KR19980014371A - METHOD AND APPARATUS FOR GENERATING BILLING DATA USING PIPERMECODE OF A SATELLITE COMMUNICATION SYSTEM - Google Patents

Abstract

A PPM code of a satellite communication system for generating charging data based on the use of a channel by using a PPM (Periodic Pulse Metering) code promised between two base stations communicating with each other using a satellite The present invention relates to a billing data generation method and apparatus using the same. In the billing data generation method and apparatus according to the present invention, TC (Trunk Code) information of a calling subscriber base station and a called subscriber is read from a memory in response to a call request of an arbitrary subscriber, and based on the read TC information, And stores the contracted PPM code and the time data counted by the timer between the two subscribers calculated based on the read TC information immediately after the end of the call as billing data.

Description

METHOD AND APPARATUS FOR GENERATING BILLING DATA USING PIPERMECODE OF A SATELLITE COMMUNICATION SYSTEM

The present invention relates to a satellite communication system using a satellite, and more particularly, to a satellite communication system for generating billing data on the basis of a fee calculation using a channel using a PPM (Periodic Pulse Metering) code established between two communicating base stations A method for generating billing data using a PPM code, and a device therefor.

Generally speaking, a voice communication using a satellite refers to providing a two-way communication service so that a voice communication can be performed between two subscribers at a remote place via a geostationary satellite installed at an altitude of 36000 Km. (Demand Assignment Multiful Access) satellite communication system in which a communication channel is allocated in accordance with a DMB system.

In FIG. 1, reference numeral 1 denotes a satellite having a plurality of communication channels, reference numeral 2 denotes a central control station for controlling the entire satellite communication system, reference numerals 3A and 3B denote exchangers 11A and 11B, telephones 12A and 12B, And the data terminals 13A and 13B and the facsimile machines 14A and 14B such as a computer and also has a function of communicating with the central control station 2 through the data transmission / .

In FIG. 1, reference symbol S denotes a service channel for transmitting and receiving control data, and T denotes a traffic channel for transmitting and receiving data and voice.

That is, in the above configuration, the central control station 2 periodically transmits the control message through the service channel, and then, based on the response message transmitted from the corresponding base station 3, The base station 3 performs a polling function for checking the availability of the communication capacity or the communication channel. At this time, the transmission of the message to the base station 3 is performed using a TDM channel (time division multi-channel) And the central control station 2 executes the message transmission to the central control station 2 at the base station 3. The central control station 2 is also connected to any base station such as the base station 3A, If there is a call request to the terminal of the base station 3B, the base station 3B determines whether the base station 3B is in a state of being able to communicate based on the information obtained in the polling process, The available traffic channels T of the co-satellites are allocated to the base stations 3A and 3B so that the base stations 3A and 3B can directly communicate with each other.

When communication is completed between the base stations 3A and 3B and the communication end signal is applied from the base station 3A through which the communication request has been made via the service channel S, the central control station 2 transmits The communication end process is executed to release the traffic channel T that was provided to both the base stations 3A and 3B.

On the other hand, since the telecommunication service provider operating the satellite communication network after the termination of the call has to charge an appropriate fee according to the use of the channel, it is necessary to prepare a calculation criterion for the channel. For example, Prior to the detailed management such as setting a difference in the rate according to the time zone, a basic charging standard considering the distance between two communicating base stations is required.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a PPM (Time Division Multiple Access) of a satellite communication system which is capable of generating charging data based on the use of a channel by using a PPM (Periodic Pulse Metering) A method for generating billing data using a code, and a device therefor.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system overview showing an outline of a general satellite communication system,

2 is a block diagram showing a configuration of a base station 3 according to an embodiment of the present invention,

Fig. 3 is a configuration diagram showing the configuration of the network control unit 63 shown in Fig. 2 in more detail.

FIG. 4 shows a memory map (MAP) of the PPM code storage unit 638 shown in FIG.

