KR950022512A - Simulator for performance analysis of VSAT satellite network - Google Patents

Simulator for performance analysis of VSAT satellite network Download PDF

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KR950022512A
KR950022512A KR1019930028940A KR930028940A KR950022512A KR 950022512 A KR950022512 A KR 950022512A KR 1019930028940 A KR1019930028940 A KR 1019930028940A KR 930028940 A KR930028940 A KR 930028940A KR 950022512 A KR950022512 A KR 950022512A
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packet
transmission
unit
mode
vsat
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KR960016533B1 (en
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안동현
김재한
임춘식
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양승택
재단법인 한국전자통신연구소
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/14—Network analysis or design
    • H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/06—Testing, supervising or monitoring using simulated traffic

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Radio Relay Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

본 발명은 VSAT 위성통신망의 트랙픽처리 성능을 컴퓨터로 모의실험을 할 수 있는 시뮬레이터에 관한 것으로, 패킷의 생성과 전송을 처리하고, 중앙제어국으로부터 수신되는 패킷을 받아 처리하며, 각각은 동일한 분포의 패킷도착 간격을 가지는 다수의 VSAT 단말수단과, 상기 다수의 VSAT 단말수단에 연결되며, 처리중에 발생하는 시간지연(ROUND TRIP DELAY)을 고려하여 인바운드(INBOUND)채널과 아웃바운드(OUTBOUND)채널 그리고 상향링크(UPLINK)와 하향링크(DOWN LINK)트래픽을 중계하는 위성 중계수단과, 상기 위성 중계수단을 거쳐 상기 다수의 VSAT 단말수단들로부터 오는 패킷에 대하여 슬롯, 예약요구, 예약(SLOTTED, RESERVATION REQUEST, RESERVATION)모드에 따라 처리한 후 상기 다수의 VSAT 단말수단으로 해당 패킷의 처리결과를 전송하는 중앙제어수단을 구비한다.The present invention relates to a simulator that can simulate the traffic processing performance of a VSAT satellite network with a computer. The present invention deals with the generation and transmission of packets, and receives and processes packets received from a central station, each of which has the same distribution. It is connected to a plurality of VSAT terminal means having a packet arrival interval, and a plurality of VSAT terminal means, in consideration of the time delay (ROUND TRIP DELAY) occurring during processing (INBOUND) channel, outbound (OUTBOUND) channel and uplink Slot, reservation request, reservation (SLOTTED, RESERVATION REQUEST,) for the satellite relay means for relaying UPLINK and DOWN LINK traffic, and the packets coming from the plurality of VSAT terminal means via the satellite relay means. And a central control means for transmitting the result of the processing of the packet to the plurality of VSAT terminal means after processing according to the RESERVATION mode.

Description

브이.에스.에이.티(VSAT) 위성통신망의 성능분석용 시뮬레이터Simulator for performance analysis of VSAT satellite network

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 시뮬레이터의 전체 구성도.1 is an overall configuration diagram of a simulator according to the present invention.

제2도는 VSAT 단말국의 블럭구성도.2 is a block diagram of a VSAT terminal station.

제3도는 사용자 터미널 블럭의 구성도.3 is a configuration diagram of a user terminal block.

제4도는 지수확률변수값 발생기의 구성도.4 is a schematic diagram of an index probability variable value generator.

제5도는 패킷 발생기의 구성도.5 is a block diagram of a packet generator.

제6도는 단말국 트랜시버의 블럭구성도.6 is a block diagram of a terminal station transceiver.

제7도는 송신제어 블럭의 구성도.7 is a configuration diagram of a transmission control block.

제8도는 전송모드 스위치의 구성도.8 is a configuration diagram of a transmission mode switch.

제9도는 모드변환기의 구성도.9 is a configuration diagram of a mode converter.

