KR940012157A - How to Give Priority Bits to Data Packets in Bus Systems - Google Patents

How to Give Priority Bits to Data Packets in Bus Systems Download PDF

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Publication number
KR940012157A
KR940012157A KR1019920021208A KR920021208A KR940012157A KR 940012157 A KR940012157 A KR 940012157A KR 1019920021208 A KR1019920021208 A KR 1019920021208A KR 920021208 A KR920021208 A KR 920021208A KR 940012157 A KR940012157 A KR 940012157A
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KR
South Korea
Prior art keywords
priority
level
data packet
sec
data
Prior art date
Application number
KR1019920021208A
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Korean (ko)
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KR950009582B1 (en
Inventor
류기웅
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이헌조
주식회사 금성사
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Priority to KR1019920021208A priority Critical patent/KR950009582B1/en
Publication of KR940012157A publication Critical patent/KR940012157A/en
Application granted granted Critical
Publication of KR950009582B1 publication Critical patent/KR950009582B1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Small-Scale Networks (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

본 발명은 버스 시스템을 갖는 기기 상호간의 데이타 전송방법에 관한 것이며, 전송되는 데이타 패킷에 정보의 중요도에 따라 우선순위 비트를 부여함에 의해 종래에 다수 기기의 데이타 전송 시점을 조정할 필요없이 일정한 시간 간격으로 데이타를 전송할 수 있게 된다. 본 발명에 따른 우선순위 비트 부여 방법은 데이타의 전송속도가 M bps라 할때 1/M sec 구간을 기준으로 하고 데이타 패킷 선두부에 상이한 시간구간에서 중요도가 높은 데이타일수록 “하이”레벨을 유지하는 구간을 길게 설정해 놓은것을 특징으로 한다.The present invention relates to a data transmission method between devices having a bus system, and by assigning priority bits to the transmitted data packets according to the importance of information, the present invention provides a method for transmitting data packets at regular time intervals without the need to adjust the data transmission time of a plurality of devices. Data can be transferred. The priority bit granting method according to the present invention is based on a 1 / M sec interval when the data transmission rate is M bps, and maintains a "high" level for data of higher importance at different time intervals at the head of the data packet. It is characterized in that the long section is set.

Description

버스 시스템에서 데이타 패킷의 우선순위 비트 부여방법How to Give Priority Bits to Data Packets in Bus Systems

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제3도(a)~(d)는 본 발명의 방법에 따라 부여된 우선순위 비트를 갖는 데이타 패킷의 여러가지 포맷을 나타낸 도면.3 (a)-(d) show various formats of a data packet having priority bits assigned in accordance with the method of the present invention.

Claims (4)

전송되는 데이타가 M bps의 전송속도인 경우 1/M sec의 시간 구간을 기준하여 최우선 순위를 갖는 데이타 패킷의 우선순위 비트는 2/M sec 동안 “하이”레벨, 1/M sec동안 “로우”레벨로 부여하고, 중간 우선순위의 데이타 패킷에 부여된 우선순위 비트는 2/M sec동안 “하이”레벨, 2/M sec동안 “로우”레벨로 부여하고, 낮은 우선 순위 또는 통상의 데이타 패킷의 우선순위 비트는 1/M sec 구간동안 “하이”레벨, 1/M sec동안 “로우”레벨로 부여하고, 어느 한 기기에서 데이타 전송이 종료된 후 새로운 데이타를 전송하고자 할때 큐 상태에 있는 새로운 데이타 패킷에 부여되는 우선순위 비트는 1/M sec동안 “하이”레벨, 2/M sec동안 “로우”레벨로 부여하는 것을 특징으로 하는 우선순위 비트 부여방법.If the data being transmitted is at the baud rate of M bps, the priority bit of the data packet with the highest priority based on the time interval of 1 / M sec is the “high” level for 2 / M sec and “low” for 1 / M sec. Level bits, the priority bits assigned to medium priority data packets are given a "high" level for 2 / M sec, a "low" level for 2 / M sec, and a low priority or normal data packet. Priority bits are assigned to the “high” level for 1 / M sec intervals and to “low” level for 1 / M sec. A priority bit is assigned to a data packet by a "high" level for 1 / M sec and a "low" level for 2 / M sec. 제1항에 있어서, 통상의 데이타 패킷이 전송되었을때 이에 응답하는 응답(ACK)데이타 패킷은 상기 중간 우선순위 데이타 패킷 형태를 갖는 것을 특징으로 하는 우선순위 비트 부여방법.2. The method of claim 1, wherein an acknowledgment (ACK) data packet responsive to when a normal data packet is transmitted has the form of the medium priority data packet. 제1항에 있어서, 통상의 데이타 패킷을 전송하고자 할때 충돌이 검출되면 우선순위를 한단계 높이 부여하여 상기 중간우선 순위 데이타 패킷 형태로 재전송되게 한것을 특징으로 하는 우선순위 비트 부여방법.2. The method of claim 1, wherein if a collision is detected when a normal data packet is to be transmitted, the priority level is given one step higher to be retransmitted in the form of the medium priority data packet. 제1항에 있어서, 응답을 원하는 통상의 데이타 패킷이 전송되었을때 일정 시점까지 응답 데이타 패킷을 수신하지 못하면 우선순위를 한단계 높이 부여하여 상기 중간 우선순위 데이타 패킷 형태로 다시 전송되게 한것을 특징으로 하는 우선순위 비트 부여방법.The method of claim 1, wherein if a normal data packet for which a response is to be received is not received until a certain time point, the priority data is given a higher level to be transmitted again in the form of the medium priority data packet. How to assign priority bits. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920021208A 1992-11-12 1992-11-12 Method to grant priority in bus system KR950009582B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920021208A KR950009582B1 (en) 1992-11-12 1992-11-12 Method to grant priority in bus system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920021208A KR950009582B1 (en) 1992-11-12 1992-11-12 Method to grant priority in bus system

Publications (2)

Publication Number Publication Date
KR940012157A true KR940012157A (en) 1994-06-22
KR950009582B1 KR950009582B1 (en) 1995-08-24

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Application Number Title Priority Date Filing Date
KR1019920021208A KR950009582B1 (en) 1992-11-12 1992-11-12 Method to grant priority in bus system

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KR (1) KR950009582B1 (en)

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KR950009582B1 (en) 1995-08-24

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