Data memory

42: processor

In the multimedia satellite communication system according to the present invention for realizing the above object, the terminal station ID allocation method is provided with a set-top box that executes traffic processing with the communication terminal connected to the overall control process of the device based on the assigned ID. In a multimedia satellite communication system, a common service information transmission step of transmitting a data composed of a CDMA code, a channel frequency signal, and a PID for information service using a TS packet, and transmitting subscriber data from the set-top box. An access request reception step for receiving an access control message, a legitimate subscriber determination step for determining whether a subscriber station subscriber requesting access is a legitimate subscriber, a PID corresponding to the subscriber IP, a control TID and a traffic TID, if determined to be a legitimate subscriber Terminal station ID assignment step to assign, including the assigned terminal station ID And generates a TS packet data to a data comprises a terminal station ID transmission step of transmitting an access request to the terminal station is characterized in that configured.

In addition, in the multimedia satellite communication system according to the present invention for realizing the above object, an apparatus for allocating a terminal station ID is a set-top box which executes traffic processing with a communication terminal connected to the overall control process of the apparatus based on a predetermined ID assigned thereto. In the multimedia satellite communication system provided, an IP switch for switching IP packet data and outputting the Ethernet frame data, an Ethernet interface for generating and outputting an IP packet based on the Ethernet frame input from the IP switch, and the Ethernet interface An input buffer that sequentially stores the IP packet data output through the input buffer, and determines the type of input data based on the header of the IP packet data stored in the input buffer, and controls the generation of the packet data based on the determined result. IP packet controller, PID corresponding to IP of each set-top box A subscriber information storage unit in which a control TID and a traffic TID are mapped and stored, a PS packet generation unit generating a PS packet based on data input from the IP packet controller, PS packet data input from the PS packet generation unit, and TS packet generation unit for generating and outputting TS packets based on the PID and TID applied from the IP packet controller and the traffic data stored in the input buffer, and modulating the TS packet data input from the TS packet generation unit to generate an intermediate frequency signal. A modulator for outputting a signal, an RF device for converting an intermediate frequency signal outputted from the modulator into a frequency up-conversion and amplifying a high output, and a TS packet configured to allocate an available TID when receiving an access request from the set-top box Assignable to the central international language processor and the set-top box that controls the generation and transmission of data It is characterized by including a database for storing one PID and TID, frequency data and CDMA code data.

That is, according to the present invention having the above-described configuration, when an access request is received from a set-top box, which is a terminal station, the central station reads a usable TID from a database to correspond to the IP of the set-top box requesting access, and the PID and control TID and traffic. TIDs are allocated, TS packet data including the same is generated, and transmitted to the set-top box.

Therefore, by assigning a TID to each set-top box, it is possible to accommodate many terminal stations.

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

3 is a block diagram of a central station 100 to which a terminal station ID allocation apparatus is applied in a multimedia satellite communication system according to an embodiment of the present invention.

In FIG. 3, reference numeral 100 denotes a central station to which a terminal station ID allocating apparatus according to the present invention is applied, and 10 denotes an IP switch for switching an IP packet. The IP switch 10 includes a DNS (Domain Name System). ) Server 11, e-mail server 12, web (WEB) server 13, proxy server 14, MSP (Multimedia Service Provider: 15), router (Router: 16), etc. To be combined. In this case, the MSP includes a home banking system, a home shopping system, a distance education system, a video conference system, and the like.

In particular, the router 16 executes 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 converts the data from the central station 100 to the Internet. Ethernet frame sent to IP packet is converted into IP packet.

In the figure, reference numeral 17 denotes a transmission data processing apparatus for processing transmission data input from the IP switch 10 to generate, for example, an MPEG-2 TS packet, and 18 is output from the transmission data processing apparatus 16. 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 19 converts the intermediate frequency signal outputted from the modulator 18 into frequency upconversion and high output amplification. 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 drawing, reference numeral 20 denotes a demodulation device for demodulating an intermediate frequency signal input from the RF device 19, and 21 denotes CDMA demodulation of CDMA modulation data input by frequency demodulation in the demodulation device 20. A CDMA receiving device for outputting packet data, 22 is a receiving data processing device for processing data input from the CDMA receiving device 21, wherein the receiving data processing device 22 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 22 converts, for example, 100 baseT, that is, 100 Mbps data input from the CDMA reception device 21 into data of 10 baseT, and inputs the data to the IP switch 10.

In the drawing, reference numeral 23 denotes a central international language processor that controls the entire apparatus of the central station 100, and also allocates the TID to the set-top box 4, the transmission channel frequency and the CDMA code for transmission. 24 is a network management system for the system operator to operate and manage the entire satellite network, 25 is a PID and TID, frequency data and CDMA code data that can be allocated to the set-top box 4, Database that stores billing information for subscribers.