Claims (7)

패킷의 생성과 전송을 처리하고, 중앙제어국으로부터 수신되는 패킷을 받아 처리하며, 각각은 동일한 분포의 패킷도착 간격을 가지는 다수의 VSAT 단말수단(101)과, 상기 다수의 VSAT 단말수단(101)에 연결되며, 처리중에 발생하는 시간지연(ROUND TRIP DELAY)을 고려하여 인바운드(INBOUND)채널과 아웃바운드(OUTBOUND)채널 그리고 상향링크(UPLINK)와 하향링크(DOWN LINK)트래픽을 중계하는 위성 중계수단과, 상기 위성 중계수단(102)을 거쳐 상기 다수의 VSAT 단말수단(102)들로부터 오는 패킷에 대하여 슬롯, 예약요구, 예약(SLOTTED, RESERVATION REQUEST, RESERVATION)모드에 따라 처리한 후 상기 다수의 VSAT 단말수단(101)으로 해당 패킷의 처리결과를 전송하는 중앙제어수단(103)을 구비하는 것을 특징으로 하는 VSAT 위성통신망의 성능분석용 시뮬레이터.A plurality of VSAT terminal means 101 and a plurality of VSAT terminal means 101 each having a packet arrival interval of the same distribution, each processing a packet generation and transmission, receiving a packet received from a central control station Satellite relay means for relaying inbound and outbound channels, and uplink and downlink traffic in consideration of ROUND TRIP DELAY during processing. And the plurality of VSAT after processing the packet coming from the plurality of VSAT terminal means 102 through the satellite relay means 102 according to slot, reservation request, reservation (SLOTTED, RESERVATION REQUEST, RESERVATION) modes. Simulator for performance analysis of the VSAT satellite communication network, characterized in that it comprises a central control means (103) for transmitting the processing result of the packet to the terminal means (101). 제1항에 있어서, 상기 다수의 VSAT 단말수단(101)중 각각의 VSAT 단말수단(101)은, 펄스 발생간격의 평균이 패킷도착율 파라미터를 가지고 펄스 발생간격이 지수분포를 하도록 펄스를 발생시키는 사용자 터미널(201)과, 사용자 터미널(201)로부터 펄스열을 입력받아 발생된 패킷에 대한 정보들을 데이타 구조체로 만들어 이 구조체속에 포함된 변수들에 대한 필요한 정보를 저장하여 출력하는 패킷발생기(202)와, 상기 패킷 발생기(202)로부터 출력되는 중앙국으로 보낼 패킷을 송신모드에 따라 제어하고 중앙국으로부터 수신되는 패킷을 인식하여 처리하는 단말국 트랜시버(203)를 구비하는 것을 특징으로 하는 VSAT 위성통신망의 성능분석용 시뮬레이터.2. The user of claim 1, wherein each of the plurality of VSAT terminal means 101 generates a pulse such that an average of pulse generation intervals has a packet arrival rate parameter and a pulse generation interval has an exponential distribution. A packet generator 202 for receiving the pulse strings from the terminal 201 and the user terminal 201 to form a data structure, and storing and outputting necessary information on variables included in the structure; Performance of the VSAT satellite communication network characterized in that it comprises a terminal station transceiver 203 for controlling the packet to be sent to the central station output from the packet generator 202 in accordance with the transmission mode, and recognizes and processes the packet received from the central station. Analytical Simulator. 제2항에 있어서, 상기 단말국 트랜시버(203)는, VSAT 단말국(101)의 패킷전송전략에 따라 트랜시버 큐의 크기를 계산하여 각 패킷에 따른 전송모드를 결정하고, 윈도우(Window)를 세팅하여 재전송확률(Backoff probability)에 따라 랜덤시간 지연시킨 후 패킷을 전송하며, 시스템의 운용상태에 따라 전송모드를 변경하는 송신제어부(601)와, 수신된 패킷의 전송모드와 충돌여부를 판단하여 상기 송신제어부(601)의 해당입력 포트로 패킷을 보내는 수신제어부(602)와, 상기 송신제어부(601)로부터의 패킷을 출력단으로 전달하며 현재시간을 확인하여 패킷의 데이타 구조체의 전송시간 필드에 기록하는 패킷전송시간 기록부(603)와, 상기 중앙제어수단(103)으로부터 수신된 패킷이 자기 패킷인지를 확인하여 자기 패킷일 경우 상기 수신제어부(602)와 모드인식부(605)로 전달하는 패킷인식부(604)와, 상기 패킷인식부(604)로부터의 패킷을 트랜시버의 전송모드가 예약 요구모드가 아닌 경우 이를 전달하는 모드인식부(605)와, 패킷의 충돌여부를 판단하여 충돌인 경우 충돌패킷 메모리에 기록하고 그렇지 않은 경우 현재시간을 패킷 데이타 구조체의 패킷처리 완료시각 필드에 기록하고 안전 패킷 메모리에 기록하는 전송 결과처리부(606)를 구비하는 것을 특징으로 하는 VSAT 위성통신망의 성능분석용 시뮬레이터.The terminal station transceiver 203 calculates the size of the transceiver queue according to the packet transmission strategy of the VSAT terminal station 101 to determine the transmission mode according to each packet, and sets a window. The packet is transmitted after delaying the random time according to the backoff probability, and the transmission control