FIG. 5 is a flowchart for explaining the operation of the apparatus having the configuration of FIG. 2;

DESCRIPTION OF THE REFERENCE SYMBOLS

1: satellite 2: central control station,

3A and 3B: base stations 11A and 11B: exchanger,

12A and 12B: telephones 13A and 13B: data terminals,

14A, 14B: facsimile machine 21: antenna,

22: orthogonal mode converter 23: low noise amplifier,

24: frequency down converter 25: intermediate frequency combination / distribution unit,

27: trunk interface port 32: frequency up converter,

33: high power amplifier 60: telephone data card,

62: SCPC channel unit 63: network control unit,

65: UPH (Utility PCM Highway) 66: MPH (Main PCM Highway),

631: Processor 632: Service channel controller,

633: Dual port RAM 634: Program storage unit,

635: Timer 636: Time data management unit,

637: Time data storage unit 638: PPM code storage unit,

639: Network (net) information storage unit

In order to achieve the above object, a billing data generation method using a PPM code of a satellite communication system according to a first aspect of the present invention is a method for generating TC (Trunk Code) information of a calling subscriber base station and a called subscriber, And a call start time storing step of storing a call start time counted by a timer immediately after assignment as a call, A PPM code reading step of reading the committed PPM code between the two subscribers based on the read TC information, and a data storing step of storing and setting the time data necessary for billing including the PPM code at the same time as ending the call .

The billing data generation apparatus using the PPM code of the satellite communication system according to the second aspect of the present invention includes a timer means for counting the current time and a timer means for counting the current time based on the time data self- (Network) information storing means for storing TC (Trunk Code) information for each subscriber of the satellite communication network, a PPM code value calculated in consideration of the distance between each base station and the NETWORK structure A PPM code storing means for storing a PPM code as data and a call channel allocation for a call request of an arbitrary subscriber and controlling charging of charging data for charging a communication fee based on the data stored in the time data managing means and the PPM code storing means And a control means for calculating a control signal for controlling the motor.

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

2 is a block diagram illustrating the configuration of a base station according to an embodiment of the present invention. Reference numeral 21 denotes a base station for transmitting and receiving an uplink signal and a downlink signal to and from the satellite 1 22 is an orthogonal mode transducer (OMT) for separating and inputting and outputting a signal transmitted and received through the antenna 22 using the polarization characteristic of the frequency, 23 denotes an orthogonal mode transducer A low noise amplifier (LNA) 24 for low-noise amplifying the input downlink frequency signal of, for example, 12.25 to 12.75 GHz; 24, a frequency signal applied through the low noise amplifier 23 to an intermediate frequency signal (DC) down-converter (IF).

Reference numeral 25 denotes a frequency division multiplexer for separating and outputting an intermediate frequency signal IF applied from the frequency down converter 24 to a plurality of intermediate frequency signals and outputting a single channel per channel (SCPC) channel unit (IF C / D: IF Combiner / Distributor) 61 (61 _{1 to} 61 ₃₂ ) that combines and outputs intermediate frequency signals applied from the intermediate frequency combination / An SCPC channel unit 61 for performing encoding and modulation on a transmission signal to be demodulated, decoded and output, or conversely to be transmitted to the central control station 2 or another base station, For transmitting / receiving signals input / output from the central control station 2 or another base station shown in Fig.

Reference numeral 27 denotes a trunk interface port for connecting the base station 2 with another switch or the like and 32 denotes an IF signal of 70 MHz applied from the IF combining / A frequency up converter (UC) 33 for converting the frequency of the uplink frequency signal into a frequency of 14.0 GHz to 14.5 GHz to generate an uplink frequency signal, a high power amplifier 33 for amplifying the uplink frequency signal output from the frequency up converter 32 HPA: High Power Amplifier).

Reference numeral 60 denotes a telephone data card for connecting terminals such as the telephone 12, the data terminal 13 and the facsimile 14 as shown in Fig. 1, A channel communication unit for providing a predetermined communication channel to the subscriber by controlling the channel unit 61 and the trunk interface port 27 and the telephone data card 60 and for informing the central control station 2 of the current state of the base station A network controller for generating and outputting message data; This is for exchanging control data with the above-described SCPC channel unit (SCU) 61, trunk interface port (TIP) 27 and telephone data card (TDC) 60 via the UPH 65 (Utility PCM Highway) , And MPH (66: Main PCM Highway).

3 is a block diagram showing the configuration of the network control unit 63. Reference numeral 631 denotes a system for controlling the whole system and a telephone data card ) Or a call request from a subscriber assigned to the trunk interface port 27, and 632 is a processor for controlling the call setup through communication with the central control station 2, And stores the received data in the dual-port RAM 633 to be described later. In addition, the SCPC channel unit 31 extracts S-ALOHA (Sloted ALOHA) packet information from the S- And a service channel controller (SCC) for generating and outputting a message of the TDM stream.