4 is a block diagram showing the configuration of the transmission data processing apparatus 17. In the drawing, reference numeral 171 generates and outputs an IP packet based on the Ethernet frame input from the IP switch 10 described above. In addition, the Ethernet interface converts the data of 100 baseT inputted into the data of 10 baseT and outputs the data, 172 is an input buffer for sequentially storing the IP packet data output through the Ethernet interface 171, 173 is the input buffer The type of input data is determined based on the header of the IP packet data stored in 172, and based on the determined result, the packets of the PS packet generation unit 175 and TS packet generation unit 176 to be described later. Control to generate, and also control data applied from the Ethernet interface 171, for example, control input from the network management system 24 or the central international processor 23 of FIG. An IP packet controller for controlling a transmission data processing unit 17 based on the data. Although not specifically shown in the figure, the IP packet controller 173 checks the state of each component of the transmission data processing apparatus 17 and displays the state information in the central international language processor 23 or the network management system 24. Will be sent out.

In the drawing, reference numeral 174 denotes a subscriber information storage unit for storing a TID allocated for each set top box 4, which corresponds to the PID and the IP address of each set top box 4 as shown in FIG. The control TID and the traffic TID are mapped and stored.

In the drawing, reference numeral 175 denotes a PS packet generation unit for generating a PS packet (Private Section Packet) based on data input from the IP packet controller 173, and 176 is input from the PS packet generation unit 175. TS packet that generates and outputs an MPEG-2 TS packet based on PS packet data, TID (control TID, traffic TID) applied from the IP packet controller 176, and traffic data stored in the input buffer 172. It is a generator.

On the other hand, Figure 6 is a block diagram showing the configuration of the set-top box 4 in the multimedia satellite communication system.

In FIG. 6, reference numeral 31 denotes an intermediate frequency signal output from the intermediate frequency generator 39, which will be described later, in addition to receiving a high frequency signal transmitted from the central station 100, frequency downconverting, and amplifying low noise. An RF device for up-converting and amplifying high output, 32 is a tuner for outputting an intermediate frequency by frequency-changing a high frequency signal output from the RF device 31, and 33 is an intermediate frequency signal output from the tuner 32, that is, QPSK modulation. And a demodulation unit for demodulating the outputted signal as TS packet data.

In the drawing, reference numeral 34 denotes a demultiplexer for extracting a TS packet corresponding to the set-top box from the TS packet data output from the demodulator 33, which includes a register for storing TID information therein. The TID applied from the processor 42 to be described later is stored in the register. The TS packet including the TID stored in the register is extracted from the TS packets applied from the demodulator 33 and applied to the processor 42.

In the drawing, reference numeral 35 denotes a network interface card (NIC) that executes an interface with the personal computer 5, which converts an Ethernet frame applied from the processor 42 into an IP packet. In addition to the above), the IP packet applied by the personal computer 5 is converted into an Ethernet frame and applied to the processor 42.

In the figure, reference numeral 36 denotes a serial transmission data frame based on transmission data applied in parallel from the processor 42, and a transmission timing signal applied by the transmission timing generation unit 40 to be described later. And a transmission frame generator for sequentially outputting the transmission data frame. 37 denotes CDMA modulation by mixing the CDMA code applied from the processor 42 to the transmission data output from the transmission frame generation unit 36. A CDMA channel transmitter to be executed, 38 is a modulator for modulating and outputting data output from the CDMA channel transmitter 37, for example, QPSK, 39 is a modulator 38 based on frequency data applied from the processor 42 An intermediate frequency generator converts an output modulation signal into a predetermined intermediate frequency signal.

In the drawing, reference numeral 40 denotes a transmission timing generation unit for generating a transmission timing signal for the transmission frame generation unit 36 under the control of the processor 42, and 41 is an assignment from various data, especially from the central station 100. The control TID and the traffic TID are stored in the data memory.

In addition, reference numeral 42 denotes a processor for controlling the overall operation of the set-top box 4, which converts the TS packet for the personal computer 5 received from the demultiplexer 34 into an IP packet and converts the packet into an IP packet. In addition to the output box, data from the personal computer 5 input from the network interface card 35 is output to the transmission frame generation unit 36 and transmitted to the central station 100.

In addition, the processor 42 allocates a predetermined CDMA code to the CDMA channel transmitter 37 according to control data transmitted from the central station 100 to the TS packet, and transmits frequency data to the intermediate frequency generator 39. By outputting, the CDMA modulation and frequency modulation on the data to be transmitted to the central station 100 are executed.