unit 601 for changing the transmission mode according to the operation state of the system, and determining whether there is a collision with the transmission mode of the received packet. A reception control unit 602 for transmitting a packet to a corresponding input port of the transmission control unit 601 and a packet from the transmission control unit 601 to an output terminal, checking the current time, and recording the packet in the transmission time field of the data structure of the packet. The packet transmission time recording unit 603 checks whether the packet received from the central control unit 103 is a magnetic packet, and transmits the packet to the reception control unit 602 and the mode recognition unit 605 if it is a magnetic packet. A packet recognition unit 604, a mode recognition unit 605 for transmitting a packet from the packet recognition unit 604 when the transmission mode of the transceiver is not a reservation request mode, and a collision determination by determining whether or not the packet collision In the case of performance analysis of the VSAT satellite communication network comprising a transmission result processing unit 606 for recording in the collision packet memory, otherwise recording the current time in the packet processing completion time field of the packet data structure and in the safety packet memory. Dragon simulator. 제3항에 있어서, 상기 송신제어부(601)는, 패킷발생기(202)로부터 들어오는 패킷을 쌓아두고 큐가 트리거(TRIGGER)될 때마다 선입선출(FIFO)서비스전략으로 패킷을 출력하는 트랜시버 큐(701)와, 상기 트랜시버 큐(701)로부터의 패킷을 수신하고 현재의 VSAT 단말국(101)의 전송모드를 메모리로부터 읽어 모드상태를 패킷 데이타 구조쳉의 단말기 모드 필드에 기록하고 해당 모드에 따라 출력을 스위칭하는 전송모드 스위치(702)와, 예약모드로 스위칭되어 상기 전송모드 스위치(702)로부터 출력되는 패킷을 자기 단말기로 예약된 단위슬롯에 패킷을 실어보내기 위하여 그 슬롯의 시작점까지 기다렸다가 패킷을 출력포트로 보내는 예약패킷처리기(703)와, 슬롯(SLOTTED)모드로 스위칭되어 상기 전송모드 스위치(702)로부터 출력되는 패킷을 윈도우 크기에 따라 FIFO큐를 만들어 트리거(TRIGGER)가 될 때마다 출력되는 전송 윈도우부(704)와, 슬롯(SLOTTED)모드에서 타 패킷간의 충돌을 줄이기 위하여 결정한 재전송 확률에 따라 랜덤시간을 계산항여 그시간 만큼 지연시킨 후 패킷을 출력포트로 보내는 랜덤지연기(705)와, 상기 트랜시버 큐(701)의 큐 길이를 업 데이트(UP DATE)하여 가지고 있다가 그 값이 예약요구 임계점에 도달하면 VSAT 단말국(101)의 모드를 예약요구모드로 전환시키는 트랜시버 큐 카운터(706)와, 상기 전송윈도우부(704)에 들어있는 패킷의 수가 윈도우 크기가 될 때까지 트랜시버 큐(701)을 트리거(TRIGGER)시킨 다음 전송윈도우부(707)를 트리거(TRIGGER)시키는 전송윈도우 카운터(707)를 구비하는 것을 특징으로 하는 VSAT 위성통신망의 성능분석용 시뮬레이터.The transceiver queue 701 according to claim 3, wherein the transmission control unit 601 accumulates the packets coming from the packet generator 202 and outputs the packets through a first-in first-out (FIFO) service strategy whenever the queue is triggered. Receive the packet from the transceiver queue 701, read the current transmission mode of the VSAT terminal station 101 from the memory, record the mode state in the terminal mode field of the packet data structure, and output the output according to the corresponding mode. The transmission mode switch 702 for switching and the reservation mode switched to the reserved mode, the packet output from the transmission mode switch 702 waits until the start point of the slot to send the packet to the slots reserved for its terminal and outputs the packet to the output port. The packet processor 703 sends the packet to the reserved packet processor 703 and the slotted slot mode is set to the FIFO queue according to the window size. After delaying the random time by the retransmission probability determined in order to reduce the collision between other transmission packets in the transmission window unit 704 and the slot mode in the slot mode, the packet is delayed by that time. The random delay unit 705 sent to the output port and the queue length of the transceiver queue 701 are updated. When the value reaches the reservation request threshold, the mode of the VSAT terminal station 101 is changed. Transceiver queue counter 706 for switching to the reservation request mode, and triggers transceiver queue 701 until the number of packets contained in the transmission window unit 704 becomes a window size. And a transmission window counter (707) for triggering (TRIGGER). 