Reference numeral 633 denotes a dual port RAM, which is provided for data transmission / reception between the processor 631 and the service channel controller (SCC)

Reference numeral 634 denotes a program storage unit in which an operation program of the processor 631 is stored. Reference numeral 635 denotes a timer for counting the current time. Reference numeral 636 denotes time data transmitted from the central control station 2, And compares the time data counted by the timer 635 with a predetermined time interval to manage the accurate current time.

Reference numeral 637 denotes a time data storage unit for periodically updating and storing the current time data calculated by the time data management unit 636. Reference numeral 639 denotes a network for storing TC (Trunk Code) information for each subscriber of the satellite communication network And 638 is a PPM code storage unit for storing the PPM code values calculated in consideration of the distance between each base station and the NETWORK structure as data as shown in FIG.

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

When a call request is made from any subscriber connected to the trunk interface port (TIP) 27 or the telephone data card (TDC) 60 (ST1), the processor 631 transmits a call request to the network information storage unit 639 (ST2) of the Originate SET and the Terminate SET of the called subscriber station from the base station 2 and requests the central control station 2 to set a call on the basis of the TC (ST3)

In response to this, the central control station 2 confirms whether the called subscriber, that is, the called subscriber station (Terminate SET) is in a talkable state, and transmits channel information to be used as a communication channel between the two subscribers The processor 631 checks whether the setting confirmation data in the call is received from the central control station 2 (ST4). If the channel to be used as the communication channel is allocated, the processor 631 transmits the corresponding channel to the calling subscriber (ST5)

On the other hand, if it is determined in step ST4 that the called subscriber station (Terminate SET) is already in a busy state or is unable to talk due to lack of a channel to be used, a call disabled message is transmitted from the central control station 2 In this case, the processor 631 confirms the message transmitted from the central control station 2 (ST6), and notifies the call subscriber that the call is not possible by transmitting a busy tone or the like (ST7).

Immediately after the call is set up in step ST5, the processor 631 starts a call to the central control station 2 on the basis of the time data counted by the timer 635, (ST8). In addition, the PPM code calculated between the subscriber TCs is read out from the PPM code storage unit 638 (ST9)

Then, when the communication between the two subscribers is ended, the processor 631 confirms this (ST10). Then, the central control station 2 transmits all data necessary for billing, that is, the call date, the call start time and end time, and the PPM code read out in step ST9 to the central control station 2 together with the release resources request signal to provide the basis data for charging the call charge, The charging data calculation operation is terminated.

Meanwhile, the billing data transmitted to the central control station 2 by the above-described process is stored in the hard disk provided in the central control station 2, though not shown, You will be prepared.

That is, according to the embodiment, it is possible to generate billing data on the basis of the channel usage using the PPM code set between the two communication bases.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, The central control station 2 calculates the billing data itself based on the TC information provided from the originating SET using the PPM code storage unit 638 and the network information storage unit 639 .

As described above, according to the present invention having the above-described configuration, by generating billing data on the basis of the channel usage using the PPM code set between the two base stations that have performed the call, .

Claims (2)

A TC information reading step of reading TC (Trunk Code) information of a calling subscriber base station and a called subscriber from a memory for a call request of an arbitrary subscriber; An allocation step of allocating a call route between the two subscribers based on the read TC information, A call start time storing step of storing the call start time counted by the timer immediately after allocation to the call, A PPM code reading step of reading the committed PPM code between the two subscribers based on the read TC information, And storing the time data necessary for billing including the PPM code upon termination of the call. Timer means for counting the current time, Time data management means for managing an accurate current time based on the time data counted by the timer means, Network (network) information storage means for storing TC (Trunk Code) information for each subscriber of the satellite communication network, A PPM code storage means for storing, as data, a PPM code value calculated in consideration of a distance between each base station and a NETWORK structure; and And control means for controlling the call channel allocation with respect to the call request of the arbitrary subscriber and calculating the billing data for charging the toll on the basis of the data stored in the time data management means and the PPM code storage means The billing data generation device using the PFM code of the satellite communication system.