In addition, the processor 42 registers the control TID and the traffic TID allocated from the central station 100 to the demultiplexer 34 to receive and control the control data and traffic data transmitted from the central station 100.

Next, the operation of the apparatus according to the present invention having the above configuration will be described with reference to the data packet diagram shown in FIG. 7 and the flowchart shown in FIG.

First, the network management system 24 of the central station 100 has a variety of information required when the set-top box 4 requests access to the central station 100, for example, a CDMA code for transmitting a control message to the central station 100. And the information service that provides channel frequency data and common PID.

That is, the network management system 24 generates an Ethernet frame including the CDMA code, channel frequency data, and PID for information service for common reception in all set-top boxes, and transmits the data through the IP data processing device 10 through the IP switch 10. 17).

Subsequently, the transmission data processing apparatus 17 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 18 and the RF device 19. It is transmitted to the set-top box 4 through (ST1 step).

On the other hand, in the set-top box 4, the frequency down conversion of the CDMA code data and the channel frequency data transmitted from the central station 100 through the RF device 31, the tuner 32, and the demodulator 33, and the low noise amplification and QPSK modulation is received through the demultiplexer 34. When the processor 42 receives access data, that is, CDMA code data and channel frequency data used when requesting a call connection to the central station 100 through the information service. This is stored in the data memory 41. Then, the information service PID is registered in the demultiplexer 34.

In the above state, when the access request for the Internet, that is, the call connection request, is input from the personal computer 5, the processor 42 enters the subscriber information, i.e., the subscriber ID and password ( After generating a predetermined control message based on the password, subscriber address (IP), etc., and transmitting it to the transmission frame generation unit 36, the access information stored in the data memory 41, that is, the central station By allocating the CDMA code data and the channel frequency data transmitted from the 100 to the CDMA channel transmitter 37 and the intermediate frequency generator 39, an access request is executed for the central station 100.

Subsequently, in the central station 100, the control message transmitted from the set top box 4 is input to the demodulation device 20 through the RF device 19, and the received data processing device (CDMA receiver 21) 22). In addition, the reception data processing device 22 generates an Ethernet frame based on the control message and transmits the generated Ethernet frame to the IP switch 10.

That is, the central international language processor 23 which has received the access request message data from the set-top box 4 through the above-described process (step ST2), preferentially stores the subscriber IP and password included in the control message in the database ( By comparing with the subscriber information stored in 25), it is determined whether the subscriber who has been accessed currently is a legitimate subscriber (ST3 step).

At this time, if it is determined that the subscriber is a legitimate subscriber (step ST4), the database is searched to determine whether there is a currently available TID, and the control TID, traffic TID, channel frequency, and CDMA code are assigned to the set-top box 4. (ST5 step) That is, the central international language processor 23 generates an Ethernet frame for transmitting the TID information, the channel frequency data, and the CDMA code, to the Ethernet interface 171 of the transmission data processing apparatus 17 through the IP switch 10. Will be sent.

In addition, the network management system 24 transmits control data to the IP packet controller 173 of the transmission data processing apparatus 17 through the IP switch 10, thereby allocating the current access information to the subscriber information storage unit 173. In response to an IP address, the control TID and the traffic TID are registered.

Therefore, when the Ethernet frame as shown in FIG. 7 (a) is input through the IP switch 10, the Ethernet interface 171 generates and outputs an IP packet as shown in FIG. 7 (b) based on the Ethernet frame. These IP packets are sequentially stored in the input buffer 172.

Meanwhile, when the IP packet is input and stored in the input buffer 172, the IP packet controller 173 recognizes that the currently input packet data is control data for the set-top box by referring to the header of the stored packet data. . At this time, the length data indicating the length of the data and the message data, that is, the data of the corresponding IP packet are read from the input buffer 172 and input to the PS packet generation unit 175. In this case, the IP packet controller 173 reads the PID and the TID corresponding to the IP address from the subscriber information storage unit 174 based on the IP address of the input data and outputs the PID and TID to the TS packet generation unit 176. .

Meanwhile, the PS packet generation unit 175 generates the PS packet data shown in FIG. 6C based on the length data and the message data applied from the IP packet controller 173 and outputs the PS packet data to the TS packet generation unit 176. In this case, the length data is included in the header portion of the PS packet, and the message data is allocated to the data field.

TS packet generation unit 176 is a PS packet currently applied by the PS packet generation unit 175 based on the length data registered in the header of the PS packet data applied from the PS packet generation unit 175 It is determined whether the control data or the traffic data. That is, in general, in the case of traffic data, the data length thereof is larger than that of the control data. Therefore, when the length data value included in the PS packet data is greater than or equal to a predetermined value, the traffic data is smaller than the control data. It is determined.