제4항에 있어서, 상기 랜덤지연기(705)는, 주어진 재전송 확률에 따라 구해진 확률값에 패킷의 시간길이를 곱하여 구한 값을 출력하는 랜덤시간생성기(1001)와, 상기 랜덤시간생성기(1001)로부터 입력된 값(시간)만큼 패킷을 지연시키는 시간지연부(1002)와, 현시점에서 그 다음으로 다가오는 슬롯의 시작시점까지 기다릴 시간을 구한뒤 그 시간만큼 기다린 후 패킷을 보내는 슬롯동기화부(1003)와, 슬롯(SLOTTED)또는 예약구간인지를 계산하여 확인하고 예약구간 내에 들어가는 경우 지연시간만큼 또다시 지연시킨 후 패킷을 출력포트로 보내는 예약구간회피부(1004)를 구비하는 것을 특징으로 하는 VSAT 위성통신망의 성능분석용 시뮬레이터.The random delay generator 705 of claim 4, further comprising: a random time generator 1001 for outputting a value obtained by multiplying a packet length by a probability value obtained according to a given retransmission probability, and from the random time generator 1001. The time delay unit 1002 delays the packet by the input value (time), and the slot synchronization unit 1003 sends a packet after waiting for the time after calculating the time to wait from the present time to the start point of the next upcoming slot. VSAT satellite communication network comprising a reservation section avoidance (1004) for calculating and confirming whether the slot (SLOTTED) or reservation section, and if it enters within the reservation section delays again by the delay time and sends the packet to the output port. Simulator for performance analysis. 제1항에 있어서, 상기 중앙제어수단(103)은, 상기 위성중계수단(102)으로부터 패킷의 충돌 또는 성공적으로 패킷을 수신하였는가를 인식하는 패킷충돌 인식부(1401)와, 상기 패킷 충돌 인식부(1401)에서 성공적으로 수신된 패킷을 신호처리하여 전송하는 중앙신호처리부(1402)와, 상기 중앙신호처리부(1402)로부터의 패킷을 전달하는 송수신 접속부(1403)와, 상기 송수신 접속부(1403)를 통해 전달된 패킷을 주 컴퓨터내의 컴퓨팅 서버블럭(1407)과 인터페이스하는 사용자 접속장치(1404)와, 상기 패킷충돌 인식부(1401)에서 패킷충돌이 일어나면 위성중계수단(102)으로 재전송하는 중앙송출부(1406)와, 상기 중앙신호처리부(1402)와 상기 중앙송출부(1406)를 인터페이스하는 송출접속부(1405)를 구비하는 것을 특징으로 하는 VSAT 위성통신망의 성능분석용 시뮬레이터.2. The packet collision recognizing unit (140) of claim 1, wherein the central control unit (103) recognizes whether a packet collision or successful packet has been received from the satellite relay unit (102), and the packet collision recognition unit. A central signal processor 1402 for signal-processing and transmitting a packet successfully received at 1401, a transmission / reception connection unit 1403 for transmitting a packet from the central signal processing unit 1402, and the transmission / reception connection unit 1403 A user access device 1404 for interfacing the packet transmitted through the computing server block 1407 in the host computer, and a central transmission unit for retransmitting the packet collision in the packet collision recognition unit 1401 to the satellite relay unit 102. And a transmission connection unit (1405) for interfacing the central signal processing unit (1402) and the central transmission unit (1406). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930028940A 1993-12-21 1993-12-21 Simulator to analyze performance of vsat satellite communication network KR960016533B1 (en)

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KR102192449B1 (en) 2020-07-22 2020-12-16 주식회사 큐브뷰 Very-small aperture terminal with Hot spot zone device for satellite communication

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102192449B1 (en) 2020-07-22 2020-12-16 주식회사 큐브뷰 Very-small aperture terminal with Hot spot zone device for satellite communication

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