Next, when the PS packet input unit 176 determines that the input PS packet is the control data, the TS packet generation unit 176 generates a TS packet as shown in FIG. 7 (d) based on the PS packet applied by the PS packet generation unit 175. On the other hand, if the input PS packet is determined to be traffic data, the TS packet of FIG. 7 (d) is generated based on the header data of the PS packet and the traffic data stored in the input buffer 172. .

In FIG. 7 (d), the TS packet includes a 4-byte TS header, a 184-byte payload allocated to a substantial data area, and 16-byte RS (Reed Solomon) bytes for error correction. The TS header includes an 8-bit sync byte (SC) having a predetermined fixed value, a 1-bit unit start indicator (US) for indicating a start criterion of a TS packet, and a 13-bit And a 4-bit continuity counter (CC) indicating a successive number of TS packets having the same PID.

In addition, one byte corresponding to the PS header of the payload region, that is, 8 bits, is assigned a TID, and the TID is applied from the IP packet controller 173, and the currently transmitted TS packet is a control data. In this case, the control TID, the traffic data TID, and the information service PID are allocated.

On the other hand, the TS packet data output from the PS packet generation unit 176 is, for example, QPSK modulated through the modulator 176 is transmitted to the set-top box 4 through the RF device 19 (step ST6).

Then, when it is determined in step ST4 that the terminal station subscriber requesting access is not a legitimate subscriber, the central international language processor 23 provides message data indicating that it cannot communicate, as described above. In the process, TS packet data is generated and sent to the terminal station requesting access (ST7 step).

On the other hand, in the set top box 4, when the control data is input through the demultiplexer 34, the processor 42 first determines whether it has made an access request. In addition, the processor 42 of the set-top box 4, which has requested access, sets the control TID and the traffic TID allocated from the central station 100 to the demultiplexer 34, and the CDMA allocated from the central station 100. The code and the channel frequency data are transmitted to the CDMA channel transmitter 37 and the intermediate frequency generator 39 to be set as the ID from the central station 100.

That is, according to the above embodiment, an 8-bit TID is set in the TS packet data including one PID. When an access request is received from a legitimate subscriber station subscriber who can receive a multimedia service, the central station acquires a TID for the terminal station. By assigning, 256 terminal stations can be accommodated simultaneously through data including one PID.

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, the terminal station ID allocation method and apparatus can be realized in a multimedia satellite communication system in which TIDs are allocated to terminal stations that require access, so that a plurality of terminal stations can be simultaneously accommodated. do.

Claims (2)

In the multimedia satellite communication system provided with a set-top box for executing the control processing of the entire device and the traffic processing with the communication terminal connected based on the predetermined ID, Common service information sending step of transmitting and configuring the data composed of CDMA code, channel frequency signal and information service PID used for initial connection into TS packet, An access request receiving step of receiving an access control message including a subscriber IP from the set-top box after transmitting common service information, A legal subscriber determination step of determining whether the terminal station subscriber who requested access is a legitimate subscriber; A terminal station ID assignment step of allocating a PID corresponding to the subscriber IP and a control TID and a traffic TID when determined to be a legitimate subscriber, And a terminal station ID sending step of generating TS packet data including the allocated terminal station ID and transmitting the TS packet data to the terminal station requesting access. In the multimedia satellite communication system provided with a set-top box for executing the control processing of the entire device and the traffic processing with the communication terminal connected based on the predetermined ID, An IP switch that switches IP packet data and outputs the Ethernet frame data. An Ethernet interface for generating and outputting an IP packet based on an Ethernet frame input from the IP switch; An input buffer for sequentially storing IP packet data output through the Ethernet interface; An IP packet controller for determining the type of input data based on the header of the IP packet data stored in the input buffer, and controlling the generation of the packet data based on the determined result; Subscriber information storage unit for mapping the PID and the control TID and the traffic TID corresponding to the IP of each set-top box, PS packet generation unit for generating a PS packet based on the data input from the IP packet controller, A TS packet generation unit generating and outputting a TS packet based on PS packet data input from the PS packet generation unit, PID and TID applied from the IP packet controller, and traffic data stored in the input buffer; A modulator for modulating the TS packet data input from the TS packet generator to output an intermediate frequency signal; RF device for outputting the frequency up-conversion and high-output amplified intermediate frequency signal output from the modulator, A central international language processor for allocating a usable TID and generating and transmitting TS packet data including the TID when the access request is received from the set-top box; Terminal station ID allocation apparatus in a multimedia satellite communication system, characterized in that it comprises a database for storing the PID and TID, frequency data and CDMA code data that can be assigned to the set-top box.

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